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 /** A wrapper for an Image which contains some pending operations; these may
43 * not be necessary if the receiver of the PlayerImage throws it away.
48 PlayerImage (boost::shared_ptr<const Image>, Crop, libdcp::Size, libdcp::Size, Scaler const *);
50 void set_subtitle (boost::shared_ptr<const Image>, Position<int>);
52 boost::shared_ptr<Image> image ();
55 boost::shared_ptr<const Image> _in;
57 libdcp::Size _inter_size;
58 libdcp::Size _out_size;
59 Scaler const * _scaler;
60 boost::shared_ptr<const Image> _subtitle_image;
61 Position<int> _subtitle_position;
65 * @brief A class which can `play' a Playlist; emitting its audio and video.
67 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
70 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
72 void disable_video ();
73 void disable_audio ();
76 void seek (Time, bool);
78 Time video_position () const {
79 return _video_position;
82 void set_video_container_size (libdcp::Size);
84 bool repeat_last_video ();
86 /** Emitted when a video frame is ready.
87 * First parameter is the video image.
88 * Second parameter is the eye(s) that should see this image.
89 * Third parameter is the colour conversion that should be used for this image.
90 * Fourth parameter is true if the image is the same as the last one that was emitted.
91 * Fifth parameter is the time.
93 boost::signals2::signal<void (boost::shared_ptr<PlayerImage>, Eyes, ColourConversion, bool, Time)> Video;
95 /** Emitted when some audio data is ready */
96 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, Time)> Audio;
98 /** Emitted when something has changed such that if we went back and emitted
99 * the last frame again it would look different. This is not emitted after
102 * The parameter is true if these signals are currently likely to be frequent.
104 boost::signals2::signal<void (bool)> Changed;
107 friend class PlayerWrapper;
110 void process_video (boost::weak_ptr<Piece>, boost::shared_ptr<const Image>, Eyes, bool, VideoContent::Frame, Time);
111 void process_audio (boost::weak_ptr<Piece>, boost::shared_ptr<const AudioBuffers>, AudioContent::Frame);
112 void process_subtitle (boost::weak_ptr<Piece>, boost::shared_ptr<Image>, dcpomatic::Rect<double>, Time, Time);
113 void setup_pieces ();
114 void playlist_changed ();
115 void content_changed (boost::weak_ptr<Content>, int, bool);
116 void do_seek (Time, bool);
119 void emit_silence (OutputAudioFrame);
120 boost::shared_ptr<Resampler> resampler (boost::shared_ptr<AudioContent>, bool);
121 void film_changed (Film::Property);
122 void update_subtitle ();
124 boost::shared_ptr<const Film> _film;
125 boost::shared_ptr<const Playlist> _playlist;
130 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
131 bool _have_valid_pieces;
132 std::list<boost::shared_ptr<Piece> > _pieces;
134 /** The time after the last video that we emitted */
135 Time _video_position;
136 /** The time after the last audio that we emitted */
137 Time _audio_position;
139 AudioMerger<Time, AudioContent::Frame> _audio_merger;
141 libdcp::Size _video_container_size;
142 boost::shared_ptr<PlayerImage> _black_frame;
143 std::map<boost::shared_ptr<AudioContent>, boost::shared_ptr<Resampler> > _resamplers;
146 boost::weak_ptr<Piece> piece;
147 boost::shared_ptr<Image> image;
148 dcpomatic::Rect<double> rect;
154 boost::shared_ptr<Image> image;
155 Position<int> position;
160 #ifdef DCPOMATIC_DEBUG
161 boost::shared_ptr<Content> _last_video;
164 bool _last_emit_was_black;
166 IncomingVideo _last_incoming_video;
168 boost::signals2::scoped_connection _playlist_changed_connection;
169 boost::signals2::scoped_connection _playlist_content_changed_connection;
170 boost::signals2::scoped_connection _film_changed_connection;