+
+void
+GLVideoView::start ()
+{
+ _thread = new boost::thread (boost::bind(&GLVideoView::thread, this));
+}
+
+void
+GLVideoView::stop ()
+{
+ if (_thread) {
+ _thread->interrupt ();
+ _thread->join ();
+ }
+ delete _thread;
+ _thread = 0;
+}
+
+bool
+GLVideoView::one_shot () const
+{
+ boost::mutex::scoped_lock lm (_one_shot_mutex);
+ return _one_shot;
+}
+
+void
+GLVideoView::set_one_shot (bool s)
+{
+ boost::mutex::scoped_lock lm (_one_shot_mutex);
+ _one_shot = s;
+}
+
+void
+GLVideoView::thread ()
+try
+{
+ /* XXX_b: check all calls and signal emissions in this method & protect them if necessary */
+ {
+ boost::mutex::scoped_lock lm (_context_mutex);
+ _context = new wxGLContext (_canvas);
+ _canvas->SetCurrent (*_context);
+ }
+
+ while (true) {
+ if (!film() && !one_shot()) {
+ /* XXX: this should be an indefinite wait until
+ one of our conditions becomes true.
+ */
+ dcpomatic_sleep_milliseconds (40);
+ continue;
+ }
+
+ set_one_shot (false);
+
+ dcpomatic::DCPTime const next = position() + one_video_frame();
+
+ if (next >= film()->length()) {
+ _viewer->stop ();
+ _viewer->emit_finished ();
+ continue;
+ }
+
+ get_next_frame (false);
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+ set_image (_player_video.first->image(bind(&PlayerVideo::force, _1, AV_PIX_FMT_RGB24), false, true));
+ }
+ draw ();
+
+ while (time_until_next_frame() < 5) {
+ get_next_frame (true);
+ }
+
+ boost::this_thread::interruption_point ();
+ dcpomatic_sleep_milliseconds (time_until_next_frame());
+ }
+
+ {
+ boost::mutex::scoped_lock lm (_context_mutex);
+ delete _context;
+ }
+}
+catch (boost::thread_interrupted& e)
+{
+ /* XXX_b: store exceptions here */
+ delete _context;
+ return;
+}
+
+wxGLContext *
+GLVideoView::context () const
+{
+ boost::mutex::scoped_lock lm (_context_mutex);
+ return _context;
+}
+
+bool
+GLVideoView::display_next_frame (bool non_blocking)
+{
+ bool const g = get_next_frame (non_blocking);
+ set_one_shot (true);
+ return g;
+}
+
+dcpomatic::DCPTime
+GLVideoView::one_video_frame () const
+{
+ return dcpomatic::DCPTime::from_frames (1, film()->video_frame_rate());
+}
+
+