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/*
Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
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.
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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file src/decoder.h
* @brief Decoder class.
*/
#ifndef DCPOMATIC_DECODER_H
#define DCPOMATIC_DECODER_H
#include "types.h"
#include "dcpomatic_time.h"
#include <boost/utility.hpp>
class Decoded;
class VideoDecoder;
class AudioDecoder;
class SubtitleDecoder;
/** @class Decoder.
* @brief Parent class for decoders of content.
*/
class Decoder : public boost::noncopyable
{
public:
virtual ~Decoder () {}
boost::shared_ptr<VideoDecoder> video;
boost::shared_ptr<AudioDecoder> audio;
boost::shared_ptr<SubtitleDecoder> subtitle;
enum PassReason {
PASS_REASON_VIDEO,
PASS_REASON_AUDIO,
PASS_REASON_SUBTITLE
};
/** Seek so that the next pass() will yield the next thing
* (video/sound frame, subtitle etc.) at or after the requested
* time. Pass accurate = true to try harder to ensure that, at worst,
* the next thing we yield comes before `time'. This may entail
* seeking some way before `time' to be on the safe side.
* Alternatively, if seeking is 100% accurate for this decoder,
* it may seek to just the right spot.
*/
virtual void seek (ContentTime time, bool accurate) = 0;
/** @return true if this decoder has already returned all its data and will give no more */
virtual bool pass (PassReason, bool accurate) = 0;
/** Ensure that any future get() calls return data that reflect
* changes in our content's settings.
*/
virtual void reset () {}
};
#endif
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