X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fvideo_decoder.cc;h=0b97e5e8771561b2bf470c78ff0901369ab75c5e;hb=7c730205e50014347bd96ab9735346d0b5922798;hp=5dd078553659b21d3c09bcf8a030ea77e73ad783;hpb=5dc2dbdb6639f8d617a40209ad603d2a38f9df2a;p=dcpomatic.git diff --git a/src/lib/video_decoder.cc b/src/lib/video_decoder.cc index 5dd078553..0b97e5e87 100644 --- a/src/lib/video_decoder.cc +++ b/src/lib/video_decoder.cc @@ -1,180 +1,124 @@ /* - Copyright (C) 2012-2014 Carl Hetherington + Copyright (C) 2012-2018 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 "content_video.h" +#include "raw_image_proxy.h" +#include "film.h" +#include "log.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 c) -#ifdef DCPOMATIC_DEBUG - : test_gaps (0) - , _video_content (c) -#else - : _video_content (c) -#endif - , _same (false) -{ - -} - -list -VideoDecoder::decoded_video (VideoFrame frame) +VideoDecoder::VideoDecoder (Decoder* parent, shared_ptr c) + : DecoderPart (parent) + , _content (c) { - list output; - - for (list::const_iterator i = _decoded_video.begin(); i != _decoded_video.end(); ++i) { - 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. +/** 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. */ -list -VideoDecoder::get_video (VideoFrame 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 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, but nothing before that */ - while (!_decoded_video.empty() && _decoded_video.front().frame < dec.front().frame) { - _decoded_video.pop_front (); - } - - return dec; -} - - -/** Called by subclasses when they have a video frame ready */ void -VideoDecoder::video (shared_ptr image, VideoFrame frame) +VideoDecoder::emit (shared_ptr film, shared_ptr image, Frame frame) { - /* We may receive the same frame index twice for 3D, and we need to know - when that happens. - */ - _same = (!_decoded_video.empty() && frame == _decoded_video.back().frame); - - /* Fill in gaps */ - /* XXX: 3D */ - - while (!_decoded_video.empty () && (_decoded_video.back().frame + 1) < frame) { -#ifdef DCPOMATIC_DEBUG - test_gaps++; -#endif - _decoded_video.push_back ( - ContentVideo ( - _decoded_video.back().image, - _decoded_video.back().eyes, - _decoded_video.back().part, - _decoded_video.back().frame + 1 - ) - ); + if (ignore ()) { + return; } - - switch (_video_content->video_frame_type ()) { + + switch (_content->video->frame_type ()) { case VIDEO_FRAME_TYPE_2D: - _decoded_video.push_back (ContentVideo (image, EYES_BOTH, PART_WHOLE, frame)); + Data (ContentVideo (image, frame, EYES_BOTH, PART_WHOLE)); + break; + case VIDEO_FRAME_TYPE_3D: + { + /* We should receive the same frame index twice for 3D; hence we know which + frame this one is. + */ + bool const same = (_last_emitted_frame && _last_emitted_frame.get() == frame); + if (!same && _last_emitted_eyes && *_last_emitted_eyes == EYES_LEFT) { + /* We just got a new frame index but the last frame was left-eye; it looks like + this content is not really 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) + ) + ) + ); + } + Eyes const eyes = same ? EYES_RIGHT : EYES_LEFT; + Data (ContentVideo (image, frame, eyes, PART_WHOLE)); + _last_emitted_frame = frame; + _last_emitted_eyes = eyes; break; + } case VIDEO_FRAME_TYPE_3D_ALTERNATE: - _decoded_video.push_back (ContentVideo (image, _same ? EYES_RIGHT : EYES_LEFT, PART_WHOLE, frame)); + Data (ContentVideo (image, frame / 2, (frame % 2) ? EYES_RIGHT : EYES_LEFT, PART_WHOLE)); + frame /= 2; break; case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT: - _decoded_video.push_back (ContentVideo (image, EYES_LEFT, PART_LEFT_HALF, frame)); - _decoded_video.push_back (ContentVideo (image, EYES_RIGHT, PART_RIGHT_HALF, frame)); + 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: - _decoded_video.push_back (ContentVideo (image, EYES_LEFT, PART_TOP_HALF, frame)); - _decoded_video.push_back (ContentVideo (image, EYES_RIGHT, PART_BOTTOM_HALF, frame)); + 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: - _decoded_video.push_back (ContentVideo (image, EYES_LEFT, PART_WHOLE, frame)); + Data (ContentVideo (image, frame, EYES_LEFT, PART_WHOLE)); break; case VIDEO_FRAME_TYPE_3D_RIGHT: - _decoded_video.push_back (ContentVideo (image, EYES_RIGHT, PART_WHOLE, frame)); + Data (ContentVideo (image, frame, EYES_RIGHT, PART_WHOLE)); break; default: - assert (false); + DCPOMATIC_ASSERT (false); } + + _position = ContentTime::from_frames (frame, _content->active_video_frame_rate(film)); } void -VideoDecoder::seek (ContentTime, bool) +VideoDecoder::seek () { - _decoded_video.clear (); + _position = ContentTime(); + _last_emitted_frame.reset (); + _last_emitted_eyes.reset (); } -