Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 38:9950943545c4
Updated.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 20 Sep 2001 07:56:52 +0000 |
| parents | f27bcbcaeab1 |
| children | c4b8c39a9798 |
| 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_AIFF) |
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56 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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57 #endif |
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58 |
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59 #if (defined SOUND_SUPPORTS_OGG) |
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60 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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61 #endif |
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62 |
| 4 | 63 #if (defined SOUND_SUPPORTS_VOC) |
| 64 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
| 65 #endif | |
| 66 | |
| 67 #if (defined SOUND_SUPPORTS_RAW) | |
| 68 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
| 69 #endif | |
| 70 | |
| 71 static const Sound_DecoderFunctions *decoderFuncs[] = | |
| 72 { | |
|
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73 #if (defined SOUND_SUPPORTS_MP3) |
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74 &__Sound_DecoderFunctions_MP3, |
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75 #endif |
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76 |
| 20 | 77 #if (defined SOUND_SUPPORTS_WAV) |
| 78 &__Sound_DecoderFunctions_WAV, | |
| 79 #endif | |
| 80 | |
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81 #if (defined SOUND_SUPPORTS_AIFF) |
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82 &__Sound_DecoderFunctions_AIFF, |
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83 #endif |
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84 |
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85 #if (defined SOUND_SUPPORTS_OGG) |
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86 &__Sound_DecoderFunctions_OGG, |
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87 #endif |
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88 |
| 4 | 89 #if (defined SOUND_SUPPORTS_VOC) |
| 90 &__Sound_DecoderFunctions_VOC, | |
| 91 #endif | |
| 92 | |
| 93 #if (defined SOUND_SUPPORTS_RAW) | |
| 94 &__Sound_DecoderFunctions_RAW, | |
| 95 #endif | |
| 96 | |
| 97 NULL | |
| 98 }; | |
| 99 | |
| 100 | |
| 101 | |
| 102 /* General SDL_sound state ... */ | |
| 103 | |
| 104 static int initialized = 0; | |
| 105 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ | |
| 106 static const Sound_DecoderInfo **available_decoders = NULL; | |
| 107 | |
| 108 | |
| 109 /* functions ... */ | |
| 110 | |
| 111 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 112 { | |
| 113 if (ver != NULL) | |
| 114 { | |
| 115 ver->major = SOUND_VER_MAJOR; | |
| 116 ver->minor = SOUND_VER_MINOR; | |
| 117 ver->patch = SOUND_VER_PATCH; | |
| 118 } /* if */ | |
| 119 } /* Sound_GetLinkedVersion */ | |
| 120 | |
| 121 | |
| 122 int Sound_Init(void) | |
| 123 { | |
| 124 size_t i; | |
| 125 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); | |
| 126 samplesList = NULL; | |
| 127 | |
| 128 SDL_Init(SDL_INIT_AUDIO); | |
| 129 | |
| 130 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 131 ; /* do nothing. */ | |
| 132 | |
| 133 available_decoders = (const Sound_DecoderInfo **) | |
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134 malloc((i + 1) * sizeof (Sound_DecoderInfo *)); |
| 4 | 135 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 136 | |
| 137 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 138 available_decoders[i] = &decoderFuncs[i]->info; | |
| 139 | |
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140 available_decoders[i] = NULL; |
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141 |
| 4 | 142 initialized = 1; |
| 143 return(1); | |
| 144 } /* Sound_Init */ | |
| 145 | |
| 146 | |
| 147 int Sound_Quit(void) | |
| 148 { | |
| 149 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 150 | |
| 151 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 152 Sound_FreeSample(samplesList); | |
| 153 | |
| 154 if (available_decoders != NULL) | |
| 155 free(available_decoders); | |
| 156 available_decoders = NULL; | |
| 157 | |
| 158 initialized = 0; | |
| 159 | |
| 160 return(1); | |
| 161 } /* Sound_Quit */ | |
| 162 | |
| 163 | |
| 164 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 165 { | |
| 166 return(available_decoders); /* READ. ONLY. */ | |
| 167 } /* Sound_AvailableDecoders */ | |
| 168 | |
| 169 | |
| 170 const char *Sound_GetError(void) | |
| 171 { | |
| 172 return(SDL_GetError()); | |
| 173 } /* Sound_GetError */ | |
| 174 | |
| 175 | |
| 176 void Sound_ClearError(void) | |
| 177 { | |
| 178 SDL_ClearError(); | |
| 179 } /* Sound_ClearError */ | |
| 180 | |
| 181 | |
| 182 /* | |
| 183 * This is declared in the internal header. | |
| 184 */ | |
| 185 void Sound_SetError(const char *err) | |
| 186 { | |
| 187 if (err != NULL) | |
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188 { |
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189 _D(("Sound_SetError(\"%s\");\n", err)); |
| 4 | 190 SDL_SetError(err); |
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191 } /* if */ |
| 4 | 192 } /* Sound_SetError */ |
| 193 | |
| 194 | |
| 195 /* | |
