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