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/*
Copyright (C) 2012-2015 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_ENCODER_H
#define DCPOMATIC_ENCODER_H
/** @file src/encoder.h
* @brief Encoder class.
*/
#include "util.h"
#include "cross.h"
#include "exception_store.h"
#include <boost/shared_ptr.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/condition.hpp>
#include <boost/thread.hpp>
#include <boost/optional.hpp>
#include <boost/signals2.hpp>
#include <list>
#include <stdint.h>
class Film;
class EncodeServerDescription;
class DCPVideo;
class Writer;
class Job;
class PlayerVideo;
/** @class Encoder
* @brief Class to manage encoding to JPEG2000.
*
* This class keeps a queue of frames to be encoded and distributes
* the work around threads and encoding servers.
*/
class Encoder : public boost::noncopyable, public ExceptionStore
{
public:
Encoder (boost::shared_ptr<const Film>, boost::shared_ptr<Writer>);
virtual ~Encoder ();
/** Called to indicate that a processing run is about to begin */
void begin ();
/** Called to pass in zero or more bits of video to be encoded
* as the next DCP frame.
*/
void encode (std::list<boost::shared_ptr<PlayerVideo> > f);
/** Called when a processing run has finished */
void end ();
float current_encoding_rate () const;
int video_frames_out () const;
private:
void enqueue (boost::shared_ptr<PlayerVideo> f);
void frame_done ();
void encoder_thread (boost::optional<EncodeServerDescription>);
void terminate_threads ();
void servers_list_changed ();
/** Film that we are encoding */
boost::shared_ptr<const Film> _film;
/** Mutex for _time_history and _video_frames_enqueued */
mutable boost::mutex _state_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;
/** Current DCP frame index */
Frame _position;
/* XXX: probably should be atomic */
bool _terminate_enqueue;
bool _terminate_encoding;
/** Mutex for _threads */
mutable boost::mutex _threads_mutex;
std::list<boost::thread *> _threads;
mutable boost::mutex _queue_mutex;
std::list<boost::shared_ptr<DCPVideo> > _queue;
/** condition to manage thread wakeups when we have nothing to do */
boost::condition _empty_condition;
/** condition to manage thread wakeups when we have too much to do */
boost::condition _full_condition;
boost::shared_ptr<Writer> _writer;
Waker _waker;
boost::shared_ptr<PlayerVideo> _last_player_video;
boost::signals2::scoped_connection _server_found_connection;
};
#endif
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