Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 108:803ba4dabbce
Initial add, from Torbj�rn Andersson.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 03 Oct 2001 20:17:13 +0000 |
| parents | 427541211bfd |
| children | 5e5adbe0f215 |
| 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 | |
|
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31 #if HAVE_CONFIG_H |
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32 # include <config.h> |
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33 #endif |
| 4 | 34 |
| 35 #include <stdio.h> | |
| 36 #include <stdlib.h> | |
| 37 #include <string.h> | |
| 38 #include <assert.h> | |
| 39 #include <ctype.h> | |
| 40 | |
| 41 #include "SDL.h" | |
| 42 #include "SDL_sound.h" | |
| 43 | |
| 44 #define __SDL_SOUND_INTERNAL__ | |
| 45 #include "SDL_sound_internal.h" | |
| 46 | |
| 47 | |
| 48 /* The various decoder drivers... */ | |
| 49 | |
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50 #if (defined SOUND_SUPPORTS_MP3) |
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51 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MP3; |
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52 #endif |
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53 |
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54 #if (defined SOUND_SUPPORTS_MOD) |
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55 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MOD; |
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56 #endif |
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57 |
| 20 | 58 #if (defined SOUND_SUPPORTS_WAV) |
| 59 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
| 60 #endif | |
| 61 | |
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62 #if (defined SOUND_SUPPORTS_AIFF) |
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63 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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64 #endif |
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65 |
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66 #if (defined SOUND_SUPPORTS_OGG) |
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67 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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68 #endif |
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69 |
| 4 | 70 #if (defined SOUND_SUPPORTS_VOC) |
| 71 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
| 72 #endif | |
| 73 | |
| 74 #if (defined SOUND_SUPPORTS_RAW) | |
| 75 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
| 76 #endif | |
| 77 | |
| 102 | 78 #if (defined SOUND_SUPPORTS_SHN) |
| 79 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN; | |
| 80 #endif | |
| 81 | |
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82 |
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83 |
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84 typedef struct |
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85 { |
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86 int available; |
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87 const Sound_DecoderFunctions *funcs; |
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88 } decoder_element; |
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89 |
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90 static decoder_element decoders[] = |
| 4 | 91 { |
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92 #if (defined SOUND_SUPPORTS_MP3) |
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93 { 0, &__Sound_DecoderFunctions_MP3 }, |
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94 #endif |
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95 |
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96 #if (defined SOUND_SUPPORTS_MOD) |
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97 { 0, &__Sound_DecoderFunctions_MOD }, |
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98 #endif |
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99 |
| 20 | 100 #if (defined SOUND_SUPPORTS_WAV) |
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101 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 102 #endif |
| 103 | |
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104 #if (defined SOUND_SUPPORTS_AIFF) |
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105 { 0, &__Sound_DecoderFunctions_AIFF }, |
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106 #endif |
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107 |
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108 #if (defined SOUND_SUPPORTS_OGG) |
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109 { 0, &__Sound_DecoderFunctions_OGG }, |
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110 #endif |
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111 |
| 4 | 112 #if (defined SOUND_SUPPORTS_VOC) |
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113 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 114 #endif |
| 115 | |
| 116 #if (defined SOUND_SUPPORTS_RAW) | |
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117 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 118 #endif |
| 102 | 119 |
| 120 #if (defined SOUND_SUPPORTS_SHN) | |
| 121 { 0, &__Sound_DecoderFunctions_SHN }, | |
| 122 #endif | |
