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 private:
  46         void thread ();
  47         void video (boost::shared_ptr<PlayerVideo> video, DCPTime time);
  48         void audio (boost::shared_ptr<AudioBuffers> audio, DCPTime time);
  49         void player_changed ();
  50         bool should_run () const;
  51
  52         boost::weak_ptr<const Film> _film;
  53         boost::shared_ptr<Player> _player;
  54         boost::thread* _thread;
  55
  56         VideoRingBuffers _video;
  57         AudioRingBuffers _audio;
  58
  59         boost::mutex _mutex;
  60         boost::condition _summon;
  61         boost::condition _arrived;
  62         boost::optional<DCPTime> _pending_seek_position;
  63         bool _pending_seek_accurate;
  64
  65         bool _finished;
  66
  67         AudioMapping _audio_mapping;
  68         int _audio_channels;
  69
  70         bool _stop_thread;
  71
  72         boost::signals2::scoped_connection _player_video_connection;
  73         boost::signals2::scoped_connection _player_audio_connection;
  74         boost::signals2::scoped_connection _player_changed_connection;
  75 };