void NuPlayer::RTSPSource::onPollBuffering() {
bool prepared, underflow, overflow, startServer, finished;
checkBuffering(&prepared, &underflow, &overflow, &startServer, &finished);
if (prepared && mInPreparationPhase) {
mInPreparationPhase = false;
notifyPrepared();
}
if (!mInPreparationPhase && underflow) {
startBufferingIfNecessary();
}
if (haveSufficientDataOnAllTracks()) {
stopBufferingIfNecessary();
}
if (overflow && mHandler != NULL) {
mHandler->pause();
}
if (startServer && mHandler != NULL) {
mHandler->resume();
}
if (finished && mHandler != NULL) {
mHandler->cancelAccessUnitTimeoutCheck();
}
schedulePollBuffering();
}
bool NuPlayer::RTSPSource::stopBufferingIfNecessary() {
Mutex::Autolock _l(mBufferingLock);
if (mBuffering) {
if (!haveSufficientDataOnAllTracks()) {
return false;
}
mBuffering = false;
sp<AMessage> notify = dupNotify();
notify->setInt32("what", kWhatResumeOnBufferingEnd);
notify->post();
}
return true;
}
status_t NuPlayer::RTSPSource::dequeueAccessUnit(
bool audio, sp<ABuffer> *accessUnit) {
if (mBuffering) {
if (!haveSufficientDataOnAllTracks()) {
return -EWOULDBLOCK;
}
mBuffering = false;
sp<AMessage> notify = dupNotify();
notify->setInt32("what", kWhatBufferingEnd);
notify->post();
}
sp<AnotherPacketSource> source = getSource(audio);
if (source == NULL) {
return -EWOULDBLOCK;
}
status_t finalResult;
if (!source->hasBufferAvailable(&finalResult)) {
if (finalResult == OK) {
int64_t mediaDurationUs = 0;
getDuration(&mediaDurationUs);
sp<AnotherPacketSource> otherSource = getSource(!audio);
status_t otherFinalResult;
// If other source already signaled EOS, this source should also signal EOS
if (otherSource != NULL &&
!otherSource->hasBufferAvailable(&otherFinalResult) &&
otherFinalResult == ERROR_END_OF_STREAM) {
source->signalEOS(ERROR_END_OF_STREAM);
return ERROR_END_OF_STREAM;
}
// If this source has detected near end, give it some time to retrieve more
// data before signaling EOS
if (source->isFinished(mediaDurationUs)) {
int64_t eosTimeout = audio ? mEOSTimeoutAudio : mEOSTimeoutVideo;
if (eosTimeout == 0) {
setEOSTimeout(audio, ALooper::GetNowUs());
} else if ((ALooper::GetNowUs() - eosTimeout) > kNearEOSTimeoutUs) {
setEOSTimeout(audio, 0);
source->signalEOS(ERROR_END_OF_STREAM);
return ERROR_END_OF_STREAM;
}
return -EWOULDBLOCK;
}
if (!(otherSource != NULL && otherSource->isFinished(mediaDurationUs))) {
// We should not enter buffering mode
// if any of the sources already have detected EOS.
mBuffering = true;
sp<AMessage> notify = dupNotify();
notify->setInt32("what", kWhatBufferingStart);
notify->post();
}
return -EWOULDBLOCK;
}
return finalResult;
}
setEOSTimeout(audio, 0);
return source->dequeueAccessUnit(accessUnit);
}