annotate decoders/wav.c @ 307:eb7c929193dd

Added seek support for uncompressed WAVs.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 21 Apr 2002 21:34:59 +0000
parents c97be6e1bd27
children 565ae12fa74e
rev   line source
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1 /*
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2 * SDL_sound -- An abstract sound format decoding API.
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3 * Copyright (C) 2001 Ryan C. Gordon.
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4 *
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5 * This library is free software; you can redistribute it and/or
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6 * modify it under the terms of the GNU Lesser General Public
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7 * License as published by the Free Software Foundation; either
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8 * version 2.1 of the License, or (at your option) any later version.
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9 *
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10 * This library is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Lesser General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Lesser General Public
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16 * License along with this library; if not, write to the Free Software
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17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 */
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19
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20 /*
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21 * WAV decoder for SDL_sound.
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22 *
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23 * This driver handles Microsoft .WAVs, in as many of the thousands of
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24 * variations as we can.
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25 *
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26 * Please see the file COPYING in the source's root directory.
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27 *
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28 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org)
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29 */
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30
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31 #if HAVE_CONFIG_H
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32 # include <config.h>
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33 #endif
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34
104
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35 #ifdef SOUND_SUPPORTS_WAV
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36
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37 #include <stdio.h>
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38 #include <stdlib.h>
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39 #include <string.h>
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40 #include <assert.h>
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41
106
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42 #include "SDL_sound.h"
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43
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44 #define __SDL_SOUND_INTERNAL__
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45 #include "SDL_sound_internal.h"
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46
47
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47 static int WAV_init(void);
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48 static void WAV_quit(void);
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49 static int WAV_open(Sound_Sample *sample, const char *ext);
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50 static void WAV_close(Sound_Sample *sample);
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51 static Uint32 WAV_read(Sound_Sample *sample);
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52 static int WAV_rewind(Sound_Sample *sample);
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53 static int WAV_seek(Sound_Sample *sample, Uint32 ms);
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54
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55 static const char *extensions_wav[] = { "WAV", NULL };
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56 const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV =
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57 {
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58 {
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59 extensions_wav,
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60 "Microsoft WAVE audio format",
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61 "Ryan C. Gordon <icculus@clutteredmind.org>",
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62 "http://www.icculus.org/SDL_sound/"
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63 },
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64
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65 WAV_init, /* init() method */
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66 WAV_quit, /* quit() method */
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67 WAV_open, /* open() method */
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68 WAV_close, /* close() method */
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69 WAV_read, /* read() method */
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70 WAV_rewind, /* rewind() method */
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71 WAV_seek /* seek() method */
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72 };
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183
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75 /* Better than SDL_ReadLE16, since you can detect i/o errors... */
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76 static inline int read_le16(SDL_RWops *rw, Uint16 *ui16)
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77 {
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78 int rc = SDL_RWread(rw, ui16, sizeof (Uint16), 1);
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79 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
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80 *ui16 = SDL_SwapLE16(*ui16);
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81 return(1);
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82 } /* read_le16 */
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83
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84
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85 /* Better than SDL_ReadLE32, since you can detect i/o errors... */
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86 static inline int read_le32(SDL_RWops *rw, Uint32 *ui32)
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87 {
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88 int rc = SDL_RWread(rw, ui32, sizeof (Uint32), 1);
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89 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
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90 *ui32 = SDL_SwapLE32(*ui32);
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91 return(1);
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92 } /* read_le32 */
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93
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94
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95 /* This is just cleaner on the caller's end... */
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96 static inline int read_uint8(SDL_RWops *rw, Uint8 *ui8)
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97 {
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98 int rc = SDL_RWread(rw, ui8, sizeof (Uint8), 1);
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99 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
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100 return(1);
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101 } /* read_uint8 */
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102
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103
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104 /* Chunk management code... */
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105
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106 #define riffID 0x46464952 /* "RIFF", in ascii. */
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107 #define waveID 0x45564157 /* "WAVE", in ascii. */
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108 #define factID 0x74636166 /* "fact", in ascii. */
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109
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110
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111 /*****************************************************************************
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112 * The FORMAT chunk... *
