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 <stdlib.h> 18 #include <stdio.h> 19 #include <string.h> 20 #include <unistd.h> 21 #include <sys/time.h> 22 23 #include "SLES/OpenSLES.h" 24 25 26 #define MAX_NUMBER_INTERFACES 3 27 28 #define REPETITIONS 4 // 4 repetitions, but will stop the looping before the end 29 30 #define INITIAL_RATE 2000 // 2x normal playback speed 31 32 //----------------------------------------------------------------- 33 //* Exits the application if an error is encountered */ 34 #define CheckErr(x) ExitOnErrorFunc(x,__LINE__) 35 36 void ExitOnErrorFunc( SLresult result , int line) 37 { 38 if (SL_RESULT_SUCCESS != result) { 39 fprintf(stderr, "%lu error code encountered at line %d, exiting\n", result, line); 40 exit(EXIT_FAILURE); 41 } 42 } 43 44 //----------------------------------------------------------------- 45 /* PlayItf callback for an audio player */ 46 void PlayEventCallback( SLPlayItf caller, void *pContext, SLuint32 event) 47 { 48 fprintf(stdout, "PlayEventCallback event = "); 49 if (event & SL_PLAYEVENT_HEADATEND) { 50 fprintf(stdout, "SL_PLAYEVENT_HEADATEND \n"); 51 /* slow playback down by 2x for next loop, if possible */ 52 SLpermille minRate, maxRate, stepSize, rate = 1000; 53 SLuint32 capa; 54 SLPlaybackRateItf* pRateItf = (SLPlaybackRateItf*)pContext; 55 SLresult res = (**pRateItf)->GetRate(*pRateItf, &rate); CheckErr(res); 56 res = (**pRateItf)->GetRateRange(*pRateItf, 0, &minRate, &maxRate, &stepSize, &capa); 57 CheckErr(res); 58 fprintf(stdout, "old rate = %d, minRate=%d, maxRate=%d\n", rate, minRate, maxRate); 59 rate /= 2; 60 if (rate < minRate) { 61 rate = minRate; 62 } 63 fprintf(stdout, "new rate = %d\n", rate); 64 res = (**pRateItf)->SetRate(*pRateItf, rate); CheckErr(res); 65 } 66 if (event & SL_PLAYEVENT_HEADATMARKER) { 67 fprintf(stdout, "SL_PLAYEVENT_HEADATMARKER "); 68 } 69 if (event & SL_PLAYEVENT_HEADATNEWPOS) { 70 fprintf(stdout, "SL_PLAYEVENT_HEADATNEWPOS "); 71 } 72 if (event & SL_PLAYEVENT_HEADMOVING) { 73 fprintf(stdout, "SL_PLAYEVENT_HEADMOVING "); 74 } 75 if (event & SL_PLAYEVENT_HEADSTALLED) { 76 fprintf(stdout, "SL_PLAYEVENT_HEADSTALLED"); 77 } 78 fprintf(stdout, "\n"); 79 } 80 81 //----------------------------------------------------------------- 82 /* PrefetchStatusItf callback for an audio player */ 83 void PrefetchEventCallback( SLPrefetchStatusItf caller, void *pContext, SLuint32 event) 84 { 85 SLpermille level = 0; 86 (*caller)->GetFillLevel(caller, &level); 87 SLuint32 status; 88 //fprintf(stdout, "\t\tPrefetchEventCallback: received event %lu\n", event); 89 (*caller)->GetPrefetchStatus(caller, &status); 90 if ((event & (SL_PREFETCHEVENT_STATUSCHANGE|SL_PREFETCHEVENT_FILLLEVELCHANGE)) 91 && (level == 0) && (status == SL_PREFETCHSTATUS_UNDERFLOW)) { 92 fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n"); 93 //exit(EXIT_FAILURE); 94 } 95 if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) { 96 fprintf(stdout, "\t\tPrefetchEventCallback: Buffer fill level is = %d\n", level); 97 } 98 if (event & SL_PREFETCHEVENT_STATUSCHANGE) { 99 fprintf(stdout, "\t\tPrefetchEventCallback: Prefetch Status is = %lu\n", status); 100 } 101 102 } 103 104 105 //----------------------------------------------------------------- 106 107 /* Play some music from a URI */ 108 void TestSlowDownUri( SLObjectItf sl, const char* path) 109 { 110 SLEngineItf EngineItf; 111 112 SLint32 numOutputs = 0; 113 SLuint32 deviceID = 0; 114 115 SLresult res; 116 117 SLDataSource audioSource; 118 SLDataLocator_URI uri; 119 SLDataFormat_MIME mime; 120 121 SLDataSink audioSink; 122 SLDataLocator_OutputMix