SDL_sound_CoreAudio: decoders/wav.c annotate

annotate decoders/wav.c @ 523:3a3807dcf57f

Minor tutorial.txt update.

author	Ryan C. Gordon <icculus@icculus.org>
date	Mon, 06 Aug 2007 09:40:31 +0000
parents	3e705c9180e5
children	2df1f5c62d38

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
106 40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	41 #include "SDL_sound.h"
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	42
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	43 #define __SDL_SOUND_INTERNAL__
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	44 #include "SDL_sound_internal.h"
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	45
47 ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 40 diff changeset	46 static int WAV_init(void);
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 40 diff changeset	47 static void WAV_quit(void);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	48 static int WAV_open(Sound_Sample sample, const char ext);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	49 static void WAV_close(Sound_Sample *sample);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	50 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	51 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	52 static int WAV_seek(Sound_Sample *sample, Uint32 ms);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	53
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 124 diff changeset	54 static const char *extensions_wav[] = { "WAV", NULL };
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	55 const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV =
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	56 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	57 {
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 124 diff changeset	58 extensions_wav,
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	59 "Microsoft WAVE audio format",
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	60 "Ryan C. Gordon <icculus@clutteredmind.org>",
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	61 "http://www.icculus.org/SDL_sound/"
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	62 },
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	63
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	64 WAV_init, /* init() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	65 WAV_quit, /* quit() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	66 WAV_open, /* open() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	67 WAV_close, /* close() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	68 WAV_read, /* read() method */
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	69 WAV_rewind, /* rewind() method */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	70 WAV_seek /* seek() method */
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	71 };
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	72
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	73
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	74 /* Better than SDL_ReadLE16, since you can detect i/o errors... */
401 c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	75 static __inline__ int read_le16(SDL_RWops rw, Uint16 ui16)
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	76 {
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 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	78 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	79 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	80 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	81 } /* 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	82
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 /* Better than SDL_ReadLE32, since you can detect i/o errors... */
401 c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	85 static __inline__ int read_le32(SDL_RWops rw, Uint32 ui32)
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	86 {
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 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	88 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	89 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	90 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	91 } /* 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	92
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 /* This is just cleaner on the caller's end... */
401 c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	95 static __inline__ int read_uint8(SDL_RWops rw, Uint8 ui8)
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	96 {
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 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	98 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	99 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	100 } /* 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	101
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
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	103 /* Chunk management code... */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	104
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	105 #define riffID 0x46464952 /* "RIFF", in ascii. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	106 #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	107 #define factID 0x74636166 /* "fact", in ascii. */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	108
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	109
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	110 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	111 * The FORMAT chunk... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	112 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	113
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	114 #define fmtID 0x20746D66 /* "fmt ", in ascii. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	115
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	116 #define FMT_NORMAL 0x0001 /* Uncompressed waveform data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	117 #define FMT_ADPCM 0x0002 /* ADPCM compressed waveform data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	118
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	119 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	120 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	121 Sint16 iCoef1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	122 Sint16 iCoef2;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	123 } ADPCMCOEFSET;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	124
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	125 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	126 {
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 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	128 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	129 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	130 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	131 } 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	132
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	133 typedef struct S_WAV_FMT_T
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	134 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	135 Uint32 chunkID;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	136 Sint32 chunkSize;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	137 Sint16 wFormatTag;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	138 Uint16 wChannels;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	139 Uint32 dwSamplesPerSec;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	140 Uint32 dwAvgBytesPerSec;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	141 Uint16 wBlockAlign;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	142 Uint16 wBitsPerSample;
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	143
364 4bcbc442d145 Fix to handle strange WAV fmt chunks. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	144 Uint32 next_chunk_offset;
4bcbc442d145 Fix to handle strange WAV fmt chunks. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	145
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	146 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	147 Uint32 data_starting_offset;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	148 Uint32 total_bytes;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	149
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	150 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	151 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	152 int (rewind_sample)(Sound_Sample sample);
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	153 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	154
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	155 union
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	156 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	157 struct
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	158 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	159 Uint16 cbSize;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	160 Uint16 wSamplesPerBlock;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	161 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	162 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	163 ADPCMBLOCKHEADER *blockheaders;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	164 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	165 int nibble_state;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	166 Sint8 nibble;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	167 } adpcm;
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	168
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	169 /* put other format-specific data here... */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	170 } fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	171 } fmt_t;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	172
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	173
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	174 /*
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	175 * 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	176 * 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	177 * 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	178 * needed in the read_fmt_* functions.
