2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef DCPOMATIC_ENCODER_H
21 #define DCPOMATIC_ENCODER_H
23 /** @file src/encoder.h
24 * @brief Encoder to J2K and WAV for DCP.
27 #include <boost/shared_ptr.hpp>
28 #include <boost/thread/mutex.hpp>
29 #include <boost/thread/condition.hpp>
30 #include <boost/thread.hpp>
31 #include <boost/optional.hpp>
35 #include <libavutil/samplefmt.h>
36 #include <libswresample/swresample.h>
39 #include "video_sink.h"
40 #include "audio_sink.h"
46 class ServerDescription;
53 * @brief Encoder to J2K and WAV for DCP.
55 * Video is supplied to process_video as YUV frames, and audio
56 * is supplied as uncompressed PCM in blocks of various sizes.
59 class Encoder : public VideoSink, public AudioSink
62 Encoder (boost::shared_ptr<Film> f, boost::shared_ptr<Job>);
65 /** Called to indicate that a processing run is about to begin */
66 void process_begin ();
68 /** Call with a frame of video.
69 * @param i Video frame image.
70 * @param same true if i is the same as the last time we were called.
71 * @param s A subtitle that should be on this frame, or 0.
73 void process_video (boost::shared_ptr<const Image> i, bool same, boost::shared_ptr<Subtitle> s, Time);
75 /** Call with some audio data */
76 void process_audio (boost::shared_ptr<const AudioBuffers>, Time);
78 /** Called when a processing run has finished */
81 float current_encoding_rate () const;
82 int video_frames_out () const;
88 void encoder_thread (ServerDescription *);
89 void terminate_threads ();
91 /** Film that we are encoding */
92 boost::shared_ptr<Film> _film;
93 boost::shared_ptr<Job> _job;
95 /** Mutex for _time_history and _last_frame */
96 mutable boost::mutex _history_mutex;
97 /** List of the times of completion of the last _history_size frames;
98 first is the most recently completed.
100 std::list<struct timeval> _time_history;
101 /** Number of frames that we should keep history for */
102 static int const _history_size;
104 /** Number of video frames written for the DCP so far */
105 int _video_frames_out;
107 bool _have_a_real_frame;
109 std::list<boost::shared_ptr<DCPVideoFrame> > _queue;
110 std::list<boost::thread *> _threads;
111 mutable boost::mutex _mutex;
112 boost::condition _condition;
114 boost::shared_ptr<Writer> _writer;