sdl-ios-xcode: src/audio/SDL_audiocvt.c annotate

annotate src/audio/SDL_audiocvt.c @ 1228:f4a3a4129d04

From Mike Frysinger and/or Gentoo: - libsdl-SDL_stretch-PIC.patch ignoring the general fact of how SDL_stretch relies on executing dynamic code, the inline asm should let gcc handle the a details for getting the actual address for _copy_row as it will do the right thing test case: http://dev.gentoo.org/~vapier/libsdl/sdl-stretch.tar.bz2

author	Ryan C. Gordon <icculus@icculus.org>
date	Thu, 05 Jan 2006 07:20:12 +0000
parents	4095d9ca23f2
children	c9b51268668f

rev	line source
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1 /*
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	2 SDL - Simple DirectMedia Layer
769 b8d311d90021 Updated copyright information for 2004 (Happy New Year!) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	3 Copyright (C) 1997-2004 Sam Lantinga
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	4
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	5 This library is free software; you can redistribute it and/or
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	6 modify it under the terms of the GNU Library General Public
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	7 License as published by the Free Software Foundation; either
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	8 version 2 of the License, or (at your option) any later version.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	9
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	10 This library is distributed in the hope that it will be useful,
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	13 Library General Public License for more details.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	14
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	15 You should have received a copy of the GNU Library General Public
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	16 License along with this library; if not, write to the Free
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	18
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	19 Sam Lantinga
252 e8157fcb3114 Updated the source with the correct e-mail address Sam Lantinga <slouken@libsdl.org> parents: 0 diff changeset	20 slouken@libsdl.org
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	21 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	22
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	23 #ifdef SAVE_RCSID
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	24 static char rcsid =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	25 "@(#) $Id$";
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	26 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	27
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	28 /* Functions for audio drivers to perform runtime conversion of audio format */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	29
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	30 #include <stdio.h>
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	31
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	32 #include "SDL_error.h"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	33 #include "SDL_audio.h"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	34
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	35
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	36 /* Effectively mix right and left channels into a single channel */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	37 void SDL_ConvertMono(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	38 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	39 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	40 Sint32 sample;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	41
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	42 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	43 fprintf(stderr, "Converting to mono\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	44 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	45 switch (format&0x8018) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	46
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	47 case AUDIO_U8: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	48 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	49
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	50 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	51 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	52 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	53 sample = src[0] + src[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	54 if ( sample > 255 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	55 *dst = 255;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	56 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	57 *dst = sample;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	58 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	59 src += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	60 dst += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	61 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	62 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	63 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	64
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	65 case AUDIO_S8: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	66 Sint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	67
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	68 src = (Sint8 *)cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	69 dst = (Sint8 *)cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	70 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	71 sample = src[0] + src[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	72 if ( sample > 127 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	73 *dst = 127;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	74 } else
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	75 if ( sample < -128 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	76 *dst = -128;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	77 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	78 *dst = sample;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	79 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	80 src += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	81 dst += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	82 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	83 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	84 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	85
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	86 case AUDIO_U16: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	87 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	88
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	89 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	90 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	91 if ( (format & 0x1000) == 0x1000 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	92 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	93 sample = (Uint16)((src[0]<<8)\|src[1])+
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	94 (Uint16)((src[2]<<8)\|src[3]);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	95 if ( sample > 65535 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	96 dst[0] = 0xFF;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	97 dst[1] = 0xFF;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	98 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	99 dst[1] = (sample&0xFF);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	100 sample >>= 8;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	101 dst[0] = (sample&0xFF);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	102 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	103 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	104 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	105 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	106 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	107 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	108 sample = (Uint16)((src[1]<<8)\|src[0])+
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	109 (Uint16)((src[3]<<8)\|src[2]);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	110 if ( sample > 65535 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	111 dst[0] = 0xFF;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	112 dst[1] = 0xFF;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	113 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	114 dst[0] = (sample&0xFF);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	115 sample >>= 8;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	116 dst[1] = (sample&0xFF);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	117 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	118 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	119 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	120 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	121 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	122 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	123 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	124
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	125 case AUDIO_S16: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	126 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	127
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	128 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	129 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	130 if ( (format & 0x1000) == 0x1000 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	131 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	132 sample = (Sint16)((src[0]<<8)\|src[1])+
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	133 (Sint16)((src[2]<<8)\|src[3]);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	134 if ( sample > 32767 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	135 dst[0] = 0x7F;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	136 dst[1] = 0xFF;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	137 } else
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	138 if ( sample < -32768 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	139 dst[0] = 0x80;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	140 dst[1] = 0x00;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	141 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	142 dst[1] = (sample&0xFF);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	143 sample >>= 8;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	144 dst[0] = (sample&0xFF);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	145 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	146 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	147 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	148 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	149 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	150 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	151 sample = (Sint16)((src[1]<<8)\|src[0])+
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	152 (Sint16)((src[3]<<8)\|src[2]);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	153 if ( sample > 32767 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	154 dst[1] = 0x7F;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	155 dst[0] = 0xFF;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	156 } else
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	157 if ( sample < -32768 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	158 dst[1] = 0x80;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	159 dst[0] = 0x00;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	160 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	161 dst[0] = (sample&0xFF);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	162 sample >>= 8;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	163 dst[1] = (sample&0xFF);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	164 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	165 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	166 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	167 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	168 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	169 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	170 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	171 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	172 cvt->len_cvt /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	173 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	174 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	175 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	176 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	177
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	178 /* Discard top 4 channels */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	179 void SDL_ConvertStrip(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	180 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	181 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	182 Sint32 lsample, rsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	183
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	184 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	185 fprintf(stderr, "Converting down to stereo\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	186 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	187 switch (format&0x8018) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	188
