annotate decoders/wav.c @ 453:b9856ba6fb4e

Updated comments on supported files to include Speex.
author Ryan C. Gordon <icculus@icculus.org>
date Sat, 13 Sep 2003 20:35:24 +0000
parents c42ac9ee2ce4
children c66080364dff 50bb9a6cebfe
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
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41 #include "SDL_sound.h"
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42
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43 #define __SDL_SOUND_INTERNAL__
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44 #include "SDL_sound_internal.h"
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45
47
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46 static int WAV_init(void);
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47 static void WAV_quit(void);
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48 static int WAV_open(Sound_Sample *sample, const char *ext);
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49 static void WAV_close(Sound_Sample *sample);
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50 static Uint32 WAV_read(Sound_Sample *sample);
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51 static int WAV_rewind(Sound_Sample *sample);
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52 static int WAV_seek(Sound_Sample *sample, Uint32 ms);
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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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63
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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 WAV_seek /* seek() method */
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71 };
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74 /* Better than SDL_ReadLE16, since you can detect i/o errors... */
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75 static __inline__ int read_le16(SDL_RWops *rw, Uint16 *ui16)
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76 {
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77 int rc = SDL_RWread(rw, ui16, sizeof (Uint16), 1);
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78 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
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79 *ui16 = SDL_SwapLE16(*ui16);
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80 return(1);
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81 } /* read_le16 */
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82
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83
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84 /* Better than SDL_ReadLE32, since you can detect i/o errors... */
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85 static __inline__ int read_le32(SDL_RWops *rw, Uint32 *ui32)
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86 {
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87 int rc = SDL_RWread(rw, ui32, sizeof (Uint32), 1);
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88 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
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89 *ui32 = SDL_SwapLE32(*ui32);
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90 return(1);
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91 } /* read_le32 */
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92
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93
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94 /* This is just cleaner on the caller's end... */
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95 static __inline__ int read_uint8(SDL_RWops *rw, Uint8 *ui8)
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96 {
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97 int rc = SDL_RWread(rw, ui8, sizeof (Uint8), 1);
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98 BAIL_IF_MACRO(rc != 1, ERR_IO_ERROR, 0);
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99 return(1);
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100 } /* read_uint8 */
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101
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103 /* Chunk management code... */
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104
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105 #define riffID 0x46464952 /* "RIFF", in ascii. */
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106 #define waveID 0x45564157 /* "WAVE", in ascii. */
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107 #define factID 0x74636166 /* "fact", in ascii. */
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108
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109
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110 /*****************************************************************************
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111 * The FORMAT chunk... *
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112 *****************************************************************************/
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113
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114 #define fmtID 0x20746D66 /* "fmt ", in ascii. */
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115
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116 #define FMT_NORMAL 0x0001 /* Uncompressed waveform data. */
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117 #define FMT_ADPCM 0x0002 /* ADPCM compressed waveform data. */
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118
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119 typedef struct
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120 {
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121 Sint16 iCoef1;
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122 Sint16 iCoef2;
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123 } ADPCMCOEFSET;
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125 typedef struct
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126 {
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127 Uint8 bPredictor;
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128 Uint16 iDelta;
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129 Sint16 iSamp1;
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130 Sint16 iSamp2;
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131 } ADPCMBLOCKHEADER;
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132
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133 typedef struct S_WAV_FMT_T
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134 {
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135 Uint32 chunkID;
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136 Sint32 chunkSize;
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137 Sint16 wFormatTag;
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138 Uint16 wChannels;
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139 Uint32 dwSamplesPerSec;
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140 Uint32 dwAvgBytesPerSec;
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141 Uint16 wBlockAlign;
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142 Uint16 wBitsPerSample;
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143
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144 Uint32 next_chunk_offset;
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145
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146 Uint32 sample_frame_size;
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147 Uint32 data_starting_offset;
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148 Uint32 total_bytes;
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149
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150 void (*free)(struct S_WAV_FMT_T *fmt);
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151 Uint32 (*read_sample)(Sound_Sample *sample);
221
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152 int (*rewind_sample)(Sound_Sample *sample);
307
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153 int (*seek_sample)(Sound_Sample *sample, Uint32 ms);
124
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154
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155 union
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156 {
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157 struct
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158 {
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159 Uint16 cbSize;
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160 Uint16 wSamplesPerBlock;
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161 Uint16 wNumCoef;
183
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162 ADPCMCOEFSET *aCoef;
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163 ADPCMBLOCKHEADER *blockheaders;
185
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164 Uint32 samples_left_in_block;
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diff changeset
165 int nibble_state;
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diff changeset
166 Sint8 nibble;
124
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167 } adpcm;
178
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168
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169 /* put other format-specific data here... */
124
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170 } fmt;
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171 } fmt_t;
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172
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173
17
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174 /*
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175 * Read in a fmt_t from disk. This makes this process safe regardless of
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176 * the processor's byte order or how the fmt_t structure is packed.
