//-----------------------------------------------------------------------------
void android_audioRecorder_useRecordEventMask(CAudioRecorder *ar) {
IRecord *pRecordItf = &ar->mRecord;
SLuint32 eventFlags = pRecordItf->mCallbackEventsMask;
if (ar->mAudioRecord == 0) {
return;
}
if ((eventFlags & SL_RECORDEVENT_HEADATMARKER) && (pRecordItf->mMarkerPosition != 0)) {
ar->mAudioRecord->setMarkerPosition((uint32_t)((((int64_t)pRecordItf->mMarkerPosition
* sles_to_android_sampleRate(ar->mSampleRateMilliHz)))/1000));
} else {
// clear marker
ar->mAudioRecord->setMarkerPosition(0);
}
if (eventFlags & SL_RECORDEVENT_HEADATNEWPOS) {
SL_LOGV("pos update period %d", pRecordItf->mPositionUpdatePeriod);
ar->mAudioRecord->setPositionUpdatePeriod(
(uint32_t)((((int64_t)pRecordItf->mPositionUpdatePeriod
* sles_to_android_sampleRate(ar->mSampleRateMilliHz)))/1000));
} else {
// clear periodic update
ar->mAudioRecord->setPositionUpdatePeriod(0);
}
if (eventFlags & SL_RECORDEVENT_HEADATLIMIT) {
// FIXME support SL_RECORDEVENT_HEADATLIMIT
SL_LOGD("[ FIXME: IRecord_SetCallbackEventsMask(SL_RECORDEVENT_HEADATLIMIT) on an "
"SL_OBJECTID_AUDIORECORDER to be implemented ]");
}
if (eventFlags & SL_RECORDEVENT_HEADMOVING) {
// FIXME support SL_RECORDEVENT_HEADMOVING
SL_LOGD("[ FIXME: IRecord_SetCallbackEventsMask(SL_RECORDEVENT_HEADMOVING) on an "
"SL_OBJECTID_AUDIORECORDER to be implemented ]");
}
if (eventFlags & SL_RECORDEVENT_BUFFER_FULL) {
// nothing to do for SL_RECORDEVENT_BUFFER_FULL since this will not be encountered on
// recording to buffer queues
}
if (eventFlags & SL_RECORDEVENT_HEADSTALLED) {
// nothing to do for SL_RECORDEVENT_HEADSTALLED, callback event will be checked against mask
// when AudioRecord::EVENT_OVERRUN is encountered
}
}
//--------------------------------------------------
// Event handlers
void LocAVPlayer::onPrepare() {
SL_LOGD("LocAVPlayer::onPrepare()");
sp<IMediaPlayerService> mediaPlayerService(getMediaPlayerService());
if (mediaPlayerService != NULL) {
switch (mDataLocatorType) {
case kDataLocatorUri:
mPlayer = mediaPlayerService->create(mPlayerClient /*IMediaPlayerClient*/,
mPlaybackParams.sessionId);
if (mPlayer == NULL) {
SL_LOGE("media player service failed to create player by URI");
} else if (mPlayer->setDataSource(
CreateHTTPServiceInCurrentJavaContext(),
mDataLocator.uriRef,
NULL /*headers*/) != NO_ERROR) {
SL_LOGE("setDataSource failed");
mPlayer.clear();
}
break;
case kDataLocatorFd:
mPlayer = mediaPlayerService->create(mPlayerClient /*IMediaPlayerClient*/,
mPlaybackParams.sessionId);
if (mPlayer == NULL) {
SL_LOGE("media player service failed to create player by FD");
} else if (mPlayer->setDataSource(mDataLocator.fdi.fd, mDataLocator.fdi.offset,
mDataLocator.fdi.length) != NO_ERROR) {
SL_LOGE("setDataSource failed");
mPlayer.clear();
}
// Binder dups the fd for use by mediaserver, so if we own the fd then OK to close now
if (mDataLocator.fdi.mCloseAfterUse) {
(void) ::close(mDataLocator.fdi.fd);
mDataLocator.fdi.fd = -1;
mDataLocator.fdi.mCloseAfterUse = false;
}
break;
case kDataLocatorNone:
SL_LOGE("no data locator for MediaPlayer object");
break;
default:
SL_LOGE("unsupported data locator %d for MediaPlayer object", mDataLocatorType);
