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view src/audio/SDL_audiotypecvt.c @ 5067:61d53410eb41

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Fixed bug #859 CREATE_SUBDIRS helps a lot if browsing HTML documentation in a file browser. ALWAYS_DETAILED_SEC makes sure everything has at least the automatic documentation like function prototype and source references. STRIP_FROM_PATH allows you to include only the relevant portions of the files' paths, cleaning up both the file list and directory tree, though you need to change the path listed here to match wherever you put SDL. ALIASES avoids some warnings generated by C:\source\svn.libsdl.org\trunk\SDL\src\joystick\darwin\10.3.9-FIX\IOHIDLib.h. It seems Apple uses a few commands which are not normally supported by Doxygen. BUILTIN_STL_SUPPORT adds support for parsing code which makes use of the standard template library. There isn't a lot of C++ in SDL (some in bwindow at least), but this still seems like a good idea. TYPEDEF_HIDES_STRUCT means that for code like this: typedef struct A {int B;} C; C is documented as a structure containing B instead of a typedef mapped to A. EXTRACT_ALL, EXTRACT_PRIVATE, EXTRACT_STATIC, EXTRACT_LOCAL_METHODS, EXTRACT_ANON_NSPACES and INTERNAL_DOCS make sure that _everything_ is documented. CASE_SENSE_NAMES = NO avoids potential conflicts when building documentation on case insensitive file systems like NTFS and FAT32. WARN_NO_PARAMDOC lets you know when you have documented some, but not all, of the parameters of a function. This is useful when you're working on adding such documentation since it makes partially documented functions easier to spot. WARN_LOGFILE writes warnings to a seperate file instead of mixing them in with stdout. When not running in quiet mode, these warnings can be hard to spot without this flag. I added *.h.in and *.h.default to FILE_PATTERNS to generate documentation for config.h.in and config.h.default. RECURSIVE tells doxygen to look not only in the input directory, but also in subfolders. EXCLUDE avoids documenting things like test programs, examples and templates which need to be documented separately. I've used EXCLUDE_PATTERNS to exclude non-source subdirectories that often find their way into source folders (such as obj or .svn). EXAMPLE_PATH lists directories doxygen will search to find included example code. So far, SDL doesn't really use this feature, but I've listed some likely locations. SOURCE_BROWSER adds syntax highlighted source code to the HTML output. USE_HTAGS is nice, but not available on Windows. INLINE_SOURCES adds the body of a function to it's documentation so you can quickly see exactly what it does. ALPHABETICAL_INDEX generates an alphabetical list of all structures, functions, etc., which makes it much easier to find what you're looking for. IGNORE_PREFIX skips the SDL_ prefix when deciding which index page to place an item on so you don't have everything show up under "S". HTML_DYNAMIC_SECTIONS hides the includes/included by diagrams by default and adds JavaScript to allow the user to show and hide them by clicking a link. ENUM_VALUES_PER_LINE = 1 makes enums easier to read by placing each value on it's own line. GENERATE_TREEVIEW produces a two frame index page with a navigation tree on the left. I have LaTeX and man pages turned off to speed up doxygen, you may want to turn them back on yourself. I added _WIN32=1 to PREDEFINED to cause SDL to output documentation related to Win32 builds of SDL. Normally, doxygen gets confused since there are multiple definitions for various structures and formats that vary by platform. Without this doxygen can produce broken documentation or, if you're lucky, output documentation only for the dummy drivers, which isn't very useful. You need to pick a platform. GENERATE_TAGFILE produces a file which can be used to link other doxygen documentation to the SDL documentation. CLASS_DIAGRAMS turns on class diagrams even when dot is not available. HAVE_DOT tells doxygen to try to use dot to generate diagrams. TEMPLATE_RELATIONS and INCLUDE_GRAPH add additional diagrams to the documentation. DOT_MULTI_TARGETS speeds up dot. OUTPUT_DIRECTORY, INPUT and other paths reflect the fact that this Doxyfile is intended to process src as well as include and is being run from a separate subdirectory. Doxygen produces several temporary files while it's running and if interrupted, can leave those files behind. It's easier to clean up if there aren't a hundred or so files in the same folder. I typically run doxygen in SDL/doxy and set the output directory to '.'. Since doxygen puts it's output in subfolders by type, this keeps things pretty well organised. You could use '../doc' instead and get the same results.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 21 Jan 2011 12:57:01 -0800
parents 8c9cbb623d55
children b530ef003506
line wrap: on
line source

/* DO NOT EDIT!  This file is generated by sdlgenaudiocvt.pl */
/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2010 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#include "SDL_config.h"
#include "SDL_audio.h"
#include "SDL_audio_c.h"

#ifndef DEBUG_CONVERT
#define DEBUG_CONVERT 0
#endif


/* If you can guarantee your data and need space, you can eliminate code... */

/* Just build the arbitrary resamplers if you're saving code space. */
#ifndef LESS_RESAMPLERS
#define LESS_RESAMPLERS 0
#endif

/* Don't build any resamplers if you're REALLY saving code space. */
#ifndef NO_RESAMPLERS
#define NO_RESAMPLERS 0
#endif

/* Don't build any type converters if you're saving code space. */
#ifndef NO_CONVERTERS
#define NO_CONVERTERS 0
#endif


/* *INDENT-OFF* */

#define DIVBY127 0.0078740157480315f
#define DIVBY32767 3.05185094759972e-05f
#define DIVBY2147483647 4.6566128752458e-10f

#if !NO_CONVERTERS

static void SDLCALL
SDL_Convert_U8_to_S8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Sint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U8 to AUDIO_S8.\n");
#endif

    src = (const Uint8 *) cvt->buf;
    dst = (Sint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, ++src, ++dst) {
        const Sint8 val = ((*src) ^ 0x80);
        *dst = ((Sint8) val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S8);
    }
}

static void SDLCALL
SDL_Convert_U8_to_U16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U8 to AUDIO_U16LSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Uint16 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Uint16 val = (((Uint16) *src) << 8);
        *dst = SDL_SwapLE16(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16LSB);
    }
}

static void SDLCALL
SDL_Convert_U8_to_S16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U8 to AUDIO_S16LSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint16 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Sint16 val = (((Sint16) ((*src) ^ 0x80)) << 8);
        *dst = ((Sint16) SDL_SwapLE16(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16LSB);
    }
}

static void SDLCALL
SDL_Convert_U8_to_U16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U8 to AUDIO_U16MSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Uint16 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Uint16 val = (((Uint16) *src) << 8);
        *dst = SDL_SwapBE16(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16MSB);
    }
}

static void SDLCALL
SDL_Convert_U8_to_S16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U8 to AUDIO_S16MSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint16 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Sint16 val = (((Sint16) ((*src) ^ 0x80)) << 8);
        *dst = ((Sint16) SDL_SwapBE16(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16MSB);
    }
}

static void SDLCALL
SDL_Convert_U8_to_S32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U8 to AUDIO_S32LSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 4)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((*src) ^ 0x80)) << 24);
        *dst = ((Sint32) SDL_SwapLE32(val));
    }

    cvt->len_cvt *= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32LSB);
    }
}

static void SDLCALL
SDL_Convert_U8_to_S32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U8 to AUDIO_S32MSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 4)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((*src) ^ 0x80)) << 24);
        *dst = ((Sint32) SDL_SwapBE32(val));
    }

    cvt->len_cvt *= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32MSB);
    }
}

static void SDLCALL
SDL_Convert_U8_to_F32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U8 to AUDIO_F32LSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 4)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const float val = ((((float) *src) * DIVBY127) - 1.0f);
        *dst = SDL_SwapFloatLE(val);
    }

    cvt->len_cvt *= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32LSB);
    }
}

static void SDLCALL
SDL_Convert_U8_to_F32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U8 to AUDIO_F32MSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 4)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const float val = ((((float) *src) * DIVBY127) - 1.0f);
        *dst = SDL_SwapFloatBE(val);
    }

    cvt->len_cvt *= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32MSB);
    }
}

static void SDLCALL
SDL_Convert_S8_to_U8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Uint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S8 to AUDIO_U8.\n");
#endif

    src = (const Uint8 *) cvt->buf;
    dst = (Uint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, ++src, ++dst) {
        const Uint8 val = ((((Sint8) *src)) ^ 0x80);
        *dst = val;
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U8);
    }
}

static void SDLCALL
SDL_Convert_S8_to_U16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S8 to AUDIO_U16LSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Uint16 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Uint16 val = (((Uint16) ((((Sint8) *src)) ^ 0x80)) << 8);
        *dst = SDL_SwapLE16(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16LSB);
    }
}

static void SDLCALL
SDL_Convert_S8_to_S16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S8 to AUDIO_S16LSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint16 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Sint16 val = (((Sint16) ((Sint8) *src)) << 8);
        *dst = ((Sint16) SDL_SwapLE16(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16LSB);
    }
}

static void SDLCALL
SDL_Convert_S8_to_U16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S8 to AUDIO_U16MSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Uint16 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Uint16 val = (((Uint16) ((((Sint8) *src)) ^ 0x80)) << 8);
        *dst = SDL_SwapBE16(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16MSB);
    }
}

static void SDLCALL
SDL_Convert_S8_to_S16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S8 to AUDIO_S16MSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint16 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Sint16 val = (((Sint16) ((Sint8) *src)) << 8);
        *dst = ((Sint16) SDL_SwapBE16(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16MSB);
    }
}

static void SDLCALL
SDL_Convert_S8_to_S32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S8 to AUDIO_S32LSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 4)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((Sint8) *src)) << 24);
        *dst = ((Sint32) SDL_SwapLE32(val));
    }

    cvt->len_cvt *= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32LSB);
    }
}

static void SDLCALL
SDL_Convert_S8_to_S32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S8 to AUDIO_S32MSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 4)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((Sint8) *src)) << 24);
        *dst = ((Sint32) SDL_SwapBE32(val));
    }

    cvt->len_cvt *= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32MSB);
    }
}

static void SDLCALL
SDL_Convert_S8_to_F32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S8 to AUDIO_F32LSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 4)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const float val = (((float) ((Sint8) *src)) * DIVBY127);
        *dst = SDL_SwapFloatLE(val);
    }

    cvt->len_cvt *= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32LSB);
    }
}

static void SDLCALL
SDL_Convert_S8_to_F32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint8 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S8 to AUDIO_F32MSB.\n");
#endif

    src = ((const Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 4)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint8); i; --i, --src, --dst) {
        const float val = (((float) ((Sint8) *src)) * DIVBY127);
        *dst = SDL_SwapFloatBE(val);
    }

    cvt->len_cvt *= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32MSB);
    }
}

static void SDLCALL
SDL_Convert_U16LSB_to_U8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16LSB to AUDIO_U8.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint8 val = ((Uint8) (SDL_SwapLE16(*src) >> 8));
        *dst = val;
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U8);
    }
}

static void SDLCALL
SDL_Convert_U16LSB_to_S8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16LSB to AUDIO_S8.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint8 val = ((Sint8) (((SDL_SwapLE16(*src)) ^ 0x8000) >> 8));
        *dst = ((Sint8) val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S8);
    }
}

static void SDLCALL
SDL_Convert_U16LSB_to_S16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16LSB to AUDIO_S16LSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint16 val = ((SDL_SwapLE16(*src)) ^ 0x8000);
        *dst = ((Sint16) SDL_SwapLE16(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16LSB);
    }
}

static void SDLCALL
SDL_Convert_U16LSB_to_U16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16LSB to AUDIO_U16MSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint16 val = SDL_SwapLE16(*src);
        *dst = SDL_SwapBE16(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16MSB);
    }
}

static void SDLCALL
SDL_Convert_U16LSB_to_S16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16LSB to AUDIO_S16MSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint16 val = ((SDL_SwapLE16(*src)) ^ 0x8000);
        *dst = ((Sint16) SDL_SwapBE16(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16MSB);
    }
}

static void SDLCALL
SDL_Convert_U16LSB_to_S32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16LSB to AUDIO_S32LSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((SDL_SwapLE16(*src)) ^ 0x8000)) << 16);
        *dst = ((Sint32) SDL_SwapLE32(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32LSB);
    }
}

static void SDLCALL
SDL_Convert_U16LSB_to_S32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16LSB to AUDIO_S32MSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((SDL_SwapLE16(*src)) ^ 0x8000)) << 16);
        *dst = ((Sint32) SDL_SwapBE32(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32MSB);
    }
}

static void SDLCALL
SDL_Convert_U16LSB_to_F32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16LSB to AUDIO_F32LSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const float val = ((((float) SDL_SwapLE16(*src)) * DIVBY32767) - 1.0f);
        *dst = SDL_SwapFloatLE(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32LSB);
    }
}

static void SDLCALL
SDL_Convert_U16LSB_to_F32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16LSB to AUDIO_F32MSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const float val = ((((float) SDL_SwapLE16(*src)) * DIVBY32767) - 1.0f);
        *dst = SDL_SwapFloatBE(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32MSB);
    }
}

static void SDLCALL
SDL_Convert_S16LSB_to_U8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16LSB to AUDIO_U8.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint8 val = ((Uint8) (((((Sint16) SDL_SwapLE16(*src))) ^ 0x8000) >> 8));
        *dst = val;
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U8);
    }
}

static void SDLCALL
SDL_Convert_S16LSB_to_S8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16LSB to AUDIO_S8.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint8 val = ((Sint8) (((Sint16) SDL_SwapLE16(*src)) >> 8));
        *dst = ((Sint8) val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S8);
    }
}

static void SDLCALL
SDL_Convert_S16LSB_to_U16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16LSB to AUDIO_U16LSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint16 val = ((((Sint16) SDL_SwapLE16(*src))) ^ 0x8000);
        *dst = SDL_SwapLE16(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16LSB);
    }
}

static void SDLCALL
SDL_Convert_S16LSB_to_U16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16LSB to AUDIO_U16MSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint16 val = ((((Sint16) SDL_SwapLE16(*src))) ^ 0x8000);
        *dst = SDL_SwapBE16(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16MSB);
    }
}

static void SDLCALL
SDL_Convert_S16LSB_to_S16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16LSB to AUDIO_S16MSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) SDL_SwapLE16(*src));
        *dst = ((Sint16) SDL_SwapBE16(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16MSB);
    }
}

static void SDLCALL
SDL_Convert_S16LSB_to_S32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16LSB to AUDIO_S32LSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((Sint16) SDL_SwapLE16(*src))) << 16);
        *dst = ((Sint32) SDL_SwapLE32(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32LSB);
    }
}

static void SDLCALL
SDL_Convert_S16LSB_to_S32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16LSB to AUDIO_S32MSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((Sint16) SDL_SwapLE16(*src))) << 16);
        *dst = ((Sint32) SDL_SwapBE32(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32MSB);
    }
}

static void SDLCALL
SDL_Convert_S16LSB_to_F32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16LSB to AUDIO_F32LSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const float val = (((float) ((Sint16) SDL_SwapLE16(*src))) * DIVBY32767);
        *dst = SDL_SwapFloatLE(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32LSB);
    }
}

static void SDLCALL
SDL_Convert_S16LSB_to_F32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16LSB to AUDIO_F32MSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const float val = (((float) ((Sint16) SDL_SwapLE16(*src))) * DIVBY32767);
        *dst = SDL_SwapFloatBE(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32MSB);
    }
}

static void SDLCALL
SDL_Convert_U16MSB_to_U8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16MSB to AUDIO_U8.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint8 val = ((Uint8) (SDL_SwapBE16(*src) >> 8));
        *dst = val;
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U8);
    }
}

static void SDLCALL
SDL_Convert_U16MSB_to_S8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16MSB to AUDIO_S8.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint8 val = ((Sint8) (((SDL_SwapBE16(*src)) ^ 0x8000) >> 8));
        *dst = ((Sint8) val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S8);
    }
}

static void SDLCALL
SDL_Convert_U16MSB_to_U16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16MSB to AUDIO_U16LSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint16 val = SDL_SwapBE16(*src);
        *dst = SDL_SwapLE16(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16LSB);
    }
}

static void SDLCALL
SDL_Convert_U16MSB_to_S16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16MSB to AUDIO_S16LSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint16 val = ((SDL_SwapBE16(*src)) ^ 0x8000);
        *dst = ((Sint16) SDL_SwapLE16(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16LSB);
    }
}

static void SDLCALL
SDL_Convert_U16MSB_to_S16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16MSB to AUDIO_S16MSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint16 val = ((SDL_SwapBE16(*src)) ^ 0x8000);
        *dst = ((Sint16) SDL_SwapBE16(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16MSB);
    }
}

static void SDLCALL
SDL_Convert_U16MSB_to_S32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16MSB to AUDIO_S32LSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((SDL_SwapBE16(*src)) ^ 0x8000)) << 16);
        *dst = ((Sint32) SDL_SwapLE32(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32LSB);
    }
}

static void SDLCALL
SDL_Convert_U16MSB_to_S32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16MSB to AUDIO_S32MSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((SDL_SwapBE16(*src)) ^ 0x8000)) << 16);
        *dst = ((Sint32) SDL_SwapBE32(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32MSB);
    }
}

static void SDLCALL
SDL_Convert_U16MSB_to_F32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16MSB to AUDIO_F32LSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const float val = ((((float) SDL_SwapBE16(*src)) * DIVBY32767) - 1.0f);
        *dst = SDL_SwapFloatLE(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32LSB);
    }
}

static void SDLCALL
SDL_Convert_U16MSB_to_F32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_U16MSB to AUDIO_F32MSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const float val = ((((float) SDL_SwapBE16(*src)) * DIVBY32767) - 1.0f);
        *dst = SDL_SwapFloatBE(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32MSB);
    }
}

static void SDLCALL
SDL_Convert_S16MSB_to_U8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16MSB to AUDIO_U8.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint8 val = ((Uint8) (((((Sint16) SDL_SwapBE16(*src))) ^ 0x8000) >> 8));
        *dst = val;
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U8);
    }
}

static void SDLCALL
SDL_Convert_S16MSB_to_S8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16MSB to AUDIO_S8.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint8 val = ((Sint8) (((Sint16) SDL_SwapBE16(*src)) >> 8));
        *dst = ((Sint8) val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S8);
    }
}

static void SDLCALL
SDL_Convert_S16MSB_to_U16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16MSB to AUDIO_U16LSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint16 val = ((((Sint16) SDL_SwapBE16(*src))) ^ 0x8000);
        *dst = SDL_SwapLE16(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16LSB);
    }
}

static void SDLCALL
SDL_Convert_S16MSB_to_S16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16MSB to AUDIO_S16LSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) SDL_SwapBE16(*src));
        *dst = ((Sint16) SDL_SwapLE16(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16LSB);
    }
}

static void SDLCALL
SDL_Convert_S16MSB_to_U16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16MSB to AUDIO_U16MSB.\n");
#endif

    src = (const Uint16 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, ++src, ++dst) {
        const Uint16 val = ((((Sint16) SDL_SwapBE16(*src))) ^ 0x8000);
        *dst = SDL_SwapBE16(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16MSB);
    }
}

static void SDLCALL
SDL_Convert_S16MSB_to_S32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16MSB to AUDIO_S32LSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((Sint16) SDL_SwapBE16(*src))) << 16);
        *dst = ((Sint32) SDL_SwapLE32(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32LSB);
    }
}

static void SDLCALL
SDL_Convert_S16MSB_to_S32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16MSB to AUDIO_S32MSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((Sint32 *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const Sint32 val = (((Sint32) ((Sint16) SDL_SwapBE16(*src))) << 16);
        *dst = ((Sint32) SDL_SwapBE32(val));
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32MSB);
    }
}

static void SDLCALL
SDL_Convert_S16MSB_to_F32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16MSB to AUDIO_F32LSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const float val = (((float) ((Sint16) SDL_SwapBE16(*src))) * DIVBY32767);
        *dst = SDL_SwapFloatLE(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32LSB);
    }
}

static void SDLCALL
SDL_Convert_S16MSB_to_F32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint16 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S16MSB to AUDIO_F32MSB.\n");
#endif

    src = ((const Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    dst = ((float *) (cvt->buf + cvt->len_cvt * 2)) - 1;
    for (i = cvt->len_cvt / sizeof (Uint16); i; --i, --src, --dst) {
        const float val = (((float) ((Sint16) SDL_SwapBE16(*src))) * DIVBY32767);
        *dst = SDL_SwapFloatBE(val);
    }

    cvt->len_cvt *= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32MSB);
    }
}

static void SDLCALL
SDL_Convert_S32LSB_to_U8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Uint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32LSB to AUDIO_U8.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Uint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Uint8 val = ((Uint8) (((((Sint32) SDL_SwapLE32(*src))) ^ 0x80000000) >> 24));
        *dst = val;
    }

    cvt->len_cvt /= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U8);
    }
}

static void SDLCALL
SDL_Convert_S32LSB_to_S8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Sint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32LSB to AUDIO_S8.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Sint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Sint8 val = ((Sint8) (((Sint32) SDL_SwapLE32(*src)) >> 24));
        *dst = ((Sint8) val);
    }

    cvt->len_cvt /= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S8);
    }
}

static void SDLCALL
SDL_Convert_S32LSB_to_U16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32LSB to AUDIO_U16LSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Uint16 val = ((Uint16) (((((Sint32) SDL_SwapLE32(*src))) ^ 0x80000000) >> 16));
        *dst = SDL_SwapLE16(val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16LSB);
    }
}

static void SDLCALL
SDL_Convert_S32LSB_to_S16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32LSB to AUDIO_S16LSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) (((Sint32) SDL_SwapLE32(*src)) >> 16));
        *dst = ((Sint16) SDL_SwapLE16(val));
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16LSB);
    }
}

static void SDLCALL
SDL_Convert_S32LSB_to_U16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32LSB to AUDIO_U16MSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Uint16 val = ((Uint16) (((((Sint32) SDL_SwapLE32(*src))) ^ 0x80000000) >> 16));
        *dst = SDL_SwapBE16(val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16MSB);
    }
}

static void SDLCALL
SDL_Convert_S32LSB_to_S16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32LSB to AUDIO_S16MSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) (((Sint32) SDL_SwapLE32(*src)) >> 16));
        *dst = ((Sint16) SDL_SwapBE16(val));
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16MSB);
    }
}

static void SDLCALL
SDL_Convert_S32LSB_to_S32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32LSB to AUDIO_S32MSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Sint32 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Sint32 val = ((Sint32) SDL_SwapLE32(*src));
        *dst = ((Sint32) SDL_SwapBE32(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32MSB);
    }
}

static void SDLCALL
SDL_Convert_S32LSB_to_F32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32LSB to AUDIO_F32LSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (float *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const float val = (((float) ((Sint32) SDL_SwapLE32(*src))) * DIVBY2147483647);
        *dst = SDL_SwapFloatLE(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32LSB);
    }
}

static void SDLCALL
SDL_Convert_S32LSB_to_F32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32LSB to AUDIO_F32MSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (float *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const float val = (((float) ((Sint32) SDL_SwapLE32(*src))) * DIVBY2147483647);
        *dst = SDL_SwapFloatBE(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32MSB);
    }
}

static void SDLCALL
SDL_Convert_S32MSB_to_U8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Uint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32MSB to AUDIO_U8.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Uint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Uint8 val = ((Uint8) (((((Sint32) SDL_SwapBE32(*src))) ^ 0x80000000) >> 24));
        *dst = val;
    }

    cvt->len_cvt /= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U8);
    }
}

static void SDLCALL
SDL_Convert_S32MSB_to_S8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Sint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32MSB to AUDIO_S8.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Sint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Sint8 val = ((Sint8) (((Sint32) SDL_SwapBE32(*src)) >> 24));
        *dst = ((Sint8) val);
    }

    cvt->len_cvt /= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S8);
    }
}

static void SDLCALL
SDL_Convert_S32MSB_to_U16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32MSB to AUDIO_U16LSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Uint16 val = ((Uint16) (((((Sint32) SDL_SwapBE32(*src))) ^ 0x80000000) >> 16));
        *dst = SDL_SwapLE16(val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16LSB);
    }
}

static void SDLCALL
SDL_Convert_S32MSB_to_S16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32MSB to AUDIO_S16LSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) (((Sint32) SDL_SwapBE32(*src)) >> 16));
        *dst = ((Sint16) SDL_SwapLE16(val));
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16LSB);
    }
}

static void SDLCALL
SDL_Convert_S32MSB_to_U16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32MSB to AUDIO_U16MSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Uint16 val = ((Uint16) (((((Sint32) SDL_SwapBE32(*src))) ^ 0x80000000) >> 16));
        *dst = SDL_SwapBE16(val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16MSB);
    }
}

static void SDLCALL
SDL_Convert_S32MSB_to_S16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32MSB to AUDIO_S16MSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) (((Sint32) SDL_SwapBE32(*src)) >> 16));
        *dst = ((Sint16) SDL_SwapBE16(val));
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16MSB);
    }
}

static void SDLCALL
SDL_Convert_S32MSB_to_S32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32MSB to AUDIO_S32LSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (Sint32 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const Sint32 val = ((Sint32) SDL_SwapBE32(*src));
        *dst = ((Sint32) SDL_SwapLE32(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32LSB);
    }
}

static void SDLCALL
SDL_Convert_S32MSB_to_F32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32MSB to AUDIO_F32LSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (float *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const float val = (((float) ((Sint32) SDL_SwapBE32(*src))) * DIVBY2147483647);
        *dst = SDL_SwapFloatLE(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32LSB);
    }
}

static void SDLCALL
SDL_Convert_S32MSB_to_F32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const Uint32 *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_S32MSB to AUDIO_F32MSB.\n");
#endif

    src = (const Uint32 *) cvt->buf;
    dst = (float *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (Uint32); i; --i, ++src, ++dst) {
        const float val = (((float) ((Sint32) SDL_SwapBE32(*src))) * DIVBY2147483647);
        *dst = SDL_SwapFloatBE(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32MSB);
    }
}

static void SDLCALL
SDL_Convert_F32LSB_to_U8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Uint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32LSB to AUDIO_U8.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Uint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Uint8 val = ((Uint8) ((SDL_SwapFloatLE(*src) + 1.0f) * 127.0f));
        *dst = val;
    }

    cvt->len_cvt /= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U8);
    }
}

static void SDLCALL
SDL_Convert_F32LSB_to_S8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32LSB to AUDIO_S8.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint8 val = ((Sint8) (SDL_SwapFloatLE(*src) * 127.0f));
        *dst = ((Sint8) val);
    }

    cvt->len_cvt /= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S8);
    }
}

static void SDLCALL
SDL_Convert_F32LSB_to_U16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32LSB to AUDIO_U16LSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Uint16 val = ((Uint16) ((SDL_SwapFloatLE(*src) + 1.0f) * 32767.0f));
        *dst = SDL_SwapLE16(val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16LSB);
    }
}

static void SDLCALL
SDL_Convert_F32LSB_to_S16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32LSB to AUDIO_S16LSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) (SDL_SwapFloatLE(*src) * 32767.0f));
        *dst = ((Sint16) SDL_SwapLE16(val));
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16LSB);
    }
}

static void SDLCALL
SDL_Convert_F32LSB_to_U16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32LSB to AUDIO_U16MSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Uint16 val = ((Uint16) ((SDL_SwapFloatLE(*src) + 1.0f) * 32767.0f));
        *dst = SDL_SwapBE16(val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16MSB);
    }
}

static void SDLCALL
SDL_Convert_F32LSB_to_S16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32LSB to AUDIO_S16MSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) (SDL_SwapFloatLE(*src) * 32767.0f));
        *dst = ((Sint16) SDL_SwapBE16(val));
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16MSB);
    }
}

static void SDLCALL
SDL_Convert_F32LSB_to_S32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32LSB to AUDIO_S32LSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint32 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint32 val = ((Sint32) (SDL_SwapFloatLE(*src) * 2147483647.0));
        *dst = ((Sint32) SDL_SwapLE32(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32LSB);
    }
}

static void SDLCALL
SDL_Convert_F32LSB_to_S32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32LSB to AUDIO_S32MSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint32 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint32 val = ((Sint32) (SDL_SwapFloatLE(*src) * 2147483647.0));
        *dst = ((Sint32) SDL_SwapBE32(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32MSB);
    }
}

static void SDLCALL
SDL_Convert_F32LSB_to_F32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32LSB to AUDIO_F32MSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (float *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const float val = SDL_SwapFloatLE(*src);
        *dst = SDL_SwapFloatBE(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32MSB);
    }
}

static void SDLCALL
SDL_Convert_F32MSB_to_U8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Uint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32MSB to AUDIO_U8.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Uint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Uint8 val = ((Uint8) ((SDL_SwapFloatBE(*src) + 1.0f) * 127.0f));
        *dst = val;
    }

    cvt->len_cvt /= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U8);
    }
}

static void SDLCALL
SDL_Convert_F32MSB_to_S8(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint8 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32MSB to AUDIO_S8.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint8 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint8 val = ((Sint8) (SDL_SwapFloatBE(*src) * 127.0f));
        *dst = ((Sint8) val);
    }

    cvt->len_cvt /= 4;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S8);
    }
}

static void SDLCALL
SDL_Convert_F32MSB_to_U16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32MSB to AUDIO_U16LSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Uint16 val = ((Uint16) ((SDL_SwapFloatBE(*src) + 1.0f) * 32767.0f));
        *dst = SDL_SwapLE16(val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16LSB);
    }
}

static void SDLCALL
SDL_Convert_F32MSB_to_S16LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32MSB to AUDIO_S16LSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) (SDL_SwapFloatBE(*src) * 32767.0f));
        *dst = ((Sint16) SDL_SwapLE16(val));
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16LSB);
    }
}

static void SDLCALL
SDL_Convert_F32MSB_to_U16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Uint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32MSB to AUDIO_U16MSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Uint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Uint16 val = ((Uint16) ((SDL_SwapFloatBE(*src) + 1.0f) * 32767.0f));
        *dst = SDL_SwapBE16(val);
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_U16MSB);
    }
}

static void SDLCALL
SDL_Convert_F32MSB_to_S16MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint16 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32MSB to AUDIO_S16MSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint16 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint16 val = ((Sint16) (SDL_SwapFloatBE(*src) * 32767.0f));
        *dst = ((Sint16) SDL_SwapBE16(val));
    }

    cvt->len_cvt /= 2;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S16MSB);
    }
}

static void SDLCALL
SDL_Convert_F32MSB_to_S32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32MSB to AUDIO_S32LSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint32 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint32 val = ((Sint32) (SDL_SwapFloatBE(*src) * 2147483647.0));
        *dst = ((Sint32) SDL_SwapLE32(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32LSB);
    }
}

static void SDLCALL
SDL_Convert_F32MSB_to_S32MSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    Sint32 *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32MSB to AUDIO_S32MSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (Sint32 *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const Sint32 val = ((Sint32) (SDL_SwapFloatBE(*src) * 2147483647.0));
        *dst = ((Sint32) SDL_SwapBE32(val));
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_S32MSB);
    }
}

static void SDLCALL
SDL_Convert_F32MSB_to_F32LSB(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
    int i;
    const float *src;
    float *dst;

#if DEBUG_CONVERT
    fprintf(stderr, "Converting AUDIO_F32MSB to AUDIO_F32LSB.\n");
#endif

    src = (const float *) cvt->buf;
    dst = (float *) cvt->buf;
    for (i = cvt->len_cvt / sizeof (float); i; --i, ++src, ++dst) {
        const float val = SDL_SwapFloatBE(*src);
        *dst = SDL_SwapFloatLE(val);
    }

