2 Copyright (C) 2016-2017 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/>.
24 #include <boost/weak_ptr.hpp>
25 #include <boost/shared_ptr.hpp>
30 using boost::weak_ptr;
31 using boost::shared_ptr;
33 using boost::optional;
35 /** Video readahead in frames */
36 #define VIDEO_READAHEAD 10
37 /** Audio readahead in frames */
38 #define AUDIO_READAHEAD (48000*5)
40 Butler::Butler (weak_ptr<const Film> film, shared_ptr<Player> player, AudioMapping audio_mapping, int audio_channels)
43 , _pending_seek_accurate (false)
46 , _stop_thread (false)
47 , _audio_mapping (audio_mapping)
48 , _audio_channels (audio_channels)
49 , _disable_audio (false)
51 _player_video_connection = _player->Video.connect (bind (&Butler::video, this, _1, _2));
52 _player_audio_connection = _player->Audio.connect (bind (&Butler::audio, this, _1));
53 _player_changed_connection = _player->Changed.connect (bind (&Butler::player_changed, this));
54 _thread = new boost::thread (bind (&Butler::thread, this));
60 boost::mutex::scoped_lock lm (_mutex);
64 _thread->interrupt ();
67 } catch (boost::thread_interrupted& e) {
73 /** Caller must hold a lock on _mutex */
75 Butler::should_run () const
77 return (_video.size() < VIDEO_READAHEAD || (!_disable_audio && _audio.size() < AUDIO_READAHEAD)) && !_stop_thread && !_finished && !_died;
85 boost::mutex::scoped_lock lm (_mutex);
87 /* Wait until we have something to do */
88 while (!should_run() && !_pending_seek_position) {
92 /* Do any seek that has been requested */
93 if (_pending_seek_position) {
95 _player->seek (*_pending_seek_position, _pending_seek_accurate);
96 _pending_seek_position = optional<DCPTime> ();
99 /* Fill _video and _audio. Don't try to carry on if a pending seek appears
100 while lm is unlocked, as in that state nothing will be added to
103 while (should_run() && !_pending_seek_position) {
105 bool const r = _player->pass ();
109 _arrived.notify_all ();
112 _arrived.notify_all ();
115 } catch (boost::thread_interrupted) {
116 /* The butler thread is being terminated */
117 boost::mutex::scoped_lock lm (_mutex);
119 _arrived.notify_all ();
122 boost::mutex::scoped_lock lm (_mutex);
124 _arrived.notify_all ();
127 pair<shared_ptr<PlayerVideo>, DCPTime>
130 boost::mutex::scoped_lock lm (_mutex);
132 /* Wait for data if we have none */
133 while (_video.empty() && !_finished && !_died) {
137 if (_video.empty()) {
138 return make_pair (shared_ptr<PlayerVideo>(), DCPTime());
141 pair<shared_ptr<PlayerVideo>, DCPTime> const r = _video.get ();
142 _summon.notify_all ();
147 Butler::seek (DCPTime position, bool accurate)
149 boost::mutex::scoped_lock lm (_mutex);
157 _pending_seek_position = position;
158 _pending_seek_accurate = accurate;
159 _summon.notify_all ();
163 Butler::video (shared_ptr<PlayerVideo> video, DCPTime time)
166 boost::mutex::scoped_lock lm (_mutex);
167 if (_pending_seek_position) {
168 /* Don't store any video while a seek is pending */
173 _video.put (video, time);
177 Butler::audio (shared_ptr<AudioBuffers> audio)
180 boost::mutex::scoped_lock lm (_mutex);
181 if (_pending_seek_position || _disable_audio) {
182 /* Don't store any audio while a seek is pending, or if audio is disabled */
187 _audio.put (remap (audio, _audio_channels, _audio_mapping));
191 Butler::player_changed ()
196 boost::mutex::scoped_lock lm (_mutex);
197 t = _video.earliest ();
209 Butler::get_audio (float* out, Frame frames)
211 _audio.get (out, _audio_channels, frames);
212 _summon.notify_all ();
216 Butler::disable_audio ()
218 boost::mutex::scoped_lock lm (_mutex);
219 _disable_audio = true;