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

annotate src/audio/SDL_audiocvt.c @ 4001:6831b8723a85 SDL-1.2

Don't initialize the audio buffer passed to the application's audio callback, since they are expected to entirely fill it with data or silence. For legacy apps that might expect the buffer to already have silence and thus may not fill the buffer in the callback, there's an environment variable to expose the old behaviour. Fixes Bugzilla #416.

author	Ryan C. Gordon <icculus@icculus.org>
date	Thu, 05 Jul 2007 02:24:36 +0000
parents	74e828c64315
children	a1b03ba2fcd0

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
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1011 diff changeset	3 Copyright (C) 1997-2006 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
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1011 diff changeset	6 modify it under the terms of the GNU Lesser General Public
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	7 License as published by the Free Software Foundation; either
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1011 diff changeset	8 version 2.1 of the License, or (at your option) any later version.
0 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
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1011 diff changeset	13 Lesser General Public License for more details.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	14
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1011 diff changeset	15 You should have received a copy of the GNU Lesser General Public
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1011 diff changeset	16 License along with this library; if not, write to the Free Software
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1011 diff changeset	17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
0 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 */
1402 d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	22 #include "SDL_config.h"
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	23
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	24 /* Functions for audio drivers to perform runtime conversion of audio format */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	25
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	26 #include "SDL_audio.h"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	27
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	28
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	29 /* Effectively mix right and left channels into a single channel */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	30 void SDLCALL SDL_ConvertMono(SDL_AudioCVT *cvt, Uint16 format)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	31 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	32 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	33 Sint32 sample;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	34
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	35 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	36 fprintf(stderr, "Converting to mono\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	37 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	38 switch (format&0x8018) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	39
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	40 case AUDIO_U8: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	41 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	42
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	43 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	44 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	45 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	46 sample = src[0] + src[1];
3880 74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	47 *dst = (Uint8)(sample / 2);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	48 src += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	49 dst += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	50 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	51 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	52 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	53
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	54 case AUDIO_S8: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	55 Sint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	56
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	57 src = (Sint8 *)cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	58 dst = (Sint8 *)cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	59 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	60 sample = src[0] + src[1];
3880 74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	61 *dst = (Sint8)(sample / 2);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	62 src += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	63 dst += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	64 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	65 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	66 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	67
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	68 case AUDIO_U16: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	69 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	70
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	71 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	72 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	73 if ( (format & 0x1000) == 0x1000 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	74 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	75 sample = (Uint16)((src[0]<<8)\|src[1])+
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	76 (Uint16)((src[2]<<8)\|src[3]);
3880 74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	77 sample /= 2;
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	78 dst[1] = (sample&0xFF);
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	79 sample >>= 8;
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	80 dst[0] = (sample&0xFF);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	81 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	82 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	83 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	84 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	85 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	86 sample = (Uint16)((src[1]<<8)\|src[0])+
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	87 (Uint16)((src[3]<<8)\|src[2]);
3880 74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	88 sample /= 2;
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	89 dst[0] = (sample&0xFF);
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	90 sample >>= 8;
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	91 dst[1] = (sample&0xFF);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	92 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	93 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	94 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	95 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	96 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	97 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	98
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	99 case AUDIO_S16: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	100 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	101
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	102 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	103 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	104 if ( (format & 0x1000) == 0x1000 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	105 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	106 sample = (Sint16)((src[0]<<8)\|src[1])+
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	107 (Sint16)((src[2]<<8)\|src[3]);
3880 74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	108 sample /= 2;
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	109 dst[1] = (sample&0xFF);
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	110 sample >>= 8;
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	111 dst[0] = (sample&0xFF);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	112 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	113 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	114 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	115 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	116 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	117 sample = (Sint16)((src[1]<<8)\|src[0])+
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	118 (Sint16)((src[3]<<8)\|src[2]);
3880 74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	119 sample /= 2;
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	120 dst[0] = (sample&0xFF);
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	121 sample >>= 8;
74e828c64315 Fixed bug #292 Sam Lantinga <slouken@libsdl.org> parents: 3863 diff changeset	122 dst[1] = (sample&0xFF);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	123 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	124 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	125 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	126 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	127 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	128 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	129 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	130 cvt->len_cvt /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	131 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	132 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	133 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	134 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	135
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	136 /* Discard top 4 channels */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	137 void SDLCALL SDL_ConvertStrip(SDL_AudioCVT *cvt, Uint16 format)
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	138 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	139 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	140 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	141
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	142 #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	143 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	144 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	145 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	146
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	147 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	148 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	149
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	150 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	151 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	152 for ( i=cvt->len_cvt/6; i; --i ) {
1428 5f52867ba65c Update for Visual C++ 6.0 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	153 dst[0] = src[0];
5f52867ba65c Update for Visual C++ 6.0 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	154 dst[1] = src[1];
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	155 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	156 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	157 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	158 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	159 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	160
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	161 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	162 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	163
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	164 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	165 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	166 for ( i=cvt->len_cvt/6; i; --i ) {
1428 5f52867ba65c Update for Visual C++ 6.0 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	167 dst[0] = src[0];
5f52867ba65c Update for Visual C++ 6.0 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	168 dst[1] = src[1];
