Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 99:3f0beddfd9c9
Updated.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 02 Oct 2001 17:54:16 +0000 |
| parents | dfdf7b4e05bd |
| children | 72502bed0aef |
| 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) |
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187 free((void *) available_decoders); |
| 4 | 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 SNDDBG(("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 | |
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239 if (x == y) /* same pointer? Both NULL? */ |
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240 return(0); |
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241 |
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242 if (x == NULL) |
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243 return(-1); |
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244 |
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245 if (y == NULL) |
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246 return(1); |
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247 |
| 4 | 248 do |
| 249 { | |
| 250 ux = toupper((int) *x); | |
| 251 uy = toupper((int) *y); | |
| 252 if (ux > uy) | |
| 253 return(1); | |
| 254 else if (ux < uy) | |
| 255 return(-1); | |
| 256 x++; | |
| 257 y++; | |
| 258 } while ((ux) && (uy)); | |
| 259 | |
| 260 return(0); | |
| 261 } /* __Sound_strcasecmp */ | |
| 262 | |
| 263 | |
| 264 /* | |
| 265 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 266 * to be filled in later, by a decoder, will be initialized to zero. | |
| 267 */ | |
| 268 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 269 Uint32 bufferSize) | |
| 270 { | |
| 271 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 272 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 273 if ((retval == NULL) || (internal == NULL)) | |
| 274 { | |
| 275 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 276 if (retval) | |
| 277 free(retval); | |
| 278 if (internal) | |
| 279 free(internal); | |
| 280 | |
| 281 return(NULL); | |
| 282 } /* if */ | |
| 283 | |
| 284 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 285 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 286 | |
| 287 assert(bufferSize > 0); | |
| 288 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 289 if (!retval->buffer) | |
| 290 { | |
| 291 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 292 free(internal); | |
| 293 free(retval); | |
| 294 return(NULL); | |
| 295 } /* if */ | |
| 296 memset(retval->buffer, '\0', bufferSize); | |
| 297 retval->buffer_size = bufferSize; | |
| 298 | |
| 299 if (desired != NULL) | |
| 300 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 301 | |
| 302 internal->rw = rw; | |
| 303 retval->opaque = internal; | |
| 304 return(retval); | |
| 305 } /* alloc_sample */ | |
| 306 | |
| 307 | |
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308 #if (defined DEBUG_CHATTER) |
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309 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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310 { |
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311 switch(fmt) |
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312 { |
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313 case AUDIO_U8: |
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314 return("U8"); |
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315 case AUDIO_S8: |
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316 return("S8"); |
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317 case AUDIO_U16LSB: |
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318 return("U16LSB"); |
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319 case AUDIO_S16LSB: |
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320 return("S16LSB"); |
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321 case AUDIO_U16MSB: |
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322 return("U16MSB"); |
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323 case AUDIO_S16MSB: |
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324 return("S16MSB"); |
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325 } /* switch */ |
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326 |
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327 return("Unknown"); |
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328 } /* fmt_to_str */ |
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329 #endif |
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330 |
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331 |
| 4 | 332 /* |
| 333 * The bulk of the Sound_NewSample() work is done here... | |
| 334 * Ask the specified decoder to handle the data in (rw), and if | |
| 335 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 336 * back to where it was, and return false. | |
| 337 * | |
| 338 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 339 */ | |
| 340 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 341 Sound_Sample *sample, const char *ext, | |
| 342 Sound_AudioInfo *_desired) | |
| 343 { | |
| 344 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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345 Sound_AudioInfo desired; |
| 4 | 346 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 347 | |
| 348 /* fill in the funcs for this decoder... */ | |
| 349 sample->decoder = &funcs->info; | |
| 350 internal->funcs = funcs; | |
| 351 if (!funcs->open(sample, ext)) | |