| 4 | 123 }; |
| 124 | |
| 125 | |
| 126 | |
| 127 /* General SDL_sound state ... */ | |
| 128 | |
| 129 static int initialized = 0; | |
| 130 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ | |
| 131 static const Sound_DecoderInfo **available_decoders = NULL; | |
| 132 | |
| 133 | |
| 134 /* functions ... */ | |
| 135 | |
| 136 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 137 { | |
| 138 if (ver != NULL) | |
| 139 { | |
| 140 ver->major = SOUND_VER_MAJOR; | |
| 141 ver->minor = SOUND_VER_MINOR; | |
| 142 ver->patch = SOUND_VER_PATCH; | |
| 143 } /* if */ | |
| 144 } /* Sound_GetLinkedVersion */ | |
| 145 | |
| 146 | |
| 147 int Sound_Init(void) | |
| 148 { | |
| 149 size_t i; | |
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150 size_t pos = 0; |
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151 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 152 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
| 153 samplesList = NULL; | |
| 154 | |
| 155 SDL_Init(SDL_INIT_AUDIO); | |
| 156 | |
| 157 available_decoders = (const Sound_DecoderInfo **) | |
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158 malloc((total + 1) * sizeof (Sound_DecoderInfo *)); |
| 4 | 159 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 160 | |
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161 for (i = 0; i < total; i++) |
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162 { |
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163 decoders[i].available = decoders[i].funcs->init(); |
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164 if (decoders[i].available) |
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165 { |
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166 available_decoders[pos] = &(decoders[i].funcs->info); |
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167 pos++; |
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168 } /* if */ |
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169 } /* for */ |
| 4 | 170 |
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171 available_decoders[pos] = NULL; |
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172 |
| 4 | 173 initialized = 1; |
| 174 return(1); | |
| 175 } /* Sound_Init */ | |
| 176 | |
| 177 | |
| 178 int Sound_Quit(void) | |
| 179 { | |
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180 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
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181 size_t i; |
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182 |
| 4 | 183 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 184 | |
| 185 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 186 Sound_FreeSample(samplesList); | |
| 187 | |
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188 for (i = 0; i < total; i++) |
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189 { |
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190 if (decoders[i].available) |
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191 { |
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192 decoders[i].funcs->quit(); |
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193 decoders[i].available = 0; |
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194 } /* if */ |
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195 } /* for */ |
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196 |
| 4 | 197 if (available_decoders != NULL) |
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198 free((void *) available_decoders); |
| 4 | 199 available_decoders = NULL; |
| 200 | |
| 201 initialized = 0; | |
| 202 | |
| 203 return(1); | |
| 204 } /* Sound_Quit */ | |
| 205 | |
| 206 | |
| 207 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 208 { | |
| 209 return(available_decoders); /* READ. ONLY. */ | |
| 210 } /* Sound_AvailableDecoders */ | |
| 211 | |
| 212 | |
| 213 const char *Sound_GetError(void) | |
| 214 { | |
| 215 return(SDL_GetError()); | |
| 216 } /* Sound_GetError */ | |
| 217 | |
| 218 | |
| 219 void Sound_ClearError(void) | |
| 220 { | |
| 221 SDL_ClearError(); | |
| 222 } /* Sound_ClearError */ | |
| 223 | |
| 224 | |
| 225 /* | |
| 226 * This is declared in the internal header. | |
| 227 */ | |
| 228 void Sound_SetError(const char *err) | |
| 229 { | |
| 230 if (err != NULL) | |
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231 { |
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232 SNDDBG(("Sound_SetError(\"%s\");\n", err)); |
| 4 | 233 SDL_SetError(err); |
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234 } /* if */ |
| 4 | 235 } /* Sound_SetError */ |
| 236 | |
| 237 | |
| 238 /* | |
| 239 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 240 * I honestly don't want to mess around with figuring out if a given | |
| 241 * platform has "strcasecmp", "stricmp", or | |
| 242 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 243 * next release of Carbon. :) This is exported so decoders may use it if | |
| 244 * they like. | |
| 245 */ | |
| 246 int __Sound_strcasecmp(const char *x, const char *y) | |
| 247 { | |
| 248 int ux, uy; | |
| 249 | |
|
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250 if (x == y) /* same pointer? Both NULL? */ |
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251 return(0); |
