src/lib/butler.h

   1 /*
   2     Copyright (C) 2016-2017 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   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.
  10
  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.
  15
  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/>.
  18
  19 */
  20
  21 #include "video_ring_buffers.h"
  22 #include "audio_ring_buffers.h"
  23 #include "audio_mapping.h"
  24 #include "exception_store.h"
  25 #include <boost/shared_ptr.hpp>
  26 #include <boost/weak_ptr.hpp>
  27 #include <boost/thread.hpp>
  28 #include <boost/thread/condition.hpp>
  29 #include <boost/signals2.hpp>
  30
  31 class Film;
  32 class Player;
  33 class PlayerVideo;
  34
  35 class Butler : public ExceptionStore, public boost::noncopyable
  36 {
  37 public:
  38         Butler (boost::weak_ptr<const Film> film, boost::shared_ptr<Player> player, AudioMapping map, int audio_channels);
  39         ~Butler ();
  40
  41         void seek (DCPTime position, bool accurate);
  42         std::pair<boost::shared_ptr<PlayerVideo>, DCPTime> get_video ();
  43         void get_audio (float* out, Frame frames);
  44
  45         void disable_audio ();
  46
  47 private:
  48         void thread ();
  49         void video (boost::shared_ptr<PlayerVideo> video, DCPTime time);
  50         void audio (boost::shared_ptr<AudioBuffers> audio, DCPTime time);
  51         void player_changed ();
  52         bool should_run () const;
  53
  54         boost::weak_ptr<const Film> _film;
  55         boost::shared_ptr<Player> _player;
  56         boost::thread* _thread;
  57
  58         VideoRingBuffers _video;
  59         AudioRingBuffers _audio;
  60
  61         /** mutex to protect _pending_seek_position, _pending_seek_acurate, _finished, _died, _stop_thread */
  62         boost::mutex _mutex;
  63         boost::condition _summon;
  64         boost::condition _arrived;
  65         boost::optional<DCPTime> _pending_seek_position;
  66         bool _pending_seek_accurate;
  67         bool _finished;
  68         bool _died;
  69         bool _stop_thread;
  70
  71         AudioMapping _audio_mapping;
  72         int _audio_channels;
  73
  74         bool _disable_audio;
  75
  76         boost::signals2::scoped_connection _player_video_connection;
  77         boost::signals2::scoped_connection _player_audio_connection;
  78         boost::signals2::scoped_connection _player_changed_connection;
  79 };