| /* |
| * Copyright (C) 2011 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. |
| */ |
| |
| /* AAC ADTS Decode Test |
| |
| First run the program from shell: |
| # slesTestDecodeAac /sdcard/myFile.adts |
| |
| Expected output: |
| OpenSL ES test slesTestDecodeAac: decodes a file containing AAC ADTS data |
| Player created |
| Player realized |
| Enqueueing initial empty buffers to receive decoded PCM data 0 1 |
| Enqueueing initial full buffers of encoded ADTS data 0 1 |
| Starting to decode |
| Frame counters: encoded=4579 decoded=4579 |
| |
| These use adb on host to retrieve the decoded file: |
| % adb pull /sdcard/myFile.adts.raw myFile.raw |
| |
| How to examine the output with Audacity: |
| Project / Import raw data |
| Select myFile.raw file, then click Open button |
| Choose these options: |
| Signed 16-bit PCM |
| Little-endian |
| 1 Channel (Mono) / 2 Channels (Stereo) based on the PCM information obtained when decoding |
| Sample rate based on the PCM information obtained when decoding |
| Click Import button |
| |
| */ |
| |
| #define QUERY_METADATA |
| |
| #include <assert.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <sys/time.h> |
| #include <fcntl.h> |
| #include <pthread.h> |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| #include <cpustats/CentralTendencyStatistics.h> |
| |
| #include <SLES/OpenSLES.h> |
| #include <SLES/OpenSLES_Android.h> |
| |
| /* Explicitly requesting SL_IID_ANDROIDBUFFERQUEUE and SL_IID_ANDROIDSIMPLEBUFFERQUEUE |
| * on the AudioPlayer object for decoding, and |
| * SL_IID_METADATAEXTRACTION for retrieving the format of the decoded audio. |
| */ |
| #define NUM_EXPLICIT_INTERFACES_FOR_PLAYER 4 |
| |
| /* Number of decoded samples produced by one AAC frame; defined by the standard */ |
| #define SAMPLES_PER_AAC_FRAME 1024 |
| /* Size of the encoded AAC ADTS buffer queue */ |
| #define NB_BUFFERS_IN_ADTS_QUEUE 2 // 2 to 4 is typical |
| |
| /* Size of the decoded PCM buffer queue */ |
| #define NB_BUFFERS_IN_PCM_QUEUE 2 // 2 to 4 is typical |
| /* Size of each PCM buffer in the queue */ |
| #define BUFFER_SIZE_IN_BYTES (2*sizeof(short)*SAMPLES_PER_AAC_FRAME) |
| |
| /* Local storage for decoded PCM audio data */ |
| int8_t pcmData[NB_BUFFERS_IN_PCM_QUEUE * BUFFER_SIZE_IN_BYTES]; |
| |
| /* destination for decoded data */ |
| static FILE* outputFp; |
| |
| #ifdef QUERY_METADATA |
| /* metadata key index for the PCM format information we want to retrieve */ |
| static int channelCountKeyIndex = -1; |
| static int sampleRateKeyIndex = -1; |
| static int bitsPerSampleKeyIndex = -1; |
| static int containerSizeKeyIndex = -1; |
| static int channelMaskKeyIndex = -1; |
| static int endiannessKeyIndex = -1; |
| /* size of the struct to retrieve the PCM format metadata values: the values we're interested in |
| * are SLuint32, but it is saved in the data field of a SLMetadataInfo, hence the larger size. |
| * Note that this size is queried and displayed at l.XXX for demonstration/test purposes. |
| * */ |
| #define PCM_METADATA_VALUE_SIZE 32 |
| /* we only want to query / display the PCM format once */ |
| static bool formatQueried = false; |
| #endif |
| |
| /* to signal to the test app that the end of the encoded ADTS stream has been reached */ |
| bool eos = false; |
| bool endOfEncodedStream = false; |
| |
| void *ptr; |
| unsigned char *frame; |
| size_t filelen; |
| size_t encodedFrames = 0; |
| size_t encodedSamples = 0; |
| size_t decodedFrames = 0; |
| size_t decodedSamples = 0; |
| size_t totalEncodeCompletions = 0; // number of Enqueue completions received |
| CentralTendencyStatistics frameStats; |
| size_t pauseFrame = 0; // pause after this many decoded frames, zero means don't pause |
| SLboolean createRaw = SL_BOOLEAN_TRUE; // whether to create a .raw file containing PCM data |
| |
| /* constant to identify a buffer context which is the end of the stream to decode */ |
| static const int kEosBufferCntxt = 1980; // a magic value we can compare against |
| |
| /* protects shared variables */ |
| pthread_mutex_t eosLock = PTHREAD_MUTEX_INITIALIZER; |
| pthread_cond_t eosCondition = PTHREAD_COND_INITIALIZER; |
| |
| // These are extensions to OpenMAX AL 1.0.1 values |
| |
| #define PREFETCHSTATUS_UNKNOWN ((SLuint32) 0) |