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	179 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	180 static int read_fmt_chunk(SDL_RWops rw, fmt_t fmt)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	181 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	182 /* 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	183 fmt->chunkID = fmtID;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	184
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	185 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	186 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	187 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	188
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	189 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	190 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	191 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	192 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	193 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	194 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBitsPerSample), NULL, 0);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	196 return(1);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	197 } /* read_fmt_chunk */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	198
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	199
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	200
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 * The DATA chunk... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	203 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	204
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	205 #define dataID 0x61746164 /* "data", in ascii. */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	206
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	207 typedef struct
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	208 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	209 Uint32 chunkID;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	210 Sint32 chunkSize;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	211 /* Then, (chunkSize) bytes of waveform data... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	212 } data_t;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	213
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 /*
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	216 * 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	217 * 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	218 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	219 static int read_data_chunk(SDL_RWops rw, data_t data)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	220 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	221 /* 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	222 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	223 BAIL_IF_MACRO(!read_le32(rw, &data->chunkSize), NULL, 0);
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	224 return(1);
40 c15396fc0e55 Fixed incorrect comment, by Torbj�rn Andersson. :) Ryan C. Gordon <icculus@icculus.org> parents: 17 diff changeset	225 } /* read_data_chunk */
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	226
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
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	230 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	231 * 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	232 *****************************************************************************/
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	233
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	234 typedef struct
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	235 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	236 fmt_t *fmt;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	237 Sint32 bytesLeft;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	238 } wav_t;
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	239
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	240
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
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	243 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	244 * Normal, uncompressed waveform handler... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	245 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	246
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	247 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	248 * 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	249 */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	250 static Uint32 read_sample_fmt_normal(Sound_Sample *sample)
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	251 {
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	252 Uint32 retval;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	253 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	254 wav_t w = (wav_t ) internal->decoder_private;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	255 Uint32 max = (internal->buffer_size < (Uint32) w->bytesLeft) ?
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	256 internal->buffer_size : (Uint32) w->bytesLeft;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	257
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	258 assert(max > 0);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	259
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	260 /*
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	261 * 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	262 * directly into the internal buffer...
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	263 */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	264 retval = SDL_RWread(internal->rw, internal->buffer, 1, max);
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	265
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	266 w->bytesLeft -= retval;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	267
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	268 /* Make sure the read went smoothly... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	269 if ((retval == 0) \|\| (w->bytesLeft == 0))
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	270 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	271
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	272 else if (retval == -1)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	273 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	274
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	275 /* (next call this EAGAIN may turn into an EOF or error.) */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	276 else if (retval < internal->buffer_size)
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	277 sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	278
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	279 return(retval);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	280 } /* read_sample_fmt_normal */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	281
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	282
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	283 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	284 {
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	285 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	286 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	287 fmt_t *fmt = w->fmt;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	288 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	289 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	290 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	291 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	292 w->bytesLeft = fmt->total_bytes - offset;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	293 return(1); /* success. */
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	294 } /* seek_sample_fmt_normal */
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	295
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	296
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	297 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	298 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	299 /* no-op. */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	300 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	301 } /* rewind_sample_fmt_normal */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	302
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	303
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	304 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	305 {
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	306 /* (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	307 fmt->free = NULL;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	308 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	309 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	310 fmt->seek_sample = seek_sample_fmt_normal;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	311 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	312 } /* read_fmt_normal */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	313
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 * ADPCM compression handler... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	318 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	319
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	320 #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	321 #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	322 #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	323
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	324
401 c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	325 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	326 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	327 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	328 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	329 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	330 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	331 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	332 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	333 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	334
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	335 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	336 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	337 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	338 return(0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	339 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	340
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	341 w->bytesLeft -= fmt->wBlockAlign;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	342
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	343 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	344 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	345
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 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	347 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	348
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 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	350 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	351
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 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	353 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	354
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	355 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	356 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	357 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	358 } /* 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	359
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
401 c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	361 static __inline__ void do_adpcm_nibble(Uint8 nib,
c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	362 ADPCMBLOCKHEADER *header,
c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	363 Sint32 lPredSamp)
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	364 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	365 static 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	366 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	367 static const Sint32 AdaptionTable[] =
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	368 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	369 230, 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	370 768, 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	371 };
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 Sint32 lNewSamp;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	374 Sint32 delta;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	375
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	376 if (nib & 0x08)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	377 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	378 else
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	379 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	380
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	381 /* clamp value... */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	382 if (lNewSamp < min_audioval)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	383 lNewSamp = min_audioval;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	384 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	385 lNewSamp = max_audioval;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	386
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	387 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	388 FIXED_POINT_ADAPTION_BASE;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	389
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	390 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	391 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