    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, AUDIO_F32LSB);
    }
}

#endif  /* !NO_CONVERTERS */


const SDL_AudioTypeFilters sdl_audio_type_filters[] =
{
#if !NO_CONVERTERS
    { AUDIO_U8, AUDIO_S8, SDL_Convert_U8_to_S8 },
    { AUDIO_U8, AUDIO_U16LSB, SDL_Convert_U8_to_U16LSB },
    { AUDIO_U8, AUDIO_S16LSB, SDL_Convert_U8_to_S16LSB },
    { AUDIO_U8, AUDIO_U16MSB, SDL_Convert_U8_to_U16MSB },
    { AUDIO_U8, AUDIO_S16MSB, SDL_Convert_U8_to_S16MSB },
    { AUDIO_U8, AUDIO_S32LSB, SDL_Convert_U8_to_S32LSB },
    { AUDIO_U8, AUDIO_S32MSB, SDL_Convert_U8_to_S32MSB },
    { AUDIO_U8, AUDIO_F32LSB, SDL_Convert_U8_to_F32LSB },
    { AUDIO_U8, AUDIO_F32MSB, SDL_Convert_U8_to_F32MSB },
    { AUDIO_S8, AUDIO_U8, SDL_Convert_S8_to_U8 },
    { AUDIO_S8, AUDIO_U16LSB, SDL_Convert_S8_to_U16LSB },
    { AUDIO_S8, AUDIO_S16LSB, SDL_Convert_S8_to_S16LSB },
    { AUDIO_S8, AUDIO_U16MSB, SDL_Convert_S8_to_U16MSB },
    { AUDIO_S8, AUDIO_S16MSB, SDL_Convert_S8_to_S16MSB },
    { AUDIO_S8, AUDIO_S32LSB, SDL_Convert_S8_to_S32LSB },
    { AUDIO_S8, AUDIO_S32MSB, SDL_Convert_S8_to_S32MSB },
    { AUDIO_S8, AUDIO_F32LSB, SDL_Convert_S8_to_F32LSB },
    { AUDIO_S8, AUDIO_F32MSB, SDL_Convert_S8_to_F32MSB },
    { AUDIO_U16LSB, AUDIO_U8, SDL_Convert_U16LSB_to_U8 },
    { AUDIO_U16LSB, AUDIO_S8, SDL_Convert_U16LSB_to_S8 },
    { AUDIO_U16LSB, AUDIO_S16LSB, SDL_Convert_U16LSB_to_S16LSB },
    { AUDIO_U16LSB, AUDIO_U16MSB, SDL_Convert_U16LSB_to_U16MSB },
    { AUDIO_U16LSB, AUDIO_S16MSB, SDL_Convert_U16LSB_to_S16MSB },
    { AUDIO_U16LSB, AUDIO_S32LSB, SDL_Convert_U16LSB_to_S32LSB },
    { AUDIO_U16LSB, AUDIO_S32MSB, SDL_Convert_U16LSB_to_S32MSB },
    { AUDIO_U16LSB, AUDIO_F32LSB, SDL_Convert_U16LSB_to_F32LSB },
    { AUDIO_U16LSB, AUDIO_F32MSB, SDL_Convert_U16LSB_to_F32MSB },
    { AUDIO_S16LSB, AUDIO_U8, SDL_Convert_S16LSB_to_U8 },
    { AUDIO_S16LSB, AUDIO_S8, SDL_Convert_S16LSB_to_S8 },
    { AUDIO_S16LSB, AUDIO_U16LSB, SDL_Convert_S16LSB_to_U16LSB },
    { AUDIO_S16LSB, AUDIO_U16MSB, SDL_Convert_S16LSB_to_U16MSB },
    { AUDIO_S16LSB, AUDIO_S16MSB, SDL_Convert_S16LSB_to_S16MSB },
    { AUDIO_S16LSB, AUDIO_S32LSB, SDL_Convert_S16LSB_to_S32LSB },
    { AUDIO_S16LSB, AUDIO_S32MSB, SDL_Convert_S16LSB_to_S32MSB },
    { AUDIO_S16LSB, AUDIO_F32LSB, SDL_Convert_S16LSB_to_F32LSB },
    { AUDIO_S16LSB, AUDIO_F32MSB, SDL_Convert_S16LSB_to_F32MSB },
    { AUDIO_U16MSB, AUDIO_U8, SDL_Convert_U16MSB_to_U8 },
    { AUDIO_U16MSB, AUDIO_S8, SDL_Convert_U16MSB_to_S8 },
    { AUDIO_U16MSB, AUDIO_U16LSB, SDL_Convert_U16MSB_to_U16LSB },
    { AUDIO_U16MSB, AUDIO_S16LSB, SDL_Convert_U16MSB_to_S16LSB },
    { AUDIO_U16MSB, AUDIO_S16MSB, SDL_Convert_U16MSB_to_S16MSB },
    { AUDIO_U16MSB, AUDIO_S32LSB, SDL_Convert_U16MSB_to_S32LSB },
    { AUDIO_U16MSB, AUDIO_S32MSB, SDL_Convert_U16MSB_to_S32MSB },
    { AUDIO_U16MSB, AUDIO_F32LSB, SDL_Convert_U16MSB_to_F32LSB },
    { AUDIO_U16MSB, AUDIO_F32MSB, SDL_Convert_U16MSB_to_F32MSB },
    { AUDIO_S16MSB, AUDIO_U8, SDL_Convert_S16MSB_to_U8 },
    { AUDIO_S16MSB, AUDIO_S8, SDL_Convert_S16MSB_to_S8 },
    { AUDIO_S16MSB, AUDIO_U16LSB, SDL_Convert_S16MSB_to_U16LSB },
    { AUDIO_S16MSB, AUDIO_S16LSB, SDL_Convert_S16MSB_to_S16LSB },
    { AUDIO_S16MSB, AUDIO_U16MSB, SDL_Convert_S16MSB_to_U16MSB },
    { AUDIO_S16MSB, AUDIO_S32LSB, SDL_Convert_S16MSB_to_S32LSB },
    { AUDIO_S16MSB, AUDIO_S32MSB, SDL_Convert_S16MSB_to_S32MSB },
    { AUDIO_S16MSB, AUDIO_F32LSB, SDL_Convert_S16MSB_to_F32LSB },
    { AUDIO_S16MSB, AUDIO_F32MSB, SDL_Convert_S16MSB_to_F32MSB },
    { AUDIO_S32LSB, AUDIO_U8, SDL_Convert_S32LSB_to_U8 },
    { AUDIO_S32LSB, AUDIO_S8, SDL_Convert_S32LSB_to_S8 },
    { AUDIO_S32LSB, AUDIO_U16LSB, SDL_Convert_S32LSB_to_U16LSB },
    { AUDIO_S32LSB, AUDIO_S16LSB, SDL_Convert_S32LSB_to_S16LSB },
    { AUDIO_S32LSB, AUDIO_U16MSB, SDL_Convert_S32LSB_to_U16MSB },
    { AUDIO_S32LSB, AUDIO_S16MSB, SDL_Convert_S32LSB_to_S16MSB },
    { AUDIO_S32LSB, AUDIO_S32MSB, SDL_Convert_S32LSB_to_S32MSB },
    { AUDIO_S32LSB, AUDIO_F32LSB, SDL_Convert_S32LSB_to_F32LSB },
    { AUDIO_S32LSB, AUDIO_F32MSB, SDL_Convert_S32LSB_to_F32MSB },
    { AUDIO_S32MSB, AUDIO_U8, SDL_Convert_S32MSB_to_U8 },
    { AUDIO_S32MSB, AUDIO_S8, SDL_Convert_S32MSB_to_S8 },
    { AUDIO_S32MSB, AUDIO_U16LSB, SDL_Convert_S32MSB_to_U16LSB },
    { AUDIO_S32MSB, AUDIO_S16LSB, SDL_Convert_S32MSB_to_S16LSB },
    { AUDIO_S32MSB, AUDIO_U16MSB, SDL_Convert_S32MSB_to_U16MSB },
    { AUDIO_S32MSB, AUDIO_S16MSB, SDL_Convert_S32MSB_to_S16MSB },
    { AUDIO_S32MSB, AUDIO_S32LSB, SDL_Convert_S32MSB_to_S32LSB },
    { AUDIO_S32MSB, AUDIO_F32LSB, SDL_Convert_S32MSB_to_F32LSB },
    { AUDIO_S32MSB, AUDIO_F32MSB, SDL_Convert_S32MSB_to_F32MSB },
    { AUDIO_F32LSB, AUDIO_U8, SDL_Convert_F32LSB_to_U8 },
    { AUDIO_F32LSB, AUDIO_S8, SDL_Convert_F32LSB_to_S8 },
    { AUDIO_F32LSB, AUDIO_U16LSB, SDL_Convert_F32LSB_to_U16LSB },
    { AUDIO_F32LSB, AUDIO_S16LSB, SDL_Convert_F32LSB_to_S16LSB },
    { AUDIO_F32LSB, AUDIO_U16MSB, SDL_Convert_F32LSB_to_U16MSB },
    { AUDIO_F32LSB, AUDIO_S16MSB, SDL_Convert_F32LSB_to_S16MSB },
    { AUDIO_F32LSB, AUDIO_S32LSB, SDL_Convert_F32LSB_to_S32LSB },
    { AUDIO_F32LSB, AUDIO_S32MSB, SDL_Convert_F32LSB_to_S32MSB },
    { AUDIO_F32LSB, AUDIO_F32MSB, SDL_Convert_F32LSB_to_F32MSB },
    { AUDIO_F32MSB, AUDIO_U8, SDL_Convert_F32MSB_to_U8 },
    { AUDIO_F32MSB, AUDIO_S8, SDL_Convert_F32MSB_to_S8 },
    { AUDIO_F32MSB, AUDIO_U16LSB, SDL_Convert_F32MSB_to_U16LSB },
    { AUDIO_F32MSB, AUDIO_S16LSB, SDL_Convert_F32MSB_to_S16LSB },
    { AUDIO_F32MSB, AUDIO_U16MSB, SDL_Convert_F32MSB_to_U16MSB },
    { AUDIO_F32MSB, AUDIO_S16MSB, SDL_Convert_F32MSB_to_S16MSB },
    { AUDIO_F32MSB, AUDIO_S32LSB, SDL_Convert_F32MSB_to_S32LSB },
    { AUDIO_F32MSB, AUDIO_S32MSB, SDL_Convert_F32MSB_to_S32MSB },
    { AUDIO_F32MSB, AUDIO_F32LSB, SDL_Convert_F32MSB_to_F32LSB },
#endif  /* !NO_CONVERTERS */
    { 0, 0, NULL }
};