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	169 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	170 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	171 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	172 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	173 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	174
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	175 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	176 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	177
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	178 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	179 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	180 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	181 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	182 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	183 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	184 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	185 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	186 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	187 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	188 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	189 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	190 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	191 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	192 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	193 } else {
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/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	195 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	196 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	197 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	198 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	199 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	200 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	201 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	202 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	203 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	204 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	205 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	206 }
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 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	209
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	210 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	211 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	212
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	213 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	214 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	215 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	216 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	217 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	218 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	219 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	220 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	221 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	222 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	223 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	224 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	225 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	226 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	227 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	228 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	229 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	230 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	231 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	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 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	234 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	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 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	237 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	238 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	239 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	240 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	241 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	242 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	243 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	244 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	245 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	246 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	247 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	248 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	249 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	250
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 /* Discard top 2 channels of 6 */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	253 void SDLCALL SDL_ConvertStrip_2(SDL_AudioCVT *cvt, Uint16 format)
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	254 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	255 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	256 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	257
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	258 #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	259 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	260 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	261 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	262
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	263 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	264 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	265
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	266 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	267 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	268 for ( i=cvt->len_cvt/4; i; --i ) {
1428 5f52867ba65c Update for Visual C++ 6.0 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	269 dst[0] = src[0];
5f52867ba65c Update for Visual C++ 6.0 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	270 dst[1] = src[1];
942 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 += 4;
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 += 2;
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 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	275 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	276
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	277 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	278 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	279
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	280 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	281 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	282 for ( i=cvt->len_cvt/4; i; --i ) {
1428 5f52867ba65c Update for Visual C++ 6.0 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	283 dst[0] = src[0];
5f52867ba65c Update for Visual C++ 6.0 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	284 dst[1] = src[1];
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	285 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	286 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	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 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	292 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	293
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	294 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	295 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	296 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	297 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	298 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	299 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	300 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	301 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	302 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	303 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	304 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	305 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	306 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	307 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	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 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	310 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	311 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	312 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	313 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	314 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	315 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	316 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	317 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	318 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	319 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	320 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	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 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	324 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	325
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	326 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	327 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	328
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	329 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	330 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	331 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	332 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	333 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	334 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	335 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	336 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	337 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	338 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	339 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	340 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	341 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	342 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	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 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	345 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	346 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	347 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	348 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	349 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	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 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	352 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	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 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	355 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	356 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	357 }
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 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	360 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	361 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	362 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	363 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	364 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	365 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	366
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	367 /* Duplicate a mono channel to both stereo channels */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	368 void SDLCALL SDL_ConvertStereo(SDL_AudioCVT *cvt, Uint16 format)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	369 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	370 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	371
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	372 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	373 fprintf(stderr, "Converting to stereo\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	374 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	375 if ( (format & 0xFF) == 16 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	376 Uint16 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	377
