2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef DCPOMATIC_VIDEO_DECODER_H
21 #define DCPOMATIC_VIDEO_DECODER_H
23 #include <boost/signals2.hpp>
24 #include <boost/shared_ptr.hpp>
26 #include "video_content.h"
32 class VideoDecoder : public virtual Decoder
35 VideoDecoder (boost::shared_ptr<const Film>, boost::shared_ptr<const VideoContent>);
37 /** Seek so that the next pass() will yield (approximately) the requested frame.
38 * Pass accurate = true to try harder to get close to the request.
40 virtual void seek (VideoContent::Frame frame, bool accurate) = 0;
42 /** Emitted when a video frame is ready.
43 * First parameter is the video image.
44 * Second parameter is the eye(s) which should see this image.
45 * Third parameter is true if the image is the same as the last one that was emitted for this Eyes value.
46 * Fourth parameter is the frame within our source.
48 boost::signals2::signal<void (boost::shared_ptr<const Image>, Eyes, bool, VideoContent::Frame)> Video;
52 void video (boost::shared_ptr<const Image>, bool, VideoContent::Frame);
53 boost::shared_ptr<const VideoContent> _video_content;
54 VideoContent::Frame _video_position;