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 DVDOMATIC_ENCODER_H
21 #define DVDOMATIC_ENCODER_H
23 /** @file src/encoder.h
24 * @brief Parent class for classes which can encode video and audio frames.
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>
37 #ifdef HAVE_SWRESAMPLE
39 #include <libswresample/swresample.h>
44 #include "video_sink.h"
45 #include "audio_sink.h"
51 class ServerDescription;
55 * @brief Encoder to J2K and WAV for DCP.
57 * Video is supplied to process_video as YUV frames, and audio
58 * is supplied as uncompressed PCM in blocks of various sizes.
61 class Encoder : public VideoSink, public AudioSink
64 Encoder (boost::shared_ptr<const Film> f);
67 /** Called to indicate that a processing run is about to begin */
68 virtual void process_begin ();
70 /** Call with a frame of video.
71 * @param i Video frame image.
72 * @param same true if i is the same as the last time we were called.
73 * @param s A subtitle that should be on this frame, or 0.
75 void process_video (boost::shared_ptr<Image> i, bool same, boost::shared_ptr<Subtitle> s);
77 /** Call with some audio data */
78 void process_audio (boost::shared_ptr<AudioBuffers>);
80 /** Called when a processing run has finished */
81 virtual void process_end ();
83 float current_frames_per_second () const;
84 bool skipping () const;
85 int video_frames_out () const;
90 void frame_skipped ();
92 void close_sound_files ();
93 void write_audio (boost::shared_ptr<const AudioBuffers> audio);
95 void encoder_thread (ServerDescription *);
96 void terminate_worker_threads ();
97 void link (std::string, std::string) const;
99 /** Film that we are encoding */
100 boost::shared_ptr<const Film> _film;
102 /** Mutex for _time_history, _just_skipped and _last_frame */
103 mutable boost::mutex _history_mutex;
104 /** List of the times of completion of the last _history_size frames;
105 first is the most recently completed.
107 std::list<struct timeval> _time_history;
108 /** Number of frames that we should keep history for */
109 static int const _history_size;
110 /** true if the last frame we processed was skipped (because it was already done) */
113 /** Number of video frames received so far */
114 SourceFrame _video_frames_in;
115 /** Number of audio frames received so far */
116 int64_t _audio_frames_in;
117 /** Number of video frames written for the DCP so far */
118 int _video_frames_out;
119 /** Number of audio frames written for the DCP so far */
120 int64_t _audio_frames_out;
123 SwrContext* _swr_context;
126 /** List of links that we need to create when all frames have been processed;
127 * such that we need to call link (first, second) for each member of this list.
128 * In other words, `first' is a `real' frame and `second' should be a link to `first'.
129 * Frames are DCP frames.
131 std::list<std::pair<int, int> > _links_required;
133 std::vector<SNDFILE*> _sound_files;
135 boost::optional<int> _last_real_frame;
137 std::list<boost::shared_ptr<DCPVideoFrame> > _queue;
138 std::list<boost::thread *> _worker_threads;
139 mutable boost::mutex _worker_mutex;
140 boost::condition _worker_condition;