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	189 case AUDIO_U8: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	190 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	191
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	192 src = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	193 dst = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	194 for ( i=cvt->len_cvt/6; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	195 lsample = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	196 rsample = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	197 dst[0] = lsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	198 dst[1] = rsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	199 src += 6;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	200 dst += 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	201 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	202 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	203 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	204
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	205 case AUDIO_S8: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	206 Sint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	207
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	208 src = (Sint8 *)cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	209 dst = (Sint8 *)cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	210 for ( i=cvt->len_cvt/6; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	211 lsample = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	212 rsample = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	213 dst[0] = lsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	214 dst[1] = rsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	215 src += 6;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	216 dst += 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	217 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	218 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	219 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	220
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	221 case AUDIO_U16: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	222 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	223
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	224 src = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	225 dst = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	226 if ( (format & 0x1000) == 0x1000 ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	227 for ( i=cvt->len_cvt/12; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	228 lsample = (Uint16)((src[0]<<8)\|src[1]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	229 rsample = (Uint16)((src[2]<<8)\|src[3]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	230 dst[1] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	231 lsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	232 dst[0] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	233 dst[3] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	234 rsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	235 dst[2] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	236 src += 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	237 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	238 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	239 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	240 for ( i=cvt->len_cvt/12; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	241 lsample = (Uint16)((src[1]<<8)\|src[0]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	242 rsample = (Uint16)((src[3]<<8)\|src[2]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	243 dst[0] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	244 lsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	245 dst[1] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	246 dst[2] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	247 rsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	248 dst[3] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	249 src += 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	250 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	251 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	252 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	253 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	254 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	255
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	256 case AUDIO_S16: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	257 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	258
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	259 src = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	260 dst = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	261 if ( (format & 0x1000) == 0x1000 ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	262 for ( i=cvt->len_cvt/12; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	263 lsample = (Sint16)((src[0]<<8)\|src[1]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	264 rsample = (Sint16)((src[2]<<8)\|src[3]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	265 dst[1] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	266 lsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	267 dst[0] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	268 dst[3] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	269 rsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	270 dst[2] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	271 src += 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	272 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	273 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	274 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	275 for ( i=cvt->len_cvt/12; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	276 lsample = (Sint16)((src[1]<<8)\|src[0]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	277 rsample = (Sint16)((src[3]<<8)\|src[2]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	278 dst[0] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	279 lsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	280 dst[1] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	281 dst[2] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	282 rsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	283 dst[3] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	284 src += 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	285 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	286 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	287 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	288 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	289 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	290 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	291 cvt->len_cvt /= 3;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	292 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	293 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	294 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	295 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	296
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	297
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	298 /* Discard top 2 channels of 6 */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	299 void SDL_ConvertStrip_2(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	300 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	301 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	302 Sint32 lsample, rsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	303
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	304 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	305 fprintf(stderr, "Converting 6 down to quad\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	306 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	307 switch (format&0x8018) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	308
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	309 case AUDIO_U8: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	310 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	311
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	312 src = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	313 dst = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	314 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	315 lsample = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	316 rsample = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	317 dst[0] = lsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	318 dst[1] = rsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	319 src += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	320 dst += 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	321 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	322 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	323 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	324
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	325 case AUDIO_S8: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	326 Sint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	327
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	328 src = (Sint8 *)cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	329 dst = (Sint8 *)cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	330 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	331 lsample = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	332 rsample = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	333 dst[0] = lsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	334 dst[1] = rsample;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	335 src += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	336 dst += 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	337 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	338 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	339 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	340
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	341 case AUDIO_U16: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	342 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	343
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	344 src = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	345 dst = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	346 if ( (format & 0x1000) == 0x1000 ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	347 for ( i=cvt->len_cvt/8; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	348 lsample = (Uint16)((src[0]<<8)\|src[1]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	349 rsample = (Uint16)((src[2]<<8)\|src[3]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	350 dst[1] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	351 lsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	352 dst[0] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	353 dst[3] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	354 rsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	355 dst[2] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	356 src += 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	357 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	358 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	359 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	360 for ( i=cvt->len_cvt/8; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	361 lsample = (Uint16)((src[1]<<8)\|src[0]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	362 rsample = (Uint16)((src[3]<<8)\|src[2]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	363 dst[0] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	364 lsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	365 dst[1] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	366 dst[2] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	367 rsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	368 dst[3] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	369 src += 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	370 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	371 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	372 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	373 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	374 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	375
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	376 case AUDIO_S16: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	377 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	378