| #define PREFETCHSTATUS_ERROR ((SLuint32) (-1)) |
| |
| // Mutex and condition shared with main program to protect prefetch_status |
| |
| static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; |
| static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
| SLuint32 prefetch_status = PREFETCHSTATUS_UNKNOWN; |
| |
| /* used to detect errors likely to have occured when the OpenSL ES framework fails to open |
| * a resource, for instance because a file URI is invalid, or an HTTP server doesn't respond. |
| */ |
| #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(stderr, "Error code %u encountered at line %d, exiting\n", result, line); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| //----------------------------------------------------------------- |
| /* Callback for "prefetch" events, here used to detect audio resource opening errors */ |
| void PrefetchEventCallback(SLPrefetchStatusItf caller, void *pContext, SLuint32 event) |
| { |
| // pContext is unused here, so we pass NULL |
| assert(pContext == NULL); |
| SLpermille level = 0; |
| SLresult result; |
| result = (*caller)->GetFillLevel(caller, &level); |
| ExitOnError(result); |
| SLuint32 status; |
| result = (*caller)->GetPrefetchStatus(caller, &status); |
| ExitOnError(result); |
| printf("prefetch level=%d status=0x%x event=%d\n", level, status, event); |
| SLuint32 new_prefetch_status; |
| if ((PREFETCHEVENT_ERROR_CANDIDATE == (event & PREFETCHEVENT_ERROR_CANDIDATE)) |
| && (level == 0) && (status == SL_PREFETCHSTATUS_UNDERFLOW)) { |
| printf("PrefetchEventCallback: Error while prefetching data, exiting\n"); |
| new_prefetch_status = PREFETCHSTATUS_ERROR; |
| } else if (event == SL_PREFETCHEVENT_STATUSCHANGE) { |
| new_prefetch_status = status; |
| } else { |
| return; |
| } |
| int ok; |
| ok = pthread_mutex_lock(&mutex); |
| assert(ok == 0); |
| prefetch_status = new_prefetch_status; |
| ok = pthread_cond_signal(&cond); |
| assert(ok == 0); |
| ok = pthread_mutex_unlock(&mutex); |
| assert(ok == 0); |
| } |
| |
| //----------------------------------------------------------------- |
| /* Structure for passing information to callback function */ |
| typedef struct CallbackCntxt_ { |
| #ifdef QUERY_METADATA |
| SLMetadataExtractionItf metaItf; |
| #endif |
| SLPlayItf playItf; |
| SLint8* pDataBase; // Base address of local audio data storage |
| SLint8* pData; // Current address of local audio data storage |
| } CallbackCntxt; |
| |
| // used to notify when SL_PLAYEVENT_HEADATEND event is received |
| static pthread_mutex_t head_mutex = PTHREAD_MUTEX_INITIALIZER; |
| static pthread_cond_t head_cond = PTHREAD_COND_INITIALIZER; |
| static SLboolean head_atend = SL_BOOLEAN_FALSE; |
| |
| //----------------------------------------------------------------- |
| /* Callback for SLPlayItf through which we receive the SL_PLAYEVENT_HEADATEND event */ |
| void PlayCallback(SLPlayItf caller, void *pContext __unused, SLuint32 event) { |
| SLmillisecond position; |
| SLresult res = (*caller)->GetPosition(caller, &position); |
| ExitOnError(res); |
| if (event & SL_PLAYEVENT_HEADATMARKER) { |
| printf("SL_PLAYEVENT_HEADATMARKER position=%u ms\n", position); |
| } |
| if (event & SL_PLAYEVENT_HEADATNEWPOS) { |
| printf("SL_PLAYEVENT_HEADATNEWPOS position=%u ms\n", position); |
| } |
| if (event & SL_PLAYEVENT_HEADATEND) { |
| printf("SL_PLAYEVENT_HEADATEND position=%u ms, all decoded data has been received\n", |
| position); |
| pthread_mutex_lock(&head_mutex); |
| head_atend = SL_BOOLEAN_TRUE; |
| pthread_cond_signal(&head_cond); |
| pthread_mutex_unlock(&head_mutex); |
| } |
| } |
| |
| //----------------------------------------------------------------- |
| /* Callback for AndroidBufferQueueItf through which we supply ADTS buffers */ |
| SLresult AndroidBufferQueueCallback( |
| SLAndroidBufferQueueItf caller, |
| void *pCallbackContext __unused, /* input */ |
| void *pBufferContext, /* input */ |
| void *pBufferData __unused, /* input */ |
| SLuint32 dataSize __unused, /* input */ |
| SLuint32 dataUsed __unused, /* input */ |
| const SLAndroidBufferItem *pItems __unused, /* input */ |
| SLuint32 itemsLength __unused /* input */) |
| { |
| // mutex on all global variables |
| pthread_mutex_lock(&eosLock); |
