/* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include #include #include #include #include #include #include #define MAX_NUMBER_INTERFACES 3 #define TEST_MUTE 0 #define TEST_SOLO 1 #define PREFETCHEVENT_ERROR_CANDIDATE \ (SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE) //----------------------------------------------------------------- /* Exits the application if an error is encountered */ #define ExitOnError(x) ExitOnErrorFunc(x,__LINE__) void ExitOnErrorFunc( SLresult result , int line) { if (SL_RESULT_SUCCESS != result) { fprintf(stdout, "%u error code encountered at line %d, exiting\n", result, line); exit(EXIT_FAILURE); } } //----------------------------------------------------------------- bool prefetchError = false; /* Callback for "prefetch" events, here used to detect audio resource opening errors */ void PrefetchEventCallback( SLPrefetchStatusItf caller, void *pContext __unused, SLuint32 event) { SLpermille level = 0; SLresult result; result = (*caller)->GetFillLevel(caller, &level); ExitOnError(result); SLuint32 status; result = (*caller)->GetPrefetchStatus(caller, &status); ExitOnError(result); if ((PREFETCHEVENT_ERROR_CANDIDATE == (event & PREFETCHEVENT_ERROR_CANDIDATE)) && (level == 0) && (status == SL_PREFETCHSTATUS_UNDERFLOW)) { fprintf(stdout, "PrefetchEventCallback: Error while prefetching data, exiting\n"); prefetchError = true; } } //----------------------------------------------------------------- /* Play an audio path by opening a file descriptor on that path */ void TestPlayPathFromFD( SLObjectItf sl, const char* path, SLAint64 offset, SLAint64 size) { SLresult result; SLEngineItf EngineItf; /* Objects this application uses: one player and an ouput mix */ SLObjectItf player, outputMix; /* Source of audio data to play */ SLDataSource audioSource; SLDataLocator_AndroidFD locatorFd; SLDataFormat_MIME mime; /* Data sinks for the audio player */ SLDataSink audioSink; SLDataLocator_OutputMix locator_outputmix; /* Play and PrefetchStatus interfaces for the audio player */ SLPlayItf playItf; SLPrefetchStatusItf prefetchItf; SLboolean required[MAX_NUMBER_INTERFACES]; SLInterfaceID iidArray[MAX_NUMBER_INTERFACES]; /* Get the SL Engine Interface which is implicit */ result = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf); ExitOnError(result); /* Initialize arrays required[] and iidArray[] */ for (int i=0 ; i < MAX_NUMBER_INTERFACES ; i++) { required[i] = SL_BOOLEAN_FALSE; iidArray[i] = SL_IID_NULL; } /* ------------------------------------------------------ */ /* Configuration of the output mix */ /* Create Output Mix object to be used by the player */ result = (*EngineItf)->CreateOutputMix(EngineItf, &outputMix, 0, iidArray, required); ExitOnError(result); /* Realize the Output Mix object in synchronous mode */ result = (*outputMix)->Realize(outputMix, SL_BOOLEAN_FALSE); ExitOnError(result); /* Setup the data sink structure */ locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX; locator_outputmix.outputMix = outputMix; audioSink.pLocator = (void*)&locator_outputmix; audioSink.pFormat = NULL; /* ------------------------------------------------------ */ /* Configuration of the player */ /* Set arrays required[] and iidArray[] for SLPrefetchStatusItf interfaces */ /* (SLPlayItf is implicit) */ required[0] = SL_BOOLEAN_TRUE; iidArray[0] = SL_IID_PREFETCHSTATUS; /* Setup the data source structure for the URI */ locatorFd.locatorType = SL_DATALOCATOR_ANDROIDFD; int fd = open(path, O_RDONLY); if (fd == -1) { perror(path); exit(EXIT_FAILURE); } locatorFd.fd = (SLint32) fd; locatorFd.length = size; locatorFd.offset = offset; mime.formatType = SL_DATAFORMAT_MIME; /* this is how ignored mime information is specified, according to OpenSL ES spec * in 9.1.6 SLDataFormat_MIME and 8.23 