Mercurial > almixer_isolated
annotate Isolated/SoundDecoder.c @ 66:5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
If Apple, Core Audio will always be picked for WAV/MP3. This could be more flexible, but for shipping apps, there are not a lot of compelling reasons to not use Core Audio when it is available.
Ogg Vorbis/Tremor are in common areas so it is directly selectable since Core Audio does not support Ogg. You are responsible for not trying to compile/link both Vorbis/Tremor at the same time. They are mutually exclusive.
| author | Eric Wing <ewing . public |-at-| gmail . com> |
|---|---|
| date | Tue, 19 Jun 2012 00:40:32 -0700 |
| parents | 71b465ff0622 |
| children | be97ae4f30c0 |
| rev | line source |
|---|---|
| 38 | 1 #ifndef ALMIXER_COMPILED_WITH_SDL |
| 2 | |
| 3 #include "SoundDecoder.h" | |
| 4 #include "SoundDecoder_Internal.h" | |
| 5 #include "tErrorLib.h" | |
| 6 #include "LinkedList.h" | |
| 7 #include <stdlib.h> | |
| 8 #include <string.h> | |
| 9 #include <assert.h> | |
| 10 | |
| 11 #ifdef ANDROID_NDK | |
| 12 #include <android/log.h> | |
| 13 #endif | |
| 14 | |
| 15 /* A partial shim reimplementation of SDL_sound to work around the LGPL issues. | |
| 16 * This implementation is more limited than SDL_sound. | |
| 17 * For example, there is no generic software conversion routines. | |
| 18 * Functions are also not necessarily thread safe. | |
| 19 * This implementation relies on the back-end decoder much more heavily | |
| 20 * than SDL_sound. (For example, I bypass the internal->buffer.) | |
| 21 */ | |
| 22 | |
| 23 static LinkedList* s_listOfLoadedSamples = NULL; | |
| 24 | |
| 25 static signed char s_isInitialized = 0; | |
| 26 static TErrorPool* s_errorPool = NULL; | |
| 27 | |
| 28 static const SoundDecoder_DecoderInfo** s_availableDecoders = NULL; | |
| 29 | |
|
66
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
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30 #ifdef __APPLE__ /* I'm making Apple use the Core Audio backend. */ |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
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changeset
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31 //extern const SoundDecoder_DecoderFunctions __SoundDecoder_DecoderFunctions_CoreAudio; |
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5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
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changeset
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32 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_CoreAudio; |
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5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
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changeset
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33 #else /* Not Apple */ |
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5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
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changeset
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34 #ifdef SOUND_SUPPORTS_WAV |
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5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
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35 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; |
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5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
36 #endif |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
