void AVDemuxThread::stepForward()
{
if (end)
return;
// clock type will be wrong if no lock because slot frameDeliveredOnStepForward() is in video thread
QMutexLocker locker(&next_frame_mutex);
Q_UNUSED(locker);
pause(true); // must pause AVDemuxThread (set user_paused true)
AVThread* av[] = {video_thread, audio_thread};
bool connected = false;
for (size_t i = 0; i < sizeof(av)/sizeof(av[0]); ++i) {
AVThread *t = av[i];
if (!t)
continue;
// set clock first
if (clock_type < 0)
clock_type = (int)t->clock()->isClockAuto() + 2*(int)t->clock()->clockType();
t->clock()->setClockType(AVClock::VideoClock);
t->scheduleFrameDrop(false);
t->pause(false);
t->packetQueue()->blockFull(false);
if (!connected) {
connect(t, SIGNAL(frameDelivered()), this, SLOT(frameDeliveredOnStepForward()), Qt::DirectConnection);
connect(t, SIGNAL(eofDecoded()), this, SLOT(eofDecodedOnStepForward()), Qt::DirectConnection);
connected = true;
}
}
Q_EMIT requestClockPause(false);
pauseInternal(false);
}
void AVDemuxThread::frameDeliveredOnStepForward()
{
AVThread *thread = video_thread ? video_thread : audio_thread;
Q_ASSERT(thread);
QMutexLocker locker(&next_frame_mutex);
Q_UNUSED(locker);
disconnect(thread, SIGNAL(frameDelivered()), this, SLOT(frameDeliveredOnStepForward()));
disconnect(thread, SIGNAL(eofDecoded()), this, SLOT(eofDecodedOnStepForward()));
if (user_paused) {
pause(true); // restore pause state
Q_EMIT requestClockPause(true); // need direct connection
// pause both video and audio thread
if (video_thread)
video_thread->pause(true);
if (audio_thread)
audio_thread->pause(true);
}
if (clock_type >= 0) {
thread->clock()->setClockAuto(clock_type & 1);
thread->clock()->setClockType(AVClock::ClockType(clock_type/2));
clock_type = -1;
thread->clock()->updateExternalClock((thread->previousHistoryPts() - thread->clock()->initialValue())*1000.0);
}
Q_EMIT stepFinished();
}
void AVDemuxThread::eofDecodedOnStepForward()
{
AVThread *thread = video_thread ? video_thread : audio_thread;
Q_ASSERT(thread);
QMutexLocker locker(&next_frame_mutex);
Q_UNUSED(locker);
disconnect(thread, SIGNAL(frameDelivered()), this, SLOT(frameDeliveredOnStepForward()));
disconnect(thread, SIGNAL(eofDecoded()), this, SLOT(eofDecodedOnStepForward()));
pause(false);
end = true;
if (clock_type >= 0) {
thread->clock()->setClockAuto(clock_type & 1);
thread->clock()->setClockType(AVClock::ClockType(clock_type/2));
clock_type = -1;
}
}
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);
connect(thread, SIGNAL(eofDecoded()), this, SLOT(eofDecoded()));
seek_tasks.clear();
int was_end = 0;
if (ademuxer) {
ademuxer->seek(0LL);
}
qreal last_apts = 0;
qreal last_vpts = 0;
AutoSem as(&sem);
Q_UNUSED(as);
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
const int kMaxEof = 1;//if buffer packet, we can use qMax(aqueue->bufferValue(), vqueue->bufferValue()) and not call blockEmpty(false);
if (aqueue && (!was_end || aqueue->isEmpty())) {
if (was_end < kMaxEof)
aqueue->put(Packet::createEOF());
const qreal dpts = last_vpts - last_apts;
if (dpts > 0.1) {
Packet fake_apkt;
fake_apkt.duration = last_vpts - qMin(thread->clock()->videoTime(), thread->clock()->value()); // FIXME: when clock value < 0?
qDebug("audio is too short than video: %.3f, fake_apkt.duration: %.3f", dpts, fake_apkt.duration);
last_apts = last_vpts = 0; // if not reset to 0, for example real eof pts, then no fake apkt after seek because dpts < 0
aqueue->put(fake_apkt);
}
aqueue->blockEmpty(was_end >= kMaxEof); // do not block if buffer is not enough. block again on seek
}
if (vqueue && (!was_end || vqueue->isEmpty())) {
if (was_end < kMaxEof)
vqueue->put(Packet::createEOF());
vqueue->blockEmpty(was_end >= kMaxEof);
}
if (m_buffering) {
m_buffering = false;
Q_EMIT mediaStatusChanged(QtAV::BufferedMedia);
Q_EMIT mediaStatusChanged(QtAV::EndOfMedia);
}
was_end = qMin(was_end + 1, kMaxEof);
bool exit_thread = !user_paused;
if (aqueue)
exit_thread &= aqueue->isEmpty();
if (vqueue)
exit_thread &= vqueue->isEmpty();
if (exit_thread) {
if (!(mediaEndAction() & MediaEndAction_Pause))
break;
pause(true);
Q_EMIT requestClockPause(true);
if (aqueue)
aqueue->blockEmpty(true);
if (vqueue)
vqueue->blockEmpty(true);
}
// wait for a/v thread finished
msleep(100);
continue;
}
was_end = 0;
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();
last_apts = apkt.pts;
/* 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
last_vpts = pkt.pts;
}
} 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.......");
Packet quit_pkt(Packet::createEOF());
quit_pkt.position = 0;
aqueue->put(quit_pkt);
aqueue->blockEmpty(false); //FIXME: why need this
audio_thread->pause(false);
audio_thread->wait(500);
}
while (video_thread && video_thread->isRunning()) {
qDebug("waiting video thread.......");
Packet quit_pkt(Packet::createEOF());
quit_pkt.position = 0;
vqueue->put(quit_pkt);
vqueue->blockEmpty(false);
video_thread->pause(false);
video_thread->wait(500);
}
thread->disconnect(this, SIGNAL(eofDecoded()));
thread->disconnect(this, SIGNAL(seekFinished(qint64)));
qDebug("Demux thread stops running....");
}