Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 216:07d0939d40e7
Support for .AU files added.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 13 Jan 2002 19:51:14 +0000 |
| parents | e63b9393f6ce |
| children | ca3483f4cfec |
| rev | line source |
|---|---|
| 4 | 1 /* |
| 2 * SDL_sound -- An abstract sound format decoding API. | |
| 3 * Copyright (C) 2001 Ryan C. Gordon. | |
| 4 * | |
| 5 * This library is free software; you can redistribute it and/or | |
| 6 * modify it under the terms of the GNU Lesser General Public | |
| 7 * License as published by the Free Software Foundation; either | |
| 8 * version 2.1 of the License, or (at your option) any later version. | |
| 9 * | |
| 10 * This library is distributed in the hope that it will be useful, | |
| 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 * Lesser General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU Lesser General Public | |
| 16 * License along with this library; if not, write to the Free Software | |
| 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 */ | |
| 19 | |
| 20 /** | |
| 21 * This file implements the core API, which is relatively simple. | |
| 22 * The real meat of SDL_sound is in the decoders directory. | |
| 23 * | |
| 24 * Documentation is in SDL_sound.h ... It's verbose, honest. :) | |
| 25 * | |
|
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26 * Please see the file COPYING in the source's root directory. |
| 4 | 27 * |
| 28 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org) | |
| 29 */ | |
| 30 | |
|
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31 #if HAVE_CONFIG_H |
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32 # include <config.h> |
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33 #endif |
| 4 | 34 |
| 35 #include <stdio.h> | |
| 36 #include <stdlib.h> | |
| 37 #include <string.h> | |
| 38 #include <assert.h> | |
| 39 #include <ctype.h> | |
| 40 | |
| 41 #include "SDL.h" | |
| 42 #include "SDL_sound.h" | |
| 43 | |
| 44 #define __SDL_SOUND_INTERNAL__ | |
| 45 #include "SDL_sound_internal.h" | |
| 46 | |
| 47 | |
| 48 /* The various decoder drivers... */ | |
| 49 | |
|
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50 #if (defined SOUND_SUPPORTS_MP3) |
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51 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MP3; |
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52 #endif |
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53 |
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54 #if (defined SOUND_SUPPORTS_MIKMOD) |
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55 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIKMOD; |
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56 #endif |
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57 |
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58 #if (defined SOUND_SUPPORTS_MODPLUG) |
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59 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG; |
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60 #endif |
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61 |
| 20 | 62 #if (defined SOUND_SUPPORTS_WAV) |
| 63 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
| 64 #endif | |
| 65 | |
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66 #if (defined SOUND_SUPPORTS_AIFF) |
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67 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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68 #endif |
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69 |
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70 #if (defined SOUND_SUPPORTS_AU) |
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71 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AU; |
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72 #endif |
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73 |
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74 #if (defined SOUND_SUPPORTS_OGG) |
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75 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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76 #endif |
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77 |
| 4 | 78 #if (defined SOUND_SUPPORTS_VOC) |
| 79 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
| 80 #endif | |
| 81 | |
| 82 #if (defined SOUND_SUPPORTS_RAW) | |
| 83 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
| 84 #endif | |
| 85 | |
| 102 | 86 #if (defined SOUND_SUPPORTS_SHN) |
| 87 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN; | |
| 88 #endif | |
| 89 | |
| 110 | 90 #if (defined SOUND_SUPPORTS_MIDI) |
| 91 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIDI; | |
| 92 #endif | |
| 93 | |
| 157 | 94 #if (defined SOUND_SUPPORTS_FLAC) |
| 95 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC; | |
| 96 #endif | |
| 97 | |
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98 |
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99 |
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100 typedef struct |
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101 { |
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102 int available; |
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103 const Sound_DecoderFunctions *funcs; |
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104 } decoder_element; |
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105 |
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106 static decoder_element decoders[] = |
| 4 | 107 { |
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108 #if (defined SOUND_SUPPORTS_MP3) |
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109 { 0, &__Sound_DecoderFunctions_MP3 }, |
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110 #endif |
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111 |
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112 #if (defined SOUND_SUPPORTS_MIKMOD) |
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113 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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114 #endif |
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115 |
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116 #if (defined SOUND_SUPPORTS_MODPLUG) |