#if !NO_RESAMPLERS

static void SDLCALL
SDL_Upsample_U8_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U8, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 16;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 1;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 1;
    Uint8 sample0 = src[0];
    Uint8 last_sample0 = sample0;
    while (dst > target) {
        dst[0] = sample0;
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U8, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 16;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Uint8 sample0 = src[0];
    Uint8 last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = sample0;
            dst++;
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U8, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 2;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 2;
    Uint8 sample1 = src[1];
    Uint8 sample0 = src[0];
    Uint8 last_sample1 = sample1;
    Uint8 last_sample0 = sample0;
    while (dst > target) {
        dst[1] = sample1;
        dst[0] = sample0;
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (Uint8) ((((Sint16) src[1]) + ((Sint16) last_sample1)) >> 1);
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U8, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Uint8 sample0 = src[0];
    Uint8 sample1 = src[1];
    Uint8 last_sample0 = sample0;
    Uint8 last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = sample0;
            dst[1] = sample1;
            dst += 2;
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            sample1 = (Uint8) ((((Sint16) src[1]) + ((Sint16) last_sample1)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U8, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 4;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 4;
    Uint8 sample3 = src[3];
    Uint8 sample2 = src[2];
    Uint8 sample1 = src[1];
    Uint8 sample0 = src[0];
    Uint8 last_sample3 = sample3;
    Uint8 last_sample2 = sample2;
    Uint8 last_sample1 = sample1;
    Uint8 last_sample0 = sample0;
    while (dst > target) {
        dst[3] = sample3;
        dst[2] = sample2;
        dst[1] = sample1;
        dst[0] = sample0;
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (Uint8) ((((Sint16) src[3]) + ((Sint16) last_sample3)) >> 1);
            sample2 = (Uint8) ((((Sint16) src[2]) + ((Sint16) last_sample2)) >> 1);
            sample1 = (Uint8) ((((Sint16) src[1]) + ((Sint16) last_sample1)) >> 1);
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U8, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Uint8 sample0 = src[0];
    Uint8 sample1 = src[1];
    Uint8 sample2 = src[2];
    Uint8 sample3 = src[3];
    Uint8 last_sample0 = sample0;
    Uint8 last_sample1 = sample1;
    Uint8 last_sample2 = sample2;
    Uint8 last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = sample0;
            dst[1] = sample1;
            dst[2] = sample2;
            dst[3] = sample3;
            dst += 4;
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            sample1 = (Uint8) ((((Sint16) src[1]) + ((Sint16) last_sample1)) >> 1);
            sample2 = (Uint8) ((((Sint16) src[2]) + ((Sint16) last_sample2)) >> 1);
            sample3 = (Uint8) ((((Sint16) src[3]) + ((Sint16) last_sample3)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U8, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 96;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 6;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 6;
    Uint8 sample5 = src[5];
    Uint8 sample4 = src[4];
    Uint8 sample3 = src[3];
    Uint8 sample2 = src[2];
    Uint8 sample1 = src[1];
    Uint8 sample0 = src[0];
    Uint8 last_sample5 = sample5;
    Uint8 last_sample4 = sample4;
    Uint8 last_sample3 = sample3;
    Uint8 last_sample2 = sample2;
    Uint8 last_sample1 = sample1;
    Uint8 last_sample0 = sample0;
    while (dst > target) {
        dst[5] = sample5;
        dst[4] = sample4;
        dst[3] = sample3;
        dst[2] = sample2;
        dst[1] = sample1;
        dst[0] = sample0;
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (Uint8) ((((Sint16) src[5]) + ((Sint16) last_sample5)) >> 1);
            sample4 = (Uint8) ((((Sint16) src[4]) + ((Sint16) last_sample4)) >> 1);
            sample3 = (Uint8) ((((Sint16) src[3]) + ((Sint16) last_sample3)) >> 1);
            sample2 = (Uint8) ((((Sint16) src[2]) + ((Sint16) last_sample2)) >> 1);
            sample1 = (Uint8) ((((Sint16) src[1]) + ((Sint16) last_sample1)) >> 1);
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U8, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 96;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Uint8 sample0 = src[0];
    Uint8 sample1 = src[1];
    Uint8 sample2 = src[2];
    Uint8 sample3 = src[3];
    Uint8 sample4 = src[4];
    Uint8 sample5 = src[5];
    Uint8 last_sample0 = sample0;
    Uint8 last_sample1 = sample1;
    Uint8 last_sample2 = sample2;
    Uint8 last_sample3 = sample3;
    Uint8 last_sample4 = sample4;
    Uint8 last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = sample0;
            dst[1] = sample1;
            dst[2] = sample2;
            dst[3] = sample3;
            dst[4] = sample4;
            dst[5] = sample5;
            dst += 6;
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            sample1 = (Uint8) ((((Sint16) src[1]) + ((Sint16) last_sample1)) >> 1);
            sample2 = (Uint8) ((((Sint16) src[2]) + ((Sint16) last_sample2)) >> 1);
            sample3 = (Uint8) ((((Sint16) src[3]) + ((Sint16) last_sample3)) >> 1);
            sample4 = (Uint8) ((((Sint16) src[4]) + ((Sint16) last_sample4)) >> 1);
            sample5 = (Uint8) ((((Sint16) src[5]) + ((Sint16) last_sample5)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U8, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 8;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 8;
    Uint8 sample7 = src[7];
    Uint8 sample6 = src[6];
    Uint8 sample5 = src[5];
    Uint8 sample4 = src[4];
    Uint8 sample3 = src[3];
    Uint8 sample2 = src[2];
    Uint8 sample1 = src[1];
    Uint8 sample0 = src[0];
    Uint8 last_sample7 = sample7;
    Uint8 last_sample6 = sample6;
    Uint8 last_sample5 = sample5;
    Uint8 last_sample4 = sample4;
    Uint8 last_sample3 = sample3;
    Uint8 last_sample2 = sample2;
    Uint8 last_sample1 = sample1;
    Uint8 last_sample0 = sample0;
    while (dst > target) {
        dst[7] = sample7;
        dst[6] = sample6;
        dst[5] = sample5;
        dst[4] = sample4;
        dst[3] = sample3;
        dst[2] = sample2;
        dst[1] = sample1;
        dst[0] = sample0;
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (Uint8) ((((Sint16) src[7]) + ((Sint16) last_sample7)) >> 1);
            sample6 = (Uint8) ((((Sint16) src[6]) + ((Sint16) last_sample6)) >> 1);
            sample5 = (Uint8) ((((Sint16) src[5]) + ((Sint16) last_sample5)) >> 1);
            sample4 = (Uint8) ((((Sint16) src[4]) + ((Sint16) last_sample4)) >> 1);
            sample3 = (Uint8) ((((Sint16) src[3]) + ((Sint16) last_sample3)) >> 1);
            sample2 = (Uint8) ((((Sint16) src[2]) + ((Sint16) last_sample2)) >> 1);
            sample1 = (Uint8) ((((Sint16) src[1]) + ((Sint16) last_sample1)) >> 1);
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U8, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Uint8 sample0 = src[0];
    Uint8 sample1 = src[1];
    Uint8 sample2 = src[2];
    Uint8 sample3 = src[3];
    Uint8 sample4 = src[4];
    Uint8 sample5 = src[5];
    Uint8 sample6 = src[6];
    Uint8 sample7 = src[7];
    Uint8 last_sample0 = sample0;
    Uint8 last_sample1 = sample1;
    Uint8 last_sample2 = sample2;
    Uint8 last_sample3 = sample3;
    Uint8 last_sample4 = sample4;
    Uint8 last_sample5 = sample5;
    Uint8 last_sample6 = sample6;
    Uint8 last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = sample0;
            dst[1] = sample1;
            dst[2] = sample2;
            dst[3] = sample3;
            dst[4] = sample4;
            dst[5] = sample5;
            dst[6] = sample6;
            dst[7] = sample7;
            dst += 8;
            sample0 = (Uint8) ((((Sint16) src[0]) + ((Sint16) last_sample0)) >> 1);
            sample1 = (Uint8) ((((Sint16) src[1]) + ((Sint16) last_sample1)) >> 1);
            sample2 = (Uint8) ((((Sint16) src[2]) + ((Sint16) last_sample2)) >> 1);
            sample3 = (Uint8) ((((Sint16) src[3]) + ((Sint16) last_sample3)) >> 1);
            sample4 = (Uint8) ((((Sint16) src[4]) + ((Sint16) last_sample4)) >> 1);
            sample5 = (Uint8) ((((Sint16) src[5]) + ((Sint16) last_sample5)) >> 1);
            sample6 = (Uint8) ((((Sint16) src[6]) + ((Sint16) last_sample6)) >> 1);
            sample7 = (Uint8) ((((Sint16) src[7]) + ((Sint16) last_sample7)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S8, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 16;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 1;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 1;
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 last_sample0 = sample0;
    while (dst > target) {
        dst[0] = ((Sint8) sample0);
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S8, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 16;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint8) sample0);
            dst++;
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S8, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 2;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 2;
    Sint8 sample1 = ((Sint8) src[1]);
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 last_sample1 = sample1;
    Sint8 last_sample0 = sample0;
    while (dst > target) {
        dst[1] = ((Sint8) sample1);
        dst[0] = ((Sint8) sample0);
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (Sint8) ((((Sint16) ((Sint8) src[1])) + ((Sint16) last_sample1)) >> 1);
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S8, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 sample1 = ((Sint8) src[1]);
    Sint8 last_sample0 = sample0;
    Sint8 last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint8) sample0);
            dst[1] = ((Sint8) sample1);
            dst += 2;
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            sample1 = (Sint8) ((((Sint16) ((Sint8) src[1])) + ((Sint16) last_sample1)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S8, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 4;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 4;
    Sint8 sample3 = ((Sint8) src[3]);
    Sint8 sample2 = ((Sint8) src[2]);
    Sint8 sample1 = ((Sint8) src[1]);
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 last_sample3 = sample3;
    Sint8 last_sample2 = sample2;
    Sint8 last_sample1 = sample1;
    Sint8 last_sample0 = sample0;
    while (dst > target) {
        dst[3] = ((Sint8) sample3);
        dst[2] = ((Sint8) sample2);
        dst[1] = ((Sint8) sample1);
        dst[0] = ((Sint8) sample0);
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (Sint8) ((((Sint16) ((Sint8) src[3])) + ((Sint16) last_sample3)) >> 1);
            sample2 = (Sint8) ((((Sint16) ((Sint8) src[2])) + ((Sint16) last_sample2)) >> 1);
            sample1 = (Sint8) ((((Sint16) ((Sint8) src[1])) + ((Sint16) last_sample1)) >> 1);
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S8, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 sample1 = ((Sint8) src[1]);
    Sint8 sample2 = ((Sint8) src[2]);
    Sint8 sample3 = ((Sint8) src[3]);
    Sint8 last_sample0 = sample0;
    Sint8 last_sample1 = sample1;
    Sint8 last_sample2 = sample2;
    Sint8 last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint8) sample0);
            dst[1] = ((Sint8) sample1);
            dst[2] = ((Sint8) sample2);
            dst[3] = ((Sint8) sample3);
            dst += 4;
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            sample1 = (Sint8) ((((Sint16) ((Sint8) src[1])) + ((Sint16) last_sample1)) >> 1);
            sample2 = (Sint8) ((((Sint16) ((Sint8) src[2])) + ((Sint16) last_sample2)) >> 1);
            sample3 = (Sint8) ((((Sint16) ((Sint8) src[3])) + ((Sint16) last_sample3)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S8, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 96;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 6;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 6;
    Sint8 sample5 = ((Sint8) src[5]);
    Sint8 sample4 = ((Sint8) src[4]);
    Sint8 sample3 = ((Sint8) src[3]);
    Sint8 sample2 = ((Sint8) src[2]);
    Sint8 sample1 = ((Sint8) src[1]);
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 last_sample5 = sample5;
    Sint8 last_sample4 = sample4;
    Sint8 last_sample3 = sample3;
    Sint8 last_sample2 = sample2;
    Sint8 last_sample1 = sample1;
    Sint8 last_sample0 = sample0;
    while (dst > target) {
        dst[5] = ((Sint8) sample5);
        dst[4] = ((Sint8) sample4);
        dst[3] = ((Sint8) sample3);
        dst[2] = ((Sint8) sample2);
        dst[1] = ((Sint8) sample1);
        dst[0] = ((Sint8) sample0);
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (Sint8) ((((Sint16) ((Sint8) src[5])) + ((Sint16) last_sample5)) >> 1);
            sample4 = (Sint8) ((((Sint16) ((Sint8) src[4])) + ((Sint16) last_sample4)) >> 1);
            sample3 = (Sint8) ((((Sint16) ((Sint8) src[3])) + ((Sint16) last_sample3)) >> 1);
            sample2 = (Sint8) ((((Sint16) ((Sint8) src[2])) + ((Sint16) last_sample2)) >> 1);
            sample1 = (Sint8) ((((Sint16) ((Sint8) src[1])) + ((Sint16) last_sample1)) >> 1);
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S8, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 96;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 sample1 = ((Sint8) src[1]);
    Sint8 sample2 = ((Sint8) src[2]);
    Sint8 sample3 = ((Sint8) src[3]);
    Sint8 sample4 = ((Sint8) src[4]);
    Sint8 sample5 = ((Sint8) src[5]);
    Sint8 last_sample0 = sample0;
    Sint8 last_sample1 = sample1;
    Sint8 last_sample2 = sample2;
    Sint8 last_sample3 = sample3;
    Sint8 last_sample4 = sample4;
    Sint8 last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint8) sample0);
            dst[1] = ((Sint8) sample1);
            dst[2] = ((Sint8) sample2);
            dst[3] = ((Sint8) sample3);
            dst[4] = ((Sint8) sample4);
            dst[5] = ((Sint8) sample5);
            dst += 6;
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            sample1 = (Sint8) ((((Sint16) ((Sint8) src[1])) + ((Sint16) last_sample1)) >> 1);
            sample2 = (Sint8) ((((Sint16) ((Sint8) src[2])) + ((Sint16) last_sample2)) >> 1);
            sample3 = (Sint8) ((((Sint16) ((Sint8) src[3])) + ((Sint16) last_sample3)) >> 1);
            sample4 = (Sint8) ((((Sint16) ((Sint8) src[4])) + ((Sint16) last_sample4)) >> 1);
            sample5 = (Sint8) ((((Sint16) ((Sint8) src[5])) + ((Sint16) last_sample5)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S8, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 8;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 8;
    Sint8 sample7 = ((Sint8) src[7]);
    Sint8 sample6 = ((Sint8) src[6]);
    Sint8 sample5 = ((Sint8) src[5]);
    Sint8 sample4 = ((Sint8) src[4]);
    Sint8 sample3 = ((Sint8) src[3]);
    Sint8 sample2 = ((Sint8) src[2]);
    Sint8 sample1 = ((Sint8) src[1]);
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 last_sample7 = sample7;
    Sint8 last_sample6 = sample6;
    Sint8 last_sample5 = sample5;
    Sint8 last_sample4 = sample4;
    Sint8 last_sample3 = sample3;
    Sint8 last_sample2 = sample2;
    Sint8 last_sample1 = sample1;
    Sint8 last_sample0 = sample0;
    while (dst > target) {
        dst[7] = ((Sint8) sample7);
        dst[6] = ((Sint8) sample6);
        dst[5] = ((Sint8) sample5);
        dst[4] = ((Sint8) sample4);
        dst[3] = ((Sint8) sample3);
        dst[2] = ((Sint8) sample2);
        dst[1] = ((Sint8) sample1);
        dst[0] = ((Sint8) sample0);
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (Sint8) ((((Sint16) ((Sint8) src[7])) + ((Sint16) last_sample7)) >> 1);
            sample6 = (Sint8) ((((Sint16) ((Sint8) src[6])) + ((Sint16) last_sample6)) >> 1);
            sample5 = (Sint8) ((((Sint16) ((Sint8) src[5])) + ((Sint16) last_sample5)) >> 1);
            sample4 = (Sint8) ((((Sint16) ((Sint8) src[4])) + ((Sint16) last_sample4)) >> 1);
            sample3 = (Sint8) ((((Sint16) ((Sint8) src[3])) + ((Sint16) last_sample3)) >> 1);
            sample2 = (Sint8) ((((Sint16) ((Sint8) src[2])) + ((Sint16) last_sample2)) >> 1);
            sample1 = (Sint8) ((((Sint16) ((Sint8) src[1])) + ((Sint16) last_sample1)) >> 1);
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S8, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint8 sample0 = ((Sint8) src[0]);
    Sint8 sample1 = ((Sint8) src[1]);
    Sint8 sample2 = ((Sint8) src[2]);
    Sint8 sample3 = ((Sint8) src[3]);
    Sint8 sample4 = ((Sint8) src[4]);
    Sint8 sample5 = ((Sint8) src[5]);
    Sint8 sample6 = ((Sint8) src[6]);
    Sint8 sample7 = ((Sint8) src[7]);
    Sint8 last_sample0 = sample0;
    Sint8 last_sample1 = sample1;
    Sint8 last_sample2 = sample2;
    Sint8 last_sample3 = sample3;
    Sint8 last_sample4 = sample4;
    Sint8 last_sample5 = sample5;
    Sint8 last_sample6 = sample6;
    Sint8 last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint8) sample0);
            dst[1] = ((Sint8) sample1);
            dst[2] = ((Sint8) sample2);
            dst[3] = ((Sint8) sample3);
            dst[4] = ((Sint8) sample4);
            dst[5] = ((Sint8) sample5);
            dst[6] = ((Sint8) sample6);
            dst[7] = ((Sint8) sample7);
            dst += 8;
            sample0 = (Sint8) ((((Sint16) ((Sint8) src[0])) + ((Sint16) last_sample0)) >> 1);
            sample1 = (Sint8) ((((Sint16) ((Sint8) src[1])) + ((Sint16) last_sample1)) >> 1);
            sample2 = (Sint8) ((((Sint16) ((Sint8) src[2])) + ((Sint16) last_sample2)) >> 1);
            sample3 = (Sint8) ((((Sint16) ((Sint8) src[3])) + ((Sint16) last_sample3)) >> 1);
            sample4 = (Sint8) ((((Sint16) ((Sint8) src[4])) + ((Sint16) last_sample4)) >> 1);
            sample5 = (Sint8) ((((Sint16) ((Sint8) src[5])) + ((Sint16) last_sample5)) >> 1);
            sample6 = (Sint8) ((((Sint16) ((Sint8) src[6])) + ((Sint16) last_sample6)) >> 1);
            sample7 = (Sint8) ((((Sint16) ((Sint8) src[7])) + ((Sint16) last_sample7)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16LSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 1;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 1;
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[0] = SDL_SwapLE16(sample0);
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16LSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapLE16(sample0);
            dst++;
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16LSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 2;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 2;
    Uint16 sample1 = SDL_SwapLE16(src[1]);
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 last_sample1 = sample1;
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[1] = SDL_SwapLE16(sample1);
        dst[0] = SDL_SwapLE16(sample0);
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (Uint16) ((((Sint32) SDL_SwapLE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16LSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 sample1 = SDL_SwapLE16(src[1]);
    Uint16 last_sample0 = sample0;
    Uint16 last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapLE16(sample0);
            dst[1] = SDL_SwapLE16(sample1);
            dst += 2;
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapLE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16LSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 4;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 4;
    Uint16 sample3 = SDL_SwapLE16(src[3]);
    Uint16 sample2 = SDL_SwapLE16(src[2]);
    Uint16 sample1 = SDL_SwapLE16(src[1]);
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 last_sample3 = sample3;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[3] = SDL_SwapLE16(sample3);
        dst[2] = SDL_SwapLE16(sample2);
        dst[1] = SDL_SwapLE16(sample1);
        dst[0] = SDL_SwapLE16(sample0);
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (Uint16) ((((Sint32) SDL_SwapLE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapLE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapLE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16LSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 sample1 = SDL_SwapLE16(src[1]);
    Uint16 sample2 = SDL_SwapLE16(src[2]);
    Uint16 sample3 = SDL_SwapLE16(src[3]);
    Uint16 last_sample0 = sample0;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapLE16(sample0);
            dst[1] = SDL_SwapLE16(sample1);
            dst[2] = SDL_SwapLE16(sample2);
            dst[3] = SDL_SwapLE16(sample3);
            dst += 4;
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapLE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapLE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapLE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16LSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 192;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 6;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 6;
    Uint16 sample5 = SDL_SwapLE16(src[5]);
    Uint16 sample4 = SDL_SwapLE16(src[4]);
    Uint16 sample3 = SDL_SwapLE16(src[3]);
    Uint16 sample2 = SDL_SwapLE16(src[2]);
    Uint16 sample1 = SDL_SwapLE16(src[1]);
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 last_sample5 = sample5;
    Uint16 last_sample4 = sample4;
    Uint16 last_sample3 = sample3;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[5] = SDL_SwapLE16(sample5);
        dst[4] = SDL_SwapLE16(sample4);
        dst[3] = SDL_SwapLE16(sample3);
        dst[2] = SDL_SwapLE16(sample2);
        dst[1] = SDL_SwapLE16(sample1);
        dst[0] = SDL_SwapLE16(sample0);
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (Uint16) ((((Sint32) SDL_SwapLE16(src[5])) + ((Sint32) last_sample5)) >> 1);
            sample4 = (Uint16) ((((Sint32) SDL_SwapLE16(src[4])) + ((Sint32) last_sample4)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapLE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapLE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapLE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16LSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 192;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 sample1 = SDL_SwapLE16(src[1]);
    Uint16 sample2 = SDL_SwapLE16(src[2]);
    Uint16 sample3 = SDL_SwapLE16(src[3]);
    Uint16 sample4 = SDL_SwapLE16(src[4]);
    Uint16 sample5 = SDL_SwapLE16(src[5]);
    Uint16 last_sample0 = sample0;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample3 = sample3;
    Uint16 last_sample4 = sample4;
    Uint16 last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapLE16(sample0);
            dst[1] = SDL_SwapLE16(sample1);
            dst[2] = SDL_SwapLE16(sample2);
            dst[3] = SDL_SwapLE16(sample3);
            dst[4] = SDL_SwapLE16(sample4);
            dst[5] = SDL_SwapLE16(sample5);
            dst += 6;
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapLE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapLE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapLE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample4 = (Uint16) ((((Sint32) SDL_SwapLE16(src[4])) + ((Sint32) last_sample4)) >> 1);
            sample5 = (Uint16) ((((Sint32) SDL_SwapLE16(src[5])) + ((Sint32) last_sample5)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16LSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 8;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 8;
    Uint16 sample7 = SDL_SwapLE16(src[7]);
    Uint16 sample6 = SDL_SwapLE16(src[6]);
    Uint16 sample5 = SDL_SwapLE16(src[5]);
    Uint16 sample4 = SDL_SwapLE16(src[4]);
    Uint16 sample3 = SDL_SwapLE16(src[3]);
    Uint16 sample2 = SDL_SwapLE16(src[2]);
    Uint16 sample1 = SDL_SwapLE16(src[1]);
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 last_sample7 = sample7;
    Uint16 last_sample6 = sample6;
    Uint16 last_sample5 = sample5;
    Uint16 last_sample4 = sample4;
    Uint16 last_sample3 = sample3;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[7] = SDL_SwapLE16(sample7);
        dst[6] = SDL_SwapLE16(sample6);
        dst[5] = SDL_SwapLE16(sample5);
        dst[4] = SDL_SwapLE16(sample4);
        dst[3] = SDL_SwapLE16(sample3);
        dst[2] = SDL_SwapLE16(sample2);
        dst[1] = SDL_SwapLE16(sample1);
        dst[0] = SDL_SwapLE16(sample0);
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (Uint16) ((((Sint32) SDL_SwapLE16(src[7])) + ((Sint32) last_sample7)) >> 1);
            sample6 = (Uint16) ((((Sint32) SDL_SwapLE16(src[6])) + ((Sint32) last_sample6)) >> 1);
            sample5 = (Uint16) ((((Sint32) SDL_SwapLE16(src[5])) + ((Sint32) last_sample5)) >> 1);
            sample4 = (Uint16) ((((Sint32) SDL_SwapLE16(src[4])) + ((Sint32) last_sample4)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapLE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapLE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapLE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16LSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapLE16(src[0]);
    Uint16 sample1 = SDL_SwapLE16(src[1]);
    Uint16 sample2 = SDL_SwapLE16(src[2]);
    Uint16 sample3 = SDL_SwapLE16(src[3]);
    Uint16 sample4 = SDL_SwapLE16(src[4]);
    Uint16 sample5 = SDL_SwapLE16(src[5]);
    Uint16 sample6 = SDL_SwapLE16(src[6]);
    Uint16 sample7 = SDL_SwapLE16(src[7]);
    Uint16 last_sample0 = sample0;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample3 = sample3;
    Uint16 last_sample4 = sample4;
    Uint16 last_sample5 = sample5;
    Uint16 last_sample6 = sample6;
    Uint16 last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapLE16(sample0);
            dst[1] = SDL_SwapLE16(sample1);
            dst[2] = SDL_SwapLE16(sample2);
            dst[3] = SDL_SwapLE16(sample3);
            dst[4] = SDL_SwapLE16(sample4);
            dst[5] = SDL_SwapLE16(sample5);
            dst[6] = SDL_SwapLE16(sample6);
            dst[7] = SDL_SwapLE16(sample7);
            dst += 8;
            sample0 = (Uint16) ((((Sint32) SDL_SwapLE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapLE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapLE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapLE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample4 = (Uint16) ((((Sint32) SDL_SwapLE16(src[4])) + ((Sint32) last_sample4)) >> 1);
            sample5 = (Uint16) ((((Sint32) SDL_SwapLE16(src[5])) + ((Sint32) last_sample5)) >> 1);
            sample6 = (Uint16) ((((Sint32) SDL_SwapLE16(src[6])) + ((Sint32) last_sample6)) >> 1);
            sample7 = (Uint16) ((((Sint32) SDL_SwapLE16(src[7])) + ((Sint32) last_sample7)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16LSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 1;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 1;
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[0] = ((Sint16) SDL_SwapLE16(sample0));
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16LSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapLE16(sample0));
            dst++;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16LSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 2;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 2;
    Sint16 sample1 = ((Sint16) SDL_SwapLE16(src[1]));
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 last_sample1 = sample1;
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[1] = ((Sint16) SDL_SwapLE16(sample1));
        dst[0] = ((Sint16) SDL_SwapLE16(sample0));
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16LSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 sample1 = ((Sint16) SDL_SwapLE16(src[1]));
    Sint16 last_sample0 = sample0;
    Sint16 last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapLE16(sample0));
            dst[1] = ((Sint16) SDL_SwapLE16(sample1));
            dst += 2;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16LSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 4;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 4;
    Sint16 sample3 = ((Sint16) SDL_SwapLE16(src[3]));
    Sint16 sample2 = ((Sint16) SDL_SwapLE16(src[2]));
    Sint16 sample1 = ((Sint16) SDL_SwapLE16(src[1]));
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 last_sample3 = sample3;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[3] = ((Sint16) SDL_SwapLE16(sample3));
        dst[2] = ((Sint16) SDL_SwapLE16(sample2));
        dst[1] = ((Sint16) SDL_SwapLE16(sample1));
        dst[0] = ((Sint16) SDL_SwapLE16(sample0));
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16LSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 sample1 = ((Sint16) SDL_SwapLE16(src[1]));
    Sint16 sample2 = ((Sint16) SDL_SwapLE16(src[2]));
    Sint16 sample3 = ((Sint16) SDL_SwapLE16(src[3]));
    Sint16 last_sample0 = sample0;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapLE16(sample0));
            dst[1] = ((Sint16) SDL_SwapLE16(sample1));
            dst[2] = ((Sint16) SDL_SwapLE16(sample2));
            dst[3] = ((Sint16) SDL_SwapLE16(sample3));
            dst += 4;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16LSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 192;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 6;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 6;
    Sint16 sample5 = ((Sint16) SDL_SwapLE16(src[5]));
    Sint16 sample4 = ((Sint16) SDL_SwapLE16(src[4]));
    Sint16 sample3 = ((Sint16) SDL_SwapLE16(src[3]));
    Sint16 sample2 = ((Sint16) SDL_SwapLE16(src[2]));
    Sint16 sample1 = ((Sint16) SDL_SwapLE16(src[1]));
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 last_sample5 = sample5;
    Sint16 last_sample4 = sample4;
    Sint16 last_sample3 = sample3;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[5] = ((Sint16) SDL_SwapLE16(sample5));
        dst[4] = ((Sint16) SDL_SwapLE16(sample4));
        dst[3] = ((Sint16) SDL_SwapLE16(sample3));
        dst[2] = ((Sint16) SDL_SwapLE16(sample2));
        dst[1] = ((Sint16) SDL_SwapLE16(sample1));
        dst[0] = ((Sint16) SDL_SwapLE16(sample0));
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[5]))) + ((Sint32) last_sample5)) >> 1);
            sample4 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[4]))) + ((Sint32) last_sample4)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16LSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 192;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 sample1 = ((Sint16) SDL_SwapLE16(src[1]));
    Sint16 sample2 = ((Sint16) SDL_SwapLE16(src[2]));
    Sint16 sample3 = ((Sint16) SDL_SwapLE16(src[3]));
    Sint16 sample4 = ((Sint16) SDL_SwapLE16(src[4]));
    Sint16 sample5 = ((Sint16) SDL_SwapLE16(src[5]));
    Sint16 last_sample0 = sample0;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample3 = sample3;
    Sint16 last_sample4 = sample4;
    Sint16 last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapLE16(sample0));
            dst[1] = ((Sint16) SDL_SwapLE16(sample1));
            dst[2] = ((Sint16) SDL_SwapLE16(sample2));
            dst[3] = ((Sint16) SDL_SwapLE16(sample3));
            dst[4] = ((Sint16) SDL_SwapLE16(sample4));
            dst[5] = ((Sint16) SDL_SwapLE16(sample5));
            dst += 6;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample4 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[4]))) + ((Sint32) last_sample4)) >> 1);
            sample5 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[5]))) + ((Sint32) last_sample5)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16LSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 8;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 8;
    Sint16 sample7 = ((Sint16) SDL_SwapLE16(src[7]));
    Sint16 sample6 = ((Sint16) SDL_SwapLE16(src[6]));
    Sint16 sample5 = ((Sint16) SDL_SwapLE16(src[5]));
    Sint16 sample4 = ((Sint16) SDL_SwapLE16(src[4]));
    Sint16 sample3 = ((Sint16) SDL_SwapLE16(src[3]));
    Sint16 sample2 = ((Sint16) SDL_SwapLE16(src[2]));
    Sint16 sample1 = ((Sint16) SDL_SwapLE16(src[1]));
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 last_sample7 = sample7;
    Sint16 last_sample6 = sample6;
    Sint16 last_sample5 = sample5;
    Sint16 last_sample4 = sample4;
    Sint16 last_sample3 = sample3;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[7] = ((Sint16) SDL_SwapLE16(sample7));
        dst[6] = ((Sint16) SDL_SwapLE16(sample6));
        dst[5] = ((Sint16) SDL_SwapLE16(sample5));
        dst[4] = ((Sint16) SDL_SwapLE16(sample4));
        dst[3] = ((Sint16) SDL_SwapLE16(sample3));
        dst[2] = ((Sint16) SDL_SwapLE16(sample2));
        dst[1] = ((Sint16) SDL_SwapLE16(sample1));
        dst[0] = ((Sint16) SDL_SwapLE16(sample0));
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[7]))) + ((Sint32) last_sample7)) >> 1);
            sample6 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[6]))) + ((Sint32) last_sample6)) >> 1);
            sample5 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[5]))) + ((Sint32) last_sample5)) >> 1);
            sample4 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[4]))) + ((Sint32) last_sample4)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16LSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapLE16(src[0]));
    Sint16 sample1 = ((Sint16) SDL_SwapLE16(src[1]));
    Sint16 sample2 = ((Sint16) SDL_SwapLE16(src[2]));
    Sint16 sample3 = ((Sint16) SDL_SwapLE16(src[3]));
    Sint16 sample4 = ((Sint16) SDL_SwapLE16(src[4]));
    Sint16 sample5 = ((Sint16) SDL_SwapLE16(src[5]));
    Sint16 sample6 = ((Sint16) SDL_SwapLE16(src[6]));
    Sint16 sample7 = ((Sint16) SDL_SwapLE16(src[7]));
    Sint16 last_sample0 = sample0;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample3 = sample3;
    Sint16 last_sample4 = sample4;
    Sint16 last_sample5 = sample5;
    Sint16 last_sample6 = sample6;
    Sint16 last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapLE16(sample0));
            dst[1] = ((Sint16) SDL_SwapLE16(sample1));
            dst[2] = ((Sint16) SDL_SwapLE16(sample2));
            dst[3] = ((Sint16) SDL_SwapLE16(sample3));
            dst[4] = ((Sint16) SDL_SwapLE16(sample4));
            dst[5] = ((Sint16) SDL_SwapLE16(sample5));
            dst[6] = ((Sint16) SDL_SwapLE16(sample6));
            dst[7] = ((Sint16) SDL_SwapLE16(sample7));
            dst += 8;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample4 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[4]))) + ((Sint32) last_sample4)) >> 1);
            sample5 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[5]))) + ((Sint32) last_sample5)) >> 1);
            sample6 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[6]))) + ((Sint32) last_sample6)) >> 1);
            sample7 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapLE16(src[7]))) + ((Sint32) last_sample7)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16MSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 1;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 1;
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[0] = SDL_SwapBE16(sample0);
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16MSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapBE16(sample0);
            dst++;
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16MSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 2;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 2;
    Uint16 sample1 = SDL_SwapBE16(src[1]);
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 last_sample1 = sample1;
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[1] = SDL_SwapBE16(sample1);
        dst[0] = SDL_SwapBE16(sample0);
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (Uint16) ((((Sint32) SDL_SwapBE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16MSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 sample1 = SDL_SwapBE16(src[1]);
    Uint16 last_sample0 = sample0;
    Uint16 last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapBE16(sample0);
            dst[1] = SDL_SwapBE16(sample1);
            dst += 2;
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapBE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16MSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 4;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 4;
    Uint16 sample3 = SDL_SwapBE16(src[3]);
    Uint16 sample2 = SDL_SwapBE16(src[2]);
    Uint16 sample1 = SDL_SwapBE16(src[1]);
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 last_sample3 = sample3;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[3] = SDL_SwapBE16(sample3);
        dst[2] = SDL_SwapBE16(sample2);
        dst[1] = SDL_SwapBE16(sample1);
        dst[0] = SDL_SwapBE16(sample0);
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (Uint16) ((((Sint32) SDL_SwapBE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapBE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapBE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16MSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 sample1 = SDL_SwapBE16(src[1]);
    Uint16 sample2 = SDL_SwapBE16(src[2]);
    Uint16 sample3 = SDL_SwapBE16(src[3]);
    Uint16 last_sample0 = sample0;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapBE16(sample0);
            dst[1] = SDL_SwapBE16(sample1);
            dst[2] = SDL_SwapBE16(sample2);
            dst[3] = SDL_SwapBE16(sample3);
            dst += 4;
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapBE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapBE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapBE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16MSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 192;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 6;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 6;
    Uint16 sample5 = SDL_SwapBE16(src[5]);
    Uint16 sample4 = SDL_SwapBE16(src[4]);
    Uint16 sample3 = SDL_SwapBE16(src[3]);
    Uint16 sample2 = SDL_SwapBE16(src[2]);
    Uint16 sample1 = SDL_SwapBE16(src[1]);
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 last_sample5 = sample5;
    Uint16 last_sample4 = sample4;
    Uint16 last_sample3 = sample3;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[5] = SDL_SwapBE16(sample5);
        dst[4] = SDL_SwapBE16(sample4);
        dst[3] = SDL_SwapBE16(sample3);
        dst[2] = SDL_SwapBE16(sample2);
        dst[1] = SDL_SwapBE16(sample1);
        dst[0] = SDL_SwapBE16(sample0);
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (Uint16) ((((Sint32) SDL_SwapBE16(src[5])) + ((Sint32) last_sample5)) >> 1);
            sample4 = (Uint16) ((((Sint32) SDL_SwapBE16(src[4])) + ((Sint32) last_sample4)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapBE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapBE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapBE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16MSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 192;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 sample1 = SDL_SwapBE16(src[1]);
    Uint16 sample2 = SDL_SwapBE16(src[2]);
    Uint16 sample3 = SDL_SwapBE16(src[3]);
    Uint16 sample4 = SDL_SwapBE16(src[4]);
    Uint16 sample5 = SDL_SwapBE16(src[5]);
    Uint16 last_sample0 = sample0;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample3 = sample3;
    Uint16 last_sample4 = sample4;
    Uint16 last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapBE16(sample0);
            dst[1] = SDL_SwapBE16(sample1);
            dst[2] = SDL_SwapBE16(sample2);
            dst[3] = SDL_SwapBE16(sample3);
            dst[4] = SDL_SwapBE16(sample4);
            dst[5] = SDL_SwapBE16(sample5);
            dst += 6;
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapBE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapBE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapBE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample4 = (Uint16) ((((Sint32) SDL_SwapBE16(src[4])) + ((Sint32) last_sample4)) >> 1);
            sample5 = (Uint16) ((((Sint32) SDL_SwapBE16(src[5])) + ((Sint32) last_sample5)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_U16MSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 8;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 8;
    Uint16 sample7 = SDL_SwapBE16(src[7]);
    Uint16 sample6 = SDL_SwapBE16(src[6]);
    Uint16 sample5 = SDL_SwapBE16(src[5]);
    Uint16 sample4 = SDL_SwapBE16(src[4]);
    Uint16 sample3 = SDL_SwapBE16(src[3]);
    Uint16 sample2 = SDL_SwapBE16(src[2]);
    Uint16 sample1 = SDL_SwapBE16(src[1]);
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 last_sample7 = sample7;
    Uint16 last_sample6 = sample6;
    Uint16 last_sample5 = sample5;
    Uint16 last_sample4 = sample4;
    Uint16 last_sample3 = sample3;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample0 = sample0;
    while (dst > target) {
        dst[7] = SDL_SwapBE16(sample7);
        dst[6] = SDL_SwapBE16(sample6);
        dst[5] = SDL_SwapBE16(sample5);
        dst[4] = SDL_SwapBE16(sample4);
        dst[3] = SDL_SwapBE16(sample3);
        dst[2] = SDL_SwapBE16(sample2);
        dst[1] = SDL_SwapBE16(sample1);
        dst[0] = SDL_SwapBE16(sample0);
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (Uint16) ((((Sint32) SDL_SwapBE16(src[7])) + ((Sint32) last_sample7)) >> 1);
            sample6 = (Uint16) ((((Sint32) SDL_SwapBE16(src[6])) + ((Sint32) last_sample6)) >> 1);
            sample5 = (Uint16) ((((Sint32) SDL_SwapBE16(src[5])) + ((Sint32) last_sample5)) >> 1);
            sample4 = (Uint16) ((((Sint32) SDL_SwapBE16(src[4])) + ((Sint32) last_sample4)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapBE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapBE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapBE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_U16MSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Uint16 sample0 = SDL_SwapBE16(src[0]);
    Uint16 sample1 = SDL_SwapBE16(src[1]);
    Uint16 sample2 = SDL_SwapBE16(src[2]);
    Uint16 sample3 = SDL_SwapBE16(src[3]);
    Uint16 sample4 = SDL_SwapBE16(src[4]);
    Uint16 sample5 = SDL_SwapBE16(src[5]);
    Uint16 sample6 = SDL_SwapBE16(src[6]);
    Uint16 sample7 = SDL_SwapBE16(src[7]);
    Uint16 last_sample0 = sample0;
    Uint16 last_sample1 = sample1;
    Uint16 last_sample2 = sample2;
    Uint16 last_sample3 = sample3;
    Uint16 last_sample4 = sample4;
    Uint16 last_sample5 = sample5;
    Uint16 last_sample6 = sample6;
    Uint16 last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapBE16(sample0);
            dst[1] = SDL_SwapBE16(sample1);
            dst[2] = SDL_SwapBE16(sample2);
            dst[3] = SDL_SwapBE16(sample3);
            dst[4] = SDL_SwapBE16(sample4);
            dst[5] = SDL_SwapBE16(sample5);
            dst[6] = SDL_SwapBE16(sample6);
            dst[7] = SDL_SwapBE16(sample7);
            dst += 8;
            sample0 = (Uint16) ((((Sint32) SDL_SwapBE16(src[0])) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Uint16) ((((Sint32) SDL_SwapBE16(src[1])) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Uint16) ((((Sint32) SDL_SwapBE16(src[2])) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Uint16) ((((Sint32) SDL_SwapBE16(src[3])) + ((Sint32) last_sample3)) >> 1);
            sample4 = (Uint16) ((((Sint32) SDL_SwapBE16(src[4])) + ((Sint32) last_sample4)) >> 1);
            sample5 = (Uint16) ((((Sint32) SDL_SwapBE16(src[5])) + ((Sint32) last_sample5)) >> 1);
            sample6 = (Uint16) ((((Sint32) SDL_SwapBE16(src[6])) + ((Sint32) last_sample6)) >> 1);
            sample7 = (Uint16) ((((Sint32) SDL_SwapBE16(src[7])) + ((Sint32) last_sample7)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16MSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 1;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 1;
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[0] = ((Sint16) SDL_SwapBE16(sample0));
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16MSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 32;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapBE16(sample0));
            dst++;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16MSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 2;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 2;
    Sint16 sample1 = ((Sint16) SDL_SwapBE16(src[1]));
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 last_sample1 = sample1;
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[1] = ((Sint16) SDL_SwapBE16(sample1));
        dst[0] = ((Sint16) SDL_SwapBE16(sample0));
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16MSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 sample1 = ((Sint16) SDL_SwapBE16(src[1]));
    Sint16 last_sample0 = sample0;
    Sint16 last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapBE16(sample0));
            dst[1] = ((Sint16) SDL_SwapBE16(sample1));
            dst += 2;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16MSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 4;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 4;
    Sint16 sample3 = ((Sint16) SDL_SwapBE16(src[3]));
    Sint16 sample2 = ((Sint16) SDL_SwapBE16(src[2]));
    Sint16 sample1 = ((Sint16) SDL_SwapBE16(src[1]));
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 last_sample3 = sample3;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[3] = ((Sint16) SDL_SwapBE16(sample3));
        dst[2] = ((Sint16) SDL_SwapBE16(sample2));
        dst[1] = ((Sint16) SDL_SwapBE16(sample1));
        dst[0] = ((Sint16) SDL_SwapBE16(sample0));
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16MSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 sample1 = ((Sint16) SDL_SwapBE16(src[1]));
    Sint16 sample2 = ((Sint16) SDL_SwapBE16(src[2]));
    Sint16 sample3 = ((Sint16) SDL_SwapBE16(src[3]));
    Sint16 last_sample0 = sample0;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapBE16(sample0));
            dst[1] = ((Sint16) SDL_SwapBE16(sample1));
            dst[2] = ((Sint16) SDL_SwapBE16(sample2));
            dst[3] = ((Sint16) SDL_SwapBE16(sample3));
            dst += 4;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16MSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 192;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 6;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 6;
    Sint16 sample5 = ((Sint16) SDL_SwapBE16(src[5]));
    Sint16 sample4 = ((Sint16) SDL_SwapBE16(src[4]));
    Sint16 sample3 = ((Sint16) SDL_SwapBE16(src[3]));
    Sint16 sample2 = ((Sint16) SDL_SwapBE16(src[2]));
    Sint16 sample1 = ((Sint16) SDL_SwapBE16(src[1]));
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 last_sample5 = sample5;
    Sint16 last_sample4 = sample4;
    Sint16 last_sample3 = sample3;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[5] = ((Sint16) SDL_SwapBE16(sample5));
        dst[4] = ((Sint16) SDL_SwapBE16(sample4));
        dst[3] = ((Sint16) SDL_SwapBE16(sample3));
        dst[2] = ((Sint16) SDL_SwapBE16(sample2));
        dst[1] = ((Sint16) SDL_SwapBE16(sample1));
        dst[0] = ((Sint16) SDL_SwapBE16(sample0));
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[5]))) + ((Sint32) last_sample5)) >> 1);
            sample4 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[4]))) + ((Sint32) last_sample4)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16MSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 192;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 sample1 = ((Sint16) SDL_SwapBE16(src[1]));
    Sint16 sample2 = ((Sint16) SDL_SwapBE16(src[2]));
    Sint16 sample3 = ((Sint16) SDL_SwapBE16(src[3]));
    Sint16 sample4 = ((Sint16) SDL_SwapBE16(src[4]));
    Sint16 sample5 = ((Sint16) SDL_SwapBE16(src[5]));
    Sint16 last_sample0 = sample0;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample3 = sample3;
    Sint16 last_sample4 = sample4;
    Sint16 last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapBE16(sample0));
            dst[1] = ((Sint16) SDL_SwapBE16(sample1));
            dst[2] = ((Sint16) SDL_SwapBE16(sample2));
            dst[3] = ((Sint16) SDL_SwapBE16(sample3));
            dst[4] = ((Sint16) SDL_SwapBE16(sample4));
            dst[5] = ((Sint16) SDL_SwapBE16(sample5));
            dst += 6;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample4 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[4]))) + ((Sint32) last_sample4)) >> 1);
            sample5 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[5]))) + ((Sint32) last_sample5)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S16MSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 8;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 8;
    Sint16 sample7 = ((Sint16) SDL_SwapBE16(src[7]));
    Sint16 sample6 = ((Sint16) SDL_SwapBE16(src[6]));
    Sint16 sample5 = ((Sint16) SDL_SwapBE16(src[5]));
    Sint16 sample4 = ((Sint16) SDL_SwapBE16(src[4]));
    Sint16 sample3 = ((Sint16) SDL_SwapBE16(src[3]));
    Sint16 sample2 = ((Sint16) SDL_SwapBE16(src[2]));
    Sint16 sample1 = ((Sint16) SDL_SwapBE16(src[1]));
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 last_sample7 = sample7;
    Sint16 last_sample6 = sample6;
    Sint16 last_sample5 = sample5;
    Sint16 last_sample4 = sample4;
    Sint16 last_sample3 = sample3;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample0 = sample0;
    while (dst > target) {
        dst[7] = ((Sint16) SDL_SwapBE16(sample7));
        dst[6] = ((Sint16) SDL_SwapBE16(sample6));
        dst[5] = ((Sint16) SDL_SwapBE16(sample5));
        dst[4] = ((Sint16) SDL_SwapBE16(sample4));
        dst[3] = ((Sint16) SDL_SwapBE16(sample3));
        dst[2] = ((Sint16) SDL_SwapBE16(sample2));
        dst[1] = ((Sint16) SDL_SwapBE16(sample1));
        dst[0] = ((Sint16) SDL_SwapBE16(sample0));
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[7]))) + ((Sint32) last_sample7)) >> 1);
            sample6 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[6]))) + ((Sint32) last_sample6)) >> 1);
            sample5 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[5]))) + ((Sint32) last_sample5)) >> 1);
            sample4 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[4]))) + ((Sint32) last_sample4)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S16MSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint16 sample0 = ((Sint16) SDL_SwapBE16(src[0]));
    Sint16 sample1 = ((Sint16) SDL_SwapBE16(src[1]));
    Sint16 sample2 = ((Sint16) SDL_SwapBE16(src[2]));
    Sint16 sample3 = ((Sint16) SDL_SwapBE16(src[3]));
    Sint16 sample4 = ((Sint16) SDL_SwapBE16(src[4]));
    Sint16 sample5 = ((Sint16) SDL_SwapBE16(src[5]));
    Sint16 sample6 = ((Sint16) SDL_SwapBE16(src[6]));
    Sint16 sample7 = ((Sint16) SDL_SwapBE16(src[7]));
    Sint16 last_sample0 = sample0;
    Sint16 last_sample1 = sample1;
    Sint16 last_sample2 = sample2;
    Sint16 last_sample3 = sample3;
    Sint16 last_sample4 = sample4;
    Sint16 last_sample5 = sample5;
    Sint16 last_sample6 = sample6;
    Sint16 last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint16) SDL_SwapBE16(sample0));
            dst[1] = ((Sint16) SDL_SwapBE16(sample1));
            dst[2] = ((Sint16) SDL_SwapBE16(sample2));
            dst[3] = ((Sint16) SDL_SwapBE16(sample3));
            dst[4] = ((Sint16) SDL_SwapBE16(sample4));
            dst[5] = ((Sint16) SDL_SwapBE16(sample5));
            dst[6] = ((Sint16) SDL_SwapBE16(sample6));
            dst[7] = ((Sint16) SDL_SwapBE16(sample7));
            dst += 8;
            sample0 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[0]))) + ((Sint32) last_sample0)) >> 1);
            sample1 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[1]))) + ((Sint32) last_sample1)) >> 1);
            sample2 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[2]))) + ((Sint32) last_sample2)) >> 1);
            sample3 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[3]))) + ((Sint32) last_sample3)) >> 1);
            sample4 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[4]))) + ((Sint32) last_sample4)) >> 1);
            sample5 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[5]))) + ((Sint32) last_sample5)) >> 1);
            sample6 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[6]))) + ((Sint32) last_sample6)) >> 1);
            sample7 = (Sint16) ((((Sint32) ((Sint16) SDL_SwapBE16(src[7]))) + ((Sint32) last_sample7)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32LSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 1;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 1;
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[0] = ((Sint32) SDL_SwapLE32(sample0));
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32LSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapLE32(sample0));
            dst++;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32LSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 2;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 2;
    Sint32 sample1 = ((Sint32) SDL_SwapLE32(src[1]));
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 last_sample1 = sample1;
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[1] = ((Sint32) SDL_SwapLE32(sample1));
        dst[0] = ((Sint32) SDL_SwapLE32(sample0));
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32LSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 sample1 = ((Sint32) SDL_SwapLE32(src[1]));
    Sint32 last_sample0 = sample0;
    Sint32 last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapLE32(sample0));
            dst[1] = ((Sint32) SDL_SwapLE32(sample1));
            dst += 2;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32LSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 4;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 4;
    Sint32 sample3 = ((Sint32) SDL_SwapLE32(src[3]));
    Sint32 sample2 = ((Sint32) SDL_SwapLE32(src[2]));
    Sint32 sample1 = ((Sint32) SDL_SwapLE32(src[1]));
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 last_sample3 = sample3;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[3] = ((Sint32) SDL_SwapLE32(sample3));
        dst[2] = ((Sint32) SDL_SwapLE32(sample2));
        dst[1] = ((Sint32) SDL_SwapLE32(sample1));
        dst[0] = ((Sint32) SDL_SwapLE32(sample0));
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32LSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 sample1 = ((Sint32) SDL_SwapLE32(src[1]));
    Sint32 sample2 = ((Sint32) SDL_SwapLE32(src[2]));
    Sint32 sample3 = ((Sint32) SDL_SwapLE32(src[3]));
    Sint32 last_sample0 = sample0;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapLE32(sample0));
            dst[1] = ((Sint32) SDL_SwapLE32(sample1));
            dst[2] = ((Sint32) SDL_SwapLE32(sample2));
            dst[3] = ((Sint32) SDL_SwapLE32(sample3));
            dst += 4;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32LSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 384;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 6;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 6;
    Sint32 sample5 = ((Sint32) SDL_SwapLE32(src[5]));
    Sint32 sample4 = ((Sint32) SDL_SwapLE32(src[4]));
    Sint32 sample3 = ((Sint32) SDL_SwapLE32(src[3]));
    Sint32 sample2 = ((Sint32) SDL_SwapLE32(src[2]));
    Sint32 sample1 = ((Sint32) SDL_SwapLE32(src[1]));
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 last_sample5 = sample5;
    Sint32 last_sample4 = sample4;
    Sint32 last_sample3 = sample3;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[5] = ((Sint32) SDL_SwapLE32(sample5));
        dst[4] = ((Sint32) SDL_SwapLE32(sample4));
        dst[3] = ((Sint32) SDL_SwapLE32(sample3));
        dst[2] = ((Sint32) SDL_SwapLE32(sample2));
        dst[1] = ((Sint32) SDL_SwapLE32(sample1));
        dst[0] = ((Sint32) SDL_SwapLE32(sample0));
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[5]))) + ((Sint64) last_sample5)) >> 1);
            sample4 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[4]))) + ((Sint64) last_sample4)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32LSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 384;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 sample1 = ((Sint32) SDL_SwapLE32(src[1]));
    Sint32 sample2 = ((Sint32) SDL_SwapLE32(src[2]));
    Sint32 sample3 = ((Sint32) SDL_SwapLE32(src[3]));
    Sint32 sample4 = ((Sint32) SDL_SwapLE32(src[4]));
    Sint32 sample5 = ((Sint32) SDL_SwapLE32(src[5]));
    Sint32 last_sample0 = sample0;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample3 = sample3;
    Sint32 last_sample4 = sample4;
    Sint32 last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapLE32(sample0));
            dst[1] = ((Sint32) SDL_SwapLE32(sample1));
            dst[2] = ((Sint32) SDL_SwapLE32(sample2));
            dst[3] = ((Sint32) SDL_SwapLE32(sample3));
            dst[4] = ((Sint32) SDL_SwapLE32(sample4));
            dst[5] = ((Sint32) SDL_SwapLE32(sample5));
            dst += 6;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample4 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[4]))) + ((Sint64) last_sample4)) >> 1);
            sample5 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[5]))) + ((Sint64) last_sample5)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32LSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 512;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 8;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 8;
    Sint32 sample7 = ((Sint32) SDL_SwapLE32(src[7]));
    Sint32 sample6 = ((Sint32) SDL_SwapLE32(src[6]));
    Sint32 sample5 = ((Sint32) SDL_SwapLE32(src[5]));
    Sint32 sample4 = ((Sint32) SDL_SwapLE32(src[4]));
    Sint32 sample3 = ((Sint32) SDL_SwapLE32(src[3]));
    Sint32 sample2 = ((Sint32) SDL_SwapLE32(src[2]));
    Sint32 sample1 = ((Sint32) SDL_SwapLE32(src[1]));
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 last_sample7 = sample7;
    Sint32 last_sample6 = sample6;
    Sint32 last_sample5 = sample5;
    Sint32 last_sample4 = sample4;
    Sint32 last_sample3 = sample3;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[7] = ((Sint32) SDL_SwapLE32(sample7));
        dst[6] = ((Sint32) SDL_SwapLE32(sample6));
        dst[5] = ((Sint32) SDL_SwapLE32(sample5));
        dst[4] = ((Sint32) SDL_SwapLE32(sample4));
        dst[3] = ((Sint32) SDL_SwapLE32(sample3));
        dst[2] = ((Sint32) SDL_SwapLE32(sample2));
        dst[1] = ((Sint32) SDL_SwapLE32(sample1));
        dst[0] = ((Sint32) SDL_SwapLE32(sample0));
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[7]))) + ((Sint64) last_sample7)) >> 1);
            sample6 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[6]))) + ((Sint64) last_sample6)) >> 1);
            sample5 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[5]))) + ((Sint64) last_sample5)) >> 1);
            sample4 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[4]))) + ((Sint64) last_sample4)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32LSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 512;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapLE32(src[0]));
    Sint32 sample1 = ((Sint32) SDL_SwapLE32(src[1]));
    Sint32 sample2 = ((Sint32) SDL_SwapLE32(src[2]));
    Sint32 sample3 = ((Sint32) SDL_SwapLE32(src[3]));
    Sint32 sample4 = ((Sint32) SDL_SwapLE32(src[4]));
    Sint32 sample5 = ((Sint32) SDL_SwapLE32(src[5]));
    Sint32 sample6 = ((Sint32) SDL_SwapLE32(src[6]));
    Sint32 sample7 = ((Sint32) SDL_SwapLE32(src[7]));
    Sint32 last_sample0 = sample0;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample3 = sample3;
    Sint32 last_sample4 = sample4;
    Sint32 last_sample5 = sample5;
    Sint32 last_sample6 = sample6;
    Sint32 last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapLE32(sample0));
            dst[1] = ((Sint32) SDL_SwapLE32(sample1));
            dst[2] = ((Sint32) SDL_SwapLE32(sample2));
            dst[3] = ((Sint32) SDL_SwapLE32(sample3));
            dst[4] = ((Sint32) SDL_SwapLE32(sample4));
            dst[5] = ((Sint32) SDL_SwapLE32(sample5));
            dst[6] = ((Sint32) SDL_SwapLE32(sample6));
            dst[7] = ((Sint32) SDL_SwapLE32(sample7));
            dst += 8;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample4 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[4]))) + ((Sint64) last_sample4)) >> 1);
            sample5 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[5]))) + ((Sint64) last_sample5)) >> 1);
            sample6 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[6]))) + ((Sint64) last_sample6)) >> 1);
            sample7 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapLE32(src[7]))) + ((Sint64) last_sample7)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32MSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 1;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 1;
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[0] = ((Sint32) SDL_SwapBE32(sample0));
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32MSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapBE32(sample0));
            dst++;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32MSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 2;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 2;
    Sint32 sample1 = ((Sint32) SDL_SwapBE32(src[1]));
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 last_sample1 = sample1;
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[1] = ((Sint32) SDL_SwapBE32(sample1));
        dst[0] = ((Sint32) SDL_SwapBE32(sample0));
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32MSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 sample1 = ((Sint32) SDL_SwapBE32(src[1]));
    Sint32 last_sample0 = sample0;
    Sint32 last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapBE32(sample0));
            dst[1] = ((Sint32) SDL_SwapBE32(sample1));
            dst += 2;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32MSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 4;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 4;
    Sint32 sample3 = ((Sint32) SDL_SwapBE32(src[3]));
    Sint32 sample2 = ((Sint32) SDL_SwapBE32(src[2]));
    Sint32 sample1 = ((Sint32) SDL_SwapBE32(src[1]));
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 last_sample3 = sample3;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[3] = ((Sint32) SDL_SwapBE32(sample3));
        dst[2] = ((Sint32) SDL_SwapBE32(sample2));
        dst[1] = ((Sint32) SDL_SwapBE32(sample1));
        dst[0] = ((Sint32) SDL_SwapBE32(sample0));
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32MSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 sample1 = ((Sint32) SDL_SwapBE32(src[1]));
    Sint32 sample2 = ((Sint32) SDL_SwapBE32(src[2]));
    Sint32 sample3 = ((Sint32) SDL_SwapBE32(src[3]));
    Sint32 last_sample0 = sample0;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapBE32(sample0));
            dst[1] = ((Sint32) SDL_SwapBE32(sample1));
            dst[2] = ((Sint32) SDL_SwapBE32(sample2));
            dst[3] = ((Sint32) SDL_SwapBE32(sample3));
            dst += 4;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32MSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 384;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 6;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 6;
    Sint32 sample5 = ((Sint32) SDL_SwapBE32(src[5]));
    Sint32 sample4 = ((Sint32) SDL_SwapBE32(src[4]));
    Sint32 sample3 = ((Sint32) SDL_SwapBE32(src[3]));
    Sint32 sample2 = ((Sint32) SDL_SwapBE32(src[2]));
    Sint32 sample1 = ((Sint32) SDL_SwapBE32(src[1]));
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 last_sample5 = sample5;
    Sint32 last_sample4 = sample4;
    Sint32 last_sample3 = sample3;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[5] = ((Sint32) SDL_SwapBE32(sample5));
        dst[4] = ((Sint32) SDL_SwapBE32(sample4));
        dst[3] = ((Sint32) SDL_SwapBE32(sample3));
        dst[2] = ((Sint32) SDL_SwapBE32(sample2));
        dst[1] = ((Sint32) SDL_SwapBE32(sample1));
        dst[0] = ((Sint32) SDL_SwapBE32(sample0));
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[5]))) + ((Sint64) last_sample5)) >> 1);
            sample4 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[4]))) + ((Sint64) last_sample4)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32MSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 384;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 sample1 = ((Sint32) SDL_SwapBE32(src[1]));
    Sint32 sample2 = ((Sint32) SDL_SwapBE32(src[2]));
    Sint32 sample3 = ((Sint32) SDL_SwapBE32(src[3]));
    Sint32 sample4 = ((Sint32) SDL_SwapBE32(src[4]));
    Sint32 sample5 = ((Sint32) SDL_SwapBE32(src[5]));
    Sint32 last_sample0 = sample0;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample3 = sample3;
    Sint32 last_sample4 = sample4;
    Sint32 last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapBE32(sample0));
            dst[1] = ((Sint32) SDL_SwapBE32(sample1));
            dst[2] = ((Sint32) SDL_SwapBE32(sample2));
            dst[3] = ((Sint32) SDL_SwapBE32(sample3));
            dst[4] = ((Sint32) SDL_SwapBE32(sample4));
            dst[5] = ((Sint32) SDL_SwapBE32(sample5));
            dst += 6;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample4 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[4]))) + ((Sint64) last_sample4)) >> 1);
            sample5 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[5]))) + ((Sint64) last_sample5)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_S32MSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 512;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 8;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 8;
    Sint32 sample7 = ((Sint32) SDL_SwapBE32(src[7]));
    Sint32 sample6 = ((Sint32) SDL_SwapBE32(src[6]));
    Sint32 sample5 = ((Sint32) SDL_SwapBE32(src[5]));
    Sint32 sample4 = ((Sint32) SDL_SwapBE32(src[4]));
    Sint32 sample3 = ((Sint32) SDL_SwapBE32(src[3]));
    Sint32 sample2 = ((Sint32) SDL_SwapBE32(src[2]));
    Sint32 sample1 = ((Sint32) SDL_SwapBE32(src[1]));
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 last_sample7 = sample7;
    Sint32 last_sample6 = sample6;
    Sint32 last_sample5 = sample5;
    Sint32 last_sample4 = sample4;
    Sint32 last_sample3 = sample3;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample0 = sample0;
    while (dst > target) {
        dst[7] = ((Sint32) SDL_SwapBE32(sample7));
        dst[6] = ((Sint32) SDL_SwapBE32(sample6));
        dst[5] = ((Sint32) SDL_SwapBE32(sample5));
        dst[4] = ((Sint32) SDL_SwapBE32(sample4));
        dst[3] = ((Sint32) SDL_SwapBE32(sample3));
        dst[2] = ((Sint32) SDL_SwapBE32(sample2));
        dst[1] = ((Sint32) SDL_SwapBE32(sample1));
        dst[0] = ((Sint32) SDL_SwapBE32(sample0));
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[7]))) + ((Sint64) last_sample7)) >> 1);
            sample6 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[6]))) + ((Sint64) last_sample6)) >> 1);
            sample5 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[5]))) + ((Sint64) last_sample5)) >> 1);
            sample4 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[4]))) + ((Sint64) last_sample4)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_S32MSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 512;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint32 sample0 = ((Sint32) SDL_SwapBE32(src[0]));
    Sint32 sample1 = ((Sint32) SDL_SwapBE32(src[1]));
    Sint32 sample2 = ((Sint32) SDL_SwapBE32(src[2]));
    Sint32 sample3 = ((Sint32) SDL_SwapBE32(src[3]));
    Sint32 sample4 = ((Sint32) SDL_SwapBE32(src[4]));
    Sint32 sample5 = ((Sint32) SDL_SwapBE32(src[5]));
    Sint32 sample6 = ((Sint32) SDL_SwapBE32(src[6]));
    Sint32 sample7 = ((Sint32) SDL_SwapBE32(src[7]));
    Sint32 last_sample0 = sample0;
    Sint32 last_sample1 = sample1;
    Sint32 last_sample2 = sample2;
    Sint32 last_sample3 = sample3;
    Sint32 last_sample4 = sample4;
    Sint32 last_sample5 = sample5;
    Sint32 last_sample6 = sample6;
    Sint32 last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = ((Sint32) SDL_SwapBE32(sample0));
            dst[1] = ((Sint32) SDL_SwapBE32(sample1));
            dst[2] = ((Sint32) SDL_SwapBE32(sample2));
            dst[3] = ((Sint32) SDL_SwapBE32(sample3));
            dst[4] = ((Sint32) SDL_SwapBE32(sample4));
            dst[5] = ((Sint32) SDL_SwapBE32(sample5));
            dst[6] = ((Sint32) SDL_SwapBE32(sample6));
            dst[7] = ((Sint32) SDL_SwapBE32(sample7));
            dst += 8;
            sample0 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[0]))) + ((Sint64) last_sample0)) >> 1);
            sample1 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[1]))) + ((Sint64) last_sample1)) >> 1);
            sample2 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[2]))) + ((Sint64) last_sample2)) >> 1);
            sample3 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[3]))) + ((Sint64) last_sample3)) >> 1);
            sample4 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[4]))) + ((Sint64) last_sample4)) >> 1);
            sample5 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[5]))) + ((Sint64) last_sample5)) >> 1);
            sample6 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[6]))) + ((Sint64) last_sample6)) >> 1);
            sample7 = (Sint32) ((((Sint64) ((Sint32) SDL_SwapBE32(src[7]))) + ((Sint64) last_sample7)) >> 1);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32LSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 1;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 1;
    const float *target = ((const float *) cvt->buf) - 1;
    float sample0 = SDL_SwapFloatLE(src[0]);
    float last_sample0 = sample0;
    while (dst > target) {
        dst[0] = SDL_SwapFloatLE(sample0);
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32LSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatLE(src[0]);
    float last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatLE(sample0);
            dst++;
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32LSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 2;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 2;
    const float *target = ((const float *) cvt->buf) - 2;
    float sample1 = SDL_SwapFloatLE(src[1]);
    float sample0 = SDL_SwapFloatLE(src[0]);
    float last_sample1 = sample1;
    float last_sample0 = sample0;
    while (dst > target) {
        dst[1] = SDL_SwapFloatLE(sample1);
        dst[0] = SDL_SwapFloatLE(sample0);
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (float) ((((double) SDL_SwapFloatLE(src[1])) + ((double) last_sample1)) * 0.5);
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32LSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatLE(src[0]);
    float sample1 = SDL_SwapFloatLE(src[1]);
    float last_sample0 = sample0;
    float last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatLE(sample0);
            dst[1] = SDL_SwapFloatLE(sample1);
            dst += 2;
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatLE(src[1])) + ((double) last_sample1)) * 0.5);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32LSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 4;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 4;
    const float *target = ((const float *) cvt->buf) - 4;
    float sample3 = SDL_SwapFloatLE(src[3]);
    float sample2 = SDL_SwapFloatLE(src[2]);
    float sample1 = SDL_SwapFloatLE(src[1]);
    float sample0 = SDL_SwapFloatLE(src[0]);
    float last_sample3 = sample3;
    float last_sample2 = sample2;
    float last_sample1 = sample1;
    float last_sample0 = sample0;
    while (dst > target) {
        dst[3] = SDL_SwapFloatLE(sample3);
        dst[2] = SDL_SwapFloatLE(sample2);
        dst[1] = SDL_SwapFloatLE(sample1);
        dst[0] = SDL_SwapFloatLE(sample0);
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (float) ((((double) SDL_SwapFloatLE(src[3])) + ((double) last_sample3)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatLE(src[2])) + ((double) last_sample2)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatLE(src[1])) + ((double) last_sample1)) * 0.5);
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32LSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatLE(src[0]);
    float sample1 = SDL_SwapFloatLE(src[1]);
    float sample2 = SDL_SwapFloatLE(src[2]);
    float sample3 = SDL_SwapFloatLE(src[3]);
    float last_sample0 = sample0;
    float last_sample1 = sample1;
    float last_sample2 = sample2;
    float last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatLE(sample0);
            dst[1] = SDL_SwapFloatLE(sample1);
            dst[2] = SDL_SwapFloatLE(sample2);
            dst[3] = SDL_SwapFloatLE(sample3);
            dst += 4;
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatLE(src[1])) + ((double) last_sample1)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatLE(src[2])) + ((double) last_sample2)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatLE(src[3])) + ((double) last_sample3)) * 0.5);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32LSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 384;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 6;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 6;
    const float *target = ((const float *) cvt->buf) - 6;
    float sample5 = SDL_SwapFloatLE(src[5]);
    float sample4 = SDL_SwapFloatLE(src[4]);
    float sample3 = SDL_SwapFloatLE(src[3]);
    float sample2 = SDL_SwapFloatLE(src[2]);
    float sample1 = SDL_SwapFloatLE(src[1]);
    float sample0 = SDL_SwapFloatLE(src[0]);
    float last_sample5 = sample5;
    float last_sample4 = sample4;
    float last_sample3 = sample3;
    float last_sample2 = sample2;
    float last_sample1 = sample1;
    float last_sample0 = sample0;
    while (dst > target) {
        dst[5] = SDL_SwapFloatLE(sample5);
        dst[4] = SDL_SwapFloatLE(sample4);
        dst[3] = SDL_SwapFloatLE(sample3);
        dst[2] = SDL_SwapFloatLE(sample2);
        dst[1] = SDL_SwapFloatLE(sample1);
        dst[0] = SDL_SwapFloatLE(sample0);
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (float) ((((double) SDL_SwapFloatLE(src[5])) + ((double) last_sample5)) * 0.5);
            sample4 = (float) ((((double) SDL_SwapFloatLE(src[4])) + ((double) last_sample4)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatLE(src[3])) + ((double) last_sample3)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatLE(src[2])) + ((double) last_sample2)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatLE(src[1])) + ((double) last_sample1)) * 0.5);
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32LSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 384;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatLE(src[0]);
    float sample1 = SDL_SwapFloatLE(src[1]);
    float sample2 = SDL_SwapFloatLE(src[2]);
    float sample3 = SDL_SwapFloatLE(src[3]);
    float sample4 = SDL_SwapFloatLE(src[4]);
    float sample5 = SDL_SwapFloatLE(src[5]);
    float last_sample0 = sample0;
    float last_sample1 = sample1;
    float last_sample2 = sample2;
    float last_sample3 = sample3;
    float last_sample4 = sample4;
    float last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatLE(sample0);
            dst[1] = SDL_SwapFloatLE(sample1);
            dst[2] = SDL_SwapFloatLE(sample2);
            dst[3] = SDL_SwapFloatLE(sample3);
            dst[4] = SDL_SwapFloatLE(sample4);
            dst[5] = SDL_SwapFloatLE(sample5);
            dst += 6;
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatLE(src[1])) + ((double) last_sample1)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatLE(src[2])) + ((double) last_sample2)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatLE(src[3])) + ((double) last_sample3)) * 0.5);
            sample4 = (float) ((((double) SDL_SwapFloatLE(src[4])) + ((double) last_sample4)) * 0.5);
            sample5 = (float) ((((double) SDL_SwapFloatLE(src[5])) + ((double) last_sample5)) * 0.5);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32LSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 512;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 8;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 8;
    const float *target = ((const float *) cvt->buf) - 8;
    float sample7 = SDL_SwapFloatLE(src[7]);
    float sample6 = SDL_SwapFloatLE(src[6]);
    float sample5 = SDL_SwapFloatLE(src[5]);
    float sample4 = SDL_SwapFloatLE(src[4]);
    float sample3 = SDL_SwapFloatLE(src[3]);
    float sample2 = SDL_SwapFloatLE(src[2]);
    float sample1 = SDL_SwapFloatLE(src[1]);
    float sample0 = SDL_SwapFloatLE(src[0]);
    float last_sample7 = sample7;
    float last_sample6 = sample6;
    float last_sample5 = sample5;
    float last_sample4 = sample4;
    float last_sample3 = sample3;
    float last_sample2 = sample2;
    float last_sample1 = sample1;
    float last_sample0 = sample0;
    while (dst > target) {
        dst[7] = SDL_SwapFloatLE(sample7);
        dst[6] = SDL_SwapFloatLE(sample6);
        dst[5] = SDL_SwapFloatLE(sample5);
        dst[4] = SDL_SwapFloatLE(sample4);
        dst[3] = SDL_SwapFloatLE(sample3);
        dst[2] = SDL_SwapFloatLE(sample2);
        dst[1] = SDL_SwapFloatLE(sample1);
        dst[0] = SDL_SwapFloatLE(sample0);
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (float) ((((double) SDL_SwapFloatLE(src[7])) + ((double) last_sample7)) * 0.5);
            sample6 = (float) ((((double) SDL_SwapFloatLE(src[6])) + ((double) last_sample6)) * 0.5);
            sample5 = (float) ((((double) SDL_SwapFloatLE(src[5])) + ((double) last_sample5)) * 0.5);
            sample4 = (float) ((((double) SDL_SwapFloatLE(src[4])) + ((double) last_sample4)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatLE(src[3])) + ((double) last_sample3)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatLE(src[2])) + ((double) last_sample2)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatLE(src[1])) + ((double) last_sample1)) * 0.5);
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32LSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 512;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatLE(src[0]);
    float sample1 = SDL_SwapFloatLE(src[1]);
    float sample2 = SDL_SwapFloatLE(src[2]);
    float sample3 = SDL_SwapFloatLE(src[3]);
    float sample4 = SDL_SwapFloatLE(src[4]);
    float sample5 = SDL_SwapFloatLE(src[5]);
    float sample6 = SDL_SwapFloatLE(src[6]);
    float sample7 = SDL_SwapFloatLE(src[7]);
    float last_sample0 = sample0;
    float last_sample1 = sample1;
    float last_sample2 = sample2;
    float last_sample3 = sample3;
    float last_sample4 = sample4;
    float last_sample5 = sample5;
    float last_sample6 = sample6;
    float last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatLE(sample0);
            dst[1] = SDL_SwapFloatLE(sample1);
            dst[2] = SDL_SwapFloatLE(sample2);
            dst[3] = SDL_SwapFloatLE(sample3);
            dst[4] = SDL_SwapFloatLE(sample4);
            dst[5] = SDL_SwapFloatLE(sample5);
            dst[6] = SDL_SwapFloatLE(sample6);
            dst[7] = SDL_SwapFloatLE(sample7);
            dst += 8;
            sample0 = (float) ((((double) SDL_SwapFloatLE(src[0])) + ((double) last_sample0)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatLE(src[1])) + ((double) last_sample1)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatLE(src[2])) + ((double) last_sample2)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatLE(src[3])) + ((double) last_sample3)) * 0.5);
            sample4 = (float) ((((double) SDL_SwapFloatLE(src[4])) + ((double) last_sample4)) * 0.5);
            sample5 = (float) ((((double) SDL_SwapFloatLE(src[5])) + ((double) last_sample5)) * 0.5);
            sample6 = (float) ((((double) SDL_SwapFloatLE(src[6])) + ((double) last_sample6)) * 0.5);
            sample7 = (float) ((((double) SDL_SwapFloatLE(src[7])) + ((double) last_sample7)) * 0.5);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32MSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 1;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 1;
    const float *target = ((const float *) cvt->buf) - 1;
    float sample0 = SDL_SwapFloatBE(src[0]);
    float last_sample0 = sample0;
    while (dst > target) {
        dst[0] = SDL_SwapFloatBE(sample0);
        dst--;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src--;
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_1c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32MSB, 1 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 64;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatBE(src[0]);
    float last_sample0 = sample0;
    while (dst < target) {
        src++;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatBE(sample0);
            dst++;
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample0 = sample0;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32MSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 2;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 2;
    const float *target = ((const float *) cvt->buf) - 2;
    float sample1 = SDL_SwapFloatBE(src[1]);
    float sample0 = SDL_SwapFloatBE(src[0]);
    float last_sample1 = sample1;
    float last_sample0 = sample0;
    while (dst > target) {
        dst[1] = SDL_SwapFloatBE(sample1);
        dst[0] = SDL_SwapFloatBE(sample0);
        dst -= 2;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 2;
            sample1 = (float) ((((double) SDL_SwapFloatBE(src[1])) + ((double) last_sample1)) * 0.5);
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_2c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32MSB, 2 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 128;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatBE(src[0]);
    float sample1 = SDL_SwapFloatBE(src[1]);
    float last_sample0 = sample0;
    float last_sample1 = sample1;
    while (dst < target) {
        src += 2;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatBE(sample0);
            dst[1] = SDL_SwapFloatBE(sample1);
            dst += 2;
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatBE(src[1])) + ((double) last_sample1)) * 0.5);
            last_sample0 = sample0;
            last_sample1 = sample1;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32MSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 4;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 4;
    const float *target = ((const float *) cvt->buf) - 4;
    float sample3 = SDL_SwapFloatBE(src[3]);
    float sample2 = SDL_SwapFloatBE(src[2]);
    float sample1 = SDL_SwapFloatBE(src[1]);
    float sample0 = SDL_SwapFloatBE(src[0]);
    float last_sample3 = sample3;
    float last_sample2 = sample2;
    float last_sample1 = sample1;
    float last_sample0 = sample0;
    while (dst > target) {
        dst[3] = SDL_SwapFloatBE(sample3);
        dst[2] = SDL_SwapFloatBE(sample2);
        dst[1] = SDL_SwapFloatBE(sample1);
        dst[0] = SDL_SwapFloatBE(sample0);
        dst -= 4;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 4;
            sample3 = (float) ((((double) SDL_SwapFloatBE(src[3])) + ((double) last_sample3)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatBE(src[2])) + ((double) last_sample2)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatBE(src[1])) + ((double) last_sample1)) * 0.5);
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_4c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32MSB, 4 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 256;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatBE(src[0]);
    float sample1 = SDL_SwapFloatBE(src[1]);
    float sample2 = SDL_SwapFloatBE(src[2]);
    float sample3 = SDL_SwapFloatBE(src[3]);
    float last_sample0 = sample0;
    float last_sample1 = sample1;
    float last_sample2 = sample2;
    float last_sample3 = sample3;
    while (dst < target) {
        src += 4;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatBE(sample0);
            dst[1] = SDL_SwapFloatBE(sample1);
            dst[2] = SDL_SwapFloatBE(sample2);
            dst[3] = SDL_SwapFloatBE(sample3);
            dst += 4;
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatBE(src[1])) + ((double) last_sample1)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatBE(src[2])) + ((double) last_sample2)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatBE(src[3])) + ((double) last_sample3)) * 0.5);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32MSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 384;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 6;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 6;
    const float *target = ((const float *) cvt->buf) - 6;
    float sample5 = SDL_SwapFloatBE(src[5]);
    float sample4 = SDL_SwapFloatBE(src[4]);
    float sample3 = SDL_SwapFloatBE(src[3]);
    float sample2 = SDL_SwapFloatBE(src[2]);
    float sample1 = SDL_SwapFloatBE(src[1]);
    float sample0 = SDL_SwapFloatBE(src[0]);
    float last_sample5 = sample5;
    float last_sample4 = sample4;
    float last_sample3 = sample3;
    float last_sample2 = sample2;
    float last_sample1 = sample1;
    float last_sample0 = sample0;
    while (dst > target) {
        dst[5] = SDL_SwapFloatBE(sample5);
        dst[4] = SDL_SwapFloatBE(sample4);
        dst[3] = SDL_SwapFloatBE(sample3);
        dst[2] = SDL_SwapFloatBE(sample2);
        dst[1] = SDL_SwapFloatBE(sample1);
        dst[0] = SDL_SwapFloatBE(sample0);
        dst -= 6;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 6;
            sample5 = (float) ((((double) SDL_SwapFloatBE(src[5])) + ((double) last_sample5)) * 0.5);
            sample4 = (float) ((((double) SDL_SwapFloatBE(src[4])) + ((double) last_sample4)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatBE(src[3])) + ((double) last_sample3)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatBE(src[2])) + ((double) last_sample2)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatBE(src[1])) + ((double) last_sample1)) * 0.5);
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_6c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32MSB, 6 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 384;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatBE(src[0]);
    float sample1 = SDL_SwapFloatBE(src[1]);
    float sample2 = SDL_SwapFloatBE(src[2]);
    float sample3 = SDL_SwapFloatBE(src[3]);
    float sample4 = SDL_SwapFloatBE(src[4]);
    float sample5 = SDL_SwapFloatBE(src[5]);
    float last_sample0 = sample0;
    float last_sample1 = sample1;
    float last_sample2 = sample2;
    float last_sample3 = sample3;
    float last_sample4 = sample4;
    float last_sample5 = sample5;
    while (dst < target) {
        src += 6;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatBE(sample0);
            dst[1] = SDL_SwapFloatBE(sample1);
            dst[2] = SDL_SwapFloatBE(sample2);
            dst[3] = SDL_SwapFloatBE(sample3);
            dst[4] = SDL_SwapFloatBE(sample4);
            dst[5] = SDL_SwapFloatBE(sample5);
            dst += 6;
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatBE(src[1])) + ((double) last_sample1)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatBE(src[2])) + ((double) last_sample2)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatBE(src[3])) + ((double) last_sample3)) * 0.5);
            sample4 = (float) ((((double) SDL_SwapFloatBE(src[4])) + ((double) last_sample4)) * 0.5);
            sample5 = (float) ((((double) SDL_SwapFloatBE(src[5])) + ((double) last_sample5)) * 0.5);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample arbitrary (x%f) AUDIO_F32MSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 512;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = ((float *) (cvt->buf + dstsize)) - 8;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 8;
    const float *target = ((const float *) cvt->buf) - 8;
    float sample7 = SDL_SwapFloatBE(src[7]);
    float sample6 = SDL_SwapFloatBE(src[6]);
    float sample5 = SDL_SwapFloatBE(src[5]);
    float sample4 = SDL_SwapFloatBE(src[4]);
    float sample3 = SDL_SwapFloatBE(src[3]);
    float sample2 = SDL_SwapFloatBE(src[2]);
    float sample1 = SDL_SwapFloatBE(src[1]);
    float sample0 = SDL_SwapFloatBE(src[0]);
    float last_sample7 = sample7;
    float last_sample6 = sample6;
    float last_sample5 = sample5;
    float last_sample4 = sample4;
    float last_sample3 = sample3;
    float last_sample2 = sample2;
    float last_sample1 = sample1;
    float last_sample0 = sample0;
    while (dst > target) {
        dst[7] = SDL_SwapFloatBE(sample7);
        dst[6] = SDL_SwapFloatBE(sample6);
        dst[5] = SDL_SwapFloatBE(sample5);
        dst[4] = SDL_SwapFloatBE(sample4);
        dst[3] = SDL_SwapFloatBE(sample3);
        dst[2] = SDL_SwapFloatBE(sample2);
        dst[1] = SDL_SwapFloatBE(sample1);
        dst[0] = SDL_SwapFloatBE(sample0);
        dst -= 8;
        eps += srcsize;
        if ((eps << 1) >= dstsize) {
            src -= 8;
            sample7 = (float) ((((double) SDL_SwapFloatBE(src[7])) + ((double) last_sample7)) * 0.5);
            sample6 = (float) ((((double) SDL_SwapFloatBE(src[6])) + ((double) last_sample6)) * 0.5);
            sample5 = (float) ((((double) SDL_SwapFloatBE(src[5])) + ((double) last_sample5)) * 0.5);
            sample4 = (float) ((((double) SDL_SwapFloatBE(src[4])) + ((double) last_sample4)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatBE(src[3])) + ((double) last_sample3)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatBE(src[2])) + ((double) last_sample2)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatBE(src[1])) + ((double) last_sample1)) * 0.5);
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            last_sample7 = sample7;
            last_sample6 = sample6;
            last_sample5 = sample5;
            last_sample4 = sample4;
            last_sample3 = sample3;
            last_sample2 = sample2;
            last_sample1 = sample1;
            last_sample0 = sample0;
            eps -= dstsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_8c(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample arbitrary (x%f) AUDIO_F32MSB, 8 channels.\n", cvt->rate_incr);
#endif