124
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177 * Note that the union "fmt" is not read in here; that is handled as
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178 * needed in the read_fmt_* functions.
17
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179 */
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180 static int read_fmt_chunk(SDL_RWops *rw, fmt_t *fmt)
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181 {
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182 /* skip reading the chunk ID, since it was already read at this point... */
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183 fmt->chunkID = fmtID;
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184
183
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185 BAIL_IF_MACRO(!read_le32(rw, &fmt->chunkSize), NULL, 0);
364
4bcbc442d145 Fix to handle strange WAV fmt chunks.
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186 BAIL_IF_MACRO(fmt->chunkSize < 16, "WAV: Invalid chunk size", 0);
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187 fmt->next_chunk_offset = SDL_RWtell(rw) + fmt->chunkSize;
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188
183
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189 BAIL_IF_MACRO(!read_le16(rw, &fmt->wFormatTag), NULL, 0);
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190 BAIL_IF_MACRO(!read_le16(rw, &fmt->wChannels), NULL, 0);
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191 BAIL_IF_MACRO(!read_le32(rw, &fmt->dwSamplesPerSec), NULL, 0);
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192 BAIL_IF_MACRO(!read_le32(rw, &fmt->dwAvgBytesPerSec), NULL, 0);
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193 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBlockAlign), NULL, 0);
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194 BAIL_IF_MACRO(!read_le16(rw, &fmt->wBitsPerSample), NULL, 0);
17
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195
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196 return(1);
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197 } /* read_fmt_chunk */
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198
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199
124
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200
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201 /*****************************************************************************
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202 * The DATA chunk... *
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203 *****************************************************************************/
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204
17
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205 #define dataID 0x61746164 /* "data", in ascii. */
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206
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207 typedef struct
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208 {
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209 Uint32 chunkID;
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210 Sint32 chunkSize;
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parents:
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211 /* Then, (chunkSize) bytes of waveform data... */
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212 } data_t;
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213
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214
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Ryan C. Gordon <icculus@icculus.org>
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215 /*
124
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216 * Read in a data_t from disk. This makes this process safe regardless of
17
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217 * the processor's byte order or how the fmt_t structure is packed.
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218 */
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219 static int read_data_chunk(SDL_RWops *rw, data_t *data)
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220 {
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221 /* skip reading the chunk ID, since it was already read at this point... */
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222 data->chunkID = dataID;
183
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diff changeset
223 BAIL_IF_MACRO(!read_le32(rw, &data->chunkSize), NULL, 0);
17
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224 return(1);
40
c15396fc0e55 Fixed incorrect comment, by Torbj�rn Andersson. :)
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diff changeset
225 } /* read_data_chunk */
17
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226
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227
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228
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229
124
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230 /*****************************************************************************
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diff changeset
231 * this is what we store in our internal->decoder_private field... *
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232 *****************************************************************************/
17
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233
124
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diff changeset
234 typedef struct
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235 {
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236 fmt_t *fmt;
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diff changeset
237 Sint32 bytesLeft;
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diff changeset
238 } wav_t;
17
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239
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240
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241
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242
124
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diff changeset
243 /*****************************************************************************
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diff changeset
244 * Normal, uncompressed waveform handler... *
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245 *****************************************************************************/
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246
185
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diff changeset
247 /*
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diff changeset
248 * Sound_Decode() lands here for uncompressed WAVs...
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diff changeset
249 */
124
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diff changeset
250 static Uint32 read_sample_fmt_normal(Sound_Sample *sample)
17
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251 {
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252 Uint32 retval;
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parents:
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253 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
102cf61c0816 Initial add.
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parents:
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254 wav_t *w = (wav_t *) internal->decoder_private;
102cf61c0816 Initial add.
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255 Uint32 max = (internal->buffer_size < (Uint32) w->bytesLeft) ?
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256 internal->buffer_size : (Uint32) w->bytesLeft;
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257
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258 assert(max > 0);
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259
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Ryan C. Gordon <icculus@icculus.org>
parents:
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260 /*
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parents:
diff changeset
261 * We don't actually do any decoding, so we read the wav data
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 * directly into the internal buffer...