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	379 src = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	380 dst = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	381 if ( (format & 0x1000) == 0x1000 ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	382 for ( i=cvt->len_cvt/8; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	383 lsample = (Sint16)((src[0]<<8)\|src[1]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	384 rsample = (Sint16)((src[2]<<8)\|src[3]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	385 dst[1] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	386 lsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	387 dst[0] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	388 dst[3] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	389 rsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	390 dst[2] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	391 src += 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	392 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	393 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	394 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	395 for ( i=cvt->len_cvt/8; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	396 lsample = (Sint16)((src[1]<<8)\|src[0]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	397 rsample = (Sint16)((src[3]<<8)\|src[2]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	398 dst[0] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	399 lsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	400 dst[1] = (lsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	401 dst[2] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	402 rsample >>= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	403 dst[3] = (rsample&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	404 src += 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	405 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	406 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	407 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	408 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	409 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	410 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	411 cvt->len_cvt /= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	412 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	413 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	414 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	415 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	416
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	417 /* Duplicate a mono channel to both stereo channels */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	418 void SDL_ConvertStereo(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	419 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	420 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	421
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	422 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	423 fprintf(stderr, "Converting to stereo\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	424 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	425 if ( (format & 0xFF) == 16 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	426 Uint16 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	427
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	428 src = (Uint16 *)(cvt->buf+cvt->len_cvt);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	429 dst = (Uint16 )(cvt->buf+cvt->len_cvt2);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	430 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	431 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	432 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	433 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	434 dst[1] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	435 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	436 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	437 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	438
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	439 src = cvt->buf+cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	440 dst = cvt->buf+cvt->len_cvt*2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	441 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	442 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	443 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	444 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	445 dst[1] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	446 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	447 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	448 cvt->len_cvt *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	449 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	450 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	451 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	452 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	453
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	454
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	455 /* Duplicate a stereo channel to a pseudo-5.1 stream */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	456 void SDL_ConvertSurround(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	457 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	458 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	459
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	460 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	461 fprintf(stderr, "Converting stereo to surround\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	462 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	463 switch (format&0x8018) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	464
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	465 case AUDIO_U8: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	466 Uint8 src, dst, lf, rf, ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	467
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	468 src = (Uint8 *)(cvt->buf+cvt->len_cvt);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	469 dst = (Uint8 )(cvt->buf+cvt->len_cvt3);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	470 for ( i=cvt->len_cvt; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	471 dst -= 6;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	472 src -= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	473 lf = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	474 rf = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	475 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	476 dst[0] = lf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	477 dst[1] = rf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	478 dst[2] = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	479 dst[3] = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	480 dst[4] = ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	481 dst[5] = ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	482 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	483 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	484 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	485
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	486 case AUDIO_S8: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	487 Sint8 src, dst, lf, rf, ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	488
1011 4095d9ca23f2 * empty log message * Sam Lantinga <slouken@libsdl.org> parents: 942 diff changeset	489 src = (Sint8 *)cvt->buf+cvt->len_cvt;
4095d9ca23f2 * empty log message * Sam Lantinga <slouken@libsdl.org> parents: 942 diff changeset	490 dst = (Sint8 )cvt->buf+cvt->len_cvt3;
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	491 for ( i=cvt->len_cvt; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	492 dst -= 6;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	493 src -= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	494 lf = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	495 rf = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	496 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	497 dst[0] = lf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	498 dst[1] = rf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	499 dst[2] = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	500 dst[3] = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	501 dst[4] = ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	502 dst[5] = ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	503 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	504 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	505 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	506
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	507 case AUDIO_U16: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	508 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	509 Uint16 lf, rf, ce, lr, rr;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	510
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	511 src = cvt->buf+cvt->len_cvt;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	512 dst = cvt->buf+cvt->len_cvt*3;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	513
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	514 if ( (format & 0x1000) == 0x1000 ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	515 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	516 dst -= 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	517 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	518 lf = (Uint16)((src[0]<<8)\|src[1]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	519 rf = (Uint16)((src[2]<<8)\|src[3]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	520 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	521 rr = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	522 lr = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	523 dst[1] = (lf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	524 dst[0] = ((lf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	525 dst[3] = (rf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	526 dst[2] = ((rf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	527
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	528 dst[1+4] = (lr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	529 dst[0+4] = ((lr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	530 dst[3+4] = (rr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	531 dst[2+4] = ((rr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	532
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	533 dst[1+8] = (ce&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	534 dst[0+8] = ((ce>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	535 dst[3+8] = (ce&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	536 dst[2+8] = ((ce>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	537 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	538 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	539 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	540 dst -= 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	541 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	542 lf = (Uint16)((src[1]<<8)\|src[0]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	543 rf = (Uint16)((src[3]<<8)\|src[2]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	544 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	545 rr = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	546 lr = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	547 dst[0] = (lf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	548 dst[1] = ((lf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	549 dst[2] = (rf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	550 dst[3] = ((rf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	551
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	552 dst[0+4] = (lr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	553 dst[1+4] = ((lr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	554 dst[2+4] = (rr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	555 dst[3+4] = ((rr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	556
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	557 dst[0+8] = (ce&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	558 dst[1+8] = ((ce>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	559 dst[2+8] = (ce&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	560 dst[3+8] = ((ce>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	561 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	562 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	563 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	564 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	565
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	566 case AUDIO_S16: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	567 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	568 Sint16 lf, rf, ce, lr, rr;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	569
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	570 src = cvt->buf+cvt->len_cvt;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	571 dst = cvt->buf+cvt->len_cvt*3;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	572
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	573 if ( (format & 0x1000) == 0x1000 ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	574 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	575 dst -= 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	576 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	577 lf = (Sint16)((src[0]<<8)\|src[1]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	578 rf = (Sint16)((src[2]<<8)\|src[3]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	579 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	580 rr = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	581 lr = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	582 dst[1] = (lf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	583 dst[0] = ((lf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	584 dst[3] = (rf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	585 dst[2] = ((rf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	586
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	587 dst[1+4] = (lr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	588 dst[0+4] = ((lr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	589 dst[3+4] = (rr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	590 dst[2+4] = ((rr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	591