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113 *****************************************************************************/
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114
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115 #define fmtID 0x20746D66 /* "fmt ", in ascii. */
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116
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117 #define FMT_NORMAL 0x0001 /* Uncompressed waveform data. */
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118 #define FMT_ADPCM 0x0002 /* ADPCM compressed waveform data. */
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119
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120 typedef struct
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121 {
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122 Sint16 iCoef1;
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123 Sint16 iCoef2;
124
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124 } ADPCMCOEFSET;
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125
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126 typedef struct
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127 {
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128 Uint8 bPredictor;
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129 Uint16 iDelta;
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130 Sint16 iSamp1;
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131 Sint16 iSamp2;
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132 } ADPCMBLOCKHEADER;
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133
178
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134 typedef struct S_WAV_FMT_T
124
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135 {
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136 Uint32 chunkID;
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137 Sint32 chunkSize;
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138 Sint16 wFormatTag;
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139 Uint16 wChannels;
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140 Uint32 dwSamplesPerSec;
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141 Uint32 dwAvgBytesPerSec;
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142 Uint16 wBlockAlign;
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143 Uint16 wBitsPerSample;
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144
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145 Uint32 sample_frame_size;
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146 Uint32 data_starting_offset;
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147 Uint32 total_bytes;
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148
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149 void (*free)(struct S_WAV_FMT_T *fmt);
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150 Uint32 (*read_sample)(Sound_Sample *sample);
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diff changeset
151 int (*rewind_sample)(Sound_Sample *sample);
307
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diff changeset
152 int (*seek_sample)(Sound_Sample *sample, Uint32 ms);
124
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153
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diff changeset
154 union
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diff changeset
155 {
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parents: 106
diff changeset
156 struct
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parents: 106
diff changeset
157 {
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diff changeset
158 Uint16 cbSize;
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diff changeset
159 Uint16 wSamplesPerBlock;
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parents: 106
diff changeset
160 Uint16 wNumCoef;
183
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diff changeset
161 ADPCMCOEFSET *aCoef;
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diff changeset
162 ADPCMBLOCKHEADER *blockheaders;
185
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diff changeset
163 Uint32 samples_left_in_block;
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parents: 183
diff changeset
164 int nibble_state;
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diff changeset
165 Sint8 nibble;
124
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166 } adpcm;
178
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diff changeset
167
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diff changeset
168 /* put other format-specific data here... */
124
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169 } fmt;
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170 } fmt_t;
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diff changeset
171
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diff changeset
172
17
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173 /*
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174 * Read in a fmt_t from disk. This makes this process safe regardless of
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175 * the processor's byte order or how the fmt_t structure is packed.
124
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176 * Note that the union "fmt" is not read in here; that is handled as
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diff changeset
177 * needed in the read_fmt_* functions.
17
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178 */
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179 static int read_fmt_chunk(SDL_RWops *rw, fmt_t *fmt)
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Ryan C. Gordon <icculus@icculus.org>
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180 {
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Ryan C. Gordon <icculus@icculus.org>
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181 /* skip reading the chunk ID, since it was already read at this point... */
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182 fmt->chunkID = fmtID;
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183
183
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184 BAIL_IF_MACRO(!read_le32(rw, &fmt->chunkSize), NULL, 0);
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185 BAIL_IF_MACRO(!read_le16(rw, &fmt->wFormatTag), NULL, 0);
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186 BAIL_IF_MACRO(!read_le16(rw, &fmt->wChannels), NULL, 0);
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187 BAIL_IF_MACRO(!read_le32(rw, &fmt->dwSamplesPerSec), NULL, 0);
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188 BAIL_IF_MACRO(!read_le32(rw, &fmt->dwAvgBytesPerSec), NULL, 0);
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diff changeset
189 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBlockAlign), NULL, 0);
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parents: 178
diff changeset
190 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBitsPerSample), NULL, 0);
17
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191
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192 return(1);
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193 } /* read_fmt_chunk */
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194
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195
124
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diff changeset
196
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197 /*****************************************************************************
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198 * The DATA chunk... *
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199 *****************************************************************************/
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200
17
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201 #define dataID 0x61746164 /* "data", in ascii. */
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202
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203 typedef struct
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204 {
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205 Uint32 chunkID;
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
206 Sint32 chunkSize;
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Ryan C. Gordon <icculus@icculus.org>
parents:
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207 /* Then, (chunkSize) bytes of waveform data... */
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Ryan C. Gordon <icculus@icculus.org>
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208 } data_t;
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209
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210
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Ryan C. Gordon <icculus@icculus.org>
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211 /*
124
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212 * Read in a data_t from disk. This makes this process safe regardless of
17
102cf61c0816 Initial add.
