2 Copyright (C) 2013-2020 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 "atmos_metadata.h"
25 #include "player_text.h"
26 #include "active_text.h"
27 #include "content_text.h"
30 #include "content_atmos.h"
31 #include "position_image.h"
33 #include "content_video.h"
34 #include "content_audio.h"
35 #include "audio_stream.h"
36 #include "audio_merger.h"
38 #include <boost/shared_ptr.hpp>
39 #include <boost/enable_shared_from_this.hpp>
40 #include <boost/atomic.hpp>
55 class ReferencedReelAsset;
61 static int const VIDEO_CONTAINER_SIZE;
62 static int const PLAYLIST;
63 static int const FILM_CONTAINER;
64 static int const FILM_VIDEO_FRAME_RATE;
65 static int const DCP_DECODE_REDUCTION;
66 static int const PLAYBACK_LENGTH;
70 * @brief A class which can play a Playlist.
72 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
75 Player (boost::shared_ptr<const Film>);
76 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist> playlist);
80 void seek (dcpomatic::DCPTime time, bool accurate);
82 std::list<boost::shared_ptr<dcpomatic::Font> > get_subtitle_fonts ();
83 std::list<ReferencedReelAsset> get_reel_assets ();
84 dcp::Size video_container_size () const {
85 boost::mutex::scoped_lock lm (_mutex);
86 return _video_container_size;
89 void set_video_container_size (dcp::Size);
90 void set_ignore_video ();
91 void set_ignore_audio ();
92 void set_ignore_text ();
93 void set_always_burn_open_subtitles ();
95 void set_play_referenced ();
96 void set_dcp_decode_reduction (boost::optional<int> reduction);
98 boost::optional<dcpomatic::DCPTime> content_time_to_dcp (boost::shared_ptr<Content> content, dcpomatic::ContentTime t);
100 boost::signals2::signal<void (ChangeType, int, bool)> Change;
102 /** Emitted when a video frame is ready. These emissions happen in the correct order. */
103 boost::signals2::signal<void (boost::shared_ptr<PlayerVideo>, dcpomatic::DCPTime)> Video;
104 boost::signals2::signal<void (boost::shared_ptr<AudioBuffers>, dcpomatic::DCPTime, int)> Audio;
105 /** Emitted when a text is ready. This signal may be emitted considerably
106 * after the corresponding Video.
108 boost::signals2::signal<void (PlayerText, TextType, boost::optional<DCPTextTrack>, dcpomatic::DCPTimePeriod)> Text;
109 boost::signals2::signal<void (boost::shared_ptr<const dcp::AtmosFrame>, dcpomatic::DCPTime, AtmosMetadata)> Atmos;
112 friend class PlayerWrapper;
114 friend struct player_time_calculation_test1;
115 friend struct player_time_calculation_test2;
116 friend struct player_time_calculation_test3;
117 friend struct player_subframe_test;
118 friend struct empty_test1;
119 friend struct empty_test2;
120 friend struct check_reuse_old_data_test;
123 void setup_pieces ();
124 void setup_pieces_unlocked ();
125 std::vector<ContentList> coalesce (ContentList const& content) const;
127 void film_change (ChangeType, Film::Property);
128 void playlist_change (ChangeType);
129 void playlist_content_change (ChangeType, int, bool);
130 boost::shared_ptr<PlayerVideo> black_player_video_frame (Eyes eyes) const;
132 void video (boost::weak_ptr<Piece>, ContentVideo);
133 void audio (boost::weak_ptr<Piece>, AudioStreamPtr, ContentAudio);
134 void bitmap_text_start (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, ContentBitmapText);
135 void plain_text_start (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, ContentStringText);
136 void text_stop (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, dcpomatic::ContentTime);
137 void atmos (boost::weak_ptr<Piece>, ContentAtmos);
139 dcpomatic::DCPTime one_video_frame () const;
140 void fill_audio (dcpomatic::DCPTimePeriod period);
141 std::pair<boost::shared_ptr<AudioBuffers>, dcpomatic::DCPTime> discard_audio (
142 boost::shared_ptr<const AudioBuffers> audio, dcpomatic::DCPTime time, dcpomatic::DCPTime discard_to
144 boost::optional<PositionImage> open_subtitles_for_frame (dcpomatic::DCPTime time) const;
145 void emit_video (boost::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
146 void do_emit_video (boost::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
147 void emit_audio (boost::shared_ptr<AudioBuffers> data, dcpomatic::DCPTime time);
148 boost::shared_ptr<const Playlist> playlist () const;
150 /** Mutex to protect the whole Player state. When it's used for the preview we have
151 seek() and pass() called from the Butler thread and lots of other stuff called
154 mutable boost::mutex _mutex;
156 boost::shared_ptr<const Film> _film;
157 /** Playlist, or 0 if we are using the one from the _film */
158 boost::shared_ptr<const Playlist> _playlist;
160 /** > 0 if we are suspended (i.e. pass() and seek() do nothing) */
161 boost::atomic<int> _suspended;
162 std::list<boost::shared_ptr<Piece> > _pieces;
164 /** Size of the image we are rendering to; this may be the DCP frame size, or
165 * the size of preview in a window.
167 dcp::Size _video_container_size;
168 boost::shared_ptr<Image> _black_image;
170 /** true if the player should ignore all video; i.e. never produce any */
173 /** true if the player should ignore all text; i.e. never produce any */
175 bool _always_burn_open_subtitles;
176 /** true if we should try to be fast rather than high quality */
178 /** true if we should keep going in the face of `survivable' errors */
180 /** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
181 bool _play_referenced;
183 /** Time just after the last video frame we emitted, or the time of the last accurate seek */
184 boost::optional<dcpomatic::DCPTime> _last_video_time;
185 boost::optional<Eyes> _last_video_eyes;
186 /** Time just after the last audio frame we emitted, or the time of the last accurate seek */
187 boost::optional<dcpomatic::DCPTime> _last_audio_time;
189 boost::optional<int> _dcp_decode_reduction;
191 typedef std::map<boost::weak_ptr<Piece>, boost::shared_ptr<PlayerVideo> > LastVideoMap;
192 LastVideoMap _last_video;
194 AudioMerger _audio_merger;
196 std::list<std::pair<boost::shared_ptr<PlayerVideo>, dcpomatic::DCPTime> > _delay;
201 ActiveText _active_texts[TEXT_COUNT];
202 boost::shared_ptr<AudioProcessor> _audio_processor;
204 dcpomatic::DCPTime _playback_length;
206 boost::signals2::scoped_connection _film_changed_connection;
207 boost::signals2::scoped_connection _playlist_change_connection;
208 boost::signals2::scoped_connection _playlist_content_change_connection;