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252 |
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253 if (x == NULL) |
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254 return(-1); |
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255 |
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256 if (y == NULL) |
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257 return(1); |
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258 |
| 4 | 259 do |
| 260 { | |
| 261 ux = toupper((int) *x); | |
| 262 uy = toupper((int) *y); | |
| 263 if (ux > uy) | |
| 264 return(1); | |
| 265 else if (ux < uy) | |
| 266 return(-1); | |
| 267 x++; | |
| 268 y++; | |
| 269 } while ((ux) && (uy)); | |
| 270 | |
| 271 return(0); | |
| 272 } /* __Sound_strcasecmp */ | |
| 273 | |
| 274 | |
| 275 /* | |
| 276 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 277 * to be filled in later, by a decoder, will be initialized to zero. | |
| 278 */ | |
| 279 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 280 Uint32 bufferSize) | |
| 281 { | |
| 282 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 283 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 284 if ((retval == NULL) || (internal == NULL)) | |
| 285 { | |
| 286 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 287 if (retval) | |
| 288 free(retval); | |
| 289 if (internal) | |
| 290 free(internal); | |
| 291 | |
| 292 return(NULL); | |
| 293 } /* if */ | |
| 294 | |
| 295 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 296 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 297 | |
| 298 assert(bufferSize > 0); | |
| 299 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 300 if (!retval->buffer) | |
| 301 { | |
| 302 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 303 free(internal); | |
| 304 free(retval); | |
| 305 return(NULL); | |
| 306 } /* if */ | |
| 307 memset(retval->buffer, '\0', bufferSize); | |
| 308 retval->buffer_size = bufferSize; | |
| 309 | |
| 310 if (desired != NULL) | |
| 311 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 312 | |
| 313 internal->rw = rw; | |
| 314 retval->opaque = internal; | |
| 315 return(retval); | |
| 316 } /* alloc_sample */ | |
| 317 | |
| 318 | |
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319 #if (defined DEBUG_CHATTER) |
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320 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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321 { |
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322 switch(fmt) |
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323 { |
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324 case AUDIO_U8: |
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325 return("U8"); |
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326 case AUDIO_S8: |
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327 return("S8"); |
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328 case AUDIO_U16LSB: |
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329 return("U16LSB"); |
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330 case AUDIO_S16LSB: |
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331 return("S16LSB"); |
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332 case AUDIO_U16MSB: |
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333 return("U16MSB"); |
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334 case AUDIO_S16MSB: |
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335 return("S16MSB"); |
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336 } /* switch */ |
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337 |
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338 return("Unknown"); |
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339 } /* fmt_to_str */ |
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340 #endif |
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341 |
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342 |
| 4 | 343 /* |
| 344 * The bulk of the Sound_NewSample() work is done here... | |
| 345 * Ask the specified decoder to handle the data in (rw), and if | |
| 346 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 347 * back to where it was, and return false. | |
| 348 * | |
| 349 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 350 */ | |
| 351 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 352 Sound_Sample *sample, const char *ext, | |
| 353 Sound_AudioInfo *_desired) | |
| 354 { | |
| 355 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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356 Sound_AudioInfo desired; |
| 4 | 357 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 358 | |
| 359 /* fill in the funcs for this decoder... */ | |
| 360 sample->decoder = &funcs->info; | |
| 361 internal->funcs = funcs; | |
| 362 if (!funcs->open(sample, ext)) | |
| 363 { | |
| 364 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 365 return(0); | |
| 366 } /* if */ | |
| 367 | |
| 368 /* success; we've got a decoder! */ | |
| 369 | |
| 370 /* Now we need to set up the conversion buffer... */ | |
| 371 | |
| 372 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 373 sizeof (Sound_AudioInfo)); | |
| 374 | |
| 375 if (SDL_BuildAudioCVT(&internal->sdlcvt, | |
