1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <assert.h> 18#include <pthread.h> 19#include <stdlib.h> 20#include <stdio.h> 21#include <string.h> 22#include <unistd.h> 23#include <sys/time.h> 24 25#include <SLES/OpenSLES.h> 26 27 28#define MAX_NUMBER_INTERFACES 3 29 30#define REPETITIONS 4 // 4 repetitions, but will stop the looping before the end 31 32#define INITIAL_RATE 2000 // 2x normal playback speed 33 34// These are extensions to OpenSL ES 1.0.1 values 35 36#define SL_PREFETCHSTATUS_UNKNOWN 0 37#define SL_PREFETCHSTATUS_ERROR ((SLuint32) -1) 38 39// Mutex and condition shared with main program to protect prefetch_status 40 41static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; 42static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; 43SLuint32 prefetch_status = SL_PREFETCHSTATUS_UNKNOWN; 44 45/* used to detect errors likely to have occured when the OpenSL ES framework fails to open 46 * a resource, for instance because a file URI is invalid, or an HTTP server doesn't respond. 47 */ 48#define PREFETCHEVENT_ERROR_CANDIDATE \ 49 (SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE) 50 51//----------------------------------------------------------------- 52//* Exits the application if an error is encountered */ 53#define CheckErr(x) ExitOnErrorFunc(x,__LINE__) 54 55void ExitOnErrorFunc( SLresult result , int line) 56{ 57 if (SL_RESULT_SUCCESS != result) { 58 fprintf(stderr, "%u error code encountered at line %d, exiting\n", result, line); 59 exit(EXIT_FAILURE); 60 } 61} 62 63//----------------------------------------------------------------- 64/* PlayItf callback for an audio player */ 65void PlayEventCallback( SLPlayItf caller __unused, void *pContext, SLuint32 event) 66{ 67 fprintf(stdout, "PlayEventCallback event = "); 68 if (event & SL_PLAYEVENT_HEADATEND) { 69 fprintf(stdout, "SL_PLAYEVENT_HEADATEND \n"); 70 /* slow playback down by 2x for next loop, if possible */ 71 SLpermille minRate, maxRate, stepSize, rate = 1000; 72 SLuint32 capa; 73 assert(NULL != pContext); 74 SLPlaybackRateItf pRateItf = (SLPlaybackRateItf)pContext; 75 SLresult res = (*pRateItf)->GetRate(pRateItf, &rate); CheckErr(res); 76 res = (*pRateItf)->GetRateRange(pRateItf, 0, &minRate, &maxRate, &stepSize, &capa); 77 CheckErr(res); 78 fprintf(stdout, "old rate = %d, minRate=%d, maxRate=%d\n", rate, minRate, maxRate); 79 rate /= 2; 80 if (rate < minRate) { 81 rate = minRate; 82 } 83 fprintf(stdout, "new rate = %d\n", rate); 84 res = (*pRateItf)->SetRate(pRateItf, rate); CheckErr(res); 85 if (res == SL_RESULT_FEATURE_UNSUPPORTED) { 86 fprintf(stderr, "new playback rate %d per mille is unsupported\n", rate); 87 } else { 88 CheckErr(res); 89 } 90 } 91 if (event & SL_PLAYEVENT_HEADATMARKER) { 92 fprintf(stdout, "SL_PLAYEVENT_HEADATMARKER "); 93 } 94 if (event & SL_PLAYEVENT_HEADATNEWPOS) { 95 fprintf(stdout, "SL_PLAYEVENT_HEADATNEWPOS "); 96 } 97 if (event & SL_PLAYEVENT_HEADMOVING) { 98 fprintf(stdout, "SL_PLAYEVENT_HEADMOVING "); 99 } 100 if (event & SL_PLAYEVENT_HEADSTALLED) { 101 fprintf(stdout, "SL_PLAYEVENT_HEADSTALLED"); 102 } 103 fprintf(stdout, "\n"); 104} 105 106//----------------------------------------------------------------- 107/* PrefetchStatusItf callback for an audio player */ 108void PrefetchEventCallback( SLPrefetchStatusItf caller, void *pContext, SLuint32 event) 109{ 110 //fprintf(stdout, "\t\tPrefetchEventCallback: received event %u\n", event); 111 SLresult result; 112 assert(pContext == NULL); 113 SLpermille level = 0; 114 result = (*caller)->GetFillLevel(caller, &level); 115 CheckErr(result); 116 SLuint32 status; 117 result = (*caller)->GetPrefetchStatus(caller, &status); 118 CheckErr(result); 119 if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) { 120 fprintf(stdout, "\t\tPrefetchEventCallback: Buffer fill level is = %d\n", level); 121 } 122 if (event & SL_PREFETCHEVENT_STATUSCHANGE) { 123 fprintf(stdout, "\t\tPrefetchEventCallback: Prefetch Status is = %u\n", status); 124 } 125 SLuint32 new_prefetch_status; 126 if ((event & PREFETCHEVENT_ERROR_CANDIDATE) == PREFETCHEVENT_ERROR_CANDIDATE 127 && level == 0 && status == SL_PREFETCHSTATUS_UNDERFLOW) { 128 fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n"); 129 new_prefetch_status = SL_PREFETCHSTATUS_ERROR; 130 } else if (event == SL_PREFETCHEVENT_STATUSCHANGE && 131 status == SL_PREFETCHSTATUS_SUFFICIENTDATA) { 132 new_prefetch_status = status; 133 } else { 134 return; 135 } 136 int ok; 137 ok = pthread_mutex_lock(&mutex); 138 assert(ok == 0); 139 prefetch_status = new_prefetch_status; 140 ok = pthread_cond_signal(&cond); 141 assert(ok == 0); 142 ok = pthread_mutex_unlock(&mutex); 143 assert(ok == 0); 144} 145 146// Display rate capabilities in a nicely formatted way 147 148void printCapabilities(SLuint32 capabilities) 149{ 150 bool needBar = false; 151 printf("0x%x (", capabilities); 152#define _(x) \ 153 if (capabilities & SL_RATEPROP_##x) { \ 154 if (needBar) \ 155 printf("|"); \ 156 printf("SL_RATEPROP_" #x); \ 157 needBar = true; \ 158 capabilities &= ~SL_RATEPROP_##x; \ 159 } 160 _(SILENTAUDIO) 161 _(STAGGEREDAUDIO) 162 _(NOPITCHCORAUDIO) 163 _(PITCHCORAUDIO) 164 if (capabilities != 0) { 165 if (needBar) 166 printf("|"); 167 printf("0x%x", capabilities); 168 needBar = true; 169 } 170 if (!needBar) 171 printf("N/A"); 172 printf(")"); 173} 174 175//----------------------------------------------------------------- 176 177/* Play some music from a URI */ 178void TestSlowDownUri( SLObjectItf sl, const char* path) 179{ 180 SLEngineItf EngineItf; 181 182 SLresult res; 183 184 SLDataSource audioSource; 185 SLDataLocator_URI uri; 186 SLDataFormat_MIME mime; 187 188 SLDataSink audioSink; 189 SLDataLocator_OutputMix locator_outputmix; 190 191 SLObjectItf player; 192 SLPlayItf playItf; 193 SLSeekItf seekItf; 194 SLPrefetchStatusItf prefetchItf; 195 SLPlaybackRateItf rateItf; 196 197 SLObjectItf OutputMix; 198 199 SLboolean required[MAX_NUMBER_INTERFACES]; 200 SLInterfaceID iidArray[MAX_NUMBER_INTERFACES]; 201 202 /* Get the SL Engine Interface which is implicit */ 203 res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf); CheckErr(res); 204 205 /* Initialize arrays required[] and iidArray[] */ 206 for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) { 207 required[i] = SL_BOOLEAN_FALSE; 208 iidArray[i] = SL_IID_NULL; 209 } 210 211 required[0] = SL_BOOLEAN_TRUE; 212 iidArray[0] = SL_IID_VOLUME; 213 // Create Output Mix object to be used by player 214 res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0, 215 iidArray, required); CheckErr(res); 216 217 // Realizing the Output Mix object in synchronous mode. 218 res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE); CheckErr(res); 219 220 /* Setup the data source structure for the URI */ 221 uri.locatorType = SL_DATALOCATOR_URI; 222 uri.URI = (SLchar*) path; 223 mime.formatType = SL_DATAFORMAT_MIME; 224 mime.mimeType = (SLchar*)NULL; 225 mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED; 226 227 audioSource.pFormat = (void *)&mime; 228 audioSource.pLocator = (void *)&uri; 229 230 /* Setup the data sink structure */ 231 locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX; 232 locator_outputmix.outputMix = OutputMix; 233 