Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 123:4996bb1ae449
Updated.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 08 Oct 2001 18:49:20 +0000 |
| parents | fd942c1433f8 |
| children | 3e60862fbd76 |
| 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 | |
| 110 | 82 #if (defined SOUND_SUPPORTS_MIDI) |
| 83 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIDI; | |
| 84 #endif | |
| 85 | |
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86 |
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87 |
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88 typedef struct |
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89 { |
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90 int available; |
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91 const Sound_DecoderFunctions *funcs; |
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92 } decoder_element; |
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93 |
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94 static decoder_element decoders[] = |
| 4 | 95 { |
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96 #if (defined SOUND_SUPPORTS_MP3) |
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97 { 0, &__Sound_DecoderFunctions_MP3 }, |
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98 #endif |
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99 |
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100 #if (defined SOUND_SUPPORTS_MOD) |
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101 { 0, &__Sound_DecoderFunctions_MOD }, |
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102 #endif |
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103 |
| 20 | 104 #if (defined SOUND_SUPPORTS_WAV) |
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105 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 106 #endif |
| 107 | |
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108 #if (defined SOUND_SUPPORTS_AIFF) |
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109 { 0, &__Sound_DecoderFunctions_AIFF }, |
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110 #endif |
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111 |
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112 #if (defined SOUND_SUPPORTS_OGG) |
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113 { 0, &__Sound_DecoderFunctions_OGG }, |
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114 #endif |
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115 |
| 4 | 116 #if (defined SOUND_SUPPORTS_VOC) |
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117 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 118 #endif |
| 119 | |
| 120 #if (defined SOUND_SUPPORTS_RAW) | |
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121 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 122 #endif |
| 102 | 123 |
| 124 #if (defined SOUND_SUPPORTS_SHN) | |
| 125 { 0, &__Sound_DecoderFunctions_SHN }, | |
| 126 #endif | |
| 110 | 127 |
| 128 #if (defined SOUND_SUPPORTS_MIDI) | |
| 129 { 0, &__Sound_DecoderFunctions_MIDI }, | |
| 130 #endif | |
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131 |
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132 { 0, NULL } |
| 4 | 133 }; |
| 134 | |
| 135 | |
| 136 | |
| 137 /* General SDL_sound state ... */ | |
| 138 | |
| 139 static int initialized = 0; | |
| 140 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ | |
| 141 static const Sound_DecoderInfo **available_decoders = NULL; | |
| 142 | |
| 143 | |
| 144 /* functions ... */ | |
| 145 | |
| 146 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 147 { | |
| 148 if (ver != NULL) | |
| 149 { | |
| 150 ver->major = SOUND_VER_MAJOR; | |
| 151 ver->minor = SOUND_VER_MINOR; | |
| 152 ver->patch = SOUND_VER_PATCH; | |
| 153 } /* if */ | |
| 154 } /* Sound_GetLinkedVersion */ | |
| 155 | |
| 156 | |
| 157 int Sound_Init(void) | |
| 158 { | |
| 159 size_t i; | |
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160 size_t pos = 0; |
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161 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 162 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
| 163 samplesList = NULL; | |
| 164 | |
| 165 SDL_Init(SDL_INIT_AUDIO); | |
| 166 | |
| 167 available_decoders = (const Sound_DecoderInfo **) | |
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168 malloc((total) * sizeof (Sound_DecoderInfo *)); |
| 4 | 169 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 170 | |
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171 for (i = 0; decoders[i].funcs != NULL; i++) |
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172 { |
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173 decoders[i].available = decoders[i].funcs->init(); |
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174 if (decoders[i].available) |
