Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 26:ddc3614c9042
Bugfix (thanks Tsuyoshi Iguchi!), and Ogg Vorbis decoder entry.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 19 Sep 2001 14:33:06 +0000 |
| parents | d4ac6ce1360e |
| children | f27bcbcaeab1 |
| 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 * | |
| 26 * Please see the file LICENSE in the source's root directory. | |
| 27 * | |
| 28 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org) | |
| 29 */ | |
| 30 | |
| 31 | |
| 32 #include <stdio.h> | |
| 33 #include <stdlib.h> | |
| 34 #include <string.h> | |
| 35 #include <assert.h> | |
| 36 #include <ctype.h> | |
| 37 | |
| 38 #include "SDL.h" | |
| 39 #include "SDL_sound.h" | |
| 40 | |
| 41 #define __SDL_SOUND_INTERNAL__ | |
| 42 #include "SDL_sound_internal.h" | |
| 43 | |
| 44 | |
| 45 /* The various decoder drivers... */ | |
| 46 | |
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47 #if (defined SOUND_SUPPORTS_MP3) |
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48 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MP3; |
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49 #endif |
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50 |
| 20 | 51 #if (defined SOUND_SUPPORTS_WAV) |
| 52 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
| 53 #endif | |
| 54 | |
|
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55 #if (defined SOUND_SUPPORTS_OGG) |
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56 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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57 #endif |
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58 |
| 4 | 59 #if (defined SOUND_SUPPORTS_VOC) |
| 60 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
| 61 #endif | |
| 62 | |
| 63 #if (defined SOUND_SUPPORTS_RAW) | |
| 64 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
| 65 #endif | |
| 66 | |
| 67 static const Sound_DecoderFunctions *decoderFuncs[] = | |
| 68 { | |
|
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69 #if (defined SOUND_SUPPORTS_MP3) |
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70 &__Sound_DecoderFunctions_MP3, |
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71 #endif |
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72 |
| 20 | 73 #if (defined SOUND_SUPPORTS_WAV) |
| 74 &__Sound_DecoderFunctions_WAV, | |
| 75 #endif | |
| 76 | |
|
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77 #if (defined SOUND_SUPPORTS_OGG) |
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78 &__Sound_DecoderFunctions_OGG, |
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79 #endif |
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80 |
| 4 | 81 #if (defined SOUND_SUPPORTS_VOC) |
| 82 &__Sound_DecoderFunctions_VOC, | |
| 83 #endif | |
| 84 | |
| 85 #if (defined SOUND_SUPPORTS_RAW) | |
| 86 &__Sound_DecoderFunctions_RAW, | |
| 87 #endif | |
| 88 | |
| 89 NULL | |
| 90 }; | |
| 91 | |
| 92 | |
| 93 | |
| 94 /* General SDL_sound state ... */ | |
| 95 | |
| 96 static int initialized = 0; | |
| 97 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ | |
| 98 static const Sound_DecoderInfo **available_decoders = NULL; | |
| 99 | |
| 100 | |
| 101 /* functions ... */ | |
| 102 | |
| 103 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 104 { | |
| 105 if (ver != NULL) | |
| 106 { | |
| 107 ver->major = SOUND_VER_MAJOR; | |
| 108 ver->minor = SOUND_VER_MINOR; | |
| 109 ver->patch = SOUND_VER_PATCH; | |
| 110 } /* if */ | |
| 111 } /* Sound_GetLinkedVersion */ | |
| 112 | |
| 113 | |
| 114 int Sound_Init(void) | |
| 115 { | |
| 116 size_t i; | |
| 117 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); | |
| 118 samplesList = NULL; | |
| 119 | |
| 120 SDL_Init(SDL_INIT_AUDIO); | |
| 121 | |
| 122 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 123 ; /* do nothing. */ | |
| 124 | |
| 125 available_decoders = (const Sound_DecoderInfo **) | |
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126 malloc((i + 1) * sizeof (Sound_DecoderInfo *)); |
| 4 | 127 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 128 | |
| 129 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 130 available_decoders[i] = &decoderFuncs[i]->info; | |
| 131 | |
|
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132 available_decoders[i] = NULL; |
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133 |
| 4 | 134 initialized = 1; |
| 135 return(1); | |
| 136 } /* Sound_Init */ | |
| 137 | |
| 138 | |
| 139 int Sound_Quit(void) | |
| 140 { | |
| 141 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 142 | |
| 143 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 144 Sound_FreeSample(samplesList); | |
| 145 | |
| 146 if (available_decoders != NULL) | |
| 147 free(available_decoders); | |
| 148 available_decoders = NULL; | |
| 149 | |
| 150 initialized = 0; | |
| 151 | |
| 152 return(1); | |
| 153 } /* Sound_Quit */ | |
| 154 | |
| 155 | |
| 156 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 157 { | |
| 158 return(available_decoders); /* READ. ONLY. */ | |
| 159 } /* Sound_AvailableDecoders */ | |
| 160 | |
| 161 | |
| 162 const char *Sound_GetError(void) | |
| 163 { | |
| 164 return(SDL_GetError()); | |
| 165 } /* Sound_GetError */ | |
| 166 | |
| 167 | |
| 168 void Sound_ClearError(void) | |
