Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 212:8c2cb920a383
Changed the magic number macro to be more uniform with other decoders.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 13 Jan 2002 19:46:04 +0000 |
| parents | e63b9393f6ce |
| children | 07d0939d40e7 |
| 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 * | |
|
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26 * Please see the file COPYING in the source's root directory. |
| 4 | 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_MIKMOD) |
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55 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIKMOD; |
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56 #endif |
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57 |
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58 #if (defined SOUND_SUPPORTS_MODPLUG) |
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59 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG; |
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60 #endif |
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61 |
| 20 | 62 #if (defined SOUND_SUPPORTS_WAV) |
| 63 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
| 64 #endif | |
| 65 | |
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66 #if (defined SOUND_SUPPORTS_AIFF) |
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67 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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68 #endif |
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69 |
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70 #if (defined SOUND_SUPPORTS_OGG) |
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71 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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72 #endif |
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73 |
| 4 | 74 #if (defined SOUND_SUPPORTS_VOC) |
| 75 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
| 76 #endif | |
| 77 | |
| 78 #if (defined SOUND_SUPPORTS_RAW) | |
| 79 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
| 80 #endif | |
| 81 | |
| 102 | 82 #if (defined SOUND_SUPPORTS_SHN) |
| 83 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN; | |
| 84 #endif | |
| 85 | |
| 110 | 86 #if (defined SOUND_SUPPORTS_MIDI) |
| 87 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIDI; | |
| 88 #endif | |
| 89 | |
| 157 | 90 #if (defined SOUND_SUPPORTS_FLAC) |
| 91 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC; | |
| 92 #endif | |
| 93 | |
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94 |
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95 |
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96 typedef struct |
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97 { |
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98 int available; |
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99 const Sound_DecoderFunctions *funcs; |
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100 } decoder_element; |
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101 |
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102 static decoder_element decoders[] = |
| 4 | 103 { |
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104 #if (defined SOUND_SUPPORTS_MP3) |
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105 { 0, &__Sound_DecoderFunctions_MP3 }, |
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106 #endif |
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107 |
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108 #if (defined SOUND_SUPPORTS_MIKMOD) |
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109 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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110 #endif |
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111 |
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112 #if (defined SOUND_SUPPORTS_MODPLUG) |
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113 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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114 #endif |
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115 |
| 20 | 116 #if (defined SOUND_SUPPORTS_WAV) |
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117 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 118 #endif |
| 119 | |
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120 #if (defined SOUND_SUPPORTS_AIFF) |
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121 { 0, &__Sound_DecoderFunctions_AIFF }, |
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122 #endif |
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123 |
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124 #if (defined SOUND_SUPPORTS_OGG) |
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125 { 0, &__Sound_DecoderFunctions_OGG }, |
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126 #endif |
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127 |
| 4 | 128 #if (defined SOUND_SUPPORTS_VOC) |
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129 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 130 #endif |
| 131 | |
| 132 #if (defined SOUND_SUPPORTS_RAW) | |
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133 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 134 #endif |
| 102 | 135 |
| 136 #if (defined SOUND_SUPPORTS_SHN) | |
| 137 { 0, &__Sound_DecoderFunctions_SHN }, | |
| 138 #endif | |
| 110 | 139 |
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140 #if (defined SOUND_SUPPORTS_FLAC) |
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141 { 0, &__Sound_DecoderFunctions_FLAC }, |
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142 #endif |
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143 |
| 110 | 144 #if (defined SOUND_SUPPORTS_MIDI) |
| 145 { 0, &__Sound_DecoderFunctions_MIDI }, | |
