2 Copyright (C) 2013 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 * @brief A class which can `play' a Playlist; emitting its audio and video.
48 boost::weak_ptr<Piece> weak_piece;
49 boost::shared_ptr<const Image> image;
52 VideoContent::Frame frame;
55 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
58 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
60 void disable_video ();
61 void disable_audio ();
64 void seek (Time, bool);
66 Time video_position () const {
67 return _video_position;
70 void set_video_container_size (libdcp::Size);
72 bool repeat_last_video ();
74 /** Emitted when a video frame is ready.
75 * First parameter is the video image.
76 * Second parameter is the eye(s) that should see this image.
77 * Third parameter is the colour conversion that should be used for this image.
78 * Fourth parameter is true if the image is the same as the last one that was emitted.
79 * Fifth parameter is the time.
81 boost::signals2::signal<void (boost::shared_ptr<const Image>, Eyes, ColourConversion, bool, Time)> Video;
83 /** Emitted when some audio data is ready */
84 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, Time)> Audio;
86 /** Emitted when something has changed such that if we went back and emitted
87 * the last frame again it would look different. This is not emitted after
90 * The parameter is true if these signals are currently likely to be frequent.
92 boost::signals2::signal<void (bool)> Changed;
95 friend class PlayerWrapper;
98 void process_video (boost::weak_ptr<Piece>, boost::shared_ptr<const Image>, Eyes, bool, VideoContent::Frame, Time);
99 void process_audio (boost::weak_ptr<Piece>, boost::shared_ptr<const AudioBuffers>, AudioContent::Frame);
100 void process_subtitle (boost::weak_ptr<Piece>, boost::shared_ptr<Image>, dcpomatic::Rect<double>, Time, Time);
101 void setup_pieces ();
102 void playlist_changed ();
103 void content_changed (boost::weak_ptr<Content>, int, bool);
104 void do_seek (Time, bool);
107 void emit_silence (OutputAudioFrame);
108 boost::shared_ptr<Resampler> resampler (boost::shared_ptr<AudioContent>, bool);
109 void film_changed (Film::Property);
110 void update_subtitle ();
112 boost::shared_ptr<const Film> _film;
113 boost::shared_ptr<const Playlist> _playlist;
118 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
119 bool _have_valid_pieces;
120 std::list<boost::shared_ptr<Piece> > _pieces;
122 /** The time after the last video that we emitted */
123 Time _video_position;
124 /** The time after the last audio that we emitted */
125 Time _audio_position;
127 AudioMerger<Time, AudioContent::Frame> _audio_merger;
129 libdcp::Size _video_container_size;
130 boost::shared_ptr<Image> _black_frame;
131 std::map<boost::shared_ptr<AudioContent>, boost::shared_ptr<Resampler> > _resamplers;
134 boost::weak_ptr<Piece> piece;
135 boost::shared_ptr<Image> image;
136 dcpomatic::Rect<double> rect;
142 boost::shared_ptr<Image> image;
143 Position<int> position;
148 #ifdef DCPOMATIC_DEBUG
149 boost::shared_ptr<Content> _last_video;
152 bool _last_emit_was_black;
154 IncomingVideo _last_incoming_video;
156 boost::signals2::scoped_connection _playlist_changed_connection;
157 boost::signals2::scoped_connection _playlist_content_changed_connection;
158 boost::signals2::scoped_connection _film_changed_connection;