| 376 sample->actual.format, | |
| 377 sample->actual.channels, | |
| 378 (int) sample->actual.rate, /* !!! FIXME: Int? Really? */ | |
| 379 desired.format, | |
| 380 desired.channels, | |
| 381 (int) desired.rate) == -1) /* !!! FIXME: Int? Really? */ | |
| 382 { | |
| 383 Sound_SetError(SDL_GetError()); | |
| 384 funcs->close(sample); | |
| 385 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 386 return(0); | |
| 387 } /* if */ | |
| 388 | |
| 389 if (internal->sdlcvt.len_mult > 1) | |
| 390 { | |
| 391 void *rc = realloc(sample->buffer, | |
| 392 sample->buffer_size * internal->sdlcvt.len_mult); | |
| 393 if (rc == NULL) | |
| 394 { | |
| 395 funcs->close(sample); | |
| 396 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 397 return(0); | |
| 398 } /* if */ | |
| 399 | |
| 400 sample->buffer = rc; | |
| 401 } /* if */ | |
| 402 | |
| 403 /* these pointers are all one and the same. */ | |
| 404 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 405 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 406 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 407 internal->sdlcvt.len = internal->buffer_size; | |
| 408 | |
| 409 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 410 if (samplesList != NULL) | |
| 411 { | |
| 412 internal->next = samplesList; | |
| 413 if (samplesList != NULL) | |
| 414 internal->prev = sample; | |
| 415 } /* if */ | |
| 416 samplesList = sample; | |
| 417 | |
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418 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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419 fmt_to_str(sample->desired.format), |
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420 sample->desired.rate, |
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421 sample->desired.channels)); |
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422 |
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423 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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424 fmt_to_str(sample->actual.format), |
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425 sample->actual.rate, |
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426 sample->actual.channels)); |
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427 |
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428 SNDDBG(("On-the-fly conversion: %s.\n", |
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429 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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430 |
| 4 | 431 return(1); |
| 432 } /* init_sample */ | |
| 433 | |
| 434 | |
| 435 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 436 Sound_AudioInfo *desired, Uint32 bSize) | |
| 437 { | |
|
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438 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 439 size_t i; |
| 440 Sound_Sample *retval; | |
| 441 | |
| 442 /* sanity checks. */ | |
| 443 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 444 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 445 | |
| 446 retval = alloc_sample(rw, desired, bSize); | |
| 447 if (!retval) | |
| 448 return(NULL); /* alloc_sample() sets error message... */ | |
| 449 | |
| 450 if (ext != NULL) | |
| 451 { | |
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452 for (i = 0; i < total; i++) |
| 4 | 453 { |
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454 if (decoders[i].available) |
| 4 | 455 { |
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456 const char *decoderExt = decoders[i].funcs->info.extension; |
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457 if (__Sound_strcasecmp(decoderExt, ext) == 0) |
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458 { |
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459 if (init_sample(decoders[i].funcs, retval, ext, desired)) |
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460 return(retval); |
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461 } /* if */ |
| 4 | 462 } /* if */ |
| 463 } /* for */ | |
| 464 } /* if */ | |
| 465 | |
| 466 /* no direct extension match? Try everything we've got... */ | |
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467 for (i = 0; i < total; i++) |
| 4 | 468 { |
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469 if (decoders[i].available) |
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470 { |
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471 if (init_sample(decoders[i].funcs, retval, ext, desired)) |
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472 return(retval); |
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473 } /* if */ |
| 4 | 474 } /* for */ |
| 475 | |
| 476 /* nothing could handle the sound data... */ | |
| 477 free(retval->opaque); | |
| 478 if (retval->buffer != NULL) | |
| 479 free(retval->buffer); | |
| 480 free(retval); | |
| 481 SDL_RWclose(rw); | |
| 482 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 483 return(NULL); | |
| 484 } /* Sound_NewSample */ | |
| 485 | |
| 486 | |
| 487 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 488 Sound_AudioInfo *desired, | |
| 489 Uint32 bufferSize) | |
| 490 { | |
| 491 const char *ext; | |
| 492 SDL_RWops *rw; | |
| 493 | |
