SDL_sound_CoreAudio: decoders/wav.c annotate

annotate decoders/wav.c @ 183:26996236d790

Updated comments to reflect change from LICENSE to COPYING file, and put a good chunk of the ADPCM decoder in place. Does NOT work, is NOT complete, but is more than halfway there.

author	Ryan C. Gordon <icculus@icculus.org>
date	Wed, 26 Dec 2001 10:39:16 +0000
parents	bdbe09014724
children	6bb68b3bdcf1

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. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	104
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 * The FORMAT chunk... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	108 *****************************************************************************/
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 #define fmtID 0x20746D66 /* "fmt ", in ascii. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	111
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	112 #define FMT_NORMAL 0x0001 /* Uncompressed waveform data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	113 #define FMT_ADPCM 0x0002 /* ADPCM compressed waveform data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	114
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	115 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	116 {
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	117 Uint16 iCoef1;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	118 Uint16 iCoef2;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	119 } ADPCMCOEFSET;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	120
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	121 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	122 {
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 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	124 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	125 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	126 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	127 } 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	128
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	129 typedef struct S_WAV_FMT_T
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	130 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	131 Uint32 chunkID;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	132 Sint32 chunkSize;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	133 Sint16 wFormatTag;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	134 Uint16 wChannels;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	135 Uint32 dwSamplesPerSec;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	136 Uint32 dwAvgBytesPerSec;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	137 Uint16 wBlockAlign;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	138 Uint16 wBitsPerSample;
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	139
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	140 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	141 Uint32 (read_sample)(Sound_Sample sample);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	142
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	143 union
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	144 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	145 struct
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	146 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	147 Uint16 cbSize;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	148 Uint16 wSamplesPerBlock;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	149 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	150 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	151 ADPCMBLOCKHEADER *blockheaders;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	152 } adpcm;
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	153
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	154 /* put other format-specific data here... */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	155 } fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	156 } fmt_t;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	157
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	158
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	159 /*
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	160 * 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	161 * 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	162 * 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	163 * needed in the read_fmt_* functions.
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	164 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	165 static int read_fmt_chunk(SDL_RWops rw, fmt_t fmt)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	166 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	167 /* 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	168 fmt->chunkID = fmtID;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	169
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	170 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	171 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	172 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	173 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	174 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	175 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	176 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBitsPerSample), NULL, 0);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	177
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	178 return(1);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	179 } /* read_fmt_chunk */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	180
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	181
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	182
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	183 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	184 * The DATA chunk... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	185 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	186
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	187 #define dataID 0x61746164 /* "data", in ascii. */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	188
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	189 typedef struct
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	190 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	191 Uint32 chunkID;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	192 Sint32 chunkSize;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	193 /* Then, (chunkSize) bytes of waveform data... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194 } data_t;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195
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 /*
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	198 * 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	199 * 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	200 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	201 static int read_data_chunk(SDL_RWops rw, data_t data)
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 /* 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	204 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	205 BAIL_IF_MACRO(!read_le32(rw, &data->chunkSize), NULL, 0);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	206 return(1);
40 c15396fc0e55 Fixed incorrect comment, by Torbj�rn Andersson. :) Ryan C. Gordon <icculus@icculus.org> parents: 17 diff changeset	207 } /* read_data_chunk */
17 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
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	210
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	211
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	212 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	213 * 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	214 *****************************************************************************/
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	215
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	216 typedef struct
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	217 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	218 fmt_t *fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	219 Sint32 bytesLeft;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	220 } wav_t;
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	221
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	222
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	223
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	224
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	225 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	226 * Normal, uncompressed waveform handler... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	227 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	228
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	229 static Uint32 read_sample_fmt_normal(Sound_Sample *sample)
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	230 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	231 Uint32 retval;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	232 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	233 wav_t w = (wav_t ) internal->decoder_private;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	234 Uint32 max = (internal->buffer_size < (Uint32) w->bytesLeft) ?
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	235 internal->buffer_size : (Uint32) w->bytesLeft;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	236
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	237 assert(max > 0);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	238
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 * 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	241 * directly into the internal buffer...
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	242 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	243 retval = SDL_RWread(internal->rw, internal->buffer, 1, max);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	244
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	245 w->bytesLeft -= retval;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	246
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	247 /* Make sure the read went smoothly... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	248 if ((retval == 0) \|\| (w->bytesLeft == 0))
