X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fvideo_decoder.cc;h=2850b5aa031a939700bad58ff6a0e7ee2b15b614;hb=1befa3d286a5016e897f1a23cc60cd3d3b96e63a;hp=6a16557cdc65e8aac476eeb290a1f5b3c48d8c32;hpb=dc87445987c00b85a44b6372e43894067fae44b3;p=dcpomatic.git diff --git a/src/lib/video_decoder.cc b/src/lib/video_decoder.cc index 6a16557cd..2850b5aa0 100644 --- a/src/lib/video_decoder.cc +++ b/src/lib/video_decoder.cc @@ -1,59 +1,171 @@ /* - Copyright (C) 2012 Carl Hetherington + Copyright (C) 2012-2020 Carl Hetherington - 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 . */ #include "video_decoder.h" #include "image.h" +#include "raw_image_proxy.h" +#include "film.h" +#include "log.h" +#include "frame_interval_checker.h" +#include "compose.hpp" +#include +#include #include "i18n.h" using std::cout; +using std::list; +using std::max; +using std::back_inserter; using boost::shared_ptr; using boost::optional; +using namespace dcpomatic; -VideoDecoder::VideoDecoder (shared_ptr f, shared_ptr c) - : Decoder (f) - , _video_content (c) +VideoDecoder::VideoDecoder (Decoder* parent, shared_ptr c) + : DecoderPart (parent) + , _content (c) + , _frame_interval_checker (new FrameIntervalChecker()) { } -/** Called by subclasses when they have a video frame ready */ +/** 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::video (shared_ptr image, bool same, ContentTime time) +VideoDecoder::emit (shared_ptr film, shared_ptr image, Frame decoder_frame) { - switch (_video_content->video_frame_type ()) { + if (ignore ()) { + return; + } + + double const afr = _content->active_video_frame_rate(film); + VideoFrameType const vft = _content->video->frame_type(); + + ContentTime frame_time = ContentTime::from_frames (decoder_frame, afr); + + /* Do some heuristics to try and spot the case where the user sets content to 3D + * when it is not. We try to tell this by looking at the differences in time between + * the first few frames. Real 3D content should have two frames for each timestamp. + */ + if (_frame_interval_checker) { + _frame_interval_checker->feed (frame_time, afr); + if (_frame_interval_checker->guess() == FrameIntervalChecker::PROBABLY_NOT_3D && vft == VIDEO_FRAME_TYPE_3D) { + boost::throw_exception ( + DecodeError( + String::compose( + _("The content file %1 is set as 3D but does not appear to contain 3D images. Please set it to 2D. " + "You can still make a 3D DCP from this content by ticking the 3D option in the DCP video tab."), + _content->path(0) + ) + ) + ); + } + + if (_frame_interval_checker->guess() != FrameIntervalChecker::AGAIN) { + _frame_interval_checker.reset (); + } + } + + Frame frame; + Eyes eyes = EYES_BOTH; + if (!_position) { + /* This is the first data we have received since initialisation or seek. Set + the position based on the frame that was given. After this first time + we just cound frames, since (as with audio) it seems that ContentTimes + are unreliable from FFmpegDecoder. They are much better than audio times + but still we get the occasional one which is duplicated. In this case + ffmpeg seems to carry on regardless, processing the video frame as normal. + If we drop the frame with the duplicated timestamp we obviously lose sync. + */ + _position = ContentTime::from_frames (decoder_frame, afr); + if (vft == VIDEO_FRAME_TYPE_3D_ALTERNATE) { + frame = decoder_frame / 2; + _last_emitted_eyes = EYES_RIGHT; + } else { + frame = decoder_frame; + } + } else { + if (vft == VIDEO_FRAME_TYPE_3D || vft == VIDEO_FRAME_TYPE_3D_ALTERNATE) { + DCPOMATIC_ASSERT (_last_emitted_eyes); + if (_last_emitted_eyes.get() == EYES_RIGHT) { + frame = _position->frames_round(afr) + 1; + eyes = EYES_LEFT; + } else { + frame = _position->frames_round(afr); + eyes = EYES_RIGHT; + } + } else { + frame = _position->frames_round(afr) + 1; + } + } + + switch (vft) { case VIDEO_FRAME_TYPE_2D: - _pending.push_back (shared_ptr (new DecodedVideo (image, EYES_BOTH, same, time))); + Data (ContentVideo (image, frame, EYES_BOTH, PART_WHOLE)); break; - case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT: + case VIDEO_FRAME_TYPE_3D: { - int const half = image->size().width / 2; - _pending.push_back (shared_ptr (new DecodedVideo (image->crop (Crop (0, half, 0, 0), true), EYES_LEFT, same, time))); - _pending.push_back (shared_ptr (new DecodedVideo (image->crop (Crop (half, 0, 0, 0), true), EYES_RIGHT, same, time))); + Data (ContentVideo (image, frame, eyes, PART_WHOLE)); + _last_emitted_frame = frame; + _last_emitted_eyes = eyes; break; } - case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM: + case VIDEO_FRAME_TYPE_3D_ALTERNATE: { - int const half = image->size().height / 2; - _pending.push_back (shared_ptr (new DecodedVideo (image->crop (Crop (0, 0, 0, half), true), EYES_LEFT, same, time))); - _pending.push_back (shared_ptr (new DecodedVideo (image->crop (Crop (0, 0, half, 0), true), EYES_RIGHT, same, time))); + Data (ContentVideo (image, frame, eyes, PART_WHOLE)); + _last_emitted_eyes = eyes; 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, afr); +} + +void +VideoDecoder::seek () +{ + _position = boost::none; + _last_emitted_frame.reset (); + _last_emitted_eyes.reset (); + _frame_interval_checker.reset (new FrameIntervalChecker()); }