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117 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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118 #endif |
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119 |
| 20 | 120 #if (defined SOUND_SUPPORTS_WAV) |
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121 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 122 #endif |
| 123 | |
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124 #if (defined SOUND_SUPPORTS_AIFF) |
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125 { 0, &__Sound_DecoderFunctions_AIFF }, |
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126 #endif |
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127 |
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128 #if (defined SOUND_SUPPORTS_AU) |
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129 { 0, &__Sound_DecoderFunctions_AU }, |
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130 #endif |
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131 |
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132 #if (defined SOUND_SUPPORTS_OGG) |
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133 { 0, &__Sound_DecoderFunctions_OGG }, |
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134 #endif |
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135 |
| 4 | 136 #if (defined SOUND_SUPPORTS_VOC) |
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137 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 138 #endif |
| 139 | |
| 140 #if (defined SOUND_SUPPORTS_RAW) | |
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141 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 142 #endif |
| 102 | 143 |
| 144 #if (defined SOUND_SUPPORTS_SHN) | |
| 145 { 0, &__Sound_DecoderFunctions_SHN }, | |
| 146 #endif | |
| 110 | 147 |
|
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148 #if (defined SOUND_SUPPORTS_FLAC) |
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149 { 0, &__Sound_DecoderFunctions_FLAC }, |
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150 #endif |
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151 |
| 110 | 152 #if (defined SOUND_SUPPORTS_MIDI) |
| 153 { 0, &__Sound_DecoderFunctions_MIDI }, | |
| 154 #endif | |
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155 |
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156 { 0, NULL } |
| 4 | 157 }; |
| 158 | |
| 159 | |
| 160 | |
| 161 /* General SDL_sound state ... */ | |
| 162 | |
| 163 static int initialized = 0; | |
| 164 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ | |
| 165 static const Sound_DecoderInfo **available_decoders = NULL; | |
| 166 | |
| 167 | |
| 168 /* functions ... */ | |
| 169 | |
| 170 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 171 { | |
| 172 if (ver != NULL) | |
| 173 { | |
| 174 ver->major = SOUND_VER_MAJOR; | |
| 175 ver->minor = SOUND_VER_MINOR; | |
| 176 ver->patch = SOUND_VER_PATCH; | |
| 177 } /* if */ | |
| 178 } /* Sound_GetLinkedVersion */ | |
| 179 | |
| 180 | |
| 181 int Sound_Init(void) | |
| 182 { | |
| 183 size_t i; | |
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184 size_t pos = 0; |
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185 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 186 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
| 187 samplesList = NULL; | |
| 188 | |
| 189 SDL_Init(SDL_INIT_AUDIO); | |
| 190 | |
| 191 available_decoders = (const Sound_DecoderInfo **) | |
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192 malloc((total) * sizeof (Sound_DecoderInfo *)); |
| 4 | 193 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 194 | |
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195 for (i = 0; decoders[i].funcs != NULL; i++) |
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196 { |
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197 decoders[i].available = decoders[i].funcs->init(); |
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198 if (decoders[i].available) |
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199 { |
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200 available_decoders[pos] = &(decoders[i].funcs->info); |
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201 pos++; |
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202 } /* if */ |
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203 } /* for */ |
| 4 | 204 |
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205 available_decoders[pos] = NULL; |
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206 |
| 4 | 207 initialized = 1; |
| 208 return(1); | |
| 209 } /* Sound_Init */ | |
| 210 | |
| 211 | |
| 212 int Sound_Quit(void) | |
| 213 { | |
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214 size_t i; |
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215 |
| 4 | 216 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 217 | |
| 218 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 219 Sound_FreeSample(samplesList); | |
| 220 | |
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221 for (i = 0; decoders[i].funcs != NULL; i++) |
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222 { |
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223 if (decoders[i].available) |
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224 { |
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225 decoders[i].funcs->quit(); |
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226 decoders[i].available = 0; |
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227 } /* if */ |
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228 } /* for */ |
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229 |
| 4 | 230 if (available_decoders != NULL) |
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231 free((void *) available_decoders); |
| 4 | 232 available_decoders = NULL; |
| 233 | |
| 234 initialized = 0; | |
| 235 | |
| 236 return(1); | |
| 237 } /* Sound_Quit */ | |
| 238 | |
| 239 | |
| 240 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 241 { | |
| 242 return(available_decoders); /* READ. ONLY. */ | |
| 243 } /* Sound_AvailableDecoders */ | |
| 244 | |
| 245 | |
| 246 const char *Sound_GetError(void) | |
| 247 { | |
| 248 return(SDL_GetError()); | |
| 249 } /* Sound_GetError */ | |
| 250 | |
| 251 | |
| 252 void Sound_ClearError(void) | |
| 253 { | |
| 254 SDL_ClearError(); | |
| 255 } /* Sound_ClearError */ | |
| 256 | |
| 257 | |
| 258 /* | |
