Merge master; fix crash on new film.

[dcpomatic.git] / src / wx / film_viewer.h

diff --git a/src/wx/film_viewer.h b/src/wx/film_viewer.h
index a78c772a49858570f9dd0170e6cf8dd5a752460c..02d862ca0c42472dd8cefb6de594b116725e6a68 100644 (file)
--- a/src/wx/film_viewer.h
+++ b/src/wx/film_viewer.h
@@ -23,7 +23,6 @@
 
 #include <wx/wx.h>
 #include "lib/film.h"
-#include "lib/decoder_factory.h"
 
 class wxToggleButton;
 class FFmpegPlayer;
@@ -33,6 +32,25 @@ 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
 {
@@ -43,16 +61,17 @@ public:
 
 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 (wxScrollEvent &);
        void play_clicked (wxCommandEvent &);
        void timer (wxTimerEvent &);
-       void process_video (boost::shared_ptr<Image>, bool, boost::shared_ptr<Subtitle>, double);
+       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 decoder_changed ();
+       void update_from_decoder ();
        void raw_to_display ();
        void get_frame ();
        void active_jobs_changed (bool);
@@ -60,6 +79,7 @@ private:
        void forward_clicked (wxCommandEvent &);
 
        boost::shared_ptr<Film> _film;
+       boost::shared_ptr<Player> _player;
 
        wxSizer* _v_sizer;
        wxPanel* _panel;
@@ -71,10 +91,9 @@ private:
        wxToggleButton* _play_button;
        wxTimer _timer;
 
-       Decoders _decoders;
-       boost::shared_ptr<Image> _raw_frame;
+       boost::shared_ptr<const Image> _raw_frame;
        boost::shared_ptr<Subtitle> _raw_sub;
-       boost::shared_ptr<Image> _display_frame;
+       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.
        */