Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 61:7d3a6ea7f1f0
Updated.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 24 Sep 2001 15:31:03 +0000 |
| parents | c4b8c39a9798 |
| children | b13fafb976be |
| 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 |
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51 #if (defined SOUND_SUPPORTS_MOD) |
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52 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MOD; |
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53 #endif |
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54 |
| 20 | 55 #if (defined SOUND_SUPPORTS_WAV) |
| 56 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
| 57 #endif | |
| 58 | |
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59 #if (defined SOUND_SUPPORTS_AIFF) |
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60 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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61 #endif |
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62 |
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63 #if (defined SOUND_SUPPORTS_OGG) |
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64 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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65 #endif |
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66 |
| 4 | 67 #if (defined SOUND_SUPPORTS_VOC) |
| 68 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
| 69 #endif | |
| 70 | |
| 71 #if (defined SOUND_SUPPORTS_RAW) | |
| 72 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
| 73 #endif | |
| 74 | |
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75 |
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76 |
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77 typedef struct |
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78 { |
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79 int available; |
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80 const Sound_DecoderFunctions *funcs; |
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81 } decoder_element; |
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82 |
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83 static decoder_element decoders[] = |
| 4 | 84 { |
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85 #if (defined SOUND_SUPPORTS_MP3) |
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86 { 0, &__Sound_DecoderFunctions_MP3 }, |
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87 #endif |
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88 |
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89 #if (defined SOUND_SUPPORTS_MOD) |
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90 { 0, &__Sound_DecoderFunctions_MOD }, |
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91 #endif |
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92 |
| 20 | 93 #if (defined SOUND_SUPPORTS_WAV) |
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94 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 95 #endif |
| 96 | |
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97 #if (defined SOUND_SUPPORTS_AIFF) |
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98 { 0, &__Sound_DecoderFunctions_AIFF }, |
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99 #endif |
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100 |
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101 #if (defined SOUND_SUPPORTS_OGG) |
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102 { 0, &__Sound_DecoderFunctions_OGG }, |
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103 #endif |
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104 |
| 4 | 105 #if (defined SOUND_SUPPORTS_VOC) |
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106 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 107 #endif |
| 108 | |
| 109 #if (defined SOUND_SUPPORTS_RAW) | |
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110 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 111 #endif |
| 112 }; | |
| 113 | |
| 114 | |
| 115 | |
| 116 /* General SDL_sound state ... */ | |
| 117 | |
| 118 static int initialized = 0; | |
| 119 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ | |
| 120 static const Sound_DecoderInfo **available_decoders = NULL; | |
| 121 | |
| 122 | |
| 123 /* functions ... */ | |
| 124 | |
| 125 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 126 { | |
| 127 if (ver != NULL) | |
| 128 { | |
| 129 ver->major = SOUND_VER_MAJOR; | |
| 130 ver->minor = SOUND_VER_MINOR; | |
| 131 ver->patch = SOUND_VER_PATCH; | |
| 132 } /* if */ | |
| 133 } /* Sound_GetLinkedVersion */ | |
| 134 | |
| 135 | |
| 136 int Sound_Init(void) | |
| 137 { | |
| 138 size_t i; | |
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139 size_t pos = 0; |