| 259 * This is declared in the internal header. | |
| 260 */ | |
| 261 void Sound_SetError(const char *err) | |
| 262 { | |
|
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263 if (err != NULL) |
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264 { |
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265 SNDDBG(("Sound_SetError(\"%s\");\n", err)); |
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266 SDL_SetError(err); |
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267 } /* if */ |
| 4 | 268 } /* Sound_SetError */ |
| 269 | |
| 270 | |
| 271 /* | |
| 272 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 273 * I honestly don't want to mess around with figuring out if a given | |
| 274 * platform has "strcasecmp", "stricmp", or | |
| 275 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 276 * next release of Carbon. :) This is exported so decoders may use it if | |
| 277 * they like. | |
| 278 */ | |
| 279 int __Sound_strcasecmp(const char *x, const char *y) | |
| 280 { | |
| 281 int ux, uy; | |
| 282 | |
|
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283 if (x == y) /* same pointer? Both NULL? */ |
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284 return(0); |
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285 |
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286 if (x == NULL) |
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287 return(-1); |
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288 |
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289 if (y == NULL) |
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290 return(1); |
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291 |
| 4 | 292 do |
| 293 { | |
| 294 ux = toupper((int) *x); | |
| 295 uy = toupper((int) *y); | |
| 296 if (ux > uy) | |
| 297 return(1); | |
| 298 else if (ux < uy) | |
| 299 return(-1); | |
| 300 x++; | |
| 301 y++; | |
| 302 } while ((ux) && (uy)); | |
| 303 | |
| 304 return(0); | |
| 305 } /* __Sound_strcasecmp */ | |
| 306 | |
| 307 | |
| 308 /* | |
| 309 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 310 * to be filled in later, by a decoder, will be initialized to zero. | |
| 311 */ | |
| 312 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 313 Uint32 bufferSize) | |
| 314 { | |
| 315 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 316 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 317 if ((retval == NULL) || (internal == NULL)) | |
| 318 { | |
| 319 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 320 if (retval) | |
| 321 free(retval); | |
| 322 if (internal) | |
| 323 free(internal); | |
| 324 | |
| 325 return(NULL); | |
| 326 } /* if */ | |
| 327 | |
| 328 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 329 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 330 | |
| 331 assert(bufferSize > 0); | |
| 332 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 333 if (!retval->buffer) | |
| 334 { | |
| 335 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 336 free(internal); | |
| 337 free(retval); | |
| 338 return(NULL); | |
| 339 } /* if */ | |
| 340 memset(retval->buffer, '\0', bufferSize); | |
| 341 retval->buffer_size = bufferSize; | |
| 342 | |
| 343 if (desired != NULL) | |
| 344 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 345 | |
| 346 internal->rw = rw; | |
| 347 retval->opaque = internal; | |
| 348 return(retval); | |
| 349 } /* alloc_sample */ | |
| 350 | |
| 351 | |
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352 #if (defined DEBUG_CHATTER) |
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353 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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354 { |
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355 switch(fmt) |
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356 { |
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357 case AUDIO_U8: |
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358 return("U8"); |
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359 case AUDIO_S8: |
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360 return("S8"); |
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361 case AUDIO_U16LSB: |
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362 return("U16LSB"); |
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363 case AUDIO_S16LSB: |
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364 return("S16LSB"); |
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365 case AUDIO_U16MSB: |
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366 return("U16MSB"); |
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367 case AUDIO_S16MSB: |
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368 return("S16MSB"); |
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369 } /* switch */ |
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370 |
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371 return("Unknown"); |
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372 } /* fmt_to_str */ |
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373 #endif |
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374 |
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375 |
| 4 | 376 /* |
| 377 * The bulk of the Sound_NewSample() work is done here... | |
| 378 * Ask the specified decoder to handle the data in (rw), and if | |
| 379 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 380 * back to where it was, and return false. | |
| 381 * | |
| 382 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 383 */ | |
| 384 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 385 Sound_Sample *sample, const char *ext, | |
| 386 Sound_AudioInfo *_desired) | |
| 387 { | |
| 388 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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389 Sound_AudioInfo desired; |
| 4 | 390 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 391 | |
| 392 /* fill in the funcs for this decoder... */ | |
| 393 sample->decoder = &funcs->info; | |
| 394 internal->funcs = funcs; | |
| 395 if (!funcs->open(sample, ext)) | |
| 396 { | |
| 397 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 398 return(0); | |
| 399 } /* if */ | |
| 400 | |
| 401 /* success; we've got a decoder! */ | |
| 402 | |
| 403 /* Now we need to set up the conversion buffer... */ | |
| 404 | |
