Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 178:bdbe09014724
Minor tweaks and such.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 05 Dec 2001 22:24:28 +0000 |
| parents | 705dcbf94639 |
| children | 47cc2de2ae36 |
| 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 | |
| 157 | 86 #if (defined SOUND_SUPPORTS_FLAC) |
| 87 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC; | |
| 88 #endif | |
| 89 | |
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90 |
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91 |
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92 typedef struct |
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93 { |
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94 int available; |
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95 const Sound_DecoderFunctions *funcs; |
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96 } decoder_element; |
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97 |
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98 static decoder_element decoders[] = |
| 4 | 99 { |
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100 #if (defined SOUND_SUPPORTS_MP3) |
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101 { 0, &__Sound_DecoderFunctions_MP3 }, |
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102 #endif |
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103 |
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104 #if (defined SOUND_SUPPORTS_MOD) |
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105 { 0, &__Sound_DecoderFunctions_MOD }, |
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106 #endif |
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107 |
| 20 | 108 #if (defined SOUND_SUPPORTS_WAV) |
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109 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 110 #endif |
| 111 | |
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112 #if (defined SOUND_SUPPORTS_AIFF) |
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113 { 0, &__Sound_DecoderFunctions_AIFF }, |
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114 #endif |
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115 |
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116 #if (defined SOUND_SUPPORTS_OGG) |
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117 { 0, &__Sound_DecoderFunctions_OGG }, |
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118 #endif |
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119 |
| 4 | 120 #if (defined SOUND_SUPPORTS_VOC) |
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121 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 122 #endif |
| 123 | |
| 124 #if (defined SOUND_SUPPORTS_RAW) | |
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125 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 126 #endif |
| 102 | 127 |
| 128 #if (defined SOUND_SUPPORTS_SHN) | |
| 129 { 0, &__Sound_DecoderFunctions_SHN }, | |
| 130 #endif | |
| 110 | 131 |
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132 #if (defined SOUND_SUPPORTS_FLAC) |
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133 { 0, &__Sound_DecoderFunctions_FLAC }, |
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134 #endif |
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135 |
| 110 | 136 #if (defined SOUND_SUPPORTS_MIDI) |
| 137 { 0, &__Sound_DecoderFunctions_MIDI }, | |
| 138 #endif | |
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139 |
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140 { 0, NULL } |
| 4 | 141 }; |
| 142 | |
| 143 | |
| 144 | |
| 145 /* General SDL_sound state ... */ | |
| 146 | |
| 147 static int initialized = 0; | |
| 148 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ | |
| 149 static const Sound_DecoderInfo **available_decoders = NULL; | |
| 150 | |
| 151 | |
| 152 /* functions ... */ | |
| 153 | |
| 154 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 155 { | |
| 156 if (ver != NULL) | |
| 157 { | |
| 158 ver->major = SOUND_VER_MAJOR; | |
| 159 ver->minor = SOUND_VER_MINOR; | |
| 160 ver->patch = SOUND_VER_PATCH; | |
| 161 } /* if */ | |
| 162 } /* Sound_GetLinkedVersion */ | |
| 163 | |
| 164 | |
| 165 int Sound_Init(void) | |
| 166 { | |
| 167 size_t i; | |
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168 size_t pos = 0; |
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169 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 170 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
| 171 samplesList = NULL; | |
| 172 | |
| 173 SDL_Init(SDL_INIT_AUDIO); | |
| 174 | |
| 175 available_decoders = (const Sound_DecoderInfo **) | |
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176 malloc((total) * sizeof (Sound_DecoderInfo *)); |
| 4 | 177 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 178 | |
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179 for (i = 0; decoders[i].funcs != NULL; i++) |
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180 { |
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181 decoders[i].available = decoders[i].funcs->init(); |
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182 if (decoders[i].available) |
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183 { |
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184 available_decoders[pos] = &(decoders[i].funcs->info); |