break;
}
}
if (mPlayer == NULL) {
mStateFlags |= kFlagPreparedUnsuccessfully;
}
// blocks until mPlayer is prepared
GenericMediaPlayer::onPrepare();
SL_LOGD("LocAVPlayer::onPrepare() done");
}
//--------------------------------------------------------------------------------------------------
AacBqToPcmCbRenderer::AacBqToPcmCbRenderer(const AudioPlayback_Parameters* params,
IAndroidBufferQueue *androidBufferQueue) :
AudioToCbRenderer(params),
mBqSource(new BufferQueueSource(androidBufferQueue))
{
SL_LOGD("AacBqToPcmCbRenderer::AacBqToPcmCbRenderer()");
}
//--------------------------------------------------------------------------------------------------
AudioToCbRenderer::AudioToCbRenderer(AudioPlayback_Parameters* params) : AudioSfDecoder(params),
mDecodeCbf(NULL),
mDecodeUser(NULL)
{
SL_LOGD("AudioToCbRenderer::AudioToCbRenderer()");
}
XAresult android_Player_getPosition(IPlay *pPlayItf, XAmillisecond *pPosMsec) {
SL_LOGD("android_Player_getPosition()");
XAresult result = XA_RESULT_SUCCESS;
CMediaPlayer *avp = (CMediaPlayer *)pPlayItf->mThis;
switch (avp->mAndroidObjType) {
case AUDIOVIDEOPLAYER_FROM_TS_ANDROIDBUFFERQUEUE: // intended fall-through
case AUDIOVIDEOPLAYER_FROM_URIFD: {
int pos = ANDROID_UNKNOWN_TIME;
if (avp->mAVPlayer != 0) {
avp->mAVPlayer->getPositionMsec(&pos);
}
if (pos == ANDROID_UNKNOWN_TIME) {
*pPosMsec = 0;
} else {
*pPosMsec = (XAmillisecond)pos;
}
} break;
default:
// we shouldn't be here
assert(false);
break;
}
return result;
}
void StreamPlayer::onPlay() {
SL_LOGD("StreamPlayer::onPlay()");
// enqueue a message that will cause StreamAppProxy to consume from the queue (again if the
// player had starved the shared memory)
queueRefilled();
GenericMediaPlayer::onPlay();
}
//--------------------------------------------------------------------------------------------------
StreamPlayer::StreamPlayer(const AudioPlayback_Parameters* params, bool hasVideo,
IAndroidBufferQueue *androidBufferQueue, const sp<CallbackProtector> &callbackProtector) :
GenericMediaPlayer(params, hasVideo),
mAppProxy(new StreamSourceAppProxy(androidBufferQueue, callbackProtector, this)),
mStopForDestroyCompleted(false)
{
SL_LOGD("StreamPlayer::StreamPlayer()");
}
static SLresult IAndroidBufferQueue_Enqueue(SLAndroidBufferQueueItf self,
void *pBufferContext,
void *pData,
SLuint32 dataLength,
const SLAndroidBufferItem *pItems,
SLuint32 itemsLength)
{
SL_ENTER_INTERFACE
SL_LOGD("IAndroidBufferQueue_Enqueue pData=%p dataLength=%d", pData, dataLength);
if ((dataLength > 0) && (NULL == pData)) {
SL_LOGE("Enqueue failure: non-zero data length %u but NULL data pointer", dataLength);
result = SL_RESULT_PARAMETER_INVALID;
} else if ((itemsLength > 0) && (NULL == pItems)) {
SL_LOGE("Enqueue failure: non-zero items length %u but NULL items pointer", itemsLength);
result = SL_RESULT_PARAMETER_INVALID;
} else if ((0 == dataLength) && (0 == itemsLength)) {
// no data and no msg
SL_LOGE("Enqueue failure: trying to enqueue buffer with no data and no items.");
result = SL_RESULT_PARAMETER_INVALID;
// Note that a non-NULL data pointer with zero data length is allowed.
// We track that data pointer as it moves through the queue
// to assist the application in accounting for data buffers.
