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"
37 #include "player_text.h"
38 #include "position_image.h"
40 #include <boost/atomic.hpp>
57 class ReferencedReelAsset;
63 static int const VIDEO_CONTAINER_SIZE;
64 static int const PLAYLIST;
65 static int const FILM_CONTAINER;
66 static int const FILM_VIDEO_FRAME_RATE;
67 static int const DCP_DECODE_REDUCTION;
68 static int const PLAYBACK_LENGTH;
73 * @brief A class which can play a Playlist.
75 class Player : public std::enable_shared_from_this<Player>
78 Player (std::shared_ptr<const Film>, Image::Alignment subtitle_alignment);
79 Player (std::shared_ptr<const Film>, std::shared_ptr<const Playlist> playlist);
81 Player (Player const& Player) = delete;
82 Player& operator= (Player const& Player) = delete;
85 void seek (dcpomatic::DCPTime time, bool accurate);
87 std::vector<dcpomatic::FontData> get_subtitle_fonts ();
88 std::list<ReferencedReelAsset> get_reel_assets ();
89 dcp::Size video_container_size () const {
90 boost::mutex::scoped_lock lm (_mutex);
91 return _video_container_size;
94 void set_video_container_size (dcp::Size);
95 void set_ignore_video ();
96 void set_ignore_audio ();
97 void set_ignore_text ();
98 void set_always_burn_open_subtitles ();
100 void set_play_referenced ();
101 void set_dcp_decode_reduction (boost::optional<int> reduction);
103 boost::optional<dcpomatic::DCPTime> content_time_to_dcp (std::shared_ptr<const Content> content, dcpomatic::ContentTime t);
104 boost::optional<dcpomatic::ContentTime> dcp_to_content_time (std::shared_ptr<const Content> content, dcpomatic::DCPTime t);
106 boost::signals2::signal<void (ChangeType, int, bool)> Change;
108 /** Emitted when a video frame is ready. These emissions happen in the correct order. */
109 boost::signals2::signal<void (std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime)> Video;
110 /** Emitted when audio data is ready. First parameter is the audio data, second its time,
111 * third the frame rate.
113 boost::signals2::signal<void (std::shared_ptr<AudioBuffers>, dcpomatic::DCPTime, int)> Audio;
114 /** Emitted when a text is ready. This signal may be emitted considerably
115 * after the corresponding Video.
117 boost::signals2::signal<void (PlayerText, TextType, boost::optional<DCPTextTrack>, dcpomatic::DCPTimePeriod)> Text;
118 boost::signals2::signal<void (std::shared_ptr<const dcp::AtmosFrame>, dcpomatic::DCPTime, AtmosMetadata)> Atmos;
121 friend class PlayerWrapper;
123 friend struct player_time_calculation_test1;
124 friend struct player_time_calculation_test2;
125 friend struct player_time_calculation_test3;
126 friend struct player_subframe_test;
127 friend struct empty_test1;
128 friend struct empty_test2;
129 friend struct check_reuse_old_data_test;
130 friend struct overlap_video_test1;
133 void setup_pieces ();
134 void setup_pieces_unlocked ();
135 void film_change (ChangeType, Film::Property);
136 void playlist_change (ChangeType);
137 void playlist_content_change (ChangeType, int, bool);
138 Frame dcp_to_content_video (std::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
139 dcpomatic::DCPTime content_video_to_dcp (std::shared_ptr<const Piece> piece, Frame f) const;
140 Frame dcp_to_resampled_audio (std::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
141 dcpomatic::DCPTime resampled_audio_to_dcp (std::shared_ptr<const Piece> piece, Frame f) const;
142 dcpomatic::ContentTime dcp_to_content_time (std::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
143 dcpomatic::DCPTime content_time_to_dcp (std::shared_ptr<const Piece> piece, dcpomatic::ContentTime t) const;
144 std::shared_ptr<PlayerVideo> black_player_video_frame (Eyes eyes) const;
146 void video (std::weak_ptr<Piece>, ContentVideo);
147 void audio (std::weak_ptr<Piece>, AudioStreamPtr, ContentAudio);