102cf61c0816 Initial add.
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263 */
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264 retval = SDL_RWread(internal->rw, internal->buffer, 1, max);
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265
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266 w->bytesLeft -= retval;
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267
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parents:
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268 /* Make sure the read went smoothly... */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 if ((retval == 0) || (w->bytesLeft == 0))
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270 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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271
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parents:
diff changeset
272 else if (retval == -1)
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273 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
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274
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Ryan C. Gordon <icculus@icculus.org>
parents:
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275 /* (next call this EAGAIN may turn into an EOF or error.) */
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parents:
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276 else if (retval < internal->buffer_size)
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277 sample->flags |= SOUND_SAMPLEFLAG_EAGAIN;
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278
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279 return(retval);
124
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diff changeset
280 } /* read_sample_fmt_normal */
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diff changeset
281
e46e31fdecfd Restructured to handle multiple formats.
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diff changeset
282
307
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diff changeset
283 static int seek_sample_fmt_normal(Sound_Sample *sample, Uint32 ms)
eb7c929193dd Added seek support for uncompressed WAVs.
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diff changeset
284 {
eb7c929193dd Added seek support for uncompressed WAVs.
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diff changeset
285 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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diff changeset
286 wav_t *w = (wav_t *) internal->decoder_private;
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diff changeset
287 fmt_t *fmt = w->fmt;
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diff changeset
288 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
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diff changeset
289 int pos = (int) (fmt->data_starting_offset + offset);
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diff changeset
290 int rc = SDL_RWseek(internal->rw, pos, SEEK_SET);
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diff changeset
291 BAIL_IF_MACRO(rc != pos, ERR_IO_ERROR, 0);
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diff changeset
292 w->bytesLeft = fmt->total_bytes - offset;
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diff changeset
293 return(1); /* success. */
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diff changeset
294 } /* seek_sample_fmt_normal */
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diff changeset
295
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diff changeset
296
221
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diff changeset
297 static int rewind_sample_fmt_normal(Sound_Sample *sample)
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diff changeset
298 {
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diff changeset
299 /* no-op. */
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diff changeset
300 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
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diff changeset
301 } /* rewind_sample_fmt_normal */
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diff changeset
302
124
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diff changeset
303
e46e31fdecfd Restructured to handle multiple formats.
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diff changeset
304 static int read_fmt_normal(SDL_RWops *rw, fmt_t *fmt)
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diff changeset
305 {
178
bdbe09014724 Minor tweaks and such.
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diff changeset
306 /* (don't need to read more from the RWops...) */
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
307 fmt->free = NULL;
124
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308 fmt->read_sample = read_sample_fmt_normal;
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
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diff changeset
309 fmt->rewind_sample = rewind_sample_fmt_normal;
307
eb7c929193dd Added seek support for uncompressed WAVs.
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diff changeset
310 fmt->seek_sample = seek_sample_fmt_normal;
124
e46e31fdecfd Restructured to handle multiple formats.
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diff changeset
311 return(1);
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diff changeset
312 } /* read_fmt_normal */
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diff changeset
313
e46e31fdecfd Restructured to handle multiple formats.
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diff changeset
314
e46e31fdecfd Restructured to handle multiple formats.
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315
e46e31fdecfd Restructured to handle multiple formats.
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316 /*****************************************************************************
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317 * ADPCM compression handler... *
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318 *****************************************************************************/
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diff changeset
319
185
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320 #define FIXED_POINT_COEF_BASE 256
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diff changeset
321 #define FIXED_POINT_ADAPTION_BASE 256
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322 #define SMALLEST_ADPCM_DELTA 16
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diff changeset
323
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324
401
c42ac9ee2ce4 Fixed "inline" keyword to compile.