| 405 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 406 sizeof (Sound_AudioInfo)); | |
| 407 | |
|
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408 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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409 sample->actual.format, |
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410 sample->actual.channels, |
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411 sample->actual.rate, |
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412 desired.format, |
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413 desired.channels, |
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414 desired.rate) == -1) |
| 4 | 415 { |
| 416 Sound_SetError(SDL_GetError()); | |
| 417 funcs->close(sample); | |
| 418 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 419 return(0); | |
| 420 } /* if */ | |
| 421 | |
| 422 if (internal->sdlcvt.len_mult > 1) | |
| 423 { | |
| 424 void *rc = realloc(sample->buffer, | |
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425 sample->buffer_size * internal->sdlcvt.len_mult); |
| 4 | 426 if (rc == NULL) |
| 427 { | |
| 428 funcs->close(sample); | |
| 429 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 430 return(0); | |
| 431 } /* if */ | |
| 432 | |
| 433 sample->buffer = rc; | |
| 434 } /* if */ | |
| 435 | |
| 436 /* these pointers are all one and the same. */ | |
| 437 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 438 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 439 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 440 internal->sdlcvt.len = internal->buffer_size; | |
| 441 | |
| 442 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 443 if (samplesList != NULL) | |
| 444 { | |
| 445 internal->next = samplesList; | |
| 446 if (samplesList != NULL) | |
| 447 internal->prev = sample; | |
| 448 } /* if */ | |
| 449 samplesList = sample; | |
| 450 | |
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451 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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452 fmt_to_str(sample->desired.format), |
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453 sample->desired.rate, |
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454 sample->desired.channels)); |
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455 |
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456 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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457 fmt_to_str(sample->actual.format), |
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458 sample->actual.rate, |
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459 sample->actual.channels)); |
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460 |
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461 SNDDBG(("On-the-fly conversion: %s.\n", |
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462 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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463 |
| 4 | 464 return(1); |
| 465 } /* init_sample */ | |
| 466 | |
| 467 | |
| 468 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 469 Sound_AudioInfo *desired, Uint32 bSize) | |
| 470 { | |
| 471 Sound_Sample *retval; | |
|
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472 decoder_element *decoder; |
| 4 | 473 |
| 474 /* sanity checks. */ | |
| 475 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 476 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 477 | |
| 478 retval = alloc_sample(rw, desired, bSize); | |
| 479 if (!retval) | |
| 480 return(NULL); /* alloc_sample() sets error message... */ | |
| 481 | |
| 482 if (ext != NULL) | |
| 483 { | |
|
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484 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 485 { |
|
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486 if (decoder->available) |
| 4 | 487 { |
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488 const char **decoderExt = decoder->funcs->info.extensions; |
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489 while (*decoderExt) |
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490 { |
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491 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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492 { |
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493 if (init_sample(decoder->funcs, retval, ext, desired)) |
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494 return(retval); |
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495 } /* if */ |
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496 decoderExt++; |
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497 } /* while */ |
| 4 | 498 } /* if */ |
| 499 } /* for */ | |
| 500 } /* if */ | |
| 501 | |
| 502 /* no direct extension match? Try everything we've got... */ | |
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503 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 504 { |
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505 if (decoder->available) |
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506 { |
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507 if (init_sample(decoder->funcs, retval, ext, desired)) |
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508 return(retval); |
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509 } /* if */ |
| 4 | 510 } /* for */ |
| 511 | |
| 512 /* nothing could handle the sound data... */ | |
| 513 free(retval->opaque); | |
| 514 if (retval->buffer != NULL) | |
| 515 free(retval->buffer); | |
| 516 free(retval); | |
| 517 SDL_RWclose(rw); | |
| 518 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 519 return(NULL); | |
| 520 } /* Sound_NewSample */ | |
| 521 | |
| 522 | |
| 523 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 524 Sound_AudioInfo *desired, | |
| 525 Uint32 bufferSize) | |
| 526 { | |
| 527 const char *ext; | |
| 528 SDL_RWops *rw; | |
| 529 | |
| 530 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 531 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 532 | |
| 533 ext = strrchr(filename, '.'); | |
| 534 rw = SDL_RWFromFile(filename, "rb"); | |
| 535 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 536 | |
| 537 if (ext != NULL) | |
| 538 ext++; | |
| 539 | |
| 540 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 541 } /* Sound_NewSampleFromFile */ | |
