SDL_sound_CoreAudio: decoders/wav.c annotate

annotate decoders/wav.c @ 191:fbb6101ea4b4

Fixed a small typo.

author	Ryan C. Gordon <icculus@icculus.org>
date	Sun, 30 Dec 2001 23:18:33 +0000
parents	6bb68b3bdcf1
children	6cd07211a235

rev	line source
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	1 /*
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	2 * SDL_sound -- An abstract sound format decoding API.
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	3 * Copyright (C) 2001 Ryan C. Gordon.
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	4 *
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	5 * This library is free software; you can redistribute it and/or
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	6 * modify it under the terms of the GNU Lesser General Public
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	7 * License as published by the Free Software Foundation; either
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	8 * version 2.1 of the License, or (at your option) any later version.
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	9 *
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	10 * This library is distributed in the hope that it will be useful,
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	13 * Lesser General Public License for more details.
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	14 *
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	15 * You should have received a copy of the GNU Lesser General Public
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	16 * License along with this library; if not, write to the Free Software
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	18 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	19
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	20 /*
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	21 * WAV decoder for SDL_sound.
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	22 *
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	23 * This driver handles Microsoft .WAVs, in as many of the thousands of
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	24 * variations as we can.
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	25 *
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	26 * Please see the file COPYING in the source's root directory.
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	27 *
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	28 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	29 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	30
106 40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	31 #if HAVE_CONFIG_H
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	32 # include <config.h>
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	33 #endif
100 6d9fdec2f708 added config.h, added --enable-debug flag, various other changes to the build system fingolfin parents: 64 diff changeset	34
104 103cfcb3c014 Updated to fix build system problem. Ryan C. Gordon <icculus@icculus.org> parents: 100 diff changeset	35 #ifdef SOUND_SUPPORTS_WAV
103cfcb3c014 Updated to fix build system problem. Ryan C. Gordon <icculus@icculus.org> parents: 100 diff changeset	36
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	37 #include <stdio.h>
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	38 #include <stdlib.h>
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	39 #include <string.h>
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	40 #include <assert.h>
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	41
106 40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	42 #include "SDL_sound.h"
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	43
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	44 #define __SDL_SOUND_INTERNAL__
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	45 #include "SDL_sound_internal.h"
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	46
47 ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 40 diff changeset	47 static int WAV_init(void);
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 40 diff changeset	48 static void WAV_quit(void);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	49 static int WAV_open(Sound_Sample sample, const char ext);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	50 static void WAV_close(Sound_Sample *sample);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	51 static Uint32 WAV_read(Sound_Sample *sample);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	52
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 124 diff changeset	53 static const char *extensions_wav[] = { "WAV", NULL };
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	54 const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV =
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	55 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	56 {
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 124 diff changeset	57 extensions_wav,
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	58 "Microsoft WAVE audio format",
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	59 "Ryan C. Gordon <icculus@clutteredmind.org>",
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	60 "http://www.icculus.org/SDL_sound/"
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	61 },
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	62
47 ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 40 diff changeset	63 WAV_init, /* init() method */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 40 diff changeset	64 WAV_quit, /* quit() method */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 40 diff changeset	65 WAV_open, /* open() method */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 40 diff changeset	66 WAV_close, /* close() method */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 40 diff changeset	67 WAV_read /* read() method */
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	68 };
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	69
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	70
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	71 /* Better than SDL_ReadLE16, since you can detect i/o errors... */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	72 static inline int read_le16(SDL_RWops rw, Uint16 ui16)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	73 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	74 int rc = SDL_RWread(rw, ui16, sizeof (Uint16), 1);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	75 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	76 ui16 = SDL_SwapLE16(ui16);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	77 return(1);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	78 } /* read_le16 */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	79
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	80
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	81 /* Better than SDL_ReadLE32, since you can detect i/o errors... */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	82 static inline int read_le32(SDL_RWops rw, Uint32 ui32)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	83 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	84 int rc = SDL_RWread(rw, ui32, sizeof (Uint32), 1);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	85 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	86 ui32 = SDL_SwapLE32(ui32);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	87 return(1);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	88 } /* read_le32 */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	89
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	90
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	91 /* This is just cleaner on the caller's end... */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	92 static inline int read_uint8(SDL_RWops rw, Uint8 ui8)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	93 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	94 int rc = SDL_RWread(rw, ui8, sizeof (Uint8), 1);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	95 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	96 return(1);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	97 } /* read_uint8 */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	98
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	99
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	100 /* Chunk management code... */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	101
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	102 #define riffID 0x46464952 /* "RIFF", in ascii. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	103 #define waveID 0x45564157 /* "WAVE", in ascii. */
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	104 #define factID 0x74636166 /* "fact", in ascii. */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	105
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	106
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	107 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	108 * The FORMAT chunk... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	109 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	110
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	111 #define fmtID 0x20746D66 /* "fmt ", in ascii. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	112