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	378 src = (Uint16 *)(cvt->buf+cvt->len_cvt);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	379 dst = (Uint16 )(cvt->buf+cvt->len_cvt2);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	380 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	381 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	382 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	383 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	384 dst[1] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	385 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	386 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	387 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	388
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	389 src = cvt->buf+cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	390 dst = cvt->buf+cvt->len_cvt*2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	391 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	392 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	393 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	394 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	395 dst[1] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	396 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	397 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	398 cvt->len_cvt *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	399 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	400 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	401 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	402 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	403
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	404
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	405 /* Duplicate a stereo channel to a pseudo-5.1 stream */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	406 void SDLCALL SDL_ConvertSurround(SDL_AudioCVT *cvt, Uint16 format)
942 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 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	409
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	410 #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	411 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	412 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	413 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	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 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	416 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	417
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	418 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	419 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	420 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	421 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	422 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	423 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	424 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	425 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	426 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	427 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	428 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	429 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	430 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	431 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	432 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	433 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	434 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	435
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	436 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	437 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	438
1011 4095d9ca23f2 * empty log message * Sam Lantinga <slouken@libsdl.org> parents: 942 diff changeset	439 src = (Sint8 *)cvt->buf+cvt->len_cvt;
4095d9ca23f2 * empty log message * Sam Lantinga <slouken@libsdl.org> parents: 942 diff changeset	440 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	441 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	442 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	443 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	444 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	445 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	446 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	447 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	448 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	449 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	450 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	451 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	452 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	453 }
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 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	456
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	457 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	458 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	459 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	460
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	461 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	462 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	463
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	464 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	465 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	466 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	467 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	468 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	469 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	470 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	471 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	472 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	473 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	474 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	475 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	476 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	477
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[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	479 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	480 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	481 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	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 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	484 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	485 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	486 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	487 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	488 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	489 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	490 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	491 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	492 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	493 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	494 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	495 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	496 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	497 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	498 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	499 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	500 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	501
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[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	503 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	504 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	505 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	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 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	508 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	509 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	510 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	511 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	512 }
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 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	515
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	516 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	517 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	518 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	519
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	520 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	521 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	522
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	523 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	524 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	525 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	526 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	527 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	528 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	529 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	530 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	531 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	532 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	533 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	534 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	535 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	536
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	537 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	538 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	539 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	540 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	541
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	542 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	543 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	544 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	545 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	546 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	547 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	548 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	549 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	550 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	551 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	552 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	553 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	554 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	555 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	556 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	557 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	558 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	559 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	560
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	561 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	562 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	563 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	564 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	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 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	567 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	568 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	569 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	570 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	571 }
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 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	574 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	575 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	576 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	577 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	578 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	579 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	580
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	581