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213 * the processor's byte order or how the fmt_t structure is packed.
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214 */
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215 static int read_data_chunk(SDL_RWops *rw, data_t *data)
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Ryan C. Gordon <icculus@icculus.org>
parents:
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216 {
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parents:
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217 /* skip reading the chunk ID, since it was already read at this point... */
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218 data->chunkID = dataID;
183
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diff changeset
219 BAIL_IF_MACRO(!read_le32(rw, &data->chunkSize), NULL, 0);
17
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220 return(1);
40
c15396fc0e55 Fixed incorrect comment, by Torbj�rn Andersson. :)
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diff changeset
221 } /* read_data_chunk */
17
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222
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223
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224
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225
124
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226 /*****************************************************************************
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diff changeset
227 * this is what we store in our internal->decoder_private field... *
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diff changeset
228 *****************************************************************************/
17
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229
124
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diff changeset
230 typedef struct
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diff changeset
231 {
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diff changeset
232 fmt_t *fmt;
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diff changeset
233 Sint32 bytesLeft;
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diff changeset
234 } wav_t;
17
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235
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236
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237
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238
124
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diff changeset
239 /*****************************************************************************
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diff changeset
240 * Normal, uncompressed waveform handler... *
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diff changeset
241 *****************************************************************************/
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diff changeset
242
185
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diff changeset
243 /*
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parents: 183
diff changeset
244 * Sound_Decode() lands here for uncompressed WAVs...
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parents: 183
diff changeset
245 */
124
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diff changeset
246 static Uint32 read_sample_fmt_normal(Sound_Sample *sample)
17
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247 {
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248 Uint32 retval;
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parents:
diff changeset
249 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
250 wav_t *w = (wav_t *) internal->decoder_private;
102cf61c0816 Initial add.
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parents:
diff changeset
251 Uint32 max = (internal->buffer_size < (Uint32) w->bytesLeft) ?
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
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252 internal->buffer_size : (Uint32) w->bytesLeft;
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253
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254 assert(max > 0);
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parents:
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255
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
256 /*
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parents:
diff changeset
257 * 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
258 * directly into the internal buffer...
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
259 */
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diff changeset
260 retval = SDL_RWread(internal->rw, internal->buffer, 1, max);
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diff changeset
261
102cf61c0816 Initial add.
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diff changeset
262 w->bytesLeft -= retval;
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parents:
diff changeset
263
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 /* Make sure the read went smoothly... */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 if ((retval == 0) || (w->bytesLeft == 0))
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parents:
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266 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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parents:
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267
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
268 else if (retval == -1)
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
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Ryan C. Gordon <icculus@icculus.org>
parents:
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270
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 /* (next call this EAGAIN may turn into an EOF or error.) */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
272 else if (retval < internal->buffer_size)
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
273 sample->flags |= SOUND_SAMPLEFLAG_EAGAIN;
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parents:
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274
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diff changeset
275 return(retval);
124
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diff changeset
276 } /* read_sample_fmt_normal */
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diff changeset
277
e46e31fdecfd Restructured to handle multiple formats.
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diff changeset
278
307
eb7c929193dd Added seek support for uncompressed WAVs.
