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;
46 * @brief A class which can `play' a Playlist; emitting its audio and video.
48 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
51 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
53 void disable_video ();
54 void disable_audio ();
57 void seek (Time, bool);
59 Time video_position () const {
60 return _video_position;
63 void set_video_container_size (libdcp::Size);
65 bool repeat_last_video ();
67 /** Emitted when a video frame is ready.
68 * First parameter is the video image.
69 * Second parameter is true if the frame is the same as the last one that was emitted.
70 * Third parameter is the time.
72 boost::signals2::signal<void (boost::shared_ptr<PlayerVideoFrame>, bool, Time)> Video;
74 /** Emitted when some audio data is ready */
75 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, Time)> Audio;
77 /** Emitted when something has changed such that if we went back and emitted
78 * the last frame again it would look different. This is not emitted after
81 * The parameter is true if these signals are currently likely to be frequent.
83 boost::signals2::signal<void (bool)> Changed;
86 friend class PlayerWrapper;
89 void process_video (boost::weak_ptr<Piece>, boost::shared_ptr<const ImageProxy>, Eyes, Part, bool, VideoContent::Frame, Time);
90 void process_audio (boost::weak_ptr<Piece>, boost::shared_ptr<const AudioBuffers>, AudioContent::Frame, bool);
91 void process_subtitle (boost::weak_ptr<Piece>, boost::shared_ptr<Image>, dcpomatic::Rect<double>, Time, Time);
93 void playlist_changed ();
94 void content_changed (boost::weak_ptr<Content>, int, bool);
95 void do_seek (Time, bool);
98 void emit_silence (OutputAudioFrame);
99 boost::shared_ptr<Resampler> resampler (boost::shared_ptr<AudioContent>, bool);
100 void film_changed (Film::Property);
101 void update_subtitle ();
103 boost::shared_ptr<const Film> _film;
104 boost::shared_ptr<const Playlist> _playlist;
109 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
110 bool _have_valid_pieces;
111 std::list<boost::shared_ptr<Piece> > _pieces;
113 /** The time after the last video that we emitted */
114 Time _video_position;
115 /** The time after the last audio that we emitted */
116 Time _audio_position;
118 AudioMerger<Time, AudioContent::Frame> _audio_merger;
120 libdcp::Size _video_container_size;
121 boost::shared_ptr<PlayerVideoFrame> _black_frame;
122 std::map<boost::shared_ptr<AudioContent>, boost::shared_ptr<Resampler> > _resamplers;
124 std::list<Subtitle> _subtitles;
126 #ifdef DCPOMATIC_DEBUG
127 boost::shared_ptr<Content> _last_video;
130 bool _last_emit_was_black;
132 IncomingVideo _last_incoming_video;
134 boost::signals2::scoped_connection _playlist_changed_connection;
135 boost::signals2::scoped_connection _playlist_content_changed_connection;
136 boost::signals2::scoped_connection _film_changed_connection;