+ if (ignore ()) {
+ return;
+ }
+
+ switch (_content->video->frame_type ()) {
+ case VIDEO_FRAME_TYPE_2D:
+ Data (ContentVideo (image, frame, EYES_BOTH, PART_WHOLE));
+ break;
+ case VIDEO_FRAME_TYPE_3D:
+ {
+ /* We receive the same frame index twice for 3D; hence we know which
+ frame this one is.
+ */
+ bool const same = (_last_emitted && _last_emitted.get() == frame);
+ Data (ContentVideo (image, frame, same ? EYES_RIGHT : EYES_LEFT, PART_WHOLE));
+ _last_emitted = frame;
+ break;
+ }
+ case VIDEO_FRAME_TYPE_3D_ALTERNATE:
+ Data (ContentVideo (image, frame / 2, (frame % 2) ? EYES_RIGHT : EYES_LEFT, PART_WHOLE));
+ frame /= 2;
+ break;
+ case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT:
+ Data (ContentVideo (image, frame, EYES_LEFT, PART_LEFT_HALF));
+ Data (ContentVideo (image, frame, EYES_RIGHT, PART_RIGHT_HALF));
+ break;
+ case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM:
+ Data (ContentVideo (image, frame, EYES_LEFT, PART_TOP_HALF));
+ Data (ContentVideo (image, frame, EYES_RIGHT, PART_BOTTOM_HALF));
+ break;
+ case VIDEO_FRAME_TYPE_3D_LEFT:
+ Data (ContentVideo (image, frame, EYES_LEFT, PART_WHOLE));
+ break;
+ case VIDEO_FRAME_TYPE_3D_RIGHT:
+ Data (ContentVideo (image, frame, EYES_RIGHT, PART_WHOLE));
+ break;
+ default:
+ DCPOMATIC_ASSERT (false);
+ }
+
+ _position = ContentTime::from_frames (frame, _content->active_video_frame_rate ());