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diff changeset
279 static int seek_sample_fmt_normal(Sound_Sample *sample, Uint32 ms)
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diff changeset
280 {
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diff changeset
281 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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diff changeset
282 wav_t *w = (wav_t *) internal->decoder_private;
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diff changeset
283 fmt_t *fmt = w->fmt;
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diff changeset
284 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
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diff changeset
285 int pos = (int) (fmt->data_starting_offset + offset);
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parents: 306
diff changeset
286 int rc = SDL_RWseek(internal->rw, pos, SEEK_SET);
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diff changeset
287 BAIL_IF_MACRO(rc != pos, ERR_IO_ERROR, 0);
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diff changeset
288 w->bytesLeft = fmt->total_bytes - offset;
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diff changeset
289 return(1); /* success. */
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parents: 306
diff changeset
290 } /* seek_sample_fmt_normal */
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diff changeset
291
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
292
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
293 static int rewind_sample_fmt_normal(Sound_Sample *sample)
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diff changeset
294 {
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diff changeset
295 /* no-op. */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
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diff changeset
296 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
297 } /* rewind_sample_fmt_normal */
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diff changeset
298
124
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diff changeset
299
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parents: 106
diff changeset
300 static int read_fmt_normal(SDL_RWops *rw, fmt_t *fmt)
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diff changeset
301 {
178
bdbe09014724 Minor tweaks and such.
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diff changeset
302 /* (don't need to read more from the RWops...) */
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
303 fmt->free = NULL;
124
e46e31fdecfd Restructured to handle multiple formats.
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diff changeset
304 fmt->read_sample = read_sample_fmt_normal;
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
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parents: 193
diff changeset
305 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
306 fmt->seek_sample = seek_sample_fmt_normal;
124
e46e31fdecfd Restructured to handle multiple formats.
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parents: 106
diff changeset
307 return(1);
e46e31fdecfd Restructured to handle multiple formats.
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diff changeset
308 } /* read_fmt_normal */
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309
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diff changeset
310
e46e31fdecfd Restructured to handle multiple formats.
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311
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312 /*****************************************************************************
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313 * ADPCM compression handler... *
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314 *****************************************************************************/
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315
185
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316 #define FIXED_POINT_COEF_BASE 256
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317 #define FIXED_POINT_ADAPTION_BASE 256
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318 #define SMALLEST_ADPCM_DELTA 16
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319
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320
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321 static inline int read_adpcm_block_headers(Sound_Sample *sample)
183
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322 {
185
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323 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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324 SDL_RWops *rw = internal->rw;
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325 wav_t *w = (wav_t *) internal->decoder_private;
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326 fmt_t *fmt = w->fmt;
183
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327 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
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328 int i;
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329 int max = fmt->wChannels;
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330
185
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331 if (w->bytesLeft < fmt->wBlockAlign)
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332 {
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333 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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334 return(0);
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335 } /* if */
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336
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337 w->bytesLeft -= fmt->wBlockAlign;
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338
183
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339 for (i = 0; i < max; i++)
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340 BAIL_IF_MACRO(!read_uint8(rw, &headers[i].bPredictor), NULL, 0);
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341
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342 for (i = 0; i < max; i++)
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343 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iDelta), NULL, 0);
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344
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345 for (i = 0; i < max; i++)
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346 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iSamp1), NULL, 0);
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diff changeset
347
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diff changeset
348 for (i = 0; i < max; i++)
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diff changeset
349 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iSamp2), NULL, 0);
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350
185
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351 fmt->fmt.adpcm.samples_left_in_block = fmt->fmt.adpcm.wSamplesPerBlock;
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diff changeset
352 fmt->fmt.adpcm.nibble_state = 0;
183
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353 return(1);
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diff changeset
354 } /* read_adpcm_block_headers */
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355
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356
185
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diff changeset
357 static inline void do_adpcm_nibble(Uint8 nib,
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358 ADPCMBLOCKHEADER *header,
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359 Sint32 lPredSamp)
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360 {
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361 static const Sint32 max_audioval = ((1<<(16-1))-1);
