+ std::shared_ptr<AudioAnalysis> _analysis;
+ std::weak_ptr<Film> _film;
+ std::weak_ptr<FilmViewer> _viewer;
+ /** content to analyse, or 0 to analyse all the film's content */
+ std::weak_ptr<Content> _content;
+ int _channels;
+ std::shared_ptr<const Playlist> _playlist;
+ wxStaticText* _cursor;