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	592 dst[1+8] = (ce&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	593 dst[0+8] = ((ce>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	594 dst[3+8] = (ce&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	595 dst[2+8] = ((ce>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	596 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	597 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	598 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	599 dst -= 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	600 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	601 lf = (Sint16)((src[1]<<8)\|src[0]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	602 rf = (Sint16)((src[3]<<8)\|src[2]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	603 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	604 rr = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	605 lr = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	606 dst[0] = (lf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	607 dst[1] = ((lf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	608 dst[2] = (rf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	609 dst[3] = ((rf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	610
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	611 dst[0+4] = (lr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	612 dst[1+4] = ((lr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	613 dst[2+4] = (rr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	614 dst[3+4] = ((rr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	615
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	616 dst[0+8] = (ce&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	617 dst[1+8] = ((ce>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	618 dst[2+8] = (ce&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	619 dst[3+8] = ((ce>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	620 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	621 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	622 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	623 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	624 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	625 cvt->len_cvt *= 3;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	626 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	627 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	628 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	629 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	630
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	631
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	632 /* Duplicate a stereo channel to a pseudo-4.0 stream */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	633 void SDL_ConvertSurround_4(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	634 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	635 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	636
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	637 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	638 fprintf(stderr, "Converting stereo to quad\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	639 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	640 switch (format&0x8018) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	641
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	642 case AUDIO_U8: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	643 Uint8 src, dst, lf, rf, ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	644
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	645 src = (Uint8 *)(cvt->buf+cvt->len_cvt);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	646 dst = (Uint8 )(cvt->buf+cvt->len_cvt2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	647 for ( i=cvt->len_cvt; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	648 dst -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	649 src -= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	650 lf = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	651 rf = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	652 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	653 dst[0] = lf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	654 dst[1] = rf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	655 dst[2] = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	656 dst[3] = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	657 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	658 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	659 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	660
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	661 case AUDIO_S8: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	662 Sint8 src, dst, lf, rf, ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	663
1011 4095d9ca23f2 * empty log message * Sam Lantinga <slouken@libsdl.org> parents: 942 diff changeset	664 src = (Sint8 *)cvt->buf+cvt->len_cvt;
4095d9ca23f2 * empty log message * Sam Lantinga <slouken@libsdl.org> parents: 942 diff changeset	665 dst = (Sint8 )cvt->buf+cvt->len_cvt2;
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	666 for ( i=cvt->len_cvt; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	667 dst -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	668 src -= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	669 lf = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	670 rf = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	671 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	672 dst[0] = lf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	673 dst[1] = rf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	674 dst[2] = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	675 dst[3] = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	676 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	677 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	678 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	679
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	680 case AUDIO_U16: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	681 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	682 Uint16 lf, rf, ce, lr, rr;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	683
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	684 src = cvt->buf+cvt->len_cvt;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	685 dst = cvt->buf+cvt->len_cvt*2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	686
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	687 if ( (format & 0x1000) == 0x1000 ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	688 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	689 dst -= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	690 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	691 lf = (Uint16)((src[0]<<8)\|src[1]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	692 rf = (Uint16)((src[2]<<8)\|src[3]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	693 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	694 rr = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	695 lr = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	696 dst[1] = (lf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	697 dst[0] = ((lf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	698 dst[3] = (rf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	699 dst[2] = ((rf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	700
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	701 dst[1+4] = (lr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	702 dst[0+4] = ((lr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	703 dst[3+4] = (rr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	704 dst[2+4] = ((rr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	705 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	706 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	707 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	708 dst -= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	709 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	710 lf = (Uint16)((src[1]<<8)\|src[0]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	711 rf = (Uint16)((src[3]<<8)\|src[2]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	712 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	713 rr = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	714 lr = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	715 dst[0] = (lf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	716 dst[1] = ((lf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	717 dst[2] = (rf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	718 dst[3] = ((rf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	719
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	720 dst[0+4] = (lr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	721 dst[1+4] = ((lr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	722 dst[2+4] = (rr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	723 dst[3+4] = ((rr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	724 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	725 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	726 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	727 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	728
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	729 case AUDIO_S16: {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	730 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	731 Sint16 lf, rf, ce, lr, rr;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	732
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	733 src = cvt->buf+cvt->len_cvt;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	734 dst = cvt->buf+cvt->len_cvt*2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	735
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	736 if ( (format & 0x1000) == 0x1000 ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	737 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	738 dst -= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	739 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	740 lf = (Sint16)((src[0]<<8)\|src[1]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	741 rf = (Sint16)((src[2]<<8)\|src[3]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	742 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	743 rr = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	744 lr = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	745 dst[1] = (lf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	746 dst[0] = ((lf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	747 dst[3] = (rf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	748 dst[2] = ((rf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	749
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	750 dst[1+4] = (lr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	751 dst[0+4] = ((lr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	752 dst[3+4] = (rr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	753 dst[2+4] = ((rr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	754 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	755 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	756 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	757 dst -= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	758 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	759 lf = (Sint16)((src[1]<<8)\|src[0]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	760 rf = (Sint16)((src[3]<<8)\|src[2]);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	761 ce = (lf/2) + (rf/2);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	762 rr = lf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	763 lr = rf - ce;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	764 dst[0] = (lf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	765 dst[1] = ((lf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	766 dst[2] = (rf&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	767 dst[3] = ((rf>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	768
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	769 dst[0+4] = (lr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	770 dst[1+4] = ((lr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	771 dst[2+4] = (rr&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	772 dst[3+4] = ((rr>>8)&0xFF);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	773 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	774 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	775 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	776 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	777 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	778 cvt->len_cvt *= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	779 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	780 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	781 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	782 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	783
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	784
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	785 /* Convert 8-bit to 16-bit - LSB */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	786 void SDL_Convert16LSB(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	787 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	788 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	789 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	790
