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 <unistd.h> 20 21 #include <SLES/OpenSLES.h> 22 23 24 #define MAX_NUMBER_INTERFACES 3 25 26 27 //----------------------------------------------------------------- 28 /* Exits the application if an error is encountered */ 29 void ExitOnError( SLresult result ) 30 { 31 if (SL_RESULT_SUCCESS != result) { 32 fprintf(stdout, "%u error code encountered, exiting\n", result); 33 exit(EXIT_FAILURE); 34 } 35 } 36 37 //----------------------------------------------------------------- 38 /* PlayItf callback for an audio player */ 39 void PlayEventCallback( SLPlayItf caller __unused, void *pContext __unused, SLuint32 event) 40 { 41 fprintf(stdout, "PlayEventCallback event = "); 42 if (event & SL_PLAYEVENT_HEADATEND) { 43 fprintf(stdout, "SL_PLAYEVENT_HEADATEND "); 44 } 45 if (event & SL_PLAYEVENT_HEADATMARKER) { 46 fprintf(stdout, "SL_PLAYEVENT_HEADATMARKER "); 47 } 48 if (event & SL_PLAYEVENT_HEADATNEWPOS) { 49 fprintf(stdout, "SL_PLAYEVENT_HEADATNEWPOS "); 50 } 51 if (event & SL_PLAYEVENT_HEADMOVING) { 52 fprintf(stdout, "SL_PLAYEVENT_HEADMOVING "); 53 } 54 if (event & SL_PLAYEVENT_HEADSTALLED) { 55 fprintf(stdout, "SL_PLAYEVENT_HEADSTALLED"); 56 } 57 fprintf(stdout, "\n"); 58 } 59 60 //----------------------------------------------------------------- 61 62 /* Play two audio URIs, pan them left and right */ 63 void TestPlayUri( SLObjectItf sl, const char* path, const char* path2) 64 { 65 SLresult result; 66 SLEngineItf EngineItf; 67 68 /* Objects this application uses: two players and an ouput mix */ 69 SLObjectItf player, player2, outputMix; 70 71 /* Source of audio data to play, we'll reuse the same source for two different players */ 72 SLDataSource audioSource; 73 SLDataLocator_URI uri; 74 SLDataFormat_MIME mime; 75 76 /* Data sinks for the two audio players */ 77 SLDataSink audioSink; 78 SLDataLocator_OutputMix locator_outputmix; 79 80 /* Play, Volume and PrefetchStatus interfaces for the audio players */ 81 SLPlayItf playItf, playItf2; 82 SLVolumeItf volItf, volItf2; 83 SLPrefetchStatusItf prefetchItf, prefetchItf2; 84 85 SLboolean required[MAX_NUMBER_INTERFACES]; 86 SLInterfaceID iidArray[MAX_NUMBER_INTERFACES]; 87 88 /* Get the SL Engine Interface which is implicit */ 89 result = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf); 90 ExitOnError(result); 91 92 /* Initialize arrays required[] and iidArray[] */ 93 for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) { 94 required[i] = SL_BOOLEAN_FALSE; 95 iidArray[i] = SL_IID_NULL; 96 } 97 /* Set arrays required[] and iidArray[] for SLVolumeItf and SLPrefetchStatusItf interfaces */ 98 /* (SLPlayItf is implicit) */ 99 required[0] = SL_BOOLEAN_TRUE; 100 iidArray[0] = SL_IID_VOLUME; 101 required[1] = SL_BOOLEAN_TRUE; 102 iidArray[1] = SL_IID_PREFETCHSTATUS; 103 104 /* ------------------------------------------------------ */ 105 /* Configuration of the output mix */ 106 107 /* Create Output Mix object to be used each player */ 108 result = (*EngineItf)->CreateOutputMix(EngineItf, &outputMix, 0, iidArray, required); 109 ExitOnError(result); 110 111 /* Realize the Output Mix object in synchronous mode */ 112 result = (*outputMix)->Realize(outputMix, SL_BOOLEAN_FALSE); 113 ExitOnError(result); 114 115 /* Setup the data sink structure */ 116 locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX; 117 locator_outputmix.outputMix = outputMix; 118 