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; } }