    const int srcsize = cvt->len_cvt - 512;
    const int dstsize = (int) (((double)cvt->len_cvt) * cvt->rate_incr);
    register int eps = 0;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    float sample0 = SDL_SwapFloatBE(src[0]);
    float sample1 = SDL_SwapFloatBE(src[1]);
    float sample2 = SDL_SwapFloatBE(src[2]);
    float sample3 = SDL_SwapFloatBE(src[3]);
    float sample4 = SDL_SwapFloatBE(src[4]);
    float sample5 = SDL_SwapFloatBE(src[5]);
    float sample6 = SDL_SwapFloatBE(src[6]);
    float sample7 = SDL_SwapFloatBE(src[7]);
    float last_sample0 = sample0;
    float last_sample1 = sample1;
    float last_sample2 = sample2;
    float last_sample3 = sample3;
    float last_sample4 = sample4;
    float last_sample5 = sample5;
    float last_sample6 = sample6;
    float last_sample7 = sample7;
    while (dst < target) {
        src += 8;
        eps += dstsize;
        if ((eps << 1) >= srcsize) {
            dst[0] = SDL_SwapFloatBE(sample0);
            dst[1] = SDL_SwapFloatBE(sample1);
            dst[2] = SDL_SwapFloatBE(sample2);
            dst[3] = SDL_SwapFloatBE(sample3);
            dst[4] = SDL_SwapFloatBE(sample4);
            dst[5] = SDL_SwapFloatBE(sample5);
            dst[6] = SDL_SwapFloatBE(sample6);
            dst[7] = SDL_SwapFloatBE(sample7);
            dst += 8;
            sample0 = (float) ((((double) SDL_SwapFloatBE(src[0])) + ((double) last_sample0)) * 0.5);
            sample1 = (float) ((((double) SDL_SwapFloatBE(src[1])) + ((double) last_sample1)) * 0.5);
            sample2 = (float) ((((double) SDL_SwapFloatBE(src[2])) + ((double) last_sample2)) * 0.5);
            sample3 = (float) ((((double) SDL_SwapFloatBE(src[3])) + ((double) last_sample3)) * 0.5);
            sample4 = (float) ((((double) SDL_SwapFloatBE(src[4])) + ((double) last_sample4)) * 0.5);
            sample5 = (float) ((((double) SDL_SwapFloatBE(src[5])) + ((double) last_sample5)) * 0.5);
            sample6 = (float) ((((double) SDL_SwapFloatBE(src[6])) + ((double) last_sample6)) * 0.5);
            sample7 = (float) ((((double) SDL_SwapFloatBE(src[7])) + ((double) last_sample7)) * 0.5);
            last_sample0 = sample0;
            last_sample1 = sample1;
            last_sample2 = sample2;
            last_sample3 = sample3;
            last_sample4 = sample4;
            last_sample5 = sample5;
            last_sample6 = sample6;
            last_sample7 = sample7;
            eps -= srcsize;
        }
    }
    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}