| 169 { | |
| 170 SDL_ClearError(); | |
| 171 } /* Sound_ClearError */ | |
| 172 | |
| 173 | |
| 174 /* | |
| 175 * This is declared in the internal header. | |
| 176 */ | |
| 177 void Sound_SetError(const char *err) | |
| 178 { | |
| 179 if (err != NULL) | |
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180 { |
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181 _D(("Sound_SetError(\"%s\");\n", err)); |
| 4 | 182 SDL_SetError(err); |
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183 } /* if */ |
| 4 | 184 } /* Sound_SetError */ |
| 185 | |
| 186 | |
| 187 /* | |
| 188 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 189 * I honestly don't want to mess around with figuring out if a given | |
| 190 * platform has "strcasecmp", "stricmp", or | |
| 191 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 192 * next release of Carbon. :) This is exported so decoders may use it if | |
| 193 * they like. | |
| 194 */ | |
| 195 int __Sound_strcasecmp(const char *x, const char *y) | |
| 196 { | |
| 197 int ux, uy; | |
| 198 | |
| 199 do | |
| 200 { | |
| 201 ux = toupper((int) *x); | |
| 202 uy = toupper((int) *y); | |
| 203 if (ux > uy) | |
| 204 return(1); | |
| 205 else if (ux < uy) | |
| 206 return(-1); | |
| 207 x++; | |
| 208 y++; | |
| 209 } while ((ux) && (uy)); | |
| 210 | |
| 211 return(0); | |
| 212 } /* __Sound_strcasecmp */ | |
| 213 | |
| 214 | |
| 215 /* | |
| 216 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 217 * to be filled in later, by a decoder, will be initialized to zero. | |
| 218 */ | |
| 219 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 220 Uint32 bufferSize) | |
| 221 { | |
| 222 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 223 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 224 if ((retval == NULL) || (internal == NULL)) | |
| 225 { | |
| 226 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 227 if (retval) | |
| 228 free(retval); | |
| 229 if (internal) | |
| 230 free(internal); | |
| 231 | |
| 232 return(NULL); | |
| 233 } /* if */ | |
| 234 | |
| 235 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 236 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 237 | |
| 238 assert(bufferSize > 0); | |
| 239 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 240 if (!retval->buffer) | |
| 241 { | |
| 242 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 243 free(internal); | |
| 244 free(retval); | |
| 245 return(NULL); | |
| 246 } /* if */ | |
| 247 memset(retval->buffer, '\0', bufferSize); | |
| 248 retval->buffer_size = bufferSize; | |
| 249 | |
| 250 if (desired != NULL) | |
| 251 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 252 | |
| 253 internal->rw = rw; | |
| 254 retval->opaque = internal; | |
| 255 return(retval); | |
| 256 } /* alloc_sample */ | |
| 257 | |
| 258 | |
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259 #if (defined DEBUG_CHATTER) |
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260 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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261 { |
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262 switch(fmt) |
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263 { |
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264 case AUDIO_U8: |
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265 return("U8"); |
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266 case AUDIO_S8: |
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267 return("S8"); |
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268 case AUDIO_U16LSB: |
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269 return("U16LSB"); |
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270 case AUDIO_S16LSB: |
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271 return("S16LSB"); |
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272 case AUDIO_U16MSB: |
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273 return("U16MSB"); |
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274 case AUDIO_S16MSB: |
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275 return("S16MSB"); |
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276 } /* switch */ |
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277 |
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278 return("Unknown"); |
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279 } /* fmt_to_str */ |
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280 #endif |
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281 |
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282 |
| 4 | 283 /* |
| 284 * The bulk of the Sound_NewSample() work is done here... | |
| 285 * Ask the specified decoder to handle the data in (rw), and if | |
| 286 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 287 * back to where it was, and return false. | |
| 288 * | |
| 289 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 290 */ | |
| 291 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 292 Sound_Sample *sample, const char *ext, | |
| 293 Sound_AudioInfo *_desired) | |
| 294 { | |
| 295 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 296 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ | |
| 297 Sound_AudioInfo desired; | |
| 298 | |
| 299 /* fill in the funcs for this decoder... */ | |
