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/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
This program 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,
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.
*/
#ifndef DCPOMATIC_VIDEO_DECODER_H
#define DCPOMATIC_VIDEO_DECODER_H
#include <boost/signals2.hpp>
#include <boost/shared_ptr.hpp>
#include "decoder.h"
#include "video_content.h"
#include "util.h"
class VideoContent;
class Image;
class VideoDecoder : public virtual Decoder
{
public:
VideoDecoder (boost::shared_ptr<const Film>, boost::shared_ptr<const VideoContent>);
/** Seek so that the next pass() will yield (approximately) the requested frame.
* Pass accurate = true to try harder to get close to the request.
*/
virtual void seek (VideoContent::Frame frame, bool accurate) = 0;
/** Emitted when a video frame is ready.
* First parameter is the video image.
* Second parameter is the eye(s) which should see this image.
* Third parameter is true if the image is the same as the last one that was emitted for this Eyes value.
* Fourth parameter is the frame within our source.
*/
boost::signals2::signal<void (boost::shared_ptr<const Image>, Eyes, bool, VideoContent::Frame)> Video;
protected:
void video (boost::shared_ptr<const Image>, bool, VideoContent::Frame);
boost::shared_ptr<const VideoContent> _video_content;
VideoContent::Frame _video_position;
};
#endif
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