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/>.
23 #include <boost/weak_ptr.hpp>
24 #include <boost/shared_ptr.hpp>
29 using boost::weak_ptr;
30 using boost::shared_ptr;
32 using boost::optional;
34 /** Video readahead in frames */
35 #define VIDEO_READAHEAD 10
36 /** Audio readahead in frames */
37 #define AUDIO_READAHEAD (48000*5)
39 Butler::Butler (weak_ptr<const Film> film, shared_ptr<Player> player, AudioMapping audio_mapping, int audio_channels)
42 , _pending_seek_accurate (false)
44 , _audio_mapping (audio_mapping)
45 , _audio_channels (audio_channels)
46 , _stop_thread (false)
48 _player_video_connection = _player->Video.connect (bind (&Butler::video, this, _1, _2));
49 _player_audio_connection = _player->Audio.connect (bind (&Butler::audio, this, _1, _2));
50 _player_changed_connection = _player->Changed.connect (bind (&Butler::player_changed, this));
51 _thread = new boost::thread (bind (&Butler::thread, this));
57 _thread->interrupt ();
60 } catch (boost::thread_interrupted& e) {
71 boost::mutex::scoped_lock lm (_mutex);
73 /* Wait until we have something to do */
74 while ((_video.size() >= VIDEO_READAHEAD && _audio.size() >= AUDIO_READAHEAD && !_pending_seek_position) || _stop_thread) {
78 /* Do any seek that has been requested */
79 if (_pending_seek_position) {
80 _player->seek (*_pending_seek_position, _pending_seek_accurate);
81 _pending_seek_position = optional<DCPTime> ();
84 /* Fill _video and _audio. Don't try to carry on if a pending seek appears
85 while lm is unlocked, as in that state nothing will be added to
88 while ((_video.size() < VIDEO_READAHEAD || _audio.size() < AUDIO_READAHEAD) && !_pending_seek_position && !_stop_thread) {
90 if (_player->pass ()) {
92 _arrived.notify_all ();
96 _arrived.notify_all ();
99 } catch (boost::thread_interrupted) {
100 /* The butler thread is being terminated */
105 pair<shared_ptr<PlayerVideo>, DCPTime>
108 boost::mutex::scoped_lock lm (_mutex);
110 /* Wait for data if we have none */
111 while (_video.empty() && !_finished) {
116 return make_pair (shared_ptr<PlayerVideo>(), DCPTime());
119 pair<shared_ptr<PlayerVideo>, DCPTime> const r = _video.get ();
120 _summon.notify_all ();
125 Butler::seek (DCPTime position, bool accurate)
127 boost::mutex::scoped_lock lm (_mutex);
130 _pending_seek_position = position;
131 _pending_seek_accurate = accurate;
132 _summon.notify_all ();
136 Butler::video (shared_ptr<PlayerVideo> video, DCPTime time)
139 boost::mutex::scoped_lock lm (_mutex);
140 if (_pending_seek_position) {
141 /* Don't store any video while a seek is pending */
146 _video.put (video, time);
150 Butler::audio (shared_ptr<AudioBuffers> audio, DCPTime time)
153 boost::mutex::scoped_lock lm (_mutex);
154 if (_pending_seek_position) {
155 /* Don't store any audio while a seek is pending */
160 _audio.put (audio, time);
164 Butler::player_changed ()
169 boost::mutex::scoped_lock lm (_mutex);
170 t = _video.earliest ();
182 Butler::get_audio (float* out, Frame frames)
184 _audio.get (out, _audio_channels, frames);
185 _summon.notify_all ();