| 196 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 197 * I honestly don't want to mess around with figuring out if a given | |
| 198 * platform has "strcasecmp", "stricmp", or | |
| 199 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 200 * next release of Carbon. :) This is exported so decoders may use it if | |
| 201 * they like. | |
| 202 */ | |
| 203 int __Sound_strcasecmp(const char *x, const char *y) | |
| 204 { | |
| 205 int ux, uy; | |
| 206 | |
| 207 do | |
| 208 { | |
| 209 ux = toupper((int) *x); | |
| 210 uy = toupper((int) *y); | |
| 211 if (ux > uy) | |
| 212 return(1); | |
| 213 else if (ux < uy) | |
| 214 return(-1); | |
| 215 x++; | |
| 216 y++; | |
| 217 } while ((ux) && (uy)); | |
| 218 | |
| 219 return(0); | |
| 220 } /* __Sound_strcasecmp */ | |
| 221 | |
| 222 | |
| 223 /* | |
| 224 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 225 * to be filled in later, by a decoder, will be initialized to zero. | |
| 226 */ | |
| 227 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 228 Uint32 bufferSize) | |
| 229 { | |
| 230 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 231 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 232 if ((retval == NULL) || (internal == NULL)) | |
| 233 { | |
| 234 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 235 if (retval) | |
| 236 free(retval); | |
| 237 if (internal) | |
| 238 free(internal); | |
| 239 | |
| 240 return(NULL); | |
| 241 } /* if */ | |
| 242 | |
| 243 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 244 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 245 | |
| 246 assert(bufferSize > 0); | |
| 247 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 248 if (!retval->buffer) | |
| 249 { | |
| 250 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 251 free(internal); | |
| 252 free(retval); | |
| 253 return(NULL); | |
| 254 } /* if */ | |
| 255 memset(retval->buffer, '\0', bufferSize); | |
| 256 retval->buffer_size = bufferSize; | |
| 257 | |
| 258 if (desired != NULL) | |
| 259 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 260 | |
| 261 internal->rw = rw; | |
| 262 retval->opaque = internal; | |
| 263 return(retval); | |
| 264 } /* alloc_sample */ | |
| 265 | |
| 266 | |
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267 #if (defined DEBUG_CHATTER) |
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268 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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269 { |
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270 switch(fmt) |
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271 { |
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272 case AUDIO_U8: |
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273 return("U8"); |
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274 case AUDIO_S8: |
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275 return("S8"); |
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276 case AUDIO_U16LSB: |
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277 return("U16LSB"); |
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278 case AUDIO_S16LSB: |
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279 return("S16LSB"); |
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280 case AUDIO_U16MSB: |
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281 return("U16MSB"); |
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282 case AUDIO_S16MSB: |
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283 return("S16MSB"); |
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284 } /* switch */ |
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285 |
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286 return("Unknown"); |
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287 } /* fmt_to_str */ |
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288 #endif |
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289 |
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290 |
| 4 | 291 /* |
| 292 * The bulk of the Sound_NewSample() work is done here... | |
| 293 * Ask the specified decoder to handle the data in (rw), and if | |
| 294 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 295 * back to where it was, and return false. | |
| 296 * | |
| 297 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 298 */ | |
| 299 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 300 Sound_Sample *sample, const char *ext, | |
| 301 Sound_AudioInfo *_desired) | |
| 302 { | |
| 303 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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304 Sound_AudioInfo desired; |
| 4 | 305 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 306 | |
| 307 /* fill in the funcs for this decoder... */ | |
| 308 sample->decoder = &funcs->info; | |
| 309 internal->funcs = funcs; | |
| 310 if (!funcs->open(sample, ext)) | |
| 311 { | |
| 312 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 313 return(0); | |
| 314 } /* if */ | |
| 315 | |
| 316 /* success; we've got a decoder! */ | |
| 317 | |
| 318 /* Now we need to set up the conversion buffer... */ | |
| 319 | |
| 320 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 321 sizeof (Sound_AudioInfo)); | |
| 322 | |
| 323 if (SDL_BuildAudioCVT(&internal->sdlcvt, | |
| 324 sample->actual.format, | |
| 325 sample->actual.channels, | |
| 326 (int) sample->actual.rate, /* !!! FIXME: Int? Really? */ | |
| 327 desired.format, | |