#if !LESS_RESAMPLERS

static void SDLCALL
SDL_Upsample_U8_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U8, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 1;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 1;
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample0 = (Sint16) src[0];
        src--;
        dst[1] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[0] = (Uint8) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U8, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        src += 2;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U8, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 1;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 1;
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample0 = (Sint16) src[0];
        src--;
        dst[3] = (Uint8) sample0;
        dst[2] = (Uint8) (((3 * sample0) + last_sample0) >> 2);
        dst[1] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[0] = (Uint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U8, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        src += 4;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U8, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 2;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 2;
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample0 = (Sint16) src[0];
        src -= 2;
        dst[3] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) sample1;
        dst[0] = (Uint8) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U8, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    Sint16 last_sample1 = (Sint16) src[1];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        const Sint16 sample1 = (Sint16) src[1];
        src += 4;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U8, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 2;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 2;
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample0 = (Sint16) src[0];
        src -= 2;
        dst[7] = (Uint8) sample1;
        dst[6] = (Uint8) sample0;
        dst[5] = (Uint8) (((3 * sample1) + last_sample1) >> 2);
        dst[4] = (Uint8) (((3 * sample0) + last_sample0) >> 2);
        dst[3] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U8, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    Sint16 last_sample1 = (Sint16) src[1];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        const Sint16 sample1 = (Sint16) src[1];
        src += 8;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U8, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 4;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 4;
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample0 = (Sint16) src[0];
        src -= 4;
        dst[7] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[6] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[5] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[4] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[3] = (Uint8) sample3;
        dst[2] = (Uint8) sample2;
        dst[1] = (Uint8) sample1;
        dst[0] = (Uint8) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U8, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample3 = (Sint16) src[3];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample3 = (Sint16) src[3];
        src += 8;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint8) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U8, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 4;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 4;
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample0 = (Sint16) src[0];
        src -= 4;
        dst[15] = (Uint8) sample3;
        dst[14] = (Uint8) sample2;
        dst[13] = (Uint8) sample1;
        dst[12] = (Uint8) sample0;
        dst[11] = (Uint8) (((3 * sample3) + last_sample3) >> 2);
        dst[10] = (Uint8) (((3 * sample2) + last_sample2) >> 2);
        dst[9] = (Uint8) (((3 * sample1) + last_sample1) >> 2);
        dst[8] = (Uint8) (((3 * sample0) + last_sample0) >> 2);
        dst[7] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[6] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[5] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[4] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[3] = (Uint8) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Uint8) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Uint8) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U8, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample3 = (Sint16) src[3];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample3 = (Sint16) src[3];
        src += 16;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint8) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U8, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 6;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 6;
    Sint16 last_sample5 = (Sint16) src[5];
    Sint16 last_sample4 = (Sint16) src[4];
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample5 = (Sint16) src[5];
        const Sint16 sample4 = (Sint16) src[4];
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample0 = (Sint16) src[0];
        src -= 6;
        dst[11] = (Uint8) ((sample5 + last_sample5) >> 1);
        dst[10] = (Uint8) ((sample4 + last_sample4) >> 1);
        dst[9] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[8] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[7] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[6] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[5] = (Uint8) sample5;
        dst[4] = (Uint8) sample4;
        dst[3] = (Uint8) sample3;
        dst[2] = (Uint8) sample2;
        dst[1] = (Uint8) sample1;
        dst[0] = (Uint8) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U8, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample4 = (Sint16) src[4];
    Sint16 last_sample5 = (Sint16) src[5];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample4 = (Sint16) src[4];
        const Sint16 sample5 = (Sint16) src[5];
        src += 12;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint8) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint8) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U8, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 6;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 6;
    Sint16 last_sample5 = (Sint16) src[5];
    Sint16 last_sample4 = (Sint16) src[4];
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample5 = (Sint16) src[5];
        const Sint16 sample4 = (Sint16) src[4];
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample0 = (Sint16) src[0];
        src -= 6;
        dst[23] = (Uint8) sample5;
        dst[22] = (Uint8) sample4;
        dst[21] = (Uint8) sample3;
        dst[20] = (Uint8) sample2;
        dst[19] = (Uint8) sample1;
        dst[18] = (Uint8) sample0;
        dst[17] = (Uint8) (((3 * sample5) + last_sample5) >> 2);
        dst[16] = (Uint8) (((3 * sample4) + last_sample4) >> 2);
        dst[15] = (Uint8) (((3 * sample3) + last_sample3) >> 2);
        dst[14] = (Uint8) (((3 * sample2) + last_sample2) >> 2);
        dst[13] = (Uint8) (((3 * sample1) + last_sample1) >> 2);
        dst[12] = (Uint8) (((3 * sample0) + last_sample0) >> 2);
        dst[11] = (Uint8) ((sample5 + last_sample5) >> 1);
        dst[10] = (Uint8) ((sample4 + last_sample4) >> 1);
        dst[9] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[8] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[7] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[6] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[5] = (Uint8) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Uint8) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Uint8) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Uint8) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Uint8) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U8, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample4 = (Sint16) src[4];
    Sint16 last_sample5 = (Sint16) src[5];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample4 = (Sint16) src[4];
        const Sint16 sample5 = (Sint16) src[5];
        src += 24;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint8) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint8) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U8, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 8;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 8;
    Sint16 last_sample7 = (Sint16) src[7];
    Sint16 last_sample6 = (Sint16) src[6];
    Sint16 last_sample5 = (Sint16) src[5];
    Sint16 last_sample4 = (Sint16) src[4];
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample7 = (Sint16) src[7];
        const Sint16 sample6 = (Sint16) src[6];
        const Sint16 sample5 = (Sint16) src[5];
        const Sint16 sample4 = (Sint16) src[4];
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample0 = (Sint16) src[0];
        src -= 8;
        dst[15] = (Uint8) ((sample7 + last_sample7) >> 1);
        dst[14] = (Uint8) ((sample6 + last_sample6) >> 1);
        dst[13] = (Uint8) ((sample5 + last_sample5) >> 1);
        dst[12] = (Uint8) ((sample4 + last_sample4) >> 1);
        dst[11] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[10] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[9] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[8] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[7] = (Uint8) sample7;
        dst[6] = (Uint8) sample6;
        dst[5] = (Uint8) sample5;
        dst[4] = (Uint8) sample4;
        dst[3] = (Uint8) sample3;
        dst[2] = (Uint8) sample2;
        dst[1] = (Uint8) sample1;
        dst[0] = (Uint8) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U8, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample4 = (Sint16) src[4];
    Sint16 last_sample5 = (Sint16) src[5];
    Sint16 last_sample6 = (Sint16) src[6];
    Sint16 last_sample7 = (Sint16) src[7];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample4 = (Sint16) src[4];
        const Sint16 sample5 = (Sint16) src[5];
        const Sint16 sample6 = (Sint16) src[6];
        const Sint16 sample7 = (Sint16) src[7];
        src += 16;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint8) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint8) ((sample5 + last_sample5) >> 1);
        dst[6] = (Uint8) ((sample6 + last_sample6) >> 1);
        dst[7] = (Uint8) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U8_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U8, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint8 *dst = ((Uint8 *) (cvt->buf + dstsize)) - 8;
    const Uint8 *src = ((Uint8 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Uint8 *target = ((const Uint8 *) cvt->buf) - 8;
    Sint16 last_sample7 = (Sint16) src[7];
    Sint16 last_sample6 = (Sint16) src[6];
    Sint16 last_sample5 = (Sint16) src[5];
    Sint16 last_sample4 = (Sint16) src[4];
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample0 = (Sint16) src[0];
    while (dst > target) {
        const Sint16 sample7 = (Sint16) src[7];
        const Sint16 sample6 = (Sint16) src[6];
        const Sint16 sample5 = (Sint16) src[5];
        const Sint16 sample4 = (Sint16) src[4];
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample0 = (Sint16) src[0];
        src -= 8;
        dst[31] = (Uint8) sample7;
        dst[30] = (Uint8) sample6;
        dst[29] = (Uint8) sample5;
        dst[28] = (Uint8) sample4;
        dst[27] = (Uint8) sample3;
        dst[26] = (Uint8) sample2;
        dst[25] = (Uint8) sample1;
        dst[24] = (Uint8) sample0;
        dst[23] = (Uint8) (((3 * sample7) + last_sample7) >> 2);
        dst[22] = (Uint8) (((3 * sample6) + last_sample6) >> 2);
        dst[21] = (Uint8) (((3 * sample5) + last_sample5) >> 2);
        dst[20] = (Uint8) (((3 * sample4) + last_sample4) >> 2);
        dst[19] = (Uint8) (((3 * sample3) + last_sample3) >> 2);
        dst[18] = (Uint8) (((3 * sample2) + last_sample2) >> 2);
        dst[17] = (Uint8) (((3 * sample1) + last_sample1) >> 2);
        dst[16] = (Uint8) (((3 * sample0) + last_sample0) >> 2);
        dst[15] = (Uint8) ((sample7 + last_sample7) >> 1);
        dst[14] = (Uint8) ((sample6 + last_sample6) >> 1);
        dst[13] = (Uint8) ((sample5 + last_sample5) >> 1);
        dst[12] = (Uint8) ((sample4 + last_sample4) >> 1);
        dst[11] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[10] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[9] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[8] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[7] = (Uint8) ((sample7 + (3 * last_sample7)) >> 2);
        dst[6] = (Uint8) ((sample6 + (3 * last_sample6)) >> 2);
        dst[5] = (Uint8) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Uint8) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Uint8) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Uint8) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Uint8) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U8_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U8, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint8 *dst = (Uint8 *) cvt->buf;
    const Uint8 *src = (Uint8 *) cvt->buf;
    const Uint8 *target = (const Uint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) src[0];
    Sint16 last_sample1 = (Sint16) src[1];
    Sint16 last_sample2 = (Sint16) src[2];
    Sint16 last_sample3 = (Sint16) src[3];
    Sint16 last_sample4 = (Sint16) src[4];
    Sint16 last_sample5 = (Sint16) src[5];
    Sint16 last_sample6 = (Sint16) src[6];
    Sint16 last_sample7 = (Sint16) src[7];
    while (dst < target) {
        const Sint16 sample0 = (Sint16) src[0];
        const Sint16 sample1 = (Sint16) src[1];
        const Sint16 sample2 = (Sint16) src[2];
        const Sint16 sample3 = (Sint16) src[3];
        const Sint16 sample4 = (Sint16) src[4];
        const Sint16 sample5 = (Sint16) src[5];
        const Sint16 sample6 = (Sint16) src[6];
        const Sint16 sample7 = (Sint16) src[7];
        src += 32;
        dst[0] = (Uint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint8) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint8) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint8) ((sample5 + last_sample5) >> 1);
        dst[6] = (Uint8) ((sample6 + last_sample6) >> 1);
        dst[7] = (Uint8) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S8, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 1;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 1;
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src--;
        dst[1] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint8) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S8, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src += 2;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S8, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 1;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 1;
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src--;
        dst[3] = (Sint8) sample0;
        dst[2] = (Sint8) (((3 * sample0) + last_sample0) >> 2);
        dst[1] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S8, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src += 4;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S8, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 2;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 2;
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src -= 2;
        dst[3] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) sample1;
        dst[0] = (Sint8) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S8, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        src += 4;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S8, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 2;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 2;
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src -= 2;
        dst[7] = (Sint8) sample1;
        dst[6] = (Sint8) sample0;
        dst[5] = (Sint8) (((3 * sample1) + last_sample1) >> 2);
        dst[4] = (Sint8) (((3 * sample0) + last_sample0) >> 2);
        dst[3] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S8, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        src += 8;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S8, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 4;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 4;
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src -= 4;
        dst[7] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint8) sample3;
        dst[2] = (Sint8) sample2;
        dst[1] = (Sint8) sample1;
        dst[0] = (Sint8) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S8, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        src += 8;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint8) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S8, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 4;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 4;
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src -= 4;
        dst[15] = (Sint8) sample3;
        dst[14] = (Sint8) sample2;
        dst[13] = (Sint8) sample1;
        dst[12] = (Sint8) sample0;
        dst[11] = (Sint8) (((3 * sample3) + last_sample3) >> 2);
        dst[10] = (Sint8) (((3 * sample2) + last_sample2) >> 2);
        dst[9] = (Sint8) (((3 * sample1) + last_sample1) >> 2);
        dst[8] = (Sint8) (((3 * sample0) + last_sample0) >> 2);
        dst[7] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint8) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint8) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint8) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S8, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        src += 16;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint8) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S8, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 6;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 6;
    Sint16 last_sample5 = (Sint16) ((Sint8) src[5]);
    Sint16 last_sample4 = (Sint16) ((Sint8) src[4]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample5 = (Sint16) ((Sint8) src[5]);
        const Sint16 sample4 = (Sint16) ((Sint8) src[4]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src -= 6;
        dst[11] = (Sint8) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint8) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint8) sample5;
        dst[4] = (Sint8) sample4;
        dst[3] = (Sint8) sample3;
        dst[2] = (Sint8) sample2;
        dst[1] = (Sint8) sample1;
        dst[0] = (Sint8) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S8, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample4 = (Sint16) ((Sint8) src[4]);
    Sint16 last_sample5 = (Sint16) ((Sint8) src[5]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample4 = (Sint16) ((Sint8) src[4]);
        const Sint16 sample5 = (Sint16) ((Sint8) src[5]);
        src += 12;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint8) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint8) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S8, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 6;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 6;
    Sint16 last_sample5 = (Sint16) ((Sint8) src[5]);
    Sint16 last_sample4 = (Sint16) ((Sint8) src[4]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample5 = (Sint16) ((Sint8) src[5]);
        const Sint16 sample4 = (Sint16) ((Sint8) src[4]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src -= 6;
        dst[23] = (Sint8) sample5;
        dst[22] = (Sint8) sample4;
        dst[21] = (Sint8) sample3;
        dst[20] = (Sint8) sample2;
        dst[19] = (Sint8) sample1;
        dst[18] = (Sint8) sample0;
        dst[17] = (Sint8) (((3 * sample5) + last_sample5) >> 2);
        dst[16] = (Sint8) (((3 * sample4) + last_sample4) >> 2);
        dst[15] = (Sint8) (((3 * sample3) + last_sample3) >> 2);
        dst[14] = (Sint8) (((3 * sample2) + last_sample2) >> 2);
        dst[13] = (Sint8) (((3 * sample1) + last_sample1) >> 2);
        dst[12] = (Sint8) (((3 * sample0) + last_sample0) >> 2);
        dst[11] = (Sint8) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint8) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint8) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint8) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint8) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint8) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint8) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S8, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample4 = (Sint16) ((Sint8) src[4]);
    Sint16 last_sample5 = (Sint16) ((Sint8) src[5]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample4 = (Sint16) ((Sint8) src[4]);
        const Sint16 sample5 = (Sint16) ((Sint8) src[5]);
        src += 24;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint8) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint8) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S8, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 8;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 8;
    Sint16 last_sample7 = (Sint16) ((Sint8) src[7]);
    Sint16 last_sample6 = (Sint16) ((Sint8) src[6]);
    Sint16 last_sample5 = (Sint16) ((Sint8) src[5]);
    Sint16 last_sample4 = (Sint16) ((Sint8) src[4]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample7 = (Sint16) ((Sint8) src[7]);
        const Sint16 sample6 = (Sint16) ((Sint8) src[6]);
        const Sint16 sample5 = (Sint16) ((Sint8) src[5]);
        const Sint16 sample4 = (Sint16) ((Sint8) src[4]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src -= 8;
        dst[15] = (Sint8) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint8) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint8) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint8) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint8) sample7;
        dst[6] = (Sint8) sample6;
        dst[5] = (Sint8) sample5;
        dst[4] = (Sint8) sample4;
        dst[3] = (Sint8) sample3;
        dst[2] = (Sint8) sample2;
        dst[1] = (Sint8) sample1;
        dst[0] = (Sint8) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S8, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample4 = (Sint16) ((Sint8) src[4]);
    Sint16 last_sample5 = (Sint16) ((Sint8) src[5]);
    Sint16 last_sample6 = (Sint16) ((Sint8) src[6]);
    Sint16 last_sample7 = (Sint16) ((Sint8) src[7]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample4 = (Sint16) ((Sint8) src[4]);
        const Sint16 sample5 = (Sint16) ((Sint8) src[5]);
        const Sint16 sample6 = (Sint16) ((Sint8) src[6]);
        const Sint16 sample7 = (Sint16) ((Sint8) src[7]);
        src += 16;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint8) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint8) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint8) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint8) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S8_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S8, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint8 *dst = ((Sint8 *) (cvt->buf + dstsize)) - 8;
    const Sint8 *src = ((Sint8 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint8 *target = ((const Sint8 *) cvt->buf) - 8;
    Sint16 last_sample7 = (Sint16) ((Sint8) src[7]);
    Sint16 last_sample6 = (Sint16) ((Sint8) src[6]);
    Sint16 last_sample5 = (Sint16) ((Sint8) src[5]);
    Sint16 last_sample4 = (Sint16) ((Sint8) src[4]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    while (dst > target) {
        const Sint16 sample7 = (Sint16) ((Sint8) src[7]);
        const Sint16 sample6 = (Sint16) ((Sint8) src[6]);
        const Sint16 sample5 = (Sint16) ((Sint8) src[5]);
        const Sint16 sample4 = (Sint16) ((Sint8) src[4]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        src -= 8;
        dst[31] = (Sint8) sample7;
        dst[30] = (Sint8) sample6;
        dst[29] = (Sint8) sample5;
        dst[28] = (Sint8) sample4;
        dst[27] = (Sint8) sample3;
        dst[26] = (Sint8) sample2;
        dst[25] = (Sint8) sample1;
        dst[24] = (Sint8) sample0;
        dst[23] = (Sint8) (((3 * sample7) + last_sample7) >> 2);
        dst[22] = (Sint8) (((3 * sample6) + last_sample6) >> 2);
        dst[21] = (Sint8) (((3 * sample5) + last_sample5) >> 2);
        dst[20] = (Sint8) (((3 * sample4) + last_sample4) >> 2);
        dst[19] = (Sint8) (((3 * sample3) + last_sample3) >> 2);
        dst[18] = (Sint8) (((3 * sample2) + last_sample2) >> 2);
        dst[17] = (Sint8) (((3 * sample1) + last_sample1) >> 2);
        dst[16] = (Sint8) (((3 * sample0) + last_sample0) >> 2);
        dst[15] = (Sint8) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint8) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint8) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint8) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint8) ((sample7 + (3 * last_sample7)) >> 2);
        dst[6] = (Sint8) ((sample6 + (3 * last_sample6)) >> 2);
        dst[5] = (Sint8) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint8) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint8) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint8) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint8) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint8) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S8_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S8, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint8 *dst = (Sint8 *) cvt->buf;
    const Sint8 *src = (Sint8 *) cvt->buf;
    const Sint8 *target = (const Sint8 *) (cvt->buf + dstsize);
    Sint16 last_sample0 = (Sint16) ((Sint8) src[0]);
    Sint16 last_sample1 = (Sint16) ((Sint8) src[1]);
    Sint16 last_sample2 = (Sint16) ((Sint8) src[2]);
    Sint16 last_sample3 = (Sint16) ((Sint8) src[3]);
    Sint16 last_sample4 = (Sint16) ((Sint8) src[4]);
    Sint16 last_sample5 = (Sint16) ((Sint8) src[5]);
    Sint16 last_sample6 = (Sint16) ((Sint8) src[6]);
    Sint16 last_sample7 = (Sint16) ((Sint8) src[7]);
    while (dst < target) {
        const Sint16 sample0 = (Sint16) ((Sint8) src[0]);
        const Sint16 sample1 = (Sint16) ((Sint8) src[1]);
        const Sint16 sample2 = (Sint16) ((Sint8) src[2]);
        const Sint16 sample3 = (Sint16) ((Sint8) src[3]);
        const Sint16 sample4 = (Sint16) ((Sint8) src[4]);
        const Sint16 sample5 = (Sint16) ((Sint8) src[5]);
        const Sint16 sample6 = (Sint16) ((Sint8) src[6]);
        const Sint16 sample7 = (Sint16) ((Sint8) src[7]);
        src += 32;
        dst[0] = (Sint8) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint8) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint8) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint8) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint8) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint8) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint8) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint8) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 1;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 1;
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src--;
        dst[1] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[0] = (Uint16) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src += 2;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 1;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 1;
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src--;
        dst[3] = (Uint16) sample0;
        dst[2] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[1] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src += 4;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 2;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 2;
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src -= 2;
        dst[3] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) sample1;
        dst[0] = (Uint16) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        src += 4;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 2;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 2;
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src -= 2;
        dst[7] = (Uint16) sample1;
        dst[6] = (Uint16) sample0;
        dst[5] = (Uint16) (((3 * sample1) + last_sample1) >> 2);
        dst[4] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[3] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        src += 8;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 4;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 4;
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src -= 4;
        dst[7] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[6] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[5] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[4] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[3] = (Uint16) sample3;
        dst[2] = (Uint16) sample2;
        dst[1] = (Uint16) sample1;
        dst[0] = (Uint16) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        src += 8;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 4;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 4;
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src -= 4;
        dst[15] = (Uint16) sample3;
        dst[14] = (Uint16) sample2;
        dst[13] = (Uint16) sample1;
        dst[12] = (Uint16) sample0;
        dst[11] = (Uint16) (((3 * sample3) + last_sample3) >> 2);
        dst[10] = (Uint16) (((3 * sample2) + last_sample2) >> 2);
        dst[9] = (Uint16) (((3 * sample1) + last_sample1) >> 2);
        dst[8] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[7] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[6] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[5] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[4] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[3] = (Uint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Uint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Uint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        src += 16;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 6;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 6;
    Sint32 last_sample5 = (Sint32) SDL_SwapLE16(src[5]);
    Sint32 last_sample4 = (Sint32) SDL_SwapLE16(src[4]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample5 = (Sint32) SDL_SwapLE16(src[5]);
        const Sint32 sample4 = (Sint32) SDL_SwapLE16(src[4]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src -= 6;
        dst[11] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[10] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[9] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[8] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[7] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[6] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[5] = (Uint16) sample5;
        dst[4] = (Uint16) sample4;
        dst[3] = (Uint16) sample3;
        dst[2] = (Uint16) sample2;
        dst[1] = (Uint16) sample1;
        dst[0] = (Uint16) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample4 = (Sint32) SDL_SwapLE16(src[4]);
    Sint32 last_sample5 = (Sint32) SDL_SwapLE16(src[5]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample4 = (Sint32) SDL_SwapLE16(src[4]);
        const Sint32 sample5 = (Sint32) SDL_SwapLE16(src[5]);
        src += 12;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint16) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 6;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 6;
    Sint32 last_sample5 = (Sint32) SDL_SwapLE16(src[5]);
    Sint32 last_sample4 = (Sint32) SDL_SwapLE16(src[4]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample5 = (Sint32) SDL_SwapLE16(src[5]);
        const Sint32 sample4 = (Sint32) SDL_SwapLE16(src[4]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src -= 6;
        dst[23] = (Uint16) sample5;
        dst[22] = (Uint16) sample4;
        dst[21] = (Uint16) sample3;
        dst[20] = (Uint16) sample2;
        dst[19] = (Uint16) sample1;
        dst[18] = (Uint16) sample0;
        dst[17] = (Uint16) (((3 * sample5) + last_sample5) >> 2);
        dst[16] = (Uint16) (((3 * sample4) + last_sample4) >> 2);
        dst[15] = (Uint16) (((3 * sample3) + last_sample3) >> 2);
        dst[14] = (Uint16) (((3 * sample2) + last_sample2) >> 2);
        dst[13] = (Uint16) (((3 * sample1) + last_sample1) >> 2);
        dst[12] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[11] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[10] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[9] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[8] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[7] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[6] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[5] = (Uint16) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Uint16) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Uint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Uint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Uint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample4 = (Sint32) SDL_SwapLE16(src[4]);
    Sint32 last_sample5 = (Sint32) SDL_SwapLE16(src[5]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample4 = (Sint32) SDL_SwapLE16(src[4]);
        const Sint32 sample5 = (Sint32) SDL_SwapLE16(src[5]);
        src += 24;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint16) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 8;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 8;
    Sint32 last_sample7 = (Sint32) SDL_SwapLE16(src[7]);
    Sint32 last_sample6 = (Sint32) SDL_SwapLE16(src[6]);
    Sint32 last_sample5 = (Sint32) SDL_SwapLE16(src[5]);
    Sint32 last_sample4 = (Sint32) SDL_SwapLE16(src[4]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample7 = (Sint32) SDL_SwapLE16(src[7]);
        const Sint32 sample6 = (Sint32) SDL_SwapLE16(src[6]);
        const Sint32 sample5 = (Sint32) SDL_SwapLE16(src[5]);
        const Sint32 sample4 = (Sint32) SDL_SwapLE16(src[4]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src -= 8;
        dst[15] = (Uint16) ((sample7 + last_sample7) >> 1);
        dst[14] = (Uint16) ((sample6 + last_sample6) >> 1);
        dst[13] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[12] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[11] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[10] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[9] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[8] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[7] = (Uint16) sample7;
        dst[6] = (Uint16) sample6;
        dst[5] = (Uint16) sample5;
        dst[4] = (Uint16) sample4;
        dst[3] = (Uint16) sample3;
        dst[2] = (Uint16) sample2;
        dst[1] = (Uint16) sample1;
        dst[0] = (Uint16) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample4 = (Sint32) SDL_SwapLE16(src[4]);
    Sint32 last_sample5 = (Sint32) SDL_SwapLE16(src[5]);
    Sint32 last_sample6 = (Sint32) SDL_SwapLE16(src[6]);
    Sint32 last_sample7 = (Sint32) SDL_SwapLE16(src[7]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample4 = (Sint32) SDL_SwapLE16(src[4]);
        const Sint32 sample5 = (Sint32) SDL_SwapLE16(src[5]);
        const Sint32 sample6 = (Sint32) SDL_SwapLE16(src[6]);
        const Sint32 sample7 = (Sint32) SDL_SwapLE16(src[7]);
        src += 16;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[6] = (Uint16) ((sample6 + last_sample6) >> 1);
        dst[7] = (Uint16) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16LSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 8;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 8;
    Sint32 last_sample7 = (Sint32) SDL_SwapLE16(src[7]);
    Sint32 last_sample6 = (Sint32) SDL_SwapLE16(src[6]);
    Sint32 last_sample5 = (Sint32) SDL_SwapLE16(src[5]);
    Sint32 last_sample4 = (Sint32) SDL_SwapLE16(src[4]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    while (dst > target) {
        const Sint32 sample7 = (Sint32) SDL_SwapLE16(src[7]);
        const Sint32 sample6 = (Sint32) SDL_SwapLE16(src[6]);
        const Sint32 sample5 = (Sint32) SDL_SwapLE16(src[5]);
        const Sint32 sample4 = (Sint32) SDL_SwapLE16(src[4]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        src -= 8;
        dst[31] = (Uint16) sample7;
        dst[30] = (Uint16) sample6;
        dst[29] = (Uint16) sample5;
        dst[28] = (Uint16) sample4;
        dst[27] = (Uint16) sample3;
        dst[26] = (Uint16) sample2;
        dst[25] = (Uint16) sample1;
        dst[24] = (Uint16) sample0;
        dst[23] = (Uint16) (((3 * sample7) + last_sample7) >> 2);
        dst[22] = (Uint16) (((3 * sample6) + last_sample6) >> 2);
        dst[21] = (Uint16) (((3 * sample5) + last_sample5) >> 2);
        dst[20] = (Uint16) (((3 * sample4) + last_sample4) >> 2);
        dst[19] = (Uint16) (((3 * sample3) + last_sample3) >> 2);
        dst[18] = (Uint16) (((3 * sample2) + last_sample2) >> 2);
        dst[17] = (Uint16) (((3 * sample1) + last_sample1) >> 2);
        dst[16] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[15] = (Uint16) ((sample7 + last_sample7) >> 1);
        dst[14] = (Uint16) ((sample6 + last_sample6) >> 1);
        dst[13] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[12] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[11] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[10] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[9] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[8] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[7] = (Uint16) ((sample7 + (3 * last_sample7)) >> 2);
        dst[6] = (Uint16) ((sample6 + (3 * last_sample6)) >> 2);
        dst[5] = (Uint16) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Uint16) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Uint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Uint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Uint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16LSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapLE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapLE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapLE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapLE16(src[3]);
    Sint32 last_sample4 = (Sint32) SDL_SwapLE16(src[4]);
    Sint32 last_sample5 = (Sint32) SDL_SwapLE16(src[5]);
    Sint32 last_sample6 = (Sint32) SDL_SwapLE16(src[6]);
    Sint32 last_sample7 = (Sint32) SDL_SwapLE16(src[7]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapLE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapLE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapLE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapLE16(src[3]);
        const Sint32 sample4 = (Sint32) SDL_SwapLE16(src[4]);
        const Sint32 sample5 = (Sint32) SDL_SwapLE16(src[5]);
        const Sint32 sample6 = (Sint32) SDL_SwapLE16(src[6]);
        const Sint32 sample7 = (Sint32) SDL_SwapLE16(src[7]);
        src += 32;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[6] = (Uint16) ((sample6 + last_sample6) >> 1);
        dst[7] = (Uint16) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 1;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 1;
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src--;
        dst[1] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint16) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src += 2;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 1;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 1;
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src--;
        dst[3] = (Sint16) sample0;
        dst[2] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[1] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src += 4;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 2;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 2;
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src -= 2;
        dst[3] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) sample1;
        dst[0] = (Sint16) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        src += 4;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 2;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 2;
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src -= 2;
        dst[7] = (Sint16) sample1;
        dst[6] = (Sint16) sample0;
        dst[5] = (Sint16) (((3 * sample1) + last_sample1) >> 2);
        dst[4] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[3] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        src += 8;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 4;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 4;
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src -= 4;
        dst[7] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint16) sample3;
        dst[2] = (Sint16) sample2;
        dst[1] = (Sint16) sample1;
        dst[0] = (Sint16) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        src += 8;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 4;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 4;
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src -= 4;
        dst[15] = (Sint16) sample3;
        dst[14] = (Sint16) sample2;
        dst[13] = (Sint16) sample1;
        dst[12] = (Sint16) sample0;
        dst[11] = (Sint16) (((3 * sample3) + last_sample3) >> 2);
        dst[10] = (Sint16) (((3 * sample2) + last_sample2) >> 2);
        dst[9] = (Sint16) (((3 * sample1) + last_sample1) >> 2);
        dst[8] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[7] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        src += 16;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 6;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 6;
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src -= 6;
        dst[11] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint16) sample5;
        dst[4] = (Sint16) sample4;
        dst[3] = (Sint16) sample3;
        dst[2] = (Sint16) sample2;
        dst[1] = (Sint16) sample1;
        dst[0] = (Sint16) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
        src += 12;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint16) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 6;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 6;
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src -= 6;
        dst[23] = (Sint16) sample5;
        dst[22] = (Sint16) sample4;
        dst[21] = (Sint16) sample3;
        dst[20] = (Sint16) sample2;
        dst[19] = (Sint16) sample1;
        dst[18] = (Sint16) sample0;
        dst[17] = (Sint16) (((3 * sample5) + last_sample5) >> 2);
        dst[16] = (Sint16) (((3 * sample4) + last_sample4) >> 2);
        dst[15] = (Sint16) (((3 * sample3) + last_sample3) >> 2);
        dst[14] = (Sint16) (((3 * sample2) + last_sample2) >> 2);
        dst[13] = (Sint16) (((3 * sample1) + last_sample1) >> 2);
        dst[12] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[11] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint16) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint16) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
        src += 24;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint16) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 8;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 8;
    Sint32 last_sample7 = (Sint32) ((Sint16) SDL_SwapLE16(src[7]));
    Sint32 last_sample6 = (Sint32) ((Sint16) SDL_SwapLE16(src[6]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample7 = (Sint32) ((Sint16) SDL_SwapLE16(src[7]));
        const Sint32 sample6 = (Sint32) ((Sint16) SDL_SwapLE16(src[6]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src -= 8;
        dst[15] = (Sint16) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint16) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint16) sample7;
        dst[6] = (Sint16) sample6;
        dst[5] = (Sint16) sample5;
        dst[4] = (Sint16) sample4;
        dst[3] = (Sint16) sample3;
        dst[2] = (Sint16) sample2;
        dst[1] = (Sint16) sample1;
        dst[0] = (Sint16) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
    Sint32 last_sample6 = (Sint32) ((Sint16) SDL_SwapLE16(src[6]));
    Sint32 last_sample7 = (Sint32) ((Sint16) SDL_SwapLE16(src[7]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
        const Sint32 sample6 = (Sint32) ((Sint16) SDL_SwapLE16(src[6]));
        const Sint32 sample7 = (Sint32) ((Sint16) SDL_SwapLE16(src[7]));
        src += 16;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint16) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint16) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16LSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 8;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 8;
    Sint32 last_sample7 = (Sint32) ((Sint16) SDL_SwapLE16(src[7]));
    Sint32 last_sample6 = (Sint32) ((Sint16) SDL_SwapLE16(src[6]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    while (dst > target) {
        const Sint32 sample7 = (Sint32) ((Sint16) SDL_SwapLE16(src[7]));
        const Sint32 sample6 = (Sint32) ((Sint16) SDL_SwapLE16(src[6]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        src -= 8;
        dst[31] = (Sint16) sample7;
        dst[30] = (Sint16) sample6;
        dst[29] = (Sint16) sample5;
        dst[28] = (Sint16) sample4;
        dst[27] = (Sint16) sample3;
        dst[26] = (Sint16) sample2;
        dst[25] = (Sint16) sample1;
        dst[24] = (Sint16) sample0;
        dst[23] = (Sint16) (((3 * sample7) + last_sample7) >> 2);
        dst[22] = (Sint16) (((3 * sample6) + last_sample6) >> 2);
        dst[21] = (Sint16) (((3 * sample5) + last_sample5) >> 2);
        dst[20] = (Sint16) (((3 * sample4) + last_sample4) >> 2);
        dst[19] = (Sint16) (((3 * sample3) + last_sample3) >> 2);
        dst[18] = (Sint16) (((3 * sample2) + last_sample2) >> 2);
        dst[17] = (Sint16) (((3 * sample1) + last_sample1) >> 2);
        dst[16] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[15] = (Sint16) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint16) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint16) ((sample7 + (3 * last_sample7)) >> 2);
        dst[6] = (Sint16) ((sample6 + (3 * last_sample6)) >> 2);
        dst[5] = (Sint16) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint16) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16LSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
    Sint32 last_sample6 = (Sint32) ((Sint16) SDL_SwapLE16(src[6]));
    Sint32 last_sample7 = (Sint32) ((Sint16) SDL_SwapLE16(src[7]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapLE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapLE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapLE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapLE16(src[3]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapLE16(src[4]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapLE16(src[5]));
        const Sint32 sample6 = (Sint32) ((Sint16) SDL_SwapLE16(src[6]));
        const Sint32 sample7 = (Sint32) ((Sint16) SDL_SwapLE16(src[7]));
        src += 32;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint16) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint16) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 1;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 1;
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src--;
        dst[1] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[0] = (Uint16) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src += 2;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 1;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 1;
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src--;
        dst[3] = (Uint16) sample0;
        dst[2] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[1] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src += 4;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 2;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 2;
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src -= 2;
        dst[3] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) sample1;
        dst[0] = (Uint16) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        src += 4;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 2;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 2;
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src -= 2;
        dst[7] = (Uint16) sample1;
        dst[6] = (Uint16) sample0;
        dst[5] = (Uint16) (((3 * sample1) + last_sample1) >> 2);
        dst[4] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[3] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        src += 8;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 4;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 4;
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src -= 4;
        dst[7] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[6] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[5] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[4] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[3] = (Uint16) sample3;
        dst[2] = (Uint16) sample2;
        dst[1] = (Uint16) sample1;
        dst[0] = (Uint16) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        src += 8;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 4;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 4;
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src -= 4;
        dst[15] = (Uint16) sample3;
        dst[14] = (Uint16) sample2;
        dst[13] = (Uint16) sample1;
        dst[12] = (Uint16) sample0;
        dst[11] = (Uint16) (((3 * sample3) + last_sample3) >> 2);
        dst[10] = (Uint16) (((3 * sample2) + last_sample2) >> 2);
        dst[9] = (Uint16) (((3 * sample1) + last_sample1) >> 2);
        dst[8] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[7] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[6] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[5] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[4] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[3] = (Uint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Uint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Uint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        src += 16;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 6;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 6;
    Sint32 last_sample5 = (Sint32) SDL_SwapBE16(src[5]);
    Sint32 last_sample4 = (Sint32) SDL_SwapBE16(src[4]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample5 = (Sint32) SDL_SwapBE16(src[5]);
        const Sint32 sample4 = (Sint32) SDL_SwapBE16(src[4]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src -= 6;
        dst[11] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[10] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[9] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[8] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[7] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[6] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[5] = (Uint16) sample5;
        dst[4] = (Uint16) sample4;
        dst[3] = (Uint16) sample3;
        dst[2] = (Uint16) sample2;
        dst[1] = (Uint16) sample1;
        dst[0] = (Uint16) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample4 = (Sint32) SDL_SwapBE16(src[4]);
    Sint32 last_sample5 = (Sint32) SDL_SwapBE16(src[5]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample4 = (Sint32) SDL_SwapBE16(src[4]);
        const Sint32 sample5 = (Sint32) SDL_SwapBE16(src[5]);
        src += 12;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint16) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 6;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 6;
    Sint32 last_sample5 = (Sint32) SDL_SwapBE16(src[5]);
    Sint32 last_sample4 = (Sint32) SDL_SwapBE16(src[4]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample5 = (Sint32) SDL_SwapBE16(src[5]);
        const Sint32 sample4 = (Sint32) SDL_SwapBE16(src[4]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src -= 6;
        dst[23] = (Uint16) sample5;
        dst[22] = (Uint16) sample4;
        dst[21] = (Uint16) sample3;
        dst[20] = (Uint16) sample2;
        dst[19] = (Uint16) sample1;
        dst[18] = (Uint16) sample0;
        dst[17] = (Uint16) (((3 * sample5) + last_sample5) >> 2);
        dst[16] = (Uint16) (((3 * sample4) + last_sample4) >> 2);
        dst[15] = (Uint16) (((3 * sample3) + last_sample3) >> 2);
        dst[14] = (Uint16) (((3 * sample2) + last_sample2) >> 2);
        dst[13] = (Uint16) (((3 * sample1) + last_sample1) >> 2);
        dst[12] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[11] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[10] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[9] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[8] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[7] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[6] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[5] = (Uint16) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Uint16) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Uint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Uint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Uint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample4 = (Sint32) SDL_SwapBE16(src[4]);
    Sint32 last_sample5 = (Sint32) SDL_SwapBE16(src[5]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample4 = (Sint32) SDL_SwapBE16(src[4]);
        const Sint32 sample5 = (Sint32) SDL_SwapBE16(src[5]);
        src += 24;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint16) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_U16MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 8;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 8;
    Sint32 last_sample7 = (Sint32) SDL_SwapBE16(src[7]);
    Sint32 last_sample6 = (Sint32) SDL_SwapBE16(src[6]);
    Sint32 last_sample5 = (Sint32) SDL_SwapBE16(src[5]);
    Sint32 last_sample4 = (Sint32) SDL_SwapBE16(src[4]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample7 = (Sint32) SDL_SwapBE16(src[7]);
        const Sint32 sample6 = (Sint32) SDL_SwapBE16(src[6]);
        const Sint32 sample5 = (Sint32) SDL_SwapBE16(src[5]);
        const Sint32 sample4 = (Sint32) SDL_SwapBE16(src[4]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src -= 8;
        dst[15] = (Uint16) ((sample7 + last_sample7) >> 1);
        dst[14] = (Uint16) ((sample6 + last_sample6) >> 1);
        dst[13] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[12] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[11] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[10] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[9] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[8] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[7] = (Uint16) sample7;
        dst[6] = (Uint16) sample6;
        dst[5] = (Uint16) sample5;
        dst[4] = (Uint16) sample4;
        dst[3] = (Uint16) sample3;
        dst[2] = (Uint16) sample2;
        dst[1] = (Uint16) sample1;
        dst[0] = (Uint16) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_U16MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample4 = (Sint32) SDL_SwapBE16(src[4]);
    Sint32 last_sample5 = (Sint32) SDL_SwapBE16(src[5]);
    Sint32 last_sample6 = (Sint32) SDL_SwapBE16(src[6]);
    Sint32 last_sample7 = (Sint32) SDL_SwapBE16(src[7]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample4 = (Sint32) SDL_SwapBE16(src[4]);
        const Sint32 sample5 = (Sint32) SDL_SwapBE16(src[5]);
        const Sint32 sample6 = (Sint32) SDL_SwapBE16(src[6]);
        const Sint32 sample7 = (Sint32) SDL_SwapBE16(src[7]);
        src += 16;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[6] = (Uint16) ((sample6 + last_sample6) >> 1);
        dst[7] = (Uint16) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_U16MSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_U16MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Uint16 *dst = ((Uint16 *) (cvt->buf + dstsize)) - 8;
    const Uint16 *src = ((Uint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Uint16 *target = ((const Uint16 *) cvt->buf) - 8;
    Sint32 last_sample7 = (Sint32) SDL_SwapBE16(src[7]);
    Sint32 last_sample6 = (Sint32) SDL_SwapBE16(src[6]);
    Sint32 last_sample5 = (Sint32) SDL_SwapBE16(src[5]);
    Sint32 last_sample4 = (Sint32) SDL_SwapBE16(src[4]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    while (dst > target) {
        const Sint32 sample7 = (Sint32) SDL_SwapBE16(src[7]);
        const Sint32 sample6 = (Sint32) SDL_SwapBE16(src[6]);
        const Sint32 sample5 = (Sint32) SDL_SwapBE16(src[5]);
        const Sint32 sample4 = (Sint32) SDL_SwapBE16(src[4]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        src -= 8;
        dst[31] = (Uint16) sample7;
        dst[30] = (Uint16) sample6;
        dst[29] = (Uint16) sample5;
        dst[28] = (Uint16) sample4;
        dst[27] = (Uint16) sample3;
        dst[26] = (Uint16) sample2;
        dst[25] = (Uint16) sample1;
        dst[24] = (Uint16) sample0;
        dst[23] = (Uint16) (((3 * sample7) + last_sample7) >> 2);
        dst[22] = (Uint16) (((3 * sample6) + last_sample6) >> 2);
        dst[21] = (Uint16) (((3 * sample5) + last_sample5) >> 2);
        dst[20] = (Uint16) (((3 * sample4) + last_sample4) >> 2);
        dst[19] = (Uint16) (((3 * sample3) + last_sample3) >> 2);
        dst[18] = (Uint16) (((3 * sample2) + last_sample2) >> 2);
        dst[17] = (Uint16) (((3 * sample1) + last_sample1) >> 2);
        dst[16] = (Uint16) (((3 * sample0) + last_sample0) >> 2);
        dst[15] = (Uint16) ((sample7 + last_sample7) >> 1);
        dst[14] = (Uint16) ((sample6 + last_sample6) >> 1);
        dst[13] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[12] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[11] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[10] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[9] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[8] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[7] = (Uint16) ((sample7 + (3 * last_sample7)) >> 2);
        dst[6] = (Uint16) ((sample6 + (3 * last_sample6)) >> 2);
        dst[5] = (Uint16) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Uint16) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Uint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Uint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Uint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Uint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_U16MSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_U16MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Uint16 *dst = (Uint16 *) cvt->buf;
    const Uint16 *src = (Uint16 *) cvt->buf;
    const Uint16 *target = (const Uint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) SDL_SwapBE16(src[0]);
    Sint32 last_sample1 = (Sint32) SDL_SwapBE16(src[1]);
    Sint32 last_sample2 = (Sint32) SDL_SwapBE16(src[2]);
    Sint32 last_sample3 = (Sint32) SDL_SwapBE16(src[3]);
    Sint32 last_sample4 = (Sint32) SDL_SwapBE16(src[4]);
    Sint32 last_sample5 = (Sint32) SDL_SwapBE16(src[5]);
    Sint32 last_sample6 = (Sint32) SDL_SwapBE16(src[6]);
    Sint32 last_sample7 = (Sint32) SDL_SwapBE16(src[7]);