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diff changeset
325 static __inline__ int read_adpcm_block_headers(Sound_Sample *sample)
183
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diff changeset
326 {
185
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diff changeset
327 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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diff changeset
328 SDL_RWops *rw = internal->rw;
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diff changeset
329 wav_t *w = (wav_t *) internal->decoder_private;
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diff changeset
330 fmt_t *fmt = w->fmt;
183
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331 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
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diff changeset
332 int i;
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diff changeset
333 int max = fmt->wChannels;
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diff changeset
334
185
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diff changeset
335 if (w->bytesLeft < fmt->wBlockAlign)
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diff changeset
336 {
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diff changeset
337 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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diff changeset
338 return(0);
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diff changeset
339 } /* if */
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diff changeset
340
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diff changeset
341 w->bytesLeft -= fmt->wBlockAlign;
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diff changeset
342
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
343 for (i = 0; i < max; i++)
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diff changeset
344 BAIL_IF_MACRO(!read_uint8(rw, &headers[i].bPredictor), NULL, 0);
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diff changeset
345
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
346 for (i = 0; i < max; i++)
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diff changeset
347 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iDelta), NULL, 0);
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diff changeset
348
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
349 for (i = 0; i < max; i++)
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diff changeset
350 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iSamp1), NULL, 0);
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diff changeset
351
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
352 for (i = 0; i < max; i++)
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diff changeset
353 BAIL_IF_MACRO(!read_le16(rw, &headers[i].iSamp2), NULL, 0);
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diff changeset
354
185
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diff changeset
355 fmt->fmt.adpcm.samples_left_in_block = fmt->fmt.adpcm.wSamplesPerBlock;
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parents: 183
diff changeset
356 fmt->fmt.adpcm.nibble_state = 0;
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
357 return(1);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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diff changeset
358 } /* read_adpcm_block_headers */
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diff changeset
359
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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parents: 178
diff changeset
360
401
c42ac9ee2ce4 Fixed "inline" keyword to compile.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
361 static __inline__ void do_adpcm_nibble(Uint8 nib,
c42ac9ee2ce4 Fixed "inline" keyword to compile.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
362 ADPCMBLOCKHEADER *header,
c42ac9ee2ce4 Fixed "inline" keyword to compile.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
363 Sint32 lPredSamp)
185
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diff changeset
364 {
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diff changeset
365 static const Sint32 max_audioval = ((1<<(16-1))-1);
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diff changeset
366 static const Sint32 min_audioval = -(1<<(16-1));
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diff changeset
367 static const Sint32 AdaptionTable[] =
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diff changeset
368 {
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diff changeset
369 230, 230, 230, 230, 307, 409, 512, 614,
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parents: 183
diff changeset
370 768, 614, 512, 409, 307, 230, 230, 230
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parents: 183
diff changeset
371 };
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diff changeset
372
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diff changeset
373 Sint32 lNewSamp;
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parents: 183
diff changeset
374 Sint32 delta;
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parents: 183
diff changeset
375
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parents: 183
diff changeset
376 if (nib & 0x08)
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diff changeset
377 lNewSamp = lPredSamp + (header->iDelta * (nib - 0x10));
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parents: 183
diff changeset
378 else
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parents: 183
diff changeset
379 lNewSamp = lPredSamp + (header->iDelta * nib);
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parents: 183
diff changeset
380
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diff changeset
381 /* clamp value... */
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parents: 183
diff changeset
382 if (lNewSamp < min_audioval)
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diff changeset
383 lNewSamp = min_audioval;
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parents: 183
diff changeset
384 else if (lNewSamp > max_audioval)
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parents: 183
diff changeset
385 lNewSamp = max_audioval;
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parents: 183
diff changeset
386
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parents: 183
diff changeset
387 delta = ((Sint32) header->iDelta * AdaptionTable[nib]) /
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parents: 183
diff changeset
388 FIXED_POINT_ADAPTION_BASE;
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parents: 183
diff changeset
389
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diff changeset
390 if (delta < SMALLEST_ADPCM_DELTA)
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parents: 183
diff changeset
391 delta = SMALLEST_ADPCM_DELTA;
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parents: 183
diff changeset
392
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
393 header->iDelta = delta;
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parents: 183
diff changeset
394 header->iSamp2 = header->iSamp1;
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parents: 183
diff changeset
395 header->iSamp1 = lNewSamp;
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parents: 183
diff changeset
396 } /* do_adpcm_nibble */
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parents: 183
diff changeset
397
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
398
401
c42ac9ee2ce4 Fixed "inline" keyword to compile.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
399 static __inline__ int decode_adpcm_sample_frame(Sound_Sample *sample)
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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parents: 178
diff changeset
400 {
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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parents: 178
diff changeset
401 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
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parents: 178
diff changeset
402 wav_t *w = (wav_t *) internal->decoder_private;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
403 fmt_t *fmt = w->fmt;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
404 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
405 SDL_RWops *rw = internal->rw;
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
406 int i;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
407 int max = fmt->wChannels;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
408 Sint32 delta;
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parents: 183
diff changeset
409 Uint8 nib = fmt->fmt.adpcm.nibble;
