void AVDemuxThread::run()
{
m_buffering = false;
end = false;
if (audio_thread && !audio_thread->isRunning())
audio_thread->start(QThread::HighPriority);
if (video_thread && !video_thread->isRunning())
video_thread->start();
int stream = 0;
Packet pkt;
pause(false);
qDebug("get av queue a/v thread = %p %p", audio_thread, video_thread);
PacketBuffer *aqueue = audio_thread ? audio_thread->packetQueue() : 0;
PacketBuffer *vqueue = video_thread ? video_thread->packetQueue() : 0;
// aqueue as a primary buffer: music with/without cover
AVThread* thread = !video_thread || (audio_thread && demuxer->hasAttacedPicture()) ? audio_thread : video_thread;
m_buffer = thread->packetQueue();
const qint64 buf2 = aqueue ? aqueue->bufferValue() : 1; // TODO: may be changed by user. Deal with audio track change
if (aqueue) {
aqueue->clear();
aqueue->setBlocking(true);
}
if (vqueue) {
vqueue->clear();
vqueue->setBlocking(true);
}
connect(thread, SIGNAL(seekFinished(qint64)), this, SIGNAL(seekFinished(qint64)), Qt::DirectConnection);
seek_tasks.clear();
bool was_end = false;
if (ademuxer) {
ademuxer->seek(0LL);
}
while (!end) {
processNextSeekTask();
//vthread maybe changed by AVPlayer.setPriority() from no dec case
vqueue = video_thread ? video_thread->packetQueue() : 0;
if (demuxer->atEnd()) {
// if avthread may skip 1st eof packet because of a/v sync
if (aqueue && (!was_end || aqueue->isEmpty())) {
aqueue->put(Packet::createEOF());
aqueue->blockEmpty(false); // do not block if buffer is not enough. block again on seek
}
if (vqueue && (!was_end || vqueue->isEmpty())) {
vqueue->put(Packet::createEOF());
vqueue->blockEmpty(false);
}
m_buffering = false;
Q_EMIT mediaStatusChanged(QtAV::BufferedMedia);
was_end = true;
// wait for a/v thread finished
msleep(100);
continue;
}
was_end = false;
if (tryPause()) {
continue; //the queue is empty and will block
}
updateBufferState();
if (!demuxer->readFrame()) {
continue;
}
stream = demuxer->stream();
pkt = demuxer->packet();
Packet apkt;
bool audio_has_pic = demuxer->hasAttacedPicture();
int a_ext = 0;
if (ademuxer) {
QMutexLocker locker(&buffer_mutex);
Q_UNUSED(locker);
if (ademuxer) {
a_ext = -1;
audio_has_pic = ademuxer->hasAttacedPicture();
// FIXME: buffer full but buffering!!!
// avoid read external track everytime. aqueue may not block full
// vqueue will not block if aqueue is not enough
if (!aqueue->isFull() || aqueue->isBuffering()) {
if (ademuxer->readFrame()) {
if (ademuxer->stream() == ademuxer->audioStream()) {
a_ext = 1;
apkt = ademuxer->packet();
}
}
// no continue otherwise. ademuxer finished earlier than demuxer
}
}
}
//qDebug("vqueue: %d, aqueue: %d/isbuffering %d isfull: %d, buffer: %d/%d", vqueue->size(), aqueue->size(), aqueue->isBuffering(), aqueue->isFull(), aqueue->buffered(), aqueue->bufferValue());
//QMutexLocker locker(&buffer_mutex); //TODO: seems we do not need to lock
//Q_UNUSED(locker);
/*1 is empty but another is enough, then do not block to
ensure the empty one can put packets immediatly.
But usually it will not happen, why?
*/
/* demux thread will be blocked only when 1 queue is full and still put
* if vqueue is full and aqueue becomes empty, then demux thread
* will be blocked. so we should wake up another queue when empty(or threshold?).
* TODO: the video stream and audio stream may be group by group. provide it
* stream data: aaaaaaavvvvvvvaaaaaaaavvvvvvvvvaaaaaa, it happens
* stream data: aavavvavvavavavavavavavavvvaavavavava, it's ok
*/
//TODO: use cache queue, take from cache queue if not empty?
