Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 16:3efbcaf36fec
Initial add.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 19 Sep 2001 06:24:58 +0000 |
| parents | cc2c32349380 |
| children | d4ac6ce1360e |
| 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 | |
|
10
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
47 #if (defined SOUND_SUPPORTS_MP3) |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
48 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MP3; |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
49 #endif |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
50 |
| 4 | 51 #if (defined SOUND_SUPPORTS_VOC) |
| 52 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
| 53 #endif | |
| 54 | |
| 55 #if (defined SOUND_SUPPORTS_RAW) | |
| 56 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
| 57 #endif | |
| 58 | |
| 59 static const Sound_DecoderFunctions *decoderFuncs[] = | |
| 60 { | |
|
10
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
61 #if (defined SOUND_SUPPORTS_MP3) |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
62 &__Sound_DecoderFunctions_MP3, |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
63 #endif |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
64 |
| 4 | 65 #if (defined SOUND_SUPPORTS_VOC) |
| 66 &__Sound_DecoderFunctions_VOC, | |
| 67 #endif | |
| 68 | |
| 69 #if (defined SOUND_SUPPORTS_RAW) | |
| 70 &__Sound_DecoderFunctions_RAW, | |
| 71 #endif | |
| 72 | |
| 73 NULL | |
| 74 }; | |
| 75 | |
| 76 | |
| 77 | |
| 78 /* General SDL_sound state ... */ | |
| 79 | |
| 80 static int initialized = 0; | |
| 81 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ | |
| 82 static const Sound_DecoderInfo **available_decoders = NULL; | |
| 83 | |
| 84 | |
| 85 /* functions ... */ | |
| 86 | |
| 87 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 88 { | |
| 89 if (ver != NULL) | |
| 90 { | |
| 91 ver->major = SOUND_VER_MAJOR; | |
| 92 ver->minor = SOUND_VER_MINOR; | |
| 93 ver->patch = SOUND_VER_PATCH; | |
| 94 } /* if */ | |
| 95 } /* Sound_GetLinkedVersion */ | |
| 96 | |
| 97 | |
| 98 int Sound_Init(void) | |
| 99 { | |
| 100 size_t i; | |
| 101 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); | |
| 102 samplesList = NULL; | |
| 103 | |
| 104 SDL_Init(SDL_INIT_AUDIO); | |
| 105 | |
| 106 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 107 ; /* do nothing. */ | |
| 108 | |
| 109 i++; | |
| 110 available_decoders = (const Sound_DecoderInfo **) | |
| 111 malloc(i * sizeof (Sound_DecoderInfo *)); | |
| 112 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 113 | |
| 114 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 115 available_decoders[i] = &decoderFuncs[i]->info; | |
| 116 | |
| 117 initialized = 1; | |
| 118 return(1); | |
| 119 } /* Sound_Init */ | |
| 120 | |
| 121 | |
| 122 int Sound_Quit(void) | |
| 123 { | |
| 124 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 125 | |
| 126 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 127 Sound_FreeSample(samplesList); | |
| 128 | |
| 129 if (available_decoders != NULL) | |
| 130 free(available_decoders); | |
| 131 available_decoders = NULL; | |
| 132 | |
| 133 initialized = 0; | |
| 134 | |
| 135 return(1); | |
| 136 } /* Sound_Quit */ | |
| 137 | |
| 138 | |
| 139 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 140 { | |
| 141 return(available_decoders); /* READ. ONLY. */ | |
| 142 } /* Sound_AvailableDecoders */ | |
| 143 | |
| 144 | |
| 145 const char *Sound_GetError(void) | |
| 146 { | |
| 147 return(SDL_GetError()); | |
| 148 } /* Sound_GetError */ | |
| 149 | |
| 150 | |
| 151 void Sound_ClearError(void) | |
| 152 { | |
| 153 SDL_ClearError(); | |
| 154 } /* Sound_ClearError */ | |
| 155 | |
| 156 | |
| 157 /* | |
| 158 * This is declared in the internal header. | |
| 159 */ | |
| 160 void Sound_SetError(const char *err) | |
| 161 { | |
| 162 if (err != NULL) | |
|
10
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
163 { |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
164 _D(("Sound_SetError(\"%s\");\n", err)); |
| 4 | 165 SDL_SetError(err); |
|
10
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
166 } /* if */ |
| 4 | 167 } /* Sound_SetError */ |
| 168 | |
| 169 | |
| 170 /* | |
| 171 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 172 * I honestly don't want to mess around with figuring out if a given | |
| 173 * platform has "strcasecmp", "stricmp", or | |
| 174 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 175 * next release of Carbon. :) This is exported so decoders may use it if | |
| 176 * they like. | |
| 177 */ | |
| 178 int __Sound_strcasecmp(const char *x, const char *y) | |
| 179 { | |
| 180 int ux, uy; | |
| 181 | |
| 182 do | |
| 183 { | |
| 184 ux = toupper((int) *x); | |