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	582 /* Duplicate a stereo channel to a pseudo-4.0 stream */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	583 void SDLCALL SDL_ConvertSurround_4(SDL_AudioCVT *cvt, Uint16 format)
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	584 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	585 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	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 #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	588 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	589 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	590 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	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 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	593 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	594
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	595 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	596 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	597 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	598 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	599 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	600 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	601 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	602 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	603 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	604 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	605 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	606 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	607 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	608 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	609 break;
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 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	612 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	613
1011 4095d9ca23f2 * empty log message * Sam Lantinga <slouken@libsdl.org> parents: 942 diff changeset	614 src = (Sint8 *)cvt->buf+cvt->len_cvt;
4095d9ca23f2 * empty log message * Sam Lantinga <slouken@libsdl.org> parents: 942 diff changeset	615 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	616 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	617 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	618 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	619 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	620 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	621 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	622 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	623 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	624 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	625 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	626 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	627 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	628 break;
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 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	631 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	632 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	633
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	634 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	635 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	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 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	638 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	639 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	640 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	641 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	642 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	643 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	644 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	645 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	646 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	647 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	648 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	649 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	650
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	651 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	652 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	653 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	654 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	655 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	656 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	657 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	658 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	659 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	660 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	661 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	662 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	663 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	664 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	665 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	666 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	667 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	668 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	669
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	670 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	671 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	672 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	673 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	674 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	675 }
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 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	678
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	679 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	680 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	681 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	682
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	683 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	684 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	685
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	686 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	687 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	688 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	689 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	690 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	691 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	692 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	693 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	694 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	695 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	696 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	697 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	698 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	699
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	700 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	701 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	702 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	703 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	704 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	705 } else {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	706 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	707 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	708 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	709 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	710 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	711 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	712 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	713 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	714 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	715 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	716 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	717 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	718
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	719 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	720 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	721 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	722 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	723 }
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 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	727 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	728 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	729 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	730 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	731 }
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
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	734
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	735 /* Convert 8-bit to 16-bit - LSB */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	736 void SDLCALL SDL_Convert16LSB(SDL_AudioCVT *cvt, Uint16 format)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	737 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	738 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	739 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	740
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	741 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	742 fprintf(stderr, "Converting to 16-bit LSB\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	743 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	744 src = cvt->buf+cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	745 dst = cvt->buf+cvt->len_cvt*2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	746 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	747 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	748 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	749 dst[1] = *src;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	750 dst[0] = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	751 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	752 format = ((format & ~0x0008) \| AUDIO_U16LSB);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	753 cvt->len_cvt *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	754 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	755 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	756 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	757 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	758 /* Convert 8-bit to 16-bit - MSB */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	759 void SDLCALL SDL_Convert16MSB(SDL_AudioCVT *cvt, Uint16 format)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	760 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	761 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	762 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	763
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	764 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	765 fprintf(stderr, "Converting to 16-bit MSB\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	766 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	767 src = cvt->buf+cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	768 dst = cvt->buf+cvt->len_cvt*2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	769 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	770 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	771 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	772 dst[0] = *src;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	773 dst[1] = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	774 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	775 format = ((format & ~0x0008) \| AUDIO_U16MSB);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	776 cvt->len_cvt *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	777 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	778 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	779 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	780 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	781
