-list<ContentVideo>
-VideoDecoder::get_video (Frame frame, bool accurate)
-{
- /* At this stage, if we have get_video()ed before, _decoded_video will contain the last frame that this
- method returned (and possibly a few more). If the requested frame is not in _decoded_video and it is not the next
- one after the end of _decoded_video we need to seek.
- */
-
- if (_decoded_video.empty() || frame < _decoded_video.front().frame || frame > (_decoded_video.back().frame + 1)) {
- seek (ContentTime::from_frames (frame, _video_content->video_frame_rate()), accurate);
- }
-
- list<ContentVideo> dec;
-
- /* Now enough pass() calls should either:
- * (a) give us what we want, or
- * (b) give us something after what we want, indicating that we will never get what we want, or
- * (c) hit the end of the decoder.
- */
- if (accurate) {
- /* We are being accurate, so we want the right frame.
- * This could all be one statement but it's split up for clarity.
- */
- while (true) {
- if (!decoded_video(frame).empty ()) {
- /* We got what we want */
- break;
- }
-
- if (pass ()) {
- /* The decoder has nothing more for us */
- break;
- }
-
- if (!_decoded_video.empty() && _decoded_video.front().frame > frame) {
- /* We're never going to get the frame we want. Perhaps the caller is asking
- * for a video frame before the content's video starts (if its audio
- * begins before its video, for example).
- */
- break;
- }
- }
-
- dec = decoded_video (frame);
- } else {
- /* Any frame will do: use the first one that comes out of pass() */
- while (_decoded_video.empty() && !pass ()) {}
- if (!_decoded_video.empty ()) {
- dec.push_back (_decoded_video.front ());
- }
- }
-
- /* Clean up _decoded_video; keep the frame we are returning (which may have two images
- for 3D), but nothing before that */
- while (!_decoded_video.empty() && _decoded_video.front().frame < dec.front().frame) {
- _decoded_video.pop_front ();
- }
-
- return dec;
-}
-
-/** Fill _decoded_video from `from' up to, but not including, `to' */
-void
-VideoDecoder::fill_2d (Frame from, Frame to)
-{
- if (to == 0) {
- /* Already OK */
- return;
- }
-
- /* Fill with black... */
- boost::shared_ptr<const ImageProxy> filler_image (new RawImageProxy (_black_image));
- Part filler_part = PART_WHOLE;
-
- /* ...unless there's some video we can fill with */
- if (!_decoded_video.empty ()) {
- filler_image = _decoded_video.back().image;
- filler_part = _decoded_video.back().part;
- }
-
- for (Frame i = from; i < to; ++i) {
-#ifdef DCPOMATIC_DEBUG
- test_gaps++;
-#endif
- _decoded_video.push_back (
- ContentVideo (filler_image, EYES_BOTH, filler_part, i)
- );
- }
-}
-
-/** Fill _decoded_video from `from' up to, but not including, `to' */
-void
-VideoDecoder::fill_3d (Frame from, Frame to, Eyes eye)
-{
- if (to == 0 && eye == EYES_LEFT) {
- /* Already OK */
- return;
- }
-
- /* Fill with black... */
- boost::shared_ptr<const ImageProxy> filler_left_image (new RawImageProxy (_black_image));
- boost::shared_ptr<const ImageProxy> filler_right_image (new RawImageProxy (_black_image));
- Part filler_left_part = PART_WHOLE;
- Part filler_right_part = PART_WHOLE;
-
- /* ...unless there's some video we can fill with */
- for (list<ContentVideo>::const_reverse_iterator i = _decoded_video.rbegin(); i != _decoded_video.rend(); ++i) {
- if (i->eyes == EYES_LEFT && !filler_left_image) {
- filler_left_image = i->image;
- filler_left_part = i->part;
- } else if (i->eyes == EYES_RIGHT && !filler_right_image) {
- filler_right_image = i->image;
- filler_right_part = i->part;
- }
-
- if (filler_left_image && filler_right_image) {
- break;
- }
- }
-
- Frame filler_frame = from;
- Eyes filler_eye = _decoded_video.empty() ? EYES_LEFT : _decoded_video.back().eyes;
-
- if (_decoded_video.empty ()) {
- filler_frame = 0;
- filler_eye = EYES_LEFT;
- } else if (_decoded_video.back().eyes == EYES_LEFT) {
- filler_frame = _decoded_video.back().frame;
- filler_eye = EYES_RIGHT;
- } else if (_decoded_video.back().eyes == EYES_RIGHT) {
- filler_frame = _decoded_video.back().frame + 1;
- filler_eye = EYES_LEFT;
- }
-
- while (filler_frame != to || filler_eye != eye) {
-
-#ifdef DCPOMATIC_DEBUG
- test_gaps++;
-#endif
-
- _decoded_video.push_back (
- ContentVideo (
- filler_eye == EYES_LEFT ? filler_left_image : filler_right_image,
- filler_eye,
- filler_eye == EYES_LEFT ? filler_left_part : filler_right_part,
- filler_frame
- )
- );
-
- if (filler_eye == EYES_LEFT) {
- filler_eye = EYES_RIGHT;
- } else {
- filler_eye = EYES_LEFT;
- ++filler_frame;
- }
- }
-}
-
-/** Called by subclasses when they have a video frame ready */