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175 { |
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176 available_decoders[pos] = &(decoders[i].funcs->info); |
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177 pos++; |
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178 } /* if */ |
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179 } /* for */ |
| 4 | 180 |
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181 available_decoders[pos] = NULL; |
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182 |
| 4 | 183 initialized = 1; |
| 184 return(1); | |
| 185 } /* Sound_Init */ | |
| 186 | |
| 187 | |
| 188 int Sound_Quit(void) | |
| 189 { | |
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190 size_t i; |
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191 |
| 4 | 192 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 193 | |
| 194 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 195 Sound_FreeSample(samplesList); | |
| 196 | |
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197 for (i = 0; decoders[i].funcs != NULL; i++) |
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198 { |
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199 if (decoders[i].available) |
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200 { |
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201 decoders[i].funcs->quit(); |
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202 decoders[i].available = 0; |
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203 } /* if */ |
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204 } /* for */ |
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205 |
| 4 | 206 if (available_decoders != NULL) |
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207 free((void *) available_decoders); |
| 4 | 208 available_decoders = NULL; |
| 209 | |
| 210 initialized = 0; | |
| 211 | |
| 212 return(1); | |
| 213 } /* Sound_Quit */ | |
| 214 | |
| 215 | |
| 216 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 217 { | |
| 218 return(available_decoders); /* READ. ONLY. */ | |
| 219 } /* Sound_AvailableDecoders */ | |
| 220 | |
| 221 | |
| 222 const char *Sound_GetError(void) | |
| 223 { | |
| 224 return(SDL_GetError()); | |
| 225 } /* Sound_GetError */ | |
| 226 | |
| 227 | |
| 228 void Sound_ClearError(void) | |
| 229 { | |
| 230 SDL_ClearError(); | |
| 231 } /* Sound_ClearError */ | |
| 232 | |
| 233 | |
| 234 /* | |
| 235 * This is declared in the internal header. | |
| 236 */ | |
| 237 void Sound_SetError(const char *err) | |
| 238 { | |
| 239 if (err != NULL) | |
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240 { |
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241 SNDDBG(("Sound_SetError(\"%s\");\n", err)); |
| 4 | 242 SDL_SetError(err); |
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243 } /* if */ |
| 4 | 244 } /* Sound_SetError */ |
| 245 | |
| 246 | |
| 247 /* | |
| 248 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 249 * I honestly don't want to mess around with figuring out if a given | |
| 250 * platform has "strcasecmp", "stricmp", or | |
| 251 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 252 * next release of Carbon. :) This is exported so decoders may use it if | |
| 253 * they like. | |
| 254 */ | |
| 255 int __Sound_strcasecmp(const char *x, const char *y) | |
| 256 { | |
| 257 int ux, uy; | |
| 258 | |
|
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259 if (x == y) /* same pointer? Both NULL? */ |
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260 return(0); |
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261 |
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262 if (x == NULL) |
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263 return(-1); |
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264 |
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265 if (y == NULL) |
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266 return(1); |
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267 |
| 4 | 268 do |
| 269 { | |
| 270 ux = toupper((int) *x); | |
| 271 uy = toupper((int) *y); | |
| 272 if (ux > uy) | |
| 273 return(1); | |
| 274 else if (ux < uy) | |
| 275 return(-1); | |
| 276 x++; | |
| 277 y++; | |
| 278 } while ((ux) && (uy)); | |
| 279 | |
| 280 return(0); | |
| 281 } /* __Sound_strcasecmp */ | |
| 282 | |
| 283 | |
| 284 /* | |
| 285 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 286 * to be filled in later, by a decoder, will be initialized to zero. | |
| 287 */ | |
| 288 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 289 Uint32 bufferSize) | |
| 290 { | |
| 291 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 292 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 293 if ((retval == NULL) || (internal == NULL)) | |
| 294 { | |