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	782 /* Convert 16-bit to 8-bit */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	783 void SDLCALL SDL_Convert8(SDL_AudioCVT *cvt, Uint16 format)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	784 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	785 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	786 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	787
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	788 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	789 fprintf(stderr, "Converting to 8-bit\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	790 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	791 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	792 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	793 if ( (format & 0x1000) != 0x1000 ) { /* Little endian */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	794 ++src;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	795 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	796 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	797 dst = src;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	798 src += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	799 dst += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	800 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	801 format = ((format & ~0x9010) \| AUDIO_U8);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	802 cvt->len_cvt /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	803 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	804 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	805 }
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 /* Toggle signed/unsigned */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	809 void SDLCALL SDL_ConvertSign(SDL_AudioCVT *cvt, Uint16 format)
0 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 *data;
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 audio signedness\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 data = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	818 if ( (format & 0xFF) == 16 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	819 if ( (format & 0x1000) != 0x1000 ) { /* Little endian */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	820 ++data;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	821 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	822 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	823 *data ^= 0x80;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	824 data += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	825 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	826 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	827 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	828 *data++ ^= 0x80;
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 format = (format ^ 0x8000);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	832 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	833 cvt->filters[cvt->filter_index](cvt, 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 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	836
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	837 /* Toggle endianness */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	838 void SDLCALL SDL_ConvertEndian(SDL_AudioCVT *cvt, Uint16 format)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	839 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	840 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	841 Uint8 *data, tmp;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	842
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	843 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	844 fprintf(stderr, "Converting audio endianness\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	845 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	846 data = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	847 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	848 tmp = data[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	849 data[0] = data[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	850 data[1] = tmp;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	851 data += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	852 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	853 format = (format ^ 0x1000);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	854 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	855 cvt->filters[cvt->filter_index](cvt, format);
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
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	859 /* Convert rate up by multiple of 2 */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	860 void SDLCALL SDL_RateMUL2(SDL_AudioCVT *cvt, Uint16 format)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	861 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	862 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	863 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	864
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	865 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	866 fprintf(stderr, "Converting audio rate * 2\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	867 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	868 src = cvt->buf+cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	869 dst = cvt->buf+cvt->len_cvt*2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	870 switch (format & 0xFF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	871 case 8:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	872 for ( i=cvt->len_cvt; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	873 src -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	874 dst -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	875 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	876 dst[1] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	877 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	878 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	879 case 16:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	880 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	881 src -= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	882 dst -= 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	883 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	884 dst[1] = src[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	885 dst[2] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	886 dst[3] = src[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	887 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	888 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	889 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	890 cvt->len_cvt *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	891 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	892 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	893 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	894 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	895
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	896
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	897 /* Convert rate up by multiple of 2, for stereo */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	898 void SDLCALL SDL_RateMUL2_c2(SDL_AudioCVT *cvt, Uint16 format)
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	899 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	900 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	901 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	902
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	903 #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	904 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	905 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	906 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	907 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	908 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	909 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	910 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	911 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	912 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	913 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	914 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	915 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	916 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	917 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	918 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	919 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	920 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	921 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	922 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	923 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	924 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	925 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	926 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	927 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	928 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	929 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	930 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	931 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	932 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	933 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	934 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	935 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	936 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	937 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	938 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	939
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	940 /* Convert rate up by multiple of 2, for quad */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	941 void SDLCALL SDL_RateMUL2_c4(SDL_AudioCVT *cvt, Uint16 format)
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	942 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	943 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	944 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	945
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	946 #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	947 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	948 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	949 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	950 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	951 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	952 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	953 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	954 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	955 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	956 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	957 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	958 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	959 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	960 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	961 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	962 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	963 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	964 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	965 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	966 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	967 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	968 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	969 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	970 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	971 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	972 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	973 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	974 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	975 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	976 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	977 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	978 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	979 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	980 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	981 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	982 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	983 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	984 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	985 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	986 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	987 break;
