Don't bother with audio in the film viewer.
[dcpomatic.git] / src / lib / player.h
1 /*
2     Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
3
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.
8
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.
13
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.
17
18 */
19
20 #ifndef DCPOMATIC_PLAYER_H
21 #define DCPOMATIC_PLAYER_H
22
23 #include "player_subtitles.h"
24 #include "film.h"
25 #include "content.h"
26 #include "position_image.h"
27 #include "piece.h"
28 #include <boost/shared_ptr.hpp>
29 #include <boost/enable_shared_from_this.hpp>
30 #include <list>
31
32 class PlayerVideo;
33 class Playlist;
34 class Font;
35 class AudioBuffers;
36
37 /** @class Player
38  *  @brief A class which can `play' a Playlist.
39  */
40 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
41 {
42 public:
43         Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist> playlist);
44
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 ();
49
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);
55
56         /** Emitted when something has changed such that if we went back and emitted
57          *  the last frame again it would look different.  This is not emitted after
58          *  a seek.
59          *
60          *  The parameter is true if these signals are currently likely to be frequent.
61          */
62         boost::signals2::signal<void (bool)> Changed;
63
64 private:
65         friend class PlayerWrapper;
66         friend class Piece;
67         friend struct player_overlaps_test;
68         friend struct player_time_calculation_test1;
69         friend struct player_time_calculation_test2;
70         friend struct player_time_calculation_test3;
71
72         void setup_pieces ();
73         void flush ();
74         void film_changed (Film::Property);
75         void playlist_changed ();
76         void playlist_content_changed (boost::weak_ptr<Content>, int, bool);
77         std::list<PositionImage> transform_image_subtitles (std::list<ImageSubtitle>) const;
78         void update_subtitle_from_text ();
79         Frame dcp_to_content_video (boost::shared_ptr<const Piece> piece, DCPTime t) const;
80         DCPTime content_video_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
81         Frame dcp_to_resampled_audio (boost::shared_ptr<const Piece> piece, DCPTime t) const;
82         ContentTime dcp_to_content_subtitle (boost::shared_ptr<const Piece> piece, DCPTime t) const;
83         boost::shared_ptr<PlayerVideo> black_player_video_frame (DCPTime) const;
84
85         /** @return Pieces of content type C that overlap a specified time range in the DCP */
86         template<class C>
87         std::list<boost::shared_ptr<Piece> >
88         overlaps (DCPTime from, DCPTime to)
89         {
90                 if (!_have_valid_pieces) {
91                         setup_pieces ();
92                 }
93
94                 std::list<boost::shared_ptr<Piece> > overlaps;
95                 for (typename std::list<boost::shared_ptr<Piece> >::const_iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
96                         if (!boost::dynamic_pointer_cast<C> ((*i)->content)) {
97                                 continue;
98                         }
99
100                         if ((*i)->content->position() <= to && (*i)->content->end() >= from) {
101                                 overlaps.push_back (*i);
102                         }
103                 }
104
105                 return overlaps;
106         }
107
108         boost::shared_ptr<const Film> _film;
109         boost::shared_ptr<const Playlist> _playlist;
110
111         /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
112         bool _have_valid_pieces;
113         std::list<boost::shared_ptr<Piece> > _pieces;
114
115         /** Size of the image in the DCP (e.g. 1990x1080 for flat) */
116         dcp::Size _video_container_size;
117         boost::shared_ptr<Image> _black_image;
118
119         /** true if the player should ignore all video; i.e. never produce any */
120         bool _ignore_video;
121         /** true if the player should ignore all audio; i.e. never produce any */
122         bool _ignore_audio;
123         /** true if the player should always burn subtitles into the video regardless
124             of content settings
125         */
126         bool _always_burn_subtitles;
127
128         boost::shared_ptr<AudioProcessor> _audio_processor;
129
130         boost::signals2::scoped_connection _film_changed_connection;
131         boost::signals2::scoped_connection _playlist_changed_connection;
132         boost::signals2::scoped_connection _playlist_content_changed_connection;
133 };
134
135 #endif