2 Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #ifndef DCPOMATIC_PLAYER_H
22 #define DCPOMATIC_PLAYER_H
24 #include "player_subtitles.h"
25 #include "active_subtitles.h"
28 #include "position_image.h"
30 #include "content_video.h"
31 #include "content_audio.h"
32 #include "content_subtitle.h"
33 #include "audio_stream.h"
34 #include "audio_merger.h"
35 #include <boost/shared_ptr.hpp>
36 #include <boost/enable_shared_from_this.hpp>
47 class ReferencedReelAsset;
50 * @brief A class which can `play' a Playlist.
52 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
55 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist> playlist);
58 void seek (DCPTime time, bool accurate);
60 std::list<boost::shared_ptr<Font> > get_subtitle_fonts ();
61 std::list<ReferencedReelAsset> get_reel_assets ();
63 void set_video_container_size (dcp::Size);
64 void set_ignore_video ();
65 void set_always_burn_subtitles (bool burn);
67 void set_play_referenced ();
69 /** Emitted when something has changed such that if we went back and emitted
70 * the last frame again it would look different. This is not emitted after
73 * The parameter is true if these signals are currently likely to be frequent.
75 boost::signals2::signal<void (bool)> Changed;
77 boost::signals2::signal<void (boost::shared_ptr<PlayerVideo>, DCPTime)> Video;
78 boost::signals2::signal<void (boost::shared_ptr<AudioBuffers>, DCPTime)> Audio;
79 /** Emitted when a subtitle is ready. This signal may be emitted considerably
80 * after the corresponding Video.
82 boost::signals2::signal<void (PlayerSubtitles, DCPTimePeriod)> Subtitle;
85 friend class PlayerWrapper;
87 friend struct player_time_calculation_test1;
88 friend struct player_time_calculation_test2;
89 friend struct player_time_calculation_test3;
93 void film_changed (Film::Property);
94 void playlist_changed ();
95 void playlist_content_changed (boost::weak_ptr<Content>, int, bool);
96 std::list<PositionImage> transform_image_subtitles (std::list<ImageSubtitle>) const;
97 Frame dcp_to_content_video (boost::shared_ptr<const Piece> piece, DCPTime t) const;
98 DCPTime content_video_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
99 Frame dcp_to_resampled_audio (boost::shared_ptr<const Piece> piece, DCPTime t) const;
100 DCPTime resampled_audio_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
101 ContentTime dcp_to_content_time (boost::shared_ptr<const Piece> piece, DCPTime t) const;
102 DCPTime content_time_to_dcp (boost::shared_ptr<const Piece> piece, ContentTime t) const;
103 boost::shared_ptr<PlayerVideo> black_player_video_frame () const;
104 void video (boost::weak_ptr<Piece>, ContentVideo);
105 void audio (boost::weak_ptr<Piece>, AudioStreamPtr, ContentAudio);
106 void image_subtitle_start (boost::weak_ptr<Piece>, ContentImageSubtitle);
107 void text_subtitle_start (boost::weak_ptr<Piece>, ContentTextSubtitle);
108 void subtitle_stop (boost::weak_ptr<Piece>, ContentTime);
109 DCPTime one_video_frame () const;
110 void fill_audio (DCPTimePeriod period);
111 void audio_transform (boost::shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time);
112 std::pair<boost::shared_ptr<AudioBuffers>, DCPTime> discard_audio (
113 boost::shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to
115 boost::optional<PositionImage> subtitles_for_frame (DCPTime time) const;
116 void emit_video (boost::shared_ptr<PlayerVideo> pv, DCPTime time);
117 void emit_audio (boost::shared_ptr<AudioBuffers> data, DCPTime time);
119 boost::shared_ptr<const Film> _film;
120 boost::shared_ptr<const Playlist> _playlist;
122 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
123 bool _have_valid_pieces;
124 std::list<boost::shared_ptr<Piece> > _pieces;
126 /** Size of the image in the DCP (e.g. 1990x1080 for flat) */
127 dcp::Size _video_container_size;
128 boost::shared_ptr<Image> _black_image;
130 /** true if the player should ignore all video; i.e. never produce any */
132 /** true if the player should ignore all audio; i.e. never produce any */
134 /** true if the player should always burn subtitles into the video regardless
137 bool _always_burn_subtitles;
138 /** true if we should try to be fast rather than high quality */
140 /** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
141 bool _play_referenced;
143 /** Time just after the last video frame we emitted, or the time of the last accurate seek */
144 boost::optional<DCPTime> _last_video_time;
145 /** Time just after the last audio frame we emitted, or the time of the last accurate seek */
146 boost::optional<DCPTime> _last_audio_time;
148 typedef std::map<boost::weak_ptr<Piece>, boost::shared_ptr<PlayerVideo> > LastVideoMap;
149 LastVideoMap _last_video;
151 AudioMerger _audio_merger;
158 StreamState (boost::shared_ptr<Piece> p, DCPTime l)
163 boost::shared_ptr<Piece> piece;
164 DCPTime last_push_end;
166 std::map<AudioStreamPtr, StreamState> _stream_states;
168 std::list<DCPTimePeriod> _no_video;
169 std::list<DCPTimePeriod> _no_audio;
171 ActiveSubtitles _active_subtitles;
172 boost::shared_ptr<AudioProcessor> _audio_processor;
174 boost::signals2::scoped_connection _film_changed_connection;
175 boost::signals2::scoped_connection _playlist_changed_connection;
176 boost::signals2::scoped_connection _playlist_content_changed_connection;