SDL_sound_CoreAudio: decoders/wav.c annotate

annotate decoders/wav.c @ 370:12023d47b716

Updated.

author	Ryan C. Gordon <icculus@icculus.org>
date	Mon, 24 Jun 2002 23:13:04 +0000
parents	4bcbc442d145
children	cbb15ecf423a

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);
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	52 static int WAV_rewind(Sound_Sample *sample);
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	53 static int WAV_seek(Sound_Sample *sample, Uint32 ms);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	54
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 124 diff changeset	55 static const char *extensions_wav[] = { "WAV", NULL };
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	56 const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV =
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	57 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	58 {
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 124 diff changeset	59 extensions_wav,
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	60 "Microsoft WAVE audio format",
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	61 "Ryan C. Gordon <icculus@clutteredmind.org>",
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	62 "http://www.icculus.org/SDL_sound/"
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	63 },
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	64
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	65 WAV_init, /* init() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	66 WAV_quit, /* quit() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	67 WAV_open, /* open() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	68 WAV_close, /* close() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	69 WAV_read, /* read() method */
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	70 WAV_rewind, /* rewind() method */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	71 WAV_seek /* seek() method */
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	72 };
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	73
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	74
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	75 /* 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	76 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	77 {
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 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	79 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	80 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	81 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	82 } /* 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	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
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 /* 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	86 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	87 {
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 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	89 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	90 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	91 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	92 } /* 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	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
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 /* 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	96 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	97 {
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 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	99 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	100 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	101 } /* 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	102
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	103
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	104 /* Chunk management code... */
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 #define riffID 0x46464952 /* "RIFF", in ascii. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	107 #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	108 #define factID 0x74636166 /* "fact", in ascii. */
124 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 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	112 * The FORMAT chunk... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	113 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	114
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	115 #define fmtID 0x20746D66 /* "fmt ", in ascii. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	116
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	117 #define FMT_NORMAL 0x0001 /* Uncompressed waveform data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	118 #define FMT_ADPCM 0x0002 /* ADPCM compressed waveform data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	119
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	120 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	121 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	122 Sint16 iCoef1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	123 Sint16 iCoef2;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	124 } ADPCMCOEFSET;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	125
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	126 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	127 {
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 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	129 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	130 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	131 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	132 } 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	133
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	134 typedef struct S_WAV_FMT_T
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	135 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	136 Uint32 chunkID;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	137 Sint32 chunkSize;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	138 Sint16 wFormatTag;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	139 Uint16 wChannels;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	140 Uint32 dwSamplesPerSec;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	141 Uint32 dwAvgBytesPerSec;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	142 Uint16 wBlockAlign;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	143 Uint16 wBitsPerSample;
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	144
364 4bcbc442d145 Fix to handle strange WAV fmt chunks. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	145 Uint32 next_chunk_offset;
4bcbc442d145 Fix to handle strange WAV fmt chunks. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	146
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	147 Uint32 sample_frame_size;
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	148 Uint32 data_starting_offset;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	149 Uint32 total_bytes;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	150
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	151 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	152 Uint32 (read_sample)(Sound_Sample sample);
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	153 int (rewind_sample)(Sound_Sample sample);
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	154 int (seek_sample)(Sound_Sample sample, Uint32 ms);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	155
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	156 union
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 struct
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	159 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	160 Uint16 cbSize;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	161 Uint16 wSamplesPerBlock;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	162 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	163 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	164 ADPCMBLOCKHEADER *blockheaders;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	165 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	166 int nibble_state;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	167 Sint8 nibble;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	168 } adpcm;
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	169
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	170 /* put other format-specific data here... */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	171 } fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	172 } fmt_t;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	173
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	174
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	175 /*
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	176 * 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	177 * 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	178 * 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	179 * needed in the read_fmt_* functions.