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changeset
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37 #ifdef SOUND_SUPPORTS_MPG123 |
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5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
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38 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MPG123; |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
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39 #endif |
| 38 | 40 #endif |
|
66
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
41 |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
42 /* Note: Make sure to compile only Vorbis xor Tremor, not both. */ |
| 38 | 43 #ifdef SOUND_SUPPORTS_OGG |
|
66
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
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44 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
| 38 | 45 #endif |
| 46 | |
| 47 typedef struct | |
| 48 { | |
| 49 int available; | |
| 50 const SoundDecoder_DecoderFunctions* funcs; | |
| 51 } SoundElement; | |
| 52 | |
| 53 static SoundElement s_linkedDecoders[] = | |
| 54 { | |
| 55 #if defined(__APPLE__) | |
|
66
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
56 { 0, &__Sound_DecoderFunctions_CoreAudio }, |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
57 #else /* Not Apple */ |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
58 #ifdef SOUND_SUPPORTS_WAV |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
59 { 0, &__Sound_DecoderFunctions_WAV }, |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
60 #endif |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
61 #ifdef SOUND_SUPPORTS_MPG123 |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
62 { 0, &__Sound_DecoderFunctions_MPG123 }, |
|
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
63 #endif |
| 38 | 64 #endif |
|
66
5c9eaf0cc385
Macro cleanups for selecting which decoders to compile in. Before this was hacked for Apple vs. Android. But now it is Apple vs. whatever to be a little more flexible.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
38
diff
changeset
|
65 /* Note: Make sure to link only Vorbis xor Tremor, not both. */ |
| 38 | 66 #ifdef SOUND_SUPPORTS_OGG |
| 67 { 0, &__Sound_DecoderFunctions_OGG }, | |
| 68 #endif | |
| 69 { 0, NULL } | |
| 70 }; | |
| 71 | |
| 72 | |
| 73 #include <ctype.h> | |
| 74 int SoundDecoder_strcasecmp(const char* str1, const char* str2) | |
| 75 { | |
| 76 int the_char1; | |
| 77 int the_char2; | |
| 78 int i = 0; | |
| 79 if(str1 == str2) | |
| 80 { | |
| 81 return 0; | |
| 82 } | |
| 83 if(NULL == str1) | |
| 84 { | |
| 85 return -1; | |
| 86 } | |
| 87 if(NULL == str2) | |
| 88 { | |
| 89 return 1; | |
| 90 } | |
| 91 | |
| 92 do | |
| 93 { | |
| 94 the_char1 = tolower(str1[i]); | |
| 95 the_char2 = tolower(str2[i]); | |
| 96 if(the_char1 < the_char2) | |
| 97 { | |
| 98 return -1; | |
| 99 } | |
| 100 else if(the_char1 > the_char2) | |
| 101 { | |
| 102 return 1; | |
| 103 } | |
| 104 i++; | |
| 105 } while( (0 != the_char1) && (0 != the_char2) ); | |
| 106 | |
| 107 return 0; | |
| 108 } | |
| 109 | |
| 110 | |
| 111 #ifdef ANDROID_NDK | |
| 112 #include <stdarg.h> | |
| 113 #include <android/log.h> | |
| 114 int SoundDecoder_DebugPrint(const char* format, ...) | |
| 115 { | |
| 116 va_list arg_list; | |
| 117 int ret_val; | |
| 118 | |
| 119 va_start(arg_list, format); | |