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140 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 141 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
| 142 samplesList = NULL; | |
| 143 | |
| 144 SDL_Init(SDL_INIT_AUDIO); | |
| 145 | |
| 146 available_decoders = (const Sound_DecoderInfo **) | |
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147 malloc((total + 1) * sizeof (Sound_DecoderInfo *)); |
| 4 | 148 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 149 | |
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150 for (i = 0; i < total; i++) |
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151 { |
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152 decoders[i].available = decoders[i].funcs->init(); |
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153 if (decoders[i].available) |
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154 { |
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155 available_decoders[pos] = &(decoders[i].funcs->info); |
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156 pos++; |
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157 } /* if */ |
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158 } /* for */ |
| 4 | 159 |
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160 available_decoders[pos] = NULL; |
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161 |
| 4 | 162 initialized = 1; |
| 163 return(1); | |
| 164 } /* Sound_Init */ | |
| 165 | |
| 166 | |
| 167 int Sound_Quit(void) | |
| 168 { | |
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169 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
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170 size_t i; |
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171 |
| 4 | 172 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 173 | |
| 174 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 175 Sound_FreeSample(samplesList); | |
| 176 | |
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177 for (i = 0; i < total; i++) |
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178 { |
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179 if (decoders[i].available) |
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180 { |
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181 decoders[i].funcs->quit(); |
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182 decoders[i].available = 0; |
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183 } /* if */ |
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184 } /* for */ |
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185 |
| 4 | 186 if (available_decoders != NULL) |
| 187 free(available_decoders); | |
| 188 available_decoders = NULL; | |
| 189 | |
| 190 initialized = 0; | |
| 191 | |
| 192 return(1); | |
| 193 } /* Sound_Quit */ | |
| 194 | |
| 195 | |
| 196 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 197 { | |
| 198 return(available_decoders); /* READ. ONLY. */ | |
| 199 } /* Sound_AvailableDecoders */ | |
| 200 | |
| 201 | |
| 202 const char *Sound_GetError(void) | |
| 203 { | |
| 204 return(SDL_GetError()); | |
| 205 } /* Sound_GetError */ | |
| 206 | |
| 207 | |
| 208 void Sound_ClearError(void) | |
| 209 { | |
| 210 SDL_ClearError(); | |
| 211 } /* Sound_ClearError */ | |
| 212 | |
| 213 | |
| 214 /* | |
| 215 * This is declared in the internal header. | |
| 216 */ | |
| 217 void Sound_SetError(const char *err) | |
| 218 { | |
| 219 if (err != NULL) | |
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220 { |
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221 _D(("Sound_SetError(\"%s\");\n", err)); |
| 4 | 222 SDL_SetError(err); |
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223 } /* if */ |
| 4 | 224 } /* Sound_SetError */ |
| 225 | |
| 226 | |
| 227 /* | |
| 228 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 229 * I honestly don't want to mess around with figuring out if a given | |
| 230 * platform has "strcasecmp", "stricmp", or | |
| 231 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 232 * next release of Carbon. :) This is exported so decoders may use it if | |
| 233 * they like. | |
| 234 */ | |
| 235 int __Sound_strcasecmp(const char *x, const char *y) | |
| 236 { | |
| 237 int ux, uy; | |
| 238 | |
| 239 do | |
| 240 { | |
| 241 ux = toupper((int) *x); | |
| 242 uy = toupper((int) *y); | |
| 243 if (ux > uy) | |
| 244 return(1); | |
| 245 else if (ux < uy) | |
| 246 return(-1); | |
| 247 x++; | |
| 248 y++; | |
| 249 } while ((ux) && (uy)); | |
| 250 | |
| 251 return(0); | |
| 252 } /* __Sound_strcasecmp */ | |
| 253 | |
| 254 | |
| 255 /* | |
| 256 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 257 * to be filled in later, by a decoder, will be initialized to zero. | |
| 258 */ | |
| 259 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 260 Uint32 bufferSize) | |
| 261 { | |
| 262 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 263 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 264 if ((retval == NULL) || (internal == NULL)) | |