| 146 #endif | |
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147 |
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148 { 0, NULL } |
| 4 | 149 }; |
| 150 | |
| 151 | |
| 152 | |
| 153 /* General SDL_sound state ... */ | |
| 154 | |
| 155 static int initialized = 0; | |
| 156 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ | |
| 157 static const Sound_DecoderInfo **available_decoders = NULL; | |
| 158 | |
| 159 | |
| 160 /* functions ... */ | |
| 161 | |
| 162 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 163 { | |
| 164 if (ver != NULL) | |
| 165 { | |
| 166 ver->major = SOUND_VER_MAJOR; | |
| 167 ver->minor = SOUND_VER_MINOR; | |
| 168 ver->patch = SOUND_VER_PATCH; | |
| 169 } /* if */ | |
| 170 } /* Sound_GetLinkedVersion */ | |
| 171 | |
| 172 | |
| 173 int Sound_Init(void) | |
| 174 { | |
| 175 size_t i; | |
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176 size_t pos = 0; |
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177 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 178 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
| 179 samplesList = NULL; | |
| 180 | |
| 181 SDL_Init(SDL_INIT_AUDIO); | |
| 182 | |
| 183 available_decoders = (const Sound_DecoderInfo **) | |
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184 malloc((total) * sizeof (Sound_DecoderInfo *)); |
| 4 | 185 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 186 | |
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187 for (i = 0; decoders[i].funcs != NULL; i++) |
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188 { |
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189 decoders[i].available = decoders[i].funcs->init(); |
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190 if (decoders[i].available) |
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191 { |
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192 available_decoders[pos] = &(decoders[i].funcs->info); |
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193 pos++; |
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194 } /* if */ |
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195 } /* for */ |
| 4 | 196 |
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197 available_decoders[pos] = NULL; |
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198 |
| 4 | 199 initialized = 1; |
| 200 return(1); | |
| 201 } /* Sound_Init */ | |
| 202 | |
| 203 | |
| 204 int Sound_Quit(void) | |
| 205 { | |
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206 size_t i; |
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207 |
| 4 | 208 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 209 | |
| 210 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 211 Sound_FreeSample(samplesList); | |
| 212 | |
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213 for (i = 0; decoders[i].funcs != NULL; i++) |
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214 { |
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215 if (decoders[i].available) |
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216 { |
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217 decoders[i].funcs->quit(); |
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218 decoders[i].available = 0; |
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219 } /* if */ |
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220 } /* for */ |
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221 |
| 4 | 222 if (available_decoders != NULL) |
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223 free((void *) available_decoders); |
| 4 | 224 available_decoders = NULL; |
| 225 | |
| 226 initialized = 0; | |
| 227 | |
| 228 return(1); | |
| 229 } /* Sound_Quit */ | |
| 230 | |
| 231 | |
| 232 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 233 { | |
| 234 return(available_decoders); /* READ. ONLY. */ | |
| 235 } /* Sound_AvailableDecoders */ | |
| 236 | |
| 237 | |
| 238 const char *Sound_GetError(void) | |
| 239 { | |
| 240 return(SDL_GetError()); | |
| 241 } /* Sound_GetError */ | |
| 242 | |
| 243 | |
| 244 void Sound_ClearError(void) | |
| 245 { | |
| 246 SDL_ClearError(); | |
| 247 } /* Sound_ClearError */ | |
| 248 | |
| 249 | |
| 250 /* | |
| 251 * This is declared in the internal header. | |
| 252 */ | |
| 253 void Sound_SetError(const char *err) | |
| 254 { | |
|
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255 if (err != NULL) |
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256 { |
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257 SNDDBG(("Sound_SetError(\"%s\");\n", err)); |
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258 SDL_SetError(err); |
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259 } /* if */ |
| 4 | 260 } /* Sound_SetError */ |
| 261 | |
| 262 | |
| 263 /* | |
| 264 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 265 * I honestly don't want to mess around with figuring out if a given | |
| 266 * platform has "strcasecmp", "stricmp", or | |
| 267 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 268 * next release of Carbon. :) This is exported so decoders may use it if | |
| 269 * they like. | |
| 270 */ | |
| 271 int __Sound_strcasecmp(const char *x, const char *y) | |
| 272 { | |
| 273 int ux, uy; | |
| 274 | |
|
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275 if (x == y) /* same pointer? Both NULL? */ |
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276 return(0); |
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277 |
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278 if (x == NULL) |
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279 return(-1); |
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280 |
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281 if (y == NULL) |
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282 return(1); |