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	249 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	250
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	251 else if (retval == -1)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	252 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
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 /* (next call this EAGAIN may turn into an EOF or error.) */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	255 else if (retval < internal->buffer_size)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	256 sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	257
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	258 return(retval);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	259 } /* read_sample_fmt_normal */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	260
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	261
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	262
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	263 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	264 {
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	265 /* (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	266 fmt->free = NULL;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	267 fmt->read_sample = read_sample_fmt_normal;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	268 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	269 } /* read_fmt_normal */
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
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	273 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	274 * ADPCM compression handler... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	275 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	276
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	277 static int read_adpcm_block_headers(SDL_RWops rw, fmt_t 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	278 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	279 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	280 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	281 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	282
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	283 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	284 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	285
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	286 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	287 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	288
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	289 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	290 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	291
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 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	293 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	294
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	295 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	296 } /* 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	297
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
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 static int decode_adpcm_block(Sound_Sample *sample)
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 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	301 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	302 SDL_RWops *rw = internal->rw;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	303 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	304 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	305 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	306 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	307 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	308
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 if (!read_adpcm_block_headers(rw, 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	310 {
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 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
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 return(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	313 } /* if */
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 {
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 Uint16 iCoef1 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].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	318 Uint16 iCoef2 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].iCoef2;
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 /*
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 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	321 (headers[i].iSamp2 * iCoef2)) /
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	322 FIXED_POINT_COEF_BASE;
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 */
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 } /* for */
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 } /* decode_adpcm_block */
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
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	327
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	328 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	329 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	330 /* !!! FIXME: Write this. */
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	331 Sound_SetError("WAV: Not implemented. Soon.");
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	332 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	333 return(0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	334 } /* read_sample_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	335
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	336
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	337 static void free_fmt_adpcm(fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	338 {
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	339 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	340 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	341
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	342 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	343 free(fmt->fmt.adpcm.blockheaders);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	344 } /* free_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	345
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	346
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	347 /*
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	348 * 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	349 * 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	350 * structure is packed.
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	351 */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	352 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	353 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	354 size_t i;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	355
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	356 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	357 fmt->free = free_fmt_adpcm;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	358 fmt->read_sample = read_sample_fmt_adpcm;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	359
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	360 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	361 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	362 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	363
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	364 /*
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	365 * !!! FIXME: SDL seems nervous about this, so I'll make a debug
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 * !!! FIXME: note for the time being...
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 */
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 if (fmt->fmt.adpcm.wNumCoef != 7)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	369 {
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	370 SNDDBG(("WAV: adpcm's wNumCoef is NOT seven (it's %d)!\n",
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	371 fmt->fmt.adpcm.wNumCoef));
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	372 } /* if */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	373
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	374 /* fmt->free() is always called, so these malloc()s will be cleaned up. */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	375 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	376 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	377 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	378
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	379 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	380 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	381 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	382
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	383 for (i = 0; i < fmt->fmt.adpcm.wNumCoef; i++)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	384 {
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	385 int rc;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	386 rc = SDL_RWread(rw, &fmt->fmt.adpcm.aCoef[i].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	387 sizeof (fmt->fmt.adpcm.aCoef[i].iCoef1), 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	388 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	389
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	390 rc = SDL_RWread(rw, &fmt->fmt.adpcm.aCoef[i].iCoef2,
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	391 sizeof (fmt->fmt.adpcm.aCoef[i].iCoef2), 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	392 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	393 } /* for */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	394
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	395 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	396 } /* read_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	397
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	398
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	399