    while (dst < target) {
        const Sint32 sample0 = (Sint32) SDL_SwapBE16(src[0]);
        const Sint32 sample1 = (Sint32) SDL_SwapBE16(src[1]);
        const Sint32 sample2 = (Sint32) SDL_SwapBE16(src[2]);
        const Sint32 sample3 = (Sint32) SDL_SwapBE16(src[3]);
        const Sint32 sample4 = (Sint32) SDL_SwapBE16(src[4]);
        const Sint32 sample5 = (Sint32) SDL_SwapBE16(src[5]);
        const Sint32 sample6 = (Sint32) SDL_SwapBE16(src[6]);
        const Sint32 sample7 = (Sint32) SDL_SwapBE16(src[7]);
        src += 32;
        dst[0] = (Uint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Uint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Uint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Uint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Uint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Uint16) ((sample5 + last_sample5) >> 1);
        dst[6] = (Uint16) ((sample6 + last_sample6) >> 1);
        dst[7] = (Uint16) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 1;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 1;
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src--;
        dst[1] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint16) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src += 2;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 1;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 1;
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src--;
        dst[3] = (Sint16) sample0;
        dst[2] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[1] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src += 4;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 2;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 2;
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src -= 2;
        dst[3] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) sample1;
        dst[0] = (Sint16) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        src += 4;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 2;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 2;
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src -= 2;
        dst[7] = (Sint16) sample1;
        dst[6] = (Sint16) sample0;
        dst[5] = (Sint16) (((3 * sample1) + last_sample1) >> 2);
        dst[4] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[3] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        src += 8;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 4;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 4;
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src -= 4;
        dst[7] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint16) sample3;
        dst[2] = (Sint16) sample2;
        dst[1] = (Sint16) sample1;
        dst[0] = (Sint16) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        src += 8;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 4;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 4;
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src -= 4;
        dst[15] = (Sint16) sample3;
        dst[14] = (Sint16) sample2;
        dst[13] = (Sint16) sample1;
        dst[12] = (Sint16) sample0;
        dst[11] = (Sint16) (((3 * sample3) + last_sample3) >> 2);
        dst[10] = (Sint16) (((3 * sample2) + last_sample2) >> 2);
        dst[9] = (Sint16) (((3 * sample1) + last_sample1) >> 2);
        dst[8] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[7] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        src += 16;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 6;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 6;
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src -= 6;
        dst[11] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint16) sample5;
        dst[4] = (Sint16) sample4;
        dst[3] = (Sint16) sample3;
        dst[2] = (Sint16) sample2;
        dst[1] = (Sint16) sample1;
        dst[0] = (Sint16) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
        src += 12;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint16) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 6;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 6;
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src -= 6;
        dst[23] = (Sint16) sample5;
        dst[22] = (Sint16) sample4;
        dst[21] = (Sint16) sample3;
        dst[20] = (Sint16) sample2;
        dst[19] = (Sint16) sample1;
        dst[18] = (Sint16) sample0;
        dst[17] = (Sint16) (((3 * sample5) + last_sample5) >> 2);
        dst[16] = (Sint16) (((3 * sample4) + last_sample4) >> 2);
        dst[15] = (Sint16) (((3 * sample3) + last_sample3) >> 2);
        dst[14] = (Sint16) (((3 * sample2) + last_sample2) >> 2);
        dst[13] = (Sint16) (((3 * sample1) + last_sample1) >> 2);
        dst[12] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[11] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint16) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint16) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
        src += 24;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint16) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S16MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 8;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 8;
    Sint32 last_sample7 = (Sint32) ((Sint16) SDL_SwapBE16(src[7]));
    Sint32 last_sample6 = (Sint32) ((Sint16) SDL_SwapBE16(src[6]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample7 = (Sint32) ((Sint16) SDL_SwapBE16(src[7]));
        const Sint32 sample6 = (Sint32) ((Sint16) SDL_SwapBE16(src[6]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src -= 8;
        dst[15] = (Sint16) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint16) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint16) sample7;
        dst[6] = (Sint16) sample6;
        dst[5] = (Sint16) sample5;
        dst[4] = (Sint16) sample4;
        dst[3] = (Sint16) sample3;
        dst[2] = (Sint16) sample2;
        dst[1] = (Sint16) sample1;
        dst[0] = (Sint16) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S16MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
    Sint32 last_sample6 = (Sint32) ((Sint16) SDL_SwapBE16(src[6]));
    Sint32 last_sample7 = (Sint32) ((Sint16) SDL_SwapBE16(src[7]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
        const Sint32 sample6 = (Sint32) ((Sint16) SDL_SwapBE16(src[6]));
        const Sint32 sample7 = (Sint32) ((Sint16) SDL_SwapBE16(src[7]));
        src += 16;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint16) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint16) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S16MSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S16MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint16 *dst = ((Sint16 *) (cvt->buf + dstsize)) - 8;
    const Sint16 *src = ((Sint16 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint16 *target = ((const Sint16 *) cvt->buf) - 8;
    Sint32 last_sample7 = (Sint32) ((Sint16) SDL_SwapBE16(src[7]));
    Sint32 last_sample6 = (Sint32) ((Sint16) SDL_SwapBE16(src[6]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    while (dst > target) {
        const Sint32 sample7 = (Sint32) ((Sint16) SDL_SwapBE16(src[7]));
        const Sint32 sample6 = (Sint32) ((Sint16) SDL_SwapBE16(src[6]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        src -= 8;
        dst[31] = (Sint16) sample7;
        dst[30] = (Sint16) sample6;
        dst[29] = (Sint16) sample5;
        dst[28] = (Sint16) sample4;
        dst[27] = (Sint16) sample3;
        dst[26] = (Sint16) sample2;
        dst[25] = (Sint16) sample1;
        dst[24] = (Sint16) sample0;
        dst[23] = (Sint16) (((3 * sample7) + last_sample7) >> 2);
        dst[22] = (Sint16) (((3 * sample6) + last_sample6) >> 2);
        dst[21] = (Sint16) (((3 * sample5) + last_sample5) >> 2);
        dst[20] = (Sint16) (((3 * sample4) + last_sample4) >> 2);
        dst[19] = (Sint16) (((3 * sample3) + last_sample3) >> 2);
        dst[18] = (Sint16) (((3 * sample2) + last_sample2) >> 2);
        dst[17] = (Sint16) (((3 * sample1) + last_sample1) >> 2);
        dst[16] = (Sint16) (((3 * sample0) + last_sample0) >> 2);
        dst[15] = (Sint16) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint16) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint16) ((sample7 + (3 * last_sample7)) >> 2);
        dst[6] = (Sint16) ((sample6 + (3 * last_sample6)) >> 2);
        dst[5] = (Sint16) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint16) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint16) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint16) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint16) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint16) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S16MSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S16MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint16 *dst = (Sint16 *) cvt->buf;
    const Sint16 *src = (Sint16 *) cvt->buf;
    const Sint16 *target = (const Sint16 *) (cvt->buf + dstsize);
    Sint32 last_sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
    Sint32 last_sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
    Sint32 last_sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
    Sint32 last_sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
    Sint32 last_sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
    Sint32 last_sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
    Sint32 last_sample6 = (Sint32) ((Sint16) SDL_SwapBE16(src[6]));
    Sint32 last_sample7 = (Sint32) ((Sint16) SDL_SwapBE16(src[7]));
    while (dst < target) {
        const Sint32 sample0 = (Sint32) ((Sint16) SDL_SwapBE16(src[0]));
        const Sint32 sample1 = (Sint32) ((Sint16) SDL_SwapBE16(src[1]));
        const Sint32 sample2 = (Sint32) ((Sint16) SDL_SwapBE16(src[2]));
        const Sint32 sample3 = (Sint32) ((Sint16) SDL_SwapBE16(src[3]));
        const Sint32 sample4 = (Sint32) ((Sint16) SDL_SwapBE16(src[4]));
        const Sint32 sample5 = (Sint32) ((Sint16) SDL_SwapBE16(src[5]));
        const Sint32 sample6 = (Sint32) ((Sint16) SDL_SwapBE16(src[6]));
        const Sint32 sample7 = (Sint32) ((Sint16) SDL_SwapBE16(src[7]));
        src += 32;
        dst[0] = (Sint16) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint16) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint16) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint16) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint16) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint16) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint16) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint16) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 1;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 1;
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src--;
        dst[1] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint32) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src += 2;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 1;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 1;
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src--;
        dst[3] = (Sint32) sample0;
        dst[2] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[1] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src += 4;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 2;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 2;
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src -= 2;
        dst[3] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) sample1;
        dst[0] = (Sint32) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        src += 4;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 2;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 2;
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src -= 2;
        dst[7] = (Sint32) sample1;
        dst[6] = (Sint32) sample0;
        dst[5] = (Sint32) (((3 * sample1) + last_sample1) >> 2);
        dst[4] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[3] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        src += 8;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 4;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 4;
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src -= 4;
        dst[7] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint32) sample3;
        dst[2] = (Sint32) sample2;
        dst[1] = (Sint32) sample1;
        dst[0] = (Sint32) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        src += 8;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 4;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 4;
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src -= 4;
        dst[15] = (Sint32) sample3;
        dst[14] = (Sint32) sample2;
        dst[13] = (Sint32) sample1;
        dst[12] = (Sint32) sample0;
        dst[11] = (Sint32) (((3 * sample3) + last_sample3) >> 2);
        dst[10] = (Sint32) (((3 * sample2) + last_sample2) >> 2);
        dst[9] = (Sint32) (((3 * sample1) + last_sample1) >> 2);
        dst[8] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[7] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint32) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint32) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint32) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        src += 16;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 6;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 6;
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src -= 6;
        dst[11] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint32) sample5;
        dst[4] = (Sint32) sample4;
        dst[3] = (Sint32) sample3;
        dst[2] = (Sint32) sample2;
        dst[1] = (Sint32) sample1;
        dst[0] = (Sint32) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
        src += 12;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint32) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 6;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 6;
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src -= 6;
        dst[23] = (Sint32) sample5;
        dst[22] = (Sint32) sample4;
        dst[21] = (Sint32) sample3;
        dst[20] = (Sint32) sample2;
        dst[19] = (Sint32) sample1;
        dst[18] = (Sint32) sample0;
        dst[17] = (Sint32) (((3 * sample5) + last_sample5) >> 2);
        dst[16] = (Sint32) (((3 * sample4) + last_sample4) >> 2);
        dst[15] = (Sint32) (((3 * sample3) + last_sample3) >> 2);
        dst[14] = (Sint32) (((3 * sample2) + last_sample2) >> 2);
        dst[13] = (Sint32) (((3 * sample1) + last_sample1) >> 2);
        dst[12] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[11] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint32) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint32) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint32) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint32) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint32) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
        src += 24;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint32) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 8;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 8;
    Sint64 last_sample7 = (Sint64) ((Sint32) SDL_SwapLE32(src[7]));
    Sint64 last_sample6 = (Sint64) ((Sint32) SDL_SwapLE32(src[6]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample7 = (Sint64) ((Sint32) SDL_SwapLE32(src[7]));
        const Sint64 sample6 = (Sint64) ((Sint32) SDL_SwapLE32(src[6]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src -= 8;
        dst[15] = (Sint32) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint32) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint32) sample7;
        dst[6] = (Sint32) sample6;
        dst[5] = (Sint32) sample5;
        dst[4] = (Sint32) sample4;
        dst[3] = (Sint32) sample3;
        dst[2] = (Sint32) sample2;
        dst[1] = (Sint32) sample1;
        dst[0] = (Sint32) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
    Sint64 last_sample6 = (Sint64) ((Sint32) SDL_SwapLE32(src[6]));
    Sint64 last_sample7 = (Sint64) ((Sint32) SDL_SwapLE32(src[7]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
        const Sint64 sample6 = (Sint64) ((Sint32) SDL_SwapLE32(src[6]));
        const Sint64 sample7 = (Sint64) ((Sint32) SDL_SwapLE32(src[7]));
        src += 16;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint32) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint32) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32LSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 8;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 8;
    Sint64 last_sample7 = (Sint64) ((Sint32) SDL_SwapLE32(src[7]));
    Sint64 last_sample6 = (Sint64) ((Sint32) SDL_SwapLE32(src[6]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    while (dst > target) {
        const Sint64 sample7 = (Sint64) ((Sint32) SDL_SwapLE32(src[7]));
        const Sint64 sample6 = (Sint64) ((Sint32) SDL_SwapLE32(src[6]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        src -= 8;
        dst[31] = (Sint32) sample7;
        dst[30] = (Sint32) sample6;
        dst[29] = (Sint32) sample5;
        dst[28] = (Sint32) sample4;
        dst[27] = (Sint32) sample3;
        dst[26] = (Sint32) sample2;
        dst[25] = (Sint32) sample1;
        dst[24] = (Sint32) sample0;
        dst[23] = (Sint32) (((3 * sample7) + last_sample7) >> 2);
        dst[22] = (Sint32) (((3 * sample6) + last_sample6) >> 2);
        dst[21] = (Sint32) (((3 * sample5) + last_sample5) >> 2);
        dst[20] = (Sint32) (((3 * sample4) + last_sample4) >> 2);
        dst[19] = (Sint32) (((3 * sample3) + last_sample3) >> 2);
        dst[18] = (Sint32) (((3 * sample2) + last_sample2) >> 2);
        dst[17] = (Sint32) (((3 * sample1) + last_sample1) >> 2);
        dst[16] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[15] = (Sint32) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint32) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint32) ((sample7 + (3 * last_sample7)) >> 2);
        dst[6] = (Sint32) ((sample6 + (3 * last_sample6)) >> 2);
        dst[5] = (Sint32) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint32) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint32) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint32) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint32) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32LSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
    Sint64 last_sample6 = (Sint64) ((Sint32) SDL_SwapLE32(src[6]));
    Sint64 last_sample7 = (Sint64) ((Sint32) SDL_SwapLE32(src[7]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapLE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapLE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapLE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapLE32(src[3]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapLE32(src[4]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapLE32(src[5]));
        const Sint64 sample6 = (Sint64) ((Sint32) SDL_SwapLE32(src[6]));
        const Sint64 sample7 = (Sint64) ((Sint32) SDL_SwapLE32(src[7]));
        src += 32;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint32) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint32) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 1;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 1;
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src--;
        dst[1] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint32) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src += 2;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 1;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 1;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 1;
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src--;
        dst[3] = (Sint32) sample0;
        dst[2] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[1] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src += 4;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 2;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 2;
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src -= 2;
        dst[3] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) sample1;
        dst[0] = (Sint32) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        src += 4;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 2;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 2;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 2;
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src -= 2;
        dst[7] = (Sint32) sample1;
        dst[6] = (Sint32) sample0;
        dst[5] = (Sint32) (((3 * sample1) + last_sample1) >> 2);
        dst[4] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[3] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        src += 8;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 4;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 4;
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src -= 4;
        dst[7] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint32) sample3;
        dst[2] = (Sint32) sample2;
        dst[1] = (Sint32) sample1;
        dst[0] = (Sint32) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        src += 8;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 4;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 4;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 4;
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src -= 4;
        dst[15] = (Sint32) sample3;
        dst[14] = (Sint32) sample2;
        dst[13] = (Sint32) sample1;
        dst[12] = (Sint32) sample0;
        dst[11] = (Sint32) (((3 * sample3) + last_sample3) >> 2);
        dst[10] = (Sint32) (((3 * sample2) + last_sample2) >> 2);
        dst[9] = (Sint32) (((3 * sample1) + last_sample1) >> 2);
        dst[8] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[7] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[6] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[5] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[4] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[3] = (Sint32) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint32) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint32) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        src += 16;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 6;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 6;
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src -= 6;
        dst[11] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint32) sample5;
        dst[4] = (Sint32) sample4;
        dst[3] = (Sint32) sample3;
        dst[2] = (Sint32) sample2;
        dst[1] = (Sint32) sample1;
        dst[0] = (Sint32) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
        src += 12;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint32) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 6;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 6;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 6;
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src -= 6;
        dst[23] = (Sint32) sample5;
        dst[22] = (Sint32) sample4;
        dst[21] = (Sint32) sample3;
        dst[20] = (Sint32) sample2;
        dst[19] = (Sint32) sample1;
        dst[18] = (Sint32) sample0;
        dst[17] = (Sint32) (((3 * sample5) + last_sample5) >> 2);
        dst[16] = (Sint32) (((3 * sample4) + last_sample4) >> 2);
        dst[15] = (Sint32) (((3 * sample3) + last_sample3) >> 2);
        dst[14] = (Sint32) (((3 * sample2) + last_sample2) >> 2);
        dst[13] = (Sint32) (((3 * sample1) + last_sample1) >> 2);
        dst[12] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[11] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[10] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[9] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[8] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[7] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[6] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[5] = (Sint32) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint32) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint32) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint32) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint32) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
        src += 24;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint32) ((sample5 + last_sample5) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_S32MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 8;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 8;
    Sint64 last_sample7 = (Sint64) ((Sint32) SDL_SwapBE32(src[7]));
    Sint64 last_sample6 = (Sint64) ((Sint32) SDL_SwapBE32(src[6]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample7 = (Sint64) ((Sint32) SDL_SwapBE32(src[7]));
        const Sint64 sample6 = (Sint64) ((Sint32) SDL_SwapBE32(src[6]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src -= 8;
        dst[15] = (Sint32) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint32) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint32) sample7;
        dst[6] = (Sint32) sample6;
        dst[5] = (Sint32) sample5;
        dst[4] = (Sint32) sample4;
        dst[3] = (Sint32) sample3;
        dst[2] = (Sint32) sample2;
        dst[1] = (Sint32) sample1;
        dst[0] = (Sint32) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_S32MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
    Sint64 last_sample6 = (Sint64) ((Sint32) SDL_SwapBE32(src[6]));
    Sint64 last_sample7 = (Sint64) ((Sint32) SDL_SwapBE32(src[7]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
        const Sint64 sample6 = (Sint64) ((Sint32) SDL_SwapBE32(src[6]));
        const Sint64 sample7 = (Sint64) ((Sint32) SDL_SwapBE32(src[7]));
        src += 16;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint32) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint32) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_S32MSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_S32MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    Sint32 *dst = ((Sint32 *) (cvt->buf + dstsize)) - 8;
    const Sint32 *src = ((Sint32 *) (cvt->buf + cvt->len_cvt)) - 8;
    const Sint32 *target = ((const Sint32 *) cvt->buf) - 8;
    Sint64 last_sample7 = (Sint64) ((Sint32) SDL_SwapBE32(src[7]));
    Sint64 last_sample6 = (Sint64) ((Sint32) SDL_SwapBE32(src[6]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    while (dst > target) {
        const Sint64 sample7 = (Sint64) ((Sint32) SDL_SwapBE32(src[7]));
        const Sint64 sample6 = (Sint64) ((Sint32) SDL_SwapBE32(src[6]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        src -= 8;
        dst[31] = (Sint32) sample7;
        dst[30] = (Sint32) sample6;
        dst[29] = (Sint32) sample5;
        dst[28] = (Sint32) sample4;
        dst[27] = (Sint32) sample3;
        dst[26] = (Sint32) sample2;
        dst[25] = (Sint32) sample1;
        dst[24] = (Sint32) sample0;
        dst[23] = (Sint32) (((3 * sample7) + last_sample7) >> 2);
        dst[22] = (Sint32) (((3 * sample6) + last_sample6) >> 2);
        dst[21] = (Sint32) (((3 * sample5) + last_sample5) >> 2);
        dst[20] = (Sint32) (((3 * sample4) + last_sample4) >> 2);
        dst[19] = (Sint32) (((3 * sample3) + last_sample3) >> 2);
        dst[18] = (Sint32) (((3 * sample2) + last_sample2) >> 2);
        dst[17] = (Sint32) (((3 * sample1) + last_sample1) >> 2);
        dst[16] = (Sint32) (((3 * sample0) + last_sample0) >> 2);
        dst[15] = (Sint32) ((sample7 + last_sample7) >> 1);
        dst[14] = (Sint32) ((sample6 + last_sample6) >> 1);
        dst[13] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[12] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[11] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[10] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[9] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[8] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[7] = (Sint32) ((sample7 + (3 * last_sample7)) >> 2);
        dst[6] = (Sint32) ((sample6 + (3 * last_sample6)) >> 2);
        dst[5] = (Sint32) ((sample5 + (3 * last_sample5)) >> 2);
        dst[4] = (Sint32) ((sample4 + (3 * last_sample4)) >> 2);
        dst[3] = (Sint32) ((sample3 + (3 * last_sample3)) >> 2);
        dst[2] = (Sint32) ((sample2 + (3 * last_sample2)) >> 2);
        dst[1] = (Sint32) ((sample1 + (3 * last_sample1)) >> 2);
        dst[0] = (Sint32) ((sample0 + (3 * last_sample0)) >> 2);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_S32MSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_S32MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    Sint32 *dst = (Sint32 *) cvt->buf;
    const Sint32 *src = (Sint32 *) cvt->buf;
    const Sint32 *target = (const Sint32 *) (cvt->buf + dstsize);
    Sint64 last_sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
    Sint64 last_sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
    Sint64 last_sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
    Sint64 last_sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
    Sint64 last_sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
    Sint64 last_sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
    Sint64 last_sample6 = (Sint64) ((Sint32) SDL_SwapBE32(src[6]));
    Sint64 last_sample7 = (Sint64) ((Sint32) SDL_SwapBE32(src[7]));
    while (dst < target) {
        const Sint64 sample0 = (Sint64) ((Sint32) SDL_SwapBE32(src[0]));
        const Sint64 sample1 = (Sint64) ((Sint32) SDL_SwapBE32(src[1]));
        const Sint64 sample2 = (Sint64) ((Sint32) SDL_SwapBE32(src[2]));
        const Sint64 sample3 = (Sint64) ((Sint32) SDL_SwapBE32(src[3]));
        const Sint64 sample4 = (Sint64) ((Sint32) SDL_SwapBE32(src[4]));
        const Sint64 sample5 = (Sint64) ((Sint32) SDL_SwapBE32(src[5]));
        const Sint64 sample6 = (Sint64) ((Sint32) SDL_SwapBE32(src[6]));
        const Sint64 sample7 = (Sint64) ((Sint32) SDL_SwapBE32(src[7]));
        src += 32;
        dst[0] = (Sint32) ((sample0 + last_sample0) >> 1);
        dst[1] = (Sint32) ((sample1 + last_sample1) >> 1);
        dst[2] = (Sint32) ((sample2 + last_sample2) >> 1);
        dst[3] = (Sint32) ((sample3 + last_sample3) >> 1);
        dst[4] = (Sint32) ((sample4 + last_sample4) >> 1);
        dst[5] = (Sint32) ((sample5 + last_sample5) >> 1);
        dst[6] = (Sint32) ((sample6 + last_sample6) >> 1);
        dst[7] = (Sint32) ((sample7 + last_sample7) >> 1);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 1;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 1;
    const float *target = ((const float *) cvt->buf) - 1;
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src--;
        dst[1] = (float) ((sample0 + last_sample0) * 0.5);
        dst[0] = (float) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src += 2;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 1;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 1;
    const float *target = ((const float *) cvt->buf) - 1;
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src--;
        dst[3] = (float) sample0;
        dst[2] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[1] = (float) ((sample0 + last_sample0) * 0.5);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32LSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src += 4;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 2;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 2;
    const float *target = ((const float *) cvt->buf) - 2;
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src -= 2;
        dst[3] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) sample1;
        dst[0] = (float) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        src += 4;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 2;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 2;
    const float *target = ((const float *) cvt->buf) - 2;
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src -= 2;
        dst[7] = (float) sample1;
        dst[6] = (float) sample0;
        dst[5] = (float) (((3.0 * sample1) + last_sample1) * 0.25);
        dst[4] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[3] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + (3.0 * last_sample1)) * 0.25);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32LSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        src += 8;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 4;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 4;
    const float *target = ((const float *) cvt->buf) - 4;
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src -= 4;
        dst[7] = (float) ((sample3 + last_sample3) * 0.5);
        dst[6] = (float) ((sample2 + last_sample2) * 0.5);
        dst[5] = (float) ((sample1 + last_sample1) * 0.5);
        dst[4] = (float) ((sample0 + last_sample0) * 0.5);
        dst[3] = (float) sample3;
        dst[2] = (float) sample2;
        dst[1] = (float) sample1;
        dst[0] = (float) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        src += 8;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 4;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 4;
    const float *target = ((const float *) cvt->buf) - 4;
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src -= 4;
        dst[15] = (float) sample3;
        dst[14] = (float) sample2;
        dst[13] = (float) sample1;
        dst[12] = (float) sample0;
        dst[11] = (float) (((3.0 * sample3) + last_sample3) * 0.25);
        dst[10] = (float) (((3.0 * sample2) + last_sample2) * 0.25);
        dst[9] = (float) (((3.0 * sample1) + last_sample1) * 0.25);
        dst[8] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[7] = (float) ((sample3 + last_sample3) * 0.5);
        dst[6] = (float) ((sample2 + last_sample2) * 0.5);
        dst[5] = (float) ((sample1 + last_sample1) * 0.5);
        dst[4] = (float) ((sample0 + last_sample0) * 0.5);
        dst[3] = (float) ((sample3 + (3.0 * last_sample3)) * 0.25);
        dst[2] = (float) ((sample2 + (3.0 * last_sample2)) * 0.25);
        dst[1] = (float) ((sample1 + (3.0 * last_sample1)) * 0.25);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32LSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        src += 16;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 6;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 6;
    const float *target = ((const float *) cvt->buf) - 6;
    double last_sample5 = (double) SDL_SwapFloatLE(src[5]);
    double last_sample4 = (double) SDL_SwapFloatLE(src[4]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample5 = (double) SDL_SwapFloatLE(src[5]);
        const double sample4 = (double) SDL_SwapFloatLE(src[4]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src -= 6;
        dst[11] = (float) ((sample5 + last_sample5) * 0.5);
        dst[10] = (float) ((sample4 + last_sample4) * 0.5);
        dst[9] = (float) ((sample3 + last_sample3) * 0.5);
        dst[8] = (float) ((sample2 + last_sample2) * 0.5);
        dst[7] = (float) ((sample1 + last_sample1) * 0.5);
        dst[6] = (float) ((sample0 + last_sample0) * 0.5);
        dst[5] = (float) sample5;
        dst[4] = (float) sample4;
        dst[3] = (float) sample3;
        dst[2] = (float) sample2;
        dst[1] = (float) sample1;
        dst[0] = (float) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample4 = (double) SDL_SwapFloatLE(src[4]);
    double last_sample5 = (double) SDL_SwapFloatLE(src[5]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample4 = (double) SDL_SwapFloatLE(src[4]);
        const double sample5 = (double) SDL_SwapFloatLE(src[5]);
        src += 12;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        dst[4] = (float) ((sample4 + last_sample4) * 0.5);
        dst[5] = (float) ((sample5 + last_sample5) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 6;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 6;
    const float *target = ((const float *) cvt->buf) - 6;
    double last_sample5 = (double) SDL_SwapFloatLE(src[5]);
    double last_sample4 = (double) SDL_SwapFloatLE(src[4]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample5 = (double) SDL_SwapFloatLE(src[5]);
        const double sample4 = (double) SDL_SwapFloatLE(src[4]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src -= 6;
        dst[23] = (float) sample5;
        dst[22] = (float) sample4;
        dst[21] = (float) sample3;
        dst[20] = (float) sample2;
        dst[19] = (float) sample1;
        dst[18] = (float) sample0;
        dst[17] = (float) (((3.0 * sample5) + last_sample5) * 0.25);
        dst[16] = (float) (((3.0 * sample4) + last_sample4) * 0.25);
        dst[15] = (float) (((3.0 * sample3) + last_sample3) * 0.25);
        dst[14] = (float) (((3.0 * sample2) + last_sample2) * 0.25);
        dst[13] = (float) (((3.0 * sample1) + last_sample1) * 0.25);
        dst[12] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[11] = (float) ((sample5 + last_sample5) * 0.5);
        dst[10] = (float) ((sample4 + last_sample4) * 0.5);
        dst[9] = (float) ((sample3 + last_sample3) * 0.5);
        dst[8] = (float) ((sample2 + last_sample2) * 0.5);
        dst[7] = (float) ((sample1 + last_sample1) * 0.5);
        dst[6] = (float) ((sample0 + last_sample0) * 0.5);
        dst[5] = (float) ((sample5 + (3.0 * last_sample5)) * 0.25);
        dst[4] = (float) ((sample4 + (3.0 * last_sample4)) * 0.25);
        dst[3] = (float) ((sample3 + (3.0 * last_sample3)) * 0.25);
        dst[2] = (float) ((sample2 + (3.0 * last_sample2)) * 0.25);
        dst[1] = (float) ((sample1 + (3.0 * last_sample1)) * 0.25);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32LSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample4 = (double) SDL_SwapFloatLE(src[4]);
    double last_sample5 = (double) SDL_SwapFloatLE(src[5]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample4 = (double) SDL_SwapFloatLE(src[4]);
        const double sample5 = (double) SDL_SwapFloatLE(src[5]);
        src += 24;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        dst[4] = (float) ((sample4 + last_sample4) * 0.5);
        dst[5] = (float) ((sample5 + last_sample5) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 8;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 8;
    const float *target = ((const float *) cvt->buf) - 8;
    double last_sample7 = (double) SDL_SwapFloatLE(src[7]);
    double last_sample6 = (double) SDL_SwapFloatLE(src[6]);
    double last_sample5 = (double) SDL_SwapFloatLE(src[5]);
    double last_sample4 = (double) SDL_SwapFloatLE(src[4]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample7 = (double) SDL_SwapFloatLE(src[7]);
        const double sample6 = (double) SDL_SwapFloatLE(src[6]);
        const double sample5 = (double) SDL_SwapFloatLE(src[5]);
        const double sample4 = (double) SDL_SwapFloatLE(src[4]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src -= 8;
        dst[15] = (float) ((sample7 + last_sample7) * 0.5);
        dst[14] = (float) ((sample6 + last_sample6) * 0.5);
        dst[13] = (float) ((sample5 + last_sample5) * 0.5);
        dst[12] = (float) ((sample4 + last_sample4) * 0.5);
        dst[11] = (float) ((sample3 + last_sample3) * 0.5);
        dst[10] = (float) ((sample2 + last_sample2) * 0.5);
        dst[9] = (float) ((sample1 + last_sample1) * 0.5);
        dst[8] = (float) ((sample0 + last_sample0) * 0.5);
        dst[7] = (float) sample7;
        dst[6] = (float) sample6;
        dst[5] = (float) sample5;
        dst[4] = (float) sample4;
        dst[3] = (float) sample3;
        dst[2] = (float) sample2;
        dst[1] = (float) sample1;
        dst[0] = (float) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample4 = (double) SDL_SwapFloatLE(src[4]);
    double last_sample5 = (double) SDL_SwapFloatLE(src[5]);
    double last_sample6 = (double) SDL_SwapFloatLE(src[6]);
    double last_sample7 = (double) SDL_SwapFloatLE(src[7]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample4 = (double) SDL_SwapFloatLE(src[4]);
        const double sample5 = (double) SDL_SwapFloatLE(src[5]);
        const double sample6 = (double) SDL_SwapFloatLE(src[6]);
        const double sample7 = (double) SDL_SwapFloatLE(src[7]);
        src += 16;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        dst[4] = (float) ((sample4 + last_sample4) * 0.5);
        dst[5] = (float) ((sample5 + last_sample5) * 0.5);
        dst[6] = (float) ((sample6 + last_sample6) * 0.5);
        dst[7] = (float) ((sample7 + last_sample7) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32LSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 8;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 8;
    const float *target = ((const float *) cvt->buf) - 8;
    double last_sample7 = (double) SDL_SwapFloatLE(src[7]);
    double last_sample6 = (double) SDL_SwapFloatLE(src[6]);
    double last_sample5 = (double) SDL_SwapFloatLE(src[5]);
    double last_sample4 = (double) SDL_SwapFloatLE(src[4]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    while (dst > target) {
        const double sample7 = (double) SDL_SwapFloatLE(src[7]);
        const double sample6 = (double) SDL_SwapFloatLE(src[6]);
        const double sample5 = (double) SDL_SwapFloatLE(src[5]);
        const double sample4 = (double) SDL_SwapFloatLE(src[4]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        src -= 8;
        dst[31] = (float) sample7;
        dst[30] = (float) sample6;
        dst[29] = (float) sample5;
        dst[28] = (float) sample4;
        dst[27] = (float) sample3;
        dst[26] = (float) sample2;
        dst[25] = (float) sample1;
        dst[24] = (float) sample0;
        dst[23] = (float) (((3.0 * sample7) + last_sample7) * 0.25);
        dst[22] = (float) (((3.0 * sample6) + last_sample6) * 0.25);
        dst[21] = (float) (((3.0 * sample5) + last_sample5) * 0.25);
        dst[20] = (float) (((3.0 * sample4) + last_sample4) * 0.25);
        dst[19] = (float) (((3.0 * sample3) + last_sample3) * 0.25);
        dst[18] = (float) (((3.0 * sample2) + last_sample2) * 0.25);
        dst[17] = (float) (((3.0 * sample1) + last_sample1) * 0.25);
        dst[16] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[15] = (float) ((sample7 + last_sample7) * 0.5);
        dst[14] = (float) ((sample6 + last_sample6) * 0.5);
        dst[13] = (float) ((sample5 + last_sample5) * 0.5);
        dst[12] = (float) ((sample4 + last_sample4) * 0.5);
        dst[11] = (float) ((sample3 + last_sample3) * 0.5);
        dst[10] = (float) ((sample2 + last_sample2) * 0.5);
        dst[9] = (float) ((sample1 + last_sample1) * 0.5);
        dst[8] = (float) ((sample0 + last_sample0) * 0.5);
        dst[7] = (float) ((sample7 + (3.0 * last_sample7)) * 0.25);
        dst[6] = (float) ((sample6 + (3.0 * last_sample6)) * 0.25);
        dst[5] = (float) ((sample5 + (3.0 * last_sample5)) * 0.25);
        dst[4] = (float) ((sample4 + (3.0 * last_sample4)) * 0.25);
        dst[3] = (float) ((sample3 + (3.0 * last_sample3)) * 0.25);
        dst[2] = (float) ((sample2 + (3.0 * last_sample2)) * 0.25);
        dst[1] = (float) ((sample1 + (3.0 * last_sample1)) * 0.25);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32LSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32LSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatLE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatLE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatLE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatLE(src[3]);
    double last_sample4 = (double) SDL_SwapFloatLE(src[4]);
    double last_sample5 = (double) SDL_SwapFloatLE(src[5]);
    double last_sample6 = (double) SDL_SwapFloatLE(src[6]);
    double last_sample7 = (double) SDL_SwapFloatLE(src[7]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatLE(src[0]);
        const double sample1 = (double) SDL_SwapFloatLE(src[1]);
        const double sample2 = (double) SDL_SwapFloatLE(src[2]);
        const double sample3 = (double) SDL_SwapFloatLE(src[3]);
        const double sample4 = (double) SDL_SwapFloatLE(src[4]);
        const double sample5 = (double) SDL_SwapFloatLE(src[5]);
        const double sample6 = (double) SDL_SwapFloatLE(src[6]);
        const double sample7 = (double) SDL_SwapFloatLE(src[7]);
        src += 32;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        dst[4] = (float) ((sample4 + last_sample4) * 0.5);
        dst[5] = (float) ((sample5 + last_sample5) * 0.5);
        dst[6] = (float) ((sample6 + last_sample6) * 0.5);
        dst[7] = (float) ((sample7 + last_sample7) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 1;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 1;
    const float *target = ((const float *) cvt->buf) - 1;
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src--;
        dst[1] = (float) ((sample0 + last_sample0) * 0.5);
        dst[0] = (float) sample0;
        last_sample0 = sample0;
        dst -= 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_1c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src += 2;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 1;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 1;
    const float *target = ((const float *) cvt->buf) - 1;
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src--;
        dst[3] = (float) sample0;
        dst[2] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[1] = (float) ((sample0 + last_sample0) * 0.5);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_1c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32MSB, 1 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src += 4;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        last_sample0 = sample0;
        dst++;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 2;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 2;
    const float *target = ((const float *) cvt->buf) - 2;
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src -= 2;
        dst[3] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) sample1;
        dst[0] = (float) sample0;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_2c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        src += 4;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 2;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 2;
    const float *target = ((const float *) cvt->buf) - 2;
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src -= 2;
        dst[7] = (float) sample1;
        dst[6] = (float) sample0;
        dst[5] = (float) (((3.0 * sample1) + last_sample1) * 0.25);
        dst[4] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[3] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + (3.0 * last_sample1)) * 0.25);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_2c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32MSB, 2 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        src += 8;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        dst += 2;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 4;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 4;
    const float *target = ((const float *) cvt->buf) - 4;
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src -= 4;
        dst[7] = (float) ((sample3 + last_sample3) * 0.5);
        dst[6] = (float) ((sample2 + last_sample2) * 0.5);
        dst[5] = (float) ((sample1 + last_sample1) * 0.5);
        dst[4] = (float) ((sample0 + last_sample0) * 0.5);
        dst[3] = (float) sample3;
        dst[2] = (float) sample2;
        dst[1] = (float) sample1;
        dst[0] = (float) sample0;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_4c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        src += 8;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 4;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 4;
    const float *target = ((const float *) cvt->buf) - 4;
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src -= 4;
        dst[15] = (float) sample3;
        dst[14] = (float) sample2;
        dst[13] = (float) sample1;
        dst[12] = (float) sample0;
        dst[11] = (float) (((3.0 * sample3) + last_sample3) * 0.25);
        dst[10] = (float) (((3.0 * sample2) + last_sample2) * 0.25);
        dst[9] = (float) (((3.0 * sample1) + last_sample1) * 0.25);
        dst[8] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[7] = (float) ((sample3 + last_sample3) * 0.5);
        dst[6] = (float) ((sample2 + last_sample2) * 0.5);
        dst[5] = (float) ((sample1 + last_sample1) * 0.5);
        dst[4] = (float) ((sample0 + last_sample0) * 0.5);
        dst[3] = (float) ((sample3 + (3.0 * last_sample3)) * 0.25);
        dst[2] = (float) ((sample2 + (3.0 * last_sample2)) * 0.25);
        dst[1] = (float) ((sample1 + (3.0 * last_sample1)) * 0.25);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_4c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32MSB, 4 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        src += 16;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        dst += 4;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 6;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 6;
    const float *target = ((const float *) cvt->buf) - 6;
    double last_sample5 = (double) SDL_SwapFloatBE(src[5]);
    double last_sample4 = (double) SDL_SwapFloatBE(src[4]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample5 = (double) SDL_SwapFloatBE(src[5]);
        const double sample4 = (double) SDL_SwapFloatBE(src[4]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src -= 6;
        dst[11] = (float) ((sample5 + last_sample5) * 0.5);
        dst[10] = (float) ((sample4 + last_sample4) * 0.5);
        dst[9] = (float) ((sample3 + last_sample3) * 0.5);
        dst[8] = (float) ((sample2 + last_sample2) * 0.5);
        dst[7] = (float) ((sample1 + last_sample1) * 0.5);
        dst[6] = (float) ((sample0 + last_sample0) * 0.5);
        dst[5] = (float) sample5;
        dst[4] = (float) sample4;
        dst[3] = (float) sample3;
        dst[2] = (float) sample2;
        dst[1] = (float) sample1;
        dst[0] = (float) sample0;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 12;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_6c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample4 = (double) SDL_SwapFloatBE(src[4]);
    double last_sample5 = (double) SDL_SwapFloatBE(src[5]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample4 = (double) SDL_SwapFloatBE(src[4]);
        const double sample5 = (double) SDL_SwapFloatBE(src[5]);
        src += 12;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        dst[4] = (float) ((sample4 + last_sample4) * 0.5);
        dst[5] = (float) ((sample5 + last_sample5) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 6;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 6;
    const float *target = ((const float *) cvt->buf) - 6;
    double last_sample5 = (double) SDL_SwapFloatBE(src[5]);
    double last_sample4 = (double) SDL_SwapFloatBE(src[4]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample5 = (double) SDL_SwapFloatBE(src[5]);
        const double sample4 = (double) SDL_SwapFloatBE(src[4]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src -= 6;
        dst[23] = (float) sample5;
        dst[22] = (float) sample4;
        dst[21] = (float) sample3;
        dst[20] = (float) sample2;
        dst[19] = (float) sample1;
        dst[18] = (float) sample0;
        dst[17] = (float) (((3.0 * sample5) + last_sample5) * 0.25);
        dst[16] = (float) (((3.0 * sample4) + last_sample4) * 0.25);
        dst[15] = (float) (((3.0 * sample3) + last_sample3) * 0.25);
        dst[14] = (float) (((3.0 * sample2) + last_sample2) * 0.25);
        dst[13] = (float) (((3.0 * sample1) + last_sample1) * 0.25);
        dst[12] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[11] = (float) ((sample5 + last_sample5) * 0.5);
        dst[10] = (float) ((sample4 + last_sample4) * 0.5);
        dst[9] = (float) ((sample3 + last_sample3) * 0.5);
        dst[8] = (float) ((sample2 + last_sample2) * 0.5);
        dst[7] = (float) ((sample1 + last_sample1) * 0.5);
        dst[6] = (float) ((sample0 + last_sample0) * 0.5);
        dst[5] = (float) ((sample5 + (3.0 * last_sample5)) * 0.25);
        dst[4] = (float) ((sample4 + (3.0 * last_sample4)) * 0.25);
        dst[3] = (float) ((sample3 + (3.0 * last_sample3)) * 0.25);
        dst[2] = (float) ((sample2 + (3.0 * last_sample2)) * 0.25);
        dst[1] = (float) ((sample1 + (3.0 * last_sample1)) * 0.25);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 24;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_6c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32MSB, 6 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample4 = (double) SDL_SwapFloatBE(src[4]);
    double last_sample5 = (double) SDL_SwapFloatBE(src[5]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample4 = (double) SDL_SwapFloatBE(src[4]);
        const double sample5 = (double) SDL_SwapFloatBE(src[5]);
        src += 24;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        dst[4] = (float) ((sample4 + last_sample4) * 0.5);
        dst[5] = (float) ((sample5 + last_sample5) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        dst += 6;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x2) AUDIO_F32MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 2;
    float *dst = ((float *) (cvt->buf + dstsize)) - 8;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 8;
    const float *target = ((const float *) cvt->buf) - 8;
    double last_sample7 = (double) SDL_SwapFloatBE(src[7]);
    double last_sample6 = (double) SDL_SwapFloatBE(src[6]);
    double last_sample5 = (double) SDL_SwapFloatBE(src[5]);
    double last_sample4 = (double) SDL_SwapFloatBE(src[4]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample7 = (double) SDL_SwapFloatBE(src[7]);
        const double sample6 = (double) SDL_SwapFloatBE(src[6]);
        const double sample5 = (double) SDL_SwapFloatBE(src[5]);
        const double sample4 = (double) SDL_SwapFloatBE(src[4]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src -= 8;
        dst[15] = (float) ((sample7 + last_sample7) * 0.5);
        dst[14] = (float) ((sample6 + last_sample6) * 0.5);
        dst[13] = (float) ((sample5 + last_sample5) * 0.5);
        dst[12] = (float) ((sample4 + last_sample4) * 0.5);
        dst[11] = (float) ((sample3 + last_sample3) * 0.5);
        dst[10] = (float) ((sample2 + last_sample2) * 0.5);
        dst[9] = (float) ((sample1 + last_sample1) * 0.5);
        dst[8] = (float) ((sample0 + last_sample0) * 0.5);
        dst[7] = (float) sample7;
        dst[6] = (float) sample6;
        dst[5] = (float) sample5;
        dst[4] = (float) sample4;
        dst[3] = (float) sample3;
        dst[2] = (float) sample2;
        dst[1] = (float) sample1;
        dst[0] = (float) sample0;
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 16;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_8c_x2(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x2) AUDIO_F32MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 2;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample4 = (double) SDL_SwapFloatBE(src[4]);
    double last_sample5 = (double) SDL_SwapFloatBE(src[5]);
    double last_sample6 = (double) SDL_SwapFloatBE(src[6]);
    double last_sample7 = (double) SDL_SwapFloatBE(src[7]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample4 = (double) SDL_SwapFloatBE(src[4]);
        const double sample5 = (double) SDL_SwapFloatBE(src[5]);
        const double sample6 = (double) SDL_SwapFloatBE(src[6]);
        const double sample7 = (double) SDL_SwapFloatBE(src[7]);
        src += 16;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        dst[4] = (float) ((sample4 + last_sample4) * 0.5);
        dst[5] = (float) ((sample5 + last_sample5) * 0.5);
        dst[6] = (float) ((sample6 + last_sample6) * 0.5);
        dst[7] = (float) ((sample7 + last_sample7) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Upsample_F32MSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Upsample (x4) AUDIO_F32MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt * 4;
    float *dst = ((float *) (cvt->buf + dstsize)) - 8;
    const float *src = ((float *) (cvt->buf + cvt->len_cvt)) - 8;
    const float *target = ((const float *) cvt->buf) - 8;
    double last_sample7 = (double) SDL_SwapFloatBE(src[7]);
    double last_sample6 = (double) SDL_SwapFloatBE(src[6]);
    double last_sample5 = (double) SDL_SwapFloatBE(src[5]);
    double last_sample4 = (double) SDL_SwapFloatBE(src[4]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    while (dst > target) {
        const double sample7 = (double) SDL_SwapFloatBE(src[7]);
        const double sample6 = (double) SDL_SwapFloatBE(src[6]);
        const double sample5 = (double) SDL_SwapFloatBE(src[5]);
        const double sample4 = (double) SDL_SwapFloatBE(src[4]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        src -= 8;
        dst[31] = (float) sample7;
        dst[30] = (float) sample6;
        dst[29] = (float) sample5;
        dst[28] = (float) sample4;
        dst[27] = (float) sample3;
        dst[26] = (float) sample2;
        dst[25] = (float) sample1;
        dst[24] = (float) sample0;
        dst[23] = (float) (((3.0 * sample7) + last_sample7) * 0.25);
        dst[22] = (float) (((3.0 * sample6) + last_sample6) * 0.25);
        dst[21] = (float) (((3.0 * sample5) + last_sample5) * 0.25);
        dst[20] = (float) (((3.0 * sample4) + last_sample4) * 0.25);
        dst[19] = (float) (((3.0 * sample3) + last_sample3) * 0.25);
        dst[18] = (float) (((3.0 * sample2) + last_sample2) * 0.25);
        dst[17] = (float) (((3.0 * sample1) + last_sample1) * 0.25);
        dst[16] = (float) (((3.0 * sample0) + last_sample0) * 0.25);
        dst[15] = (float) ((sample7 + last_sample7) * 0.5);
        dst[14] = (float) ((sample6 + last_sample6) * 0.5);
        dst[13] = (float) ((sample5 + last_sample5) * 0.5);
        dst[12] = (float) ((sample4 + last_sample4) * 0.5);
        dst[11] = (float) ((sample3 + last_sample3) * 0.5);
        dst[10] = (float) ((sample2 + last_sample2) * 0.5);
        dst[9] = (float) ((sample1 + last_sample1) * 0.5);
        dst[8] = (float) ((sample0 + last_sample0) * 0.5);
        dst[7] = (float) ((sample7 + (3.0 * last_sample7)) * 0.25);
        dst[6] = (float) ((sample6 + (3.0 * last_sample6)) * 0.25);
        dst[5] = (float) ((sample5 + (3.0 * last_sample5)) * 0.25);
        dst[4] = (float) ((sample4 + (3.0 * last_sample4)) * 0.25);
        dst[3] = (float) ((sample3 + (3.0 * last_sample3)) * 0.25);
        dst[2] = (float) ((sample2 + (3.0 * last_sample2)) * 0.25);
        dst[1] = (float) ((sample1 + (3.0 * last_sample1)) * 0.25);
        dst[0] = (float) ((sample0 + (3.0 * last_sample0)) * 0.25);
        last_sample7 = sample7;
        last_sample6 = sample6;
        last_sample5 = sample5;
        last_sample4 = sample4;
        last_sample3 = sample3;
        last_sample2 = sample2;
        last_sample1 = sample1;
        last_sample0 = sample0;
        dst -= 32;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