| 300 sample->decoder = &funcs->info; | |
| 301 internal->funcs = funcs; | |
| 302 if (!funcs->open(sample, ext)) | |
| 303 { | |
| 304 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 305 return(0); | |
| 306 } /* if */ | |
| 307 | |
| 308 /* success; we've got a decoder! */ | |
| 309 | |
| 310 /* Now we need to set up the conversion buffer... */ | |
| 311 | |
| 312 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 313 sizeof (Sound_AudioInfo)); | |
| 314 | |
| 315 if (SDL_BuildAudioCVT(&internal->sdlcvt, | |
| 316 sample->actual.format, | |
| 317 sample->actual.channels, | |
| 318 (int) sample->actual.rate, /* !!! FIXME: Int? Really? */ | |
| 319 desired.format, | |
| 320 desired.channels, | |
| 321 (int) desired.rate) == -1) /* !!! FIXME: Int? Really? */ | |
| 322 { | |
| 323 Sound_SetError(SDL_GetError()); | |
| 324 funcs->close(sample); | |
| 325 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 326 return(0); | |
| 327 } /* if */ | |
| 328 | |
| 329 if (internal->sdlcvt.len_mult > 1) | |
| 330 { | |
| 331 void *rc = realloc(sample->buffer, | |
| 332 sample->buffer_size * internal->sdlcvt.len_mult); | |
| 333 if (rc == NULL) | |
| 334 { | |
| 335 funcs->close(sample); | |
| 336 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 337 return(0); | |
| 338 } /* if */ | |
| 339 | |
| 340 sample->buffer = rc; | |
| 341 } /* if */ | |
| 342 | |
| 343 /* these pointers are all one and the same. */ | |
| 344 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 345 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 346 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 347 internal->sdlcvt.len = internal->buffer_size; | |
| 348 | |
| 349 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 350 if (samplesList != NULL) | |
| 351 { | |
| 352 internal->next = samplesList; | |
| 353 if (samplesList != NULL) | |
| 354 internal->prev = sample; | |
| 355 } /* if */ | |
| 356 samplesList = sample; | |
| 357 | |
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358 _D(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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359 fmt_to_str(sample->desired.format), |
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360 sample->desired.rate, |
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361 sample->desired.channels)); |
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362 |
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363 _D(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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364 fmt_to_str(sample->actual.format), |
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365 sample->actual.rate, |
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Ryan C. Gordon <icculus@icculus.org>
parents:
4
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changeset
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366 sample->actual.channels)); |
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cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
367 |
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cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
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368 _D(("On-the-fly conversion: %s.\n", |
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cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
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369 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
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370 |
| 4 | 371 return(1); |
| 372 } /* init_sample */ | |
| 373 | |
| 374 | |
| 375 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 376 Sound_AudioInfo *desired, Uint32 bSize) | |
| 377 { | |
| 378 size_t i; | |
| 379 Sound_Sample *retval; | |
| 380 | |
| 381 /* sanity checks. */ | |
| 382 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 383 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 384 | |
| 385 retval = alloc_sample(rw, desired, bSize); | |
| 386 if (!retval) | |
| 387 return(NULL); /* alloc_sample() sets error message... */ | |
| 388 | |
| 389 if (ext != NULL) | |
| 390 { | |
| 391 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 392 { | |
| 393 const char *decoderExt = decoderFuncs[i]->info.extension; | |
| 394 if (__Sound_strcasecmp(decoderExt, ext) == 0) | |
| 395 { | |
| 396 if (init_sample(decoderFuncs[i], retval, ext, desired)) | |
| 397 return(retval); | |
| 398 } /* if */ | |
| 399 } /* for */ | |
| 400 } /* if */ | |
| 401 | |
| 402 /* no direct extension match? Try everything we've got... */ | |
| 403 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 404 { | |
| 405 if (init_sample(decoderFuncs[i], retval, ext, desired)) | |
| 406 return(retval); | |
| 407 } /* for */ | |
| 408 | |
| 409 /* nothing could handle the sound data... */ | |
| 410 free(retval->opaque); | |
| 411 if (retval->buffer != NULL) | |
| 412 free(retval->buffer); | |
| 413 free(retval); | |
| 414 SDL_RWclose(rw); | |
| 415 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 416 return(NULL); | |
| 417 } /* Sound_NewSample */ | |
| 418 | |
| 419 | |
| 420 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 421 Sound_AudioInfo *desired, | |
| 422 Uint32 bufferSize) | |
| 423 { | |
| 424 const char *ext; | |
| 425 SDL_RWops *rw; | |
| 426 | |