// A non-NULL items pointer with zero items length is also allowed, but has no value.
} else {
IAndroidBufferQueue *thiz = (IAndroidBufferQueue *) self;
// buffer size check, can be done outside of lock because buffer type can't change
switch (thiz->mBufferType) {
case kAndroidBufferTypeMpeg2Ts:
if (dataLength % MPEG2_TS_PACKET_SIZE == 0) {
// The downstream Stagefright MPEG-2 TS parser is sensitive to format errors,
// so do a quick sanity check beforehand on the first packet of the buffer.
// We don't check all the packets to avoid thrashing the data cache.
if ((dataLength > 0) && (*(SLuint8 *)pData != MPEG2_TS_PACKET_SYNC)) {
SL_LOGE("Error enqueueing MPEG-2 TS data: incorrect packet sync");
result = SL_RESULT_CONTENT_CORRUPTED;
SL_LEAVE_INTERFACE
}
break;
}
SL_LOGE("Error enqueueing MPEG-2 TS data: size must be a multiple of %d (packet size)",
MPEG2_TS_PACKET_SIZE);
result = SL_RESULT_PARAMETER_INVALID;
SL_LEAVE_INTERFACE
break;
case kAndroidBufferTypeAacadts:
// zero dataLength is permitted in case of EOS command only
if (dataLength > 0) {
result = android::AacBqToPcmCbRenderer::validateBufferStartEndOnFrameBoundaries(
pData, dataLength);
if (SL_RESULT_SUCCESS != result) {
SL_LOGE("Error enqueueing ADTS data: data must start and end on frame "
"boundaries");
SL_LEAVE_INTERFACE
}
}
//--------------------------------------------------
// Event handlers
void StreamPlayer::onPrepare() {
SL_LOGD("StreamPlayer::onPrepare()");
sp<IMediaPlayerService> mediaPlayerService(getMediaPlayerService());
if (mediaPlayerService != NULL) {
mPlayer = mediaPlayerService->create(getpid(), mPlayerClient /*IMediaPlayerClient*/,
mPlaybackParams.sessionId);
if (mPlayer == NULL) {
SL_LOGE("media player service failed to create player by app proxy");
} else if (mPlayer->setDataSource(mAppProxy /*IStreamSource*/) != NO_ERROR) {
SL_LOGE("setDataSource failed");
mPlayer.clear();
}
}
if (mPlayer == NULL) {
mStateFlags |= kFlagPreparedUnsuccessfully;
}
GenericMediaPlayer::onPrepare();
SL_LOGD("StreamPlayer::onPrepare() done");
}
void StreamPlayer::onPullFromAndroidBufferQueue() {
SL_LOGD("StreamPlayer::onPullFromAndroidBufferQueue()");
mAppProxy->pullFromBuffQueue();
}
StreamPlayer::~StreamPlayer() {
SL_LOGD("StreamPlayer::~StreamPlayer()");
mAppProxy->disconnect();
}
//--------------------------------------------------
// consumption from ABQ: pull from the ABQ, and push to shared memory (media server)
void StreamSourceAppProxy::pullFromBuffQueue() {
if (android::CallbackProtector::enterCbIfOk(mCallbackProtector)) {
size_t bufferId;
void* bufferLoc;
size_t buffSize;
slAndroidBufferQueueCallback callback = NULL;
void* pBufferContext, *pBufferData, *callbackPContext = NULL;
AdvancedBufferHeader *oldFront = NULL;
uint32_t dataSize /* , dataUsed */;
// retrieve data from the buffer queue
interface_lock_exclusive(mAndroidBufferQueue);
// can this read operation cause us to call the buffer queue callback
// (either because there was a command with no data, or all the data has been consumed)
bool queueCallbackCandidate = false;
if (mAndroidBufferQueue->mState.count != 0) {
// SL_LOGD("nbBuffers in ABQ = %u, buffSize=%u",abq->mState.count, buffSize);
assert(mAndroidBufferQueue->mFront != mAndroidBufferQueue->mRear);
oldFront = mAndroidBufferQueue->mFront;
