annotate decoders/wav.c @ 278:dfe4a46f88f7

Updated.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 14 Mar 2002 16:38:32 +0000
parents 170b1400e060
children c97be6e1bd27
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
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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
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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
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54 static const char *extensions_wav[] = { "WAV", NULL };
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55 const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV =
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56 {
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57 {
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58 extensions_wav,
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59 "Microsoft WAVE audio format",
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60 "Ryan C. Gordon <icculus@clutteredmind.org>",
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61 "http://www.icculus.org/SDL_sound/"
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62 },
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64 WAV_init, /* init() method */
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65 WAV_quit, /* quit() method */
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66 WAV_open, /* open() method */
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67 WAV_close, /* close() method */
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68 WAV_read, /* read() method */
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69 WAV_rewind /* rewind() method */
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70 };
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73 /* Better than SDL_ReadLE16, since you can detect i/o errors... */
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74 static inline int read_le16(SDL_RWops *rw, Uint16 *ui16)
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75 {
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76 int rc = SDL_RWread(rw, ui16, sizeof (Uint16), 1);
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77 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
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78 *ui16 = SDL_SwapLE16(*ui16);
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79 return(1);
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80 } /* read_le16 */
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81
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82
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83 /* Better than SDL_ReadLE32, since you can detect i/o errors... */
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84 static inline int read_le32(SDL_RWops *rw, Uint32 *ui32)
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85 {
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86 int rc = SDL_RWread(rw, ui32, sizeof (Uint32), 1);
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87 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
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88 *ui32 = SDL_SwapLE32(*ui32);
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89 return(1);
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90 } /* read_le32 */
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92
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93 /* This is just cleaner on the caller's end... */
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94 static inline int read_uint8(SDL_RWops *rw, Uint8 *ui8)
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95 {
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96 int rc = SDL_RWread(rw, ui8, sizeof (Uint8), 1);
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97 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
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98 return(1);
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99 } /* read_uint8 */
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100
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102 /* Chunk management code... */
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103
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104 #define riffID 0x46464952 /* "RIFF", in ascii. */
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105 #define waveID 0x45564157 /* "WAVE", in ascii. */
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106 #define factID 0x74636166 /* "fact", in ascii. */
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107
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108
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109 /*****************************************************************************
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110 * The FORMAT chunk... *
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111 *****************************************************************************/
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112
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113 #define fmtID 0x20746D66 /* "fmt ", in ascii. */
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114
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115 #define FMT_NORMAL 0x0001 /* Uncompressed waveform data. */
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116 #define FMT_ADPCM 0x0002 /* ADPCM compressed waveform data. */
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117
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118 typedef struct
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119 {
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120 Sint16 iCoef1;
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121 Sint16 iCoef2;
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122 } ADPCMCOEFSET;
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124 typedef struct
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125 {
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126 Uint8 bPredictor;
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127 Uint16 iDelta;
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128 Sint16 iSamp1;
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129 Sint16 iSamp2;
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130 } ADPCMBLOCKHEADER;
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131
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132 typedef struct S_WAV_FMT_T
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133 {
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134 Uint32 chunkID;
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135 Sint32 chunkSize;
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136 Sint16 wFormatTag;
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137 Uint16 wChannels;
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138 Uint32 dwSamplesPerSec;
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139 Uint32 dwAvgBytesPerSec;
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140 Uint16 wBlockAlign;
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141 Uint16 wBitsPerSample;
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142
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143 Uint32 sample_frame_size;
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144 Uint32 data_starting_offset;
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145 Uint32 total_bytes;
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146
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147 void (*free)(struct S_WAV_FMT_T *fmt);
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148 Uint32 (*read_sample)(Sound_Sample *sample);
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149 int (*rewind_sample)(Sound_Sample *sample);
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150
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151 union
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152 {
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153 struct
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154 {
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155 Uint16 cbSize;
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156 Uint16 wSamplesPerBlock;
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157 Uint16 wNumCoef;
183
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158 ADPCMCOEFSET *aCoef;
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159 ADPCMBLOCKHEADER *blockheaders;
185
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160 Uint32 samples_left_in_block;
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161 int nibble_state;
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162 Sint8 nibble;
124
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163 } adpcm;
178
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164
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165 /* put other format-specific data here... */
124
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166 } fmt;
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167 } fmt_t;
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168
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169
17
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170 /*
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171 * Read in a fmt_t from disk. This makes this process safe regardless of
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172 * the processor's byte order or how the fmt_t structure is packed.