| SLresult res; |
| |
| // for demonstration purposes: |
| // verify what type of information was enclosed in the processed buffer |
| if (NULL != pBufferContext) { |
| if (&kEosBufferCntxt == pBufferContext) { |
| fprintf(stdout, "EOS was processed\n"); |
| } |
| } |
| |
| ++totalEncodeCompletions; |
| if (endOfEncodedStream) { |
| // we continue to receive acknowledgement after each buffer was processed |
| if (pBufferContext == (void *) &kEosBufferCntxt) { |
| printf("Received EOS completion after EOS\n"); |
| } else if (pBufferContext == NULL) { |
| printf("Received ADTS completion after EOS\n"); |
| } else { |
| fprintf(stderr, "Received acknowledgement after EOS with unexpected context %p\n", |
| pBufferContext); |
| } |
| } else if (filelen == 0) { |
| // signal EOS to the decoder rather than just starving it |
| printf("Enqueue EOS: encoded frames=%zu, decoded frames=%zu\n", encodedFrames, |
| decodedFrames); |
| printf("You should now see %u ADTS completion%s followed by 1 EOS completion\n", |
| NB_BUFFERS_IN_ADTS_QUEUE - 1, NB_BUFFERS_IN_ADTS_QUEUE != 2 ? "s" : ""); |
| SLAndroidBufferItem msgEos; |
| msgEos.itemKey = SL_ANDROID_ITEMKEY_EOS; |
| msgEos.itemSize = 0; |
| // EOS message has no parameters, so the total size of the message is the size of the key |
| // plus the size of itemSize, both SLuint32 |
| res = (*caller)->Enqueue(caller, (void *)&kEosBufferCntxt /*pBufferContext*/, |
| NULL /*pData*/, 0 /*dataLength*/, |
| &msgEos /*pMsg*/, |
| sizeof(SLuint32)*2 /*msgLength*/); |
| ExitOnError(res); |
| endOfEncodedStream = true; |
| // verify that we are at start of an ADTS frame |
| } else if (!(filelen < 7 || frame[0] != 0xFF || (frame[1] & 0xF0) != 0xF0)) { |
| if (pBufferContext != NULL) { |
| fprintf(stderr, "Received acknowledgement before EOS with unexpected context %p\n", |
| pBufferContext); |
| } |
| unsigned framelen = ((frame[3] & 3) << 11) | (frame[4] << 3) | (frame[5] >> 5); |
| if (framelen <= filelen) { |
| // push more data to the queue |
| res = (*caller)->Enqueue(caller, NULL /*pBufferContext*/, |
| frame, framelen, NULL, 0); |
| ExitOnError(res); |
| frame += framelen; |
| filelen -= framelen; |
| ++encodedFrames; |
| encodedSamples += SAMPLES_PER_AAC_FRAME; |
| frameStats.sample(framelen); |
| } else { |
| fprintf(stderr, |
| "partial ADTS frame at EOF discarded; offset=%zu, framelen=%u, filelen=%zu\n", |
| frame - (unsigned char *) ptr, framelen, filelen); |
| frame += filelen; |
| filelen = 0; |
| } |
| } else { |
| fprintf(stderr, "corrupt ADTS frame encountered; offset=%zu, filelen=%zu\n", |
| frame - (unsigned char *) ptr, filelen); |
| frame += filelen; |
| filelen = 0; |
| } |
| pthread_mutex_unlock(&eosLock); |
| |
| return SL_RESULT_SUCCESS; |
| } |
| |
| //----------------------------------------------------------------- |
| /* Callback for decoding buffer queue events */ |
| void DecPlayCallback( |
| SLAndroidSimpleBufferQueueItf queueItf, |
| void *pContext) |
| { |
| // mutex on all global variables |
| pthread_mutex_lock(&eosLock); |
| |
| CallbackCntxt *pCntxt = (CallbackCntxt*)pContext; |
| |
| /* Save the decoded data to output file */ |
| if (outputFp != NULL && fwrite(pCntxt->pData, 1, BUFFER_SIZE_IN_BYTES, outputFp) |
| < BUFFER_SIZE_IN_BYTES) { |
| fprintf(stderr, "Error writing to output file"); |
| } |
| |
| /* Re-enqueue the now empty buffer */ |
| SLresult res; |
| res = (*queueItf)->Enqueue(queueItf, pCntxt->pData, BUFFER_SIZE_IN_BYTES); |
| ExitOnError(res); |
| |
| /* Increase data pointer by buffer size, with circular wraparound */ |
| pCntxt->pData += BUFFER_SIZE_IN_BYTES; |
| if (pCntxt->pData >= pCntxt->pDataBase + (NB_BUFFERS_IN_PCM_QUEUE * BUFFER_SIZE_IN_BYTES)) { |
| pCntxt->pData = pCntxt->pDataBase; |
| } |
| |
| // Note: adding a sleep here or any sync point is a way to slow down the decoding, or |
| // synchronize it with some other event, as the OpenSL ES framework will block until the |
| // buffer queue callback return to proceed with the decoding. |
| |
| #ifdef QUERY_METADATA |
| /* Example: query of the decoded PCM format */ |
| if (!formatQueried) { |
| /* memory to receive the PCM format metadata */ |
| union { |
| SLMetadataInfo pcmMetaData; |
| char withData[PCM_METADATA_VALUE_SIZE]; |