| 542 | |
| 543 | |
| 544 void Sound_FreeSample(Sound_Sample *sample) | |
| 545 { | |
| 546 Sound_SampleInternal *internal; | |
| 547 | |
| 548 if (!initialized) | |
| 549 { | |
| 550 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 551 return; | |
| 552 } /* if */ | |
| 553 | |
| 554 if (sample == NULL) | |
| 555 { | |
| 556 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 557 return; | |
| 558 } /* if */ | |
| 559 | |
| 560 internal = (Sound_SampleInternal *) sample->opaque; | |
| 561 | |
| 562 internal->funcs->close(sample); | |
| 563 | |
| 564 /* update the samplesList... */ | |
| 565 if (internal->prev != NULL) | |
| 566 { | |
| 567 Sound_SampleInternal *prevInternal; | |
| 568 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 569 prevInternal->next = internal->next; | |
| 570 } /* if */ | |
| 571 else | |
| 572 { | |
| 573 assert(samplesList == sample); | |
| 574 samplesList = internal->next; | |
| 575 } /* else */ | |
| 576 | |
| 577 if (internal->next != NULL) | |
| 578 { | |
| 579 Sound_SampleInternal *nextInternal; | |
| 580 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 581 nextInternal->prev = internal->prev; | |
| 582 } /* if */ | |
| 583 | |
| 584 /* nuke it... */ | |
| 585 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 586 SDL_RWclose(internal->rw); | |
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587 |
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588 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
| 4 | 589 free(internal->buffer); |
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590 |
| 4 | 591 free(internal); |
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592 |
| 4 | 593 if (sample->buffer != NULL) |
| 594 free(sample->buffer); | |
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595 |
| 4 | 596 free(sample); |
| 597 } /* Sound_FreeSample */ | |
| 598 | |
| 599 | |
| 600 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 601 { | |
| 602 void *newBuf = NULL; | |
| 603 Sound_SampleInternal *internal = NULL; | |
| 604 | |
| 605 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 606 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 607 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 608 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 609 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 610 | |
| 611 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 612 sample->buffer_size = newSize; | |
| 613 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 614 internal->sdlcvt.len = internal->buffer_size; | |
| 615 | |
| 616 return(1); | |
| 617 } /* Sound_SetBufferSize */ | |
| 618 | |
| 619 | |
| 620 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 621 { | |
| 622 Sound_SampleInternal *internal = NULL; | |
| 623 Uint32 retval = 0; | |
| 624 | |
| 625 /* a boatload of sanity checks... */ | |
| 626 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 627 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 628 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 629 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 630 | |
| 631 internal = (Sound_SampleInternal *) sample->opaque; | |
| 632 | |
| 633 assert(sample->buffer != NULL); | |
| 634 assert(sample->buffer_size > 0); | |
| 635 assert(internal->buffer != NULL); | |
| 636 assert(internal->buffer_size > 0); | |
| 637 | |
| 638 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 639 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 640 retval = internal->funcs->read(sample); | |
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641 |
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642 if (retval > 0 && internal->sdlcvt.needed) |
| 4 | 643 { |
| 644 internal->sdlcvt.len = retval; | |
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645 Sound_ConvertAudio(&internal->sdlcvt); |
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646 retval = internal->sdlcvt.len_cvt; |
| 4 | 647 } /* if */ |
| 648 | |
| 649 return(retval); | |
| 650 } /* Sound_Decode */ | |
| 651 | |
| 652 | |
| 653 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 654 { | |
| 655 Sound_SampleInternal *internal = NULL; | |
| 656 void *buf = NULL; | |
| 657 Uint32 newBufSize = 0; | |
| 658 | |
| 659 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
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660 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
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661 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
| 4 | 662 |
| 663 internal = (Sound_SampleInternal *) sample->opaque; | |
| 664 | |
| 665 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 666 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 667 { | |
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668 Uint32 br = Sound_Decode(sample); |
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669 void *ptr = realloc(buf, newBufSize + br); |
| 4 | 670 if (ptr == NULL) |
| 671 { | |
| 672 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 673 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 674 } /* if */ | |
| 675 else | |
| 676 { | |
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677 buf = ptr; |
| 4 | 678 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
| 679 newBufSize += br; | |
| 680 } /* else */ | |
| 681 } /* while */ | |
| 682 | |
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683 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
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684 return(sample->buffer_size); |
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685 |
|
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686 if (internal->buffer != sample->buffer) |
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687 free(internal->buffer); |
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688 |
| 4 | 689 free(sample->buffer); |
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690 |
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691 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
| 4 | 692 sample->buffer_size = newBufSize; |
| 693 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
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694 internal->sdlcvt.len = internal->buffer_size; |
| 4 | 695 |
| 696 return(newBufSize); | |
| 697 } /* Sound_DecodeAll */ | |
| 698 | |
| 699 /* end of SDL_sound.c ... */ | |
| 700 |