| 352 { | |
| 353 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 354 return(0); | |
| 355 } /* if */ | |
| 356 | |
| 357 /* success; we've got a decoder! */ | |
| 358 | |
| 359 /* Now we need to set up the conversion buffer... */ | |
| 360 | |
| 361 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 362 sizeof (Sound_AudioInfo)); | |
| 363 | |
| 364 if (SDL_BuildAudioCVT(&internal->sdlcvt, | |
| 365 sample->actual.format, | |
| 366 sample->actual.channels, | |
| 367 (int) sample->actual.rate, /* !!! FIXME: Int? Really? */ | |
| 368 desired.format, | |
| 369 desired.channels, | |
| 370 (int) desired.rate) == -1) /* !!! FIXME: Int? Really? */ | |
| 371 { | |
| 372 Sound_SetError(SDL_GetError()); | |
| 373 funcs->close(sample); | |
| 374 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 375 return(0); | |
| 376 } /* if */ | |
| 377 | |
| 378 if (internal->sdlcvt.len_mult > 1) | |
| 379 { | |
| 380 void *rc = realloc(sample->buffer, | |
| 381 sample->buffer_size * internal->sdlcvt.len_mult); | |
| 382 if (rc == NULL) | |
| 383 { | |
| 384 funcs->close(sample); | |
| 385 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 386 return(0); | |
| 387 } /* if */ | |
| 388 | |
| 389 sample->buffer = rc; | |
| 390 } /* if */ | |
| 391 | |
| 392 /* these pointers are all one and the same. */ | |
| 393 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 394 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 395 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 396 internal->sdlcvt.len = internal->buffer_size; | |
| 397 | |
| 398 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 399 if (samplesList != NULL) | |
| 400 { | |
| 401 internal->next = samplesList; | |
| 402 if (samplesList != NULL) | |
| 403 internal->prev = sample; | |
| 404 } /* if */ | |
| 405 samplesList = sample; | |
| 406 | |
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407 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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408 fmt_to_str(sample->desired.format), |
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409 sample->desired.rate, |
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410 sample->desired.channels)); |
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411 |
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412 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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413 fmt_to_str(sample->actual.format), |
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414 sample->actual.rate, |
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415 sample->actual.channels)); |
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416 |
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417 SNDDBG(("On-the-fly conversion: %s.\n", |
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418 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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419 |
| 4 | 420 return(1); |
| 421 } /* init_sample */ | |
| 422 | |
| 423 | |
| 424 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 425 Sound_AudioInfo *desired, Uint32 bSize) | |
| 426 { | |
|
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427 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 428 size_t i; |
| 429 Sound_Sample *retval; | |
| 430 | |
| 431 /* sanity checks. */ | |
| 432 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 433 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 434 | |
| 435 retval = alloc_sample(rw, desired, bSize); | |
| 436 if (!retval) | |
| 437 return(NULL); /* alloc_sample() sets error message... */ | |
| 438 | |
| 439 if (ext != NULL) | |
| 440 { | |
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441 for (i = 0; i < total; i++) |
| 4 | 442 { |
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443 if (decoders[i].available) |
| 4 | 444 { |
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445 const char *decoderExt = decoders[i].funcs->info.extension; |
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446 if (__Sound_strcasecmp(decoderExt, ext) == 0) |
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447 { |
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448 if (init_sample(decoders[i].funcs, retval, ext, desired)) |
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449 return(retval); |
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450 } /* if */ |
| 4 | 451 } /* if */ |
| 452 } /* for */ | |
| 453 } /* if */ | |
| 454 | |
| 455 /* no direct extension match? Try everything we've got... */ | |
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456 for (i = 0; i < total; i++) |
| 4 | 457 { |
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458 if (decoders[i].available) |
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459 { |
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460 if (init_sample(decoders[i].funcs, retval, ext, desired)) |
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461 return(retval); |
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462 } /* if */ |
| 4 | 463 } /* for */ |
| 464 | |
| 465 /* nothing could handle the sound data... */ | |
| 466 free(retval->opaque); | |
| 467 if (retval->buffer != NULL) | |
| 468 free(retval->buffer); | |
| 469 free(retval); | |
| 470 SDL_RWclose(rw); | |
| 471 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 472 return(NULL); | |
| 473 } /* Sound_NewSample */ | |
| 474 | |
| 475 | |
| 476 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 477 Sound_AudioInfo *desired, | |
| 478 Uint32 bufferSize) | |