| } u; |
| res = (*pCntxt->metaItf)->GetValue(pCntxt->metaItf, sampleRateKeyIndex, |
| PCM_METADATA_VALUE_SIZE, &u.pcmMetaData); ExitOnError(res); |
| // Note: here we could verify the following: |
| // u.pcmMetaData->encoding == SL_CHARACTERENCODING_BINARY |
| // u.pcmMetaData->size == sizeof(SLuint32) |
| // but the call was successful for the PCM format keys, so those conditions are implied |
| printf("sample rate = %d\n", *((SLuint32*)u.pcmMetaData.data)); |
| res = (*pCntxt->metaItf)->GetValue(pCntxt->metaItf, channelCountKeyIndex, |
| PCM_METADATA_VALUE_SIZE, &u.pcmMetaData); ExitOnError(res); |
| printf("channel count = %d\n", *((SLuint32*)u.pcmMetaData.data)); |
| res = (*pCntxt->metaItf)->GetValue(pCntxt->metaItf, bitsPerSampleKeyIndex, |
| PCM_METADATA_VALUE_SIZE, &u.pcmMetaData); ExitOnError(res); |
| printf("bits per sample = %d bits\n", *((SLuint32*)u.pcmMetaData.data)); |
| res = (*pCntxt->metaItf)->GetValue(pCntxt->metaItf, containerSizeKeyIndex, |
| PCM_METADATA_VALUE_SIZE, &u.pcmMetaData); ExitOnError(res); |
| printf("container size = %d bits\n", *((SLuint32*)u.pcmMetaData.data)); |
| res = (*pCntxt->metaItf)->GetValue(pCntxt->metaItf, channelMaskKeyIndex, |
| PCM_METADATA_VALUE_SIZE, &u.pcmMetaData); ExitOnError(res); |
| printf("channel mask = 0x%X (0x3=front left | front right, 0x4=front center)\n", |
| *((SLuint32*)u.pcmMetaData.data)); |
| res = (*pCntxt->metaItf)->GetValue(pCntxt->metaItf, endiannessKeyIndex, |
| PCM_METADATA_VALUE_SIZE, &u.pcmMetaData); ExitOnError(res); |
| printf("endianness = %d (1=big, 2=little)\n", *((SLuint32*)u.pcmMetaData.data)); |
| formatQueried = true; |
| } |
| #endif |
| |
| ++decodedFrames; |
| decodedSamples += SAMPLES_PER_AAC_FRAME; |
| |
| /* Periodically ask for position and duration */ |
| if ((decodedFrames % 1000 == 0) || endOfEncodedStream) { |
| SLmillisecond position; |
| res = (*pCntxt->playItf)->GetPosition(pCntxt->playItf, &position); |
| ExitOnError(res); |
| SLmillisecond duration; |
| res = (*pCntxt->playItf)->GetDuration(pCntxt->playItf, &duration); |
| ExitOnError(res); |
| if (duration == SL_TIME_UNKNOWN) { |
| printf("After %zu encoded %zu decoded frames: position is %u ms, duration is " |
| "unknown as expected\n", |
| encodedFrames, decodedFrames, position); |
| } else { |
| printf("After %zu encoded %zu decoded frames: position is %u ms, duration is " |
| "surprisingly %u ms\n", |
| encodedFrames, decodedFrames, position, duration); |
| } |
| } |
| |
| if (endOfEncodedStream && decodedSamples >= encodedSamples) { |
| eos = true; |
| pthread_cond_signal(&eosCondition); |
| } |
| pthread_mutex_unlock(&eosLock); |
| } |
| |
| //----------------------------------------------------------------- |
| |
| /* Decode an audio path by opening a file descriptor on that path */ |
| void TestDecToBuffQueue( SLObjectItf sl, const char *path, int fd) |
| { |
| // check what kind of object it is |
| int ok; |
| struct stat statbuf; |
| ok = fstat(fd, &statbuf); |
| if (ok < 0) { |
| perror(path); |
| return; |
| } |
| |
| // verify that's it is a file |
| if (!S_ISREG(statbuf.st_mode)) { |
| fprintf(stderr, "%s: not an ordinary file\n", path); |
| return; |
| } |
| |
| // map file contents into memory to make it easier to access the ADTS frames directly |
| ptr = mmap(NULL, statbuf.st_size, PROT_READ, MAP_FILE | MAP_PRIVATE, fd, (off_t) 0); |
| if (ptr == MAP_FAILED) { |
| perror(path); |
| return; |
| } |
| frame = (unsigned char *) ptr; |
| filelen = statbuf.st_size; |
| |
| // create PCM .raw file |
| if (createRaw) { |
| size_t len = strlen((const char *) path); |
| char* outputPath = (char*) malloc(len + 4 + 1); // save room to concatenate ".raw" |
| if (NULL == outputPath) { |
| ExitOnError(SL_RESULT_RESOURCE_ERROR); |
| } |
| memcpy(outputPath, path, len + 1); |
| strcat(outputPath, ".raw"); |
| outputFp = fopen(outputPath, "w"); |
| if (NULL == outputFp) { |
| // issue an error message, but continue the decoding anyway |
| perror(outputPath); |
| } |
| free(outputPath); |
| } else { |
| outputFp = NULL; |
| } |
| |
| SLresult res; |
| SLEngineItf EngineItf; |
| |
| /* Objects this application uses: one audio player */ |
| SLObjectItf player; |
| |
| /* Interfaces for the audio player */ |
| SLPlayItf playItf; |