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
410
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
411 for (i = 0; i < max; i++)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
412 {
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
413 Uint8 byte;
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parents: 183
diff changeset
414 Sint16 iCoef1 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].iCoef1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
415 Sint16 iCoef2 = fmt->fmt.adpcm.aCoef[headers[i].bPredictor].iCoef2;
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
416 Sint32 lPredSamp = ((headers[i].iSamp1 * iCoef1) +
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
417 (headers[i].iSamp2 * iCoef2)) /
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
418 FIXED_POINT_COEF_BASE;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
419
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
420 if (fmt->fmt.adpcm.nibble_state == 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
421 {
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parents: 183
diff changeset
422 BAIL_IF_MACRO(!read_uint8(rw, &nib), NULL, 0);
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parents: 183
diff changeset
423 fmt->fmt.adpcm.nibble_state = 1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
424 do_adpcm_nibble(nib >> 4, &headers[i], lPredSamp);
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Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
425 } /* if */
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Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
426 else
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
427 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
428 fmt->fmt.adpcm.nibble_state = 0;
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parents: 183
diff changeset
429 do_adpcm_nibble(nib & 0x0F, &headers[i], lPredSamp);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
430 } /* else */
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
431 } /* for */
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
432
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
433 fmt->fmt.adpcm.nibble = nib;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
434 return(1);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
435 } /* decode_adpcm_sample_frame */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
436
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
437
401
c42ac9ee2ce4 Fixed "inline" keyword to compile.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
438 static __inline__ void put_adpcm_sample_frame1(void *_buf, fmt_t *fmt)
185
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Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
439 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
440 Uint16 *buf = (Uint16 *) _buf;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
441 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
442 int i;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
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parents: 183
diff changeset
443 for (i = 0; i < fmt->wChannels; i++)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
444 *(buf++) = headers[i].iSamp1;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
445 } /* put_adpcm_sample_frame1 */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
446
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
447
401
c42ac9ee2ce4 Fixed "inline" keyword to compile.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
448 static __inline__ void put_adpcm_sample_frame2(void *_buf, fmt_t *fmt)
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
449 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
450 Uint16 *buf = (Uint16 *) _buf;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
451 ADPCMBLOCKHEADER *headers = fmt->fmt.adpcm.blockheaders;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
452 int i;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
453 for (i = 0; i < fmt->wChannels; i++)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
454 *(buf++) = headers[i].iSamp2;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
455 } /* put_adpcm_sample_frame2 */
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
456
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
457
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
458 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
459 * Sound_Decode() lands here for ADPCM-encoded WAVs...
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
460 */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
461 static Uint32 read_sample_fmt_adpcm(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
462 {
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
463 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
464 wav_t *w = (wav_t *) internal->decoder_private;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
465 fmt_t *fmt = w->fmt;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
466 Uint32 bw = 0;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
467
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
468 while (bw < internal->buffer_size)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
469 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
470 /* write ongoing sample frame before reading more data... */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
471 switch (fmt->fmt.adpcm.samples_left_in_block)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
472 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
473 case 0: /* need to read a new block... */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
474 if (!read_adpcm_block_headers(sample))
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
475 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
476 if ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
477 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
478 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
479 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
480
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
481 /* only write first sample frame for now. */
246
170b1400e060 Cast to prevent pointer arithmatic on a (void *).
Ryan C. Gordon <icculus@icculus.org>
parents: 242
diff changeset
482 put_adpcm_sample_frame2((Uint8 *) internal->buffer + bw, fmt);
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
483 fmt->fmt.adpcm.samples_left_in_block--;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
484 bw += fmt->sample_frame_size;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
485 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
486
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
487 case 1: /* output last sample frame of block... */
246
170b1400e060 Cast to prevent pointer arithmatic on a (void *).
Ryan C. Gordon <icculus@icculus.org>
parents: 242
diff changeset
488 put_adpcm_sample_frame1((Uint8 *) internal->buffer + bw, fmt);
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
489 fmt->fmt.adpcm.samples_left_in_block--;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
490 bw += fmt->sample_frame_size;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
491 break;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
492
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
493 default: /* output latest sample frame and read a new one... */
246
170b1400e060 Cast to prevent pointer arithmatic on a (void *).
Ryan C. Gordon <icculus@icculus.org>
parents: 242
diff changeset
494 put_adpcm_sample_frame1((Uint8 *) internal->buffer + bw, fmt);
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
495 fmt->fmt.adpcm.samples_left_in_block--;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
496 bw += fmt->sample_frame_size;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
497
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
498 if (!decode_adpcm_sample_frame(sample))
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
499 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
500 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
501 return(bw);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
502 } /* if */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
503 } /* switch */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
504 } /* while */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
505
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
506 return(bw);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
507 } /* read_sample_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
508
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
509
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
510 /*
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
511 * Sound_FreeSample() lands here for ADPCM-encoded WAVs...