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	791 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	792 fprintf(stderr, "Converting to 16-bit LSB\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	793 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	794 src = cvt->buf+cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	795 dst = cvt->buf+cvt->len_cvt*2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	796 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	797 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	798 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	799 dst[1] = *src;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	800 dst[0] = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	801 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	802 format = ((format & ~0x0008) \| AUDIO_U16LSB);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	803 cvt->len_cvt *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	804 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	805 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	806 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	807 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	808 /* Convert 8-bit to 16-bit - MSB */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	809 void SDL_Convert16MSB(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	810 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	811 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	812 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	813
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	814 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	815 fprintf(stderr, "Converting to 16-bit MSB\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	816 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	817 src = cvt->buf+cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	818 dst = cvt->buf+cvt->len_cvt*2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	819 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	820 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	821 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	822 dst[0] = *src;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	823 dst[1] = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	824 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	825 format = ((format & ~0x0008) \| AUDIO_U16MSB);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	826 cvt->len_cvt *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	827 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	828 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	829 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	830 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	831
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	832 /* Convert 16-bit to 8-bit */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	833 void SDL_Convert8(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	834 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	835 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	836 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	837
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	838 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	839 fprintf(stderr, "Converting to 8-bit\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	840 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	841 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	842 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	843 if ( (format & 0x1000) != 0x1000 ) { /* Little endian */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	844 ++src;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	845 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	846 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	847 dst = src;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	848 src += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	849 dst += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	850 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	851 format = ((format & ~0x9010) \| AUDIO_U8);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	852 cvt->len_cvt /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	853 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	854 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	855 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	856 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	857
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	858 /* Toggle signed/unsigned */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	859 void SDL_ConvertSign(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	860 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	861 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	862 Uint8 *data;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	863
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	864 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	865 fprintf(stderr, "Converting audio signedness\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	866 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	867 data = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	868 if ( (format & 0xFF) == 16 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	869 if ( (format & 0x1000) != 0x1000 ) { /* Little endian */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	870 ++data;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	871 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	872 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	873 *data ^= 0x80;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	874 data += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	875 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	876 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	877 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	878 *data++ ^= 0x80;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	879 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	880 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	881 format = (format ^ 0x8000);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	882 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	883 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	884 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	885 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	886
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	887 /* Toggle endianness */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	888 void SDL_ConvertEndian(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	889 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	890 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	891 Uint8 *data, tmp;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	892
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	893 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	894 fprintf(stderr, "Converting audio endianness\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	895 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	896 data = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	897 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	898 tmp = data[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	899 data[0] = data[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	900 data[1] = tmp;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	901 data += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	902 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	903 format = (format ^ 0x1000);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	904 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	905 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	906 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	907 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	908
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	909 /* Convert rate up by multiple of 2 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	910 void SDL_RateMUL2(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	911 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	912 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	913 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	914
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	915 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	916 fprintf(stderr, "Converting audio rate * 2\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	917 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	918 src = cvt->buf+cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	919 dst = cvt->buf+cvt->len_cvt*2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	920 switch (format & 0xFF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	921 case 8:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	922 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	923 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	924 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	925 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	926 dst[1] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	927 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	928 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	929 case 16:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	930 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	931 src -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	932 dst -= 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	933 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	934 dst[1] = src[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	935 dst[2] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	936 dst[3] = src[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	937 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	938 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	939 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	940 cvt->len_cvt *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	941 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	942 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	943 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	944 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	945
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	946
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	947 /* Convert rate up by multiple of 2, for stereo */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	948 void SDL_RateMUL2_c2(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	949 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	950 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	951 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	952
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	953 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	954 fprintf(stderr, "Converting audio rate * 2\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	955 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	956 src = cvt->buf+cvt->len_cvt;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	957 dst = cvt->buf+cvt->len_cvt*2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	958 switch (format & 0xFF) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	959 case 8:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	960 for ( i=cvt->len_cvt/2; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	961 src -= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	962 dst -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	963 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	964 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	965 dst[2] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	966 dst[3] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	967 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	968 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	969 case 16:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	970 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	971 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	972 dst -= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	973 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	974 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	975 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	976 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	977 dst[4] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	978 dst[5] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	979 dst[6] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	980 dst[7] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	981 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	982 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	983 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	984 cvt->len_cvt *= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	985 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	986 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	987 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	988 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	989
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	990 /* Convert rate up by multiple of 2, for quad */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	991 void SDL_RateMUL2_c4(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	992 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	993 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	994 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	995
