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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 DVDOMATIC_ENCODER_H
#define DVDOMATIC_ENCODER_H
/** @file src/encoder.h
* @brief Parent class for classes which can encode video and audio frames.
*/
#include <boost/shared_ptr.hpp>
#include <boost/thread/mutex.hpp>
#include <list>
#include <stdint.h>
extern "C" {
#include <libavutil/samplefmt.h>
}
class Options;
class Image;
class Subtitle;
class AudioBuffers;
class Film;
/** @class Encoder
* @brief Parent class for classes which can encode video and audio frames.
*
* Video is supplied to process_video as YUV frames, and audio
* is supplied as uncompressed PCM in blocks of various sizes.
*
* The subclass is expected to encode the video and/or audio in
* some way and write it to disk.
*/
class Encoder
{
public:
Encoder (boost::shared_ptr<const Film> f, boost::shared_ptr<const Options> o);
/** Called to indicate that a processing run is about to begin */
virtual void process_begin (int64_t audio_channel_layout) = 0;
/** Called with a frame of video.
* @param i Video frame image.
* @param f Frame number within the film.
* @param s A subtitle that should be on this frame, or 0.
*/
virtual void process_video (boost::shared_ptr<Image> i, int f, boost::shared_ptr<Subtitle> s) = 0;
/** Called with some audio data.
* @param d Array of pointers to floating point sample data for each channel.
* @param s Number of frames (ie number of samples in each channel)
*/
virtual void process_audio (boost::shared_ptr<const AudioBuffers>) = 0;
/** Called when a processing run has finished */
virtual void process_end () = 0;
float current_frames_per_second () const;
bool skipping () const;
int last_frame () const;
protected:
void frame_done (int n);
void frame_skipped ();
/** Film that we are encoding */
boost::shared_ptr<const Film> _film;
/** Options */
boost::shared_ptr<const Options> _opt;
/** Mutex for _time_history, _just_skipped and _last_frame */
mutable boost::mutex _history_mutex;
/** List of the times of completion of the last _history_size frames;
first is the most recently completed.
*/
std::list<struct timeval> _time_history;
/** Number of frames that we should keep history for */
static int const _history_size;
/** true if the last frame we processed was skipped (because it was already done) */
bool _just_skipped;
/** Index of the last frame to be processed */
int _last_frame;
};
#endif
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