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
512 */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
513 static void free_fmt_adpcm(fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
514 {
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
515 if (fmt->fmt.adpcm.aCoef != NULL)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
516 free(fmt->fmt.adpcm.aCoef);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
517
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
518 if (fmt->fmt.adpcm.blockheaders != NULL)
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
519 free(fmt->fmt.adpcm.blockheaders);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
520 } /* free_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
521
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
522
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
523 static int rewind_sample_fmt_adpcm(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
524 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
525 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
526 wav_t *w = (wav_t *) internal->decoder_private;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
527 w->fmt->fmt.adpcm.samples_left_in_block = 0;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
528 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
529 } /* rewind_sample_fmt_adpcm */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
530
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
531
307
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
532 static int seek_sample_fmt_adpcm(Sound_Sample *sample, Uint32 ms)
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
533 {
333
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
534 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
535 wav_t *w = (wav_t *) internal->decoder_private;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
536 fmt_t *fmt = w->fmt;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
537 Uint32 origsampsleft = fmt->fmt.adpcm.samples_left_in_block;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
538 int origpos = SDL_RWtell(internal->rw);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
539 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
540 int bpb = (fmt->fmt.adpcm.wSamplesPerBlock * fmt->sample_frame_size);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
541 int skipsize = (offset / bpb) * fmt->wBlockAlign;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
542 int pos = skipsize + fmt->data_starting_offset;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
543 int rc = SDL_RWseek(internal->rw, pos, SEEK_SET);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
544 BAIL_IF_MACRO(rc != pos, ERR_IO_ERROR, 0);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
545
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
546 /* The offset we need is in this block, so we need to decode to there. */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
547 skipsize += (offset % bpb);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
548 rc = (offset % bpb); /* bytes into this block we need to decode */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
549 if (!read_adpcm_block_headers(sample))
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
550 {
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
551 SDL_RWseek(internal->rw, origpos, SEEK_SET); /* try to make sane. */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
552 return(0);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
553 } /* if */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
554
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
555 /* first sample frame of block is a freebie. :) */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
556 fmt->fmt.adpcm.samples_left_in_block--;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
557 rc -= fmt->sample_frame_size;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
558 while (rc > 0)
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
559 {
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
560 if (!decode_adpcm_sample_frame(sample))
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
561 {
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
562 SDL_RWseek(internal->rw, origpos, SEEK_SET);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
563 fmt->fmt.adpcm.samples_left_in_block = origsampsleft;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
564 return(0);
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
565 } /* if */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
566
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
567 fmt->fmt.adpcm.samples_left_in_block--;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
568 rc -= fmt->sample_frame_size;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
569 } /* while */
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
570
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
571 w->bytesLeft = fmt->total_bytes - skipsize;
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
572 return(1); /* success. */
307
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
573 } /* seek_sample_fmt_adpcm */
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
574
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
575
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
576 /*
307
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
577 * Read in the adpcm-specific info from disk. This makes this process
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
578 * safe regardless of the processor's byte order or how the fmt_t
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
579 * structure is packed.
