2 Copyright (C) 2013-2019 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_text.h"
25 #include "active_text.h"
26 #include "content_text.h"
29 #include "position_image.h"
31 #include "content_video.h"
32 #include "content_audio.h"
33 #include "audio_stream.h"
34 #include "audio_merger.h"
36 #include <boost/shared_ptr.hpp>
37 #include <boost/enable_shared_from_this.hpp>
38 #include <boost/atomic.hpp>
52 class ReferencedReelAsset;
58 static int const VIDEO_CONTAINER_SIZE;
59 static int const PLAYLIST;
60 static int const FILM_CONTAINER;
61 static int const FILM_VIDEO_FRAME_RATE;
62 static int const DCP_DECODE_REDUCTION;
63 static int const PLAYBACK_LENGTH;
67 * @brief A class which can play a Playlist.
69 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
72 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist> playlist, dcpomatic::DCPTime playback_length);
76 void seek (dcpomatic::DCPTime time, bool accurate);
78 std::list<boost::shared_ptr<dcpomatic::Font> > get_subtitle_fonts ();
79 std::list<ReferencedReelAsset> get_reel_assets ();
80 dcp::Size video_container_size () const {
81 boost::mutex::scoped_lock lm (_mutex);
82 return _video_container_size;
85 void set_playback_length (dcpomatic::DCPTime len);
86 void set_video_container_size (dcp::Size);
87 void set_ignore_video ();
88 void set_ignore_audio ();
89 void set_ignore_text ();
90 void set_always_burn_open_subtitles ();
92 void set_play_referenced ();
93 void set_dcp_decode_reduction (boost::optional<int> reduction);
95 boost::optional<dcpomatic::DCPTime> content_time_to_dcp (boost::shared_ptr<Content> content, dcpomatic::ContentTime t);
97 boost::signals2::signal<void (ChangeType, int, bool)> Change;
99 /** Emitted when a video frame is ready. These emissions happen in the correct order. */
100 boost::signals2::signal<void (boost::shared_ptr<PlayerVideo>, dcpomatic::DCPTime)> Video;
101 boost::signals2::signal<void (boost::shared_ptr<AudioBuffers>, dcpomatic::DCPTime, int)> Audio;
102 /** Emitted when a text is ready. This signal may be emitted considerably
103 * after the corresponding Video.
105 boost::signals2::signal<void (PlayerText, TextType, boost::optional<DCPTextTrack>, dcpomatic::DCPTimePeriod)> Text;
108 friend class PlayerWrapper;
110 friend struct player_time_calculation_test1;
111 friend struct player_time_calculation_test2;
112 friend struct player_time_calculation_test3;
113 friend struct player_subframe_test;
114 friend struct empty_test1;
115 friend struct empty_test2;
116 friend struct check_reuse_old_data_test;
118 void setup_pieces ();
119 void setup_pieces_unlocked ();
121 void film_change (ChangeType, Film::Property);
122 void playlist_change (ChangeType);
123 void playlist_content_change (ChangeType, int, bool);
124 Frame dcp_to_content_video (boost::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
125 dcpomatic::DCPTime content_video_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
126 Frame dcp_to_resampled_audio (boost::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
127 dcpomatic::DCPTime resampled_audio_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
128 dcpomatic::ContentTime dcp_to_content_time (boost::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
129 dcpomatic::DCPTime content_time_to_dcp (boost::shared_ptr<const Piece> piece, dcpomatic::ContentTime t) const;
130 boost::shared_ptr<PlayerVideo> black_player_video_frame (Eyes eyes) const;
131 void video (boost::weak_ptr<Piece>, ContentVideo);
132 void audio (boost::weak_ptr<Piece>, AudioStreamPtr, ContentAudio);
133 void bitmap_text_start (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, ContentBitmapText);
134 void plain_text_start (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, ContentStringText);
135 void subtitle_stop (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, dcpomatic::ContentTime);
136 dcpomatic::DCPTime one_video_frame () const;
137 void fill_audio (dcpomatic::DCPTimePeriod period);
138 std::pair<boost::shared_ptr<AudioBuffers>, dcpomatic::DCPTime> discard_audio (
139 boost::shared_ptr<const AudioBuffers> audio, dcpomatic::DCPTime time, dcpomatic::DCPTime discard_to
141 boost::optional<PositionImage> open_subtitles_for_frame (dcpomatic::DCPTime time) const;
142 void emit_video (boost::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
143 void do_emit_video (boost::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
144 void emit_audio (boost::shared_ptr<AudioBuffers> data, dcpomatic::DCPTime time);
146 /** Mutex to protect the whole Player state. When it's used for the preview we have
147 seek() and pass() called from the Butler thread and lots of other stuff called
150 mutable boost::mutex _mutex;
152 boost::shared_ptr<const Film> _film;
153 boost::shared_ptr<const Playlist> _playlist;
155 /** > 0 if we are suspended (i.e. pass() and seek() do nothing) */
156 boost::atomic<int> _suspended;
157 std::list<boost::shared_ptr<Piece> > _pieces;
159 /** Size of the image in the DCP (e.g. 1990x1080 for flat) */
160 dcp::Size _video_container_size;
161 boost::shared_ptr<Image> _black_image;
163 /** true if the player should ignore all video; i.e. never produce any */
166 /** true if the player should ignore all text; i.e. never produce any */
168 bool _always_burn_open_subtitles;
169 /** true if we should try to be fast rather than high quality */
171 /** true if we should keep going in the face of `survivable' errors */
173 /** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
174 bool _play_referenced;
176 /** Time just after the last video frame we emitted, or the time of the last accurate seek */
177 boost::optional<dcpomatic::DCPTime> _last_video_time;
178 boost::optional<Eyes> _last_video_eyes;
179 /** Time just after the last audio frame we emitted, or the time of the last accurate seek */
180 boost::optional<dcpomatic::DCPTime> _last_audio_time;
182 boost::optional<int> _dcp_decode_reduction;
184 typedef std::map<boost::weak_ptr<Piece>, boost::shared_ptr<PlayerVideo> > LastVideoMap;
185 LastVideoMap _last_video;
187 AudioMerger _audio_merger;
189 std::list<std::pair<boost::shared_ptr<PlayerVideo>, dcpomatic::DCPTime> > _delay;
196 StreamState (boost::shared_ptr<Piece> p, dcpomatic::DCPTime l)
201 boost::shared_ptr<Piece> piece;
202 dcpomatic::DCPTime last_push_end;
204 std::map<AudioStreamPtr, StreamState> _stream_states;
209 ActiveText _active_texts[TEXT_COUNT];
210 boost::shared_ptr<AudioProcessor> _audio_processor;
212 dcpomatic::DCPTime _playback_length;
214 boost::signals2::scoped_connection _film_changed_connection;
215 boost::signals2::scoped_connection _playlist_change_connection;
216 boost::signals2::scoped_connection _playlist_content_change_connection;