| 185 uy = toupper((int) *y); | |
| 186 if (ux > uy) | |
| 187 return(1); | |
| 188 else if (ux < uy) | |
| 189 return(-1); | |
| 190 x++; | |
| 191 y++; | |
| 192 } while ((ux) && (uy)); | |
| 193 | |
| 194 return(0); | |
| 195 } /* __Sound_strcasecmp */ | |
| 196 | |
| 197 | |
| 198 /* | |
| 199 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 200 * to be filled in later, by a decoder, will be initialized to zero. | |
| 201 */ | |
| 202 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 203 Uint32 bufferSize) | |
| 204 { | |
| 205 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 206 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 207 if ((retval == NULL) || (internal == NULL)) | |
| 208 { | |
| 209 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 210 if (retval) | |
| 211 free(retval); | |
| 212 if (internal) | |
| 213 free(internal); | |
| 214 | |
| 215 return(NULL); | |
| 216 } /* if */ | |
| 217 | |
| 218 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 219 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 220 | |
| 221 assert(bufferSize > 0); | |
| 222 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 223 if (!retval->buffer) | |
| 224 { | |
| 225 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 226 free(internal); | |
| 227 free(retval); | |
| 228 return(NULL); | |
| 229 } /* if */ | |
| 230 memset(retval->buffer, '\0', bufferSize); | |
| 231 retval->buffer_size = bufferSize; | |
| 232 | |
| 233 if (desired != NULL) | |
| 234 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 235 | |
| 236 internal->rw = rw; | |
| 237 retval->opaque = internal; | |
| 238 return(retval); | |
| 239 } /* alloc_sample */ | |
| 240 | |
| 241 | |
|
10
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
242 #if (defined DEBUG_CHATTER) |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
243 static __inline__ const char *fmt_to_str(Uint16 fmt) |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
244 { |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
245 switch(fmt) |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
246 { |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
247 case AUDIO_U8: |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
248 return("U8"); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
249 case AUDIO_S8: |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
250 return("S8"); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
251 case AUDIO_U16LSB: |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
252 return("U16LSB"); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
253 case AUDIO_S16LSB: |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
254 return("S16LSB"); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
255 case AUDIO_U16MSB: |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
256 return("U16MSB"); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
257 case AUDIO_S16MSB: |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
258 return("S16MSB"); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
259 } /* switch */ |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
260 |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
261 return("Unknown"); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
262 } /* fmt_to_str */ |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
263 #endif |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
264 |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
265 |
| 4 | 266 /* |
| 267 * The bulk of the Sound_NewSample() work is done here... | |
| 268 * Ask the specified decoder to handle the data in (rw), and if | |
| 269 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 270 * back to where it was, and return false. | |
| 271 * | |
| 272 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 273 */ | |
| 274 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 275 Sound_Sample *sample, const char *ext, | |
| 276 Sound_AudioInfo *_desired) | |
| 277 { | |
| 278 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 279 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ | |
| 280 Sound_AudioInfo desired; | |
| 281 | |
| 282 /* fill in the funcs for this decoder... */ | |
| 283 sample->decoder = &funcs->info; | |
| 284 internal->funcs = funcs; | |
| 285 if (!funcs->open(sample, ext)) | |
| 286 { | |
| 287 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 288 return(0); | |
| 289 } /* if */ | |
| 290 | |
| 291 /* success; we've got a decoder! */ | |
| 292 | |
| 293 /* Now we need to set up the conversion buffer... */ | |
| 294 | |
| 295 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 296 sizeof (Sound_AudioInfo)); | |
| 297 | |
| 298 if (SDL_BuildAudioCVT(&internal->sdlcvt, | |
| 299 sample->actual.format, | |
| 300 sample->actual.channels, | |