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283 |
| 4 | 284 do |
| 285 { | |
| 286 ux = toupper((int) *x); | |
| 287 uy = toupper((int) *y); | |
| 288 if (ux > uy) | |
| 289 return(1); | |
| 290 else if (ux < uy) | |
| 291 return(-1); | |
| 292 x++; | |
| 293 y++; | |
| 294 } while ((ux) && (uy)); | |
| 295 | |
| 296 return(0); | |
| 297 } /* __Sound_strcasecmp */ | |
| 298 | |
| 299 | |
| 300 /* | |
| 301 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 302 * to be filled in later, by a decoder, will be initialized to zero. | |
| 303 */ | |
| 304 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 305 Uint32 bufferSize) | |
| 306 { | |
| 307 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 308 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 309 if ((retval == NULL) || (internal == NULL)) | |
| 310 { | |
| 311 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 312 if (retval) | |
| 313 free(retval); | |
| 314 if (internal) | |
| 315 free(internal); | |
| 316 | |
| 317 return(NULL); | |
| 318 } /* if */ | |
| 319 | |
| 320 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 321 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 322 | |
| 323 assert(bufferSize > 0); | |
| 324 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 325 if (!retval->buffer) | |
| 326 { | |
| 327 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 328 free(internal); | |
| 329 free(retval); | |
| 330 return(NULL); | |
| 331 } /* if */ | |
| 332 memset(retval->buffer, '\0', bufferSize); | |
| 333 retval->buffer_size = bufferSize; | |
| 334 | |
| 335 if (desired != NULL) | |
| 336 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 337 | |
| 338 internal->rw = rw; | |
| 339 retval->opaque = internal; | |
| 340 return(retval); | |
| 341 } /* alloc_sample */ | |
| 342 | |
| 343 | |
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344 #if (defined DEBUG_CHATTER) |
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345 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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346 { |
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347 switch(fmt) |
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348 { |
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349 case AUDIO_U8: |
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350 return("U8"); |
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351 case AUDIO_S8: |
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352 return("S8"); |
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353 case AUDIO_U16LSB: |
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354 return("U16LSB"); |
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355 case AUDIO_S16LSB: |
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356 return("S16LSB"); |
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357 case AUDIO_U16MSB: |
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358 return("U16MSB"); |
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359 case AUDIO_S16MSB: |
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360 return("S16MSB"); |
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361 } /* switch */ |
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362 |
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363 return("Unknown"); |
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364 } /* fmt_to_str */ |
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365 #endif |
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366 |
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367 |
| 4 | 368 /* |
| 369 * The bulk of the Sound_NewSample() work is done here... | |
| 370 * Ask the specified decoder to handle the data in (rw), and if | |
| 371 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 372 * back to where it was, and return false. | |
| 373 * | |
| 374 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 375 */ | |
| 376 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 377 Sound_Sample *sample, const char *ext, | |
| 378 Sound_AudioInfo *_desired) | |
| 379 { | |
| 380 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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381 Sound_AudioInfo desired; |
| 4 | 382 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 383 | |
| 384 /* fill in the funcs for this decoder... */ | |
| 385 sample->decoder = &funcs->info; | |
| 386 internal->funcs = funcs; | |
| 387 if (!funcs->open(sample, ext)) | |
| 388 { | |
| 389 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 390 return(0); | |
| 391 } /* if */ | |
| 392 | |
| 393 /* success; we've got a decoder! */ | |
| 394 | |
| 395 /* Now we need to set up the conversion buffer... */ | |
| 396 | |
| 397 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 398 sizeof (Sound_AudioInfo)); | |
| 399 | |
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400 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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401 sample->actual.format, |
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402 sample->actual.channels, |
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403 sample->actual.rate, |
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404 desired.format, |
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405 desired.channels, |
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406 desired.rate) == -1) |
| 4 | 407 { |
| 408 Sound_SetError(SDL_GetError()); | |
| 409 funcs->close(sample); | |
| 410 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 411 return(0); | |
| 412 } /* if */ | |
| 413 | |
| 414 if (internal->sdlcvt.len_mult > 1) | |
| 415 { | |
| 416 void *rc = realloc(sample->buffer, | |
|
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417 sample->buffer_size * internal->sdlcvt.len_mult); |