SLMetadataTraversalItf GetChildInfo */ mime.mimeType = (SLchar*)NULL; mime.containerType = SL_CONTAINERTYPE_UNSPECIFIED; audioSource.pFormat = (void*)&mime; audioSource.pLocator = (void*)&locatorFd; /* Create the audio player */ result = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &audioSource, &audioSink, 1, iidArray, required); ExitOnError(result); /* Realize the player in synchronous mode. */ result = (*player)->Realize(player, SL_BOOLEAN_FALSE); ExitOnError(result); fprintf(stdout, "URI example: after Realize\n"); /* Get the SLPlayItf, SLPrefetchStatusItf and SLAndroidStreamTypeItf interfaces for the player*/ result = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf); ExitOnError(result); result = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf); ExitOnError(result); /* Set up prefetching callback.*/ result = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, &prefetchItf); ExitOnError(result); result = (*prefetchItf)->SetCallbackEventsMask(prefetchItf, PREFETCHEVENT_ERROR_CANDIDATE); ExitOnError(result); fprintf(stdout, "Player configured\n"); /* ------------------------------------------------------ */ /* Playback and test */ /* Start the data prefetching by setting the player to the paused state */ result = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); ExitOnError(result); /* Wait until there's data to play */ SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW; while (prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) { usleep(100 * 1000); result = (*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus); ExitOnError(result); if (prefetchError) { fprintf(stderr, "Failure to prefetch data, exiting\n"); ExitOnError(SL_RESULT_CONTENT_NOT_FOUND); } } /* Get duration */ SLmillisecond durationInMsec = SL_TIME_UNKNOWN; result = (*playItf)->GetDuration(playItf, &durationInMsec); ExitOnError(result); if (durationInMsec == SL_TIME_UNKNOWN) { durationInMsec = 5000; } /* Start playback */ result = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING ); ExitOnError(result); usleep(durationInMsec * 1000); /* Make sure player is stopped */ fprintf(stdout, "Stopping playback\n"); result = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_STOPPED); ExitOnError(result); /* Destroy the player */ (*player)->Destroy(player); /* Destroy Output Mix object */ (*outputMix)->Destroy(outputMix); close(fd); } //----------------------------------------------------------------- int main(int argc, char* const argv[]) { SLresult result; SLObjectItf sl; fprintf(stdout, "OpenSL ES test %s: exercises SLPlayItf ", argv[0]); fprintf(stdout, "and AudioPlayer with SLDataLocator_AndroidFD source / OutputMix sink\n"); fprintf(stdout, "Plays the sound file designated by the given path, "); fprintf(stdout, "starting at the specified offset, and using the specified length.\n"); fprintf(stdout, "Omit the length of the file for it to be computed by the system.\n"); if (argc < 3) { fprintf(stdout, "Usage: \t%s path offsetInBytes [sizeInBytes]\n", argv[0]); fprintf(stdout, "Example: \"%s /sdcard/my.mp3 0 344460\" \n", argv[0]); exit(EXIT_FAILURE); } SLEngineOption EngineOption[] = { {(SLuint32) SL_ENGINEOPTION_THREADSAFE, (SLuint32) SL_BOOLEAN_TRUE} }; result = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL); ExitOnError(result); /* Realizing the SL Engine in synchronous mode. */ result = (*sl)->Realize(sl, SL_BOOLEAN_FALSE); ExitOnError(result); if (argc == 3) { fprintf(stdout, "no file size given, using SL_DATALOCATOR_ANDROIDFD_USE_FILE_SIZE\n"); TestPlayPathFromFD(sl, argv[1], (SLAint64)atoi(argv[2]), SL_DATALOCATOR_ANDROIDFD_USE_FILE_SIZE); } else { TestPlayPathFromFD(sl, argv[1], (SLAint64)atoi(argv[2]), (SLAint64)atoi(argv[3])); } /* Shutdown OpenSL ES */ (*sl)->Destroy(sl); return EXIT_SUCCESS; }