Exemplo n.º 1
0
void AVDemuxThread::stepBackward()
{
    if (!video_thread)
        return;
    AVThread *t = video_thread;
    const qreal pre_pts = video_thread->previousHistoryPts();
    if (pre_pts == 0.0) {
        qWarning("can not get previous pts");
        return;
    }
    end = false;
    // queue maybe blocked by put()
    if (audio_thread) {
        audio_thread->packetQueue()->clear(); // will put new packets before task run
    }

    class stepBackwardTask : public QRunnable {
    public:
        stepBackwardTask(AVDemuxThread *dt, qreal t)
            : demux_thread(dt)
            , pts(t)
        {}
        void run() {
            AVThread *avt = demux_thread->videoThread();
            avt->packetQueue()->clear(); // clear here
            if (pts <= 0) {
                demux_thread->demuxer->seek(qint64(-pts*1000.0) - 1000LL);
                QVector<qreal> ts;
                qreal t = -1.0;
                while (t < -pts) {
                    demux_thread->demuxer->readFrame();
                    if (demux_thread->demuxer->stream() != demux_thread->demuxer->videoStream())
                        continue;
                    t = demux_thread->demuxer->packet().pts;
                    ts.push_back(t);
                }
                ts.pop_back();
                pts = ts.back();
                // FIXME: sometimes can not seek to the previous pts, the result pts is always current pts
            }
            qDebug("step backward: %lld, %f", qint64(pts*1000.0), pts);
            demux_thread->video_thread->setDropFrameOnSeek(false);
            demux_thread->seekInternal(qint64(pts*1000.0), AccurateSeek);
        }
    private:
        AVDemuxThread *demux_thread;
        qreal pts;
    };

    pause(true);
    t->packetQueue()->clear(); // will put new packets before task run
    t->packetQueue();
    Packet pkt;
    pkt.pts = pre_pts;
    t->packetQueue()->put(pkt); // clear and put a seek packet to ensure not frames other than previous frame will be decoded and rendered
    video_thread->pause(false);
    newSeekRequest(new stepBackwardTask(this, pre_pts));
}
Exemplo n.º 2
0
 virtual void call() {
     if (!mDemuxThread)
         return;
     if (mDemuxThread->isEnd())
         return;
     mDemuxThread->updateBufferState(); // ensure detect buffering immediately
     AVThread *thread = mDemuxThread->videoThread();
     //qDebug("try wake up video queue");
     if (thread)
         thread->packetQueue()->blockFull(false);
     //qDebug("try wake up audio queue");
     thread = mDemuxThread->audioThread();
     if (thread)
         thread->packetQueue()->blockFull(false);
 }
Exemplo n.º 3
0
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);
}
Exemplo n.º 4
0
 void run() {
     AVThread *avt = demux_thread->videoThread();
     avt->packetQueue()->clear(); // clear here
     if (pts <= 0) {
         demux_thread->demuxer->seek(qint64(-pts*1000.0) - 500LL);
         QVector<qreal> ts;
         qreal t = -1.0;
         while (t < -pts) {
             demux_thread->demuxer->readFrame();
             if (demux_thread->demuxer->stream() != demux_thread->demuxer->videoStream())
                 continue;
             t = demux_thread->demuxer->packet().pts;
             ts.push_back(t);
         }
         const qreal t0 = ts.back();
         ts.pop_back();
         const qreal dt = t0 - ts.back();
         pts = ts.back();
         // FIXME: sometimes can not seek to the previous pts, the result pts is always current pts, so let the target pts a little earlier
         pts -= dt/2.0;
     }
     qDebug("step backward: %lld, %f", qint64(pts*1000.0), pts);
     demux_thread->video_thread->setDropFrameOnSeek(false);
     demux_thread->seekInternal(qint64(pts*1000.0), AccurateSeek);
 }
Exemplo n.º 5
0
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);
    }
}
Exemplo n.º 6
0
//No more data to put. So stop blocking the queue to take the reset elements
void AVDemuxThread::stop()
{
    //this will not affect the pause state if we pause the output
    //TODO: why remove blockFull(false) can not play another file?
    AVThread* av[] = { audio_thread, video_thread};
    for (size_t i = 0; i < sizeof(av)/sizeof(av[0]); ++i) {
        AVThread* t = av[i];
        if (!t)
            continue;
        t->packetQueue()->clear();
        t->packetQueue()->blockFull(false); //??
        while (t->isRunning()) {
            qDebug() << "stopping thread " << t;
            t->stop();
            t->wait(500);
        }
    }
    pause(false);
    cond.wakeAll();
    qDebug("all avthread finished. try to exit demux thread<<<<<<");
    end = true;
}
Exemplo n.º 7
0
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);
}