| 120 ret_val = __android_log_vprint(ANDROID_LOG_INFO, "SoundDecoder", format, arg_list); | |
| 121 va_end(arg_list); | |
| 122 return ret_val; | |
| 123 } | |
| 124 #endif | |
| 125 | |
| 126 const char* SoundDecoder_GetError() | |
| 127 { | |
| 128 const char* error_string = NULL; | |
| 129 if(NULL == s_errorPool) | |
| 130 { | |
| 131 return "Error: You should not call SoundDecoder_GetError while Sound is not initialized"; | |
| 132 } | |
| 133 error_string = TError_GetLastErrorStr(s_errorPool); | |
| 134 /* SDL returns empty strings instead of NULL */ | |
| 135 if(NULL == error_string) | |
| 136 { | |
| 137 return ""; | |
| 138 } | |
| 139 else | |
| 140 { | |
| 141 return error_string; | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 void SoundDecoder_ClearError() | |
| 146 { | |
| 147 if(NULL == s_errorPool) | |
| 148 { | |
| 149 return; | |
| 150 } | |
| 151 TError_SetError(s_errorPool, 0, NULL); | |
| 152 } | |
| 153 | |
| 154 void SoundDecoder_SetError(const char* err_str, ...) | |
| 155 { | |
| 156 if(NULL == s_errorPool) | |
| 157 { | |
| 158 fprintf(stderr, "Error: You should not call SoundDecoder_SetError while Sound is not initialized\n"); | |
| 159 return; | |
| 160 } | |
| 161 va_list argp; | |
| 162 va_start(argp, err_str); | |
| 163 // SDL_SetError which I'm emulating has no number parameter. | |
| 164 TError_SetErrorv(s_errorPool, 1, err_str, argp); | |
| 165 va_end(argp); | |
| 166 #ifdef ANDROID_NDK | |
| 167 __android_log_print(ANDROID_LOG_INFO, "SoundDecoder_SetError", TError_GetLastErrorStr(s_errorPool)); | |
| 168 #endif | |
| 169 } | |
| 170 | |
| 171 | |
| 172 void SoundDecoder_GetLinkedVersion(SoundDecoder_Version* the_version) | |
| 173 { | |
| 174 if(NULL != the_version) | |
| 175 { | |
| 176 the_version->major = SOUNDDECODER_VER_MAJOR; | |
| 177 the_version->minor = SOUNDDECODER_VER_MINOR; | |
| 178 the_version->patch = SOUNDDECODER_VER_PATCH; | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 | |
| 183 const SoundDecoder_DecoderInfo** SoundDecoder_AvailableDecoders() | |
| 184 { | |
| 185 return(s_availableDecoders); | |
| 186 } | |
| 187 | |
| 188 int SoundDecoder_Init() | |
| 189 { | |
| 190 size_t total_number_of_decoders; | |
| 191 size_t i; | |
| 192 size_t current_pos = 0; | |
| 193 if(1 == s_isInitialized) | |
| 194 { | |
| 195 return 1; | |
| 196 } | |
| 197 if(NULL == s_errorPool) | |
| 198 { | |
| 199 s_errorPool = TError_CreateErrorPool(); | |
| 200 } | |
| 201 if(NULL == s_errorPool) | |
| 202 { | |
| 203 return 0; | |
| 204 } | |
| 205 | |
| 206 total_number_of_decoders = sizeof(s_linkedDecoders) / sizeof(s_linkedDecoders[0]); | |
| 207 s_availableDecoders = (const SoundDecoder_DecoderInfo **)malloc((total_number_of_decoders) * sizeof(SoundDecoder_DecoderInfo*)); | |
| 208 if(NULL == s_availableDecoders) | |
| 209 { | |
| 210 SoundDecoder_SetError(ERR_OUT_OF_MEMORY); | |
| 211 return 0; | |
| 212 } | |
| 213 | |
| 214 /* Allocate memory for linked list of sound samples. */ | |
| 215 s_listOfLoadedSamples = LinkedList_Create(); | |
| 216 if(NULL == s_listOfLoadedSamples) | |
| 217 { | |
| 218 free(s_availableDecoders); | |
| 219 s_availableDecoders = NULL; | |
| 220 SoundDecoder_SetError(ERR_OUT_OF_MEMORY); | |
| 221 return 0; | |
| 222 } | |
| 223 | |
| 224 for(i = 0; s_linkedDecoders[i].funcs != NULL; i++) | |
| 225 { | |
| 226 s_linkedDecoders[i].available = s_linkedDecoders[i].funcs->init(); | |
| 227 if(s_linkedDecoders[i].available) | |
