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"
41 /** @class PlayerImage
42 * @brief 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 (AVPixelFormat, bool);
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.
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 (DCPTime, bool);
79 DCPTime video_position () const {
80 return _video_position;
83 void set_video_container_size (libdcp::Size);
84 void set_approximate_size ();
86 bool repeat_last_video ();
88 /** Emitted when a video frame is ready.
89 * First parameter is the video image.
90 * Second parameter is the eye(s) that should see this image.
91 * Third parameter is the colour conversion that should be used for this image.
92 * Fourth parameter is true if the image is the same as the last one that was emitted.
93 * Fifth parameter is the time.
95 boost::signals2::signal<void (boost::shared_ptr<PlayerImage>, Eyes, ColourConversion, bool, DCPTime)> Video;
97 /** Emitted when some audio data is ready */
98 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, DCPTime)> Audio;
100 /** Emitted when something has changed such that if we went back and emitted
101 * the last frame again it would look different. This is not emitted after
104 * The parameter is true if these signals are currently likely to be frequent.
106 boost::signals2::signal<void (bool)> Changed;
109 friend class PlayerWrapper;
112 void setup_pieces ();
113 void playlist_changed ();
114 void content_changed (boost::weak_ptr<Content>, int, bool);
115 void do_seek (DCPTime, bool);
118 void emit_silence (OutputAudioFrame);
119 void film_changed (Film::Property);
120 void update_subtitle ();
121 void emit_video (boost::weak_ptr<Piece>, boost::shared_ptr<DecodedVideo>);
122 void emit_audio (boost::weak_ptr<Piece>, boost::shared_ptr<DecodedAudio>);
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 DCPTime _video_position;
136 /** The time after the last audio that we emitted */
137 DCPTime _audio_position;
139 AudioMerger<DCPTime, AudioContent::Frame> _audio_merger;
141 libdcp::Size _video_container_size;
142 boost::shared_ptr<PlayerImage> _black_frame;
145 boost::weak_ptr<Piece> piece;
146 boost::shared_ptr<DecodedSubtitle> subtitle;
150 Position<int> position;
151 boost::shared_ptr<DecodedSubtitle> subtitle;
154 #ifdef DCPOMATIC_DEBUG
155 boost::shared_ptr<Content> _last_video;
158 bool _last_emit_was_black;
161 boost::weak_ptr<Piece> weak_piece;
162 boost::shared_ptr<DecodedVideo> video;
163 } _last_incoming_video;
165 bool _just_did_inaccurate_seek;
166 bool _approximate_size;
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;