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362 static const Sint32 min_audioval = -(1<<(16-1));
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363 static const Sint32 AdaptionTable[] =
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364 {
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365 230, 230, 230, 230, 307, 409, 512, 614,
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366 768, 614, 512, 409, 307, 230, 230, 230
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367 };
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368
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diff changeset
369 Sint32 lNewSamp;
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370 Sint32 delta;
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diff changeset
371
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diff changeset
372 if (nib & 0x08)
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diff changeset
373 lNewSamp = lPredSamp + (header->iDelta * (nib - 0x10));
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diff changeset
374 else
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diff changeset
375 lNewSamp = lPredSamp + (header->iDelta * nib);
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diff changeset
376
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diff changeset
377 /* clamp value... */
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378 if (lNewSamp < min_audioval)
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diff changeset
379 lNewSamp = min_audioval;
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diff changeset
380 else if (lNewSamp > max_audioval)
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diff changeset
381 lNewSamp = max_audioval;
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diff changeset
382
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diff changeset
383 delta = ((Sint32) header->iDelta * AdaptionTable[nib]) /
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diff changeset
384 FIXED_POINT_ADAPTION_BASE;
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diff changeset
385
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diff changeset
386 if (delta < SMALLEST_ADPCM_DELTA)
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diff changeset
387 delta = SMALLEST_ADPCM_DELTA;
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diff changeset
388
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diff changeset
389 header->iDelta = delta;
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diff changeset
390 header->iSamp2 = header->iSamp1;
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diff changeset
391 header->iSamp1 = lNewSamp;
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diff changeset
392 } /* do_adpcm_nibble */
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diff changeset
393
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diff changeset
394
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diff changeset
395 static inline int decode_adpcm_sample_frame(Sound_Sample *sample)
183
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diff changeset
396 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
397 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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diff changeset
398 wav_t *w = (wav_t *) internal->decoder_private;
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diff changeset
399 fmt_t *fmt = w->fmt;
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diff changeset
400 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
185
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diff changeset
401 SDL_RWops *rw = internal->rw;
183
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parents: 178
diff changeset
402 int i;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
403 int max = fmt->wChannels;
185
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diff changeset
404 Sint32 delta;
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diff changeset
405 Uint8 nib = fmt->fmt.adpcm.nibble;
183
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diff changeset
406
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 for (i = 0; i < max; i++)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
408 {
185
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diff changeset
409 Uint8 byte;
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parents: 183
diff changeset
410 Sint16 iCoef1 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].iCoef1;
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parents: 183
diff changeset
411 Sint16 iCoef2 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].iCoef2;
183
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diff changeset
412 Sint32 lPredSamp = ((headers[i].iSamp1 * iCoef1) +
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diff changeset
413 (headers[i].iSamp2 * iCoef2)) /
185
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diff changeset
414 FIXED_POINT_COEF_BASE;
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parents: 183
diff changeset
415
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diff changeset
416 if (fmt->fmt.adpcm.nibble_state == 0)
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diff changeset
417 {
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diff changeset
418 BAIL_IF_MACRO(!read_uint8(rw, &nib), NULL, 0);
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diff changeset
419 fmt->fmt.adpcm.nibble_state = 1;
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diff changeset
420 do_adpcm_nibble(nib >> 4, &headers[i], lPredSamp);
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parents: 183
diff changeset
421 } /* if */
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diff changeset
422 else
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parents: 183
diff changeset
423 {
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diff changeset
424 fmt->fmt.adpcm.nibble_state = 0;
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diff changeset
425 do_adpcm_nibble(nib & 0x0F, &headers[i], lPredSamp);
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parents: 183
diff changeset
426 } /* else */
183
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diff changeset
427 } /* for */
185
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diff changeset
428
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diff changeset
429 fmt->fmt.adpcm.nibble = nib;
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diff changeset
430 return(1);
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parents: 183
diff changeset
431 } /* decode_adpcm_sample_frame */
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parents: 183
diff changeset
432
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parents: 183
diff changeset
433
242
12a9c2e0b00f Fixed compiler warnings (thanks, Darrell!)
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
434 static inline void put_adpcm_sample_frame1(void *_buf, fmt_t *fmt)
185
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diff changeset
435 {
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diff changeset
436 Uint16 *buf = (Uint16 *) _buf;
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diff changeset
437 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
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parents: 183
diff changeset
438 int i;
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diff changeset
439 for (i = 0; i < fmt->wChannels; i++)
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parents: 183
diff changeset
440 *(buf++) = headers[i].iSamp1;
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parents: 183
diff changeset
441 } /* put_adpcm_sample_frame1 */
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parents: 183
diff changeset
442
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
443
242
12a9c2e0b00f Fixed compiler warnings (thanks, Darrell!)
