2 Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef DCPOMATIC_J2K_ENCODER_H
23 #define DCPOMATIC_J2K_ENCODER_H
26 /** @file src/j2k_encoder.h
27 * @brief J2KEncoder class.
31 #include "grok/context.h"
33 #include "enum_indexed_vector.h"
34 #include "event_history.h"
35 #include "exception_store.h"
37 #include <boost/optional.hpp>
38 #include <boost/signals2.hpp>
39 #include <boost/thread.hpp>
40 #include <boost/thread/condition.hpp>
41 #include <boost/thread/mutex.hpp>
47 class EncodeServerDescription;
54 * @brief Class to manage encoding to J2K.
56 * This class keeps a queue of frames to be encoded and distributes
57 * the work around threads and encoding servers.
59 class J2KEncoder : public ExceptionStore
62 J2KEncoder(std::shared_ptr<const Film> film, Writer& writer);
65 J2KEncoder (J2KEncoder const&) = delete;
66 J2KEncoder& operator= (J2KEncoder const&) = delete;
68 /** Called to indicate that a processing run is about to begin */
71 /** Called to pass a bit of video to be encoded as the next DCP frame */
72 void encode (std::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
77 /** Called when a processing run has finished */
80 boost::optional<float> current_encoding_rate () const;
81 int video_frames_enqueued () const;
83 void servers_list_changed ();
89 void encoder_thread (boost::optional<EncodeServerDescription>);
90 void terminate_threads ();
92 /** Film that we are encoding */
93 std::shared_ptr<const Film> _film;
95 EventHistory _history;
97 boost::mutex _threads_mutex;
98 std::shared_ptr<boost::thread_group> _threads;
100 mutable boost::mutex _queue_mutex;
101 std::list<DCPVideo> _queue;
102 /** condition to manage thread wakeups when we have nothing to do */
103 boost::condition _empty_condition;
104 /** condition to manage thread wakeups when we have too much to do */
105 boost::condition _full_condition;
110 EnumIndexedVector<std::shared_ptr<PlayerVideo>, Eyes> _last_player_video;
111 boost::optional<dcpomatic::DCPTime> _last_player_video_time;
113 boost::signals2::scoped_connection _server_found_connection;
115 grk_plugin::DcpomaticContext _dcpomatic_context;
116 grk_plugin::GrokContext *_context;