/*
Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ This file is part of DCP-o-matic.
+
+ DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
using boost::optional;
VideoDecoder::VideoDecoder (Decoder* parent, shared_ptr<const Content> c, shared_ptr<Log> log)
-#ifdef DCPOMATIC_DEBUG
- : test_gaps (0)
- , _parent (parent),
- _content (c)
-#else
- : _parent (parent)
+ : DecoderPart (parent, log)
, _content (c)
-#endif
- , _log (log)
- , _last_seek_accurate (true)
- , _ignore (false)
-{
- _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 == 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> ();
- }
-
- /* At this stage, if we have get_video()ed before, _decoded will contain the last frame that this
- method returned (and possibly a few more). If the requested frame is not in _decoded and it is not the next
- one after the end of _decoded we need to seek.
- */
-
- _log->log (String::compose ("VD has request for %1", frame), LogEntry::TYPE_DEBUG_DECODE);
-
- if (_decoded.empty() || frame < _decoded.front().frame || frame > (_decoded.back().frame + 1)) {
- seek (ContentTime::from_frames (frame, _content->active_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.
- */
- bool no_data = false;
-
- while (true) {
- if (!decoded(frame).empty ()) {
- /* 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 > 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 will do: use the first one that comes out of pass() */
- while (_decoded.empty() && !_parent->pass (Decoder::PASS_REASON_VIDEO, accurate)) {}
- if (!_decoded.empty ()) {
- dec.push_back (_decoded.front ());
- }
- }
-
- /* 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 < dec.front().frame) {
- _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, eye, filler_part, i)
- );
- }
}
-/** Fill _decoded from `from' up to, but not including, `to'
- * adding both left and right eye frames.
+/** Called by decoder classes when they have a video frame ready.
+ * @param frame Frame index within the content; this does not take into account 3D
+ * so for 3D_ALTERNATE this value goes:
+ * 0: frame 0 left
+ * 1: frame 0 right
+ * 2: frame 1 left
+ * 3: frame 1 right
+ * and so on.
*/
void
-VideoDecoder::fill_both_eyes (Frame from, Frame to, Eyes eye)
-{
- if (to == 0 && eye == EYES_LEFT) {
- /* Already OK */
- return;
- }
-
- /* 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->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.empty() ? EYES_LEFT : _decoded.back().eyes;
-
- if (_decoded.empty ()) {
- filler_frame = 0;
- filler_eye = EYES_LEFT;
- } else if (_decoded.back().eyes == EYES_LEFT) {
- filler_frame = _decoded.back().frame;
- filler_eye = EYES_RIGHT;
- } else if (_decoded.back().eyes == EYES_RIGHT) {
- filler_frame = _decoded.back().frame + 1;
- filler_eye = EYES_LEFT;
- }
-
- while (filler_frame != to || filler_eye != eye) {
-
-#ifdef DCPOMATIC_DEBUG
- test_gaps++;
-#endif
-
- _decoded.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 decoder classes when they have a video frame ready */
-void
-VideoDecoder::give (shared_ptr<const ImageProxy> image, Frame frame)
+VideoDecoder::emit (shared_ptr<const ImageProxy> image, Frame frame)
{
- if (_ignore) {
- return;
- }
-
- _log->log (String::compose ("VD receives %1", frame), LogEntry::TYPE_DEBUG_DECODE);
-
- /* Work out what we are going to push into _decoded next */
- list<ContentVideo> to_push;
- switch (_content->video->frame_type ()) {
- case VIDEO_FRAME_TYPE_2D:
- to_push.push_back (ContentVideo (image, EYES_BOTH, PART_WHOLE, frame));
- break;
- case VIDEO_FRAME_TYPE_3D_ALTERNATE:
- {
- /* We receive the same frame index twice for 3D-alternate; hence we know which
- frame this one is.
- */
- bool const same = (!_decoded.empty() && frame == _decoded.back().frame);
- to_push.push_back (ContentVideo (image, same ? EYES_RIGHT : EYES_LEFT, PART_WHOLE, frame));
- break;
- }
- case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT:
- to_push.push_back (ContentVideo (image, EYES_LEFT, PART_LEFT_HALF, frame));
- to_push.push_back (ContentVideo (image, EYES_RIGHT, PART_RIGHT_HALF, frame));
- break;
- case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM:
- to_push.push_back (ContentVideo (image, EYES_LEFT, PART_TOP_HALF, frame));
- to_push.push_back (ContentVideo (image, EYES_RIGHT, PART_BOTTOM_HALF, frame));
- break;
- case VIDEO_FRAME_TYPE_3D_LEFT:
- to_push.push_back (ContentVideo (image, EYES_LEFT, PART_WHOLE, frame));
- break;
- case VIDEO_FRAME_TYPE_3D_RIGHT:
- to_push.push_back (ContentVideo (image, EYES_RIGHT, PART_WHOLE, frame));
- break;
- default:
- DCPOMATIC_ASSERT (false);
- }
-
- /* Now VideoDecoder is required never to have gaps in the frames that it presents
- via get_video(). Hence we need to fill in any gap between the last thing in _decoded
- and the things we are about to push.
- */
-
- optional<Frame> from;
- optional<Frame> to;
-
- if (_decoded.empty() && _last_seek_time && _last_seek_accurate) {
- from = _last_seek_time->frames_round (_content->active_video_frame_rate ());
- to = to_push.front().frame;
- } else if (!_decoded.empty ()) {
- from = _decoded.back().frame + 1;
- to = to_push.front().frame;
- }
-
- /* If we've pre-rolled on a seek we may now receive out-of-order frames
- (frames before the last seek time) which we can just ignore.
- */
-
- if (from && to && from.get() > to.get()) {
+ if (ignore ()) {
return;
}
- if (from) {
+ FrameRateChange const frc = _content->film()->active_frame_rate_change (_content->position());
+ for (int i = 0; i < frc.repeat; ++i) {
switch (_content->video->frame_type ()) {
case VIDEO_FRAME_TYPE_2D:
- fill_one_eye (from.get(), to.get (), EYES_BOTH);
+ 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:
- case VIDEO_FRAME_TYPE_3D_ALTERNATE:
- fill_both_eyes (from.get(), to.get(), to_push.front().eyes);
+ 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:
- fill_one_eye (from.get(), to.get (), EYES_LEFT);
+ Data (ContentVideo (image, frame, EYES_LEFT, PART_WHOLE));
break;
case VIDEO_FRAME_TYPE_3D_RIGHT:
- fill_one_eye (from.get(), to.get (), EYES_RIGHT);
+ Data (ContentVideo (image, frame, EYES_RIGHT, PART_WHOLE));
break;
+ default:
+ DCPOMATIC_ASSERT (false);
}
- }
- copy (to_push.begin(), to_push.end(), back_inserter (_decoded));
-
- /* We can't let this build up too much or we will run out of memory. There is a
- `best' value for the allowed size of _decoded which balances memory use
- with decoding efficiency (lack of seeks). Throwing away video frames here
- is not a problem for correctness, so do it.
- */
- while (_decoded.size() > 96) {
- _decoded.pop_back ();
+ ++frame;
}
-}
-void
-VideoDecoder::seek (ContentTime s, bool accurate)
-{
- _decoded.clear ();
- _last_seek_time = s;
- _last_seek_accurate = accurate;
-}
-
-/** Set this decoder never to produce any data */
-void
-VideoDecoder::set_ignore ()
-{
- _ignore = true;
+ _position = ContentTime::from_frames (frame, _content->active_video_frame_rate ());
}
projects / dcpomatic.git / blobdiff