AdvancedBufferHeader *newFront = &oldFront[1];
// consume events when starting to read data from a buffer for the first time
if (oldFront->mDataSizeConsumed == 0) {
// note this code assumes at most one event per buffer; see IAndroidBufferQueue_Enqueue
if (oldFront->mItems.mTsCmdData.mTsCmdCode & ANDROID_MP2TSEVENT_EOS) {
receivedCmd_l(IStreamListener::EOS);
// EOS has no associated data
queueCallbackCandidate = true;
} else if (oldFront->mItems.mTsCmdData.mTsCmdCode & ANDROID_MP2TSEVENT_DISCONTINUITY) {
receivedCmd_l(IStreamListener::DISCONTINUITY);
} else if (oldFront->mItems.mTsCmdData.mTsCmdCode & ANDROID_MP2TSEVENT_DISCON_NEWPTS) {
sp<AMessage> msg = new AMessage();
msg->setInt64(IStreamListener::kKeyResumeAtPTS,
(int64_t)oldFront->mItems.mTsCmdData.mPts);
receivedCmd_l(IStreamListener::DISCONTINUITY, msg /*msg*/);
} else if (oldFront->mItems.mTsCmdData.mTsCmdCode
& ANDROID_MP2TSEVENT_FORMAT_CHANGE_FULL) {
sp<AMessage> msg = new AMessage();
msg->setInt32(
IStreamListener::kKeyDiscontinuityMask,
ATSParser::DISCONTINUITY_FORMATCHANGE);
receivedCmd_l(IStreamListener::DISCONTINUITY, msg /*msg*/);
} else if (oldFront->mItems.mTsCmdData.mTsCmdCode
& ANDROID_MP2TSEVENT_FORMAT_CHANGE_VIDEO) {
sp<AMessage> msg = new AMessage();
msg->setInt32(
IStreamListener::kKeyDiscontinuityMask,
ATSParser::DISCONTINUITY_VIDEO_FORMAT);
receivedCmd_l(IStreamListener::DISCONTINUITY, msg /*msg*/);
}
// note that here we are intentionally only supporting
// ANDROID_MP2TSEVENT_FORMAT_CHANGE_VIDEO, see IAndroidBufferQueue.c
// some commands may introduce a time discontinuity, reevaluate position if needed
if (oldFront->mItems.mTsCmdData.mTsCmdCode & (ANDROID_MP2TSEVENT_DISCONTINUITY |
ANDROID_MP2TSEVENT_DISCON_NEWPTS | ANDROID_MP2TSEVENT_FORMAT_CHANGE_FULL)) {
const sp<StreamPlayer> player(mPlayer.promote());
if (player != NULL) {
// FIXME see note at onSeek
player->seek(ANDROID_UNKNOWN_TIME);
}
}
oldFront->mItems.mTsCmdData.mTsCmdCode = ANDROID_MP2TSEVENT_NONE;
}
{
// we're going to change the shared mem buffer queue, so lock it
Mutex::Autolock _l(mLock);
if (!mAvailableBuffers.empty()) {
bufferId = *mAvailableBuffers.begin();
CHECK_LT(bufferId, mBuffers.size());
sp<IMemory> mem = mBuffers.itemAt(bufferId);
bufferLoc = mem->pointer();
buffSize = mem->size();
char *pSrc = ((char*)oldFront->mDataBuffer) + oldFront->mDataSizeConsumed;
if (oldFront->mDataSizeConsumed + buffSize < oldFront->mDataSize) {
// more available than requested, copy as much as requested
// consume data: 1/ copy to given destination
memcpy(bufferLoc, pSrc, buffSize);
// 2/ keep track of how much has been consumed
oldFront->mDataSizeConsumed += buffSize;
// 3/ notify shared mem listener that new data is available
receivedBuffer_l(bufferId, buffSize);
mAvailableBuffers.erase(mAvailableBuffers.begin());
} else {
// requested as much available or more: consume the whole of the current
// buffer and move to the next
size_t consumed = oldFront->mDataSize - oldFront->mDataSizeConsumed;
//SL_LOGD("consuming rest of buffer: enqueueing=%u", consumed);
oldFront->mDataSizeConsumed = oldFront->mDataSize;
// move queue to next
if (newFront == &mAndroidBufferQueue->
mBufferArray[mAndroidBufferQueue->mNumBuffers + 1]) {
// reached the end, circle back
newFront = mAndroidBufferQueue->mBufferArray;