| 479 { | |
| 480 const char *ext; | |
| 481 SDL_RWops *rw; | |
| 482 | |
| 483 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 484 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 485 | |
| 486 ext = strrchr(filename, '.'); | |
| 487 rw = SDL_RWFromFile(filename, "rb"); | |
| 488 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 489 | |
| 490 if (ext != NULL) | |
| 491 ext++; | |
| 492 | |
| 493 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 494 } /* Sound_NewSampleFromFile */ | |
| 495 | |
| 496 | |
| 497 void Sound_FreeSample(Sound_Sample *sample) | |
| 498 { | |
| 499 Sound_SampleInternal *internal; | |
| 500 | |
| 501 if (!initialized) | |
| 502 { | |
| 503 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 504 return; | |
| 505 } /* if */ | |
| 506 | |
| 507 if (sample == NULL) | |
| 508 { | |
| 509 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 510 return; | |
| 511 } /* if */ | |
| 512 | |
| 513 internal = (Sound_SampleInternal *) sample->opaque; | |
| 514 | |
| 515 internal->funcs->close(sample); | |
| 516 | |
| 517 /* update the samplesList... */ | |
| 518 if (internal->prev != NULL) | |
| 519 { | |
| 520 Sound_SampleInternal *prevInternal; | |
| 521 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 522 prevInternal->next = internal->next; | |
| 523 } /* if */ | |
| 524 else | |
| 525 { | |
| 526 assert(samplesList == sample); | |
| 527 samplesList = internal->next; | |
| 528 } /* else */ | |
| 529 | |
| 530 if (internal->next != NULL) | |
| 531 { | |
| 532 Sound_SampleInternal *nextInternal; | |
| 533 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 534 nextInternal->prev = internal->prev; | |
| 535 } /* if */ | |
| 536 | |
| 537 /* nuke it... */ | |
| 538 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 539 SDL_RWclose(internal->rw); | |
| 540 assert(internal->buffer != NULL); | |
| 541 if (internal->buffer != sample->buffer) | |
| 542 free(internal->buffer); | |
| 543 free(internal); | |
| 544 if (sample->buffer != NULL) | |
| 545 free(sample->buffer); | |
| 546 free(sample); | |
| 547 } /* Sound_FreeSample */ | |
| 548 | |
| 549 | |
| 550 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 551 { | |
| 552 void *newBuf = NULL; | |
| 553 Sound_SampleInternal *internal = NULL; | |
| 554 | |
| 555 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 556 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 557 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 558 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 559 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 560 | |
| 561 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 562 sample->buffer_size = newSize; | |
| 563 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 564 internal->sdlcvt.len = internal->buffer_size; | |
| 565 | |
| 566 return(1); | |
| 567 } /* Sound_SetBufferSize */ | |
| 568 | |
| 569 | |
| 570 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 571 { | |
| 572 Sound_SampleInternal *internal = NULL; | |
| 573 Uint32 retval = 0; | |
| 574 | |
| 575 /* a boatload of sanity checks... */ | |
| 576 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 577 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 578 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 579 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 580 | |
| 581 internal = (Sound_SampleInternal *) sample->opaque; | |
| 582 | |
| 583 assert(sample->buffer != NULL); | |
| 584 assert(sample->buffer_size > 0); | |
| 585 assert(internal->buffer != NULL); | |
| 586 assert(internal->buffer_size > 0); | |
| 587 | |
| 588 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 589 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 590 retval = internal->funcs->read(sample); | |
|
37
f27bcbcaeab1
Added AIFF entry, and (for now) some multiple-streams-in-one-rwops support.
Ryan C. Gordon <icculus@icculus.org>
parents:
26
diff
changeset
|
591 |
| 4 | 592 if (internal->sdlcvt.needed) |
| 593 { | |
| 594 internal->sdlcvt.len = retval; | |
| 595 SDL_ConvertAudio(&internal->sdlcvt); | |
| 596 retval *= internal->sdlcvt.len_mult; | |
| 597 } /* if */ | |
| 598 | |
| 599 return(retval); | |
| 600 } /* Sound_Decode */ | |
| 601 | |
| 602 | |
| 603 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 604 { | |
| 605 Sound_SampleInternal *internal = NULL; | |
| 606 void *buf = NULL; | |
| 607 Uint32 newBufSize = 0; | |
| 608 | |
| 609 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 610 | |
| 611 internal = (Sound_SampleInternal *) sample->opaque; | |
| 612 | |
| 613 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 614 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 615 { | |
| 616 void *ptr = realloc(buf, newBufSize + sample->buffer_size); | |
| 617 if (ptr == NULL) | |
| 618 { | |
| 619 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 620 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 621 } /* if */ | |
| 622 else | |
| 623 { | |
| 624 Uint32 br = Sound_Decode(sample); | |
| 625 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); | |
| 626 newBufSize += br; | |
| 627 } /* else */ | |
| 628 } /* while */ | |
| 629 | |
| 630 free(sample->buffer); | |
| 631 sample->buffer = internal->buffer = internal->sdlcvt.buf = buf; | |
| 632 sample->buffer_size = newBufSize; | |
| 633 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
| 634 internal->sdlcvt.len_mult = internal->buffer_size; | |
| 635 | |
| 636 return(newBufSize); | |
| 637 } /* Sound_DecodeAll */ | |
| 638 | |
| 639 | |
| 640 /* end of SDL_sound.c ... */ | |
| 641 |