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/*
Copyright (C) 2012-2021 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/>.
*/
#ifndef DCPOMATIC_J2K_ENCODER_H
#define DCPOMATIC_J2K_ENCODER_H
/** @file src/j2k_encoder.h
* @brief J2KEncoder class.
*/
#include "util.h"
#include "cross.h"
#include "event_history.h"
#include "exception_store.h"
#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 J2KEncoder
* @brief Class to manage encoding to J2K.
*
* This class keeps a queue of frames to be encoded and distributes
* the work around threads and encoding servers.
*/
class J2KEncoder : public ExceptionStore, public std::enable_shared_from_this<J2KEncoder>
{
public:
J2KEncoder (std::shared_ptr<const Film> film, std::shared_ptr<Writer> writer);
~J2KEncoder ();
J2KEncoder (J2KEncoder const&) = delete;
J2KEncoder& operator= (J2KEncoder const&) = delete;
/** Called to indicate that a processing run is about to begin */
void begin ();
/** Called to pass a bit of video to be encoded as the next DCP frame */
void encode (std::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
/** Called when a processing run has finished */
void end ();
boost::optional<float> current_encoding_rate () const;
int video_frames_enqueued () const;
void servers_list_changed ();
private:
static void call_servers_list_changed (std::weak_ptr<J2KEncoder> encoder);
void frame_done ();
void encoder_thread (boost::optional<EncodeServerDescription>);
void terminate_threads ();
/** Film that we are encoding */
std::shared_ptr<const Film> _film;
EventHistory _history;
boost::mutex _threads_mutex;
std::shared_ptr<boost::thread_group> _threads;
mutable boost::mutex _queue_mutex;
std::list<std::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;
std::shared_ptr<Writer> _writer;
Waker _waker;
std::shared_ptr<PlayerVideo> _last_player_video[static_cast<int>(Eyes::COUNT)];
boost::optional<dcpomatic::DCPTime> _last_player_video_time;
boost::signals2::scoped_connection _server_found_connection;
};
#endif
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