locator_outputmix; 123 124 SLObjectItf player; 125 SLPlayItf playItf; 126 SLSeekItf seekItf; 127 SLPrefetchStatusItf prefetchItf; 128 SLPlaybackRateItf rateItf; 129 130 SLObjectItf OutputMix; 131 132 SLboolean required[MAX_NUMBER_INTERFACES]; 133 SLInterfaceID iidArray[MAX_NUMBER_INTERFACES]; 134 135 /* Get the SL Engine Interface which is implicit */ 136 res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf); CheckErr(res); 137 138 /* Initialize arrays required[] and iidArray[] */ 139 for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) { 140 required[i] = SL_BOOLEAN_FALSE; 141 iidArray[i] = SL_IID_NULL; 142 } 143 144 required[0] = SL_BOOLEAN_TRUE; 145 iidArray[0] = SL_IID_VOLUME; 146 // Create Output Mix object to be used by player 147 res = (*EngineItf)->CreateOutputMix(EngineItf, &OutputMix, 0, 148 iidArray, required); CheckErr(res); 149 150 // Realizing the Output Mix object in synchronous mode. 151 res = (*OutputMix)->Realize(OutputMix, SL_BOOLEAN_FALSE); CheckErr(res); 152 153 /* Setup the data source structure for the URI */ 154 uri.locatorType = SL_DATALOCATOR_URI; 155 uri.URI = (SLchar*) path; 156 mime.formatType = SL_DATAFORMAT_MIME; 157 mime.mimeType = (SLchar*)NULL; 158 mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED; 159 160 audioSource.pFormat = (void *)&mime; 161 audioSource.pLocator = (void *)&uri; 162 163 /* Setup the data sink structure */ 164 locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX; 165 locator_outputmix.outputMix = OutputMix; 166 audioSink.pLocator = (void *)&locator_outputmix; 167 audioSink.pFormat = NULL; 168 169 /******************************************************/ 170 /* Create the audio player */ 171 required[0] = SL_BOOLEAN_TRUE; 172 iidArray[0] = SL_IID_SEEK; 173 required[1] = SL_BOOLEAN_TRUE; 174 iidArray[1] = SL_IID_PREFETCHSTATUS; 175 required[2] = SL_BOOLEAN_TRUE; 176 iidArray[2] = SL_IID_PLAYBACKRATE; 177 res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink, 178 MAX_NUMBER_INTERFACES, iidArray, required); CheckErr(res); 179 180 /* Realizing the player in synchronous mode. */ 181 res = (*player)->Realize(player, SL_BOOLEAN_FALSE); CheckErr(res); 182 fprintf(stdout, "URI example: after Realize\n"); 183 184 /* Get interfaces */ 185 res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf); CheckErr(res); 186 187 res = (*player)->GetInterface(player, SL_IID_SEEK, (void*)&seekItf); CheckErr(res); 188 189 res = (*player)->GetInterface(player, SL_IID_PLAYBACKRATE, (void*)&rateItf); CheckErr(res); 190 191 res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf); 192 CheckErr(res); 193 res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, &prefetchItf); 194 CheckErr(res); 195 res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf, 196 SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE); CheckErr(res); 197 198 /* Configure fill level updates every 5 percent */ 199 (*prefetchItf)->SetFillUpdatePeriod(prefetchItf, 50); CheckErr(res); 200 201 /* Display duration */ 202 SLmillisecond durationInMsec = SL_TIME_UNKNOWN; 203 res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res); 204 if (durationInMsec == SL_TIME_UNKNOWN) { 205 fprintf(stdout, "Content duration is unknown (before starting to prefetch)\n"); 206 } else { 207 fprintf(stdout, "Content duration is %lu ms (before starting to prefetch)\n", 208 durationInMsec); 209 } 210 211 /* Loop on the whole of the content */ 212 res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN); CheckErr(res); 213 214 /* Set up marker and position callbacks */ 215 res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, &rateItf); CheckErr(res); 