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
580 */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
581 static int read_fmt_adpcm(SDL_RWops *rw, fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
582 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
583 size_t i;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
584
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
585 memset(&fmt->fmt.adpcm, '\0', sizeof (fmt->fmt.adpcm));
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
586 fmt->free = free_fmt_adpcm;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
587 fmt->read_sample = read_sample_fmt_adpcm;
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
588 fmt->rewind_sample = rewind_sample_fmt_adpcm;
333
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
589 fmt->seek_sample = seek_sample_fmt_adpcm;
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
590
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
591 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.cbSize), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
592 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.wSamplesPerBlock), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
593 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.wNumCoef), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
594
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
595 /* fmt->free() is always called, so these malloc()s will be cleaned up. */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
596
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
597 i = sizeof (ADPCMCOEFSET) * fmt->fmt.adpcm.wNumCoef;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
598 fmt->fmt.adpcm.aCoef = (ADPCMCOEFSET *) malloc(i);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
599 BAIL_IF_MACRO(fmt->fmt.adpcm.aCoef == NULL, ERR_OUT_OF_MEMORY, 0);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
600
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
601 for (i = 0; i < fmt->fmt.adpcm.wNumCoef; i++)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
602 {
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
603 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.aCoef[i].iCoef1), NULL, 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
604 BAIL_IF_MACRO(!read_le16(rw, &fmt->fmt.adpcm.aCoef[i].iCoef2), NULL, 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
605 } /* for */
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
606
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
607 i = sizeof (ADPCMBLOCKHEADER) * fmt->wChannels;
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
608 fmt->fmt.adpcm.blockheaders = (ADPCMBLOCKHEADER *) malloc(i);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
609 BAIL_IF_MACRO(fmt->fmt.adpcm.blockheaders == NULL, ERR_OUT_OF_MEMORY, 0);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
610
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
611 return(1);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
612 } /* read_fmt_adpcm */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
613
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
614
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
615
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
616 /*****************************************************************************
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
617 * Everything else... *
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
618 *****************************************************************************/
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
619
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
620 static int WAV_init(void)
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
621 {
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
622 return(1); /* always succeeds. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
623 } /* WAV_init */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
624
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
625
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
626 static void WAV_quit(void)
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
627 {
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
628 /* it's a no-op. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
629 } /* WAV_quit */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
630
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
631
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
632 static int read_fmt(SDL_RWops *rw, fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
633 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
634 /* if it's in this switch statement, we support the format. */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
635 switch (fmt->wFormatTag)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
636 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
637 case FMT_NORMAL:
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
638 SNDDBG(("WAV: Appears to be uncompressed audio.\n"));
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
639 return(read_fmt_normal(rw, fmt));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
640
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
641 case FMT_ADPCM:
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
642 SNDDBG(("WAV: Appears to be ADPCM compressed audio.\n"));
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
643 return(read_fmt_adpcm(rw, fmt));
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
644
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
645 /* add other types here. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
646
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
647 default:
193
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
648 SNDDBG(("WAV: Format 0x%X is unknown.\n",
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
649 (unsigned int) fmt->wFormatTag));
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
650 BAIL_MACRO("WAV: Unsupported format", 0);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
651 } /* switch */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
652
178
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
653 assert(0); /* shouldn't hit this point. */
bdbe09014724 Minor tweaks and such.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
654 return(0);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
655 } /* read_fmt */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
656
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
657
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
658 /*
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
659 * Locate a specific chunk in the WAVE file by ID...
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
660 */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
661 static int find_chunk(SDL_RWops *rw, Uint32 id)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
662 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
663 Sint32 siz = 0;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
664 Uint32 _id = 0;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
665 Uint32 pos = SDL_RWtell(rw);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
666
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
667 while (1)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
668 {
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
669 BAIL_IF_MACRO(!read_le32(rw, &_id), NULL, 0);
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
670 if (_id == id)
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
671 return(1);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
672
183
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
673 /* skip ahead and see what next chunk is... */
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
674 BAIL_IF_MACRO(!read_le32(rw, &siz), NULL, 0);
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
675 assert(siz >= 0);
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
676 pos += (sizeof (Uint32) * 2) + siz;
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
677 if (siz > 0)
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
678 BAIL_IF_MACRO(SDL_RWseek(rw, pos, SEEK_SET) != pos, NULL, 0);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
679 } /* while */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
680
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
681 return(0); /* shouldn't hit this, but just in case... */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
682 } /* find_chunk */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
683
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
684
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
685 static int WAV_open_internal(Sound_Sample *sample, const char *ext, fmt_t *fmt)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
686 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
687 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
688 SDL_RWops *rw = internal->rw;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
689 data_t d;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
690 wav_t *w;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
691 Uint32 pos;
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
692
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
693 BAIL_IF_MACRO(SDL_ReadLE32(rw) != riffID, "WAV: Not a RIFF file.", 0);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
694 SDL_ReadLE32(rw); /* throw the length away; we get this info later. */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
695 BAIL_IF_MACRO(SDL_ReadLE32(rw) != waveID, "WAV: Not a WAVE file.", 0);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
696 BAIL_IF_MACRO(!find_chunk(rw, fmtID), "WAV: No format chunk.", 0);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
697 BAIL_IF_MACRO(!read_fmt_chunk(rw, fmt), "WAV: Can't read format chunk.", 0);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
698
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
699 sample->actual.channels = (Uint8) fmt->wChannels;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
700 sample->actual.rate = fmt->dwSamplesPerSec;
193
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
701 if ((fmt->wBitsPerSample == 4) /*|| (fmt->wBitsPerSample == 0) */ )
351
069ce624d6cf FIXME cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 333
diff changeset
702 sample->actual.format = AUDIO_S16SYS;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
703 else if (fmt->wBitsPerSample == 8)
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
704 sample->actual.format = AUDIO_U8;
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
705 else if (fmt->wBitsPerSample == 16)
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
706 sample->actual.format = AUDIO_S16LSB;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
707 else
193
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
708 {
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
709 SNDDBG(("WAV: %d bits per sample!?\n", (int) fmt->wBitsPerSample));
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
710 BAIL_MACRO("WAV: Unsupported sample size.", 0);
193
6cd07211a235 Added some debugging output in preparation for future codecs (gsm, maybe?)