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
444 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
445 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
446 Uint16 *buf = (Uint16 *) _buf;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
447 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
448 int i;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
449 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
450 *(buf++) = headers[i].iSamp2;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
451 } /* 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
452
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
453
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
454 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
455 * 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
456 */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
457 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
458 {
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
459 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
460 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
461 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
462 Uint32 bw = 0;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
463
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
464 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
465 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
466 /* 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
467 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
468 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
469 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
470 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
471 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
472 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
473 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
474 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
475 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
476
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
477 /* 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
478 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
479 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
480 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
481 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
482
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
483 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
484 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
485 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
486 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
487 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
488
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
489 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
490 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
491 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
492 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
493
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
494 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
495 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
496 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
497 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
498 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
499 } /* switch */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
500 } /* while */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
501
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
502 return(bw);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
503 } /* read_sample_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
504
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
505
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
506 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
507 * 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
508 */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
509 static void free_fmt_adpcm(fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
510 {
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
511 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
512 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
513
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
514 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
515 free(fmt->fmt.adpcm.blockheaders);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
516 } /* free_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
517
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
518
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
519 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
520 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
521 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
522 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
523 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
524 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
525 } /* rewind_sample_fmt_adpcm */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
526
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
527
307
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
528 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
529 {
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
530 return(0); /* !!! FIXME: Can we reasonably implement this? */
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
531 } /* seek_sample_fmt_adpcm */
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
532
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
533
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
534 /*
307
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
535 * 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
536 * 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
537 * structure is packed.
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
538 */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
539 static 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
540 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
541 size_t i;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
542
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
543 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
544 fmt->free = free_fmt_adpcm;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
545 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
546 fmt->rewind_sample = rewind_sample_fmt_adpcm;
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
547
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
548 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
549 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
550 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
551
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
552 /* 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
553
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
554 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
555 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
556 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
557
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
558 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
559 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
560 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
561 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
562 } /* for */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
563
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
564 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
565 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
566 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
567
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
568 return(1);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
569 } /* read_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
570
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
571
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
572
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
573 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
574 * Everything else... *
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
575 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
576
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
577 static int WAV_init(void)
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
578 {
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
579 return(1); /* always succeeds. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
580 } /* WAV_init */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
581
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
582
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
583 static void WAV_quit(void)
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Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
584 {
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
585 /* it's a no-op. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
586 } /* WAV_quit */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
587
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
588
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
589 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
590 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
591 /* 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
592 switch (fmt->wFormatTag)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
593 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
594 case FMT_NORMAL:
178
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Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
595 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
596 return(read_fmt_normal(rw, fmt));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
597
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
598 case FMT_ADPCM:
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
599 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
600 return(read_fmt_adpcm(rw, fmt));
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
601
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
602 /* add other types here. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
603
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
604 default:
193
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
605 SNDDBG(("WAV: Format 0x%X is unknown.\n",
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
606 (unsigned int) fmt->wFormatTag));
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
607 Sound_SetError("WAV: Unsupported format");
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
608 return(0); /* not supported whatsoever. */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
609 } /* switch */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
610
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
611 assert(0); /* shouldn't hit this point. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
612 return(0);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
613 } /* read_fmt */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
614
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
615
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 * 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
