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"
43 /** A wrapper for an Image which contains some pending operations; these may
44 * not be necessary if the receiver of the PlayerImage throws it away.
49 PlayerImage (boost::shared_ptr<const Image>, Crop, libdcp::Size, libdcp::Size, Scaler const *);
51 void set_subtitle (boost::shared_ptr<const Image>, Position<int>);
53 boost::shared_ptr<Image> image ();
56 boost::shared_ptr<const Image> _in;
58 libdcp::Size _inter_size;
59 libdcp::Size _out_size;
60 Scaler const * _scaler;
61 boost::shared_ptr<const Image> _subtitle_image;
62 Position<int> _subtitle_position;
66 * @brief A class which can `play' a Playlist; emitting its audio and video.
68 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
71 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
73 void disable_video ();
74 void disable_audio ();
77 void seek (Time, bool);
79 Time video_position () const {
80 return _video_position;
83 void set_video_container_size (libdcp::Size);
85 bool repeat_last_video ();
87 /** Emitted when a video frame is ready.
88 * First parameter is the video image.
89 * Second parameter is the eye(s) that should see this image.
90 * Third parameter is the colour conversion that should be used for this image.
91 * Fourth parameter is true if the image is the same as the last one that was emitted.
92 * Fifth parameter is the time.
94 boost::signals2::signal<void (boost::shared_ptr<PlayerImage>, Eyes, ColourConversion, bool, Time)> Video;
96 /** Emitted when some audio data is ready */
97 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, Time)> Audio;
99 /** Emitted when something has changed such that if we went back and emitted
100 * the last frame again it would look different. This is not emitted after
103 * The parameter is true if these signals are currently likely to be frequent.
105 boost::signals2::signal<void (bool)> Changed;
108 friend class PlayerWrapper;
111 void process_video (boost::weak_ptr<Piece>, boost::shared_ptr<const Image>, Eyes, bool, VideoContent::Frame, Time);
112 void process_audio (boost::weak_ptr<Piece>, boost::shared_ptr<const AudioBuffers>, AudioContent::Frame);
113 void process_subtitle (boost::weak_ptr<Piece>, boost::shared_ptr<Image>, dcpomatic::Rect<double>, Time, Time);
114 void setup_pieces ();
115 void playlist_changed ();
116 void content_changed (boost::weak_ptr<Content>, int, bool);
117 void do_seek (Time, bool);
120 void emit_silence (OutputAudioFrame);
121 boost::shared_ptr<Resampler> resampler (boost::shared_ptr<AudioContent>, bool);
122 void film_changed (Film::Property);
123 void update_subtitle ();
125 boost::shared_ptr<const Film> _film;
126 boost::shared_ptr<const Playlist> _playlist;
131 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
132 bool _have_valid_pieces;
133 std::list<boost::shared_ptr<Piece> > _pieces;
135 /** The time after the last video that we emitted */
136 Time _video_position;
137 /** The time after the last audio that we emitted */
138 Time _audio_position;
140 AudioMerger<Time, AudioContent::Frame> _audio_merger;
142 libdcp::Size _video_container_size;
143 boost::shared_ptr<PlayerImage> _black_frame;
144 std::map<boost::shared_ptr<AudioContent>, boost::shared_ptr<Resampler> > _resamplers;
146 std::list<Subtitle> _subtitles;
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;