| 228 { | |
| 229 s_availableDecoders[current_pos] = &(s_linkedDecoders[i].funcs->info); | |
| 230 current_pos++; | |
| 231 } | |
| 232 } | |
| 233 | |
| 234 s_availableDecoders[current_pos] = NULL; | |
| 235 s_isInitialized = 1; | |
| 236 return 1; | |
| 237 } | |
| 238 | |
| 239 void SoundDecoder_Quit() | |
| 240 { | |
| 241 size_t i; | |
| 242 if(0 == s_isInitialized) | |
| 243 { | |
| 244 return; | |
| 245 } | |
| 246 | |
| 247 /* | |
| 248 * SDL_sound actually embeds the linked list in the internal data structure. | |
| 249 * So any sample can potentially reach any other sample. | |
| 250 * But I'm keeping my own separate list. | |
| 251 */ | |
| 252 while(LinkedList_Size(s_listOfLoadedSamples) > 0) | |
| 253 { | |
| 254 SoundDecoder_Sample* sound_sample = (SoundDecoder_Sample*)LinkedList_PopBack(s_listOfLoadedSamples); | |
| 255 SoundDecoder_FreeSample(sound_sample); | |
| 256 } | |
| 257 LinkedList_Free(s_listOfLoadedSamples); | |
| 258 s_listOfLoadedSamples = NULL; | |
| 259 | |
| 260 | |
| 261 for(i = 0; s_linkedDecoders[i].funcs != NULL; i++) | |
| 262 { | |
| 263 if (s_linkedDecoders[i].available) | |
| 264 { | |
| 265 s_linkedDecoders[i].funcs->quit(); | |
| 266 s_linkedDecoders[i].available = 0; | |
| 267 } | |
| 268 } | |
| 269 | |
| 270 if(NULL != s_availableDecoders) | |
| 271 { | |
| 272 free(s_availableDecoders); | |
| 273 } | |
| 274 s_availableDecoders = NULL; | |
| 275 | |
| 276 | |
| 277 /* Remember: ALmixer_SetError/GetError calls will not work while this is gone. */ | |
| 278 TError_FreeErrorPool(s_errorPool); | |
| 279 s_errorPool = NULL; | |
| 280 | |
| 281 s_isInitialized = 0; | |
| 282 } | |
| 283 | |
| 284 | |
| 285 void SoundDecoder_FreeSample(SoundDecoder_Sample* sound_sample) | |
| 286 { | |
| 287 SoundDecoder_SampleInternal* sample_internal; | |
| 288 | |
| 289 /* Quit unloads all samples, so it is not possible to free a sample | |
| 290 * when not initialized. | |
| 291 */ | |
| 292 if(0 == s_isInitialized) | |
| 293 { | |
| 294 return; | |
| 295 } | |
| 296 | |
| 297 if(sound_sample == NULL) | |
| 298 { | |
| 299 return; | |
| 300 } | |
| 301 | |
| 302 /* SDL_sound keeps a linked list of all the loaded samples. | |
| 303 * We want to remove the current sample from that list. | |
| 304 */ | |
| 305 LinkedListNode* the_node = LinkedList_Find(s_listOfLoadedSamples, sound_sample, NULL); | |
| 306 if(NULL == the_node) | |
| 307 { | |
| 308 SoundDecoder_SetError("SoundDecoder_FreeSample: Internal Error, sample does not exist in linked list."); | |
| 309 return; | |
| 310 } | |
| 311 LinkedList_Remove(s_listOfLoadedSamples, the_node); | |
| 312 | |
| 313 sample_internal = (SoundDecoder_SampleInternal*)sound_sample->opaque; | |
| 314 | |
| 315 /* Ugh...SDL_sound has a lot of pointers. | |
| 316 * I hope I didn't miss any dynamic memory. | |
| 317 */ | |
| 318 | |
| 319 /* Call close on the decoder */ | |
| 320 sample_internal->funcs->close(sound_sample); | |
| 321 | |
| 322 if(NULL != sample_internal->rw) | |
| 323 { | |
| 324 sample_internal->rw->close(sample_internal->rw); | |
| 325 } | |
| 326 | |
| 327 /* Ooops. The public buffer might be shared with the internal buffer. | |
| 328 * Make sure to not accidentally double delete. | |
| 329 */ | |
| 330 if((NULL != sample_internal->buffer) | |
| 331 && (sample_internal->buffer != sound_sample->buffer) | |
| 332 ) | |
| 333 { | |
| 334 free(sample_internal->buffer); | |
| 335 } | |
| 336 free(sample_internal); | |