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	113 #define FMT_NORMAL 0x0001 /* Uncompressed waveform data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	114 #define FMT_ADPCM 0x0002 /* ADPCM compressed waveform data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	115
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	116 typedef struct
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	117 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	118 Sint16 iCoef1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	119 Sint16 iCoef2;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	120 } ADPCMCOEFSET;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	121
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	122 typedef struct
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	123 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	124 Uint8 bPredictor;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	125 Uint16 iDelta;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	126 Sint16 iSamp1;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	127 Sint16 iSamp2;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	128 } ADPCMBLOCKHEADER;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	129
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	130 typedef struct S_WAV_FMT_T
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	131 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	132 Uint32 chunkID;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	133 Sint32 chunkSize;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	134 Sint16 wFormatTag;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	135 Uint16 wChannels;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	136 Uint32 dwSamplesPerSec;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	137 Uint32 dwAvgBytesPerSec;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	138 Uint16 wBlockAlign;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	139 Uint16 wBitsPerSample;
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	140
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	141 Uint32 sample_frame_size;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	142
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	143 void (free)(struct S_WAV_FMT_T fmt);
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	144 Uint32 (read_sample)(Sound_Sample sample);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	145
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	146 union
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	147 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	148 struct
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	149 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	150 Uint16 cbSize;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	151 Uint16 wSamplesPerBlock;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	152 Uint16 wNumCoef;
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	153 ADPCMCOEFSET *aCoef;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	154 ADPCMBLOCKHEADER *blockheaders;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	155 Uint32 samples_left_in_block;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	156 int nibble_state;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	157 Sint8 nibble;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	158 } adpcm;
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	159
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	160 /* put other format-specific data here... */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	161 } fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	162 } fmt_t;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	163
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	164
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	165 /*
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	166 * Read in a fmt_t from disk. This makes this process safe regardless of
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	167 * the processor's byte order or how the fmt_t structure is packed.
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	168 * Note that the union "fmt" is not read in here; that is handled as
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	169 * needed in the read_fmt_* functions.
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	170 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	171 static int read_fmt_chunk(SDL_RWops rw, fmt_t fmt)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	172 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	173 /* skip reading the chunk ID, since it was already read at this point... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	174 fmt->chunkID = fmtID;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	175
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	176 BAIL_IF_MACRO(!read_le32(rw, &fmt->chunkSize), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	177 BAIL_IF_MACRO(!read_le16(rw, &fmt->wFormatTag), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	178 BAIL_IF_MACRO(!read_le16(rw, &fmt->wChannels), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	179 BAIL_IF_MACRO(!read_le32(rw, &fmt->dwSamplesPerSec), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	180 BAIL_IF_MACRO(!read_le32(rw, &fmt->dwAvgBytesPerSec), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	181 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBlockAlign), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	182 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBitsPerSample), NULL, 0);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	183
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	184 return(1);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	185 } /* read_fmt_chunk */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	186
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	187
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	188
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	189 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	190 * The DATA chunk... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	191 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	192
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	193 #define dataID 0x61746164 /* "data", in ascii. */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195 typedef struct
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	196 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	197 Uint32 chunkID;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	198 Sint32 chunkSize;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	199 /* Then, (chunkSize) bytes of waveform data... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	200 } data_t;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	201
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	202
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	203 /*
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	204 * Read in a data_t from disk. This makes this process safe regardless of
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	205 * the processor's byte order or how the fmt_t structure is packed.
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	206 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	207 static int read_data_chunk(SDL_RWops rw, data_t data)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	208 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	209 /* skip reading the chunk ID, since it was already read at this point... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	210 data->chunkID = dataID;
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	211 BAIL_IF_MACRO(!read_le32(rw, &data->chunkSize), NULL, 0);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	212 return(1);
40 c15396fc0e55 Fixed incorrect comment, by Torbj�rn Andersson. :) Ryan C. Gordon <icculus@icculus.org> parents: 17 diff changeset	213 } /* read_data_chunk */
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	214
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	215
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	216
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	217
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	218 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	219 * this is what we store in our internal->decoder_private field... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	220 *****************************************************************************/
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	221
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	222 typedef struct
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	223 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	224 fmt_t *fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	225 Sint32 bytesLeft;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	226 } wav_t;
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	227
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	228
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	229
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	230
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	231 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	232 * Normal, uncompressed waveform handler... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	233 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	234
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	235 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	236 * Sound_Decode() lands here for uncompressed WAVs...
