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;
56 class MonoPictureAsset;
57 class MonoPictureAssetWriter;
61 * @brief Encoder to J2K and WAV for DCP.
63 * Video is supplied to process_video as YUV frames, and audio
64 * is supplied as uncompressed PCM in blocks of various sizes.
67 class Encoder : public VideoSink, public AudioSink
70 Encoder (boost::shared_ptr<const Film> f);
73 /** Called to indicate that a processing run is about to begin */
74 virtual void process_begin ();
76 /** Call with a frame of video.
77 * @param i Video frame image.
78 * @param same true if i is the same as the last time we were called.
79 * @param s A subtitle that should be on this frame, or 0.
81 void process_video (boost::shared_ptr<Image> i, bool same, boost::shared_ptr<Subtitle> s);
83 /** Call with some audio data */
84 void process_audio (boost::shared_ptr<AudioBuffers>);
86 /** Called when a processing run has finished */
87 virtual void process_end ();
89 float current_frames_per_second () const;
90 bool skipping () const;
91 int video_frames_out () const;
96 void frame_skipped ();
98 void close_sound_files ();
99 void write_audio (boost::shared_ptr<const AudioBuffers> audio);
101 void encoder_thread (ServerDescription *);
102 void terminate_worker_threads ();
103 void link (std::string, std::string) const;
105 /** Film that we are encoding */
106 boost::shared_ptr<const Film> _film;
108 /** Mutex for _time_history, _just_skipped and _last_frame */
109 mutable boost::mutex _history_mutex;
110 /** List of the times of completion of the last _history_size frames;
111 first is the most recently completed.
113 std::list<struct timeval> _time_history;
114 /** Number of frames that we should keep history for */
115 static int const _history_size;
116 /** true if the last frame we processed was skipped (because it was already done) */
119 /** Number of video frames received so far */
120 SourceFrame _video_frames_in;
121 /** Number of audio frames received so far */
122 int64_t _audio_frames_in;
123 /** Number of video frames written for the DCP so far */
124 int _video_frames_out;
125 /** Number of audio frames written for the DCP so far */
126 int64_t _audio_frames_out;
128 void writer_thread ();
129 void finish_writer_thread ();
132 SwrContext* _swr_context;
135 std::vector<SNDFILE*> _sound_files;
137 bool _have_a_real_frame;
138 bool _terminate_encoder;
139 std::list<boost::shared_ptr<DCPVideoFrame> > _encode_queue;
140 std::list<boost::thread *> _worker_threads;
141 mutable boost::mutex _worker_mutex;
142 boost::condition _worker_condition;
144 boost::thread* _writer_thread;
146 std::list<std::pair<boost::shared_ptr<EncodedData>, int> > _write_queue;
147 mutable boost::mutex _writer_mutex;
148 boost::condition _writer_condition;
149 boost::shared_ptr<EncodedData> _last_written;
150 std::list<int> _pending;
151 int _last_written_frame;
152 static const unsigned int _maximum_frames_in_memory;
154 boost::shared_ptr<libdcp::MonoPictureAsset> _picture_asset;
155 boost::shared_ptr<libdcp::MonoPictureAssetWriter> _picture_asset_writer;