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	996 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	997 fprintf(stderr, "Converting audio rate * 2\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	998 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	999 src = cvt->buf+cvt->len_cvt;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1000 dst = cvt->buf+cvt->len_cvt*2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1001 switch (format & 0xFF) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1002 case 8:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1003 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1004 src -= 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1005 dst -= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1006 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1007 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1008 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1009 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1010 dst[4] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1011 dst[5] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1012 dst[6] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1013 dst[7] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1014 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1015 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1016 case 16:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1017 for ( i=cvt->len_cvt/8; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1018 src -= 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1019 dst -= 16;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1020 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1021 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1022 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1023 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1024 dst[4] = src[4];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1025 dst[5] = src[5];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1026 dst[6] = src[6];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1027 dst[7] = src[7];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1028 dst[8] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1029 dst[9] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1030 dst[10] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1031 dst[11] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1032 dst[12] = src[4];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1033 dst[13] = src[5];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1034 dst[14] = src[6];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1035 dst[15] = src[7];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1036 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1037 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1038 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1039 cvt->len_cvt *= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1040 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1041 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1042 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1043 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1044
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1045
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1046 /* Convert rate up by multiple of 2, for 5.1 */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1047 void SDL_RateMUL2_c6(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1048 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1049 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1050 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1051
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1052 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1053 fprintf(stderr, "Converting audio rate * 2\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1054 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1055 src = cvt->buf+cvt->len_cvt;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1056 dst = cvt->buf+cvt->len_cvt*2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1057 switch (format & 0xFF) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1058 case 8:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1059 for ( i=cvt->len_cvt/6; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1060 src -= 6;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1061 dst -= 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1062 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1063 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1064 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1065 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1066 dst[4] = src[4];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1067 dst[5] = src[5];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1068 dst[6] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1069 dst[7] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1070 dst[8] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1071 dst[9] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1072 dst[10] = src[4];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1073 dst[11] = src[5];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1074 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1075 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1076 case 16:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1077 for ( i=cvt->len_cvt/12; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1078 src -= 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1079 dst -= 24;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1080 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1081 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1082 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1083 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1084 dst[4] = src[4];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1085 dst[5] = src[5];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1086 dst[6] = src[6];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1087 dst[7] = src[7];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1088 dst[8] = src[8];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1089 dst[9] = src[9];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1090 dst[10] = src[10];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1091 dst[11] = src[11];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1092 dst[12] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1093 dst[13] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1094 dst[14] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1095 dst[15] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1096 dst[16] = src[4];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1097 dst[17] = src[5];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1098 dst[18] = src[6];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1099 dst[19] = src[7];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1100 dst[20] = src[8];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1101 dst[21] = src[9];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1102 dst[22] = src[10];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1103 dst[23] = src[11];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1104 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1105 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1106 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1107 cvt->len_cvt *= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1108 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1109 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1110 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1111 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1112
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1113 /* Convert rate down by multiple of 2 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1114 void SDL_RateDIV2(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1115 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1116 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1117 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1118
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1119 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1120 fprintf(stderr, "Converting audio rate / 2\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1121 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1122 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1123 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1124 switch (format & 0xFF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1125 case 8:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1126 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1127 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1128 src += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1129 dst += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1130 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1131 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1132 case 16:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1133 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1134 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1135 dst[1] = src[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1136 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1137 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1138 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1139 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1140 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1141 cvt->len_cvt /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1142 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1143 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1144 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1145 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1146
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1147
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1148 /* Convert rate down by multiple of 2, for stereo */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1149 void SDL_RateDIV2_c2(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1150 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1151 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1152 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1153
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1154 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1155 fprintf(stderr, "Converting audio rate / 2\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1156 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1157 src = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1158 dst = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1159 switch (format & 0xFF) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1160 case 8:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1161 for ( i=cvt->len_cvt/4; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1162 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1163 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1164 src += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1165 dst += 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1166 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1167 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1168 case 16:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1169 for ( i=cvt->len_cvt/8; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1170 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1171 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1172 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1173 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1174 src += 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1175 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1176 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1177 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1178 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1179 cvt->len_cvt /= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1180 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1181 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1182 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1183 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1184
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1185
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1186 /* Convert rate down by multiple of 2, for quad */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1187 void SDL_RateDIV2_c4(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1188 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1189 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1190 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1191
