2 Copyright (C) 2012-2015 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/>.
21 /** @file src/lib/writer.h
22 * @brief Writer class.
26 #include "player_subtitles.h"
27 #include "exception_store.h"
28 #include <boost/shared_ptr.hpp>
29 #include <boost/weak_ptr.hpp>
30 #include <boost/thread.hpp>
31 #include <boost/thread/condition.hpp>
42 class ReferencedReelAsset;
56 /** a normal frame with some JPEG200 data */
58 /** a frame whose data already exists in the MXF,
59 and we fake-write it; i.e. we update the writer's
60 state but we use the data that is already on disk.
66 /** encoded data for FULL */
67 boost::optional<dcp::Data> encoded;
68 /** size of data for FAKE */
72 /** frame index within the reel */
74 /** eyes for FULL, FAKE and REPEAT */
78 bool operator< (QueueItem const & a, QueueItem const & b);
79 bool operator== (QueueItem const & a, QueueItem const & b);
82 * @brief Class to manage writing JPEG2000 and audio data to assets on disk.
84 * This class creates sound and picture assets, then takes Data
85 * or AudioBuffers objects (containing image or sound data respectively)
86 * and writes them to the assets.
88 * write() for Data (picture) can be called out of order, and the Writer
89 * will sort it out. write() for AudioBuffers must be called in order.
92 class Writer : public ExceptionStore, public boost::noncopyable
95 Writer (boost::shared_ptr<const Film>, boost::weak_ptr<Job>);
100 bool can_fake_write (Frame) const;
102 void write (dcp::Data, Frame, Eyes);
103 void fake_write (Frame, Eyes);
104 bool can_repeat (Frame) const;
105 void repeat (Frame, Eyes);
106 void write (boost::shared_ptr<const AudioBuffers>, DCPTime time);
107 void write (PlayerSubtitles subs, DCPTimePeriod period);
108 void write (std::list<boost::shared_ptr<Font> > fonts);
109 void write (ReferencedReelAsset asset);
112 void set_encoder_threads (int threads);
116 void terminate_thread (bool);
117 bool have_sequenced_image_at_queue_head ();
118 size_t video_reel (int frame) const;
119 void set_digest_progress (Job* job, float progress);
120 void write_cover_sheet ();
123 boost::shared_ptr<const Film> _film;
124 boost::weak_ptr<Job> _job;
125 std::vector<ReelWriter> _reels;
126 std::vector<ReelWriter>::iterator _audio_reel;
127 std::vector<ReelWriter>::iterator _subtitle_reel;
129 /** our thread, or 0 */
130 boost::thread* _thread;
131 /** true if our thread should finish */
133 /** queue of things to write to disk */
134 std::list<QueueItem> _queue;
135 /** number of FULL frames whose JPEG200 data is currently held in RAM */
136 int _queued_full_in_memory;
137 /** mutex for thread state */
138 mutable boost::mutex _state_mutex;
139 /** condition to manage thread wakeups when we have nothing to do */
140 boost::condition _empty_condition;
141 /** condition to manage thread wakeups when we have too much to do */
142 boost::condition _full_condition;
143 /** maximum number of frames to hold in memory, for when we are managing
146 int _maximum_frames_in_memory;
148 /** number of FULL written frames */
150 /** number of FAKE written frames */
153 /** number of frames pushed to disk and then recovered
154 due to the limit of frames to be held in memory.
158 boost::mutex _digest_progresses_mutex;
159 std::map<boost::thread::id, float> _digest_progresses;
161 std::list<ReferencedReelAsset> _reel_assets;
163 std::list<boost::shared_ptr<Font> > _fonts;