| 328 desired.channels, | |
| 329 (int) desired.rate) == -1) /* !!! FIXME: Int? Really? */ | |
| 330 { | |
| 331 Sound_SetError(SDL_GetError()); | |
| 332 funcs->close(sample); | |
| 333 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 334 return(0); | |
| 335 } /* if */ | |
| 336 | |
| 337 if (internal->sdlcvt.len_mult > 1) | |
| 338 { | |
| 339 void *rc = realloc(sample->buffer, | |
| 340 sample->buffer_size * internal->sdlcvt.len_mult); | |
| 341 if (rc == NULL) | |
| 342 { | |
| 343 funcs->close(sample); | |
| 344 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 345 return(0); | |
| 346 } /* if */ | |
| 347 | |
| 348 sample->buffer = rc; | |
| 349 } /* if */ | |
| 350 | |
| 351 /* these pointers are all one and the same. */ | |
| 352 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 353 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 354 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 355 internal->sdlcvt.len = internal->buffer_size; | |
| 356 | |
| 357 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 358 if (samplesList != NULL) | |
| 359 { | |
| 360 internal->next = samplesList; | |
| 361 if (samplesList != NULL) | |
| 362 internal->prev = sample; | |
| 363 } /* if */ | |
| 364 samplesList = sample; | |
| 365 | |
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366 #if (defined MULTIPLE_STREAMS_PER_RWOPS) |
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367 internal->pos = SDL_RWtell(internal->rw); |
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368 #endif |
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369 |
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370 _D(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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371 fmt_to_str(sample->desired.format), |
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372 sample->desired.rate, |
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373 sample->desired.channels)); |
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374 |
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375 _D(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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376 fmt_to_str(sample->actual.format), |
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377 sample->actual.rate, |
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378 sample->actual.channels)); |
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379 |
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380 _D(("On-the-fly conversion: %s.\n", |
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381 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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382 |
| 4 | 383 return(1); |
| 384 } /* init_sample */ | |
| 385 | |
| 386 | |
| 387 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 388 Sound_AudioInfo *desired, Uint32 bSize) | |
| 389 { | |
| 390 size_t i; | |
| 391 Sound_Sample *retval; | |
| 392 | |
| 393 /* sanity checks. */ | |
| 394 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 395 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 396 | |
| 397 retval = alloc_sample(rw, desired, bSize); | |
| 398 if (!retval) | |
| 399 return(NULL); /* alloc_sample() sets error message... */ | |
| 400 | |
| 401 if (ext != NULL) | |
| 402 { | |
| 403 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 404 { | |
| 405 const char *decoderExt = decoderFuncs[i]->info.extension; | |
| 406 if (__Sound_strcasecmp(decoderExt, ext) == 0) | |
| 407 { | |
| 408 if (init_sample(decoderFuncs[i], retval, ext, desired)) | |
| 409 return(retval); | |
| 410 } /* if */ | |
| 411 } /* for */ | |
| 412 } /* if */ | |
| 413 | |
| 414 /* no direct extension match? Try everything we've got... */ | |
| 415 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 416 { | |
| 417 if (init_sample(decoderFuncs[i], retval, ext, desired)) | |
| 418 return(retval); | |
| 419 } /* for */ | |
| 420 | |
| 421 /* nothing could handle the sound data... */ | |
| 422 free(retval->opaque); | |
| 423 if (retval->buffer != NULL) | |
| 424 free(retval->buffer); | |
| 425 free(retval); | |
| 426 SDL_RWclose(rw); | |
| 427 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 428 return(NULL); | |
| 429 } /* Sound_NewSample */ | |
| 430 | |
| 431 | |
| 432 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 433 Sound_AudioInfo *desired, | |
| 434 Uint32 bufferSize) | |
| 435 { | |
| 436 const char *ext; | |
| 437 SDL_RWops *rw; | |
| 438 | |
| 439 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 440 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 441 | |
| 442 ext = strrchr(filename, '.'); | |
| 443 rw = SDL_RWFromFile(filename, "rb"); | |
| 444 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 445 | |
| 446 if (ext != NULL) | |
| 447 ext++; | |
| 448 | |
| 449 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 450 } /* Sound_NewSampleFromFile */ | |
| 451 | |
| 452 | |
| 453 void Sound_FreeSample(Sound_Sample *sample) | |
| 454 { | |
| 455 Sound_SampleInternal *internal; | |
| 456 | |
| 457 if (!initialized) | |
| 458 { | |
| 459 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 460 return; | |
| 461 } /* if */ | |
| 462 | |
| 463 if (sample == NULL) | |
| 464 { | |
| 465 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 466 return; | |
| 467 } /* if */ | |
| 468 | |
| 469 internal = (Sound_SampleInternal *) sample->opaque; | |
| 470 | |
