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/>.
22 #ifndef DCPOMATIC_PLAYER_H
23 #define DCPOMATIC_PLAYER_H
26 #include "active_text.h"
27 #include "atmos_metadata.h"
28 #include "audio_merger.h"
29 #include "audio_stream.h"
30 #include "content_atmos.h"
31 #include "content_audio.h"
32 #include "content_text.h"
33 #include "content_video.h"
35 #include "enum_indexed_vector.h"
38 #include "player_text.h"
39 #include "position_image.h"
41 #include <boost/atomic.hpp>
54 class ReferencedReelAsset;
60 static int const VIDEO_CONTAINER_SIZE;
61 static int const PLAYLIST;
62 static int const FILM_CONTAINER;
63 static int const FILM_VIDEO_FRAME_RATE;
64 static int const DCP_DECODE_REDUCTION;
65 static int const PLAYBACK_LENGTH;
70 * @brief A class which can play a Playlist.
72 class Player : public std::enable_shared_from_this<Player>
75 Player (std::shared_ptr<const Film>, Image::Alignment subtitle_alignment);
76 Player (std::shared_ptr<const Film>, std::shared_ptr<const Playlist> playlist);
78 Player (Player const& Player) = delete;
79 Player& operator= (Player const& Player) = delete;
82 void seek (dcpomatic::DCPTime time, bool accurate);
84 std::vector<std::shared_ptr<dcpomatic::Font>> get_subtitle_fonts ();
86 dcp::Size video_container_size () const {
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<const Content> content, dcpomatic::ContentTime t) const;
100 boost::optional<dcpomatic::ContentTime> dcp_to_content_time (std::shared_ptr<const Content> content, dcpomatic::DCPTime t) const;
102 boost::signals2::signal<void (ChangeType, int, bool)> Change;
104 /** Emitted when a video frame is ready. These emissions happen in the correct order. */
105 boost::signals2::signal<void (std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime)> Video;
106 /** Emitted when audio data is ready. First parameter is the audio data, second its time,
107 * third the frame rate.
109 boost::signals2::signal<void (std::shared_ptr<AudioBuffers>, dcpomatic::DCPTime, int)> Audio;
110 /** Emitted when a text is ready. This signal may be emitted considerably
111 * after the corresponding Video.
113 boost::signals2::signal<void (PlayerText, TextType, boost::optional<DCPTextTrack>, dcpomatic::DCPTimePeriod)> Text;
114 boost::signals2::signal<void (std::shared_ptr<const dcp::AtmosFrame>, dcpomatic::DCPTime, AtmosMetadata)> Atmos;
117 friend class PlayerWrapper;
119 friend struct player_time_calculation_test1;
120 friend struct player_time_calculation_test2;
121 friend struct player_time_calculation_test3;
122 friend struct player_subframe_test;
123 friend struct empty_test1;
124 friend struct empty_test2;
125 friend struct check_reuse_old_data_test;
126 friend struct overlap_video_test1;
129 void setup_pieces ();
130 void film_change (ChangeType, Film::Property);
131 void playlist_change (ChangeType);
132 void playlist_content_change (ChangeType, int, bool);
133 Frame dcp_to_content_video (std::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
134 dcpomatic::DCPTime content_video_to_dcp (std::shared_ptr<const Piece> piece, Frame f) const;
135 Frame dcp_to_resampled_audio (std::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
136 dcpomatic::DCPTime resampled_audio_to_dcp (std::shared_ptr<const Piece> piece, Frame f) const;
137 dcpomatic::ContentTime dcp_to_content_time (std::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
138 dcpomatic::DCPTime content_time_to_dcp (std::shared_ptr<const Piece> piece, dcpomatic::ContentTime t) const;
139 std::shared_ptr<PlayerVideo> black_player_video_frame (Eyes eyes) const;
140 void emit_video_until(dcpomatic::DCPTime time);
141 void insert_video(std::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time, dcpomatic::DCPTime end);
143 void video (std::weak_ptr<Piece>, ContentVideo);
144 void audio (std::weak_ptr<Piece>, AudioStreamPtr, ContentAudio);