| 4 | 418 if (rc == NULL) |
| 419 { | |
| 420 funcs->close(sample); | |
| 421 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 422 return(0); | |
| 423 } /* if */ | |
| 424 | |
| 425 sample->buffer = rc; | |
| 426 } /* if */ | |
| 427 | |
| 428 /* these pointers are all one and the same. */ | |
| 429 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 430 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 431 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 432 internal->sdlcvt.len = internal->buffer_size; | |
| 433 | |
| 434 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 435 if (samplesList != NULL) | |
| 436 { | |
| 437 internal->next = samplesList; | |
| 438 if (samplesList != NULL) | |
| 439 internal->prev = sample; | |
| 440 } /* if */ | |
| 441 samplesList = sample; | |
| 442 | |
|
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443 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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444 fmt_to_str(sample->desired.format), |
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445 sample->desired.rate, |
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446 sample->desired.channels)); |
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447 |
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448 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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449 fmt_to_str(sample->actual.format), |
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450 sample->actual.rate, |
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451 sample->actual.channels)); |
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452 |
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453 SNDDBG(("On-the-fly conversion: %s.\n", |
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454 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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455 |
| 4 | 456 return(1); |
| 457 } /* init_sample */ | |
| 458 | |
| 459 | |
| 460 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 461 Sound_AudioInfo *desired, Uint32 bSize) | |
| 462 { | |
| 463 Sound_Sample *retval; | |
|
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464 decoder_element *decoder; |
| 4 | 465 |
| 466 /* sanity checks. */ | |
| 467 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 468 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 469 | |
| 470 retval = alloc_sample(rw, desired, bSize); | |
| 471 if (!retval) | |
| 472 return(NULL); /* alloc_sample() sets error message... */ | |
| 473 | |
| 474 if (ext != NULL) | |
| 475 { | |
|
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476 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 477 { |
|
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478 if (decoder->available) |
| 4 | 479 { |
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480 const char **decoderExt = decoder->funcs->info.extensions; |
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481 while (*decoderExt) |
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482 { |
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483 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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484 { |
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485 if (init_sample(decoder->funcs, retval, ext, desired)) |
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486 return(retval); |
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487 } /* if */ |
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488 decoderExt++; |
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489 } /* while */ |
| 4 | 490 } /* if */ |
| 491 } /* for */ | |
| 492 } /* if */ | |
| 493 | |
| 494 /* no direct extension match? Try everything we've got... */ | |
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495 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 496 { |
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497 if (decoder->available) |
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498 { |
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499 if (init_sample(decoder->funcs, retval, ext, desired)) |
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500 return(retval); |
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501 } /* if */ |
| 4 | 502 } /* for */ |
| 503 | |
| 504 /* nothing could handle the sound data... */ | |
| 505 free(retval->opaque); | |
| 506 if (retval->buffer != NULL) | |
| 507 free(retval->buffer); | |
| 508 free(retval); | |
| 509 SDL_RWclose(rw); | |
| 510 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 511 return(NULL); | |
| 512 } /* Sound_NewSample */ | |
| 513 | |
| 514 | |
| 515 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 516 Sound_AudioInfo *desired, | |
| 517 Uint32 bufferSize) | |
| 518 { | |
| 519 const char *ext; | |
| 520 SDL_RWops *rw; | |
| 521 | |
| 522 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 523 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 524 | |
| 525 ext = strrchr(filename, '.'); | |
| 526 rw = SDL_RWFromFile(filename, "rb"); | |
| 527 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 528 | |
| 529 if (ext != NULL) | |
| 530 ext++; | |
| 531 | |
| 532 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 533 } /* Sound_NewSampleFromFile */ | |
| 534 | |
| 535 | |
| 536 void Sound_FreeSample(Sound_Sample *sample) | |
| 537 { | |
| 538 Sound_SampleInternal *internal; | |
| 539 | |
| 540 if (!initialized) | |
| 541 { | |
| 542 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 543 return; | |
| 544 } /* if */ | |
| 545 | |
| 546 if (sample == NULL) | |
| 547 { | |
| 548 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 549 return; | |
| 550 } /* if */ | |
| 551 | |
| 552 internal = (Sound_SampleInternal *) sample->opaque; | |
| 553 | |
