2 Copyright (C) 2013-2015 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
23 #include "player_subtitles.h"
26 #include "position_image.h"
28 #include <boost/shared_ptr.hpp>
29 #include <boost/enable_shared_from_this.hpp>
38 * @brief A class which can `play' a Playlist.
40 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
43 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist> playlist);
45 std::list<boost::shared_ptr<PlayerVideo> > get_video (DCPTime time, bool accurate);
46 boost::shared_ptr<AudioBuffers> get_audio (DCPTime time, DCPTime length, bool accurate);
47 PlayerSubtitles get_subtitles (DCPTime time, DCPTime length, bool starting, bool burnt);
48 std::list<boost::shared_ptr<Font> > get_subtitle_fonts ();
50 void set_video_container_size (dcp::Size);
51 void set_ignore_video ();
52 void set_ignore_audio ();
53 void set_enable_subtitles (bool enable);
54 void set_always_burn_subtitles (bool burn);
57 /** Emitted when something has changed such that if we went back and emitted
58 * the last frame again it would look different. This is not emitted after
61 * The parameter is true if these signals are currently likely to be frequent.
63 boost::signals2::signal<void (bool)> Changed;
66 friend class PlayerWrapper;
68 friend struct player_overlaps_test;
69 friend struct player_time_calculation_test1;
70 friend struct player_time_calculation_test2;
71 friend struct player_time_calculation_test3;
75 void film_changed (Film::Property);
76 void playlist_changed ();
77 void playlist_content_changed (boost::weak_ptr<Content>, int, bool);
78 std::list<PositionImage> transform_image_subtitles (std::list<ImageSubtitle>) const;
79 void update_subtitle_from_text ();
80 Frame dcp_to_content_video (boost::shared_ptr<const Piece> piece, DCPTime t) const;
81 DCPTime content_video_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
82 Frame dcp_to_resampled_audio (boost::shared_ptr<const Piece> piece, DCPTime t) const;
83 ContentTime dcp_to_content_subtitle (boost::shared_ptr<const Piece> piece, DCPTime t) const;
84 boost::shared_ptr<PlayerVideo> black_player_video_frame (DCPTime) const;
86 /** @return Pieces of content type C that overlap a specified time range in the DCP */
88 std::list<boost::shared_ptr<Piece> >
89 overlaps (DCPTime from, DCPTime to)
91 if (!_have_valid_pieces) {
95 std::list<boost::shared_ptr<Piece> > overlaps;
96 for (typename std::list<boost::shared_ptr<Piece> >::const_iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
97 if (!boost::dynamic_pointer_cast<C> ((*i)->content)) {
101 if ((*i)->content->position() <= to && (*i)->content->end() >= from) {
102 overlaps.push_back (*i);
109 boost::shared_ptr<const Film> _film;
110 boost::shared_ptr<const Playlist> _playlist;
112 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
113 bool _have_valid_pieces;
114 std::list<boost::shared_ptr<Piece> > _pieces;
116 /** Size of the image in the DCP (e.g. 1990x1080 for flat) */
117 dcp::Size _video_container_size;
118 boost::shared_ptr<Image> _black_image;
120 /** true if the player should ignore all video; i.e. never produce any */
122 /** true if the player should ignore all audio; i.e. never produce any */
124 /** true if the player should always burn subtitles into the video regardless
127 bool _always_burn_subtitles;
128 /** true if we should try to be fast rather than high quality */
131 boost::shared_ptr<AudioProcessor> _audio_processor;
133 boost::signals2::scoped_connection _film_changed_connection;
134 boost::signals2::scoped_connection _playlist_changed_connection;
135 boost::signals2::scoped_connection _playlist_content_changed_connection;