| 301 (int) sample->actual.rate, /* !!! FIXME: Int? Really? */ | |
| 302 desired.format, | |
| 303 desired.channels, | |
| 304 (int) desired.rate) == -1) /* !!! FIXME: Int? Really? */ | |
| 305 { | |
| 306 Sound_SetError(SDL_GetError()); | |
| 307 funcs->close(sample); | |
| 308 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 309 return(0); | |
| 310 } /* if */ | |
| 311 | |
| 312 if (internal->sdlcvt.len_mult > 1) | |
| 313 { | |
| 314 void *rc = realloc(sample->buffer, | |
| 315 sample->buffer_size * internal->sdlcvt.len_mult); | |
| 316 if (rc == NULL) | |
| 317 { | |
| 318 funcs->close(sample); | |
| 319 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 320 return(0); | |
| 321 } /* if */ | |
| 322 | |
| 323 sample->buffer = rc; | |
| 324 } /* if */ | |
| 325 | |
| 326 /* these pointers are all one and the same. */ | |
| 327 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 328 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 329 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 330 internal->sdlcvt.len = internal->buffer_size; | |
| 331 | |
| 332 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 333 if (samplesList != NULL) | |
| 334 { | |
| 335 internal->next = samplesList; | |
| 336 if (samplesList != NULL) | |
| 337 internal->prev = sample; | |
| 338 } /* if */ | |
| 339 samplesList = sample; | |
| 340 | |
|
10
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
341 _D(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
342 fmt_to_str(sample->desired.format), |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
343 sample->desired.rate, |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
344 sample->desired.channels)); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
345 |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
346 _D(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
347 fmt_to_str(sample->actual.format), |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
348 sample->actual.rate, |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
349 sample->actual.channels)); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
350 |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
351 _D(("On-the-fly conversion: %s.\n", |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
352 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
|
cc2c32349380
Some debugging output, and MP3 and VOC entries, added.
Ryan C. Gordon <icculus@icculus.org>
parents:
4
diff
changeset
|
353 |
| 4 | 354 return(1); |
| 355 } /* init_sample */ | |
| 356 | |
| 357 | |
| 358 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 359 Sound_AudioInfo *desired, Uint32 bSize) | |
| 360 { | |
| 361 size_t i; | |
| 362 Sound_Sample *retval; | |
| 363 | |
| 364 /* sanity checks. */ | |
| 365 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 366 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 367 | |
| 368 retval = alloc_sample(rw, desired, bSize); | |
| 369 if (!retval) | |
| 370 return(NULL); /* alloc_sample() sets error message... */ | |
| 371 | |
| 372 if (ext != NULL) | |
| 373 { | |
| 374 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 375 { | |
| 376 const char *decoderExt = decoderFuncs[i]->info.extension; | |
| 377 if (__Sound_strcasecmp(decoderExt, ext) == 0) | |
| 378 { | |
| 379 if (init_sample(decoderFuncs[i], retval, ext, desired)) | |
| 380 return(retval); | |
| 381 } /* if */ | |
| 382 } /* for */ | |
| 383 } /* if */ | |
| 384 | |
| 385 /* no direct extension match? Try everything we've got... */ | |
| 386 for (i = 0; decoderFuncs[i] != NULL; i++) | |
| 387 { | |
| 388 if (init_sample(decoderFuncs[i], retval, ext, desired)) | |
| 389 return(retval); | |
| 390 } /* for */ | |
| 391 | |
| 392 /* nothing could handle the sound data... */ | |
| 393 free(retval->opaque); | |
| 394 if (retval->buffer != NULL) | |
| 395 free(retval->buffer); | |
| 396 free(retval); | |
| 397 SDL_RWclose(rw); | |
| 398 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 399 return(NULL); | |
| 400 } /* Sound_NewSample */ | |
| 401 | |
| 402 | |
| 403 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 404 Sound_AudioInfo *desired, | |
| 405 Uint32 bufferSize) | |
| 406 { | |
| 407 const char *ext; | |
| 408 SDL_RWops *rw; | |
| 409 | |
| 410 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 411 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 412 | |
| 413 ext = strrchr(filename, '.'); | |
| 414 rw = SDL_RWFromFile(filename, "rb"); | |
| 415 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 416 | |
| 417 if (ext != NULL) | |
| 418 ext++; | |
| 419 | |
| 420 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 421 } /* Sound_NewSampleFromFile */ | |
| 422 | |
| 423 | |
| 424 void Sound_FreeSample(Sound_Sample *sample) | |
| 425 { | |