static void SDLCALL
SDL_Downsample_F32MSB_8c_x4(SDL_AudioCVT * cvt, SDL_AudioFormat format)
{
#if DEBUG_CONVERT
    fprintf(stderr, "Downsample (x4) AUDIO_F32MSB, 8 channels.\n");
#endif

    const int srcsize = cvt->len_cvt;
    const int dstsize = cvt->len_cvt / 4;
    float *dst = (float *) cvt->buf;
    const float *src = (float *) cvt->buf;
    const float *target = (const float *) (cvt->buf + dstsize);
    double last_sample0 = (double) SDL_SwapFloatBE(src[0]);
    double last_sample1 = (double) SDL_SwapFloatBE(src[1]);
    double last_sample2 = (double) SDL_SwapFloatBE(src[2]);
    double last_sample3 = (double) SDL_SwapFloatBE(src[3]);
    double last_sample4 = (double) SDL_SwapFloatBE(src[4]);
    double last_sample5 = (double) SDL_SwapFloatBE(src[5]);
    double last_sample6 = (double) SDL_SwapFloatBE(src[6]);
    double last_sample7 = (double) SDL_SwapFloatBE(src[7]);
    while (dst < target) {
        const double sample0 = (double) SDL_SwapFloatBE(src[0]);
        const double sample1 = (double) SDL_SwapFloatBE(src[1]);
        const double sample2 = (double) SDL_SwapFloatBE(src[2]);
        const double sample3 = (double) SDL_SwapFloatBE(src[3]);
        const double sample4 = (double) SDL_SwapFloatBE(src[4]);
        const double sample5 = (double) SDL_SwapFloatBE(src[5]);
        const double sample6 = (double) SDL_SwapFloatBE(src[6]);
        const double sample7 = (double) SDL_SwapFloatBE(src[7]);
        src += 32;
        dst[0] = (float) ((sample0 + last_sample0) * 0.5);
        dst[1] = (float) ((sample1 + last_sample1) * 0.5);
        dst[2] = (float) ((sample2 + last_sample2) * 0.5);
        dst[3] = (float) ((sample3 + last_sample3) * 0.5);
        dst[4] = (float) ((sample4 + last_sample4) * 0.5);
        dst[5] = (float) ((sample5 + last_sample5) * 0.5);
        dst[6] = (float) ((sample6 + last_sample6) * 0.5);
        dst[7] = (float) ((sample7 + last_sample7) * 0.5);
        last_sample0 = sample0;
        last_sample1 = sample1;
        last_sample2 = sample2;
        last_sample3 = sample3;
        last_sample4 = sample4;
        last_sample5 = sample5;
        last_sample6 = sample6;
        last_sample7 = sample7;
        dst += 8;
    }

    cvt->len_cvt = dstsize;
    if (cvt->filters[++cvt->filter_index]) {
        cvt->filters[cvt->filter_index] (cvt, format);
    }
}

