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/atomic.hpp>
53 class ReferencedReelAsset;
59 static int const VIDEO_CONTAINER_SIZE;
60 static int const PLAYLIST;
61 static int const FILM_CONTAINER;
62 static int const FILM_VIDEO_FRAME_RATE;
63 static int const DCP_DECODE_REDUCTION;
64 static int const PLAYBACK_LENGTH;
68 * @brief A class which can play a Playlist.
70 class Player : public std::enable_shared_from_this<Player>
73 Player (std::shared_ptr<const Film>);
74 Player (std::shared_ptr<const Film>, std::shared_ptr<const Playlist> playlist);
77 Player (Player const& Player) = delete;
78 Player& operator= (Player const& Player) = delete;
81 void seek (dcpomatic::DCPTime time, bool accurate);
83 std::vector<dcpomatic::FontData> get_subtitle_fonts ();
84 std::list<ReferencedReelAsset> get_reel_assets ();
85 dcp::Size video_container_size () const {
86 boost::mutex::scoped_lock lm (_mutex);
87 return _video_container_size;
90 void set_video_container_size (dcp::Size);
91 void set_ignore_video ();
92 void set_ignore_audio ();
93 void set_ignore_text ();
94 void set_always_burn_open_subtitles ();
96 void set_play_referenced ();
97 void set_dcp_decode_reduction (boost::optional<int> reduction);
99 boost::optional<dcpomatic::DCPTime> content_time_to_dcp (std::shared_ptr<Content> content, dcpomatic::ContentTime t);
101 boost::signals2::signal<void (ChangeType, int, bool)> Change;
103 /** Emitted when a video frame is ready. These emissions happen in the correct order. */
104 boost::signals2::signal<void (std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime)> Video;
105 /** Emitted when audio data is ready. First parameter is the audio data, second its time,
106 * third the frame rate.
108 boost::signals2::signal<void (std::shared_ptr<AudioBuffers>, dcpomatic::DCPTime, int)> Audio;
109 /** Emitted when a text is ready. This signal may be emitted considerably
110 * after the corresponding Video.
112 boost::signals2::signal<void (PlayerText, TextType, boost::optional<DCPTextTrack>, dcpomatic::DCPTimePeriod)> Text;
113 boost::signals2::signal<void (std::shared_ptr<const dcp::AtmosFrame>, dcpomatic::DCPTime, AtmosMetadata)> Atmos;
116 friend class PlayerWrapper;
118 friend struct player_time_calculation_test1;
119 friend struct player_time_calculation_test2;
120 friend struct player_time_calculation_test3;
121 friend struct player_subframe_test;
122 friend struct empty_test1;
123 friend struct empty_test2;
124 friend struct check_reuse_old_data_test;
125 friend struct overlap_video_test1;
128 void setup_pieces ();
129 void setup_pieces_unlocked ();
131 void film_change (ChangeType, Film::Property);
132 void playlist_change (ChangeType);
133 void playlist_content_change (ChangeType, int, bool);
134 std::shared_ptr<PlayerVideo> black_player_video_frame (Eyes eyes) const;
136 void video (std::weak_ptr<Piece>, ContentVideo);
137 void audio (std::weak_ptr<Piece>, AudioStreamPtr, ContentAudio);
138 void bitmap_text_start (std::weak_ptr<Piece>, std::weak_ptr<const TextContent>, ContentBitmapText);
139 void plain_text_start (std::weak_ptr<Piece>, std::weak_ptr<const TextContent>, ContentStringText);
140 void subtitle_stop (std::weak_ptr<Piece>, std::weak_ptr<const TextContent>, dcpomatic::ContentTime);
141 void atmos (std::weak_ptr<Piece>, ContentAtmos);
143 dcpomatic::DCPTime one_video_frame () const;
144 void fill_audio (dcpomatic::DCPTimePeriod period);
145 std::pair<std::shared_ptr<AudioBuffers>, dcpomatic::DCPTime> discard_audio (
146 std::shared_ptr<const AudioBuffers> audio, dcpomatic::DCPTime time, dcpomatic::DCPTime discard_to
148 boost::optional<PositionImage> open_subtitles_for_frame (dcpomatic::DCPTime time) const;
149 void emit_video (std::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
150 void do_emit_video (std::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
151 void emit_audio (std::shared_ptr<AudioBuffers> data, dcpomatic::DCPTime time);
152 std::shared_ptr<const Playlist> playlist () const;
154 /** Mutex to protect the whole Player state. When it's used for the preview we have
155 seek() and pass() called from the Butler thread and lots of other stuff called
158 mutable boost::mutex _mutex;
160 std::shared_ptr<const Film> _film;
161 /** Playlist, or 0 if we are using the one from the _film */
162 std::shared_ptr<const Playlist> _playlist;
164 /** > 0 if we are suspended (i.e. pass() and seek() do nothing) */
165 boost::atomic<int> _suspended;
166 std::list<std::shared_ptr<Piece> > _pieces;
168 /** Size of the image we are rendering to; this may be the DCP frame size, or
169 * the size of preview in a window.
171 dcp::Size _video_container_size;
172 std::shared_ptr<Image> _black_image;
174 /** true if the player should ignore all video; i.e. never produce any */
175 bool _ignore_video = false;
176 bool _ignore_audio = false;
177 /** true if the player should ignore all text; i.e. never produce any */
178 bool _ignore_text = false;
179 bool _always_burn_open_subtitles = false;
180 /** true if we should try to be fast rather than high quality */
182 /** true if we should keep going in the face of `survivable' errors */
183 bool _tolerant = false;
184 /** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
185 bool _play_referenced = false;
187 /** Time just after the last video frame we emitted, or the time of the last accurate seek */
188 boost::optional<dcpomatic::DCPTime> _last_video_time;
189 boost::optional<Eyes> _last_video_eyes;
190 /** Time just after the last audio frame we emitted, or the time of the last accurate seek */
191 boost::optional<dcpomatic::DCPTime> _last_audio_time;
193 boost::optional<int> _dcp_decode_reduction;
195 typedef std::map<std::weak_ptr<Piece>, std::shared_ptr<PlayerVideo>, std::owner_less<std::weak_ptr<Piece>>> LastVideoMap;
196 LastVideoMap _last_video;
198 AudioMerger _audio_merger;
199 Shuffler* _shuffler = nullptr;
200 std::list<std::pair<std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime> > _delay;
205 ActiveText _active_texts[static_cast<int>(TextType::COUNT)];
206 std::shared_ptr<AudioProcessor> _audio_processor;
208 dcpomatic::DCPTime _playback_length;
210 boost::signals2::scoped_connection _film_changed_connection;
211 boost::signals2::scoped_connection _playlist_change_connection;
212 boost::signals2::scoped_connection _playlist_content_change_connection;