| 265 { | |
| 266 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 267 if (retval) | |
| 268 free(retval); | |
| 269 if (internal) | |
| 270 free(internal); | |
| 271 | |
| 272 return(NULL); | |
| 273 } /* if */ | |
| 274 | |
| 275 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 276 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 277 | |
| 278 assert(bufferSize > 0); | |
| 279 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 280 if (!retval->buffer) | |
| 281 { | |
| 282 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 283 free(internal); | |
| 284 free(retval); | |
| 285 return(NULL); | |
| 286 } /* if */ | |
| 287 memset(retval->buffer, '\0', bufferSize); | |
| 288 retval->buffer_size = bufferSize; | |
| 289 | |
| 290 if (desired != NULL) | |
| 291 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 292 | |
| 293 internal->rw = rw; | |
| 294 retval->opaque = internal; | |
| 295 return(retval); | |
| 296 } /* alloc_sample */ | |
| 297 | |
| 298 | |
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299 #if (defined DEBUG_CHATTER) |
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300 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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301 { |
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302 switch(fmt) |
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303 { |
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304 case AUDIO_U8: |
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305 return("U8"); |
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306 case AUDIO_S8: |
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307 return("S8"); |
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308 case AUDIO_U16LSB: |
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309 return("U16LSB"); |
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310 case AUDIO_S16LSB: |
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311 return("S16LSB"); |
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312 case AUDIO_U16MSB: |
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313 return("U16MSB"); |
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314 case AUDIO_S16MSB: |
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315 return("S16MSB"); |
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316 } /* switch */ |
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317 |
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318 return("Unknown"); |
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319 } /* fmt_to_str */ |
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320 #endif |
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321 |
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322 |
| 4 | 323 /* |
| 324 * The bulk of the Sound_NewSample() work is done here... | |
| 325 * Ask the specified decoder to handle the data in (rw), and if | |
| 326 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 327 * back to where it was, and return false. | |
| 328 * | |
| 329 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 330 */ | |
| 331 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 332 Sound_Sample *sample, const char *ext, | |
| 333 Sound_AudioInfo *_desired) | |
| 334 { | |
| 335 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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336 Sound_AudioInfo desired; |
| 4 | 337 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 338 | |
| 339 /* fill in the funcs for this decoder... */ | |
| 340 sample->decoder = &funcs->info; | |
| 341 internal->funcs = funcs; | |
| 342 if (!funcs->open(sample, ext)) | |
| 343 { | |
| 344 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 345 return(0); | |
| 346 } /* if */ | |
| 347 | |
| 348 /* success; we've got a decoder! */ | |
| 349 | |
| 350 /* Now we need to set up the conversion buffer... */ | |
| 351 | |
| 352 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 353 sizeof (Sound_AudioInfo)); | |
| 354 | |
| 355 if (SDL_BuildAudioCVT(&internal->sdlcvt, | |
| 356 sample->actual.format, | |
| 357 sample->actual.channels, | |
| 358 (int) sample->actual.rate, /* !!! FIXME: Int? Really? */ | |
| 359 desired.format, | |
| 360 desired.channels, | |
| 361 (int) desired.rate) == -1) /* !!! FIXME: Int? Really? */ | |
| 362 { | |
| 363 Sound_SetError(SDL_GetError()); | |
| 364 funcs->close(sample); | |
| 365 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 366 return(0); | |
| 367 } /* if */ | |
| 368 | |
| 369 if (internal->sdlcvt.len_mult > 1) | |
| 370 { | |
| 371 void *rc = realloc(sample->buffer, | |
| 372 sample->buffer_size * internal->sdlcvt.len_mult); | |
| 373 if (rc == NULL) | |
| 374 { | |
| 375 funcs->close(sample); | |
| 376 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 377 return(0); | |
| 378 } /* if */ | |
| 379 | |