| 427 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 428 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 429 | |
| 430 ext = strrchr(filename, '.'); | |
| 431 rw = SDL_RWFromFile(filename, "rb"); | |
| 432 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 433 | |
| 434 if (ext != NULL) | |
| 435 ext++; | |
| 436 | |
| 437 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 438 } /* Sound_NewSampleFromFile */ | |
| 439 | |
| 440 | |
| 441 void Sound_FreeSample(Sound_Sample *sample) | |
| 442 { | |
| 443 Sound_SampleInternal *internal; | |
| 444 | |
| 445 if (!initialized) | |
| 446 { | |
| 447 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 448 return; | |
| 449 } /* if */ | |
| 450 | |
| 451 if (sample == NULL) | |
| 452 { | |
| 453 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 454 return; | |
| 455 } /* if */ | |
| 456 | |
| 457 internal = (Sound_SampleInternal *) sample->opaque; | |
| 458 | |
| 459 internal->funcs->close(sample); | |
| 460 | |
| 461 /* update the samplesList... */ | |
| 462 if (internal->prev != NULL) | |
| 463 { | |
| 464 Sound_SampleInternal *prevInternal; | |
| 465 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 466 prevInternal->next = internal->next; | |
| 467 } /* if */ | |
| 468 else | |
| 469 { | |
| 470 assert(samplesList == sample); | |
| 471 samplesList = internal->next; | |
| 472 } /* else */ | |
| 473 | |
| 474 if (internal->next != NULL) | |
| 475 { | |
| 476 Sound_SampleInternal *nextInternal; | |
| 477 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 478 nextInternal->prev = internal->prev; | |
| 479 } /* if */ | |
| 480 | |
| 481 /* nuke it... */ | |
| 482 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 483 SDL_RWclose(internal->rw); | |
| 484 assert(internal->buffer != NULL); | |
| 485 if (internal->buffer != sample->buffer) | |
| 486 free(internal->buffer); | |
| 487 free(internal); | |
| 488 if (sample->buffer != NULL) | |
| 489 free(sample->buffer); | |
| 490 free(sample); | |
| 491 } /* Sound_FreeSample */ | |
| 492 | |
| 493 | |
| 494 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 495 { | |
| 496 void *newBuf = NULL; | |
| 497 Sound_SampleInternal *internal = NULL; | |
| 498 | |
| 499 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 500 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 501 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 502 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 503 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 504 | |
| 505 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 506 sample->buffer_size = newSize; | |
| 507 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 508 internal->sdlcvt.len = internal->buffer_size; | |
| 509 | |
| 510 return(1); | |
| 511 } /* Sound_SetBufferSize */ | |
| 512 | |
| 513 | |
| 514 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 515 { | |
| 516 Sound_SampleInternal *internal = NULL; | |
| 517 Uint32 retval = 0; | |
| 518 | |
| 519 /* a boatload of sanity checks... */ | |
| 520 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 521 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 522 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 523 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 524 | |
| 525 internal = (Sound_SampleInternal *) sample->opaque; | |
| 526 | |
| 527 assert(sample->buffer != NULL); | |
| 528 assert(sample->buffer_size > 0); | |
| 529 assert(internal->buffer != NULL); | |
| 530 assert(internal->buffer_size > 0); | |
| 531 | |
| 532 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 533 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 534 | |
| 535 retval = internal->funcs->read(sample); | |
| 536 if (internal->sdlcvt.needed) | |
| 537 { | |
| 538 internal->sdlcvt.len = retval; | |
| 539 SDL_ConvertAudio(&internal->sdlcvt); | |
| 540 retval *= internal->sdlcvt.len_mult; | |
| 541 } /* if */ | |
| 542 | |
| 543 return(retval); | |
| 544 } /* Sound_Decode */ | |
| 545 | |
| 546 | |
| 547 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 548 { | |
| 549 Sound_SampleInternal *internal = NULL; | |
| 550 void *buf = NULL; | |
| 551 Uint32 newBufSize = 0; | |
| 552 | |
| 553 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 554 | |
| 555 internal = (Sound_SampleInternal *) sample->opaque; | |
| 556 | |
| 557 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 558 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 559 { | |
| 560 void *ptr = realloc(buf, newBufSize + sample->buffer_size); | |
| 561 if (ptr == NULL) | |
| 562 { | |
| 563 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 564 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 565 } /* if */ | |
| 566 else | |
| 567 { | |
| 568 Uint32 br = Sound_Decode(sample); | |
| 569 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); | |
| 570 newBufSize += br; | |
| 571 } /* else */ | |
| 572 } /* while */ | |
| 573 | |
| 574 free(sample->buffer); | |
| 575 sample->buffer = internal->buffer = internal->sdlcvt.buf = buf; | |
| 576 sample->buffer_size = newBufSize; | |
| 577 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
| 578 internal->sdlcvt.len_mult = internal->buffer_size; | |
| 579 | |
| 580 return(newBufSize); | |
| 581 } /* Sound_DecodeAll */ | |
| 582 | |
| 583 | |
| 584 /* end of SDL_sound.c ... */ | |
| 585 |