| #ifdef QUERY_METADATA |
| /* to retrieve the decoded PCM format */ |
| SLMetadataExtractionItf mdExtrItf; |
| #endif |
| /* to retrieve the PCM samples */ |
| SLAndroidSimpleBufferQueueItf decBuffQueueItf; |
| /* to queue the AAC data to decode */ |
| SLAndroidBufferQueueItf aacBuffQueueItf; |
| /* for prefetch status */ |
| SLPrefetchStatusItf prefetchItf; |
| |
| SLboolean required[NUM_EXPLICIT_INTERFACES_FOR_PLAYER]; |
| SLInterfaceID iidArray[NUM_EXPLICIT_INTERFACES_FOR_PLAYER]; |
| |
| /* Get the SL Engine Interface which is implicit */ |
| res = (*sl)->GetInterface(sl, SL_IID_ENGINE, (void*)&EngineItf); |
| ExitOnError(res); |
| |
| /* Initialize arrays required[] and iidArray[] */ |
| unsigned int i; |
| for (i=0 ; i < NUM_EXPLICIT_INTERFACES_FOR_PLAYER ; i++) { |
| required[i] = SL_BOOLEAN_FALSE; |
| iidArray[i] = SL_IID_NULL; |
| } |
| |
| /* ------------------------------------------------------ */ |
| /* Configuration of the player */ |
| |
| /* Request the AndroidSimpleBufferQueue interface */ |
| required[0] = SL_BOOLEAN_TRUE; |
| iidArray[0] = SL_IID_ANDROIDSIMPLEBUFFERQUEUE; |
| /* Request the AndroidBufferQueue interface */ |
| required[1] = SL_BOOLEAN_TRUE; |
| iidArray[1] = SL_IID_ANDROIDBUFFERQUEUESOURCE; |
| /* Request the PrefetchStatus interface */ |
| required[2] = SL_BOOLEAN_TRUE; |
| iidArray[2] = SL_IID_PREFETCHSTATUS; |
| #ifdef QUERY_METADATA |
| /* Request the MetadataExtraction interface */ |
| required[3] = SL_BOOLEAN_TRUE; |
| iidArray[3] = SL_IID_METADATAEXTRACTION; |
| #endif |
| |
| /* Setup the data source for queueing AAC buffers of ADTS data */ |
| SLDataLocator_AndroidBufferQueue loc_srcAbq = { |
| SL_DATALOCATOR_ANDROIDBUFFERQUEUE /*locatorType*/, |
| NB_BUFFERS_IN_ADTS_QUEUE /*numBuffers*/}; |
| SLDataFormat_MIME format_srcMime = { |
| SL_DATAFORMAT_MIME /*formatType*/, |
| SL_ANDROID_MIME_AACADTS /*mimeType*/, |
| SL_CONTAINERTYPE_RAW /*containerType*/}; |
| SLDataSource decSource = {&loc_srcAbq /*pLocator*/, &format_srcMime /*pFormat*/}; |
| |
| /* Setup the data sink, a buffer queue for buffers of PCM data */ |
| SLDataLocator_AndroidSimpleBufferQueue loc_destBq = { |
| SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE/*locatorType*/, |
| NB_BUFFERS_IN_PCM_QUEUE /*numBuffers*/ }; |
| |
| /* declare we're decoding to PCM, the parameters after that need to be valid, |
| but are ignored, the decoded format will match the source */ |
| SLDataFormat_PCM format_destPcm = { /*formatType*/ SL_DATAFORMAT_PCM, /*numChannels*/ 1, |
| /*samplesPerSec*/ SL_SAMPLINGRATE_8, /*pcm.bitsPerSample*/ SL_PCMSAMPLEFORMAT_FIXED_16, |
| /*/containerSize*/ 16, /*channelMask*/ SL_SPEAKER_FRONT_LEFT, |
| /*endianness*/ SL_BYTEORDER_LITTLEENDIAN }; |
| SLDataSink decDest = {&loc_destBq /*pLocator*/, &format_destPcm /*pFormat*/}; |
| |
| /* Create the audio player */ |
| res = (*EngineItf)->CreateAudioPlayer(EngineItf, &player, &decSource, &decDest, |
| #ifdef QUERY_METADATA |
| NUM_EXPLICIT_INTERFACES_FOR_PLAYER, |
| #else |
| NUM_EXPLICIT_INTERFACES_FOR_PLAYER - 1, |
| #endif |
| iidArray, required); |
| ExitOnError(res); |
| printf("Player created\n"); |
| |
| /* Realize the player in synchronous mode. */ |
| res = (*player)->Realize(player, SL_BOOLEAN_FALSE); |
| ExitOnError(res); |
| printf("Player realized\n"); |
| |
| /* Get the play interface which is implicit */ |
| res = (*player)->GetInterface(player, SL_IID_PLAY, (void*)&playItf); |
| ExitOnError(res); |
| |
| /* Enable callback when position passes through a marker (SL_PLAYEVENT_HEADATMARKER) */ |
| res = (*playItf)->SetMarkerPosition(playItf, 5000); |
| ExitOnError(res); |
| |
| /* Enable callback for periodic position updates (SL_PLAYEVENT_HEADATNEWPOS) */ |
| res = (*playItf)->SetPositionUpdatePeriod(playItf, 3000); |
| ExitOnError(res); |
| |
| /* Use the play interface to set up a callback for the SL_PLAYEVENT_HEAD* events */ |
| res = (*playItf)->SetCallbackEventsMask(playItf, |
| SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS | SL_PLAYEVENT_HEADATEND); |
| ExitOnError(res); |
| res = (*playItf)->RegisterCallback(playItf, PlayCallback /*callback*/, NULL /*pContext*/); |
| ExitOnError(res); |
| |
| /* Get the position before prefetch; should be zero */ |
| SLmillisecond position; |
