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"
42 /** @class PlayerImage
43 * @brief 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 (AVPixelFormat, bool);
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;
65 class PlayerStatistics
94 void dump (boost::shared_ptr<Log>) const;
98 * @brief A class which can `play' a Playlist; emitting its audio and video.
101 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
104 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
106 void disable_video ();
107 void disable_audio ();
110 void seek (DCPTime, bool);
112 DCPTime video_position () const {
113 return _video_position;
116 void set_video_container_size (libdcp::Size);
117 void set_approximate_size ();
119 bool repeat_last_video ();
121 PlayerStatistics const & statistics () const;
123 /** Emitted when a video frame is ready.
124 * First parameter is the video image.
125 * Second parameter is the eye(s) that should see this image.
126 * Third parameter is the colour conversion that should be used for this image.
127 * Fourth parameter is true if the image is the same as the last one that was emitted.
128 * Fifth parameter is the time.
130 boost::signals2::signal<void (boost::shared_ptr<PlayerImage>, Eyes, ColourConversion, bool, DCPTime)> Video;
132 /** Emitted when some audio data is ready */
133 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, DCPTime)> Audio;
135 /** Emitted when something has changed such that if we went back and emitted
136 * the last frame again it would look different. This is not emitted after
139 * The parameter is true if these signals are currently likely to be frequent.
141 boost::signals2::signal<void (bool)> Changed;
144 friend class PlayerWrapper;
147 void setup_pieces ();
148 void playlist_changed ();
149 void content_changed (boost::weak_ptr<Content>, int, bool);
150 void do_seek (DCPTime, bool);
153 void emit_silence (AudioFrame);
154 void film_changed (Film::Property);
155 void update_subtitle_from_image ();
156 void update_subtitle_from_text ();
157 void emit_video (boost::weak_ptr<Piece>, boost::shared_ptr<DecodedVideo>);
158 void emit_audio (boost::weak_ptr<Piece>, boost::shared_ptr<DecodedAudio>);
159 void step_video_position (boost::shared_ptr<DecodedVideo>);
161 boost::shared_ptr<const Film> _film;
162 boost::shared_ptr<const Playlist> _playlist;
167 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
168 bool _have_valid_pieces;
169 std::list<boost::shared_ptr<Piece> > _pieces;
171 /** The time after the last video that we emitted */
172 DCPTime _video_position;
173 /** The time after the last audio that we emitted */
174 DCPTime _audio_position;
176 AudioMerger<DCPTime, AudioFrame> _audio_merger;
178 libdcp::Size _video_container_size;
179 boost::shared_ptr<PlayerImage> _black_frame;
182 boost::weak_ptr<Piece> piece;
183 boost::shared_ptr<DecodedImageSubtitle> subtitle;
187 boost::weak_ptr<Piece> piece;
188 boost::shared_ptr<DecodedTextSubtitle> subtitle;
192 Position<int> position;
193 boost::shared_ptr<Image> image;
198 #ifdef DCPOMATIC_DEBUG
199 boost::shared_ptr<Content> _last_video;
202 bool _last_emit_was_black;
205 boost::weak_ptr<Piece> weak_piece;
206 boost::shared_ptr<DecodedVideo> video;
207 } _last_incoming_video;
209 bool _just_did_inaccurate_seek;
210 bool _approximate_size;
212 PlayerStatistics _statistics;
214 boost::signals2::scoped_connection _playlist_changed_connection;
215 boost::signals2::scoped_connection _playlist_content_changed_connection;
216 boost::signals2::scoped_connection _film_changed_connection;