- _black_image.reset (new Image (AV_PIX_FMT_RGB24, _content->video->size(), true));
- _black_image->make_black ();
-}
-
-list<ContentVideo>
-VideoDecoder::decoded (Frame frame)
-{
- list<ContentVideo> output;
-
- BOOST_FOREACH (ContentVideo const & i, _decoded) {
- if (i.frame.index() == frame) {
- output.push_back (i);
- }
- }
-
- return output;
-}
-
-/** Get all frames which exist in the content at a given frame index.
- * @param frame Frame index.
- * @param accurate true to try hard to return frames at the precise time that was requested, otherwise frames nearby may be returned.
- * @return Frames; there may be none (if there is no video there), 1 for 2D or 2 for 3D.
- */
-list<ContentVideo>
-VideoDecoder::get (Frame frame, bool accurate)
-{
- if (_no_data_frame && frame >= _no_data_frame.get()) {
- return list<ContentVideo> ();
- }
-
- _log->log (String::compose ("VD has request for %1", frame), LogEntry::TYPE_DEBUG_DECODE);
-
- /* See if we have frame, and suggest a seek if not */
-
- list<ContentVideo>::const_iterator i = _decoded.begin ();
- while (i != _decoded.end() && i->frame.index() != frame) {
- _log->log (String::compose ("VD has stored %1 which is no good", i->frame.index()), LogEntry::TYPE_DEBUG_DECODE);
- ++i;
- }
-
- if (i == _decoded.end()) {
- Frame seek_frame = frame;
- if (_content->video->frame_type() == VIDEO_FRAME_TYPE_3D_ALTERNATE) {
- /* 3D alternate is a special case as the frame index in the content is not the same
- as the frame index we are talking about here.
- */
- seek_frame *= 2;
- }
- _log->log (String::compose ("VD suggests seek to %1", seek_frame), LogEntry::TYPE_DEBUG_DECODE);
- maybe_seek (ContentTime::from_frames (seek_frame, _content->active_video_frame_rate()), accurate);
- }
-
- /* Work out the number of frames that we should return; we
- must return all frames in our content at the requested `time'
- (i.e. frame)
- */
- unsigned int frames_wanted = 0;
- switch (_content->video->frame_type()) {
- case VIDEO_FRAME_TYPE_2D:
- case VIDEO_FRAME_TYPE_3D_LEFT:
- case VIDEO_FRAME_TYPE_3D_RIGHT:
- frames_wanted = 1;
- break;
- case VIDEO_FRAME_TYPE_3D:
- case VIDEO_FRAME_TYPE_3D_ALTERNATE:
- case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT:
- case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM:
- frames_wanted = 2;
- break;
- default:
- DCPOMATIC_ASSERT (false);
- }
-
- 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.
- */
- bool no_data = false;
-
- while (true) {
- if (decoded(frame).size() == frames_wanted) {
- /* We got what we want */
- break;
- }
-
- if (_parent->pass (Decoder::PASS_REASON_VIDEO, accurate)) {
- /* The decoder has nothing more for us */
- no_data = true;
- break;
- }
-
- if (!_decoded.empty() && _decoded.front().frame.index() > 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 (frame);
-
- if (no_data && dec.empty()) {
- _no_data_frame = frame;
- }
-
- } else {
- /* Any frame(s) will do: use the first one(s) that comes out of pass() */
- while (_decoded.size() < frames_wanted && !_parent->pass (Decoder::PASS_REASON_VIDEO, accurate)) {}
- list<ContentVideo>::const_iterator i = _decoded.begin();
- unsigned int j = 0;
- while (i != _decoded.end() && j < frames_wanted) {
- dec.push_back (*i);
- ++i;
- ++j;
- }
- }
-
- /* Clean up _decoded; keep the frame we are returning, if any (which may have two images
- for 3D), but nothing before that
- */
- while (!_decoded.empty() && !dec.empty() && _decoded.front().frame.index() < dec.front().frame.index()) {
- _log->log (String::compose ("VD discards %1", _decoded.front().frame.index()), LogEntry::TYPE_DEBUG_DECODE);
- _decoded.pop_front ();
- }
-
- return dec;
-}
-
-/** Fill _decoded from `from' up to, but not including, `to' with
- * a frame for one particular Eyes value (which could be EYES_BOTH,
- * EYES_LEFT or EYES_RIGHT)
- */
-void
-VideoDecoder::fill_one_eye (Frame from, Frame to, Eyes eye)
-{
- if (to == 0) {
- /* Already OK */
- return;
- }
-
- /* Fill with black... */
- 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.empty ()) {
- filler_image = _decoded.back().image;
- filler_part = _decoded.back().part;
- }
-
- for (Frame i = from; i < to; ++i) {
-#ifdef DCPOMATIC_DEBUG
- test_gaps++;
-#endif
- _decoded.push_back (
- ContentVideo (filler_image, VideoFrame (i, eye), filler_part)
- );
- }
-}
-
-/** Fill _decoded from `from' up to, but not including, `to'
- * adding both left and right eye frames.
- */
-void
-VideoDecoder::fill_both_eyes (VideoFrame from, VideoFrame to)
-{
- /* Fill with black... */
- shared_ptr<const ImageProxy> filler_left_image (new RawImageProxy (_black_image));
- 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.rbegin(); i != _decoded.rend(); ++i) {
- if (i->frame.eyes() == EYES_LEFT && !filler_left_image) {
- filler_left_image = i->image;
- filler_left_part = i->part;
- } else if (i->frame.eyes() == EYES_RIGHT && !filler_right_image) {
- filler_right_image = i->image;
- filler_right_part = i->part;
- }
-
- if (filler_left_image && filler_right_image) {
- break;
- }
- }
-
- while (from != to) {
-
-#ifdef DCPOMATIC_DEBUG
- test_gaps++;
-#endif