124
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173 * Note that the union "fmt" is not read in here; that is handled as
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174 * needed in the read_fmt_* functions.
17
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175 */
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176 static int read_fmt_chunk(SDL_RWops *rw, fmt_t *fmt)
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177 {
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178 /* skip reading the chunk ID, since it was already read at this point... */
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179 fmt->chunkID = fmtID;
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180
183
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181 BAIL_IF_MACRO(!read_le32(rw, &fmt->chunkSize), NULL, 0);
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182 BAIL_IF_MACRO(!read_le16(rw, &fmt->wFormatTag), NULL, 0);
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183 BAIL_IF_MACRO(!read_le16(rw, &fmt->wChannels), NULL, 0);
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184 BAIL_IF_MACRO(!read_le32(rw, &fmt->dwSamplesPerSec), NULL, 0);
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185 BAIL_IF_MACRO(!read_le32(rw, &fmt->dwAvgBytesPerSec), NULL, 0);
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186 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBlockAlign), NULL, 0);
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187 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBitsPerSample), NULL, 0);
17
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188
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189 return(1);
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190 } /* read_fmt_chunk */
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191
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192
124
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193
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194 /*****************************************************************************
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195 * The DATA chunk... *
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196 *****************************************************************************/
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197
17
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198 #define dataID 0x61746164 /* "data", in ascii. */
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199
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200 typedef struct
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201 {
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202 Uint32 chunkID;
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203 Sint32 chunkSize;
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204 /* Then, (chunkSize) bytes of waveform data... */
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205 } data_t;
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206
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207
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208 /*
124
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209 * Read in a data_t from disk. This makes this process safe regardless of
17
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210 * the processor's byte order or how the fmt_t structure is packed.
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211 */
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212 static int read_data_chunk(SDL_RWops *rw, data_t *data)
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213 {
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214 /* skip reading the chunk ID, since it was already read at this point... */
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215 data->chunkID = dataID;
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216 BAIL_IF_MACRO(!read_le32(rw, &data->chunkSize), NULL, 0);
17
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217 return(1);
40
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218 } /* read_data_chunk */
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219
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220
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221
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222
124
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223 /*****************************************************************************
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224 * this is what we store in our internal->decoder_private field... *
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225 *****************************************************************************/
17
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226
124
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227 typedef struct
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228 {
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229 fmt_t *fmt;
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230 Sint32 bytesLeft;
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231 } wav_t;
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232
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233
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234
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235
124
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236 /*****************************************************************************
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237 * Normal, uncompressed waveform handler... *
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238 *****************************************************************************/
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239
185
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240 /*
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241 * Sound_Decode() lands here for uncompressed WAVs...
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242 */
124
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243 static Uint32 read_sample_fmt_normal(Sound_Sample *sample)
17
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244 {
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245 Uint32 retval;
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246 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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247 wav_t *w = (wav_t *) internal->decoder_private;
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248 Uint32 max = (internal->buffer_size < (Uint32) w->bytesLeft) ?
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249 internal->buffer_size : (Uint32) w->bytesLeft;
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250
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251 assert(max > 0);
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252
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253 /*
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254 * We don't actually do any decoding, so we read the wav data
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255 * directly into the internal buffer...