#endif  /* !LESS_RESAMPLERS */
#endif  /* !NO_RESAMPLERS */


const SDL_AudioRateFilters sdl_audio_rate_filters[] =
{
#if !NO_RESAMPLERS
    { AUDIO_U8, 1, 0, 0, SDL_Downsample_U8_1c },
    { AUDIO_U8, 1, 1, 0, SDL_Upsample_U8_1c },
    { AUDIO_U8, 2, 0, 0, SDL_Downsample_U8_2c },
    { AUDIO_U8, 2, 1, 0, SDL_Upsample_U8_2c },
    { AUDIO_U8, 4, 0, 0, SDL_Downsample_U8_4c },
    { AUDIO_U8, 4, 1, 0, SDL_Upsample_U8_4c },
    { AUDIO_U8, 6, 0, 0, SDL_Downsample_U8_6c },
    { AUDIO_U8, 6, 1, 0, SDL_Upsample_U8_6c },
    { AUDIO_U8, 8, 0, 0, SDL_Downsample_U8_8c },
    { AUDIO_U8, 8, 1, 0, SDL_Upsample_U8_8c },
    { AUDIO_S8, 1, 0, 0, SDL_Downsample_S8_1c },
    { AUDIO_S8, 1, 1, 0, SDL_Upsample_S8_1c },
    { AUDIO_S8, 2, 0, 0, SDL_Downsample_S8_2c },
    { AUDIO_S8, 2, 1, 0, SDL_Upsample_S8_2c },
    { AUDIO_S8, 4, 0, 0, SDL_Downsample_S8_4c },
    { AUDIO_S8, 4, 1, 0, SDL_Upsample_S8_4c },
    { AUDIO_S8, 6, 0, 0, SDL_Downsample_S8_6c },
    { AUDIO_S8, 6, 1, 0, SDL_Upsample_S8_6c },
    { AUDIO_S8, 8, 0, 0, SDL_Downsample_S8_8c },
    { AUDIO_S8, 8, 1, 0, SDL_Upsample_S8_8c },
    { AUDIO_U16LSB, 1, 0, 0, SDL_Downsample_U16LSB_1c },
    { AUDIO_U16LSB, 1, 1, 0, SDL_Upsample_U16LSB_1c },
    { AUDIO_U16LSB, 2, 0, 0, SDL_Downsample_U16LSB_2c },
    { AUDIO_U16LSB, 2, 1, 0, SDL_Upsample_U16LSB_2c },
    { AUDIO_U16LSB, 4, 0, 0, SDL_Downsample_U16LSB_4c },
    { AUDIO_U16LSB, 4, 1, 0, SDL_Upsample_U16LSB_4c },
    { AUDIO_U16LSB, 6, 0, 0, SDL_Downsample_U16LSB_6c },
    { AUDIO_U16LSB, 6, 1, 0, SDL_Upsample_U16LSB_6c },
    { AUDIO_U16LSB, 8, 0, 0, SDL_Downsample_U16LSB_8c },
    { AUDIO_U16LSB, 8, 1, 0, SDL_Upsample_U16LSB_8c },
    { AUDIO_S16LSB, 1, 0, 0, SDL_Downsample_S16LSB_1c },
    { AUDIO_S16LSB, 1, 1, 0, SDL_Upsample_S16LSB_1c },
    { AUDIO_S16LSB, 2, 0, 0, SDL_Downsample_S16LSB_2c },
    { AUDIO_S16LSB, 2, 1, 0, SDL_Upsample_S16LSB_2c },
    { AUDIO_S16LSB, 4, 0, 0, SDL_Downsample_S16LSB_4c },
    { AUDIO_S16LSB, 4, 1, 0, SDL_Upsample_S16LSB_4c },
    { AUDIO_S16LSB, 6, 0, 0, SDL_Downsample_S16LSB_6c },
    { AUDIO_S16LSB, 6, 1, 0, SDL_Upsample_S16LSB_6c },
    { AUDIO_S16LSB, 8, 0, 0, SDL_Downsample_S16LSB_8c },
    { AUDIO_S16LSB, 8, 1, 0, SDL_Upsample_S16LSB_8c },
    { AUDIO_U16MSB, 1, 0, 0, SDL_Downsample_U16MSB_1c },
    { AUDIO_U16MSB, 1, 1, 0, SDL_Upsample_U16MSB_1c },
    { AUDIO_U16MSB, 2, 0, 0, SDL_Downsample_U16MSB_2c },
    { AUDIO_U16MSB, 2, 1, 0, SDL_Upsample_U16MSB_2c },
    { AUDIO_U16MSB, 4, 0, 0, SDL_Downsample_U16MSB_4c },
    { AUDIO_U16MSB, 4, 1, 0, SDL_Upsample_U16MSB_4c },
    { AUDIO_U16MSB, 6, 0, 0, SDL_Downsample_U16MSB_6c },
    { AUDIO_U16MSB, 6, 1, 0, SDL_Upsample_U16MSB_6c },
    { AUDIO_U16MSB, 8, 0, 0, SDL_Downsample_U16MSB_8c },
    { AUDIO_U16MSB, 8, 1, 0, SDL_Upsample_U16MSB_8c },
    { AUDIO_S16MSB, 1, 0, 0, SDL_Downsample_S16MSB_1c },
    { AUDIO_S16MSB, 1, 1, 0, SDL_Upsample_S16MSB_1c },
    { AUDIO_S16MSB, 2, 0, 0, SDL_Downsample_S16MSB_2c },
    { AUDIO_S16MSB, 2, 1, 0, SDL_Upsample_S16MSB_2c },
    { AUDIO_S16MSB, 4, 0, 0, SDL_Downsample_S16MSB_4c },
    { AUDIO_S16MSB, 4, 1, 0, SDL_Upsample_S16MSB_4c },
    { AUDIO_S16MSB, 6, 0, 0, SDL_Downsample_S16MSB_6c },
    { AUDIO_S16MSB, 6, 1, 0, SDL_Upsample_S16MSB_6c },
    { AUDIO_S16MSB, 8, 0, 0, SDL_Downsample_S16MSB_8c },
    { AUDIO_S16MSB, 8, 1, 0, SDL_Upsample_S16MSB_8c },
    { AUDIO_S32LSB, 1, 0, 0, SDL_Downsample_S32LSB_1c },
    { AUDIO_S32LSB, 1, 1, 0, SDL_Upsample_S32LSB_1c },
    { AUDIO_S32LSB, 2, 0, 0, SDL_Downsample_S32LSB_2c },
    { AUDIO_S32LSB, 2, 1, 0, SDL_Upsample_S32LSB_2c },
    { AUDIO_S32LSB, 4, 0, 0, SDL_Downsample_S32LSB_4c },
    { AUDIO_S32LSB, 4, 1, 0, SDL_Upsample_S32LSB_4c },
    { AUDIO_S32LSB, 6, 0, 0, SDL_Downsample_S32LSB_6c },
    { AUDIO_S32LSB, 6, 1, 0, SDL_Upsample_S32LSB_6c },
    { AUDIO_S32LSB, 8, 0, 0, SDL_Downsample_S32LSB_8c },
    { AUDIO_S32LSB, 8, 1, 0, SDL_Upsample_S32LSB_8c },
    { AUDIO_S32MSB, 1, 0, 0, SDL_Downsample_S32MSB_1c },
    { AUDIO_S32MSB, 1, 1, 0, SDL_Upsample_S32MSB_1c },
    { AUDIO_S32MSB, 2, 0, 0, SDL_Downsample_S32MSB_2c },
    { AUDIO_S32MSB, 2, 1, 0, SDL_Upsample_S32MSB_2c },
    { AUDIO_S32MSB, 4, 0, 0, SDL_Downsample_S32MSB_4c },
    { AUDIO_S32MSB, 4, 1, 0, SDL_Upsample_S32MSB_4c },
    { AUDIO_S32MSB, 6, 0, 0, SDL_Downsample_S32MSB_6c },
    { AUDIO_S32MSB, 6, 1, 0, SDL_Upsample_S32MSB_6c },
    { AUDIO_S32MSB, 8, 0, 0, SDL_Downsample_S32MSB_8c },
    { AUDIO_S32MSB, 8, 1, 0, SDL_Upsample_S32MSB_8c },
    { AUDIO_F32LSB, 1, 0, 0, SDL_Downsample_F32LSB_1c },
    { AUDIO_F32LSB, 1, 1, 0, SDL_Upsample_F32LSB_1c },
    { AUDIO_F32LSB, 2, 0, 0, SDL_Downsample_F32LSB_2c },
    { AUDIO_F32LSB, 2, 1, 0, SDL_Upsample_F32LSB_2c },
    { AUDIO_F32LSB, 4, 0, 0, SDL_Downsample_F32LSB_4c },
    { AUDIO_F32LSB, 4, 1, 0, SDL_Upsample_F32LSB_4c },
    { AUDIO_F32LSB, 6, 0, 0, SDL_Downsample_F32LSB_6c },
    { AUDIO_F32LSB, 6, 1, 0, SDL_Upsample_F32LSB_6c },
    { AUDIO_F32LSB, 8, 0, 0, SDL_Downsample_F32LSB_8c },
    { AUDIO_F32LSB, 8, 1, 0, SDL_Upsample_F32LSB_8c },
    { AUDIO_F32MSB, 1, 0, 0, SDL_Downsample_F32MSB_1c },
    { AUDIO_F32MSB, 1, 1, 0, SDL_Upsample_F32MSB_1c },
    { AUDIO_F32MSB, 2, 0, 0, SDL_Downsample_F32MSB_2c },
    { AUDIO_F32MSB, 2, 1, 0, SDL_Upsample_F32MSB_2c },
    { AUDIO_F32MSB, 4, 0, 0, SDL_Downsample_F32MSB_4c },
    { AUDIO_F32MSB, 4, 1, 0, SDL_Upsample_F32MSB_4c },
    { AUDIO_F32MSB, 6, 0, 0, SDL_Downsample_F32MSB_6c },
    { AUDIO_F32MSB, 6, 1, 0, SDL_Upsample_F32MSB_6c },
    { AUDIO_F32MSB, 8, 0, 0, SDL_Downsample_F32MSB_8c },
    { AUDIO_F32MSB, 8, 1, 0, SDL_Upsample_F32MSB_8c },
#if !LESS_RESAMPLERS
    { AUDIO_U8, 1, 0, 2, SDL_Downsample_U8_1c_x2 },
    { AUDIO_U8, 1, 1, 2, SDL_Upsample_U8_1c_x2 },
    { AUDIO_U8, 1, 0, 4, SDL_Downsample_U8_1c_x4 },
    { AUDIO_U8, 1, 1, 4, SDL_Upsample_U8_1c_x4 },
    { AUDIO_U8, 2, 0, 2, SDL_Downsample_U8_2c_x2 },
    { AUDIO_U8, 2, 1, 2, SDL_Upsample_U8_2c_x2 },
    { AUDIO_U8, 2, 0, 4, SDL_Downsample_U8_2c_x4 },
    { AUDIO_U8, 2, 1, 4, SDL_Upsample_U8_2c_x4 },
    { AUDIO_U8, 4, 0, 2, SDL_Downsample_U8_4c_x2 },
    { AUDIO_U8, 4, 1, 2, SDL_Upsample_U8_4c_x2 },
    { AUDIO_U8, 4, 0, 4, SDL_Downsample_U8_4c_x4 },
    { AUDIO_U8, 4, 1, 4, SDL_Upsample_U8_4c_x4 },
    { AUDIO_U8, 6, 0, 2, SDL_Downsample_U8_6c_x2 },
    { AUDIO_U8, 6, 1, 2, SDL_Upsample_U8_6c_x2 },
    { AUDIO_U8, 6, 0, 4, SDL_Downsample_U8_6c_x4 },
    { AUDIO_U8, 6, 1, 4, SDL_Upsample_U8_6c_x4 },
    { AUDIO_U8, 8, 0, 2, SDL_Downsample_U8_8c_x2 },
    { AUDIO_U8, 8, 1, 2, SDL_Upsample_U8_8c_x2 },
    { AUDIO_U8, 8, 0, 4, SDL_Downsample_U8_8c_x4 },
    { AUDIO_U8, 8, 1, 4, SDL_Upsample_U8_8c_x4 },
    { AUDIO_S8, 1, 0, 2, SDL_Downsample_S8_1c_x2 },
    { AUDIO_S8, 1, 1, 2, SDL_Upsample_S8_1c_x2 },
    { AUDIO_S8, 1, 0, 4, SDL_Downsample_S8_1c_x4 },
    { AUDIO_S8, 1, 1, 4, SDL_Upsample_S8_1c_x4 },
    { AUDIO_S8, 2, 0, 2, SDL_Downsample_S8_2c_x2 },
    { AUDIO_S8, 2, 1, 2, SDL_Upsample_S8_2c_x2 },
    { AUDIO_S8, 2, 0, 4, SDL_Downsample_S8_2c_x4 },
    { AUDIO_S8, 2, 1, 4, SDL_Upsample_S8_2c_x4 },
    { AUDIO_S8, 4, 0, 2, SDL_Downsample_S8_4c_x2 },
    { AUDIO_S8, 4, 1, 2, SDL_Upsample_S8_4c_x2 },
    { AUDIO_S8, 4, 0, 4, SDL_Downsample_S8_4c_x4 },
    { AUDIO_S8, 4, 1, 4, SDL_Upsample_S8_4c_x4 },
    { AUDIO_S8, 6, 0, 2, SDL_Downsample_S8_6c_x2 },
    { AUDIO_S8, 6, 1, 2, SDL_Upsample_S8_6c_x2 },
    { AUDIO_S8, 6, 0, 4, SDL_Downsample_S8_6c_x4 },
    { AUDIO_S8, 6, 1, 4, SDL_Upsample_S8_6c_x4 },
    { AUDIO_S8, 8, 0, 2, SDL_Downsample_S8_8c_x2 },
    { AUDIO_S8, 8, 1, 2, SDL_Upsample_S8_8c_x2 },
    { AUDIO_S8, 8, 0, 4, SDL_Downsample_S8_8c_x4 },
    { AUDIO_S8, 8, 1, 4, SDL_Upsample_S8_8c_x4 },
    { AUDIO_U16LSB, 1, 0, 2, SDL_Downsample_U16LSB_1c_x2 },
    { AUDIO_U16LSB, 1, 1, 2, SDL_Upsample_U16LSB_1c_x2 },
    { AUDIO_U16LSB, 1, 0, 4, SDL_Downsample_U16LSB_1c_x4 },
    { AUDIO_U16LSB, 1, 1, 4, SDL_Upsample_U16LSB_1c_x4 },
    { AUDIO_U16LSB, 2, 0, 2, SDL_Downsample_U16LSB_2c_x2 },
    { AUDIO_U16LSB, 2, 1, 2, SDL_Upsample_U16LSB_2c_x2 },
    { AUDIO_U16LSB, 2, 0, 4, SDL_Downsample_U16LSB_2c_x4 },
    { AUDIO_U16LSB, 2, 1, 4, SDL_Upsample_U16LSB_2c_x4 },
    { AUDIO_U16LSB, 4, 0, 2, SDL_Downsample_U16LSB_4c_x2 },
    { AUDIO_U16LSB, 4, 1, 2, SDL_Upsample_U16LSB_4c_x2 },
    { AUDIO_U16LSB, 4, 0, 4, SDL_Downsample_U16LSB_4c_x4 },
    { AUDIO_U16LSB, 4, 1, 4, SDL_Upsample_U16LSB_4c_x4 },
    { AUDIO_U16LSB, 6, 0, 2, SDL_Downsample_U16LSB_6c_x2 },
    { AUDIO_U16LSB, 6, 1, 2, SDL_Upsample_U16LSB_6c_x2 },
    { AUDIO_U16LSB, 6, 0, 4, SDL_Downsample_U16LSB_6c_x4 },
    { AUDIO_U16LSB, 6, 1, 4, SDL_Upsample_U16LSB_6c_x4 },
    { AUDIO_U16LSB, 8, 0, 2, SDL_Downsample_U16LSB_8c_x2 },
    { AUDIO_U16LSB, 8, 1, 2, SDL_Upsample_U16LSB_8c_x2 },
    { AUDIO_U16LSB, 8, 0, 4, SDL_Downsample_U16LSB_8c_x4 },
    { AUDIO_U16LSB, 8, 1, 4, SDL_Upsample_U16LSB_8c_x4 },
    { AUDIO_S16LSB, 1, 0, 2, SDL_Downsample_S16LSB_1c_x2 },
    { AUDIO_S16LSB, 1, 1, 2, SDL_Upsample_S16LSB_1c_x2 },
    { AUDIO_S16LSB, 1, 0, 4, SDL_Downsample_S16LSB_1c_x4 },
    { AUDIO_S16LSB, 1, 1, 4, SDL_Upsample_S16LSB_1c_x4 },
    { AUDIO_S16LSB, 2, 0, 2, SDL_Downsample_S16LSB_2c_x2 },
    { AUDIO_S16LSB, 2, 1, 2, SDL_Upsample_S16LSB_2c_x2 },
    { AUDIO_S16LSB, 2, 0, 4, SDL_Downsample_S16LSB_2c_x4 },
    { AUDIO_S16LSB, 2, 1, 4, SDL_Upsample_S16LSB_2c_x4 },
    { AUDIO_S16LSB, 4, 0, 2, SDL_Downsample_S16LSB_4c_x2 },
    { AUDIO_S16LSB, 4, 1, 2, SDL_Upsample_S16LSB_4c_x2 },
    { AUDIO_S16LSB, 4, 0, 4, SDL_Downsample_S16LSB_4c_x4 },
    { AUDIO_S16LSB, 4, 1, 4, SDL_Upsample_S16LSB_4c_x4 },
    { AUDIO_S16LSB, 6, 0, 2, SDL_Downsample_S16LSB_6c_x2 },
    { AUDIO_S16LSB, 6, 1, 2, SDL_Upsample_S16LSB_6c_x2 },
    { AUDIO_S16LSB, 6, 0, 4, SDL_Downsample_S16LSB_6c_x4 },
    { AUDIO_S16LSB, 6, 1, 4, SDL_Upsample_S16LSB_6c_x4 },
    { AUDIO_S16LSB, 8, 0, 2, SDL_Downsample_S16LSB_8c_x2 },
    { AUDIO_S16LSB, 8, 1, 2, SDL_Upsample_S16LSB_8c_x2 },
    { AUDIO_S16LSB, 8, 0, 4, SDL_Downsample_S16LSB_8c_x4 },
    { AUDIO_S16LSB, 8, 1, 4, SDL_Upsample_S16LSB_8c_x4 },
    { AUDIO_U16MSB, 1, 0, 2, SDL_Downsample_U16MSB_1c_x2 },
    { AUDIO_U16MSB, 1, 1, 2, SDL_Upsample_U16MSB_1c_x2 },
    { AUDIO_U16MSB, 1, 0, 4, SDL_Downsample_U16MSB_1c_x4 },
    { AUDIO_U16MSB, 1, 1, 4, SDL_Upsample_U16MSB_1c_x4 },
    { AUDIO_U16MSB, 2, 0, 2, SDL_Downsample_U16MSB_2c_x2 },
    { AUDIO_U16MSB, 2, 1, 2, SDL_Upsample_U16MSB_2c_x2 },
    { AUDIO_U16MSB, 2, 0, 4, SDL_Downsample_U16MSB_2c_x4 },
    { AUDIO_U16MSB, 2, 1, 4, SDL_Upsample_U16MSB_2c_x4 },
    { AUDIO_U16MSB, 4, 0, 2, SDL_Downsample_U16MSB_4c_x2 },
    { AUDIO_U16MSB, 4, 1, 2, SDL_Upsample_U16MSB_4c_x2 },
    { AUDIO_U16MSB, 4, 0, 4, SDL_Downsample_U16MSB_4c_x4 },
    { AUDIO_U16MSB, 4, 1, 4, SDL_Upsample_U16MSB_4c_x4 },
    { AUDIO_U16MSB, 6, 0, 2, SDL_Downsample_U16MSB_6c_x2 },
    { AUDIO_U16MSB, 6, 1, 2, SDL_Upsample_U16MSB_6c_x2 },
    { AUDIO_U16MSB, 6, 0, 4, SDL_Downsample_U16MSB_6c_x4 },
    { AUDIO_U16MSB, 6, 1, 4, SDL_Upsample_U16MSB_6c_x4 },
    { AUDIO_U16MSB, 8, 0, 2, SDL_Downsample_U16MSB_8c_x2 },
    { AUDIO_U16MSB, 8, 1, 2, SDL_Upsample_U16MSB_8c_x2 },
    { AUDIO_U16MSB, 8, 0, 4, SDL_Downsample_U16MSB_8c_x4 },
    { AUDIO_U16MSB, 8, 1, 4, SDL_Upsample_U16MSB_8c_x4 },
    { AUDIO_S16MSB, 1, 0, 2, SDL_Downsample_S16MSB_1c_x2 },
    { AUDIO_S16MSB, 1, 1, 2, SDL_Upsample_S16MSB_1c_x2 },
    { AUDIO_S16MSB, 1, 0, 4, SDL_Downsample_S16MSB_1c_x4 },
    { AUDIO_S16MSB, 1, 1, 4, SDL_Upsample_S16MSB_1c_x4 },
    { AUDIO_S16MSB, 2, 0, 2, SDL_Downsample_S16MSB_2c_x2 },
    { AUDIO_S16MSB, 2, 1, 2, SDL_Upsample_S16MSB_2c_x2 },
    { AUDIO_S16MSB, 2, 0, 4, SDL_Downsample_S16MSB_2c_x4 },
    { AUDIO_S16MSB, 2, 1, 4, SDL_Upsample_S16MSB_2c_x4 },
    { AUDIO_S16MSB, 4, 0, 2, SDL_Downsample_S16MSB_4c_x2 },
    { AUDIO_S16MSB, 4, 1, 2, SDL_Upsample_S16MSB_4c_x2 },
    { AUDIO_S16MSB, 4, 0, 4, SDL_Downsample_S16MSB_4c_x4 },
    { AUDIO_S16MSB, 4, 1, 4, SDL_Upsample_S16MSB_4c_x4 },
    { AUDIO_S16MSB, 6, 0, 2, SDL_Downsample_S16MSB_6c_x2 },
    { AUDIO_S16MSB, 6, 1, 2, SDL_Upsample_S16MSB_6c_x2 },
    { AUDIO_S16MSB, 6, 0, 4, SDL_Downsample_S16MSB_6c_x4 },
    { AUDIO_S16MSB, 6, 1, 4, SDL_Upsample_S16MSB_6c_x4 },
    { AUDIO_S16MSB, 8, 0, 2, SDL_Downsample_S16MSB_8c_x2 },
    { AUDIO_S16MSB, 8, 1, 2, SDL_Upsample_S16MSB_8c_x2 },
    { AUDIO_S16MSB, 8, 0, 4, SDL_Downsample_S16MSB_8c_x4 },
    { AUDIO_S16MSB, 8, 1, 4, SDL_Upsample_S16MSB_8c_x4 },
    { AUDIO_S32LSB, 1, 0, 2, SDL_Downsample_S32LSB_1c_x2 },
    { AUDIO_S32LSB, 1, 1, 2, SDL_Upsample_S32LSB_1c_x2 },
    { AUDIO_S32LSB, 1, 0, 4, SDL_Downsample_S32LSB_1c_x4 },
    { AUDIO_S32LSB, 1, 1, 4, SDL_Upsample_S32LSB_1c_x4 },
    { AUDIO_S32LSB, 2, 0, 2, SDL_Downsample_S32LSB_2c_x2 },
    { AUDIO_S32LSB, 2, 1, 2, SDL_Upsample_S32LSB_2c_x2 },
    { AUDIO_S32LSB, 2, 0, 4, SDL_Downsample_S32LSB_2c_x4 },
    { AUDIO_S32LSB, 2, 1, 4, SDL_Upsample_S32LSB_2c_x4 },
    { AUDIO_S32LSB, 4, 0, 2, SDL_Downsample_S32LSB_4c_x2 },
    { AUDIO_S32LSB, 4, 1, 2, SDL_Upsample_S32LSB_4c_x2 },
    { AUDIO_S32LSB, 4, 0, 4, SDL_Downsample_S32LSB_4c_x4 },
    { AUDIO_S32LSB, 4, 1, 4, SDL_Upsample_S32LSB_4c_x4 },
    { AUDIO_S32LSB, 6, 0, 2, SDL_Downsample_S32LSB_6c_x2 },
    { AUDIO_S32LSB, 6, 1, 2, SDL_Upsample_S32LSB_6c_x2 },
    { AUDIO_S32LSB, 6, 0, 4, SDL_Downsample_S32LSB_6c_x4 },
    { AUDIO_S32LSB, 6, 1, 4, SDL_Upsample_S32LSB_6c_x4 },
    { AUDIO_S32LSB, 8, 0, 2, SDL_Downsample_S32LSB_8c_x2 },
    { AUDIO_S32LSB, 8, 1, 2, SDL_Upsample_S32LSB_8c_x2 },
    { AUDIO_S32LSB, 8, 0, 4, SDL_Downsample_S32LSB_8c_x4 },
    { AUDIO_S32LSB, 8, 1, 4, SDL_Upsample_S32LSB_8c_x4 },
    { AUDIO_S32MSB, 1, 0, 2, SDL_Downsample_S32MSB_1c_x2 },
    { AUDIO_S32MSB, 1, 1, 2, SDL_Upsample_S32MSB_1c_x2 },
    { AUDIO_S32MSB, 1, 0, 4, SDL_Downsample_S32MSB_1c_x4 },
    { AUDIO_S32MSB, 1, 1, 4, SDL_Upsample_S32MSB_1c_x4 },
    { AUDIO_S32MSB, 2, 0, 2, SDL_Downsample_S32MSB_2c_x2 },
    { AUDIO_S32MSB, 2, 1, 2, SDL_Upsample_S32MSB_2c_x2 },
    { AUDIO_S32MSB, 2, 0, 4, SDL_Downsample_S32MSB_2c_x4 },
    { AUDIO_S32MSB, 2, 1, 4, SDL_Upsample_S32MSB_2c_x4 },
    { AUDIO_S32MSB, 4, 0, 2, SDL_Downsample_S32MSB_4c_x2 },
    { AUDIO_S32MSB, 4, 1, 2, SDL_Upsample_S32MSB_4c_x2 },
    { AUDIO_S32MSB, 4, 0, 4, SDL_Downsample_S32MSB_4c_x4 },
    { AUDIO_S32MSB, 4, 1, 4, SDL_Upsample_S32MSB_4c_x4 },
    { AUDIO_S32MSB, 6, 0, 2, SDL_Downsample_S32MSB_6c_x2 },
    { AUDIO_S32MSB, 6, 1, 2, SDL_Upsample_S32MSB_6c_x2 },
    { AUDIO_S32MSB, 6, 0, 4, SDL_Downsample_S32MSB_6c_x4 },
    { AUDIO_S32MSB, 6, 1, 4, SDL_Upsample_S32MSB_6c_x4 },
    { AUDIO_S32MSB, 8, 0, 2, SDL_Downsample_S32MSB_8c_x2 },
    { AUDIO_S32MSB, 8, 1, 2, SDL_Upsample_S32MSB_8c_x2 },
    { AUDIO_S32MSB, 8, 0, 4, SDL_Downsample_S32MSB_8c_x4 },
    { AUDIO_S32MSB, 8, 1, 4, SDL_Upsample_S32MSB_8c_x4 },
    { AUDIO_F32LSB, 1, 0, 2, SDL_Downsample_F32LSB_1c_x2 },
    { AUDIO_F32LSB, 1, 1, 2, SDL_Upsample_F32LSB_1c_x2 },
    { AUDIO_F32LSB, 1, 0, 4, SDL_Downsample_F32LSB_1c_x4 },
    { AUDIO_F32LSB, 1, 1, 4, SDL_Upsample_F32LSB_1c_x4 },
    { AUDIO_F32LSB, 2, 0, 2, SDL_Downsample_F32LSB_2c_x2 },
    { AUDIO_F32LSB, 2, 1, 2, SDL_Upsample_F32LSB_2c_x2 },
    { AUDIO_F32LSB, 2, 0, 4, SDL_Downsample_F32LSB_2c_x4 },
    { AUDIO_F32LSB, 2, 1, 4, SDL_Upsample_F32LSB_2c_x4 },
    { AUDIO_F32LSB, 4, 0, 2, SDL_Downsample_F32LSB_4c_x2 },
    { AUDIO_F32LSB, 4, 1, 2, SDL_Upsample_F32LSB_4c_x2 },
    { AUDIO_F32LSB, 4, 0, 4, SDL_Downsample_F32LSB_4c_x4 },
    { AUDIO_F32LSB, 4, 1, 4, SDL_Upsample_F32LSB_4c_x4 },
    { AUDIO_F32LSB, 6, 0, 2, SDL_Downsample_F32LSB_6c_x2 },
    { AUDIO_F32LSB, 6, 1, 2, SDL_Upsample_F32LSB_6c_x2 },
    { AUDIO_F32LSB, 6, 0, 4, SDL_Downsample_F32LSB_6c_x4 },
    { AUDIO_F32LSB, 6, 1, 4, SDL_Upsample_F32LSB_6c_x4 },
    { AUDIO_F32LSB, 8, 0, 2, SDL_Downsample_F32LSB_8c_x2 },
    { AUDIO_F32LSB, 8, 1, 2, SDL_Upsample_F32LSB_8c_x2 },
    { AUDIO_F32LSB, 8, 0, 4, SDL_Downsample_F32LSB_8c_x4 },
    { AUDIO_F32LSB, 8, 1, 4, SDL_Upsample_F32LSB_8c_x4 },
    { AUDIO_F32MSB, 1, 0, 2, SDL_Downsample_F32MSB_1c_x2 },
    { AUDIO_F32MSB, 1, 1, 2, SDL_Upsample_F32MSB_1c_x2 },
    { AUDIO_F32MSB, 1, 0, 4, SDL_Downsample_F32MSB_1c_x4 },
    { AUDIO_F32MSB, 1, 1, 4, SDL_Upsample_F32MSB_1c_x4 },
    { AUDIO_F32MSB, 2, 0, 2, SDL_Downsample_F32MSB_2c_x2 },
    { AUDIO_F32MSB, 2, 1, 2, SDL_Upsample_F32MSB_2c_x2 },
    { AUDIO_F32MSB, 2, 0, 4, SDL_Downsample_F32MSB_2c_x4 },
    { AUDIO_F32MSB, 2, 1, 4, SDL_Upsample_F32MSB_2c_x4 },
    { AUDIO_F32MSB, 4, 0, 2, SDL_Downsample_F32MSB_4c_x2 },
    { AUDIO_F32MSB, 4, 1, 2, SDL_Upsample_F32MSB_4c_x2 },
    { AUDIO_F32MSB, 4, 0, 4, SDL_Downsample_F32MSB_4c_x4 },
    { AUDIO_F32MSB, 4, 1, 4, SDL_Upsample_F32MSB_4c_x4 },
    { AUDIO_F32MSB, 6, 0, 2, SDL_Downsample_F32MSB_6c_x2 },
    { AUDIO_F32MSB, 6, 1, 2, SDL_Upsample_F32MSB_6c_x2 },
    { AUDIO_F32MSB, 6, 0, 4, SDL_Downsample_F32MSB_6c_x4 },
    { AUDIO_F32MSB, 6, 1, 4, SDL_Upsample_F32MSB_6c_x4 },
    { AUDIO_F32MSB, 8, 0, 2, SDL_Downsample_F32MSB_8c_x2 },
    { AUDIO_F32MSB, 8, 1, 2, SDL_Upsample_F32MSB_8c_x2 },
    { AUDIO_F32MSB, 8, 0, 4, SDL_Downsample_F32MSB_8c_x4 },
    { AUDIO_F32MSB, 8, 1, 4, SDL_Upsample_F32MSB_8c_x4 },
#endif  /* !LESS_RESAMPLERS */
#endif  /* !NO_RESAMPLERS */
    { 0, 0, 0, 0, NULL }
};

/* 390 converters generated. */

/* *INDENT-ON* */

/* vi: set ts=4 sw=4 expandtab: */