2 Copyright (C) 2012-2015 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 /** @file src/lib/writer.h
21 * @brief Writer class.
25 #include "player_subtitles.h"
26 #include "exception_store.h"
27 #include <boost/shared_ptr.hpp>
28 #include <boost/weak_ptr.hpp>
29 #include <boost/thread.hpp>
30 #include <boost/thread/condition.hpp>
41 class ReferencedReelAsset;
52 /** a normal frame with some JPEG200 data */
54 /** a frame whose data already exists in the MXF,
55 and we fake-write it; i.e. we update the writer's
56 state but we use the data that is already on disk.
62 /** encoded data for FULL */
63 boost::optional<dcp::Data> encoded;
64 /** size of data for FAKE */
68 /** frame index within the reel */
70 /** eyes for FULL, FAKE and REPEAT */
74 bool operator< (QueueItem const & a, QueueItem const & b);
75 bool operator== (QueueItem const & a, QueueItem const & b);
78 * @brief Class to manage writing JPEG2000 and audio data to assets on disk.
80 * This class creates sound and picture assets, then takes Data
81 * or AudioBuffers objects (containing image or sound data respectively)
82 * and writes them to the assets.
84 * ::write() for Data (picture) can be called out of order, and the Writer
85 * will sort it out. write() for AudioBuffers must be called in order.
88 class Writer : public ExceptionStore, public boost::noncopyable
91 Writer (boost::shared_ptr<const Film>, boost::weak_ptr<Job>);
96 bool can_fake_write (Frame) const;
98 void write (dcp::Data, Frame, Eyes);
99 void fake_write (Frame, Eyes);
100 bool can_repeat (Frame) const;
101 void repeat (Frame, Eyes);
102 void write (boost::shared_ptr<const AudioBuffers>);
103 void write (PlayerSubtitles subs);
104 void write (std::list<boost::shared_ptr<Font> > fonts);
105 void write (ReferencedReelAsset asset);
108 void set_encoder_threads (int threads);
112 void terminate_thread (bool);
113 bool have_sequenced_image_at_queue_head ();
114 size_t video_reel (int frame) const;
117 boost::shared_ptr<const Film> _film;
118 boost::weak_ptr<Job> _job;
119 std::vector<ReelWriter> _reels;
120 std::vector<ReelWriter>::iterator _audio_reel;
121 std::vector<ReelWriter>::iterator _subtitle_reel;
123 /** our thread, or 0 */
124 boost::thread* _thread;
125 /** true if our thread should finish */
127 /** queue of things to write to disk */
128 std::list<QueueItem> _queue;
129 /** number of FULL frames whose JPEG200 data is currently held in RAM */
130 int _queued_full_in_memory;
131 /** mutex for thread state */
132 mutable boost::mutex _state_mutex;
133 /** condition to manage thread wakeups when we have nothing to do */
134 boost::condition _empty_condition;
135 /** condition to manage thread wakeups when we have too much to do */
136 boost::condition _full_condition;
137 /** maximum number of frames to hold in memory, for when we are managing
140 int _maximum_frames_in_memory;
142 /** number of FULL written frames */
144 /** number of FAKE written frames */
147 /** number of frames pushed to disk and then recovered
148 due to the limit of frames to be held in memory.
152 std::list<ReferencedReelAsset> _reel_assets;
154 std::list<boost::shared_ptr<Font> > _fonts;