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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.
*/
/** @file src/decoder.h
* @brief Parent class for decoders of content.
*/
#ifndef DVDOMATIC_DECODER_H
#define DVDOMATIC_DECODER_H
#include <vector>
#include <string>
#include <stdint.h>
#include <boost/shared_ptr.hpp>
#include <boost/signals2.hpp>
#include "util.h"
#include "stream.h"
#include "video_source.h"
#include "audio_source.h"
class Job;
class Options;
class Image;
class Log;
class DelayLine;
class TimedSubtitle;
class Subtitle;
class Film;
class FilterGraph;
/** @class Decoder.
* @brief Parent class for decoders of content.
*
* These classes can be instructed run through their content
* (by calling ::go), and they emit signals when video or audio data is ready for something else
* to process.
*/
class Decoder : public VideoSource, public AudioSource
{
public:
Decoder (boost::shared_ptr<Film>, boost::shared_ptr<const Options>, Job *);
virtual ~Decoder () {}
/* Methods to query our input video */
/** @return video frames per second, or 0 if unknown */
virtual float frames_per_second () const = 0;
/** @return native size in pixels */
virtual Size native_size () const = 0;
virtual int time_base_numerator () const = 0;
virtual int time_base_denominator () const = 0;
virtual int sample_aspect_ratio_numerator () const = 0;
virtual int sample_aspect_ratio_denominator () const = 0;
virtual bool pass () = 0;
void go ();
SourceFrame video_frame () const {
return _video_frame;
}
virtual void set_audio_stream (boost::optional<AudioStream>);
virtual void set_subtitle_stream (boost::optional<SubtitleStream>);
boost::optional<AudioStream> audio_stream () const {
return _audio_stream;
}
boost::optional<SubtitleStream> subtitle_stream () const {
return _subtitle_stream;
}
std::vector<AudioStream> audio_streams () const {
return _audio_streams;
}
std::vector<SubtitleStream> subtitle_streams () const {
return _subtitle_streams;
}
protected:
virtual PixelFormat pixel_format () const = 0;
void emit_video (boost::shared_ptr<Image>);
void emit_subtitle (boost::shared_ptr<TimedSubtitle>);
void repeat_last_video ();
/** our Film */
boost::shared_ptr<Film> _film;
/** our options */
boost::shared_ptr<const Options> _opt;
/** associated Job, or 0 */
Job* _job;
boost::optional<AudioStream> _audio_stream;
boost::optional<SubtitleStream> _subtitle_stream;
std::vector<AudioStream> _audio_streams;
std::vector<SubtitleStream> _subtitle_streams;
private:
void signal_video (boost::shared_ptr<Image>, boost::shared_ptr<Subtitle>);
SourceFrame _video_frame;
boost::shared_ptr<TimedSubtitle> _timed_subtitle;
boost::shared_ptr<Image> _last_image;
boost::shared_ptr<Subtitle> _last_subtitle;
};
#endif
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