X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fvideo_decoder.cc;h=2bd8d6f5170e0c0e824af35b1d236e674538efe6;hb=2517ec798da291dedc02dd7a7a432f7aa63133e4;hp=aedc1a13f0b80f09dfde79af245b7a41ff813911;hpb=80bf0bfaaaf705beffc728c182c394fdc87e479e;p=dcpomatic.git diff --git a/src/lib/video_decoder.cc b/src/lib/video_decoder.cc index aedc1a13f..2bd8d6f51 100644 --- a/src/lib/video_decoder.cc +++ b/src/lib/video_decoder.cc @@ -37,318 +37,68 @@ using boost::shared_ptr; using boost::optional; VideoDecoder::VideoDecoder (Decoder* parent, shared_ptr c, shared_ptr 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 -VideoDecoder::decoded (Frame frame) -{ - list 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 -VideoDecoder::get (Frame frame, bool accurate) -{ - if (_no_data_frame && frame >= _no_data_frame.get()) { - return list (); - } - - /* 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.index() || frame > (_decoded.back().frame.index() + 1)) { - _parent->seek (ContentTime::from_frames (frame, _content->active_video_frame_rate()), accurate); - } - - unsigned int const frames_wanted = _content->video->frame_type() == VIDEO_FRAME_TYPE_2D ? 1 : 2; - - list 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::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()) { - _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) +/** 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_one_eye (Frame from, Frame to, Eyes eye) +VideoDecoder::emit (shared_ptr image, Frame frame) { - if (to == 0) { - /* Already OK */ + if (ignore ()) { return; } - /* Fill with black... */ - shared_ptr 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 filler_left_image (new RawImageProxy (_black_image)); - shared_ptr 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::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) { + 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: + 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; } - } - - while (from != to) { - -#ifdef DCPOMATIC_DEBUG - test_gaps++; -#endif - - _decoded.push_back ( - ContentVideo ( - from.eyes() == EYES_LEFT ? filler_left_image : filler_right_image, - from, - from.eyes() == EYES_LEFT ? filler_left_part : filler_right_part - ) - ); - - ++from; - } -} - -/** Called by decoder classes when they have a video frame ready */ -void -VideoDecoder::give (shared_ptr 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 to_push; - switch (_content->video->frame_type ()) { - case VIDEO_FRAME_TYPE_2D: - to_push.push_back (ContentVideo (image, VideoFrame (frame, EYES_BOTH), PART_WHOLE)); - break; - case VIDEO_FRAME_TYPE_3D: - 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.index()); - to_push.push_back (ContentVideo (image, VideoFrame (frame, same ? EYES_RIGHT : EYES_LEFT), PART_WHOLE)); - break; - } - case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT: - to_push.push_back (ContentVideo (image, VideoFrame (frame, EYES_LEFT), PART_LEFT_HALF)); - to_push.push_back (ContentVideo (image, VideoFrame (frame, EYES_RIGHT), PART_RIGHT_HALF)); - break; - case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM: - to_push.push_back (ContentVideo (image, VideoFrame (frame, EYES_LEFT), PART_TOP_HALF)); - to_push.push_back (ContentVideo (image, VideoFrame (frame, EYES_RIGHT), PART_BOTTOM_HALF)); - break; - case VIDEO_FRAME_TYPE_3D_LEFT: - to_push.push_back (ContentVideo (image, VideoFrame (frame, EYES_LEFT), PART_WHOLE)); - break; - case VIDEO_FRAME_TYPE_3D_RIGHT: - to_push.push_back (ContentVideo (image, VideoFrame (frame, EYES_RIGHT), PART_WHOLE)); - 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 from; - - if (_decoded.empty() && _last_seek_time && _last_seek_accurate) { - from = VideoFrame ( - _last_seek_time->frames_round (_content->active_video_frame_rate ()), - _content->video->frame_type() == VIDEO_FRAME_TYPE_2D ? EYES_BOTH : EYES_LEFT - ); - } else if (!_decoded.empty ()) { - from = _decoded.back().frame; - ++(*from); - } - - /* 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 && (*from) > to_push.front().frame) { - return; - } - - int const max_decoded_size = 96; - - /* If _decoded is already `full' there is no point in adding anything more to it, - as the new stuff will just be removed again. - */ - if (_decoded.size() < max_decoded_size) { - if (from) { - switch (_content->video->frame_type ()) { - case VIDEO_FRAME_TYPE_2D: - fill_one_eye (from->index(), to_push.front().frame.index(), EYES_BOTH); - break; - case VIDEO_FRAME_TYPE_3D: - case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT: - case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM: - case VIDEO_FRAME_TYPE_3D_ALTERNATE: - fill_both_eyes (from.get(), to_push.front().frame); - break; - case VIDEO_FRAME_TYPE_3D_LEFT: - fill_one_eye (from->index(), to_push.front().frame.index(), EYES_LEFT); - break; - case VIDEO_FRAME_TYPE_3D_RIGHT: - fill_one_eye (from->index(), to_push.front().frame.index(), EYES_RIGHT); - 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); } - 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() > max_decoded_size) { - _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 ()); }