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 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	990 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	991 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	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 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	994
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 /* Convert rate up by multiple of 2, for 5.1 */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	997 void SDLCALL SDL_RateMUL2_c6(SDL_AudioCVT *cvt, Uint16 format)
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	998 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	999 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	1000 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	1001
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1002 #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	1003 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	1004 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1005 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	1006 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	1007 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	1008 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	1009 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	1010 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	1011 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	1012 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	1013 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	1014 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	1015 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	1016 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	1017 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	1018 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	1019 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	1020 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	1021 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	1022 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	1023 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	1024 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1025 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1026 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	1027 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	1028 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	1029 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	1030 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	1031 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	1032 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	1033 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	1034 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	1035 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	1036 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	1037 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	1038 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	1039 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	1040 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	1041 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	1042 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	1043 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	1044 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	1045 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	1046 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	1047 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	1048 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	1049 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	1050 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	1051 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	1052 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	1053 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	1054 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1055 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1056 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1057 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	1058 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	1059 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	1060 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1061 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1062
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1063 /* Convert rate down by multiple of 2 */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	1064 void SDLCALL SDL_RateDIV2(SDL_AudioCVT *cvt, Uint16 format)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1065 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1066 int i;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1067 Uint8 src, dst;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1068
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1069 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1070 fprintf(stderr, "Converting audio rate / 2\n");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1071 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1072 src = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1073 dst = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1074 switch (format & 0xFF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1075 case 8:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1076 for ( i=cvt->len_cvt/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1077 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1078 src += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1079 dst += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1080 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1081 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1082 case 16:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1083 for ( i=cvt->len_cvt/4; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1084 dst[0] = src[0];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1085 dst[1] = src[1];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1086 src += 4;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1087 dst += 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1088 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1089 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1090 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1091 cvt->len_cvt /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1092 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1093 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1094 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1095 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1096
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1097
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1098 /* Convert rate down by multiple of 2, for stereo */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	1099 void SDLCALL SDL_RateDIV2_c2(SDL_AudioCVT *cvt, Uint16 format)
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1100 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1101 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	1102 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	1103
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1104 #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	1105 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	1106 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1107 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	1108 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	1109 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	1110 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	1111 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	1112 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	1113 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	1114 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	1115 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	1116 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1117 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1118 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	1119 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	1120 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	1121 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	1122 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	1123 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	1124 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	1125 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	1126 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1127 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1128 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1129 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	1130 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	1131 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	1132 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1133 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1134
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1135
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1136 /* Convert rate down by multiple of 2, for quad */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	1137 void SDLCALL SDL_RateDIV2_c4(SDL_AudioCVT *cvt, Uint16 format)
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1138 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1139 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	1140 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	1141
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1142 #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	1143 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	1144 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1145 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	1146 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	1147 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	1148 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	1149 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	1150 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	1151 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	1152 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	1153 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	1154 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	1155 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	1156 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1157 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1158 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	1159 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	1160 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	1161 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	1162 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	1163 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	1164 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	1165 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	1166 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	1167 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	1168 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	1169 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	1170 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1171 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1172 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1173 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	1174 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	1175 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	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 }