17 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 static int read_fmt_chunk(SDL_RWops rw, fmt_t fmt)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	182 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	183 /* 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	184 fmt->chunkID = fmtID;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	185
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	186 BAIL_IF_MACRO(!read_le32(rw, &fmt->chunkSize), NULL, 0);
364 4bcbc442d145 Fix to handle strange WAV fmt chunks. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	187 BAIL_IF_MACRO(fmt->chunkSize < 16, "WAV: Invalid chunk size", 0);
4bcbc442d145 Fix to handle strange WAV fmt chunks. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	188 fmt->next_chunk_offset = SDL_RWtell(rw) + fmt->chunkSize;
4bcbc442d145 Fix to handle strange WAV fmt chunks. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	189
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	190 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	191 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	192 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	193 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	194 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	195 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBitsPerSample), NULL, 0);
17 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 return(1);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	198 } /* read_fmt_chunk */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	199
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	200
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	201
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	202 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	203 * The DATA chunk... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	204 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	205
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	206 #define dataID 0x61746164 /* "data", in ascii. */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	207
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	208 typedef struct
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 Uint32 chunkID;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	211 Sint32 chunkSize;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	212 /* Then, (chunkSize) bytes of waveform data... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	213 } data_t;
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 /*
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	217 * 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	218 * 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	219 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	220 static int read_data_chunk(SDL_RWops rw, data_t data)
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 /* 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	223 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	224 BAIL_IF_MACRO(!read_le32(rw, &data->chunkSize), NULL, 0);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	225 return(1);
40 c15396fc0e55 Fixed incorrect comment, by Torbj�rn Andersson. :) Ryan C. Gordon <icculus@icculus.org> parents: 17 diff changeset	226 } /* read_data_chunk */
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 * 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	233 *****************************************************************************/
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	234
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	235 typedef struct
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	236 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	237 fmt_t *fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	238 Sint32 bytesLeft;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	239 } wav_t;
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	240
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	241
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
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	244 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	245 * Normal, uncompressed waveform handler... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	246 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	247
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	248 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	249 * 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	250 */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	251 static Uint32 read_sample_fmt_normal(Sound_Sample *sample)
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	252 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	253 Uint32 retval;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	254 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	255 wav_t w = (wav_t ) internal->decoder_private;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	256 Uint32 max = (internal->buffer_size < (Uint32) w->bytesLeft) ?
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	257 internal->buffer_size : (Uint32) w->bytesLeft;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	258
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	259 assert(max > 0);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	260
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	261 /*
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	262 * 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	263 * directly into the internal buffer...
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	264 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	265 retval = SDL_RWread(internal->rw, internal->buffer, 1, max);
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 w->bytesLeft -= retval;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	268
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	269 /* Make sure the read went smoothly... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	270 if ((retval == 0) \|\| (w->bytesLeft == 0))
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	271 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	272
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	273 else if (retval == -1)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	274 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	275
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	276 /* (next call this EAGAIN may turn into an EOF or error.) */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	277 else if (retval < internal->buffer_size)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	278 sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	279
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	280 return(retval);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	281 } /* read_sample_fmt_normal */
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
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	284 static int seek_sample_fmt_normal(Sound_Sample *sample, Uint32 ms)
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	285 {
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	286 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	287 wav_t w = (wav_t ) internal->decoder_private;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	288 fmt_t *fmt = w->fmt;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	289 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	290 int pos = (int) (fmt->data_starting_offset + offset);
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	291 int rc = SDL_RWseek(internal->rw, pos, SEEK_SET);
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	292 BAIL_IF_MACRO(rc != pos, ERR_IO_ERROR, 0);
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	293 w->bytesLeft = fmt->total_bytes - offset;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	294 return(1); /* success. */
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	295 } /* seek_sample_fmt_normal */
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	296
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	297
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	298 static int rewind_sample_fmt_normal(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	299 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	300 /* no-op. */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	301 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	302 } /* rewind_sample_fmt_normal */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	303
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	304
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	305 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	306 {
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	307 /* (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	308 fmt->free = NULL;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	309 fmt->read_sample = read_sample_fmt_normal;
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	310 fmt->rewind_sample = rewind_sample_fmt_normal;
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	311 fmt->seek_sample = seek_sample_fmt_normal;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	312 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	313 } /* read_fmt_normal */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	314
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	315
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	316
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	317 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	318 * ADPCM compression handler... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	319 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 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 #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	322 #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	323 #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	324
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	325
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	326 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	327 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	328 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	329 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	330 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	331 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	332 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	333 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	334 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	335
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	336 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	337 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	338 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	339 return(0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	340 } /* if */