audioSink.pLocator = (void *)&locator_outputmix; 234 audioSink.pFormat = NULL; 235 236 /******************************************************/ 237 /* Create the audio player */ 238 required[0] = SL_BOOLEAN_TRUE; 239 iidArray[0] = SL_IID_SEEK; 240 required[1] = SL_BOOLEAN_TRUE; 241 iidArray[1] = SL_IID_PREFETCHSTATUS; 242 required[2] = SL_BOOLEAN_TRUE; 243 iidArray[2] = SL_IID_PLAYBACKRATE; 244 res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink, 245 MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res); 246 247 /* Realizing the player in synchronous mode. */ 248 res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res); 249 fprintf(stdout, "URI example: after Realize\n"); 250 251 /* Get interfaces */ 252 res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf); CheckErr(res); 253 254 res = (*player)->GetInterface(player, SL_IID_SEEK, (void*)&seekItf); CheckErr(res); 255 256 res = (*player)->GetInterface(player, SL_IID_PLAYBACKRATE, (void*)&rateItf); CheckErr(res); 257 258 res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf); 259 CheckErr(res); 260 res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, NULL); 261 CheckErr(res); 262 res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf, 263 SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE); CheckErr(res); 264 265 /* Configure fill level updates every 5 percent */ 266 (*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50); CheckErr(res); 267 268 /* Display duration */ 269 SLmillisecond durationInMsec = SL_TIME_UNKNOWN; 270 res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res); 271 if (durationInMsec == SL_TIME_UNKNOWN) { 272 fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n"); 273 } else { 274 fprintf(stdout, "Content duration is %u ms (before starting to prefetch)\n", 275 durationInMsec); 276 } 277 278 /* Loop on the whole of the content */ 279 res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN); CheckErr(res); 280 281 /* Set up marker and position callbacks */ 282 res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, (void *) rateItf); 283 CheckErr(res); 284 res = (*playItf)->SetCallbackEventsMask(playItf, 285 SL_PLAYEVENT_HEADATEND | SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS); 286 res = (*playItf)->SetMarkerPosition(playItf, 1500); CheckErr(res); 287 res = (*playItf)->SetPositionUpdatePeriod(playItf, 500); CheckErr(res); 288 289 /* Get the default rate */ 290 SLpermille rate = 1234; 291 res = (*rateItf)->GetRate(rateItf, &rate); CheckErr(res); 292 printf("default rate = %d per mille\n", rate); 293 assert(1000 == rate); 294 295 /* Get the default rate properties */ 296 SLuint32 properties = 0; 297 res = (*rateItf)->GetProperties(rateItf, &properties); CheckErr(res); 298 printf("default rate properties: "); 299 printCapabilities(properties); 300 printf("\n"); 301 assert(SL_RATEPROP_NOPITCHCORAUDIO == properties); 302 303 /* Get all supported playback rate ranges */ 304 SLuint8 index; 305 for (index = 0; ; ++index) { 306 SLpermille minRate, maxRate, stepSize; 307 SLuint32 capabilities; 308 res = (*rateItf)->GetRateRange(rateItf, index, &minRate, &maxRate, &stepSize, 309 &capabilities); 310 if (res == SL_RESULT_PARAMETER_INVALID) { 311 if (index == 0) { 312 fprintf(stderr, "implementation supports no rate ranges\n"); 313 } 314 break; 315 } 316 CheckErr(res); 317 if (index == 255) { 318 fprintf(stderr, "implementation supports way too many rate ranges, I'm giving up\n"); 319 break; 320 } 321 printf("range[%u]: min=%d, max=%d, capabilities=", index, minRate, maxRate); 322 printCapabilities(capabilities); 323 printf("\n"); 324 } 325 326 /* Change the playback rate before playback */ 327 res = (*rateItf)->SetRate(rateItf, INITIAL_RATE); 328 if (res == SL_RESULT_FEATURE_UNSUPPORTED || res == SL_RESULT_PARAMETER_INVALID) { 329 fprintf(stderr, "initial playback rate %d per mille is unsupported\n", INITIAL_RATE); 330 } else { 331 CheckErr(res); 332 } 333 334 /******************************************************/ 335 /* Play the URI */ 336 /* first cause the player to prefetch the data */ 337 res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); CheckErr(res); 338 339 // wait for prefetch status callback to indicate either sufficient data or error 340 pthread_mutex_lock(&mutex); 341 while (prefetch_status == SL_PREFETCHSTATUS_UNKNOWN) { 342 pthread_cond_wait(&cond, &mutex); 343 } 344 pthread_mutex_unlock(&mutex); 345 if (prefetch_status == SL_PREFETCHSTATUS_ERROR) { 346 fprintf(stderr, "Error during prefetch, exiting\n"); 347 goto destroyRes; 348 } 349 350 /* Display duration again, */ 351 res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res); 352 if (durationInMsec == SL_TIME_UNKNOWN) { 353 fprintf(stdout, "Content duration is unknown (after prefetch completed)\n"); 354 } else { 355 fprintf(stdout, "Content duration is %u ms (after prefetch completed)\n", durationInMsec); 356 } 357 358 /* Start playing */ 359 fprintf(stdout, "starting to play\n"); 360 res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING ); CheckErr(res); 361 362 /* Wait as long as the duration of the content, times the repetitions, 363 * before stopping the loop */ 364#if 1 365 usleep( (REPETITIONS-1) * durationInMsec * 1100); 366#else 367 int ii; 368 for (ii = 0; ii < REPETITIONS; ++ii) { 369 usleep(durationInMsec * 1100); 370 PlayEventCallback(playItf, (void *) rateItf, SL_PLAYEVENT_HEADATEND); 371 } 372#endif 373 374 res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_FALSE, 0, SL_TIME_UNKNOWN); CheckErr(res); 375 fprintf(stdout, "As of now, stopped looping (sound shouldn't repeat from now on)\n"); 376 /* wait some more to make sure it doesn't repeat */ 377 usleep(durationInMsec * 1000); 378 379 /* Stop playback */ 380 fprintf(stdout, "stopping playback\n"); 381 res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED); CheckErr(res); 382 383destroyRes: 384 385 /* Destroy the player */ 386 (*player)->Destroy(player); 387 388 /* Destroy Output Mix object */ 389 (*OutputMix)->Destroy(OutputMix); 390} 391 392//----------------------------------------------------------------- 393int main(int argc, char* const argv[]) 394{ 395 SLresult res; 396 SLObjectItf sl; 397 398 fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLSeekItf, SLPlaybackRateItf\n", 399 argv[0]); 400 fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n"); 401 fprintf(stdout, "Plays a sound and loops it %d times while changing the \n", REPETITIONS); 402 fprintf(stdout, "playback rate each time.\n\n"); 403 404 if (argc == 1) { 405 fprintf(stdout, "Usage: \n\t%s path \n\t%s url\n", argv[0], argv[0]); 406 fprintf(stdout, "Example: \"%s /sdcard/my.mp3\" or \"%s file:///sdcard/my.mp3\"\n", 407 argv[0], argv[0]); 408 return EXIT_FAILURE; 409 } 410 411 SLEngineOption EngineOption[] = { 412 {(SLuint32) SL_ENGINEOPTION_THREADSAFE, 413 (SLuint32) SL_BOOLEAN_TRUE}}; 414 415 res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL); 416 CheckErr(res); 417 /* Realizing the SL Engine in synchronous mode. */ 418 res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE); 419 CheckErr(res); 420 421 TestSlowDownUri(sl, argv[1]); 422 423 /* Shutdown OpenSL ES */ 424 (*sl)->Destroy(sl); 425 426 return EXIT_SUCCESS; 427} 428