| 295 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 296 if (retval) | |
| 297 free(retval); | |
| 298 if (internal) | |
| 299 free(internal); | |
| 300 | |
| 301 return(NULL); | |
| 302 } /* if */ | |
| 303 | |
| 304 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 305 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 306 | |
| 307 assert(bufferSize > 0); | |
| 308 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 309 if (!retval->buffer) | |
| 310 { | |
| 311 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 312 free(internal); | |
| 313 free(retval); | |
| 314 return(NULL); | |
| 315 } /* if */ | |
| 316 memset(retval->buffer, '\0', bufferSize); | |
| 317 retval->buffer_size = bufferSize; | |
| 318 | |
| 319 if (desired != NULL) | |
| 320 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 321 | |
| 322 internal->rw = rw; | |
| 323 retval->opaque = internal; | |
| 324 return(retval); | |
| 325 } /* alloc_sample */ | |
| 326 | |
| 327 | |
|
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328 #if (defined DEBUG_CHATTER) |
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329 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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330 { |
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331 switch(fmt) |
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332 { |
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333 case AUDIO_U8: |
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334 return("U8"); |
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335 case AUDIO_S8: |
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336 return("S8"); |
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337 case AUDIO_U16LSB: |
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338 return("U16LSB"); |
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339 case AUDIO_S16LSB: |
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340 return("S16LSB"); |
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341 case AUDIO_U16MSB: |
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342 return("U16MSB"); |
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343 case AUDIO_S16MSB: |
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344 return("S16MSB"); |
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345 } /* switch */ |
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346 |
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347 return("Unknown"); |
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348 } /* fmt_to_str */ |
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349 #endif |
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350 |
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351 |
| 4 | 352 /* |
| 353 * The bulk of the Sound_NewSample() work is done here... | |
| 354 * Ask the specified decoder to handle the data in (rw), and if | |
| 355 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 356 * back to where it was, and return false. | |
| 357 * | |
| 358 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 359 */ | |
| 360 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 361 Sound_Sample *sample, const char *ext, | |
| 362 Sound_AudioInfo *_desired) | |
| 363 { | |
| 364 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
|
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365 Sound_AudioInfo desired; |
| 4 | 366 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 367 | |
| 368 /* fill in the funcs for this decoder... */ | |
| 369 sample->decoder = &funcs->info; | |
| 370 internal->funcs = funcs; | |
| 371 if (!funcs->open(sample, ext)) | |
| 372 { | |
| 373 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 374 return(0); | |
| 375 } /* if */ | |
| 376 | |
| 377 /* success; we've got a decoder! */ | |
| 378 | |
| 379 /* Now we need to set up the conversion buffer... */ | |
| 380 | |
| 381 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 382 sizeof (Sound_AudioInfo)); | |
| 383 | |
| 384 if (SDL_BuildAudioCVT(&internal->sdlcvt, | |
| 385 sample->actual.format, | |
| 386 sample->actual.channels, | |
| 387 (int) sample->actual.rate, /* !!! FIXME: Int? Really? */ | |
| 388 desired.format, | |
| 389 desired.channels, | |
| 390 (int) desired.rate) == -1) /* !!! FIXME: Int? Really? */ | |
| 391 { | |
| 392 Sound_SetError(SDL_GetError()); | |
| 393 funcs->close(sample); | |
| 394 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 395 return(0); | |
| 396 } /* if */ | |
| 397 | |
| 398 if (internal->sdlcvt.len_mult > 1) | |
| 399 { | |
| 400 void *rc = realloc(sample->buffer, | |
| 401 sample->buffer_size * internal->sdlcvt.len_mult); | |
| 402 if (rc == NULL) | |
| 403 { | |
| 404 funcs->close(sample); | |
| 405 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 406 return(0); | |
| 407 } /* if */ | |
| 408 | |
| 409 sample->buffer = rc; | |