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	237 */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	238 static Uint32 read_sample_fmt_normal(Sound_Sample *sample)
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	239 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	240 Uint32 retval;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	241 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	242 wav_t w = (wav_t ) internal->decoder_private;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	243 Uint32 max = (internal->buffer_size < (Uint32) w->bytesLeft) ?
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	244 internal->buffer_size : (Uint32) w->bytesLeft;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	245
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	246 assert(max > 0);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	247
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	248 /*
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	249 * We don't actually do any decoding, so we read the wav data
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	250 * directly into the internal buffer...
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	251 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	252 retval = SDL_RWread(internal->rw, internal->buffer, 1, max);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	253
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	254 w->bytesLeft -= retval;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	255
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	256 /* Make sure the read went smoothly... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	257 if ((retval == 0) \|\| (w->bytesLeft == 0))
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	258 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	259
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	260 else if (retval == -1)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	261 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	262
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	263 /* (next call this EAGAIN may turn into an EOF or error.) */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	264 else if (retval < internal->buffer_size)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	265 sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	266
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	267 return(retval);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	268 } /* read_sample_fmt_normal */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	269
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	270
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	271
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	272 static int read_fmt_normal(SDL_RWops rw, fmt_t fmt)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	273 {
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	274 /* (don't need to read more from the RWops...) */
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	275 fmt->free = NULL;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	276 fmt->read_sample = read_sample_fmt_normal;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	277 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	278 } /* read_fmt_normal */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	279
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	280
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	281
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	282 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	283 * ADPCM compression handler... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	284 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	285
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	286 #define FIXED_POINT_COEF_BASE 256
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	287 #define FIXED_POINT_ADAPTION_BASE 256
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	288 #define SMALLEST_ADPCM_DELTA 16
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	289
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	290
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	291 static inline int read_adpcm_block_headers(Sound_Sample *sample)
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	292 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	293 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	294 SDL_RWops *rw = internal->rw;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	295 wav_t w = (wav_t ) internal->decoder_private;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	296 fmt_t *fmt = w->fmt;
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	297 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	298 int i;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	299 int max = fmt->wChannels;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	300
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	301 if (w->bytesLeft < fmt->wBlockAlign)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	302 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	303 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	304 return(0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	305 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	306
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	307 w->bytesLeft -= fmt->wBlockAlign;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	308
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	309 for (i = 0; i < max; i++)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	310 BAIL_IF_MACRO(!read_uint8(rw, &headers[i].bPredictor), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	311
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	312 for (i = 0; i < max; i++)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	313 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iDelta), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	314
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	315 for (i = 0; i < max; i++)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	316 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iSamp1), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	317
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	318 for (i = 0; i < max; i++)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	319 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iSamp2), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	320
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	321 fmt->fmt.adpcm.samples_left_in_block = fmt->fmt.adpcm.wSamplesPerBlock;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	322 fmt->fmt.adpcm.nibble_state = 0;
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	323 return(1);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	324 } /* read_adpcm_block_headers */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	325
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	326
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	327 static inline void do_adpcm_nibble(Uint8 nib,
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	328 ADPCMBLOCKHEADER *header,
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	329 Sint32 lPredSamp)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	330 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	331 static const Sint32 max_audioval = ((1<<(16-1))-1);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	332 static const Sint32 min_audioval = -(1<<(16-1));
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	333 static const Sint32 AdaptionTable[] =
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	334 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	335 230, 230, 230, 230, 307, 409, 512, 614,
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	336 768, 614, 512, 409, 307, 230, 230, 230
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	337 };
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	338
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	339 Sint32 lNewSamp;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	340 Sint32 delta;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	341
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	342 if (nib & 0x08)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	343 lNewSamp = lPredSamp + (header->iDelta * (nib - 0x10));
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	344 else
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	345 lNewSamp = lPredSamp + (header->iDelta * nib);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	346
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	347 /* clamp value... */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	348 if (lNewSamp < min_audioval)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	349 lNewSamp = min_audioval;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	350 else if (lNewSamp > max_audioval)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	351 lNewSamp = max_audioval;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	352
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	353 delta = ((Sint32) header->iDelta * AdaptionTable[nib]) /
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	354 FIXED_POINT_ADAPTION_BASE;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	355
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	356 if (delta < SMALLEST_ADPCM_DELTA)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	357 delta = SMALLEST_ADPCM_DELTA;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	358