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	393 header->iDelta = delta;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	394 header->iSamp2 = header->iSamp1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	395 header->iSamp1 = lNewSamp;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	396 } /* do_adpcm_nibble */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	397
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	398
401 c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	399 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	400 {
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 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	402 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	403 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	404 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	405 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	406 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	407 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	408 Sint32 delta;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	409 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	410
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 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	412 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	413 Uint8 byte;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	414 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	415 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	416 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	417 (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	418 FIXED_POINT_COEF_BASE;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	419
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	420 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	421 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	422 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	423 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	424 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	425 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	426 else
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	427 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	428 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	429 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	430 } /* 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	431 } /* for */
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	432
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	433 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	434 return(1);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	435 } /* decode_adpcm_sample_frame */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	436
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	437
401 c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	438 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	439 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	440 Uint16 buf = (Uint16 ) _buf;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	441 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	442 int i;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	443 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	444 *(buf++) = headers[i].iSamp1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	445 } /* put_adpcm_sample_frame1 */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	446
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	447
401 c42ac9ee2ce4 Fixed "inline" keyword to compile. Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	448 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	449 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	450 Uint16 buf = (Uint16 ) _buf;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	451 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	452 int i;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	453 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	454 *(buf++) = headers[i].iSamp2;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	455 } /* 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	456
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
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	458 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	459 * 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	460 */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	461 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	462 {
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	463 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	464 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	465 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	466 Uint32 bw = 0;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	467
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	468 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	469 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	470 /* 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	471 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	472 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	473 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	474 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	475 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	476 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	477 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	478 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	479 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	480
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	481 /* 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	482 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	483 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	484 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	485 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	486
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	487 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	488 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	489 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	490 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	491 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	492
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	493 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	494 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	495 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	496 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	497
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	498 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	499 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	500 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	501 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	502 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	503 } /* switch */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	504 } /* while */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	505
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	506 return(bw);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	507 } /* read_sample_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	508
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	509
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	510 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	511 * 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	512 */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	513 static void free_fmt_adpcm(fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	514 {
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	515 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	516 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	517
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 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	519 free(fmt->fmt.adpcm.blockheaders);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	520 } /* free_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	521
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	522
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	523 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	524 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	525 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	526 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	527 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	528 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	529 } /* rewind_sample_fmt_adpcm */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	530
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	531
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	532 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	533 {
333 565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	534 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	535 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	536 fmt_t *fmt = w->fmt;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	537 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	538 int origpos = SDL_RWtell(internal->rw);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	539 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	540 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	541 int skipsize = (offset / bpb) * fmt->wBlockAlign;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	542 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	543 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	544 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	545
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	546 /* 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	547 skipsize += (offset % bpb);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	548 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	549 if (!read_adpcm_block_headers(sample))
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	550 {
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	551 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	552 return(0);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	553 } /* if */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	554
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	555 /* 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	556 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	557 rc -= fmt->sample_frame_size;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	558 while (rc > 0)
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	559 {
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	560 if (!decode_adpcm_sample_frame(sample))
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	561 {
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	562 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	563 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	564 return(0);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	565 } /* if */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	566
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	567 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	568 rc -= fmt->sample_frame_size;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	569 } /* while */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	570
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	571 w->bytesLeft = fmt->total_bytes - skipsize;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	572 return(1); /* success. */
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	573 } /* seek_sample_fmt_adpcm */
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	574
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	575
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	576 /*
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	577 * 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	578 * 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	579 * structure is packed.
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	580 */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	581 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	582 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	583 size_t i;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	584
183 26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a Ryan C. Gordon <icculus@icculus.org> parents: 178 diff changeset	585 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	586 fmt->free = free_fmt_adpcm;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	587 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	588 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	589 fmt->seek_sample = seek_sample_fmt_adpcm;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	590
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	591 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	592 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	593 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	594
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	595 /* 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	596
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	597 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	598 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	599 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	600
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	601 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	602 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	603 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	604 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	605 } /* for */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	606
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	607 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	608 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	609 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	610