| 337 | |
| 338 if(NULL != sound_sample->buffer) | |
| 339 { | |
| 340 free(sound_sample->buffer); | |
| 341 } | |
| 342 free(sound_sample); | |
| 343 } | |
| 344 | |
| 345 | |
| 346 | |
| 347 static int Internal_LoadSample(const SoundDecoder_DecoderFunctions *funcs, | |
| 348 SoundDecoder_Sample* sound_sample, const char *ext | |
| 349 ) | |
| 350 { | |
| 351 SoundDecoder_SampleInternal* internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque; | |
| 352 long current_file_position = internal_sample->rw->seek(internal_sample->rw, 0, SEEK_CUR); | |
| 353 | |
| 354 /* fill in the funcs for this decoder... */ | |
| 355 sound_sample->decoder = &funcs->info; | |
| 356 internal_sample->funcs = funcs; | |
| 357 if (!funcs->open(sound_sample, ext)) | |
| 358 { | |
| 359 internal_sample->rw->seek(internal_sample->rw, current_file_position, SEEK_SET); | |
| 360 return 0; | |
| 361 } | |
| 362 | |
| 363 /* we found a compatible decoder */ | |
| 364 | |
| 365 /* SDL_sound normally goes on to setup a bunch of things to | |
| 366 * support format conversion via SDL APIs. | |
| 367 * I am not porting any of that stuff. | |
| 368 * My goal is to simply setup the struct properties to values | |
| 369 * that will not cause any confusion with other parts of the implementation. | |
| 370 */ | |
| 371 | |
| 372 | |
| 373 if(0 == sound_sample->desired.format) | |
| 374 { | |
| 375 sound_sample->desired.format = sound_sample->actual.format; | |
| 376 } | |
| 377 if(0 == sound_sample->desired.channels) | |
| 378 { | |
| 379 sound_sample->desired.channels = sound_sample->actual.channels; | |
| 380 } | |
| 381 if(0 == sound_sample->desired.rate) | |
| 382 { | |
| 383 sound_sample->desired.rate = sound_sample->actual.rate; | |
| 384 } | |
| 385 | |
| 386 /* I'm a little confused at the difference between the internal | |
| 387 * public buffer. I am going to make them the same. | |
| 388 * I assume I already allocated the public buffer. | |
| 389 */ | |
| 390 internal_sample->buffer = sound_sample->buffer; | |
| 391 internal_sample->buffer_size = sound_sample->buffer_size; | |
| 392 | |
| 393 /* Insert the new sample into the linked list of samples. */ | |
| 394 LinkedList_PushBack(s_listOfLoadedSamples, sound_sample); | |
| 395 | |
| 396 return 1; | |
| 397 } | |
| 398 | |
| 399 | |
| 400 | |
| 401 SoundDecoder_Sample* SoundDecoder_NewSampleFromFile(const char* file_name, | |
| 402 SoundDecoder_AudioInfo* desired_format, | |
| 403 size_t buffer_size) | |
| 404 { | |
| 405 | |
| 406 const char* file_extension; | |
| 407 ALmixer_RWops* rw_ops; | |
| 408 | |
| 409 | |
| 410 if(0 == s_isInitialized) | |
| 411 { | |
| 412 SoundDecoder_SetError(ERR_NOT_INITIALIZED); | |
| 413 return NULL; | |
| 414 } | |
| 415 if(NULL == file_name) | |
| 416 { | |
| 417 SoundDecoder_SetError("No file specified"); | |
| 418 return NULL; | |
| 419 } | |
| 420 | |
| 421 file_extension = strrchr(file_name, '.'); | |
| 422 if(NULL != file_extension) | |
| 423 { | |
| 424 file_extension++; | |
| 425 } | |
| 426 | |
| 427 rw_ops = ALmixer_RWFromFile(file_name, "rb"); | |
| 428 | |
| 429 return SoundDecoder_NewSample(rw_ops, file_extension, desired_format, buffer_size); | |
| 430 } | |
| 431 | |
| 432 | |
| 433 SoundDecoder_Sample* SoundDecoder_NewSample(ALmixer_RWops* rw_ops, const char* file_extension, SoundDecoder_AudioInfo* desired_format, size_t buffer_size) | |
| 434 { | |
| 435 SoundDecoder_Sample* new_sample; | |