}
mAndroidBufferQueue->mFront = newFront;
mAndroidBufferQueue->mState.count--;
mAndroidBufferQueue->mState.index++;
if (consumed > 0) {
// consume data: 1/ copy to given destination
memcpy(bufferLoc, pSrc, consumed);
// 2/ keep track of how much has been consumed
// here nothing to do because we are done with this buffer
// 3/ notify StreamPlayer that new data is available
receivedBuffer_l(bufferId, consumed);
mAvailableBuffers.erase(mAvailableBuffers.begin());
}
// data has been consumed, and the buffer queue state has been updated
// we will notify the client if applicable
queueCallbackCandidate = true;
}
}
if (queueCallbackCandidate) {
if (mAndroidBufferQueue->mCallbackEventsMask &
SL_ANDROIDBUFFERQUEUEEVENT_PROCESSED) {
callback = mAndroidBufferQueue->mCallback;
// save callback data while under lock
callbackPContext = mAndroidBufferQueue->mContext;
pBufferContext = (void *)oldFront->mBufferContext;
pBufferData = (void *)oldFront->mDataBuffer;
dataSize = oldFront->mDataSize;
// here a buffer is only dequeued when fully consumed
//dataUsed = oldFront->mDataSizeConsumed;
}
}
//SL_LOGD("%d buffers available after reading from queue", mAvailableBuffers.size());
if (!mAvailableBuffers.empty()) {
// there is still room in the shared memory, recheck later if we can pull
// data from the buffer queue and write it to shared memory
const sp<StreamPlayer> player(mPlayer.promote());
if (player != NULL) {
player->queueRefilled();
}
}
}
} else { // empty queue
SL_LOGD("ABQ empty, starving!");
}
interface_unlock_exclusive(mAndroidBufferQueue);
// notify client of buffer processed
if (NULL != callback) {
SLresult result = (*callback)(&mAndroidBufferQueue->mItf, callbackPContext,
pBufferContext, pBufferData, dataSize,
dataSize, /* dataUsed */
// no messages during playback other than marking the buffer as processed
(const SLAndroidBufferItem*)(&kItemProcessed) /* pItems */,
NB_BUFFEREVENT_ITEM_FIELDS *sizeof(SLuint32) /* itemsLength */ );
if (SL_RESULT_SUCCESS != result) {
// Reserved for future use
SL_LOGW("Unsuccessful result %d returned from AndroidBufferQueueCallback", result);
}
}
mCallbackProtector->exitCb();
} // enterCbIfOk
}
void AudioToCbRenderer::updateAudioSink() {
SL_LOGD("AudioToCbRenderer::updateAudioSink()");
}
void AudioToCbRenderer::startAudioSink() {
SL_LOGD("AudioToCbRenderer::startAudioSink()");
}
AacBqToPcmCbRenderer::~AacBqToPcmCbRenderer() {
SL_LOGD("AacBqToPcmCbRenderer::~AacBqToPcmCbRenderer()");
}
status_t BufferQueueSource::getSize(off64_t *size) {
SL_LOGD("BufferQueueSource::getSize()");
// we're streaming, we don't know how much there is
*size = 0;
return ERROR_UNSUPPORTED;
}
void AudioToCbRenderer::pauseAudioSink() {
SL_LOGD("AudioToCbRenderer::pauseAudioSink()");
}
LocAVPlayer::~LocAVPlayer() {
SL_LOGD("LocAVPlayer::~LocAVPlayer()");
}
//--------------------------------------------------------------------------------------------------
LocAVPlayer::LocAVPlayer(const AudioPlayback_Parameters* params, bool hasVideo) :
GenericMediaPlayer(params, hasVideo)
{
SL_LOGD("LocAVPlayer::LocAVPlayer()");
}
BufferQueueSource::~BufferQueueSource() {
SL_LOGD("BufferQueueSource::~BufferQueueSource");
}
AudioToCbRenderer::~AudioToCbRenderer() {
SL_LOGD("AudioToCbRenderer::~AudioToCbRenderer()");