| 554 internal->funcs->close(sample); | |
| 555 | |
| 556 /* update the samplesList... */ | |
| 557 if (internal->prev != NULL) | |
| 558 { | |
| 559 Sound_SampleInternal *prevInternal; | |
| 560 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 561 prevInternal->next = internal->next; | |
| 562 } /* if */ | |
| 563 else | |
| 564 { | |
| 565 assert(samplesList == sample); | |
| 566 samplesList = internal->next; | |
| 567 } /* else */ | |
| 568 | |
| 569 if (internal->next != NULL) | |
| 570 { | |
| 571 Sound_SampleInternal *nextInternal; | |
| 572 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 573 nextInternal->prev = internal->prev; | |
| 574 } /* if */ | |
| 575 | |
| 576 /* nuke it... */ | |
| 577 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 578 SDL_RWclose(internal->rw); | |
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579 |
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580 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
| 4 | 581 free(internal->buffer); |
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582 |
| 4 | 583 free(internal); |
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584 |
| 4 | 585 if (sample->buffer != NULL) |
| 586 free(sample->buffer); | |
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587 |
| 4 | 588 free(sample); |
| 589 } /* Sound_FreeSample */ | |
| 590 | |
| 591 | |
| 592 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 593 { | |
| 594 void *newBuf = NULL; | |
| 595 Sound_SampleInternal *internal = NULL; | |
| 596 | |
| 597 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 598 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 599 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 600 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 601 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 602 | |
| 603 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 604 sample->buffer_size = newSize; | |
| 605 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 606 internal->sdlcvt.len = internal->buffer_size; | |
| 607 | |
| 608 return(1); | |
| 609 } /* Sound_SetBufferSize */ | |
| 610 | |
| 611 | |
| 612 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 613 { | |
| 614 Sound_SampleInternal *internal = NULL; | |
| 615 Uint32 retval = 0; | |
| 616 | |
| 617 /* a boatload of sanity checks... */ | |
| 618 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 619 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 620 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 621 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 622 | |
| 623 internal = (Sound_SampleInternal *) sample->opaque; | |
| 624 | |
| 625 assert(sample->buffer != NULL); | |
| 626 assert(sample->buffer_size > 0); | |
| 627 assert(internal->buffer != NULL); | |
| 628 assert(internal->buffer_size > 0); | |
| 629 | |
| 630 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 631 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 632 retval = internal->funcs->read(sample); | |
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633 |
|
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634 if (retval > 0 && internal->sdlcvt.needed) |
| 4 | 635 { |
| 636 internal->sdlcvt.len = retval; | |
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637 Sound_ConvertAudio(&internal->sdlcvt); |
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638 retval = internal->sdlcvt.len_cvt; |
| 4 | 639 } /* if */ |
| 640 | |
| 641 return(retval); | |
| 642 } /* Sound_Decode */ | |
| 643 | |
| 644 | |
| 645 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 646 { | |
| 647 Sound_SampleInternal *internal = NULL; | |
| 648 void *buf = NULL; | |
| 649 Uint32 newBufSize = 0; | |
| 650 | |
| 651 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
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652 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
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653 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
| 4 | 654 |
| 655 internal = (Sound_SampleInternal *) sample->opaque; | |
| 656 | |
| 657 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 658 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 659 { | |
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660 Uint32 br = Sound_Decode(sample); |
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661 void *ptr = realloc(buf, newBufSize + br); |
| 4 | 662 if (ptr == NULL) |
| 663 { | |
| 664 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 665 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 666 } /* if */ | |
| 667 else | |
| 668 { | |
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669 buf = ptr; |
| 4 | 670 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
| 671 newBufSize += br; | |
| 672 } /* else */ | |
| 673 } /* while */ | |
| 674 | |
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675 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
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676 return(sample->buffer_size); |
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677 |
|
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678 if (internal->buffer != sample->buffer) |
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679 free(internal->buffer); |
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680 |
| 4 | 681 free(sample->buffer); |
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682 |
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683 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
| 4 | 684 sample->buffer_size = newBufSize; |
| 685 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
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686 internal->sdlcvt.len = internal->buffer_size; |
| 4 | 687 |
| 688 return(newBufSize); | |
| 689 } /* Sound_DecodeAll */ | |
| 690 | |
| 691 /* end of SDL_sound.c ... */ | |
| 692 |