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1192 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1193 fprintf(stderr, "Converting audio rate / 2\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1194 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1195 src = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1196 dst = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1197 switch (format & 0xFF) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1198 case 8:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1199 for ( i=cvt->len_cvt/8; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1200 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1201 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1202 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1203 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1204 src += 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1205 dst += 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1206 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1207 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1208 case 16:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1209 for ( i=cvt->len_cvt/16; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1210 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1211 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1212 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1213 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1214 dst[4] = src[4];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1215 dst[5] = src[5];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1216 dst[6] = src[6];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1217 dst[7] = src[7];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1218 src += 16;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1219 dst += 8;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1220 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1221 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1222 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1223 cvt->len_cvt /= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1224 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1225 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1226 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1227 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1228
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1229 /* Convert rate down by multiple of 2, for 5.1 */
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1230 void SDL_RateDIV2_c6(SDL_AudioCVT *cvt, Uint16 format)
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1231 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1232 int i;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1233 Uint8 src, dst;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1234
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1235 #ifdef DEBUG_CONVERT
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1236 fprintf(stderr, "Converting audio rate / 2\n");
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1237 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1238 src = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1239 dst = cvt->buf;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1240 switch (format & 0xFF) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1241 case 8:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1242 for ( i=cvt->len_cvt/12; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1243 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1244 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1245 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1246 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1247 dst[4] = src[4];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1248 dst[5] = src[5];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1249 src += 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1250 dst += 6;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1251 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1252 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1253 case 16:
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1254 for ( i=cvt->len_cvt/24; i; --i ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1255 dst[0] = src[0];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1256 dst[1] = src[1];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1257 dst[2] = src[2];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1258 dst[3] = src[3];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1259 dst[4] = src[4];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1260 dst[5] = src[5];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1261 dst[6] = src[6];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1262 dst[7] = src[7];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1263 dst[8] = src[8];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1264 dst[9] = src[9];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1265 dst[10] = src[10];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1266 dst[11] = src[11];
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1267 src += 24;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1268 dst += 12;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1269 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1270 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1271 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1272 cvt->len_cvt /= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1273 if ( cvt->filters[++cvt->filter_index] ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1274 cvt->filters[cvt->filter_index](cvt, format);
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1275 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1276 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1277
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1278 /* Very slow rate conversion routine */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1279 void SDL_RateSLOW(SDL_AudioCVT *cvt, Uint16 format)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1280 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1281 double ipos;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1282 int i, clen;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1283
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1284 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1285 fprintf(stderr, "Converting audio rate * %4.4f\n", 1.0/cvt->rate_incr);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1286 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1287 clen = (int)((double)cvt->len_cvt / cvt->rate_incr);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1288 if ( cvt->rate_incr > 1.0 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1289 switch (format & 0xFF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1290 case 8: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1291 Uint8 *output;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1292
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1293 output = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1294 ipos = 0.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1295 for ( i=clen; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1296 *output = cvt->buf[(int)ipos];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1297 ipos += cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1298 output += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1299 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1300 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1301 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1302
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1303 case 16: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1304 Uint16 *output;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1305
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1306 clen &= ~1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1307 output = (Uint16 *)cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1308 ipos = 0.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1309 for ( i=clen/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1310 output=((Uint16 )cvt->buf)[(int)ipos];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1311 ipos += cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1312 output += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1313 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1314 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1315 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1316 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1317 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1318 switch (format & 0xFF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1319 case 8: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1320 Uint8 *output;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1321
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1322 output = cvt->buf+clen;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1323 ipos = (double)cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1324 for ( i=clen; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1325 ipos -= cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1326 output -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1327 *output = cvt->buf[(int)ipos];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1328 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1329 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1330 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1331
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1332 case 16: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1333 Uint16 *output;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1334
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1335 clen &= ~1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1336 output = (Uint16 *)(cvt->buf+clen);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1337 ipos = (double)cvt->len_cvt/2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1338 for ( i=clen/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1339 ipos -= cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1340 output -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1341 output=((Uint16 )cvt->buf)[(int)ipos];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1342 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1343 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1344 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1345 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1346 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1347 cvt->len_cvt = clen;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1348 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1349 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1350 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1351 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1352
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1353 int SDL_ConvertAudio(SDL_AudioCVT *cvt)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1354 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1355 /* Make sure there's data to convert */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1356 if ( cvt->buf == NULL ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1357 SDL_SetError("No buffer allocated for conversion");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1358 return(-1);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1359 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1360 /* Return okay if no conversion is necessary */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1361 cvt->len_cvt = cvt->len;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1362 if ( cvt->filters[0] == NULL ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1363 return(0);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1364 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1365
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1366 /* Set up the conversion and go! */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1367 cvt->filter_index = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1368 cvt->filters[0](cvt, cvt->src_format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1369 return(0);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1370 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1371
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1372 /* Creates a set of audio filters to convert from one format to another.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1373 Returns -1 if the format conversion is not supported, or 1 if the
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1374 audio filter is set up.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1375 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1376
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1377 int SDL_BuildAudioCVT(SDL_AudioCVT *cvt,
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1378 Uint16 src_format, Uint8 src_channels, int src_rate,
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1379 Uint16 dst_format, Uint8 dst_channels, int dst_rate)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1380 {
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1381 /*printf("Build format %04x->%04x, channels %u->%u, rate %d->%d\n",
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1382 src_format, dst_format, src_channels, dst_channels, src_rate, dst_rate);*/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1383 /* Start off with no conversion necessary */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1384 cvt->needed = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1385 cvt->filter_index = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1386 cvt->filters[0] = NULL;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1387 cvt->len_mult = 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1388 cvt->len_ratio = 1.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1389