}
//--------------------------------------------------
// Event handlers
void AacBqToPcmCbRenderer::onPrepare() {
SL_LOGD("AacBqToPcmCbRenderer::onPrepare()");
Mutex::Autolock _l(mBufferSourceLock);
// Initialize the PCM format info with the known parameters before the start of the decode
{
android::Mutex::Autolock autoLock(mPcmFormatLock);
mPcmFormatValues[ANDROID_KEY_INDEX_PCMFORMAT_BITSPERSAMPLE] = SL_PCMSAMPLEFORMAT_FIXED_16;
mPcmFormatValues[ANDROID_KEY_INDEX_PCMFORMAT_CONTAINERSIZE] = 16;
//FIXME not true on all platforms
mPcmFormatValues[ANDROID_KEY_INDEX_PCMFORMAT_ENDIANNESS] = SL_BYTEORDER_LITTLEENDIAN;
// initialization with the default values: they will be replaced by the actual values
// once the decoder has figured them out
mPcmFormatValues[ANDROID_KEY_INDEX_PCMFORMAT_NUMCHANNELS] = UNKNOWN_NUMCHANNELS;
mPcmFormatValues[ANDROID_KEY_INDEX_PCMFORMAT_SAMPLERATE] = UNKNOWN_SAMPLERATE;
mPcmFormatValues[ANDROID_KEY_INDEX_PCMFORMAT_CHANNELMASK] = SL_ANDROID_UNKNOWN_CHANNELMASK;
}
sp<MediaExtractor> extractor = new AacAdtsExtractor(mBqSource);
// only decoding a single track of data
const size_t kTrackToDecode = 0;
sp<IMediaSource> source = extractor->getTrack(kTrackToDecode);
if (source == 0) {
SL_LOGE("AacBqToPcmCbRenderer::onPrepare: error getting source from extractor");
notifyPrepared(ERROR_UNSUPPORTED);
return;
}
// the audio content is not raw PCM, so we need a decoder
source = SimpleDecodingSource::Create(source);
if (source == NULL) {
SL_LOGE("AacBqToPcmCbRenderer::onPrepare: Could not instantiate decoder.");
notifyPrepared(ERROR_UNSUPPORTED);
return;
}
sp<MetaData> meta = source->getFormat();
SL_LOGD("AacBqToPcmCbRenderer::onPrepare() after instantiating decoder");
if (source->start() != OK) {
SL_LOGE("AacBqToPcmCbRenderer::onPrepare() Failed to start source/decoder.");
notifyPrepared(MEDIA_ERROR_BASE);
return;
}
//---------------------------------
int32_t channelCount;
CHECK(meta->findInt32(kKeyChannelCount, &channelCount));
int32_t sr;
CHECK(meta->findInt32(kKeySampleRate, &sr));
// FIXME similar to AudioSfDecoder::onPrepare()
// already "good to go" (compare to AudioSfDecoder::onPrepare)
mCacheStatus = kStatusHigh;
mCacheFill = 1000;
notifyStatus();
notifyCacheFill();
{
android::Mutex::Autolock autoLock(mPcmFormatLock);
mPcmFormatValues[ANDROID_KEY_INDEX_PCMFORMAT_SAMPLERATE] = sr;
mPcmFormatValues[ANDROID_KEY_INDEX_PCMFORMAT_NUMCHANNELS] = channelCount;
mPcmFormatValues[ANDROID_KEY_INDEX_PCMFORMAT_CHANNELMASK] =
sles_channel_out_mask_from_count(channelCount);
}
SL_LOGV("AacBqToPcmCbRenderer::onPrepare() channel count=%d SR=%d",
channelCount, sr);
//---------------------------------
// The data source, and audio source (a decoder) are ready to be used
mDataSource = mBqSource;
mAudioSource = source;
mAudioSourceStarted = true;
//-------------------------------------
// signal successful completion of prepare
mStateFlags |= kFlagPrepared;
// skipping past AudioToCbRenderer and AudioSfDecoder
GenericPlayer::onPrepare();
SL_LOGD("AacBqToPcmCbRenderer::onPrepare() done, mStateFlags=0x%x", mStateFlags);
}
ssize_t BufferQueueSource::readAt(off64_t offset, void *data, size_t size) {
SL_LOGD("BufferQueueSource::readAt(offset=%lld, data=%p, size=%d)", offset, data, size);
if (mEosReached) {