| 380 sample->buffer = rc; | |
| 381 } /* if */ | |
| 382 | |
| 383 /* these pointers are all one and the same. */ | |
| 384 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 385 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 386 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 387 internal->sdlcvt.len = internal->buffer_size; | |
| 388 | |
| 389 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 390 if (samplesList != NULL) | |
| 391 { | |
| 392 internal->next = samplesList; | |
| 393 if (samplesList != NULL) | |
| 394 internal->prev = sample; | |
| 395 } /* if */ | |
| 396 samplesList = sample; | |
| 397 | |
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398 _D(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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399 fmt_to_str(sample->desired.format), |
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400 sample->desired.rate, |
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401 sample->desired.channels)); |
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402 |
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403 _D(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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404 fmt_to_str(sample->actual.format), |
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405 sample->actual.rate, |
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406 sample->actual.channels)); |
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407 |
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408 _D(("On-the-fly conversion: %s.\n", |
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409 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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410 |
| 4 | 411 return(1); |
| 412 } /* init_sample */ | |
| 413 | |
| 414 | |
| 415 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 416 Sound_AudioInfo *desired, Uint32 bSize) | |
| 417 { | |
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418 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 419 size_t i; |
| 420 Sound_Sample *retval; | |
| 421 | |
| 422 /* sanity checks. */ | |
| 423 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 424 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 425 | |
| 426 retval = alloc_sample(rw, desired, bSize); | |
| 427 if (!retval) | |
| 428 return(NULL); /* alloc_sample() sets error message... */ | |
| 429 | |
| 430 if (ext != NULL) | |
| 431 { | |
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432 for (i = 0; i < total; i++) |
| 4 | 433 { |
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434 if (decoders[i].available) |
| 4 | 435 { |
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436 const char *decoderExt = decoders[i].funcs->info.extension; |
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437 if (__Sound_strcasecmp(decoderExt, ext) == 0) |
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438 { |
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439 if (init_sample(decoders[i].funcs, retval, ext, desired)) |
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440 return(retval); |
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441 } /* if */ |
| 4 | 442 } /* if */ |
| 443 } /* for */ | |
| 444 } /* if */ | |
| 445 | |
| 446 /* no direct extension match? Try everything we've got... */ | |
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447 for (i = 0; i < total; i++) |
| 4 | 448 { |
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449 if (decoders[i].available) |
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450 { |
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451 if (init_sample(decoders[i].funcs, retval, ext, desired)) |
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452 return(retval); |
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453 } /* if */ |
| 4 | 454 } /* for */ |
| 455 | |
| 456 /* nothing could handle the sound data... */ | |
| 457 free(retval->opaque); | |
| 458 if (retval->buffer != NULL) | |
| 459 free(retval->buffer); | |
| 460 free(retval); | |
| 461 SDL_RWclose(rw); | |
| 462 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 463 return(NULL); | |
| 464 } /* Sound_NewSample */ | |
| 465 | |
| 466 | |
| 467 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 468 Sound_AudioInfo *desired, | |
| 469 Uint32 bufferSize) | |
| 470 { | |
| 471 const char *ext; | |
| 472 SDL_RWops *rw; | |
| 473 | |
| 474 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 475 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 476 | |
| 477 ext = strrchr(filename, '.'); | |
| 478 rw = SDL_RWFromFile(filename, "rb"); | |
| 479 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 480 | |
| 481 if (ext != NULL) | |
| 482 ext++; | |
| 483 | |
| 484 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 485 } /* Sound_NewSampleFromFile */ | |
| 486 | |
| 487 | |