const bool a_internal = stream == demuxer->audioStream();
if (a_internal || a_ext > 0) {//apkt.isValid()) {
if (a_internal && !a_ext) // internal is always read even if external audio used
apkt = demuxer->packet();
/* if vqueue if not blocked and full, and aqueue is empty, then put to
* vqueue will block demuex thread
*/
if (aqueue) {
if (!audio_thread || !audio_thread->isRunning()) {
aqueue->clear();
continue;
}
// must ensure bufferValue set correctly before continue
if (m_buffer != aqueue)
aqueue->setBufferValue(m_buffer->isBuffering() ? std::numeric_limits<qint64>::max() : buf2);
// always block full if no vqueue because empty callback may set false
// attached picture is cover for song, 1 frame
aqueue->blockFull(!video_thread || !video_thread->isRunning() || !vqueue || audio_has_pic);
// external audio: a_ext < 0, stream = audio_idx=>put invalid packet
if (a_ext >= 0)
aqueue->put(apkt); //affect video_thread
}
}
// always check video stream if use external audio
if (stream == demuxer->videoStream()) {
if (vqueue) {
if (!video_thread || !video_thread->isRunning()) {
vqueue->clear();
continue;
}
vqueue->blockFull(!audio_thread || !audio_thread->isRunning() || !aqueue || aqueue->isEnough());
vqueue->put(pkt); //affect audio_thread
}
} else if (demuxer->subtitleStreams().contains(stream)) { //subtitle
Q_EMIT internalSubtitlePacketRead(demuxer->subtitleStreams().indexOf(stream), pkt);
} else {
continue;
}
}
m_buffering = false;
m_buffer = 0;
while (audio_thread && audio_thread->isRunning()) {
qDebug("waiting audio thread.......");
aqueue->blockEmpty(false); //FIXME: why need this
audio_thread->wait(500);
}
while (video_thread && video_thread->isRunning()) {
qDebug("waiting video thread.......");
vqueue->blockEmpty(false);
video_thread->wait(500);
}
thread->disconnect(this, SIGNAL(seekFinished(qint64)));
qDebug("Demux thread stops running....");
emit mediaStatusChanged(QtAV::EndOfMedia);
}
void AVDemuxThread::run()
{
end = false;
if (audio_thread && !audio_thread->isRunning())
audio_thread->start(QThread::HighPriority);
if (video_thread && !video_thread->isRunning())
video_thread->start();
int running_threads = 0;
if (audio_thread)
++running_threads;
if (video_thread)
++running_threads;
qDebug("demux thread start running...%d avthreads", running_threads);
audio_stream = demuxer->audioStream();
video_stream = demuxer->videoStream();
int index = 0;
Packet pkt;
pause(false);
qDebug("get av queue a/v thread = %p %p", audio_thread, video_thread);
PacketQueue *aqueue = audio_thread ? audio_thread->packetQueue() : 0;
PacketQueue *vqueue = video_thread ? video_thread->packetQueue() : 0;
if (aqueue) {
aqueue->clear();
aqueue->setBlocking(true);
}
if (vqueue) {
vqueue->clear();
vqueue->setBlocking(true);
}
while (!end) {
processNextSeekTask();
#if RESUME_ONCE_ON_SEEK
// resume once is not enough. readFrame() failed after seek (why?) and we need video packet
processNextPauseTask();
if (tryPause()) {
#else
if (tryPause(ULONG_MAX)) {
#endif
continue; //the queue is empty and will block
}
running_threads = (audio_thread && audio_thread->isRunning()) + (video_thread && video_thread->isRunning());
if (!running_threads) {
qDebug("no running avthreads. exit demuxer thread");
break;
}
QMutexLocker locker(&buffer_mutex);
Q_UNUSED(locker);
if (end) {
break;
}
if (!demuxer->readFrame()) {
continue;
}
index = demuxer->stream();
pkt = *demuxer->packet(); //TODO: how to avoid additional copy?
//connect to stop is ok too
if (pkt.isEnd()) {
qDebug("read end packet %d A:%d V:%d", index, audio_stream, video_stream);
end = true;
//avthread can stop. do not clear queue, make sure all data are played
if (audio_thread) {
audio_thread->setDemuxEnded(true);
}
if (video_thread) {
video_thread->setDemuxEnded(true);
}
break;
}
/*1 is empty but another is enough, then do not block to
ensure the empty one can put packets immediatly.
But usually it will not happen, why?
*/
/* demux thread will be blocked only when 1 queue is full and still put
* if vqueue is full and aqueue becomes empty, then demux thread
* will be blocked. so we should wake up another queue when empty(or threshold?).
* TODO: the video stream and audio stream may be group by group. provide it
* stream data: aaaaaaavvvvvvvaaaaaaaavvvvvvvvvaaaaaa, it happens
* stream data: aavavvavvavavavavavavavavvvaavavavava, it's ok
*/
//TODO: use cache queue, take from cache queue if not empty?
if (index == audio_stream) {
/* if vqueue if not blocked and full, and aqueue is empty, then put to
* vqueue will block demuex thread
*/
if (aqueue) {
if (!audio_thread || !audio_thread->isRunning()) {
aqueue->clear();
continue;
}
if (vqueue)
aqueue->blockFull(vqueue->isEnough() || demuxer->hasAttacedPicture());
aqueue->put(pkt); //affect video_thread
}
} else if (index == video_stream) {
if (!video_thread || !video_thread->isRunning()) {
vqueue->clear();
continue;
}
if (vqueue) {
if (aqueue)
vqueue->blockFull(aqueue->isEnough());
vqueue->put(pkt); //affect audio_thread
}
} else { //subtitle
continue;
}
}
//flush. seeking will be omitted when stopped
if (aqueue)
aqueue->put(Packet());
if (vqueue)
vqueue->put(Packet());
while (audio_thread && audio_thread->isRunning()) {
qDebug("waiting audio thread.......");
audio_thread->wait(500);
}
while (video_thread && video_thread->isRunning()) {
qDebug("waiting video thread.......");
video_thread->wait(500);
}
qDebug("Demux thread stops running....");
}
bool AVDemuxThread::tryPause(unsigned long timeout)
{
if (!paused)
return false;
QMutexLocker lock(&buffer_mutex);
Q_UNUSED(lock);
cond.wait(&buffer_mutex, timeout);
return true;
}
} //namespace QtAV