148 void bitmap_text_start (std::weak_ptr<Piece>, std::weak_ptr<const TextContent>, ContentBitmapText);
149 void plain_text_start (std::weak_ptr<Piece>, std::weak_ptr<const TextContent>, ContentStringText);
150 void subtitle_stop (std::weak_ptr<Piece>, std::weak_ptr<const TextContent>, dcpomatic::ContentTime);
151 void atmos (std::weak_ptr<Piece>, ContentAtmos);
153 dcpomatic::DCPTime one_video_frame () const;
154 void fill_audio (dcpomatic::DCPTimePeriod period);
155 std::pair<std::shared_ptr<AudioBuffers>, dcpomatic::DCPTime> discard_audio (
156 std::shared_ptr<const AudioBuffers> audio, dcpomatic::DCPTime time, dcpomatic::DCPTime discard_to
158 boost::optional<PositionImage> open_subtitles_for_frame (dcpomatic::DCPTime time) const;
159 void emit_video (std::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
160 void do_emit_video (std::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
161 void emit_audio (std::shared_ptr<AudioBuffers> data, dcpomatic::DCPTime time);
162 std::shared_ptr<const Playlist> playlist () const;
164 /** Mutex to protect the whole Player state. When it's used for the preview we have
165 seek() and pass() called from the Butler thread and lots of other stuff called
168 mutable boost::mutex _mutex;
170 std::shared_ptr<const Film> _film;
171 /** Playlist, or 0 if we are using the one from the _film */
172 std::shared_ptr<const Playlist> _playlist;
174 /** > 0 if we are suspended (i.e. pass() and seek() do nothing) */
175 boost::atomic<int> _suspended;
176 std::list<std::shared_ptr<Piece>> _pieces;
178 /** Size of the image we are rendering to; this may be the DCP frame size, or
179 * the size of preview in a window.
181 dcp::Size _video_container_size;
182 std::shared_ptr<Image> _black_image;
184 /** true if the player should ignore all video; i.e. never produce any */
185 bool _ignore_video = false;
186 bool _ignore_audio = false;
187 /** true if the player should ignore all text; i.e. never produce any */
188 bool _ignore_text = false;
189 bool _always_burn_open_subtitles = false;
190 /** true if we should try to be fast rather than high quality */
192 /** true if we should keep going in the face of `survivable' errors */
193 bool _tolerant = false;
194 /** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
195 bool _play_referenced = false;
197 /** Time of the next video that we will emit, or the time of the last accurate seek */
198 boost::optional<dcpomatic::DCPTime> _next_video_time;
199 /** Eyes of the next video that we will emit */
200 boost::optional<Eyes> _next_video_eyes;
201 /** Time of the next audio that we will emit, or the time of the last accurate seek */
202 boost::optional<dcpomatic::DCPTime> _next_audio_time;
204 boost::optional<int> _dcp_decode_reduction;
206 typedef std::map<std::weak_ptr<Piece>, std::shared_ptr<PlayerVideo>, std::owner_less<std::weak_ptr<Piece>>> LastVideoMap;
207 LastVideoMap _last_video;
209 AudioMerger _audio_merger;
210 std::unique_ptr<Shuffler> _shuffler;
211 std::list<std::pair<std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime>> _delay;
218 StreamState (std::shared_ptr<Piece> p, dcpomatic::DCPTime l)
223 std::shared_ptr<Piece> piece;
224 dcpomatic::DCPTime last_push_end;
226 std::map<AudioStreamPtr, StreamState> _stream_states;
231 ActiveText _active_texts[static_cast<int>(TextType::COUNT)];
232 std::shared_ptr<AudioProcessor> _audio_processor;
234 dcpomatic::DCPTime _playback_length;
236 /** Alignment for subtitle images that we create */
237 Image::Alignment _subtitle_alignment = Image::Alignment::PADDED;
239 boost::signals2::scoped_connection _film_changed_connection;
240 boost::signals2::scoped_connection _playlist_change_connection;
241 boost::signals2::scoped_connection _playlist_content_change_connection;