| 488 void Sound_FreeSample(Sound_Sample *sample) | |
| 489 { | |
| 490 Sound_SampleInternal *internal; | |
| 491 | |
| 492 if (!initialized) | |
| 493 { | |
| 494 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 495 return; | |
| 496 } /* if */ | |
| 497 | |
| 498 if (sample == NULL) | |
| 499 { | |
| 500 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 501 return; | |
| 502 } /* if */ | |
| 503 | |
| 504 internal = (Sound_SampleInternal *) sample->opaque; | |
| 505 | |
| 506 internal->funcs->close(sample); | |
| 507 | |
| 508 /* update the samplesList... */ | |
| 509 if (internal->prev != NULL) | |
| 510 { | |
| 511 Sound_SampleInternal *prevInternal; | |
| 512 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 513 prevInternal->next = internal->next; | |
| 514 } /* if */ | |
| 515 else | |
| 516 { | |
| 517 assert(samplesList == sample); | |
| 518 samplesList = internal->next; | |
| 519 } /* else */ | |
| 520 | |
| 521 if (internal->next != NULL) | |
| 522 { | |
| 523 Sound_SampleInternal *nextInternal; | |
| 524 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 525 nextInternal->prev = internal->prev; | |
| 526 } /* if */ | |
| 527 | |
| 528 /* nuke it... */ | |
| 529 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 530 SDL_RWclose(internal->rw); | |
| 531 assert(internal->buffer != NULL); | |
| 532 if (internal->buffer != sample->buffer) | |
| 533 free(internal->buffer); | |
| 534 free(internal); | |
| 535 if (sample->buffer != NULL) | |
| 536 free(sample->buffer); | |
| 537 free(sample); | |
| 538 } /* Sound_FreeSample */ | |
| 539 | |
| 540 | |
| 541 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 542 { | |
| 543 void *newBuf = NULL; | |
| 544 Sound_SampleInternal *internal = NULL; | |
| 545 | |
| 546 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 547 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 548 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 549 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 550 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 551 | |
| 552 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 553 sample->buffer_size = newSize; | |
| 554 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 555 internal->sdlcvt.len = internal->buffer_size; | |
| 556 | |
| 557 return(1); | |
| 558 } /* Sound_SetBufferSize */ | |
| 559 | |
| 560 | |
| 561 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 562 { | |
| 563 Sound_SampleInternal *internal = NULL; | |
| 564 Uint32 retval = 0; | |
| 565 | |
| 566 /* a boatload of sanity checks... */ | |
| 567 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 568 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 569 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 570 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 571 | |
| 572 internal = (Sound_SampleInternal *) sample->opaque; | |
| 573 | |
| 574 assert(sample->buffer != NULL); | |
| 575 assert(sample->buffer_size > 0); | |
| 576 assert(internal->buffer != NULL); | |
| 577 assert(internal->buffer_size > 0); | |
| 578 | |
| 579 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 580 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 581 retval = internal->funcs->read(sample); | |
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582 |
| 4 | 583 if (internal->sdlcvt.needed) |
| 584 { | |
| 585 internal->sdlcvt.len = retval; | |
| 586 SDL_ConvertAudio(&internal->sdlcvt); | |
| 587 retval *= internal->sdlcvt.len_mult; | |
| 588 } /* if */ | |
| 589 | |
| 590 return(retval); | |
| 591 } /* Sound_Decode */ | |
| 592 | |
| 593 | |
| 594 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 595 { | |
| 596 Sound_SampleInternal *internal = NULL; | |
| 597 void *buf = NULL; | |
| 598 Uint32 newBufSize = 0; | |
| 599 | |
| 600 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 601 | |
| 602 internal = (Sound_SampleInternal *) sample->opaque; | |
| 603 | |
| 604 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 605 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 606 { | |
| 607 void *ptr = realloc(buf, newBufSize + sample->buffer_size); | |
| 608 if (ptr == NULL) | |
| 609 { | |
| 610 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 611 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 612 } /* if */ | |
| 613 else | |
| 614 { | |
| 615 Uint32 br = Sound_Decode(sample); | |
| 616 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); | |
| 617 newBufSize += br; | |
| 618 } /* else */ | |
| 619 } /* while */ | |
| 620 | |
| 621 free(sample->buffer); | |
| 622 sample->buffer = internal->buffer = internal->sdlcvt.buf = buf; | |
| 623 sample->buffer_size = newBufSize; | |
| 624 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
| 625 internal->sdlcvt.len_mult = internal->buffer_size; | |
| 626 | |
| 627 return(newBufSize); | |
| 628 } /* Sound_DecodeAll */ | |
| 629 | |
| 630 | |
| 631 /* end of SDL_sound.c ... */ | |
| 632 |