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185 pos++; |
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186 } /* if */ |
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187 } /* for */ |
| 4 | 188 |
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189 available_decoders[pos] = NULL; |
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190 |
| 4 | 191 initialized = 1; |
| 192 return(1); | |
| 193 } /* Sound_Init */ | |
| 194 | |
| 195 | |
| 196 int Sound_Quit(void) | |
| 197 { | |
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198 size_t i; |
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199 |
| 4 | 200 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 201 | |
| 202 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 203 Sound_FreeSample(samplesList); | |
| 204 | |
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205 for (i = 0; decoders[i].funcs != NULL; i++) |
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206 { |
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207 if (decoders[i].available) |
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208 { |
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209 decoders[i].funcs->quit(); |
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210 decoders[i].available = 0; |
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211 } /* if */ |
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212 } /* for */ |
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213 |
| 4 | 214 if (available_decoders != NULL) |
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215 free((void *) available_decoders); |
| 4 | 216 available_decoders = NULL; |
| 217 | |
| 218 initialized = 0; | |
| 219 | |
| 220 return(1); | |
| 221 } /* Sound_Quit */ | |
| 222 | |
| 223 | |
| 224 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 225 { | |
| 226 return(available_decoders); /* READ. ONLY. */ | |
| 227 } /* Sound_AvailableDecoders */ | |
| 228 | |
| 229 | |
| 230 const char *Sound_GetError(void) | |
| 231 { | |
| 232 return(SDL_GetError()); | |
| 233 } /* Sound_GetError */ | |
| 234 | |
| 235 | |
| 236 void Sound_ClearError(void) | |
| 237 { | |
| 238 SDL_ClearError(); | |
| 239 } /* Sound_ClearError */ | |
| 240 | |
| 241 | |
| 242 /* | |
| 243 * This is declared in the internal header. | |
| 244 */ | |
| 245 void Sound_SetError(const char *err) | |
| 246 { | |
|
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247 if (err != NULL) |
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248 { |
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249 SNDDBG(("Sound_SetError(\"%s\");\n", err)); |
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250 SDL_SetError(err); |
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251 } /* if */ |
| 4 | 252 } /* Sound_SetError */ |
| 253 | |
| 254 | |
| 255 /* | |
| 256 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 257 * I honestly don't want to mess around with figuring out if a given | |
| 258 * platform has "strcasecmp", "stricmp", or | |
| 259 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 260 * next release of Carbon. :) This is exported so decoders may use it if | |
| 261 * they like. | |
| 262 */ | |
| 263 int __Sound_strcasecmp(const char *x, const char *y) | |
| 264 { | |
| 265 int ux, uy; | |
| 266 | |
|
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267 if (x == y) /* same pointer? Both NULL? */ |
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268 return(0); |
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269 |
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270 if (x == NULL) |
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271 return(-1); |
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272 |
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273 if (y == NULL) |
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274 return(1); |
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275 |
| 4 | 276 do |
| 277 { | |
| 278 ux = toupper((int) *x); | |
| 279 uy = toupper((int) *y); | |
| 280 if (ux > uy) | |
| 281 return(1); | |
| 282 else if (ux < uy) | |
| 283 return(-1); | |
| 284 x++; | |
| 285 y++; | |
| 286 } while ((ux) && (uy)); | |
| 287 | |
| 288 return(0); | |
| 289 } /* __Sound_strcasecmp */ | |
| 290 | |
| 291 | |
| 292 /* | |
| 293 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 294 * to be filled in later, by a decoder, will be initialized to zero. | |
| 295 */ | |
| 296 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 297 Uint32 bufferSize) | |
| 298 { | |
| 299 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 300 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 301 if ((retval == NULL) || (internal == NULL)) | |
| 302 { | |
| 303 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 304 if (retval) | |
| 305 free(retval); | |
| 306 if (internal) | |
| 307 free(internal); | |
| 308 | |
| 309 return(NULL); | |
| 310 } /* if */ | |
| 311 | |
| 312 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 313 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 314 | |
| 315 assert(bufferSize > 0); | |
| 316 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 317 if (!retval->buffer) | |
| 318 { | |
| 319 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 320 free(internal); | |
| 321 free(retval); | |
| 322 return(NULL); | |
