bool VideoDecoder::seekToFrame(uint frame) {
if (!isSeekable())
return false;
VideoTrack *track = 0;
for (TrackList::iterator it = _tracks.begin(); it != _tracks.end(); it++) {
if ((*it)->getTrackType() == Track::kTrackTypeVideo) {
// We only allow seeking by frame when one video track
// is present
if (track)
return false;
track = (VideoTrack *)*it;
}
}
// If we didn't find a video track, we can't seek by frame (of course)
if (!track)
return false;
Audio::Timestamp time = track->getFrameTime(frame);
if (time < 0)
return false;
return seek(time);
}
bool VideoDecoder::seek(const Audio::Timestamp &time) {
if (!isSeekable())
return false;
// Stop all tracks so they can be seeked
if (isPlaying())
stopAudio();
// Do the actual seeking
if (!seekIntern(time))
return false;
// Seek any external track too
for (TrackListIterator it = _externalTracks.begin(); it != _externalTracks.end(); it++)
if (!(*it)->seek(time))
return false;
_lastTimeChange = time;
// Now that we've seeked, start all tracks again
// Also reset our start time
if (isPlaying()) {
startAudio();
_startTime = g_system->getMillis() - (time.msecs() / _playbackRate).toInt();
}
resetPauseStartTime();
findNextVideoTrack();
_needsUpdate = true;
return true;
}
bool VideoDecoder::seek(const Audio::Timestamp &time) {
if (!isSeekable())
return false;
// Stop all tracks so they can be seeked
if (isPlaying())
stopAudio();
for (TrackList::iterator it = _tracks.begin(); it != _tracks.end(); it++)
if (!(*it)->seek(time))
return false;
_lastTimeChange = time;
// Now that we've seeked, start all tracks again
// Also reset our start time
if (isPlaying()) {
startAudio();
_startTime = g_system->getMillis() - time.msecs();
}
resetPauseStartTime();
_needsUpdate = true;
return true;
}
bool Controller::enableJack(bool enable)
{
if (!m_consumer)
return true;
if (enable && !m_jackFilter) {
m_jackFilter = new Mlt::Filter(profile(), "jackrack");
if (m_jackFilter->is_valid()) {
m_consumer->attach(*m_jackFilter);
m_consumer->set("audio_off", 1);
if (isSeekable()) {
m_jackFilter->listen("jack-started", this, (mlt_listener) on_jack_started);
m_jackFilter->listen("jack-stopped", this, (mlt_listener) on_jack_stopped);
}
}
else {
delete m_jackFilter;
m_jackFilter = 0;
return false;
}
}
else if (!enable && m_jackFilter) {
m_consumer->detach(*m_jackFilter);
delete m_jackFilter;
m_jackFilter = 0;
m_consumer->set("audio_off", 0);
m_consumer->stop();
m_consumer->start();
}
return true;
}
bool VideoDecoder::Track::isRewindable() const {
return isSeekable();
}
bool Controller::isSeekableClip()
{
return isClip() && isSeekable();
}