| 410 } /* if */ | |
| 411 | |
| 412 /* these pointers are all one and the same. */ | |
| 413 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 414 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 415 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 416 internal->sdlcvt.len = internal->buffer_size; | |
| 417 | |
| 418 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 419 if (samplesList != NULL) | |
| 420 { | |
| 421 internal->next = samplesList; | |
| 422 if (samplesList != NULL) | |
| 423 internal->prev = sample; | |
| 424 } /* if */ | |
| 425 samplesList = sample; | |
| 426 | |
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427 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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428 fmt_to_str(sample->desired.format), |
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429 sample->desired.rate, |
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430 sample->desired.channels)); |
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431 |
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432 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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433 fmt_to_str(sample->actual.format), |
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434 sample->actual.rate, |
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435 sample->actual.channels)); |
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436 |
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437 SNDDBG(("On-the-fly conversion: %s.\n", |
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438 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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439 |
| 4 | 440 return(1); |
| 441 } /* init_sample */ | |
| 442 | |
| 443 | |
| 444 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 445 Sound_AudioInfo *desired, Uint32 bSize) | |
| 446 { | |
| 447 size_t i; | |
| 448 Sound_Sample *retval; | |
| 449 | |
| 450 /* sanity checks. */ | |
| 451 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 452 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 453 | |
| 454 retval = alloc_sample(rw, desired, bSize); | |
| 455 if (!retval) | |
| 456 return(NULL); /* alloc_sample() sets error message... */ | |
| 457 | |
| 458 if (ext != NULL) | |
| 459 { | |
|
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460 for (i = 0; decoders[i].funcs != NULL; i++) |
| 4 | 461 { |
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462 if (decoders[i].available) |
| 4 | 463 { |
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464 const char *decoderExt = decoders[i].funcs->info.extension; |
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465 if (__Sound_strcasecmp(decoderExt, ext) == 0) |
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466 { |
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467 if (init_sample(decoders[i].funcs, retval, ext, desired)) |
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468 return(retval); |
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469 } /* if */ |
| 4 | 470 } /* if */ |
| 471 } /* for */ | |
| 472 } /* if */ | |
| 473 | |
| 474 /* no direct extension match? Try everything we've got... */ | |
|
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475 for (i = 0; decoders[i].funcs != NULL; i++) |
| 4 | 476 { |
|
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477 if (decoders[i].available) |
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478 { |
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479 if (init_sample(decoders[i].funcs, retval, ext, desired)) |
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480 return(retval); |
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481 } /* if */ |
| 4 | 482 } /* for */ |
| 483 | |
| 484 /* nothing could handle the sound data... */ | |
| 485 free(retval->opaque); | |
| 486 if (retval->buffer != NULL) | |
| 487 free(retval->buffer); | |
| 488 free(retval); | |
| 489 SDL_RWclose(rw); | |
| 490 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 491 return(NULL); | |
| 492 } /* Sound_NewSample */ | |
| 493 | |
| 494 | |
| 495 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 496 Sound_AudioInfo *desired, | |
| 497 Uint32 bufferSize) | |
| 498 { | |
| 499 const char *ext; | |
| 500 SDL_RWops *rw; | |
| 501 | |
| 502 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 503 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 504 | |
| 505 ext = strrchr(filename, '.'); | |
| 506 rw = SDL_RWFromFile(filename, "rb"); | |
| 507 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 508 | |
| 509 if (ext != NULL) | |
| 510 ext++; | |
| 511 | |
| 512 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 513 } /* Sound_NewSampleFromFile */ | |
| 514 | |
| 515 | |
| 516 void Sound_FreeSample(Sound_Sample *sample) | |