| 436 SoundDecoder_SampleInternal* internal_sample; | |
| 437 SoundElement* current_decoder; | |
| 438 | |
| 439 if(0 == s_isInitialized) | |
| 440 { | |
| 441 SoundDecoder_SetError(ERR_NOT_INITIALIZED); | |
| 442 return NULL; | |
| 443 } | |
| 444 if(NULL == rw_ops) | |
| 445 { | |
| 446 SoundDecoder_SetError("No file specified"); | |
| 447 return NULL; | |
| 448 } | |
| 449 | |
| 450 new_sample = (SoundDecoder_Sample*)calloc(1, sizeof(SoundDecoder_Sample)); | |
| 451 if(NULL == new_sample) | |
| 452 { | |
| 453 SoundDecoder_SetError(ERR_OUT_OF_MEMORY); | |
| 454 return NULL; | |
| 455 } | |
| 456 internal_sample = (SoundDecoder_SampleInternal*)calloc(1, sizeof(SoundDecoder_SampleInternal)); | |
| 457 if(NULL == internal_sample) | |
| 458 { | |
| 459 free(new_sample); | |
| 460 SoundDecoder_SetError(ERR_OUT_OF_MEMORY); | |
| 461 return NULL; | |
| 462 } | |
| 463 new_sample->buffer = calloc(1, buffer_size); | |
| 464 if(NULL == new_sample->buffer) | |
| 465 { | |
| 466 free(internal_sample); | |
| 467 free(new_sample); | |
| 468 SoundDecoder_SetError(ERR_OUT_OF_MEMORY); | |
| 469 return NULL; | |
| 470 } | |
| 471 | |
| 472 new_sample->buffer_size = buffer_size; | |
| 473 | |
| 474 if(NULL != desired_format) | |
| 475 { | |
| 476 memcpy(&new_sample->desired, desired_format, sizeof(SoundDecoder_AudioInfo)); | |
| 477 } | |
| 478 | |
| 479 internal_sample->rw = rw_ops; | |
| 480 new_sample->opaque = internal_sample; | |
| 481 | |
| 482 | |
| 483 if(NULL != file_extension) | |
| 484 { | |
| 485 for(current_decoder = &s_linkedDecoders[0]; current_decoder->funcs != NULL; current_decoder++) | |
| 486 { | |
| 487 if(current_decoder->available) | |
| 488 { | |
| 489 const char** decoder_file_extension = current_decoder->funcs->info.extensions; | |
| 490 while(*decoder_file_extension) | |
| 491 { | |
| 492 if(0 == (SoundDecoder_strcasecmp(*decoder_file_extension, file_extension))) | |
| 493 { | |
| 494 if(Internal_LoadSample(current_decoder->funcs, new_sample, file_extension)) | |
| 495 { | |
| 496 return(new_sample); | |
| 497 } | |
| 498 break; /* go to the next decoder */ | |
| 499 } | |
| 500 decoder_file_extension++; | |
| 501 } | |
| 502 } | |
| 503 } | |
| 504 } | |
| 505 | |
| 506 /* no direct file_extensionension match? Try everything we've got... */ | |
| 507 for(current_decoder = &s_linkedDecoders[0]; current_decoder->funcs != NULL; current_decoder++) | |
| 508 { | |
| 509 if(current_decoder->available) | |
| 510 { | |
| 511 int already_tried_decoder = 0; | |
| 512 const char** decoder_file_extension = current_decoder->funcs->info.extensions; | |
| 513 | |
| 514 /* skip decoders we already tried from the above loop */ | |
| 515 while(*decoder_file_extension) | |
| 516 { | |
| 517 if(SoundDecoder_strcasecmp(*decoder_file_extension, file_extension) == 0) | |
| 518 { | |
| 519 already_tried_decoder = 1; | |
| 520 break; | |
| 521 } | |
| 522 decoder_file_extension++; | |
| 523 } | |
| 524 | |
| 525 if(0 == already_tried_decoder) | |
| 526 { | |
| 527 if (Internal_LoadSample(current_decoder->funcs, new_sample, file_extension)) | |
| 528 { | |
| 529 return new_sample; | |
| 530 } | |
| 531 } | |
| 532 } | |
| 533 } | |
| 534 | |
| 535 /* could not find a decoder */ | |
| 536 SoundDecoder_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 537 /* clean up the memory */ | |
| 538 free(new_sample->opaque); | |
| 539 if(NULL != new_sample->buffer) | |
| 540 { | |
| 541 free(new_sample->buffer); | |