| 494 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 495 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 496 | |
| 497 ext = strrchr(filename, '.'); | |
| 498 rw = SDL_RWFromFile(filename, "rb"); | |
| 499 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 500 | |
| 501 if (ext != NULL) | |
| 502 ext++; | |
| 503 | |
| 504 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 505 } /* Sound_NewSampleFromFile */ | |
| 506 | |
| 507 | |
| 508 void Sound_FreeSample(Sound_Sample *sample) | |
| 509 { | |
| 510 Sound_SampleInternal *internal; | |
| 511 | |
| 512 if (!initialized) | |
| 513 { | |
| 514 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 515 return; | |
| 516 } /* if */ | |
| 517 | |
| 518 if (sample == NULL) | |
| 519 { | |
| 520 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 521 return; | |
| 522 } /* if */ | |
| 523 | |
| 524 internal = (Sound_SampleInternal *) sample->opaque; | |
| 525 | |
| 526 internal->funcs->close(sample); | |
| 527 | |
| 528 /* update the samplesList... */ | |
| 529 if (internal->prev != NULL) | |
| 530 { | |
| 531 Sound_SampleInternal *prevInternal; | |
| 532 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 533 prevInternal->next = internal->next; | |
| 534 } /* if */ | |
| 535 else | |
| 536 { | |
| 537 assert(samplesList == sample); | |
| 538 samplesList = internal->next; | |
| 539 } /* else */ | |
| 540 | |
| 541 if (internal->next != NULL) | |
| 542 { | |
| 543 Sound_SampleInternal *nextInternal; | |
| 544 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 545 nextInternal->prev = internal->prev; | |
| 546 } /* if */ | |
| 547 | |
| 548 /* nuke it... */ | |
| 549 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 550 SDL_RWclose(internal->rw); | |
| 551 assert(internal->buffer != NULL); | |
| 552 if (internal->buffer != sample->buffer) | |
| 553 free(internal->buffer); | |
| 554 free(internal); | |
| 555 if (sample->buffer != NULL) | |
| 556 free(sample->buffer); | |
| 557 free(sample); | |
| 558 } /* Sound_FreeSample */ | |
| 559 | |
| 560 | |
| 561 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 562 { | |
| 563 void *newBuf = NULL; | |
| 564 Sound_SampleInternal *internal = NULL; | |
| 565 | |
| 566 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 567 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 568 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 569 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 570 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 571 | |
| 572 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 573 sample->buffer_size = newSize; | |
| 574 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 575 internal->sdlcvt.len = internal->buffer_size; | |
| 576 | |
| 577 return(1); | |
| 578 } /* Sound_SetBufferSize */ | |
| 579 | |
| 580 | |
| 581 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 582 { | |
| 583 Sound_SampleInternal *internal = NULL; | |
| 584 Uint32 retval = 0; | |
| 585 | |
| 586 /* a boatload of sanity checks... */ | |
| 587 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 588 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 589 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 590 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 591 | |
| 592 internal = (Sound_SampleInternal *) sample->opaque; | |
| 593 | |
| 594 assert(sample->buffer != NULL); | |
| 595 assert(sample->buffer_size > 0); | |
| 596 assert(internal->buffer != NULL); | |
| 597 assert(internal->buffer_size > 0); | |
| 598 | |
| 599 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 600 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 601 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
|
602 |
| 4 | 603 if (internal->sdlcvt.needed) |
| 604 { | |
| 605 internal->sdlcvt.len = retval; | |
| 606 SDL_ConvertAudio(&internal->sdlcvt); | |
| 607 retval *= internal->sdlcvt.len_mult; | |
| 608 } /* if */ | |
| 609 | |
| 610 return(retval); | |
| 611 } /* Sound_Decode */ | |
| 612 | |
| 613 | |
| 614 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 615 { | |
| 616 Sound_SampleInternal *internal = NULL; | |
| 617 void *buf = NULL; | |
| 618 Uint32 newBufSize = 0; | |
| 619 | |
| 620 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 621 | |
| 622 internal = (Sound_SampleInternal *) sample->opaque; | |
| 623 | |
| 624 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 625 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 626 { | |
| 627 void *ptr = realloc(buf, newBufSize + sample->buffer_size); | |
| 628 if (ptr == NULL) | |
| 629 { | |
| 630 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 631 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 632 } /* if */ | |
| 633 else | |
| 634 { | |
| 635 Uint32 br = Sound_Decode(sample); | |
| 636 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); | |
| 637 newBufSize += br; | |
| 638 } /* else */ | |
| 639 } /* while */ | |
| 640 | |
| 641 free(sample->buffer); | |
| 642 sample->buffer = internal->buffer = internal->sdlcvt.buf = buf; | |
| 643 sample->buffer_size = newBufSize; | |
| 644 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
| 645 internal->sdlcvt.len_mult = internal->buffer_size; | |
| 646 | |
| 647 return(newBufSize); | |
| 648 } /* Sound_DecodeAll */ | |
| 649 | |
| 650 | |
| 651 /* end of SDL_sound.c ... */ | |
| 652 |