618 */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
619 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
620 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
621 Sint32 siz = 0;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
622 Uint32 _id = 0;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
623 Uint32 pos = SDL_RWtell(rw);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
624
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
625 while (1)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
626 {
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
627 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
628 if (_id == id)
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
629 return(1);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
630
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
631 /* 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
632 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
633 assert(siz >= 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
634 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
635 if (siz > 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
636 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
637 } /* while */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
638
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
639 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
640 } /* find_chunk */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
641
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
642
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
643 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
644 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
645 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
646 SDL_RWops *rw = internal->rw;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
647 data_t d;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
648 wav_t *w;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
649 Uint32 pos;
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
650
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
651 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
652 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
653 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
654 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
655 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
656
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
657 sample->actual.channels = (Uint8) fmt->wChannels;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
658 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
659 if ((fmt->wBitsPerSample == 4) /*|| (fmt->wBitsPerSample == 0) */ )
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
660 sample->actual.format = AUDIO_S16SYS; /* !!! FIXME ? */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
661 else if (fmt->wBitsPerSample == 8)
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
662 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
663 else if (fmt->wBitsPerSample == 16)
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
664 sample->actual.format = AUDIO_S16LSB;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
665 else
193
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
666 {
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
667 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
668 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
669 } /* else */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
670
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
671 BAIL_IF_MACRO(!read_fmt(rw, fmt), NULL, 0);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
672 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
673 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
674
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
675 w = (wav_t *) malloc(sizeof(wav_t));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
676 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
677 w->fmt = fmt;
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
678 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
679 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
680
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
681 /* !!! FIXME: Move this to Sound_SampleInfo ? */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
682 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
683 sample->actual.channels );
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
684
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
685 internal->decoder_private = (void *) w;
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 sample->flags = SOUND_SAMPLEFLAG_NONE;
307
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
688 if (fmt->wFormatTag == FMT_NORMAL)
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
689 sample->flags |= SOUND_SAMPLEFLAG_CANSEEK;
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
690
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
691 SNDDBG(("WAV: Accepting data stream.\n"));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
692 return(1); /* we'll handle this data. */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
693 } /* WAV_open_internal */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
694
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
695
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
696 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
697 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
698 int rc;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
699
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
700 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
701 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
702 memset(fmt, '\0', sizeof (fmt_t));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
703
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
704 rc = WAV_open_internal(sample, ext, fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
705 if (!rc)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
706 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
707 if (fmt->free != NULL)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
708 fmt->free(fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
709 free(fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
710 } /* if */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
711
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
712 return(rc);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
713 } /* WAV_open */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
714
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
715
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
716 static void WAV_close(Sound_Sample *sample)
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 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
719 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
720
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
721 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
722 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
723
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
724 free(w->fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
725 free(w);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
726 } /* WAV_close */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
727
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
728
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
729 static Uint32 WAV_read(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats.
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730 {
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731 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats.
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732 wav_t *w = (wav_t *) internal->decoder_private;
e46e31fdecfd Restructured to handle multiple formats.
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diff changeset
733 return(w->fmt->read_sample(sample));
17
102cf61c0816 Initial add.
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734 } /* WAV_read */
102cf61c0816 Initial add.
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parents:
diff changeset
735
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
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parents: 193
diff changeset
736
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
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diff changeset
737 static int WAV_rewind(Sound_Sample *sample)
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diff changeset
738 {
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diff changeset
739 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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diff changeset
740 wav_t *w = (wav_t *) internal->decoder_private;
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diff changeset
741 fmt_t *fmt = w->fmt;
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parents: 193
diff changeset
742 int rc = SDL_RWseek(internal->rw, fmt->data_starting_offset, SEEK_SET);
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parents: 193
diff changeset
743 BAIL_IF_MACRO(rc != fmt->data_starting_offset, ERR_IO_ERROR, 0);
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parents: 193
diff changeset
744 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
745 return(fmt->rewind_sample(sample));
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Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
746 } /* WAV_rewind */
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parents: 193
diff changeset
747
306
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 246
diff changeset
748
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 246
diff changeset
749 static int WAV_seek(Sound_Sample *sample, Uint32 ms)
c97be6e1bd27 Added framework for Sound_Seek() support.
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parents: 246
diff changeset
750 {
307
eb7c929193dd Added seek support for uncompressed WAVs.
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parents: 306
diff changeset
751 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
eb7c929193dd Added seek support for uncompressed WAVs.
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parents: 306
diff changeset
752 wav_t *w = (wav_t *) internal->decoder_private;
eb7c929193dd Added seek support for uncompressed WAVs.
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parents: 306
diff changeset
753 return(w->fmt->seek_sample(sample, ms));
306
c97be6e1bd27 Added framework for Sound_Seek() support.
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parents: 246
diff changeset
754 } /* WAV_seek */
c97be6e1bd27 Added framework for Sound_Seek() support.
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diff changeset
755
64
40006625142a Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents: 62
diff changeset
756 #endif /* SOUND_SUPPORTS_WAV */
17
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
757
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
758 /* end of wav.c ... */
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
759