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 /* Convert rate down by multiple of 2, for 5.1 */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	1180 void SDLCALL SDL_RateDIV2_c6(SDL_AudioCVT *cvt, Uint16 format)
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1181 {
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1182 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	1183 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	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 #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	1186 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	1187 #endif
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1188 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	1189 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	1190 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	1191 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	1192 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	1193 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	1194 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	1195 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	1196 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	1197 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	1198 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	1199 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	1200 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	1201 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1202 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1203 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	1204 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	1205 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	1206 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	1207 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	1208 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	1209 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	1210 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	1211 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	1212 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	1213 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	1214 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	1215 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	1216 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	1217 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	1218 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	1219 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1220 break;
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1221 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1222 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	1223 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	1224 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	1225 }
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
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1228 /* Very slow rate conversion routine */
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	1229 void SDLCALL SDL_RateSLOW(SDL_AudioCVT *cvt, Uint16 format)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1230 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1231 double ipos;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1232 int i, clen;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1233
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1234 #ifdef DEBUG_CONVERT
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1235 fprintf(stderr, "Converting audio rate * %4.4f\n", 1.0/cvt->rate_incr);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1236 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1237 clen = (int)((double)cvt->len_cvt / cvt->rate_incr);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1238 if ( cvt->rate_incr > 1.0 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1239 switch (format & 0xFF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1240 case 8: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1241 Uint8 *output;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1242
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1243 output = cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1244 ipos = 0.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1245 for ( i=clen; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1246 *output = cvt->buf[(int)ipos];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1247 ipos += cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1248 output += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1249 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1250 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1251 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1252
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1253 case 16: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1254 Uint16 *output;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1255
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1256 clen &= ~1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1257 output = (Uint16 *)cvt->buf;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1258 ipos = 0.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1259 for ( i=clen/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1260 output=((Uint16 )cvt->buf)[(int)ipos];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1261 ipos += cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1262 output += 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1263 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1264 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1265 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1266 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1267 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1268 switch (format & 0xFF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1269 case 8: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1270 Uint8 *output;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1271
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1272 output = cvt->buf+clen;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1273 ipos = (double)cvt->len_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1274 for ( i=clen; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1275 ipos -= cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1276 output -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1277 *output = cvt->buf[(int)ipos];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1278 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1279 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1280 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1281
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1282 case 16: {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1283 Uint16 *output;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1284
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1285 clen &= ~1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1286 output = (Uint16 *)(cvt->buf+clen);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1287 ipos = (double)cvt->len_cvt/2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1288 for ( i=clen/2; i; --i ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1289 ipos -= cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1290 output -= 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1291 output=((Uint16 )cvt->buf)[(int)ipos];
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1292 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1293 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1294 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1295 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1296 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1297 cvt->len_cvt = clen;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1298 if ( cvt->filters[++cvt->filter_index] ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1299 cvt->filters[cvt->filter_index](cvt, format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1300 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1301 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1302
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1303 int SDL_ConvertAudio(SDL_AudioCVT *cvt)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1304 {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1305 /* Make sure there's data to convert */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1306 if ( cvt->buf == NULL ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1307 SDL_SetError("No buffer allocated for conversion");
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1308 return(-1);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1309 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1310 /* Return okay if no conversion is necessary */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1311 cvt->len_cvt = cvt->len;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1312 if ( cvt->filters[0] == NULL ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1313 return(0);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1314 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1315
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1316 /* Set up the conversion and go! */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1317 cvt->filter_index = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1318 cvt->filters[0](cvt, cvt->src_format);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1319 return(0);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1320 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1321
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1322 /* Creates a set of audio filters to convert from one format to another.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1323 Returns -1 if the format conversion is not supported, or 1 if the
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1324 audio filter is set up.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1325 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1326
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1327 int SDL_BuildAudioCVT(SDL_AudioCVT *cvt,
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1328 Uint16 src_format, Uint8 src_channels, int src_rate,
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1329 Uint16 dst_format, Uint8 dst_channels, int dst_rate)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1330 {
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1331 /*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	1332 src_format, dst_format, src_channels, dst_channels, src_rate, dst_rate);*/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1333 /* Start off with no conversion necessary */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1334 cvt->needed = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1335 cvt->filter_index = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1336 cvt->filters[0] = NULL;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1337 cvt->len_mult = 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1338 cvt->len_ratio = 1.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1339
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1340 /* First filter: Endian conversion from src to dst */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1341 if ( (src_format & 0x1000) != (dst_format & 0x1000)
3863 4e23720e4278 Only convert endianness if both src and dest are 16bits Patrice Mandin <patmandin@gmail.com> parents: 1769 diff changeset	1342 && ((src_format & 0xff) == 16) && ((dst_format & 0xff) == 16)) {
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1343 cvt->filters[cvt->filter_index++] = SDL_ConvertEndian;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1344 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1345