145 void bitmap_text_start (std::weak_ptr<Piece>, std::weak_ptr<const TextContent>, ContentBitmapText);
146 void plain_text_start (std::weak_ptr<Piece>, std::weak_ptr<const TextContent>, ContentStringText);
147 void subtitle_stop (std::weak_ptr<Piece>, std::weak_ptr<const TextContent>, dcpomatic::ContentTime);
148 void atmos (std::weak_ptr<Piece>, ContentAtmos);
150 dcpomatic::DCPTime one_video_frame () const;
151 void fill_audio (dcpomatic::DCPTimePeriod period);
152 std::pair<std::shared_ptr<AudioBuffers>, dcpomatic::DCPTime> discard_audio (
153 std::shared_ptr<const AudioBuffers> audio, dcpomatic::DCPTime time, dcpomatic::DCPTime discard_to
155 boost::optional<PositionImage> open_subtitles_for_frame (dcpomatic::DCPTime time) const;
156 void emit_video(std::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
157 void use_video(std::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time, dcpomatic::DCPTime end);
158 void emit_audio (std::shared_ptr<AudioBuffers> data, dcpomatic::DCPTime time);
159 std::shared_ptr<const Playlist> playlist () const;
161 /** Mutex to protect the most of the Player state. When it's used for the preview we have
162 seek() and pass() called from the Butler thread and lots of other stuff called
165 mutable boost::mutex _mutex;
167 std::shared_ptr<const Film> const _film;
168 /** Playlist, or 0 if we are using the one from the _film */
169 std::shared_ptr<const Playlist> const _playlist;
171 /** > 0 if we are suspended (i.e. pass() and seek() do nothing) */
172 boost::atomic<int> _suspended;
173 std::list<std::shared_ptr<Piece>> _pieces;
175 /** Size of the image we are rendering to; this may be the DCP frame size, or
176 * the size of preview in a window.
178 boost::atomic<dcp::Size> _video_container_size;
180 mutable boost::mutex _black_image_mutex;
181 std::shared_ptr<Image> _black_image;
183 /** true if the player should ignore all video; i.e. never produce any */
184 boost::atomic<bool> _ignore_video;
185 boost::atomic<bool> _ignore_audio;
186 /** true if the player should ignore all text; i.e. never produce any */
187 boost::atomic<bool> _ignore_text;
188 boost::atomic<bool> _always_burn_open_subtitles;
189 /** true if we should try to be fast rather than high quality */
190 boost::atomic<bool> _fast;
191 /** true if we should keep going in the face of `survivable' errors */
192 bool const _tolerant;
193 /** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
194 boost::atomic<bool> _play_referenced;
196 /** Time of the next video that we will emit, or the time of the last accurate seek */
197 boost::optional<dcpomatic::DCPTime> _next_video_time;
198 /** Time of the next audio that we will emit, or the time of the last accurate seek */
199 boost::optional<dcpomatic::DCPTime> _next_audio_time;
201 boost::atomic<boost::optional<int>> _dcp_decode_reduction;
203 EnumIndexedVector<std::pair<std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime>, Eyes> _last_video;
205 AudioMerger _audio_merger;
206 std::unique_ptr<Shuffler> _shuffler;
207 std::list<std::pair<std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime>> _delay;
214 StreamState (std::shared_ptr<Piece> p, dcpomatic::DCPTime l)
219 std::shared_ptr<Piece> piece;
220 dcpomatic::DCPTime last_push_end;
222 std::map<AudioStreamPtr, StreamState> _stream_states;
227 EnumIndexedVector<ActiveText, TextType> _active_texts;
228 std::shared_ptr<AudioProcessor> _audio_processor;
230 boost::atomic<dcpomatic::DCPTime> _playback_length;
232 /** Alignment for subtitle images that we create */
233 Image::Alignment const _subtitle_alignment = Image::Alignment::PADDED;
235 boost::signals2::scoped_connection _film_changed_connection;
236 boost::signals2::scoped_connection _playlist_change_connection;
237 boost::signals2::scoped_connection _playlist_content_change_connection;