void stream_title_changed(const std::string &);
void stream_duration_changed(const Msp::Time::TimeDelta &);
void stream_position_changed(const Msp::Time::TimeDelta &);
void stream_title_changed(const std::string &);
void stream_duration_changed(const Msp::Time::TimeDelta &);
void stream_position_changed(const Msp::Time::TimeDelta &);