| 542 } | |
| 543 free(new_sample); | |
| 544 | |
| 545 rw_ops->close(rw_ops); | |
| 546 return NULL; | |
| 547 } | |
| 548 | |
| 549 | |
| 550 int SoundDecoder_SetBufferSize(SoundDecoder_Sample* sound_sample, size_t new_buffer_size) | |
| 551 { | |
| 552 SoundDecoder_SampleInternal* internal_sample = NULL; | |
| 553 void* new_buffer_ptr = NULL; | |
| 554 | |
| 555 BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0); | |
| 556 BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0); | |
| 557 | |
| 558 internal_sample = ((SoundDecoder_SampleInternal*)sound_sample->opaque); | |
| 559 | |
| 560 | |
| 561 new_buffer_ptr = realloc(sound_sample->buffer, new_buffer_size); | |
| 562 BAIL_IF_MACRO(NULL == new_buffer_ptr, ERR_OUT_OF_MEMORY, 0); | |
| 563 | |
| 564 sound_sample->buffer = new_buffer_ptr; | |
| 565 sound_sample->buffer_size = new_buffer_size; | |
| 566 internal_sample->buffer = sound_sample->buffer; | |
| 567 internal_sample->buffer_size = sound_sample->buffer_size; | |
| 568 | |
| 569 return 1; | |
| 570 } | |
| 571 | |
| 572 | |
| 573 size_t SoundDecoder_Decode(SoundDecoder_Sample* sound_sample) | |
| 574 { | |
| 575 SoundDecoder_SampleInternal* internal_sample = NULL; | |
| 576 size_t bytes_read = 0; | |
| 577 | |
| 578 BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0); | |
| 579 BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0); | |
| 580 BAIL_IF_MACRO(sound_sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREVIOUS_SAMPLE_ERROR, 0); | |
| 581 BAIL_IF_MACRO(sound_sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_ALREADY_AT_EOF_ERROR, 0); | |
| 582 | |
| 583 internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque; | |
| 584 | |
| 585 assert(sound_sample->buffer != NULL); | |
| 586 assert(sound_sample->buffer_size > 0); | |
| 587 assert(internal_sample->buffer != NULL); | |
| 588 assert(internal_sample->buffer_size > 0); | |
| 589 | |
| 590 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 591 sound_sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; | |
| 592 bytes_read = internal_sample->funcs->read(sound_sample); | |
| 593 return bytes_read; | |
| 594 } | |
| 595 | |
| 596 | |
| 597 size_t SoundDecoder_DecodeAll(SoundDecoder_Sample* sound_sample) | |
| 598 { | |
| 599 SoundDecoder_SampleInternal* internal_sample = NULL; | |
| 600 void* data_buffer = NULL; | |
| 601 size_t updated_buffer_size = 0; | |
| 602 | |
| 603 BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0); | |
| 604 BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0); | |
| 605 | |
| 606 /* My original thought was to call SetBufferSize and resize to | |
| 607 * the size needed to hold the entire decoded file utilizing total_time, | |
| 608 * but it appears SDL_sound simply loops on SoundDecoder_Decode. | |
| 609 * I suppose it is possible to partially decode or seek a file, and then | |
| 610 * call DecodeAll so you won't have the whole thing in which case | |
| 611 * my idea would waste memory. | |
| 612 */ | |
| 613 while( (0 == (sound_sample->flags & SOUND_SAMPLEFLAG_EOF) ) | |
| 614 && (0 == (sound_sample->flags & SOUND_SAMPLEFLAG_ERROR)) | |
| 615 ) | |
| 616 { | |
| 617 size_t bytes_decoded = SoundDecoder_Decode(sound_sample); | |
| 618 void* realloced_ptr = realloc(data_buffer, updated_buffer_size + bytes_decoded); | |
| 619 if(NULL == realloced_ptr) | |
| 620 { | |
| 621 sound_sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 622 SoundDecoder_SetError(ERR_OUT_OF_MEMORY); | |
