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;
56 /** A wrapper for an Image which contains some pending operations; these may
57 * not be necessary if the receiver of the PlayerImage throws it away.
62 PlayerImage (boost::shared_ptr<const Image>, Crop, libdcp::Size, libdcp::Size, Scaler const *);
64 void set_subtitle (boost::shared_ptr<const Image>, Position<int>);
66 boost::shared_ptr<Image> image ();
69 boost::shared_ptr<const Image> _in;
71 libdcp::Size _inter_size;
72 libdcp::Size _out_size;
73 Scaler const * _scaler;
74 boost::shared_ptr<const Image> _subtitle_image;
75 Position<int> _subtitle_position;
78 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
81 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
83 void disable_video ();
84 void disable_audio ();
87 void seek (Time, bool);
89 Time video_position () const {
90 return _video_position;
93 void set_video_container_size (libdcp::Size);
95 bool repeat_last_video ();
97 /** Emitted when a video frame is ready.
98 * First parameter is the video image.
99 * Second parameter is the eye(s) that should see this image.
100 * Third parameter is the colour conversion that should be used for this image.
101 * Fourth parameter is true if the image is the same as the last one that was emitted.
102 * Fifth parameter is the time.
104 boost::signals2::signal<void (boost::shared_ptr<PlayerImage>, Eyes, ColourConversion, bool, Time)> Video;
106 /** Emitted when some audio data is ready */
107 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, Time)> Audio;
109 /** Emitted when something has changed such that if we went back and emitted
110 * the last frame again it would look different. This is not emitted after
113 * The parameter is true if these signals are currently likely to be frequent.
115 boost::signals2::signal<void (bool)> Changed;
118 friend class PlayerWrapper;
121 void process_video (boost::weak_ptr<Piece>, boost::shared_ptr<const Image>, Eyes, bool, VideoContent::Frame, Time);
122 void process_audio (boost::weak_ptr<Piece>, boost::shared_ptr<const AudioBuffers>, AudioContent::Frame);
123 void process_subtitle (boost::weak_ptr<Piece>, boost::shared_ptr<Image>, dcpomatic::Rect<double>, Time, Time);
124 void setup_pieces ();
125 void playlist_changed ();
126 void content_changed (boost::weak_ptr<Content>, int, bool);
127 void do_seek (Time, bool);
130 void emit_silence (OutputAudioFrame);
131 boost::shared_ptr<Resampler> resampler (boost::shared_ptr<AudioContent>, bool);
132 void film_changed (Film::Property);
133 void update_subtitle ();
135 boost::shared_ptr<const Film> _film;
136 boost::shared_ptr<const Playlist> _playlist;
141 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
142 bool _have_valid_pieces;
143 std::list<boost::shared_ptr<Piece> > _pieces;
145 /** The time after the last video that we emitted */
146 Time _video_position;
147 /** The time after the last audio that we emitted */
148 Time _audio_position;
150 AudioMerger<Time, AudioContent::Frame> _audio_merger;
152 libdcp::Size _video_container_size;
153 boost::shared_ptr<PlayerImage> _black_frame;
154 std::map<boost::shared_ptr<AudioContent>, boost::shared_ptr<Resampler> > _resamplers;
157 boost::weak_ptr<Piece> piece;
158 boost::shared_ptr<Image> image;
159 dcpomatic::Rect<double> rect;
165 boost::shared_ptr<Image> image;
166 Position<int> position;
171 #ifdef DCPOMATIC_DEBUG
172 boost::shared_ptr<Content> _last_video;
175 bool _last_emit_was_black;
177 IncomingVideo _last_incoming_video;
179 boost::signals2::scoped_connection _playlist_changed_connection;
180 boost::signals2::scoped_connection _playlist_content_changed_connection;
181 boost::signals2::scoped_connection _film_changed_connection;