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>
27 #include "audio_buffers.h"
40 * @brief A class which can `play' a Playlist; emitting its audio and video.
43 class Player : public boost::enable_shared_from_this<Player>
46 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist>);
48 void disable_video ();
49 void disable_audio ();
52 void seek (Time, bool);
54 Time video_position () const {
55 return _video_position;
58 void set_video_container_size (libdcp::Size);
60 /** Emitted when a video frame is ready.
61 * First parameter is the video image.
62 * Second parameter is true if the image is the same as the last one that was emitted.
63 * Third parameter is the time.
65 boost::signals2::signal<void (boost::shared_ptr<const Image>, bool, Time)> Video;
67 /** Emitted when some audio data is ready */
68 boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, Time)> Audio;
70 /** Emitted when something has changed such that if we went back and emitted
71 * the last frame again it would look different. This is not emitted after
74 boost::signals2::signal<void ()> Changed;
78 void process_video (boost::weak_ptr<Piece>, boost::shared_ptr<const Image>, bool, VideoContent::Frame);
79 void process_audio (boost::weak_ptr<Piece>, boost::shared_ptr<const AudioBuffers>, AudioContent::Frame);
81 void playlist_changed ();
82 void content_changed (boost::weak_ptr<Content>, int);
83 void do_seek (Time, bool);
86 void emit_silence (OutputAudioFrame);
87 boost::shared_ptr<Resampler> resampler (boost::shared_ptr<AudioContent>);
88 void film_changed (Film::Property);
90 boost::shared_ptr<const Film> _film;
91 boost::shared_ptr<const Playlist> _playlist;
96 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
97 bool _have_valid_pieces;
98 std::list<boost::shared_ptr<Piece> > _pieces;
100 /** The time after the last video that we emitted */
101 Time _video_position;
102 /** The time after the last audio that we emitted */
103 Time _audio_position;
105 AudioBuffers _audio_buffers;
107 libdcp::Size _video_container_size;
108 boost::shared_ptr<Image> _black_frame;
109 std::map<boost::shared_ptr<AudioContent>, boost::shared_ptr<Resampler> > _resamplers;