| 471 internal->funcs->close(sample); | |
| 472 | |
| 473 /* update the samplesList... */ | |
| 474 if (internal->prev != NULL) | |
| 475 { | |
| 476 Sound_SampleInternal *prevInternal; | |
| 477 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 478 prevInternal->next = internal->next; | |
| 479 } /* if */ | |
| 480 else | |
| 481 { | |
| 482 assert(samplesList == sample); | |
| 483 samplesList = internal->next; | |
| 484 } /* else */ | |
| 485 | |
| 486 if (internal->next != NULL) | |
| 487 { | |
| 488 Sound_SampleInternal *nextInternal; | |
| 489 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 490 nextInternal->prev = internal->prev; | |
| 491 } /* if */ | |
| 492 | |
| 493 /* nuke it... */ | |
| 494 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 495 SDL_RWclose(internal->rw); | |
| 496 assert(internal->buffer != NULL); | |
| 497 if (internal->buffer != sample->buffer) | |
| 498 free(internal->buffer); | |
| 499 free(internal); | |
| 500 if (sample->buffer != NULL) | |
| 501 free(sample->buffer); | |
| 502 free(sample); | |
| 503 } /* Sound_FreeSample */ | |
| 504 | |
| 505 | |
| 506 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 507 { | |
| 508 void *newBuf = NULL; | |
| 509 Sound_SampleInternal *internal = NULL; | |
| 510 | |
| 511 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 512 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 513 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 514 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 515 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 516 | |
| 517 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 518 sample->buffer_size = newSize; | |
| 519 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 520 internal->sdlcvt.len = internal->buffer_size; | |
| 521 | |
| 522 return(1); | |
| 523 } /* Sound_SetBufferSize */ | |
| 524 | |
| 525 | |
| 526 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 527 { | |
| 528 Sound_SampleInternal *internal = NULL; | |
| 529 Uint32 retval = 0; | |
| 530 | |
| 531 /* a boatload of sanity checks... */ | |
| 532 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 533 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 534 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 535 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 536 | |
| 537 internal = (Sound_SampleInternal *) sample->opaque; | |
| 538 | |
| 539 assert(sample->buffer != NULL); | |
| 540 assert(sample->buffer_size > 0); | |
| 541 assert(internal->buffer != NULL); | |
| 542 assert(internal->buffer_size > 0); | |
| 543 | |
| 544 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 545 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 546 | |
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547 #if (defined MULTIPLE_STREAMS_PER_RWOPS) |
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548 if (SDL_RWseek(internal->rw, internal->pos, SEEK_SET) == -1) |
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549 { |
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550 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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551 return(0); |
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552 } /* if */ |
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553 #endif |
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554 |
| 4 | 555 retval = internal->funcs->read(sample); |
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556 |
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557 #if (defined MULTIPLE_STREAMS_PER_RWOPS) |
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558 internal->pos = SDL_RWtell(internal->rw); |
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559 #endif |
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560 |
| 4 | 561 if (internal->sdlcvt.needed) |
| 562 { | |
| 563 internal->sdlcvt.len = retval; | |
| 564 SDL_ConvertAudio(&internal->sdlcvt); | |
| 565 retval *= internal->sdlcvt.len_mult; | |
| 566 } /* if */ | |
| 567 | |
| 568 return(retval); | |
| 569 } /* Sound_Decode */ | |
| 570 | |
| 571 | |
| 572 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 573 { | |
| 574 Sound_SampleInternal *internal = NULL; | |
| 575 void *buf = NULL; | |
| 576 Uint32 newBufSize = 0; | |
| 577 | |
| 578 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 579 | |
| 580 internal = (Sound_SampleInternal *) sample->opaque; | |
| 581 | |
| 582 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 583 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 584 { | |
| 585 void *ptr = realloc(buf, newBufSize + sample->buffer_size); | |
| 586 if (ptr == NULL) | |
| 587 { | |
| 588 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 589 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 590 } /* if */ | |
| 591 else | |
| 592 { | |
| 593 Uint32 br = Sound_Decode(sample); | |
| 594 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); | |
| 595 newBufSize += br; | |
| 596 } /* else */ | |
| 597 } /* while */ | |
| 598 | |
| 599 free(sample->buffer); | |
| 600 sample->buffer = internal->buffer = internal->sdlcvt.buf = buf; | |
| 601 sample->buffer_size = newBufSize; | |
| 602 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
| 603 internal->sdlcvt.len_mult = internal->buffer_size; | |
| 604 | |
| 605 return(newBufSize); | |
| 606 } /* Sound_DecodeAll */ | |
| 607 | |
| 608 | |
| 609 /* end of SDL_sound.c ... */ | |
| 610 |