audioSink.pLocator = (void *)&locator_outputmix; 119 audioSink.pFormat = NULL; 120 121 /* ------------------------------------------------------ */ 122 /* Configuration of the players */ 123 124 /* Setup the data source structure for the first URI */ 125 uri.locatorType = SL_DATALOCATOR_URI; 126 uri.URI = (SLchar*) path; 127 mime.formatType = SL_DATAFORMAT_MIME; 128 /* this is how ignored mime information is specified, according to OpenSL ES spec 129 * in 9.1.6 SLDataFormat_MIME and 8.23 SLMetadataTraversalItf GetChildInfo */ 130 mime.mimeType = (SLchar*)NULL; 131 mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED; 132 133 audioSource.pFormat = (void *)&mime; 134 audioSource.pLocator = (void *)&uri; 135 136 /* Create the first audio player */ 137 result = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink, 2, 138 iidArray, required); 139 ExitOnError(result); 140 141 /* Create the second audio player with a different path for its data source */ 142 uri.URI = (SLchar*) path2; 143 audioSource.pLocator = (void *)&uri; 144 result = (*EngineItf)->CreateAudioPlayer(EngineItf, &player2, &audioSource, &audioSink, 2, 145 iidArray, required); 146 ExitOnError(result); 147 148 /* Realize the players in synchronous mode. */ 149 result = (*player)->Realize(player, SL_BOOLEAN_FALSE); ExitOnError(result); 150 result = (*player)->Realize(player2, SL_BOOLEAN_FALSE); ExitOnError(result); 151 //fprintf(stdout, "URI example: after Realize\n"); 152 153 /* Get the SLPlayItf, SLVolumeItf and SLPrefetchStatusItf interfaces for each player */ 154 result = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf); 155 ExitOnError(result); 156 result = (*player)->GetInterface(player2, SL_IID_PLAY, (void*)&playItf2); 157 ExitOnError(result); 158 159 result = (*player)->GetInterface(player, SL_IID_VOLUME, (void*)&volItf); 160 ExitOnError(result); 161 result = (*player2)->GetInterface(player2, SL_IID_VOLUME, (void*)&volItf2); 162 ExitOnError(result); 163 164 result = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf); 165 ExitOnError(result); 166 result = (*player2)->GetInterface(player2, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf2); 167 ExitOnError(result); 168 169 /* Setup to receive playback events */ 170 result = (*playItf)->RegisterCallback(playItf, PlayEventCallback, &playItf); 171 ExitOnError(result); 172 result = (*playItf)->SetCallbackEventsMask(playItf, 173 SL_PLAYEVENT_HEADATEND| SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS 174 | SL_PLAYEVENT_HEADMOVING | SL_PLAYEVENT_HEADSTALLED); 175 ExitOnError(result); 176 177 /* Set the player volume */ 178 result = (*volItf)->SetVolumeLevel( volItf, -300); 179 ExitOnError(result); 180 /* Pan the first player to the left */ 181 result = (*volItf)->EnableStereoPosition( volItf, SL_BOOLEAN_TRUE); ExitOnError(result); 182 result = (*volItf)->SetStereoPosition( volItf, -1000); ExitOnError(result); 183 /* Pan the second player to the right */ 184 result = (*volItf2)->EnableStereoPosition( volItf2, SL_BOOLEAN_TRUE); ExitOnError(result); 185 result = (*volItf2)->SetStereoPosition( volItf2, 1000); ExitOnError(result); 186 187 /* ------------------------------------------------------ */ 188 /* Playback */ 189 190 /* Start the data prefetching by setting the players to the paused state */ 191 result = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); 192 ExitOnError(result); 193 result = (*playItf2)->SetPlayState( playItf2, SL_PLAYSTATE_PAUSED ); 194 ExitOnError(result); 195 196 /* wait until there's data to play */ 197 SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW; 198 while (prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) { 199 usleep(100 * 1000); 200 (*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus); 201 } 202 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW; 203 while (prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) { 204 usleep(100 * 1000); 205 (*prefetchItf2)->GetPrefetchStatus(prefetchItf2, &prefetchStatus); 206 } 207 208 result = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING ); 209 ExitOnError(result); 210 211 /* Wait 2s before starting the second player */ 212 usleep(2000 * 1000); 213 fprintf(stdout, "URI example: starting to play %s\n", path2); 214 result = (*playItf2)->SetPlayState( playItf2, SL_PLAYSTATE_PLAYING ); 215 ExitOnError(result); 216 217 /* Display duration */ 218 SLmillisecond durationInMsec = SL_TIME_UNKNOWN; 219 result = (*playItf)->GetDuration(playItf, &durationInMsec); 220 ExitOnError(result); 221 if (durationInMsec == SL_TIME_UNKNOWN) { 222 fprintf(stdout, "Content duration of first URI is unknown\n"); 223 } else { 224 fprintf(stdout, "Content duration of first URI is %u ms\n", durationInMsec); 225 } 226 227 /* Wait as long as the duration of the first URI + 2s before stopping */ 228 if (durationInMsec == SL_TIME_UNKNOWN) { 229 durationInMsec = 5000; /* arbitrary time when duration is unknown */ 230 } 231 usleep((durationInMsec + 2000) * 1000); 232 233 /* Make sure player is stopped */ 234 fprintf(stdout, "URI example: stopping playback\n"); 235 result = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED); 236 ExitOnError(result); 237 result = (*playItf2)->SetPlayState(playItf2, SL_PLAYSTATE_STOPPED); 238 ExitOnError(result); 239 240 /* Destroy the players */ 241 (*player)->Destroy(player); 242 (*player2)->Destroy(player2); 243 244 /* Destroy Output Mix object */ 245 (*outputMix)->Destroy(outputMix); 246 } 247 248 //----------------------------------------------------------------- 249 int main(int argc, char* const argv[]) 250 { 251 SLresult result; 252 SLObjectItf sl; 253 254 fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf, SLVolumeItf (incl. stereo position) ", 255 argv[0]); 256 fprintf(stdout, "and AudioPlayer with SLDataLocator_URI source / OutputMix sink\n"); 257 fprintf(stdout, "Plays two sounds (or twice the same) and pans them left and right."); 258 fprintf(stdout, "Stops after the end of the first + 2s\n"); 259 260 if (argc == 1) { 261 fprintf(stdout, "Usage: \n\t%s url1 url2 \n\t%s url\n", argv[0], argv[0]); 262 fprintf(stdout, "Example: \"%s /sdcard/my.mp3 http://blabla/my.wav\" ", argv[0]); 263 fprintf(stdout, "or \"%s file:///sdcard/my.mp3\"\n", argv[0]); 264 exit(EXIT_FAILURE); 265 } 266 267 SLEngineOption EngineOption[] = { 268 {(SLuint32) SL_ENGINEOPTION_THREADSAFE, (SLuint32) SL_BOOLEAN_TRUE} 269 }; 270 271 result = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL); 272 ExitOnError(result); 273 274 /* Realizing the SL Engine in synchronous mode. */ 275 result = (*sl)->Realize(sl, SL_BOOLEAN_FALSE); 276 ExitOnError(result); 277 278 if (argc == 2) { 279 TestPlayUri(sl, argv[1], argv[1]); 280 } else if (argc == 3) { 281 TestPlayUri(sl, argv[1], argv[2]); 282 } 283 284 /* Shutdown OpenSL ES */ 285 (*sl)->Destroy(sl); 286 287 return EXIT_SUCCESS; 288 } 289