| 623 if(NULL != data_buffer) | |
| 624 { | |
| 625 free(data_buffer); | |
| 626 } | |
| 627 return bytes_decoded; | |
| 628 } | |
| 629 data_buffer = realloced_ptr; | |
| 630 /* copy the chunk of decoded PCM to the end of our new data buffer */ | |
| 631 memcpy( ((char*)data_buffer) + updated_buffer_size, sound_sample->buffer, bytes_decoded ); | |
| 632 updated_buffer_size += bytes_decoded; | |
| 633 } | |
| 634 | |
| 635 internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque; | |
| 636 if(internal_sample->buffer != sound_sample->buffer) | |
| 637 { | |
| 638 free(internal_sample->buffer); | |
| 639 } | |
| 640 free(sound_sample->buffer); | |
| 641 | |
| 642 sound_sample->buffer = data_buffer; | |
| 643 sound_sample->buffer_size = updated_buffer_size; | |
| 644 internal_sample->buffer = sound_sample->buffer; | |
| 645 internal_sample->buffer_size = sound_sample->buffer_size; | |
| 646 | |
| 647 return sound_sample->buffer_size; | |
| 648 } | |
| 649 | |
| 650 | |
| 651 int SoundDecoder_Rewind(SoundDecoder_Sample* sound_sample) | |
| 652 { | |
| 653 SoundDecoder_SampleInternal* internal_sample; | |
| 654 int ret_val; | |
| 655 | |
| 656 BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0); | |
| 657 BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0); | |
| 658 | |
| 659 internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque; | |
| 660 ret_val = internal_sample->funcs->rewind(sound_sample); | |
| 661 if(0 == ret_val) | |
| 662 { | |
| 663 sound_sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 664 SoundDecoder_SetError("Rewind failed"); | |
| 665 return 0; | |
| 666 } | |
| 667 /* reset flags */ | |
| 668 sound_sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; | |
| 669 sound_sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; | |
| 670 sound_sample->flags &= ~SOUND_SAMPLEFLAG_EOF; | |
| 671 | |
| 672 return 1; | |
| 673 } | |
| 674 | |
| 675 | |
| 676 int SoundDecoder_Seek(SoundDecoder_Sample* sound_sample, size_t ms) | |
| 677 { | |
| 678 SoundDecoder_SampleInternal* internal_sample; | |
| 679 int ret_val; | |
| 680 | |
| 681 BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, 0); | |
| 682 BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0); | |
| 683 | |
| 684 BAIL_IF_MACRO(!(sound_sample->flags & SOUND_SAMPLEFLAG_CANSEEK), "Sound sample is not seekable", 0); | |
| 685 | |
| 686 internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque; | |
| 687 ret_val = internal_sample->funcs->seek(sound_sample, ms); | |
| 688 if(0 == ret_val) | |
| 689 { | |
| 690 sound_sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 691 SoundDecoder_SetError("Seek failed"); | |
| 692 return 0; | |
| 693 } | |
| 694 /* reset flags */ | |
| 695 sound_sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; | |
| 696 sound_sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; | |
| 697 sound_sample->flags &= ~SOUND_SAMPLEFLAG_EOF; | |
| 698 | |
| 699 return 1; | |
| 700 } | |
| 701 | |
| 702 | |
| 703 ptrdiff_t SoundDecoder_GetDuration(SoundDecoder_Sample* sound_sample) | |
| 704 { | |
| 705 SoundDecoder_SampleInternal* internal_sample; | |
| 706 BAIL_IF_MACRO(!s_isInitialized, ERR_NOT_INITIALIZED, -1); | |
| 707 BAIL_IF_MACRO(NULL == sound_sample, ERR_NULL_SAMPLE, 0); | |
| 708 internal_sample = (SoundDecoder_SampleInternal*)sound_sample->opaque; | |
| 709 return internal_sample->total_time; | |
| 710 } | |
| 711 | |
| 712 #endif |