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	359 header->iDelta = delta;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	360 header->iSamp2 = header->iSamp1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	361 header->iSamp1 = lNewSamp;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	362 } /* do_adpcm_nibble */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	363
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	364
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	365 static inline int decode_adpcm_sample_frame(Sound_Sample *sample)
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	366 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	367 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	368 wav_t w = (wav_t ) internal->decoder_private;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	369 fmt_t *fmt = w->fmt;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	370 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	371 SDL_RWops *rw = internal->rw;
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	372 int i;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	373 int max = fmt->wChannels;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	374 Sint32 delta;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	375 Uint8 nib = fmt->fmt.adpcm.nibble;
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	376
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	377 for (i = 0; i < max; i++)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	378 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	379 Uint8 byte;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	380 Sint16 iCoef1 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].iCoef1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	381 Sint16 iCoef2 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].iCoef2;
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	382 Sint32 lPredSamp = ((headers[i].iSamp1 * iCoef1) +
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	383 (headers[i].iSamp2 * iCoef2)) /
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	384 FIXED_POINT_COEF_BASE;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	385
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	386 if (fmt->fmt.adpcm.nibble_state == 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	387 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	388 BAIL_IF_MACRO(!read_uint8(rw, &nib), NULL, 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	389 fmt->fmt.adpcm.nibble_state = 1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	390 do_adpcm_nibble(nib >> 4, &headers[i], lPredSamp);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	391 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	392 else
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	393 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	394 fmt->fmt.adpcm.nibble_state = 0;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	395 do_adpcm_nibble(nib & 0x0F, &headers[i], lPredSamp);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	396 } /* else */
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	397 } /* for */
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	398
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	399 fmt->fmt.adpcm.nibble = nib;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	400 return(1);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	401 } /* decode_adpcm_sample_frame */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	402
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	403
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	404 static inline void put_adpcm_sample_frame1(Uint8 _buf, fmt_t fmt)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	405 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	406 Uint16 buf = (Uint16 ) _buf;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	407 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	408 int i;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	409 for (i = 0; i < fmt->wChannels; i++)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	410 *(buf++) = headers[i].iSamp1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	411 } /* put_adpcm_sample_frame1 */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	412
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	413
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	414 static inline void put_adpcm_sample_frame2(Uint8 _buf, fmt_t fmt)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	415 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	416 Uint16 buf = (Uint16 ) _buf;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	417 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	418 int i;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	419 for (i = 0; i < fmt->wChannels; i++)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	420 *(buf++) = headers[i].iSamp2;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	421 } /* put_adpcm_sample_frame2 */
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	422
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	423
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	424 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	425 * Sound_Decode() lands here for ADPCM-encoded WAVs...
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	426 */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	427 static Uint32 read_sample_fmt_adpcm(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	428 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	429 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	430 wav_t w = (wav_t ) internal->decoder_private;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	431 fmt_t *fmt = w->fmt;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	432 Uint32 bw = 0;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	433
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	434 while (bw < internal->buffer_size)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	435 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	436 /* write ongoing sample frame before reading more data... */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	437 switch (fmt->fmt.adpcm.samples_left_in_block)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	438 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	439 case 0: /* need to read a new block... */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	440 if (!read_adpcm_block_headers(sample))
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	441 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	442 if ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	443 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	444 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	445 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	446
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	447 /* only write first sample frame for now. */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	448 put_adpcm_sample_frame2(internal->buffer + bw, fmt);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	449 fmt->fmt.adpcm.samples_left_in_block--;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	450 bw += fmt->sample_frame_size;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	451 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	452
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	453 case 1: /* output last sample frame of block... */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	454 put_adpcm_sample_frame1(internal->buffer + bw, fmt);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	455 fmt->fmt.adpcm.samples_left_in_block--;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	456 bw += fmt->sample_frame_size;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	457 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	458
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	459 default: /* output latest sample frame and read a new one... */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	460 put_adpcm_sample_frame1(internal->buffer + bw, fmt);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	461 fmt->fmt.adpcm.samples_left_in_block--;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	462 bw += fmt->sample_frame_size;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	463
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	464 if (!decode_adpcm_sample_frame(sample))
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	465 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	466 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	467 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	468 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	469 } /* switch */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	470 } /* while */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	471
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	472 return(bw);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	473 } /* read_sample_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	474
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	475
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	476 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	477 * Sound_FreeSample() lands here for ADPCM-encoded WAVs...