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256 */
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257 retval = SDL_RWread(internal->rw, internal->buffer, 1, max);
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258
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259 w->bytesLeft -= retval;
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260
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261 /* Make sure the read went smoothly... */
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262 if ((retval == 0) || (w->bytesLeft == 0))
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263 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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264
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265 else if (retval == -1)
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266 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
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267
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268 /* (next call this EAGAIN may turn into an EOF or error.) */
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269 else if (retval < internal->buffer_size)
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270 sample->flags |= SOUND_SAMPLEFLAG_EAGAIN;
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271
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272 return(retval);
124
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273 } /* read_sample_fmt_normal */
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274
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275
221
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276 static int rewind_sample_fmt_normal(Sound_Sample *sample)
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277 {
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278 /* no-op. */
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279 return(1);
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280 } /* rewind_sample_fmt_normal */
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281
124
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282
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283 static int read_fmt_normal(SDL_RWops *rw, fmt_t *fmt)
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284 {
178
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285 /* (don't need to read more from the RWops...) */
183
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diff changeset
286 fmt->free = NULL;
124
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287 fmt->read_sample = read_sample_fmt_normal;
221
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diff changeset
288 fmt->rewind_sample = rewind_sample_fmt_normal;
124
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diff changeset
289 return(1);
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290 } /* read_fmt_normal */
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291
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diff changeset
292
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293
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294 /*****************************************************************************
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295 * ADPCM compression handler... *
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296 *****************************************************************************/
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297
185
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298 #define FIXED_POINT_COEF_BASE 256
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299 #define FIXED_POINT_ADAPTION_BASE 256
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300 #define SMALLEST_ADPCM_DELTA 16
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diff changeset
301
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302
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303 static inline int read_adpcm_block_headers(Sound_Sample *sample)
183
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diff changeset
304 {
185
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305 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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306 SDL_RWops *rw = internal->rw;
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307 wav_t *w = (wav_t *) internal->decoder_private;
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diff changeset
308 fmt_t *fmt = w->fmt;
183
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diff changeset
309 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
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310 int i;
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311 int max = fmt->wChannels;
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312
185
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313 if (w->bytesLeft < fmt->wBlockAlign)
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314 {
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315 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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316 return(0);
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317 } /* if */
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318
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319 w->bytesLeft -= fmt->wBlockAlign;
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diff changeset
320
183
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321 for (i = 0; i < max; i++)
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322 BAIL_IF_MACRO(!read_uint8(rw, &headers[i].bPredictor), NULL, 0);
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323
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324 for (i = 0; i < max; i++)
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325 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iDelta), NULL, 0);
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326
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327 for (i = 0; i < max; i++)
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328 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iSamp1), NULL, 0);
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diff changeset
329
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330 for (i = 0; i < max; i++)
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331 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iSamp2), NULL, 0);
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332
185
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333 fmt->fmt.adpcm.samples_left_in_block = fmt->fmt.adpcm.wSamplesPerBlock;
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334 fmt->fmt.adpcm.nibble_state = 0;
183
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335 return(1);
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336 } /* read_adpcm_block_headers */
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337
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338
185
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339 static inline void do_adpcm_nibble(Uint8 nib,
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340 ADPCMBLOCKHEADER *header,
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341 Sint32 lPredSamp)
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342 {
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343 static const Sint32 max_audioval = ((1<<(16-1))-1);
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344 static const Sint32 min_audioval = -(1<<(16-1));
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345 static const Sint32 AdaptionTable[] =
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346 {
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347 230, 230, 230, 230, 307, 409, 512, 614,
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348 768, 614, 512, 409, 307, 230, 230, 230
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349 };
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350
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351 Sint32 lNewSamp;
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352 Sint32 delta;
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353
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354 if (nib & 0x08)
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355 lNewSamp = lPredSamp + (header->iDelta * (nib - 0x10));
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diff changeset
356 else
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357 lNewSamp = lPredSamp + (header->iDelta * nib);
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358
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diff changeset
359 /* clamp value... */
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360 if (lNewSamp < min_audioval)
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361 lNewSamp = min_audioval;
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362 else if (lNewSamp > max_audioval)
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diff changeset
363 lNewSamp = max_audioval;
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diff changeset
364
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365 delta = ((Sint32) header->iDelta * AdaptionTable[nib]) /
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366 FIXED_POINT_ADAPTION_BASE;
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367
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diff changeset
368 if (delta < SMALLEST_ADPCM_DELTA)
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369 delta = SMALLEST_ADPCM_DELTA;
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diff changeset
370
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371 header->iDelta = delta;
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372 header->iSamp2 = header->iSamp1;
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373 header->iSamp1 = lNewSamp;
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374 } /* do_adpcm_nibble */
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diff changeset
375
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376
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diff changeset
377 static inline int decode_adpcm_sample_frame(Sound_Sample *sample)
183
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378 {
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379 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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380 wav_t *w = (wav_t *) internal->decoder_private;
