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>
26 #include <libdcp/subtitle_asset.h>
31 #include "audio_merger.h"
32 #include "audio_content.h"
43 * @brief A class which can `play' a Playlist; emitting its audio and video.
49 boost::weak_ptr<Piece> weak_piece;
50 boost::shared_ptr<const Image> image;
53 VideoContent::Frame frame;
57 /** A wrapper for an Image which contains some pending operations; these may
58 * not be necessary if the receiver of the PlayerImage throws it away.
63 PlayerImage (boost::shared_ptr<const Image>, Crop, libdcp::Size, libdcp::Size, Scaler const *);
65 void set_subtitle (boost::shared_ptr<const Image>, Position<int>);
67 boost::shared_ptr<Image> image ();
70 boost::shared_ptr<const Image> _in;
72 libdcp::Size _inter_size;
73 libdcp::Size _out_size;
74 Scaler const * _scaler;
75 boost::shared_ptr<const Image> _subtitle_image;
76 Position<int> _subtitle_position;
79 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
82 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
84 void disable_video ();
85 void disable_audio ();
88 void seek (Time, bool);
90 Time video_position () const {
91 return _video_position;
94 void set_video_container_size (libdcp::Size);
96 bool repeat_last_video ();
98 /** Emitted when a video frame is ready.
99 * First parameter is the video image.
100 * Second parameter is the eye(s) that should see this image.
101 * Third parameter is the colour conversion that should be used for this image.
102 * Fourth parameter is true if the image is the same as the last one that was emitted.
103 * Fifth parameter is the time.
105 boost::signals2::signal<void (boost::shared_ptr<PlayerImage>, Eyes, ColourConversion, bool, Time)> Video;
107 /** Emitted when some audio data is ready */
108 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, Time)> Audio;
110 /** Emitted when something has changed such that if we went back and emitted
111 * the last frame again it would look different. This is not emitted after
114 * The parameter is true if these signals are currently likely to be frequent.
116 boost::signals2::signal<void (bool)> Changed;
119 friend class PlayerWrapper;
122 void process_video (boost::weak_ptr<Piece>, boost::shared_ptr<const Image>, Eyes, bool, VideoContent::Frame, Time);
123 void process_audio (boost::weak_ptr<Piece>, boost::shared_ptr<const AudioBuffers>, AudioContent::Frame);
124 void process_image_subtitle (boost::weak_ptr<Piece>, boost::shared_ptr<Image>, dcpomatic::Rect<double>, Time, Time);
125 void process_text_subtitle (boost::weak_ptr<Piece>, std::list<libdcp::Subtitle>);
126 void setup_pieces ();
127 void playlist_changed ();
128 void content_changed (boost::weak_ptr<Content>, int, bool);
129 void do_seek (Time, bool);
132 void emit_silence (OutputAudioFrame);
133 boost::shared_ptr<Resampler> resampler (boost::shared_ptr<AudioContent>, bool);
134 void film_changed (Film::Property);
135 void update_subtitle_from_image ();
136 void update_subtitle_from_text ();
138 boost::shared_ptr<const Film> _film;
139 boost::shared_ptr<const Playlist> _playlist;
144 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
145 bool _have_valid_pieces;
146 std::list<boost::shared_ptr<Piece> > _pieces;
148 /** The time after the last video that we emitted */
149 Time _video_position;
150 /** The time after the last audio that we emitted */
151 Time _audio_position;
153 AudioMerger<Time, AudioContent::Frame> _audio_merger;
155 libdcp::Size _video_container_size;
156 boost::shared_ptr<PlayerImage> _black_frame;
157 std::map<boost::shared_ptr<AudioContent>, boost::shared_ptr<Resampler> > _resamplers;
160 boost::weak_ptr<Piece> piece;
161 boost::shared_ptr<Image> image;
162 dcpomatic::Rect<double> rect;
167 std::list<libdcp::Subtitle> _text_subtitles;
170 boost::shared_ptr<Image> image;
171 Position<int> position;
176 #ifdef DCPOMATIC_DEBUG
177 boost::shared_ptr<Content> _last_video;
180 bool _last_emit_was_black;
182 IncomingVideo _last_incoming_video;
184 boost::signals2::scoped_connection _playlist_changed_connection;
185 boost::signals2::scoped_connection _playlist_content_changed_connection;
186 boost::signals2::scoped_connection _film_changed_connection;