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 w->bytesLeft -= fmt->wBlockAlign;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	343
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	344 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	345 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	346
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	347 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	348 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	349
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	350 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	351 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	352
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	353 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	354 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	355
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	356 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	357 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	358 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	359 } /* 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	360
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
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	362 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	363 ADPCMBLOCKHEADER *header,
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	364 Sint32 lPredSamp)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	365 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	366 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	367 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	368 static const Sint32 AdaptionTable[] =
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	369 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	370 230, 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	371 768, 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	372 };
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	373
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	374 Sint32 lNewSamp;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	375 Sint32 delta;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	376
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	377 if (nib & 0x08)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	378 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	379 else
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	380 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	381
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	382 /* clamp value... */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	383 if (lNewSamp < min_audioval)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	384 lNewSamp = min_audioval;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	385 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	386 lNewSamp = max_audioval;
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 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	389 FIXED_POINT_ADAPTION_BASE;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	390
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	391 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	392 delta = SMALLEST_ADPCM_DELTA;
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 header->iDelta = delta;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	395 header->iSamp2 = header->iSamp1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	396 header->iSamp1 = lNewSamp;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	397 } /* do_adpcm_nibble */
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
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	400 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	401 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	402 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	403 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	404 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	405 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	406 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	407 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	408 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	409 Sint32 delta;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	410 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	411
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	412 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	413 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	414 Uint8 byte;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	415 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	416 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	417 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	418 (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	419 FIXED_POINT_COEF_BASE;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	420
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	421 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	422 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	423 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	424 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	425 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	426 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	427 else
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	428 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	429 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	430 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	431 } /* 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	432 } /* for */
185 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 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	435 return(1);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	436 } /* decode_adpcm_sample_frame */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	437
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	438
242 12a9c2e0b00f Fixed compiler warnings (thanks, Darrell!) Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	439 static inline void put_adpcm_sample_frame1(void _buf, fmt_t fmt)
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	440 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	441 Uint16 buf = (Uint16 ) _buf;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	442 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	443 int i;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	444 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	445 *(buf++) = headers[i].iSamp1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	446 } /* put_adpcm_sample_frame1 */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	447
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	448
242 12a9c2e0b00f Fixed compiler warnings (thanks, Darrell!) Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	449 static inline void put_adpcm_sample_frame2(void _buf, fmt_t fmt)
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	450 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	451 Uint16 buf = (Uint16 ) _buf;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	452 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	453 int i;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	454 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	455 *(buf++) = headers[i].iSamp2;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	456 } /* 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	457
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
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	459 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	460 * 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	461 */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	462 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	463 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	464 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	465 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	466 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	467 Uint32 bw = 0;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	468
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	469 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	470 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	471 /* 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	472 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	473 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	474 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	475 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	476 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	477 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	478 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	479 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	480 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	481
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	482 /* only write first sample frame for now. */
246 170b1400e060 Cast to prevent pointer arithmatic on a (void ). Ryan C. Gordon <icculus@icculus.org>* parents: 242 diff changeset	483 put_adpcm_sample_frame2((Uint8 *) internal->buffer + bw, fmt);
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	484 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	485 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	486 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	487
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	488 case 1: /* output last sample frame of block... */
246 170b1400e060 Cast to prevent pointer arithmatic on a (void ). Ryan C. Gordon <icculus@icculus.org>* parents: 242 diff changeset	489 put_adpcm_sample_frame1((Uint8 *) internal->buffer + bw, fmt);
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	490 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	491 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	492 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	493
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	494 default: /* output latest sample frame and read a new one... */
246 170b1400e060 Cast to prevent pointer arithmatic on a (void ). Ryan C. Gordon <icculus@icculus.org>* parents: 242 diff changeset	495 put_adpcm_sample_frame1((Uint8 *) internal->buffer + bw, fmt);
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	496 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	497 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	498
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	499 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	500 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	501 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	502 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	503 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	504 } /* switch */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	505 } /* while */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	506
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	507 return(bw);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	508 } /* read_sample_fmt_adpcm */