| 517 { | |
| 518 Sound_SampleInternal *internal; | |
| 519 | |
| 520 if (!initialized) | |
| 521 { | |
| 522 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 523 return; | |
| 524 } /* if */ | |
| 525 | |
| 526 if (sample == NULL) | |
| 527 { | |
| 528 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 529 return; | |
| 530 } /* if */ | |
| 531 | |
| 532 internal = (Sound_SampleInternal *) sample->opaque; | |
| 533 | |
| 534 internal->funcs->close(sample); | |
| 535 | |
| 536 /* update the samplesList... */ | |
| 537 if (internal->prev != NULL) | |
| 538 { | |
| 539 Sound_SampleInternal *prevInternal; | |
| 540 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 541 prevInternal->next = internal->next; | |
| 542 } /* if */ | |
| 543 else | |
| 544 { | |
| 545 assert(samplesList == sample); | |
| 546 samplesList = internal->next; | |
| 547 } /* else */ | |
| 548 | |
| 549 if (internal->next != NULL) | |
| 550 { | |
| 551 Sound_SampleInternal *nextInternal; | |
| 552 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 553 nextInternal->prev = internal->prev; | |
| 554 } /* if */ | |
| 555 | |
| 556 /* nuke it... */ | |
| 557 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 558 SDL_RWclose(internal->rw); | |
| 559 assert(internal->buffer != NULL); | |
| 560 if (internal->buffer != sample->buffer) | |
| 561 free(internal->buffer); | |
| 562 free(internal); | |
| 563 if (sample->buffer != NULL) | |
| 564 free(sample->buffer); | |
| 565 free(sample); | |
| 566 } /* Sound_FreeSample */ | |
| 567 | |
| 568 | |
| 569 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 570 { | |
| 571 void *newBuf = NULL; | |
| 572 Sound_SampleInternal *internal = NULL; | |
| 573 | |
| 574 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 575 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 576 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 577 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 578 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 579 | |
| 580 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 581 sample->buffer_size = newSize; | |
| 582 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 583 internal->sdlcvt.len = internal->buffer_size; | |
| 584 | |
| 585 return(1); | |
| 586 } /* Sound_SetBufferSize */ | |
| 587 | |
| 588 | |
| 589 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 590 { | |
| 591 Sound_SampleInternal *internal = NULL; | |
| 592 Uint32 retval = 0; | |
| 593 | |
| 594 /* a boatload of sanity checks... */ | |
| 595 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 596 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 597 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 598 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 599 | |
| 600 internal = (Sound_SampleInternal *) sample->opaque; | |
| 601 | |
| 602 assert(sample->buffer != NULL); | |
| 603 assert(sample->buffer_size > 0); | |
| 604 assert(internal->buffer != NULL); | |
| 605 assert(internal->buffer_size > 0); | |
| 606 | |
| 607 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 608 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 609 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
|
610 |
| 4 | 611 if (internal->sdlcvt.needed) |
| 612 { | |
| 613 internal->sdlcvt.len = retval; | |
| 614 SDL_ConvertAudio(&internal->sdlcvt); | |
| 615 retval *= internal->sdlcvt.len_mult; | |
| 616 } /* if */ | |
| 617 | |
| 618 return(retval); | |
| 619 } /* Sound_Decode */ | |
| 620 | |
| 621 | |
| 622 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 623 { | |
| 624 Sound_SampleInternal *internal = NULL; | |
| 625 void *buf = NULL; | |
| 626 Uint32 newBufSize = 0; | |
| 627 | |
| 628 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 629 | |
| 630 internal = (Sound_SampleInternal *) sample->opaque; | |
| 631 | |
| 632 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 633 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 634 { | |
| 635 void *ptr = realloc(buf, newBufSize + sample->buffer_size); | |
| 636 if (ptr == NULL) | |
| 637 { | |
| 638 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 639 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 640 } /* if */ | |
| 641 else | |
| 642 { | |
| 643 Uint32 br = Sound_Decode(sample); | |
| 644 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); | |
| 645 newBufSize += br; | |
| 646 } /* else */ | |
| 647 } /* while */ | |
| 648 | |
| 649 free(sample->buffer); | |
| 650 sample->buffer = internal->buffer = internal->sdlcvt.buf = buf; | |
| 651 sample->buffer_size = newBufSize; | |
| 652 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
| 653 internal->sdlcvt.len_mult = internal->buffer_size; | |
| 654 | |
| 655 return(newBufSize); | |
| 656 } /* Sound_DecodeAll */ | |
| 657 | |
| 658 | |
| 659 /* end of SDL_sound.c ... */ | |
| 660 |