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1346 /* Second filter: Sign conversion -- signed/unsigned */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1347 if ( (src_format & 0x8000) != (dst_format & 0x8000) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1348 cvt->filters[cvt->filter_index++] = SDL_ConvertSign;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1349 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1350
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1351 /* Next filter: Convert 16 bit <--> 8 bit PCM */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1352 if ( (src_format & 0xFF) != (dst_format & 0xFF) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1353 switch (dst_format&0x10FF) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1354 case AUDIO_U8:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1355 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1356 SDL_Convert8;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1357 cvt->len_ratio /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1358 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1359 case AUDIO_U16LSB:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1360 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1361 SDL_Convert16LSB;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1362 cvt->len_mult *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1363 cvt->len_ratio *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1364 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1365 case AUDIO_U16MSB:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1366 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1367 SDL_Convert16MSB;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1368 cvt->len_mult *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1369 cvt->len_ratio *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1370 break;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1371 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1372 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1373
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1374 /* Last filter: Mono/Stereo conversion */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1375 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	1376 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	1377 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	1378 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	1379 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	1380 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	1381 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	1382 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1383 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	1384 (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	1385 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	1386 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	1387 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	1388 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	1389 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	1390 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1391 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	1392 (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	1393 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	1394 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	1395 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	1396 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	1397 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	1398 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1399 while ( (src_channels*2) <= dst_channels ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1400 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1401 SDL_ConvertStereo;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1402 cvt->len_mult *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1403 src_channels *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1404 cvt->len_ratio *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1405 }
942 41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1406 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	1407 (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	1408 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	1409 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	1410 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	1411 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	1412 }
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	1413 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	1414 (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	1415 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	1416 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	1417 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	1418 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	1419 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1420 /* This assumes that 4 channel audio is in the format:
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1421 Left {front/back} + Right {front/back}
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1422 so converting to L/R stereo works properly.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1423 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1424 while ( ((src_channels%2) == 0) &&
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1425 ((src_channels/2) >= dst_channels) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1426 cvt->filters[cvt->filter_index++] =
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1427 SDL_ConvertMono;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1428 src_channels /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1429 cvt->len_ratio /= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1430 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1431 if ( src_channels != dst_channels ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1432 /* Uh oh.. */;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1433 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1434 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1435
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1436 /* Do rate conversion */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1437 cvt->rate_incr = 0.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1438 if ( (src_rate/100) != (dst_rate/100) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1439 Uint32 hi_rate, lo_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1440 int len_mult;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1441 double len_ratio;
1769 290b5baf2fca Fixed bug #215 Sam Lantinga <slouken@libsdl.org> parents: 1428 diff changeset	1442 void (SDLCALL rate_cvt)(SDL_AudioCVT cvt, Uint16 format);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1443
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1444 if ( src_rate > dst_rate ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1445 hi_rate = src_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1446 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	1447 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	1448 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	1449 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	1450 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	1451 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	1452 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	1453 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1454 len_mult = 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1455 len_ratio = 0.5;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1456 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1457 hi_rate = dst_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1458 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	1459 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	1460 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	1461 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	1462 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	1463 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	1464 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	1465 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1466 len_mult = 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1467 len_ratio = 2.0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1468 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1469 /* If hi_rate = lo_rate2^x then conversion is easy /
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1470 while ( ((lo_rate*2)/100) <= (hi_rate/100) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1471 cvt->filters[cvt->filter_index++] = rate_cvt;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1472 cvt->len_mult *= len_mult;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1473 lo_rate *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1474 cvt->len_ratio *= len_ratio;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1475 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1476 /* We may need a slow conversion here to finish up */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1477 if ( (lo_rate/100) != (hi_rate/100) ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1478 #if 1
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1479 /* The problem with this is that if the input buffer is
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1480 say 1K, and the conversion rate is say 1.1, then the
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1481 output buffer is 1.1K, which may not be an acceptable
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1482 buffer size for the audio driver (not a power of 2)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1483 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1484 /* For now, punt and hope the rate distortion isn't great.
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1485 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1486 #else
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1487 if ( src_rate < dst_rate ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1488 cvt->rate_incr = (double)lo_rate/hi_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1489 cvt->len_mult *= 2;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1490 cvt->len_ratio /= cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1491 } else {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1492 cvt->rate_incr = (double)hi_rate/lo_rate;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1493 cvt->len_ratio *= cvt->rate_incr;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1494 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1495 cvt->filters[cvt->filter_index++] = SDL_RateSLOW;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1496 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1497 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1498 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1499
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1500 /* Set up the filter information */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1501 if ( cvt->filter_index != 0 ) {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1502 cvt->needed = 1;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1503 cvt->src_format = src_format;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1504 cvt->dst_format = dst_format;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1505 cvt->len = 0;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1506 cvt->buf = NULL;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1507 cvt->filters[cvt->filter_index] = NULL;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1508 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1509 return(cvt->needed);
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1510 }

Mercurial > sdl-ios-xcode

annotate src/audio/SDL_audiocvt.c @ 4001:6831b8723a85 SDL-1.2