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381 fmt_t *fmt = w->fmt;
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diff changeset
382 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
185
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diff changeset
383 SDL_RWops *rw = internal->rw;
183
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diff changeset
384 int i;
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385 int max = fmt->wChannels;
185
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diff changeset
386 Sint32 delta;
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diff changeset
387 Uint8 nib = fmt->fmt.adpcm.nibble;
183
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diff changeset
388
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diff changeset
389 for (i = 0; i < max; i++)
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diff changeset
390 {
185
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diff changeset
391 Uint8 byte;
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392 Sint16 iCoef1 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].iCoef1;
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393 Sint16 iCoef2 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].iCoef2;
183
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394 Sint32 lPredSamp = ((headers[i].iSamp1 * iCoef1) +
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395 (headers[i].iSamp2 * iCoef2)) /
185
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diff changeset
396 FIXED_POINT_COEF_BASE;
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diff changeset
397
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diff changeset
398 if (fmt->fmt.adpcm.nibble_state == 0)
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diff changeset
399 {
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diff changeset
400 BAIL_IF_MACRO(!read_uint8(rw, &nib), NULL, 0);
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diff changeset
401 fmt->fmt.adpcm.nibble_state = 1;
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diff changeset
402 do_adpcm_nibble(nib >> 4, &headers[i], lPredSamp);
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diff changeset
403 } /* if */
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diff changeset
404 else
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parents: 183
diff changeset
405 {
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diff changeset
406 fmt->fmt.adpcm.nibble_state = 0;
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diff changeset
407 do_adpcm_nibble(nib & 0x0F, &headers[i], lPredSamp);
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diff changeset
408 } /* else */
183
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diff changeset
409 } /* for */
185
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diff changeset
410
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diff changeset
411 fmt->fmt.adpcm.nibble = nib;
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diff changeset
412 return(1);
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parents: 183
diff changeset
413 } /* decode_adpcm_sample_frame */
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diff changeset
414
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diff changeset
415
242
12a9c2e0b00f Fixed compiler warnings (thanks, Darrell!)
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
416 static inline void put_adpcm_sample_frame1(void *_buf, fmt_t *fmt)
185
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diff changeset
417 {
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diff changeset
418 Uint16 *buf = (Uint16 *) _buf;
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diff changeset
419 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
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diff changeset
420 int i;
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diff changeset
421 for (i = 0; i < fmt->wChannels; i++)
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diff changeset
422 *(buf++) = headers[i].iSamp1;
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diff changeset
423 } /* put_adpcm_sample_frame1 */
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diff changeset
424
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diff changeset
425
242
12a9c2e0b00f Fixed compiler warnings (thanks, Darrell!)
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
426 static inline void put_adpcm_sample_frame2(void *_buf, fmt_t *fmt)
185
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diff changeset
427 {
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diff changeset
428 Uint16 *buf = (Uint16 *) _buf;
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diff changeset
429 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
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diff changeset
430 int i;
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diff changeset
431 for (i = 0; i < fmt->wChannels; i++)
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diff changeset
432 *(buf++) = headers[i].iSamp2;
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diff changeset
433 } /* put_adpcm_sample_frame2 */
183
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diff changeset
434
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
435
185
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diff changeset
436 /*
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diff changeset
437 * Sound_Decode() lands here for ADPCM-encoded WAVs...
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parents: 183
diff changeset
438 */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
439 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
440 {
185
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diff changeset
441 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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diff changeset
442 wav_t *w = (wav_t *) internal->decoder_private;
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diff changeset
443 fmt_t *fmt = w->fmt;
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diff changeset
444 Uint32 bw = 0;
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 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
447 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
448 /* 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
449 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
450 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
451 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
452 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
453 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
454 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
455 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
456 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
457 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
458
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
459 /* 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
460 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
461 fmt->fmt.adpcm.samples_left_in_block--;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
462 bw += fmt->sample_frame_size;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
463 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
464
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
465 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
466 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
467 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 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
469 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
470
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
471 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
472 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
473 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
474 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
475
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
476 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
477 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
478 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
479 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
480 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
481 } /* switch */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
482 } /* while */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
483
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
484 return(bw);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
485 } /* read_sample_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
486
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
487
185
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 * 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
490 */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
491 static void free_fmt_adpcm(fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
492 {
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
493 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
494 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
495
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
496 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
497 free(fmt->fmt.adpcm.blockheaders);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
498 } /* free_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
499
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
500
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
501 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
502 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
503 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
504 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
505 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
506 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
507 } /* rewind_sample_fmt_adpcm */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
508
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
509
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
510 /*
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
511 * Read in a the adpcm-specific info from disk. This makes this process
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
512 * 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
513 * structure is packed.