| res = (*playItf)->GetPosition(playItf, &position); |
| ExitOnError(res); |
| if (position == 0) { |
| printf("The position before prefetch is zero as expected\n"); |
| } else if (position == SL_TIME_UNKNOWN) { |
| printf("That's surprising the position before prefetch is unknown"); |
| } else { |
| printf("That's surprising the position before prefetch is %u ms\n", position); |
| } |
| |
| /* Get the duration before prefetch; should be unknown */ |
| SLmillisecond duration; |
| res = (*playItf)->GetDuration(playItf, &duration); |
| ExitOnError(res); |
| if (duration == SL_TIME_UNKNOWN) { |
| printf("The duration before prefetch is unknown as expected\n"); |
| } else { |
| printf("That's surprising the duration before prefetch is %u ms\n", duration); |
| } |
| |
| /* Get the buffer queue interface which was explicitly requested */ |
| res = (*player)->GetInterface(player, SL_IID_ANDROIDSIMPLEBUFFERQUEUE, (void*)&decBuffQueueItf); |
| ExitOnError(res); |
| |
| /* Get the Android buffer queue interface which was explicitly requested */ |
| res = (*player)->GetInterface(player, SL_IID_ANDROIDBUFFERQUEUESOURCE, (void*)&aacBuffQueueItf); |
| ExitOnError(res); |
| |
| /* Get the prefetch status interface which was explicitly requested */ |
| res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf); |
| ExitOnError(res); |
| |
| #ifdef QUERY_METADATA |
| /* Get the metadata extraction interface which was explicitly requested */ |
| res = (*player)->GetInterface(player, SL_IID_METADATAEXTRACTION, (void*)&mdExtrItf); |
| ExitOnError(res); |
| #endif |
| |
| /* ------------------------------------------------------ */ |
| /* Initialize the callback and its context for the buffer queue of the decoded PCM */ |
| CallbackCntxt sinkCntxt; |
| sinkCntxt.playItf = playItf; |
| #ifdef QUERY_METADATA |
| sinkCntxt.metaItf = mdExtrItf; |
| #endif |
| sinkCntxt.pDataBase = (int8_t*)&pcmData; |
| sinkCntxt.pData = sinkCntxt.pDataBase; |
| res = (*decBuffQueueItf)->RegisterCallback(decBuffQueueItf, DecPlayCallback, &sinkCntxt); |
| ExitOnError(res); |
| |
| /* Enqueue buffers to map the region of memory allocated to store the decoded data */ |
| printf("Enqueueing initial empty buffers to receive decoded PCM data"); |
| for(i = 0 ; i < NB_BUFFERS_IN_PCM_QUEUE ; i++) { |
| printf(" %d", i); |
| res = (*decBuffQueueItf)->Enqueue(decBuffQueueItf, sinkCntxt.pData, BUFFER_SIZE_IN_BYTES); |
| ExitOnError(res); |
| sinkCntxt.pData += BUFFER_SIZE_IN_BYTES; |
| if (sinkCntxt.pData >= sinkCntxt.pDataBase + |
| (NB_BUFFERS_IN_PCM_QUEUE * BUFFER_SIZE_IN_BYTES)) { |
| sinkCntxt.pData = sinkCntxt.pDataBase; |
| } |
| } |
| printf("\n"); |
| |
| /* ------------------------------------------------------ */ |
| /* Initialize the callback for prefetch errors, if we can't open the resource to decode */ |
| res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, NULL); |
| ExitOnError(res); |
| res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf, PREFETCHEVENT_ERROR_CANDIDATE); |
| ExitOnError(res); |
| |
| /* Initialize the callback for the Android buffer queue of the encoded data */ |
| res = (*aacBuffQueueItf)->RegisterCallback(aacBuffQueueItf, AndroidBufferQueueCallback, NULL); |
| ExitOnError(res); |
| |
| /* Enqueue the content of our encoded data before starting to play, |
| we don't want to starve the player initially */ |
| printf("Enqueueing initial full buffers of encoded ADTS data"); |
| for (i=0 ; i < NB_BUFFERS_IN_ADTS_QUEUE ; i++) { |
| if (filelen < 7 || frame[0] != 0xFF || (frame[1] & 0xF0) != 0xF0) { |
| printf("\ncorrupt ADTS frame encountered; offset %zu bytes\n", |
| frame - (unsigned char *) ptr); |
| // Note that prefetch will detect this error soon when it gets a premature EOF |
| break; |
| } |
| unsigned framelen = ((frame[3] & 3) << 11) | (frame[4] << 3) | (frame[5] >> 5); |
| printf(" %d (%u bytes)", i, framelen); |
| res = (*aacBuffQueueItf)->Enqueue(aacBuffQueueItf, NULL /*pBufferContext*/, |
| frame, framelen, NULL, 0); |
| ExitOnError(res); |
| frame += framelen; |
| filelen -= framelen; |
| ++encodedFrames; |
| encodedSamples += SAMPLES_PER_AAC_FRAME; |
| frameStats.sample(framelen); |
| } |
| printf("\n"); |
| |
| #ifdef QUERY_METADATA |