216 res = (*playItf)->SetCallbackEventsMask(playItf, 217 SL_PLAYEVENT_HEADATEND | SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS); 218 res = (*playItf)->SetMarkerPosition(playItf, 1500); CheckErr(res); 219 res = (*playItf)->SetPositionUpdatePeriod(playItf, 500); CheckErr(res); 220 221 /* Change the playback rate before playback */ 222 res = (*rateItf)->SetRate(rateItf, INITIAL_RATE); CheckErr(res); 223 224 /******************************************************/ 225 /* Play the URI */ 226 /* first cause the player to prefetch the data */ 227 res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); CheckErr(res); 228 229 /* wait until there's data to play */ 230 SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW; 231 SLuint32 timeOutIndex = 100; // 10s 232 while ((prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) && (timeOutIndex > 0)) { 233 usleep(100 * 1000); 234 (*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus); 235 timeOutIndex--; 236 } 237 238 if (timeOutIndex == 0) { 239 fprintf(stderr, "\nWe\'re done waiting, failed to prefetch data in time, exiting\n"); 240 goto destroyRes; 241 } 242 243 /* Display duration again, */ 244 res = (*playItf)->GetDuration(playItf, &durationInMsec); CheckErr(res); 245 if (durationInMsec == SL_TIME_UNKNOWN) { 246 fprintf(stdout, "Content duration is unknown (after prefetch completed)\n"); 247 } else { 248 fprintf(stdout, "Content duration is %lu ms (after prefetch completed)\n", durationInMsec); 249 } 250 251 fprintf(stdout, "starting to play\n"); 252 res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING ); CheckErr(res); 253 254 /* Wait as long as the duration of the content, times the repetitions, 255 * before stopping the loop */ 256 usleep( (REPETITIONS-1) * durationInMsec * 1100); 257 res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_FALSE, 0, SL_TIME_UNKNOWN); CheckErr(res); 258 fprintf(stdout, "As of now, stopped looping (sound shouldn't repeat from now on)\n"); 259 /* wait some more to make sure it doesn't repeat */ 260 usleep(durationInMsec * 1000); 261 262 /* Stop playback */ 263 fprintf(stdout, "stopping playback\n"); 264 res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED); CheckErr(res); 265 266 destroyRes: 267 268 /* Destroy the player */ 269 (*player)->Destroy(player); 270 271 /* Destroy Output Mix object */ 272 (*OutputMix)->Destroy(OutputMix); 273 } 274 275 //----------------------------------------------------------------- 276 int main(int argc, char* const argv[]) 277 { 278 SLresult res; 279 SLObjectItf sl; 280 281 fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLSeekItf, SLPlaybackRateItf\n", 282 argv[0]); 283 fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n"); 284 fprintf(stdout, "Plays a sound and loops it %d times while changing the \n", REPETITIONS); 285 fprintf(stdout, "playback rate each time.\n\n"); 286 287 if (argc == 1) { 288 fprintf(stdout, "Usage: \n\t%s path \n\t%s url\n", argv[0], argv[0]); 289 fprintf(stdout, "Example: \"%s /sdcard/my.mp3\" or \"%s file:///sdcard/my.mp3\"\n", 290 argv[0], argv[0]); 291 return EXIT_FAILURE; 292 } 293 294 SLEngineOption EngineOption[] = { 295 {(SLuint32) SL_ENGINEOPTION_THREADSAFE, 296 (SLuint32) SL_BOOLEAN_TRUE}}; 297 298 res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL); 299 CheckErr(res); 300 /* Realizing the SL Engine in synchronous mode. */ 301 res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE); 302 CheckErr(res); 303 304 TestSlowDownUri(sl, argv[1]); 305 306 /* Shutdown OpenSL ES */ 307 (*sl)->Destroy(sl); 308 309 return EXIT_SUCCESS; 310 } 311