| 426 Sound_SampleInternal *internal; | |
| 427 | |
| 428 if (!initialized) | |
| 429 { | |
| 430 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 431 return; | |
| 432 } /* if */ | |
| 433 | |
| 434 if (sample == NULL) | |
| 435 { | |
| 436 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 437 return; | |
| 438 } /* if */ | |
| 439 | |
| 440 internal = (Sound_SampleInternal *) sample->opaque; | |
| 441 | |
| 442 internal->funcs->close(sample); | |
| 443 | |
| 444 /* update the samplesList... */ | |
| 445 if (internal->prev != NULL) | |
| 446 { | |
| 447 Sound_SampleInternal *prevInternal; | |
| 448 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 449 prevInternal->next = internal->next; | |
| 450 } /* if */ | |
| 451 else | |
| 452 { | |
| 453 assert(samplesList == sample); | |
| 454 samplesList = internal->next; | |
| 455 } /* else */ | |
| 456 | |
| 457 if (internal->next != NULL) | |
| 458 { | |
| 459 Sound_SampleInternal *nextInternal; | |
| 460 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 461 nextInternal->prev = internal->prev; | |
| 462 } /* if */ | |
| 463 | |
| 464 /* nuke it... */ | |
| 465 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 466 SDL_RWclose(internal->rw); | |
| 467 assert(internal->buffer != NULL); | |
| 468 if (internal->buffer != sample->buffer) | |
| 469 free(internal->buffer); | |
| 470 free(internal); | |
| 471 if (sample->buffer != NULL) | |
| 472 free(sample->buffer); | |
| 473 free(sample); | |
| 474 } /* Sound_FreeSample */ | |
| 475 | |
| 476 | |
| 477 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 478 { | |
| 479 void *newBuf = NULL; | |
| 480 Sound_SampleInternal *internal = NULL; | |
| 481 | |
| 482 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 483 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 484 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 485 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 486 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 487 | |
| 488 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 489 sample->buffer_size = newSize; | |
| 490 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 491 internal->sdlcvt.len = internal->buffer_size; | |
| 492 | |
| 493 return(1); | |
| 494 } /* Sound_SetBufferSize */ | |
| 495 | |
| 496 | |
| 497 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 498 { | |
| 499 Sound_SampleInternal *internal = NULL; | |
| 500 Uint32 retval = 0; | |
| 501 | |
| 502 /* a boatload of sanity checks... */ | |
| 503 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 504 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 505 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 506 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 507 | |
| 508 internal = (Sound_SampleInternal *) sample->opaque; | |
| 509 | |
| 510 assert(sample->buffer != NULL); | |
| 511 assert(sample->buffer_size > 0); | |
| 512 assert(internal->buffer != NULL); | |
| 513 assert(internal->buffer_size > 0); | |
| 514 | |
| 515 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 516 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 517 | |
| 518 retval = internal->funcs->read(sample); | |
| 519 if (internal->sdlcvt.needed) | |
| 520 { | |
| 521 internal->sdlcvt.len = retval; | |
| 522 SDL_ConvertAudio(&internal->sdlcvt); | |
| 523 retval *= internal->sdlcvt.len_mult; | |
| 524 } /* if */ | |
| 525 | |
| 526 return(retval); | |
| 527 } /* Sound_Decode */ | |
| 528 | |
| 529 | |
| 530 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 531 { | |
| 532 Sound_SampleInternal *internal = NULL; | |
| 533 void *buf = NULL; | |
| 534 Uint32 newBufSize = 0; | |
| 535 | |
| 536 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 537 | |
| 538 internal = (Sound_SampleInternal *) sample->opaque; | |
| 539 | |
| 540 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 541 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 542 { | |
| 543 void *ptr = realloc(buf, newBufSize + sample->buffer_size); | |
| 544 if (ptr == NULL) | |
| 545 { | |
| 546 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 547 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 548 } /* if */ | |
| 549 else | |
| 550 { | |
| 551 Uint32 br = Sound_Decode(sample); | |
| 552 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); | |
| 553 newBufSize += br; | |
| 554 } /* else */ | |
| 555 } /* while */ | |
| 556 | |
| 557 free(sample->buffer); | |
| 558 sample->buffer = internal->buffer = internal->sdlcvt.buf = buf; | |
| 559 sample->buffer_size = newBufSize; | |
| 560 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
| 561 internal->sdlcvt.len_mult = internal->buffer_size; | |
| 562 | |
| 563 return(newBufSize); | |
| 564 } /* Sound_DecodeAll */ | |
| 565 | |
| 566 | |
| 567 /* end of SDL_sound.c ... */ | |
| 568 |