| 323 } /* if */ | |
| 324 memset(retval->buffer, '\0', bufferSize); | |
| 325 retval->buffer_size = bufferSize; | |
| 326 | |
| 327 if (desired != NULL) | |
| 328 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 329 | |
| 330 internal->rw = rw; | |
| 331 retval->opaque = internal; | |
| 332 return(retval); | |
| 333 } /* alloc_sample */ | |
| 334 | |
| 335 | |
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336 #if (defined DEBUG_CHATTER) |
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337 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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338 { |
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339 switch(fmt) |
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340 { |
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341 case AUDIO_U8: |
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342 return("U8"); |
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343 case AUDIO_S8: |
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344 return("S8"); |
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345 case AUDIO_U16LSB: |
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346 return("U16LSB"); |
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347 case AUDIO_S16LSB: |
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348 return("S16LSB"); |
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349 case AUDIO_U16MSB: |
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350 return("U16MSB"); |
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351 case AUDIO_S16MSB: |
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352 return("S16MSB"); |
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353 } /* switch */ |
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354 |
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355 return("Unknown"); |
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356 } /* fmt_to_str */ |
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357 #endif |
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358 |
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359 |
| 4 | 360 /* |
| 361 * The bulk of the Sound_NewSample() work is done here... | |
| 362 * Ask the specified decoder to handle the data in (rw), and if | |
| 363 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 364 * back to where it was, and return false. | |
| 365 * | |
| 366 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 367 */ | |
| 368 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 369 Sound_Sample *sample, const char *ext, | |
| 370 Sound_AudioInfo *_desired) | |
| 371 { | |
| 372 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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373 Sound_AudioInfo desired; |
| 4 | 374 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 375 | |
| 376 /* fill in the funcs for this decoder... */ | |
| 377 sample->decoder = &funcs->info; | |
| 378 internal->funcs = funcs; | |
| 379 if (!funcs->open(sample, ext)) | |
| 380 { | |
| 381 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 382 return(0); | |
| 383 } /* if */ | |
| 384 | |
| 385 /* success; we've got a decoder! */ | |
| 386 | |
| 387 /* Now we need to set up the conversion buffer... */ | |
| 388 | |
| 389 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 390 sizeof (Sound_AudioInfo)); | |
| 391 | |
|
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392 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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393 sample->actual.format, |
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394 sample->actual.channels, |
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395 sample->actual.rate, |
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396 desired.format, |
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397 desired.channels, |
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398 desired.rate) == -1) |
| 4 | 399 { |
| 400 Sound_SetError(SDL_GetError()); | |
| 401 funcs->close(sample); | |
| 402 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 403 return(0); | |
| 404 } /* if */ | |
| 405 | |
| 406 if (internal->sdlcvt.len_mult > 1) | |
| 407 { | |
| 408 void *rc = realloc(sample->buffer, | |
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409 sample->buffer_size * internal->sdlcvt.len_mult); |
| 4 | 410 if (rc == NULL) |
| 411 { | |
| 412 funcs->close(sample); | |
| 413 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 414 return(0); | |
| 415 } /* if */ | |
| 416 | |
| 417 sample->buffer = rc; | |
| 418 } /* if */ | |
| 419 | |
| 420 /* these pointers are all one and the same. */ | |
| 421 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 422 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 423 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 424 internal->sdlcvt.len = internal->buffer_size; | |
| 425 | |
| 426 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 427 if (samplesList != NULL) | |
| 428 { | |
| 429 internal->next = samplesList; | |
| 430 if (samplesList != NULL) | |
| 431 internal->prev = sample; | |
| 432 } /* if */ | |
| 433 samplesList = sample; | |
| 434 | |
|
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435 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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436 fmt_to_str(sample->desired.format), |