// once EOS has been received from the buffer queue, you can't read anymore
return 0;
}
ssize_t readSize;
slAndroidBufferQueueCallback callback = NULL;
void* pBufferContext, *pBufferData, *callbackPContext;
uint32_t dataSize, dataUsed;
interface_lock_exclusive(mAndroidBufferQueueSource);
if (mAndroidBufferQueueSource->mState.count == 0) {
readSize = 0;
} else {
assert(mAndroidBufferQueueSource->mFront != mAndroidBufferQueueSource->mRear);
AdvancedBufferHeader *oldFront = mAndroidBufferQueueSource->mFront;
AdvancedBufferHeader *newFront = &oldFront[1];
// where to read from
char *pSrc = NULL;
// can this read operation cause us to call the buffer queue callback
// (either because there was a command with no data, or all the data has been consumed)
bool queueCallbackCandidate = false;
// consume events when starting to read data from a buffer for the first time
if (oldFront->mDataSizeConsumed == 0) {
if (oldFront->mItems.mAdtsCmdData.mAdtsCmdCode & ANDROID_ADTSEVENT_EOS) {
mEosReached = true;
// EOS has no associated data
queueCallbackCandidate = true;
}
oldFront->mItems.mAdtsCmdData.mAdtsCmdCode = ANDROID_ADTSEVENT_NONE;
}
//assert(mStreamToBqOffset <= offset);
CHECK_LE(mStreamToBqOffset, offset);
if (offset + (off64_t) size <= mStreamToBqOffset + oldFront->mDataSize) {
pSrc = ((char*)oldFront->mDataBuffer) + (offset - mStreamToBqOffset);
if (offset - mStreamToBqOffset + size == oldFront->mDataSize) {
// consumed buffer entirely
oldFront->mDataSizeConsumed = oldFront->mDataSize;
mStreamToBqOffset += oldFront->mDataSize;
queueCallbackCandidate = true;
// move queue to next buffer
if (newFront == &mAndroidBufferQueueSource->
mBufferArray[mAndroidBufferQueueSource->mNumBuffers + 1]) {
// reached the end, circle back
newFront = mAndroidBufferQueueSource->mBufferArray;
}
mAndroidBufferQueueSource->mFront = newFront;
// update the queue state
mAndroidBufferQueueSource->mState.count--;
mAndroidBufferQueueSource->mState.index++;
SL_LOGV("BufferQueueSource moving to next buffer");
}
}
// consume data: copy to given destination
if (NULL != pSrc) {
memcpy(data, pSrc, size);
readSize = size;
} else {
readSize = 0;
}
if (queueCallbackCandidate) {
// data has been consumed, and the buffer queue state has been updated
// we will notify the client if applicable
if (mAndroidBufferQueueSource->mCallbackEventsMask &
SL_ANDROIDBUFFERQUEUEEVENT_PROCESSED) {
callback = mAndroidBufferQueueSource->mCallback;
// save callback data while under lock
callbackPContext = mAndroidBufferQueueSource->mContext;
pBufferContext = (void *)oldFront->mBufferContext;
pBufferData = (void *)oldFront->mDataBuffer;
dataSize = oldFront->mDataSize;
dataUsed = oldFront->mDataSizeConsumed;
}
}
}
interface_unlock_exclusive(mAndroidBufferQueueSource);
// notify client
if (NULL != callback) {
SLresult result = (*callback)(&mAndroidBufferQueueSource->mItf, callbackPContext,
pBufferContext, pBufferData, dataSize, dataUsed,
// no messages during playback other than marking the buffer as processed
(const SLAndroidBufferItem*)(&kItemProcessed) /* pItems */,
NB_BUFFEREVENT_ITEM_FIELDS * sizeof(SLuint32) /* itemsLength */ );
if (SL_RESULT_SUCCESS != result) {
// Reserved for future use
SL_LOGW("Unsuccessful result %d returned from AndroidBufferQueueCallback", result);
}
}
return readSize;
}