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1390 /* First filter: Endian conversion from src to dst */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1391 if ( (src_format & 0x1000) != (dst_format & 0x1000)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1392 && ((src_format & 0xff) != 8) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1393 cvt->filters[cvt->filter_index++] = SDL_ConvertEndian;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1394 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1395
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1396 /* Second filter: Sign conversion -- signed/unsigned */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1397 if ( (src_format & 0x8000) != (dst_format & 0x8000) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1398 cvt->filters[cvt->filter_index++] = SDL_ConvertSign;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1399 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1400
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1401 /* Next filter: Convert 16 bit <--> 8 bit PCM */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1402 if ( (src_format & 0xFF) != (dst_format & 0xFF) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1403 switch (dst_format&0x10FF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1404 case AUDIO_U8:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1405 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1406 SDL_Convert8;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1407 cvt->len_ratio /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1408 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1409 case AUDIO_U16LSB:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1410 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1411 SDL_Convert16LSB;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1412 cvt->len_mult *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1413 cvt->len_ratio *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1414 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1415 case AUDIO_U16MSB:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1416 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1417 SDL_Convert16MSB;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1418 cvt->len_mult *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1419 cvt->len_ratio *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1420 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1421 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1422 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1423
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1424 /* Last filter: Mono/Stereo conversion */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1425 if ( src_channels != dst_channels ) {
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1426 if ( (src_channels == 1) && (dst_channels > 1) ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1427 cvt->filters[cvt->filter_index++] =
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1428 SDL_ConvertStereo;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1429 cvt->len_mult *= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1430 src_channels = 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1431 cvt->len_ratio *= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1432 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1433 if ( (src_channels == 2) &&
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1434 (dst_channels == 6) ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1435 cvt->filters[cvt->filter_index++] =
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1436 SDL_ConvertSurround;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1437 src_channels = 6;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1438 cvt->len_mult *= 3;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1439 cvt->len_ratio *= 3;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1440 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1441 if ( (src_channels == 2) &&
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1442 (dst_channels == 4) ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1443 cvt->filters[cvt->filter_index++] =
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1444 SDL_ConvertSurround_4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1445 src_channels = 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1446 cvt->len_mult *= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1447 cvt->len_ratio *= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1448 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1449 while ( (src_channels*2) <= dst_channels ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1450 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1451 SDL_ConvertStereo;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1452 cvt->len_mult *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1453 src_channels *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1454 cvt->len_ratio *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1455 }
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1456 if ( (src_channels == 6) &&
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1457 (dst_channels <= 2) ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1458 cvt->filters[cvt->filter_index++] =
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1459 SDL_ConvertStrip;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1460 src_channels = 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1461 cvt->len_ratio /= 3;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1462 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1463 if ( (src_channels == 6) &&
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1464 (dst_channels == 4) ) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1465 cvt->filters[cvt->filter_index++] =
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1466 SDL_ConvertStrip_2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1467 src_channels = 4;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1468 cvt->len_ratio /= 2;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1469 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1470 /* This assumes that 4 channel audio is in the format:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1471 Left {front/back} + Right {front/back}
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1472 so converting to L/R stereo works properly.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1473 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1474 while ( ((src_channels%2) == 0) &&
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1475 ((src_channels/2) >= dst_channels) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1476 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1477 SDL_ConvertMono;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1478 src_channels /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1479 cvt->len_ratio /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1480 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1481 if ( src_channels != dst_channels ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1482 /* Uh oh.. */;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1483 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1484 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1485
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1486 /* Do rate conversion */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1487 cvt->rate_incr = 0.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1488 if ( (src_rate/100) != (dst_rate/100) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1489 Uint32 hi_rate, lo_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1490 int len_mult;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1491 double len_ratio;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1492 void (rate_cvt)(SDL_AudioCVT cvt, Uint16 format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1493
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1494 if ( src_rate > dst_rate ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1495 hi_rate = src_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1496 lo_rate = dst_rate;
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1497 switch (src_channels) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1498 case 1: rate_cvt = SDL_RateDIV2; break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1499 case 2: rate_cvt = SDL_RateDIV2_c2; break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1500 case 4: rate_cvt = SDL_RateDIV2_c4; break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1501 case 6: rate_cvt = SDL_RateDIV2_c6; break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1502 default: return -1;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1503 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1504 len_mult = 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1505 len_ratio = 0.5;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1506 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1507 hi_rate = dst_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1508 lo_rate = src_rate;
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1509 switch (src_channels) {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1510 case 1: rate_cvt = SDL_RateMUL2; break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1511 case 2: rate_cvt = SDL_RateMUL2_c2; break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1512 case 4: rate_cvt = SDL_RateMUL2_c4; break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1513 case 6: rate_cvt = SDL_RateMUL2_c6; break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1514 default: return -1;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1515 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1516 len_mult = 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1517 len_ratio = 2.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1518 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1519 /* If hi_rate = lo_rate2^x then conversion is easy /
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1520 while ( ((lo_rate*2)/100) <= (hi_rate/100) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1521 cvt->filters[cvt->filter_index++] = rate_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1522 cvt->len_mult *= len_mult;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1523 lo_rate *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1524 cvt->len_ratio *= len_ratio;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1525 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1526 /* We may need a slow conversion here to finish up */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1527 if ( (lo_rate/100) != (hi_rate/100) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1528 #if 1
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1529 /* The problem with this is that if the input buffer is
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1530 say 1K, and the conversion rate is say 1.1, then the
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1531 output buffer is 1.1K, which may not be an acceptable
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1532 buffer size for the audio driver (not a power of 2)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1533 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1534 /* For now, punt and hope the rate distortion isn't great.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1535 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1536 #else
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1537 if ( src_rate < dst_rate ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1538 cvt->rate_incr = (double)lo_rate/hi_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1539 cvt->len_mult *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1540 cvt->len_ratio /= cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1541 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1542 cvt->rate_incr = (double)hi_rate/lo_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1543 cvt->len_ratio *= cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1544 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1545 cvt->filters[cvt->filter_index++] = SDL_RateSLOW;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1546 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1547 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1548 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1549
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1550 /* Set up the filter information */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1551 if ( cvt->filter_index != 0 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1552 cvt->needed = 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1553 cvt->src_format = src_format;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1554 cvt->dst_format = dst_format;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1555 cvt->len = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1556 cvt->buf = NULL;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1557 cvt->filters[cvt->filter_index] = NULL;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1558 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1559 return(cvt->needed);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1560 }

Mercurial > sdl-ios-xcode

annotate src/audio/SDL_audiocvt.c @ 1228:f4a3a4129d04