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/*
Copyright (C) 2012-2013 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.
*/
/** @file src/decoder.h
* @brief Parent class for decoders of content.
*/
#ifndef DCPOMATIC_DECODER_H
#define DCPOMATIC_DECODER_H
#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>
#include <boost/utility.hpp>
#include "types.h"
class Film;
class Decoded;
/** @class Decoder.
* @brief Parent class for decoders of content.
*/
class Decoder : public boost::noncopyable
{
public:
Decoder (boost::shared_ptr<const Film>);
virtual ~Decoder () {}
/** Seek so that the next get_*() will yield the next thing
* (video/sound frame, subtitle etc.) at or after the requested
* time. Pass accurate = true to try harder to get close to
* the request.
*/
virtual void seek (ContentTime time, bool accurate);
boost::shared_ptr<Decoded> peek ();
void consume ();
protected:
/** Perform one decode pass of the content, which may or may not
* result in a complete quantum (Decoded object) of decoded stuff
* being made ready.
* @return true if the decoder is done (i.e. no more data will be
* produced by any future calls to pass() without a seek() first).
*/
virtual bool pass () = 0;
virtual void flush () {};
/** The Film that we are decoding in */
boost::weak_ptr<const Film> _film;
std::list<boost::shared_ptr<Decoded> > _pending;
bool _done;
};
#endif
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