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	478 */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	479 static void free_fmt_adpcm(fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	480 {
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	481 if (fmt->fmt.adpcm.aCoef != NULL)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	482 free(fmt->fmt.adpcm.aCoef);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	483
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	484 if (fmt->fmt.adpcm.blockheaders != NULL)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	485 free(fmt->fmt.adpcm.blockheaders);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	486 } /* free_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	487
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	488
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	489 /*
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	490 * Read in a the adpcm-specific info from disk. This makes this process
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	491 * safe regardless of the processor's byte order or how the fmt_t
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	492 * structure is packed.
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	493 */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	494 static int read_fmt_adpcm(SDL_RWops rw, fmt_t fmt)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	495 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	496 size_t i;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	497
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	498 memset(&fmt->fmt.adpcm, '\0', sizeof (fmt->fmt.adpcm));
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	499 fmt->free = free_fmt_adpcm;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	500 fmt->read_sample = read_sample_fmt_adpcm;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	501
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	502 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.cbSize), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	503 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.wSamplesPerBlock), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	504 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.wNumCoef), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	505
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	506 /* fmt->free() is always called, so these malloc()s will be cleaned up. */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	507
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	508 i = sizeof (ADPCMCOEFSET) * fmt->fmt.adpcm.wNumCoef;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	509 fmt->fmt.adpcm.aCoef = (ADPCMCOEFSET *) malloc(i);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	510 BAIL_IF_MACRO(fmt->fmt.adpcm.aCoef == NULL, ERR_OUT_OF_MEMORY, 0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	511
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	512 for (i = 0; i < fmt->fmt.adpcm.wNumCoef; i++)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	513 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	514 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.aCoef[i].iCoef1), NULL, 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	515 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.aCoef[i].iCoef2), NULL, 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	516 } /* for */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	517
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	518 i = sizeof (ADPCMBLOCKHEADER) * fmt->wChannels;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	519 fmt->fmt.adpcm.blockheaders = (ADPCMBLOCKHEADER *) malloc(i);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	520 BAIL_IF_MACRO(fmt->fmt.adpcm.blockheaders == NULL, ERR_OUT_OF_MEMORY, 0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	521
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	522 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	523 } /* read_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	524
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	525
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	526
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	527 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	528 * Everything else... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	529 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	530
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	531 static int WAV_init(void)
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	532 {
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	533 return(1); /* always succeeds. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	534 } /* WAV_init */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	535
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	536
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	537 static void WAV_quit(void)
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	538 {
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	539 /* it's a no-op. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	540 } /* WAV_quit */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	541
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	542
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	543 static int read_fmt(SDL_RWops rw, fmt_t fmt)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	544 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	545 /* if it's in this switch statement, we support the format. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	546 switch (fmt->wFormatTag)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	547 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	548 case FMT_NORMAL:
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	549 SNDDBG(("WAV: Appears to be uncompressed audio.\n"));
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	550 return(read_fmt_normal(rw, fmt));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	551
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	552 case FMT_ADPCM:
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	553 SNDDBG(("WAV: Appears to be ADPCM compressed audio.\n"));
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	554 return(read_fmt_adpcm(rw, fmt));
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	555
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	556 /* add other types here. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	557
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	558 default:
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	559 SNDDBG(("WAV: Format %lu is unknown.\n",
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	560 (unsigned int) fmt->wFormatTag));
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	561 Sound_SetError("WAV: Unsupported format");
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	562 return(0); /* not supported whatsoever. */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	563 } /* switch */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	564
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	565 assert(0); /* shouldn't hit this point. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	566 return(0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	567 } /* read_fmt */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	568
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	569
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	570 /*
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	571 * Locate a specific chunk in the WAVE file by ID...