| /* ------------------------------------------------------ */ |
| /* Get and display the metadata key names for the decoder */ |
| // This is for test / demonstration purposes only where we discover the key and value sizes |
| // of a PCM decoder. An application that would want to directly get access to those values |
| // can make assumptions about the size of the keys and their matching values (all SLuint32), |
| // but it should not make assumptions about the key indices as these are subject to change. |
| // Note that we don't get the metadata values yet; that happens in the first decode callback. |
| SLuint32 itemCount; |
| res = (*mdExtrItf)->GetItemCount(mdExtrItf, &itemCount); |
| ExitOnError(res); |
| printf("itemCount=%u\n", itemCount); |
| SLuint32 keySize, valueSize; |
| SLMetadataInfo *keyInfo, *value; |
| for(i=0 ; i<itemCount ; i++) { |
| keyInfo = NULL; keySize = 0; |
| value = NULL; valueSize = 0; |
| res = (*mdExtrItf)->GetKeySize(mdExtrItf, i, &keySize); |
| ExitOnError(res); |
| res = (*mdExtrItf)->GetValueSize(mdExtrItf, i, &valueSize); |
| ExitOnError(res); |
| keyInfo = (SLMetadataInfo*) malloc(keySize); |
| if (NULL != keyInfo) { |
| res = (*mdExtrItf)->GetKey(mdExtrItf, i, keySize, keyInfo); |
| ExitOnError(res); |
| printf("key[%d] size=%d, name=%s \tvalue size=%d encoding=0x%X langCountry=%s\n", |
| i, keyInfo->size, keyInfo->data, valueSize, keyInfo->encoding, |
| keyInfo->langCountry); |
| /* find out the key index of the metadata we're interested in */ |
| if (!strcmp((char*)keyInfo->data, ANDROID_KEY_PCMFORMAT_NUMCHANNELS)) { |
| channelCountKeyIndex = i; |
| } else if (!strcmp((char*)keyInfo->data, ANDROID_KEY_PCMFORMAT_SAMPLERATE)) { |
| sampleRateKeyIndex = i; |
| } else if (!strcmp((char*)keyInfo->data, ANDROID_KEY_PCMFORMAT_BITSPERSAMPLE)) { |
| bitsPerSampleKeyIndex = i; |
| } else if (!strcmp((char*)keyInfo->data, ANDROID_KEY_PCMFORMAT_CONTAINERSIZE)) { |
| containerSizeKeyIndex = i; |
| } else if (!strcmp((char*)keyInfo->data, ANDROID_KEY_PCMFORMAT_CHANNELMASK)) { |
| channelMaskKeyIndex = i; |
| } else if (!strcmp((char*)keyInfo->data, ANDROID_KEY_PCMFORMAT_ENDIANNESS)) { |
| endiannessKeyIndex = i; |
| } else { |
| printf("Unknown key %s ignored\n", (char *)keyInfo->data); |
| } |
| free(keyInfo); |
| } |
| } |
| if (channelCountKeyIndex != -1) { |
| printf("Key %s is at index %d\n", |
| ANDROID_KEY_PCMFORMAT_NUMCHANNELS, channelCountKeyIndex); |
| } else { |
| fprintf(stderr, "Unable to find key %s\n", ANDROID_KEY_PCMFORMAT_NUMCHANNELS); |
| } |
| if (sampleRateKeyIndex != -1) { |
| printf("Key %s is at index %d\n", |
| ANDROID_KEY_PCMFORMAT_SAMPLERATE, sampleRateKeyIndex); |
| } else { |
| fprintf(stderr, "Unable to find key %s\n", ANDROID_KEY_PCMFORMAT_SAMPLERATE); |
| } |
| if (bitsPerSampleKeyIndex != -1) { |
| printf("Key %s is at index %d\n", |
| ANDROID_KEY_PCMFORMAT_BITSPERSAMPLE, bitsPerSampleKeyIndex); |
| } else { |
| fprintf(stderr, "Unable to find key %s\n", ANDROID_KEY_PCMFORMAT_BITSPERSAMPLE); |
| } |
| if (containerSizeKeyIndex != -1) { |
| printf("Key %s is at index %d\n", |
| ANDROID_KEY_PCMFORMAT_CONTAINERSIZE, containerSizeKeyIndex); |
| } else { |
| fprintf(stderr, "Unable to find key %s\n", ANDROID_KEY_PCMFORMAT_CONTAINERSIZE); |
| } |
| if (channelMaskKeyIndex != -1) { |
| printf("Key %s is at index %d\n", |
| ANDROID_KEY_PCMFORMAT_CHANNELMASK, channelMaskKeyIndex); |
| } else { |
| fprintf(stderr, "Unable to find key %s\n", ANDROID_KEY_PCMFORMAT_CHANNELMASK); |
| } |
| if (endiannessKeyIndex != -1) { |
| printf("Key %s is at index %d\n", |
| ANDROID_KEY_PCMFORMAT_ENDIANNESS, endiannessKeyIndex); |
| } else { |
| fprintf(stderr, "Unable to find key %s\n", ANDROID_KEY_PCMFORMAT_ENDIANNESS); |
| } |
| #endif |
| |
| // set the player's state to paused, to start prefetching |
| printf("Setting play state to PAUSED\n"); |
| res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_PAUSED); |
| ExitOnError(res); |
| |
| // wait for prefetch status callback to indicate either sufficient data or error |
| printf("Awaiting prefetch complete\n"); |
| pthread_mutex_lock(&mutex); |
| while (prefetch_status == PREFETCHSTATUS_UNKNOWN) { |
| pthread_cond_wait(&cond, &mutex); |
| } |
| pthread_mutex_unlock(&mutex); |
| if (prefetch_status == PREFETCHSTATUS_ERROR) { |
