boost::signals2::signal<void ()> PositionChanged;
boost::signals2::signal<void (DCPTime)> Started;
boost::signals2::signal<void (DCPTime)> Stopped;
+ boost::signals2::signal<void (DCPTime)> Seeked;
boost::signals2::signal<void ()> FilmChanged;
boost::signals2::signal<bool ()> PlaybackPermitted;