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437 sample->desired.rate, |
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438 sample->desired.channels)); |
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439 |
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440 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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441 fmt_to_str(sample->actual.format), |
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442 sample->actual.rate, |
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443 sample->actual.channels)); |
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444 |
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445 SNDDBG(("On-the-fly conversion: %s.\n", |
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446 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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447 |
| 4 | 448 return(1); |
| 449 } /* init_sample */ | |
| 450 | |
| 451 | |
| 452 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 453 Sound_AudioInfo *desired, Uint32 bSize) | |
| 454 { | |
| 455 Sound_Sample *retval; | |
|
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456 decoder_element *decoder; |
| 4 | 457 |
| 458 /* sanity checks. */ | |
| 459 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 460 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 461 | |
| 462 retval = alloc_sample(rw, desired, bSize); | |
| 463 if (!retval) | |
| 464 return(NULL); /* alloc_sample() sets error message... */ | |
| 465 | |
| 466 if (ext != NULL) | |
| 467 { | |
|
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468 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 469 { |
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470 if (decoder->available) |
| 4 | 471 { |
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472 const char **decoderExt = decoder->funcs->info.extensions; |
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473 while (*decoderExt) |
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474 { |
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475 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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476 { |
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477 if (init_sample(decoder->funcs, retval, ext, desired)) |
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478 return(retval); |
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479 } /* if */ |
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480 decoderExt++; |
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481 } /* while */ |
| 4 | 482 } /* if */ |
| 483 } /* for */ | |
| 484 } /* if */ | |
| 485 | |
| 486 /* no direct extension match? Try everything we've got... */ | |
|
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487 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 488 { |
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489 if (decoder->available) |
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490 { |
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491 if (init_sample(decoder->funcs, retval, ext, desired)) |
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492 return(retval); |
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493 } /* if */ |
| 4 | 494 } /* for */ |
| 495 | |
| 496 /* nothing could handle the sound data... */ | |
| 497 free(retval->opaque); | |
| 498 if (retval->buffer != NULL) | |
| 499 free(retval->buffer); | |
| 500 free(retval); | |
| 501 SDL_RWclose(rw); | |
| 502 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 503 return(NULL); | |
| 504 } /* Sound_NewSample */ | |
| 505 | |
| 506 | |
| 507 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 508 Sound_AudioInfo *desired, | |
| 509 Uint32 bufferSize) | |
| 510 { | |
| 511 const char *ext; | |
| 512 SDL_RWops *rw; | |
| 513 | |
| 514 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 515 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 516 | |
| 517 ext = strrchr(filename, '.'); | |
| 518 rw = SDL_RWFromFile(filename, "rb"); | |
| 519 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 520 | |
| 521 if (ext != NULL) | |
| 522 ext++; | |
| 523 | |
| 524 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 525 } /* Sound_NewSampleFromFile */ | |
| 526 | |
| 527 | |
| 528 void Sound_FreeSample(Sound_Sample *sample) | |
| 529 { | |
| 530 Sound_SampleInternal *internal; | |
| 531 | |
| 532 if (!initialized) | |
| 533 { | |
| 534 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 535 return; | |
| 536 } /* if */ | |
| 537 | |
| 538 if (sample == NULL) | |
| 539 { | |
| 540 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 541 return; | |
| 542 } /* if */ | |
| 543 | |
| 544 internal = (Sound_SampleInternal *) sample->opaque; | |
| 545 | |
| 546 internal->funcs->close(sample); | |
| 547 | |
| 548 /* update the samplesList... */ | |
| 549 if (internal->prev != NULL) | |
| 550 { | |
| 551 Sound_SampleInternal *prevInternal; | |
| 552 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 553 prevInternal->next = internal->next; | |
| 554 } /* if */ | |
| 555 else | |
| 556 { | |
| 557 assert(samplesList == sample); | |
| 558 samplesList = internal->next; | |
| 559 } /* else */ | |
| 560 | |
| 561 if (internal->next != NULL) | |
| 562 { | |