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	400 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	401 * Everything else... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	402 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	403
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	404 static int WAV_init(void)
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	405 {
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	406 return(1); /* always succeeds. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	407 } /* WAV_init */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	408
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	409
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	410 static void WAV_quit(void)
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	411 {
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	412 /* it's a no-op. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	413 } /* WAV_quit */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	414
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	415
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	416 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	417 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	418 /* 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	419 switch (fmt->wFormatTag)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	420 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	421 case FMT_NORMAL:
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	422 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	423 return(read_fmt_normal(rw, fmt));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	424
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	425 case FMT_ADPCM:
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	426 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	427 return(read_fmt_adpcm(rw, fmt));
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	428
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	429 /* add other types here. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	430
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	431 default:
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	432 SNDDBG(("WAV: Format %lu is unknown.\n",
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	433 (unsigned int) fmt->wFormatTag));
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	434 Sound_SetError("WAV: Unsupported format");
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	435 return(0); /* not supported whatsoever. */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	436 } /* switch */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	437
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	438 assert(0); /* shouldn't hit this point. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	439 return(0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	440 } /* read_fmt */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	441
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	442
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	443 /*
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	444 * 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	445 */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	446 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	447 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	448 Sint32 siz = 0;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	449 Uint32 _id = 0;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	450
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	451 while (1)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	452 {
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	453 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	454 if (_id == id)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	455 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	456
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	457 /* 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	458 BAIL_IF_MACRO(!read_le32(rw, &siz), NULL, 0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	459 assert(siz > 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	460 BAIL_IF_MACRO(SDL_RWseek(rw, siz, SEEK_SET) != siz, NULL, 0);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	461 } /* while */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	462
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	463 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	464 } /* find_chunk */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	465
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	466
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	467 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	468 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	469 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	470 SDL_RWops *rw = internal->rw;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	471 data_t d;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	472 wav_t *w;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	473
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	474 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	475 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	476 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	477 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	478 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	479
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	480 sample->actual.channels = (Uint8) fmt->wChannels;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	481 sample->actual.rate = fmt->dwSamplesPerSec;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	482 if (fmt->wBitsPerSample <= 8)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	483 sample->actual.format = AUDIO_U8;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	484 else if (fmt->wBitsPerSample <= 16)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	485 sample->actual.format = AUDIO_S16LSB;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	486 else
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	487 BAIL_MACRO("WAV: Unsupported sample size.", 0);
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 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	490 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	491 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	492
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	493 w = (wav_t *) malloc(sizeof(wav_t));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	494 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	495 w->fmt = fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	496 w->bytesLeft = d.chunkSize;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	497 internal->decoder_private = (void *) w;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	498
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	499 sample->flags = SOUND_SAMPLEFLAG_NONE;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	500
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	501 SNDDBG(("WAV: Accepting data stream.\n"));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	502 return(1); /* we'll handle this data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	503 } /* WAV_open_internal */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	504
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	505
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	506 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	507 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	508 int rc;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	509
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	510 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	511 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	512 memset(fmt, '\0', sizeof (fmt_t));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	513
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	514 rc = WAV_open_internal(sample, ext, fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	515 if (!rc)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	516 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	517 if (fmt->free != NULL)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	518 fmt->free(fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	519 free(fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	520 } /* if */
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(rc);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	523 } /* WAV_open */
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
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	526 static void WAV_close(Sound_Sample *sample)
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 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	529 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	530
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	531 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	532 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	533
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	534 free(w->fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	535 free(w);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	536 } /* WAV_close */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	537
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	538
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	539 static Uint32 WAV_read(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	540 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	541 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	542 wav_t w = (wav_t ) internal->decoder_private;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	543 return(w->fmt->read_sample(sample));
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	544 } /* WAV_read */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	545
64 40006625142a Changes in preparation of autoconf support. Ryan C. Gordon <icculus@icculus.org> parents: 62 diff changeset	546 #endif /* SOUND_SUPPORTS_WAV */
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	547
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	548 /* end of wav.c ... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	549

Mercurial > SDL_sound_CoreAudio

annotate decoders/wav.c @ 183:26996236d790