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
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	511 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	512 * 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	513 */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	514 static void free_fmt_adpcm(fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	515 {
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	516 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	517 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	518
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 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	520 free(fmt->fmt.adpcm.blockheaders);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	521 } /* free_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	522
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	523
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	524 static int rewind_sample_fmt_adpcm(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	525 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	526 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	527 wav_t w = (wav_t ) internal->decoder_private;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	528 w->fmt->fmt.adpcm.samples_left_in_block = 0;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	529 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	530 } /* rewind_sample_fmt_adpcm */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	531
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	532
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	533 static int seek_sample_fmt_adpcm(Sound_Sample *sample, Uint32 ms)
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	534 {
333 565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	535 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	536 wav_t w = (wav_t ) internal->decoder_private;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	537 fmt_t *fmt = w->fmt;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	538 Uint32 origsampsleft = fmt->fmt.adpcm.samples_left_in_block;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	539 int origpos = SDL_RWtell(internal->rw);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	540 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	541 int bpb = (fmt->fmt.adpcm.wSamplesPerBlock * fmt->sample_frame_size);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	542 int skipsize = (offset / bpb) * fmt->wBlockAlign;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	543 int pos = skipsize + fmt->data_starting_offset;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	544 int rc = SDL_RWseek(internal->rw, pos, SEEK_SET);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	545 BAIL_IF_MACRO(rc != pos, ERR_IO_ERROR, 0);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	546
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	547 /* The offset we need is in this block, so we need to decode to there. */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	548 skipsize += (offset % bpb);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	549 rc = (offset % bpb); /* bytes into this block we need to decode */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	550 if (!read_adpcm_block_headers(sample))
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	551 {
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	552 SDL_RWseek(internal->rw, origpos, SEEK_SET); /* try to make sane. */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	553 return(0);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	554 } /* if */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	555
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	556 /* first sample frame of block is a freebie. :) */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	557 fmt->fmt.adpcm.samples_left_in_block--;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	558 rc -= fmt->sample_frame_size;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	559 while (rc > 0)
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	560 {
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	561 if (!decode_adpcm_sample_frame(sample))
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	562 {
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	563 SDL_RWseek(internal->rw, origpos, SEEK_SET);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	564 fmt->fmt.adpcm.samples_left_in_block = origsampsleft;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	565 return(0);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	566 } /* if */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	567
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	568 fmt->fmt.adpcm.samples_left_in_block--;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	569 rc -= fmt->sample_frame_size;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	570 } /* while */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	571
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	572 w->bytesLeft = fmt->total_bytes - skipsize;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	573 return(1); /* success. */
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	574 } /* seek_sample_fmt_adpcm */
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	575
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	576
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	577 /*
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	578 * Read in the adpcm-specific info from disk. This makes this process
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	579 * 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	580 * structure is packed.
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	581 */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	582 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	583 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	584 size_t i;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	585
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	586 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	587 fmt->free = free_fmt_adpcm;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	588 fmt->read_sample = read_sample_fmt_adpcm;
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	589 fmt->rewind_sample = rewind_sample_fmt_adpcm;
333 565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	590 fmt->seek_sample = seek_sample_fmt_adpcm;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	591
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	592 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	593 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	594 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	595
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	596 /* 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	597
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	598 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	599 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	600 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	601
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	602 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	603 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	604 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	605 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	606 } /* for */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	607
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	608 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	609 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	610 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	611
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	612 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	613 } /* read_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	614
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	615
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	616
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	617 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	618 * Everything else... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	619 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	620
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	621 static int WAV_init(void)
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	622 {
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	623 return(1); /* always succeeds. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	624 } /* WAV_init */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	625
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	626
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	627 static void WAV_quit(void)
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	628 {
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	629 /* it's a no-op. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	630 } /* WAV_quit */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	631
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	632
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	633 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	634 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	635 /* 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	636 switch (fmt->wFormatTag)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	637 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	638 case FMT_NORMAL:
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	639 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	640 return(read_fmt_normal(rw, fmt));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	641
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	642 case FMT_ADPCM:
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	643 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	644 return(read_fmt_adpcm(rw, fmt));
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	645
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	646 /* add other types here. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	647
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	648 default:
193 6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?) Ryan C. Gordon <icculus@icculus.org> parents: 185 diff changeset	649 SNDDBG(("WAV: Format 0x%X is unknown.\n",
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	650 (unsigned int) fmt->wFormatTag));
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	651 Sound_SetError("WAV: Unsupported format");
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	652 return(0); /* not supported whatsoever. */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	653 } /* switch */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	654
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	655 assert(0); /* shouldn't hit this point. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	656 return(0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	657 } /* read_fmt */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	658