| 563 Sound_SampleInternal *nextInternal; | |
| 564 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 565 nextInternal->prev = internal->prev; | |
| 566 } /* if */ | |
| 567 | |
| 568 /* nuke it... */ | |
| 569 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 570 SDL_RWclose(internal->rw); | |
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571 |
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572 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
| 4 | 573 free(internal->buffer); |
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574 |
| 4 | 575 free(internal); |
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576 |
| 4 | 577 if (sample->buffer != NULL) |
| 578 free(sample->buffer); | |
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579 |
| 4 | 580 free(sample); |
| 581 } /* Sound_FreeSample */ | |
| 582 | |
| 583 | |
| 584 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 585 { | |
| 586 void *newBuf = NULL; | |
| 587 Sound_SampleInternal *internal = NULL; | |
| 588 | |
| 589 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 590 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 591 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 592 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 593 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 594 | |
| 595 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 596 sample->buffer_size = newSize; | |
| 597 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 598 internal->sdlcvt.len = internal->buffer_size; | |
| 599 | |
| 600 return(1); | |
| 601 } /* Sound_SetBufferSize */ | |
| 602 | |
| 603 | |
| 604 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 605 { | |
| 606 Sound_SampleInternal *internal = NULL; | |
| 607 Uint32 retval = 0; | |
| 608 | |
| 609 /* a boatload of sanity checks... */ | |
| 610 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 611 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 612 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 613 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 614 | |
| 615 internal = (Sound_SampleInternal *) sample->opaque; | |
| 616 | |
| 617 assert(sample->buffer != NULL); | |
| 618 assert(sample->buffer_size > 0); | |
| 619 assert(internal->buffer != NULL); | |
| 620 assert(internal->buffer_size > 0); | |
| 621 | |
| 622 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 623 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 624 retval = internal->funcs->read(sample); | |
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625 |
|
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626 if (retval > 0 && internal->sdlcvt.needed) |
| 4 | 627 { |
| 628 internal->sdlcvt.len = retval; | |
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629 Sound_ConvertAudio(&internal->sdlcvt); |
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630 retval = internal->sdlcvt.len_cvt; |
| 4 | 631 } /* if */ |
| 632 | |
| 633 return(retval); | |
| 634 } /* Sound_Decode */ | |
| 635 | |
| 636 | |
| 637 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 638 { | |
| 639 Sound_SampleInternal *internal = NULL; | |
| 640 void *buf = NULL; | |
| 641 Uint32 newBufSize = 0; | |
| 642 | |
| 643 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
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644 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
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645 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
| 4 | 646 |
| 647 internal = (Sound_SampleInternal *) sample->opaque; | |
| 648 | |
| 649 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 650 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 651 { | |
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652 Uint32 br = Sound_Decode(sample); |
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653 void *ptr = realloc(buf, newBufSize + br); |
| 4 | 654 if (ptr == NULL) |
| 655 { | |
| 656 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 657 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 658 } /* if */ | |
| 659 else | |
| 660 { | |
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661 buf = ptr; |
| 4 | 662 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
| 663 newBufSize += br; | |
| 664 } /* else */ | |
| 665 } /* while */ | |
| 666 | |
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667 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
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668 return(sample->buffer_size); |
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669 |
|
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670 if (internal->buffer != sample->buffer) |
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671 free(internal->buffer); |
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672 |
| 4 | 673 free(sample->buffer); |
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674 |
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675 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
| 4 | 676 sample->buffer_size = newBufSize; |
| 677 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
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678 internal->sdlcvt.len = internal->buffer_size; |
| 4 | 679 |
| 680 return(newBufSize); | |
| 681 } /* Sound_DecodeAll */ | |
| 682 | |
| 683 /* end of SDL_sound.c ... */ | |
| 684 |