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	572 */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	573 static int find_chunk(SDL_RWops *rw, Uint32 id)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	574 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	575 Sint32 siz = 0;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	576 Uint32 _id = 0;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	577 Uint32 pos = SDL_RWtell(rw);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	578
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	579 while (1)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	580 {
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	581 BAIL_IF_MACRO(!read_le32(rw, &_id), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	582 if (_id == id)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	583 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	584
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	585 /* skip ahead and see what next chunk is... */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	586 BAIL_IF_MACRO(!read_le32(rw, &siz), NULL, 0);
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	587 assert(siz >= 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	588 pos += (sizeof (Uint32) * 2) + siz;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	589 if (siz > 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	590 BAIL_IF_MACRO(SDL_RWseek(rw, pos, SEEK_SET) != pos, NULL, 0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	591 } /* while */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	592
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	593 return(0); /* shouldn't hit this, but just in case... */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	594 } /* find_chunk */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	595
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	596
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	597 static int WAV_open_internal(Sound_Sample sample, const char ext, fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	598 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	599 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	600 SDL_RWops *rw = internal->rw;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	601 data_t d;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	602 wav_t *w;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	603 Uint32 pos;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	604
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	605 BAIL_IF_MACRO(SDL_ReadLE32(rw) != riffID, "WAV: Not a RIFF file.", 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	606 SDL_ReadLE32(rw); /* throw the length away; we get this info later. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	607 BAIL_IF_MACRO(SDL_ReadLE32(rw) != waveID, "WAV: Not a WAVE file.", 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	608 BAIL_IF_MACRO(!find_chunk(rw, fmtID), "WAV: No format chunk.", 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	609 BAIL_IF_MACRO(!read_fmt_chunk(rw, fmt), "WAV: Can't read format chunk.", 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	610
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	611 sample->actual.channels = (Uint8) fmt->wChannels;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	612 sample->actual.rate = fmt->dwSamplesPerSec;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	613 if (fmt->wBitsPerSample == 4)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	614 sample->actual.format = AUDIO_S16SYS; /* !!! FIXME ? */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	615 else if (fmt->wBitsPerSample == 8)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	616 sample->actual.format = AUDIO_U8;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	617 else if (fmt->wBitsPerSample == 16)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	618 sample->actual.format = AUDIO_S16LSB;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	619 else
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	620 BAIL_MACRO("WAV: Unsupported sample size.", 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	621
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	622 BAIL_IF_MACRO(!read_fmt(rw, fmt), NULL, 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	623 BAIL_IF_MACRO(!find_chunk(rw, dataID), "WAV: No data chunk.", 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	624 BAIL_IF_MACRO(!read_data_chunk(rw, &d), "WAV: Can't read data chunk.", 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	625
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	626 w = (wav_t *) malloc(sizeof(wav_t));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	627 BAIL_IF_MACRO(w == NULL, ERR_OUT_OF_MEMORY, 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	628 w->fmt = fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	629 w->bytesLeft = d.chunkSize;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	630
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	631 /* !!! FIXME: Move this to Sound_SampleInfo ? */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	632 fmt->sample_frame_size = ( ((sample->actual.format & 0xFF) / 8) *
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	633 sample->actual.channels );
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	634
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	635 internal->decoder_private = (void *) w;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	636
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	637 sample->flags = SOUND_SAMPLEFLAG_NONE;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	638
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	639 SNDDBG(("WAV: Accepting data stream.\n"));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	640 return(1); /* we'll handle this data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	641 } /* WAV_open_internal */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	642
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	643
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	644 static int WAV_open(Sound_Sample sample, const char ext)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	645 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	646 int rc;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	647
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	648 fmt_t fmt = (fmt_t ) malloc(sizeof (fmt_t));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	649 BAIL_IF_MACRO(fmt == NULL, ERR_OUT_OF_MEMORY, 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	650 memset(fmt, '\0', sizeof (fmt_t));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	651
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	652 rc = WAV_open_internal(sample, ext, fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	653 if (!rc)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	654 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	655 if (fmt->free != NULL)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	656 fmt->free(fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	657 free(fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	658 } /* if */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	659
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	660 return(rc);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	661 } /* WAV_open */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	662
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	663
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	664 static void WAV_close(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	665 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	666 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	667 wav_t w = (wav_t ) internal->decoder_private;
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	668
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	669 if (w->fmt->free != NULL)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	670 w->fmt->free(w->fmt);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	671
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	672 free(w->fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	673 free(w);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	674 } /* WAV_close */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	675
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	676
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	677 static Uint32 WAV_read(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	678 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	679 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	680 wav_t w = (wav_t ) internal->decoder_private;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	681 return(w->fmt->read_sample(sample));
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	682 } /* WAV_read */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	683
64 40006625142a Changes in preparation of autoconf support. Ryan C. Gordon <icculus@icculus.org> parents: 62 diff changeset	684 #endif /* SOUND_SUPPORTS_WAV */
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	685
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	686 /* end of wav.c ... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	687

Mercurial > SDL_sound_CoreAudio

annotate decoders/wav.c @ 191:fbb6101ea4b4