Ryan C. Gordon <icculus@icculus.org>
parents: 185
diff changeset
711 } /* else */
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
712
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
713 BAIL_IF_MACRO(!read_fmt(rw, fmt), NULL, 0);
364
4bcbc442d145 Fix to handle strange WAV fmt chunks.
Ryan C. Gordon <icculus@icculus.org>
parents: 351
diff changeset
714 SDL_RWseek(rw, fmt->next_chunk_offset, SEEK_SET);
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
715 BAIL_IF_MACRO(!find_chunk(rw, dataID), "WAV: No data chunk.", 0);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
716 BAIL_IF_MACRO(!read_data_chunk(rw, &d), "WAV: Can't read data chunk.", 0);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
717
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
718 w = (wav_t *) malloc(sizeof(wav_t));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
719 BAIL_IF_MACRO(w == NULL, ERR_OUT_OF_MEMORY, 0);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
720 w->fmt = fmt;
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
721 fmt->total_bytes = w->bytesLeft = d.chunkSize;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
722 fmt->data_starting_offset = SDL_RWtell(rw);
185
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
723 fmt->sample_frame_size = ( ((sample->actual.format & 0xFF) / 8) *
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
724 sample->actual.channels );
6bb68b3bdcf1 ADPCM decoder seems to be complete, other fixes too...
Ryan C. Gordon <icculus@icculus.org>
parents: 183
diff changeset
725
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
726 internal->decoder_private = (void *) w;
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>
parents: 106
diff changeset
728 sample->flags = SOUND_SAMPLEFLAG_NONE;
333
565ae12fa74e Implemented seek support for ADPCM-compressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 307
diff changeset
729 if (fmt->seek_sample != NULL)
307
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
730 sample->flags |= SOUND_SAMPLEFLAG_CANSEEK;
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
731
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
732 SNDDBG(("WAV: Accepting data stream.\n"));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
733 return(1); /* we'll handle this data. */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
734 } /* WAV_open_internal */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
735
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
736
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
737 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
738 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
739 int rc;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
740
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
741 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
742 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
743 memset(fmt, '\0', sizeof (fmt_t));
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
744
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
745 rc = WAV_open_internal(sample, ext, fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
746 if (!rc)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
747 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
748 if (fmt->free != NULL)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
749 fmt->free(fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
750 free(fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
751 } /* if */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
752
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
753 return(rc);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
754 } /* WAV_open */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
755
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
756
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
757 static void WAV_close(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
758 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
759 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
760 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
761
26996236d790 Updated comments to reflect change from LICENSE to COPYING file, and put a
Ryan C. Gordon <icculus@icculus.org>
parents: 178
diff changeset
762 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
763 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
764
124
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
765 free(w->fmt);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
766 free(w);
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
767 } /* WAV_close */
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
768
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
769
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
770 static Uint32 WAV_read(Sound_Sample *sample)
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
771 {
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
772 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
773 wav_t *w = (wav_t *) internal->decoder_private;
e46e31fdecfd Restructured to handle multiple formats.
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
774 return(w->fmt->read_sample(sample));
17
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
775 } /* WAV_read */
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
776
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
777
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
778 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
779 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
780 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
781 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
782 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
783 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
784 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
785 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
786 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
787 } /* WAV_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 193
diff changeset
788
306
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 246
diff changeset
789
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 246
diff changeset
790 static int WAV_seek(Sound_Sample *sample, Uint32 ms)
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 246
diff changeset
791 {
307
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
792 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
793 wav_t *w = (wav_t *) internal->decoder_private;
eb7c929193dd Added seek support for uncompressed WAVs.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
794 return(w->fmt->seek_sample(sample, ms));
306
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 246
diff changeset
795 } /* WAV_seek */
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 246
diff changeset
796
64
40006625142a Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents: 62
diff changeset
797 #endif /* SOUND_SUPPORTS_WAV */
17
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
798
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
799 /* end of wav.c ... */
102cf61c0816 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
800