| fprintf(stderr, "Error during prefetch, exiting\n"); |
| goto destroyRes; |
| } |
| printf("Prefetch is complete\n"); |
| |
| /* ------------------------------------------------------ */ |
| /* Start decoding */ |
| printf("Starting to decode\n"); |
| res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_PLAYING); |
| ExitOnError(res); |
| |
| /* Decode until the end of the stream is reached */ |
| printf("Awaiting notification that all encoded buffers have been enqueued\n"); |
| pthread_mutex_lock(&eosLock); |
| while (!eos) { |
| if (pauseFrame > 0) { |
| if (decodedFrames >= pauseFrame) { |
| pauseFrame = 0; |
| printf("Pausing after decoded frame %zu for 10 seconds\n", decodedFrames); |
| pthread_mutex_unlock(&eosLock); |
| res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_PAUSED); |
| ExitOnError(res); |
| sleep(10); |
| printf("Resuming\n"); |
| res = (*playItf)->SetPlayState(playItf, SL_PLAYSTATE_PLAYING); |
| ExitOnError(res); |
| pthread_mutex_lock(&eosLock); |
| } else { |
| pthread_mutex_unlock(&eosLock); |
| usleep(10*1000); |
| pthread_mutex_lock(&eosLock); |
| } |
| } else { |
| pthread_cond_wait(&eosCondition, &eosLock); |
| } |
| } |
| pthread_mutex_unlock(&eosLock); |
| printf("All encoded buffers have now been enqueued, but there's still more to do\n"); |
| |
| /* This just means done enqueueing; there may still more data in decode queue! */ |
| pthread_mutex_lock(&head_mutex); |
| while (!head_atend) { |
| pthread_cond_wait(&head_cond, &head_mutex); |
| } |
| pthread_mutex_unlock(&head_mutex); |
| printf("Decode is now finished\n"); |
| |
| pthread_mutex_lock(&eosLock); |
| printf("Frame counters: encoded=%zu decoded=%zu\n", encodedFrames, decodedFrames); |
| printf("Sample counters: encoded=%zu decoded=%zu\n", encodedSamples, decodedSamples); |
| printf("Total encode completions received: actual=%zu, expected=%zu\n", |
| totalEncodeCompletions, encodedFrames+1/*EOS*/); |
| pthread_mutex_unlock(&eosLock); |
| |
| /* Get the final position and duration */ |
| res = (*playItf)->GetPosition(playItf, &position); |
| ExitOnError(res); |
| res = (*playItf)->GetDuration(playItf, &duration); |
| ExitOnError(res); |
| if (duration == SL_TIME_UNKNOWN) { |
| printf("The final position is %u ms, duration is unknown\n", position); |
| } else { |
| printf("The final position is %u ms, duration is %u ms\n", position, duration); |
| } |
| |
| printf("Frame length statistics:\n"); |
| printf(" n = %u frames\n", frameStats.n()); |
| printf(" mean = %.1f bytes\n", frameStats.mean()); |
| printf(" minimum = %.1f bytes\n", frameStats.minimum()); |
| printf(" maximum = %.1f bytes\n", frameStats.maximum()); |
| printf(" stddev = %.1f bytes\n", frameStats.stddev()); |
| |
| /* ------------------------------------------------------ */ |
| /* End of decoding */ |
| |
| destroyRes: |
| /* Destroy the AudioPlayer object */ |
| (*player)->Destroy(player); |
| |
| if (outputFp != NULL) { |
| fclose(outputFp); |
| } |
| |
| // unmap the ADTS AAC file from memory |
| ok = munmap(ptr, statbuf.st_size); |
| if (0 != ok) { |
| perror(path); |
| } |
| } |
| |
| //----------------------------------------------------------------- |
| int main(int argc, char* const argv[]) |
| { |
| SLresult res; |
| SLObjectItf sl; |
| |
| printf("OpenSL ES test %s: decodes a file containing AAC ADTS data\n", argv[0]); |
| |
| if (argc != 2) { |
| printf("Usage: \t%s source_file\n", argv[0]); |
| printf("Example: \"%s /sdcard/myFile.adts\n", argv[0]); |
| exit(EXIT_FAILURE); |
| } |
| |
| // open pathname of encoded ADTS AAC file to get a file descriptor |
| int fd; |
| fd = open(argv[1], O_RDONLY); |
| if (fd < 0) { |
| perror(argv[1]); |
| return EXIT_FAILURE; |
| } |
| |
| SLEngineOption EngineOption[] = { |
| {(SLuint32) SL_ENGINEOPTION_THREADSAFE, (SLuint32) SL_BOOLEAN_TRUE} |
| }; |
| |
| res = slCreateEngine( &sl, 1, EngineOption, 0, NULL, NULL); |
| ExitOnError(res); |
| |
| /* Realizing the SL Engine in synchronous mode. */ |
| res = (*sl)->Realize(sl, SL_BOOLEAN_FALSE); |
| ExitOnError(res); |
| |
| TestDecToBuffQueue(sl, argv[1], fd); |
| |
| /* Shutdown OpenSL ES */ |
| (*sl)->Destroy(sl); |
| |
| // close the file |
| (void) close(fd); |
| |
| return EXIT_SUCCESS; |
| } |