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 /*
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	661 * 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	662 */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	663 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	664 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	665 Sint32 siz = 0;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	666 Uint32 _id = 0;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	667 Uint32 pos = SDL_RWtell(rw);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	668
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	669 while (1)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	670 {
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	671 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	672 if (_id == id)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	673 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	674
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	675 /* 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	676 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	677 assert(siz >= 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	678 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	679 if (siz > 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	680 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	681 } /* while */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	682
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	683 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	684 } /* find_chunk */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	685
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	686
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	687 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	688 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	689 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	690 SDL_RWops *rw = internal->rw;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	691 data_t d;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	692 wav_t *w;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	693 Uint32 pos;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	694
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	695 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	696 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	697 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	698 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	699 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	700
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	701 sample->actual.channels = (Uint8) fmt->wChannels;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	702 sample->actual.rate = fmt->dwSamplesPerSec;
193 6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?) Ryan C. Gordon <icculus@icculus.org> parents: 185 diff changeset	703 if ((fmt->wBitsPerSample == 4) /\|\| (fmt->wBitsPerSample == 0) / )
351 069ce624d6cf FIXME cleanup. Ryan C. Gordon <icculus@icculus.org> parents: 333 diff changeset	704 sample->actual.format = AUDIO_S16SYS;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	705 else if (fmt->wBitsPerSample == 8)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	706 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	707 else if (fmt->wBitsPerSample == 16)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	708 sample->actual.format = AUDIO_S16LSB;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	709 else
193 6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?) Ryan C. Gordon <icculus@icculus.org> parents: 185 diff changeset	710 {
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?) Ryan C. Gordon <icculus@icculus.org> parents: 185 diff changeset	711 SNDDBG(("WAV: %d bits per sample!?\n", (int) fmt->wBitsPerSample));
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	712 BAIL_MACRO("WAV: Unsupported sample size.", 0);
193 6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?) Ryan C. Gordon <icculus@icculus.org> parents: 185 diff changeset	713 } /* else */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	714
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	715 BAIL_IF_MACRO(!read_fmt(rw, fmt), NULL, 0);
364 4bcbc442d145 Fix to handle strange WAV fmt chunks. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	716 SDL_RWseek(rw, fmt->next_chunk_offset, SEEK_SET);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	717 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	718 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	719
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	720 w = (wav_t *) malloc(sizeof(wav_t));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	721 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	722 w->fmt = fmt;
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	723 fmt->total_bytes = w->bytesLeft = d.chunkSize;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	724 fmt->data_starting_offset = SDL_RWtell(rw);
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	725 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	726 sample->actual.channels );
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	727
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	728 internal->decoder_private = (void *) w;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	729
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	730 sample->flags = SOUND_SAMPLEFLAG_NONE;
333 565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	731 if (fmt->seek_sample != NULL)
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	732 sample->flags \|= SOUND_SAMPLEFLAG_CANSEEK;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	733
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	734 SNDDBG(("WAV: Accepting data stream.\n"));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	735 return(1); /* we'll handle this data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	736 } /* WAV_open_internal */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	737
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	738
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	739 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	740 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	741 int rc;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	742
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	743 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	744 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	745 memset(fmt, '\0', sizeof (fmt_t));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	746
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	747 rc = WAV_open_internal(sample, ext, fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	748 if (!rc)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	749 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	750 if (fmt->free != NULL)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	751 fmt->free(fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	752 free(fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	753 } /* if */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	754
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	755 return(rc);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	756 } /* WAV_open */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	757
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	758
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	759 static void WAV_close(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	760 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	761 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	762 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	763
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	764 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	765 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	766
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	767 free(w->fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	768 free(w);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	769 } /* WAV_close */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	770
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	771
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	772 static Uint32 WAV_read(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	773 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	774 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	775 wav_t w = (wav_t ) internal->decoder_private;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	776 return(w->fmt->read_sample(sample));
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	777 } /* WAV_read */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	778
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	779
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	780 static int WAV_rewind(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	781 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	782 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	783 wav_t w = (wav_t ) internal->decoder_private;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	784 fmt_t *fmt = w->fmt;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	785 int rc = SDL_RWseek(internal->rw, fmt->data_starting_offset, SEEK_SET);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	786 BAIL_IF_MACRO(rc != fmt->data_starting_offset, ERR_IO_ERROR, 0);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	787 w->bytesLeft = fmt->total_bytes;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	788 return(fmt->rewind_sample(sample));
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	789 } /* WAV_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	790
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	791
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	792 static int WAV_seek(Sound_Sample *sample, Uint32 ms)
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	793 {
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	794 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	795 wav_t w = (wav_t ) internal->decoder_private;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	796 return(w->fmt->seek_sample(sample, ms));
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	797 } /* WAV_seek */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	798
64 40006625142a Changes in preparation of autoconf support. Ryan C. Gordon <icculus@icculus.org> parents: 62 diff changeset	799 #endif /* SOUND_SUPPORTS_WAV */
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	800
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	801 /* end of wav.c ... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	802

Mercurial > SDL_sound_CoreAudio

annotate decoders/wav.c @ 370:12023d47b716