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
514 */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
515 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
516 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
517 size_t i;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
518
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
519 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
520 fmt->free = free_fmt_adpcm;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
521 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
522 fmt->rewind_sample = rewind_sample_fmt_adpcm;
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
523
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
524 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
525 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
526 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
527
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
528 /* 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
529
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
530 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
531 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
532 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
533
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
534 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
535 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
536 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
537 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
538 } /* for */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
539
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
540 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
541 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
542 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
543
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
544 return(1);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
545 } /* read_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
546
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
547
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
548
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
549 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
550 * Everything else... *
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
551 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
552
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
553 static int WAV_init(void)
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
554 {
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
555 return(1); /* always succeeds. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
556 } /* WAV_init */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
557
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
558
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
559 static void WAV_quit(void)
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
560 {
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
561 /* it's a no-op. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
562 } /* WAV_quit */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
563
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
564
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
565 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
566 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
567 /* 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
568 switch (fmt->wFormatTag)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
569 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
570 case FMT_NORMAL:
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
571 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
572 return(read_fmt_normal(rw, fmt));
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 case FMT_ADPCM:
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
575 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
576 return(read_fmt_adpcm(rw, fmt));
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
577
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
578 /* add other types here. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
579
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
580 default:
193
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
581 SNDDBG(("WAV: Format 0x%X is unknown.\n",
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
582 (unsigned int) fmt->wFormatTag));
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
583 Sound_SetError("WAV: Unsupported format");
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
584 return(0); /* not supported whatsoever. */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
585 } /* switch */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
586
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
587 assert(0); /* shouldn't hit this point. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
588 return(0);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
589 } /* read_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
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
592 /*
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
593 * 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
594 */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
595 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
596 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
597 Sint32 siz = 0;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
598 Uint32 _id = 0;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
599 Uint32 pos = SDL_RWtell(rw);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
600
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
601 while (1)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
602 {
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
603 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
604 if (_id == id)
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
605 return(1);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
606
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
607 /* 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
608 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
609 assert(siz >= 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
610 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
611 if (siz > 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
612 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
613 } /* while */
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 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
616 } /* find_chunk */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
617
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
618
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
619 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
620 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
621 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
622 SDL_RWops *rw = internal->rw;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
623 data_t d;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
624 wav_t *w;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
625 Uint32 pos;
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
626
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
627 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
628 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
629 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
630 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
631 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
632
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
633 sample->actual.channels = (Uint8) fmt->wChannels;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
634 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
635 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
636 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
637 else if (fmt->wBitsPerSample == 8)
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
638 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
639 else if (fmt->wBitsPerSample == 16)
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
640 sample->actual.format = AUDIO_S16LSB;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
641 else
193
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
642 {
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
643 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
644 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
645 } /* else */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
646
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
647 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
648 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
649 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
650
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
651 w = (wav_t *) malloc(sizeof(wav_t));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
652 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
653 w->fmt = fmt;
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
654 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
655 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
656
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
657 /* !!! FIXME: Move this to Sound_SampleInfo ? */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
658 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
659 sample->actual.channels );
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
660
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
661 internal->decoder_private = (void *) w;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
662
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
663 sample->flags = SOUND_SAMPLEFLAG_NONE;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
664
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
665 SNDDBG(("WAV: Accepting data stream.\n"));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
666 return(1); /* we'll handle this data. */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
667 } /* WAV_open_internal */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
668
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
669
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
670 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
671 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
672 int rc;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
673
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
674 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
675 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
676 memset(fmt, '\0', sizeof (fmt_t));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
677
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
678 rc = WAV_open_internal(sample, ext, fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
679 if (!rc)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
680 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
681 if (fmt->free != NULL)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
682 fmt->free(fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
683 free(fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
684 } /* if */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
685
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
686 return(rc);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
687 } /* WAV_open */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
688
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
689
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
690 static void WAV_close(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
691 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
692 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
693 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
694
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
695 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
696 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
697
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
698 free(w->fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
699 free(w);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
700 } /* WAV_close */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
701
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
702
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
703 static Uint32 WAV_read(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
704 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
705 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
706 wav_t *w = (wav_t *) internal->decoder_private;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
707 return(w->fmt->read_sample(sample));
17
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
708 } /* WAV_read */
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
709
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
710
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
711 static int WAV_rewind(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
712 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
713 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
714 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
715 fmt_t *fmt = w->fmt;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
716 int rc = SDL_RWseek(internal->rw, fmt->data_starting_offset, SEEK_SET);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
717 BAIL_IF_MACRO(rc != fmt->data_starting_offset, ERR_IO_ERROR, 0);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
718 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
719 return(fmt->rewind_sample(sample));
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
720 } /* WAV_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
721
64
40006625142a Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents: 62
diff changeset
722 #endif /* SOUND_SUPPORTS_WAV */
17
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
723
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
724 /* end of wav.c ... */
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
725