void AVDemuxThread::nextFrame()
{
// clock type will be wrong if no lock because slot frameDeliveredNextFrame() 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(frameDeliveredNextFrame()), Qt::DirectConnection);
connected = true;
}
}
emit requestClockPause(false);
nb_next_frame.ref();
pauseInternal(false);
}
void AVDemuxThread::seekInternal(qint64 pos, SeekType type)
{
AVThread* av[] = { audio_thread, video_thread};
qDebug("seek to %s %lld ms (%f%%)", QTime(0, 0, 0).addMSecs(pos).toString().toUtf8().constData(), pos, double(pos - demuxer->startTime())/double(demuxer->duration())*100.0);
demuxer->setSeekType(type);
demuxer->seek(pos);
if (ademuxer) {
ademuxer->setSeekType(type);
ademuxer->seek(pos);
}
AVThread *watch_thread = 0;
// TODO: why queue may not empty?
int sync_id = 0;
for (size_t i = 0; i < sizeof(av)/sizeof(av[0]); ++i) {
AVThread *t = av[i];
if (!t)
continue;
if (!sync_id)
sync_id = t->clock()->syncStart(!!audio_thread + !!video_thread);
Q_ASSERT(sync_id != 0);
qDebug("demuxer sync id: %d/%d", sync_id, t->clock()->syncId());
t->packetQueue()->clear();
t->requestSeek();
// TODO: the first frame (key frame) will not be decoded correctly if flush() is called.
//PacketBuffer *pb = t->packetQueue();
//qDebug("%s put seek packet. %d/%d-%.3f, progress: %.3f", t->metaObject()->className(), pb->buffered(), pb->bufferValue(), pb->bufferMax(), pb->bufferProgress());
t->packetQueue()->setBlocking(false); // aqueue bufferValue can be small (1), we can not put and take
Packet pkt;
pkt.pts = qreal(pos)/1000.0;
pkt.position = sync_id;
t->packetQueue()->put(pkt);
t->packetQueue()->setBlocking(true); // blockEmpty was false when eof is read.
if (isPaused()) { //TODO: deal with pause in AVThread?
t->pause(false);
watch_thread = t;
}
}
if (watch_thread) {
pauseInternal(false);
Q_EMIT requestClockPause(false); // need direct connection
// direct connection is fine here
connect(watch_thread, SIGNAL(seekFinished(qint64)), this, SLOT(seekOnPauseFinished()), Qt::DirectConnection);
}
}