boost::shared_ptr<VideoContent> video;
boost::shared_ptr<AudioContent> audio;
- boost::shared_ptr<CaptionContent> caption;
+ std::list<boost::shared_ptr<CaptionContent> > caption;
+
+ boost::shared_ptr<CaptionContent> only_caption () const;
+ boost::shared_ptr<CaptionContent> caption_of_original_type (CaptionType type) const;
void signal_changed (int);