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	611 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	612 } /* read_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	613
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	614
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	615
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	616 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	617 * Everything else... *
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	618 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	619
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	620 static int WAV_init(void)
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	621 {
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	622 return(1); /* always succeeds. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	623 } /* WAV_init */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	624
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 static void WAV_quit(void)
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	627 {
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	628 /* it's a no-op. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	629 } /* WAV_quit */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	630
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	631
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	632 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	633 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	634 /* 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	635 switch (fmt->wFormatTag)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	636 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	637 case FMT_NORMAL:
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	638 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	639 return(read_fmt_normal(rw, fmt));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	640
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	641 case FMT_ADPCM:
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	642 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	643 return(read_fmt_adpcm(rw, fmt));
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	644
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	645 /* add other types here. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	646
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	647 default:
193 6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?) Ryan C. Gordon <icculus@icculus.org> parents: 185 diff changeset	648 SNDDBG(("WAV: Format 0x%X is unknown.\n",
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	649 (unsigned int) fmt->wFormatTag));
387 fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL_MACRO) Ryan C. Gordon <icculus@icculus.org>* parents: 377 diff changeset	650 BAIL_MACRO("WAV: Unsupported format", 0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	651 } /* switch */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	652
178 bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	653 assert(0); /* shouldn't hit this point. */
bdbe09014724 Minor tweaks and such. Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	654 return(0);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	655 } /* read_fmt */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	656
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	657
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 * 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	660 */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	661 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	662 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	663 Sint32 siz = 0;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	664 Uint32 _id = 0;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	665 Uint32 pos = SDL_RWtell(rw);
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	666
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	667 while (1)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	668 {
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	669 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	670 if (_id == id)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	671 return(1);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	672
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	673 /* 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	674 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	675 assert(siz >= 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	676 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	677 if (siz > 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	678 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	679 } /* while */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	680
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	681 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	682 } /* find_chunk */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	683
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	684
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	685 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	686 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	687 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	688 SDL_RWops *rw = internal->rw;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	689 data_t d;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	690 wav_t *w;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	691 Uint32 pos;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	692
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	693 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	694 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	695 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	696 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	697 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	698
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	699 sample->actual.channels = (Uint8) fmt->wChannels;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	700 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	701 if ((fmt->wBitsPerSample == 4) /\|\| (fmt->wBitsPerSample == 0) / )
351 069ce624d6cf FIXME cleanup. Ryan C. Gordon <icculus@icculus.org> parents: 333 diff changeset	702 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	703 else if (fmt->wBitsPerSample == 8)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	704 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	705 else if (fmt->wBitsPerSample == 16)
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	706 sample->actual.format = AUDIO_S16LSB;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	707 else
193 6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?) Ryan C. Gordon <icculus@icculus.org> parents: 185 diff changeset	708 {
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?) Ryan C. Gordon <icculus@icculus.org> parents: 185 diff changeset	709 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	710 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	711 } /* else */
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	712
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	713 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	714 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	715 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	716 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	717
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	718 w = (wav_t *) malloc(sizeof(wav_t));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	719 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	720 w->fmt = fmt;
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	721 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	722 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	723 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	724 sample->actual.channels );
474 c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 401 diff changeset	725 internal->decoder_private = (void *) w;
185 6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too... Ryan C. Gordon <icculus@icculus.org> parents: 183 diff changeset	726
477 3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration(). Ryan C. Gordon <icculus@icculus.org> parents: 474 diff changeset	727 internal->total_time = (fmt->total_bytes / fmt->dwAvgBytesPerSec) * 1000;
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration(). Ryan C. Gordon <icculus@icculus.org> parents: 474 diff changeset	728 internal->total_time += (fmt->total_bytes % fmt->dwAvgBytesPerSec)
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration(). Ryan C. Gordon <icculus@icculus.org> parents: 474 diff changeset	729 * 1000 / fmt->dwAvgBytesPerSec;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	730
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	731 sample->flags = SOUND_SAMPLEFLAG_NONE;
333 565ae12fa74e Implemented seek support for ADPCM-compressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 307 diff changeset	732 if (fmt->seek_sample != NULL)
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	733 sample->flags \|= SOUND_SAMPLEFLAG_CANSEEK;
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	734
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	735 SNDDBG(("WAV: Accepting data stream.\n"));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	736 return(1); /* we'll handle this data. */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	737 } /* WAV_open_internal */
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
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	740 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	741 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	742 int rc;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	743
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	744 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	745 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	746 memset(fmt, '\0', sizeof (fmt_t));
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	747
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	748 rc = WAV_open_internal(sample, ext, fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	749 if (!rc)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	750 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	751 if (fmt->free != NULL)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	752 fmt->free(fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	753 free(fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	754 } /* if */
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	755
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	756 return(rc);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	757 } /* WAV_open */
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
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	760 static void WAV_close(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	761 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	762 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	763 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	764
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 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	766 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	767
124 e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	768 free(w->fmt);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	769 free(w);
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	770 } /* WAV_close */
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
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	773 static Uint32 WAV_read(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	774 {
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	775 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	776 wav_t w = (wav_t ) internal->decoder_private;
e46e31fdecfd Restructured to handle multiple formats. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	777 return(w->fmt->read_sample(sample));
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	778 } /* WAV_read */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	779
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	780
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	781 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	782 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	783 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	784 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	785 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	786 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	787 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	788 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	789 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	790 } /* WAV_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 193 diff changeset	791
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	792
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	793 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	794 {
307 eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	795 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
eb7c929193dd Added seek support for uncompressed WAVs. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	796 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	797 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	798 } /* WAV_seek */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 246 diff changeset	799
64 40006625142a Changes in preparation of autoconf support. Ryan C. Gordon <icculus@icculus.org> parents: 62 diff changeset	800 #endif /* SOUND_SUPPORTS_WAV */
17 102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	801
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	802 /* end of wav.c ... */
102cf61c0816 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	803

Mercurial > SDL_sound_CoreAudio

annotate decoders/wav.c @ 523:3a3807dcf57f