2 Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef DCPOMATIC_PLAYER_H
21 #define DCPOMATIC_PLAYER_H
24 #include <boost/shared_ptr.hpp>
25 #include <boost/enable_shared_from_this.hpp>
30 #include "audio_merger.h"
31 #include "audio_content.h"
42 class PlayerVideoFrame;
45 * @brief A class which can `play' a Playlist; emitting its audio and video.
47 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
50 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
52 void disable_video ();
53 void disable_audio ();
56 void seek (Time, bool);
58 Time video_position () const {
59 return _video_position;
62 void set_video_container_size (libdcp::Size);
64 bool repeat_last_video ();
66 /** Emitted when a video frame is ready.
67 * First parameter is the video image.
68 * Second parameter is true if the frame is the same as the last one that was emitted.
69 * Third parameter is the time.
71 boost::signals2::signal<void (boost::shared_ptr<PlayerVideoFrame>, bool, Time)> Video;
73 /** Emitted when some audio data is ready */
74 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, Time)> Audio;
76 /** Emitted when something has changed such that if we went back and emitted
77 * the last frame again it would look different. This is not emitted after
80 * The parameter is true if these signals are currently likely to be frequent.
82 boost::signals2::signal<void (bool)> Changed;
85 friend class PlayerWrapper;
88 void process_video (boost::weak_ptr<Piece>, boost::shared_ptr<const Image>, Eyes, bool, VideoContent::Frame, Time);
89 void process_audio (boost::weak_ptr<Piece>, boost::shared_ptr<const AudioBuffers>, AudioContent::Frame);
90 void process_subtitle (boost::weak_ptr<Piece>, boost::shared_ptr<Image>, dcpomatic::Rect<double>, Time, Time);
92 void playlist_changed ();
93 void content_changed (boost::weak_ptr<Content>, int, bool);
94 void do_seek (Time, bool);
97 void emit_silence (OutputAudioFrame);
98 boost::shared_ptr<Resampler> resampler (boost::shared_ptr<AudioContent>, bool);
99 void film_changed (Film::Property);
100 void update_subtitle ();
102 boost::shared_ptr<const Film> _film;
103 boost::shared_ptr<const Playlist> _playlist;
108 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
109 bool _have_valid_pieces;
110 std::list<boost::shared_ptr<Piece> > _pieces;
112 /** The time after the last video that we emitted */
113 Time _video_position;
114 /** The time after the last audio that we emitted */
115 Time _audio_position;
117 AudioMerger<Time, AudioContent::Frame> _audio_merger;
119 libdcp::Size _video_container_size;
120 boost::shared_ptr<PlayerVideoFrame> _black_frame;
121 std::map<boost::shared_ptr<AudioContent>, boost::shared_ptr<Resampler> > _resamplers;
123 std::list<Subtitle> _subtitles;
125 #ifdef DCPOMATIC_DEBUG
126 boost::shared_ptr<Content> _last_video;
129 bool _last_emit_was_black;
131 IncomingVideo _last_incoming_video;
133 boost::signals2::scoped_connection _playlist_changed_connection;
134 boost::signals2::scoped_connection _playlist_content_changed_connection;
135 boost::signals2::scoped_connection _film_changed_connection;