#include <wx/wx.h>
#include "lib/film.h"
-#include "lib/decoder_factory.h"
class wxToggleButton;
class FFmpegPlayer;
class Image;
+class RGBPlusAlphaImage;
class Subtitle;
/** @class FilmViewer
* @brief A wx widget to view a preview of a Film.
+ *
+ * The film takes the following path through the viewer:
+ *
+ * 1. get_frame() asks our _player to decode some data. If it does, process_video()
+ * will be called.
+ *
+ * 2. process_video() takes the image and subtitle from the decoder (_raw_frame and _raw_sub)
+ * and calls raw_to_display().
+ *
+ * 3. raw_to_display() copies _raw_frame to _display_frame, processing it and scaling it.
+ *
+ * 4. calling _panel->Refresh() and _panel->Update() results in paint_panel() being called;
+ * this creates frame_bitmap from _display_frame and blits it to the display. It also
+ * blits the subtitle, if required.
+ *
+ * update_from_decoder() asks the player to re-emit its current frame on the next pass(), and then
+ * starts from step #1.
+ *
+ * update_from_raw() starts at step #3, then calls _panel->Refresh and _panel->Update.
*/
class FilmViewer : public wxPanel
{
private:
void film_changed (Film::Property);
+ void film_content_changed (boost::weak_ptr<Content>, int);
void paint_panel (wxPaintEvent &);
void panel_sized (wxSizeEvent &);
- void slider_moved (wxCommandEvent &);
+ void slider_moved (wxScrollEvent &);
void play_clicked (wxCommandEvent &);
void timer (wxTimerEvent &);
- void process_video (boost::shared_ptr<Image>, boost::shared_ptr<Subtitle>);
+ void process_video (boost::shared_ptr<const Image>, bool, boost::shared_ptr<Subtitle>, double);
void calculate_sizes ();
void check_play_state ();
+ void update_from_raw ();
+ void update_from_decoder ();
+ void raw_to_display ();
+ void get_frame ();
+ void active_jobs_changed (bool);
+ void back_clicked (wxCommandEvent &);
+ void forward_clicked (wxCommandEvent &);
boost::shared_ptr<Film> _film;
-
+ boost::shared_ptr<Player> _player;
+
+ wxSizer* _v_sizer;
wxPanel* _panel;
wxSlider* _slider;
+ wxButton* _back_button;
+ wxButton* _forward_button;
+ wxStaticText* _frame;
+ wxStaticText* _timecode;
wxToggleButton* _play_button;
wxTimer _timer;
- Decoders _decoders;
- boost::shared_ptr<Image> _raw;
- boost::shared_ptr<Image> _display;
+ boost::shared_ptr<const Image> _raw_frame;
+ boost::shared_ptr<Subtitle> _raw_sub;
+ boost::shared_ptr<const Image> _display_frame;
+ /* The x offset at which we display the actual film content; this corresponds
+ to the film's padding converted to our coordinates.
+ */
+ int _display_frame_x;
+ boost::shared_ptr<RGBPlusAlphaImage> _display_sub;
+ Position _display_sub_position;
+ bool _got_frame;
- int _out_width;
- int _out_height;
- int _panel_width;
- int _panel_height;
+ /** Size of our output (including padding if we have any) */
+ libdcp::Size _out_size;
+ /** Size that we will make our film (equal to _out_size unless we have padding) */
+ libdcp::Size _film_size;
+ /** Size of the panel that we have available */
+ libdcp::Size _panel_size;
};