2 Copyright (C) 2013-2018 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>
48 class ReferencedReelAsset;
54 static int const VIDEO_CONTAINER_SIZE;
55 static int const PLAYLIST;
56 static int const FILM_CONTAINER;
57 static int const FILM_VIDEO_FRAME_RATE;
58 static int const DCP_DECODE_REDUCTION;
62 * @brief A class which can play a Playlist.
64 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
67 Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist> playlist);
71 void seek (DCPTime time, bool accurate);
73 std::list<boost::shared_ptr<Font> > get_subtitle_fonts ();
74 std::list<ReferencedReelAsset> get_reel_assets ();
75 dcp::Size video_container_size () const {
76 boost::mutex::scoped_lock lm (_mutex);
77 return _video_container_size;
80 void set_video_container_size (dcp::Size);
81 void set_ignore_video ();
82 void set_ignore_text ();
83 void set_always_burn_open_subtitles ();
85 void set_play_referenced ();
86 void set_dcp_decode_reduction (boost::optional<int> reduction);
88 DCPTime content_time_to_dcp (boost::shared_ptr<Content> content, ContentTime t);
90 std::list<PlayerText> closed_captions_for_frame (DCPTime time) const;
92 /** Emitted when something has changed such that if we went back and emitted
93 * the last frame again it would look different. This is not emitted after
96 * The first parameter is what changed.
97 * The second parameter is true if these signals are currently likely to be frequent.
99 boost::signals2::signal<void (int, bool)> Changed;
101 /** Emitted when a video frame is ready. These emissions happen in the correct order. */
102 boost::signals2::signal<void (boost::shared_ptr<PlayerVideo>, DCPTime)> Video;
103 boost::signals2::signal<void (boost::shared_ptr<AudioBuffers>, DCPTime)> Audio;
104 /** Emitted when a text is ready. This signal may be emitted considerably
105 * after the corresponding Video.
107 boost::signals2::signal<void (PlayerText, TextType, DCPTimePeriod)> Text;
110 friend class PlayerWrapper;
112 friend struct player_time_calculation_test1;
113 friend struct player_time_calculation_test2;
114 friend struct player_time_calculation_test3;
115 friend struct player_subframe_test;
117 void setup_pieces ();
119 void film_changed (Film::Property);
120 void playlist_changed ();
121 void playlist_content_changed (boost::weak_ptr<Content>, int, bool);
122 std::list<PositionImage> transform_bitmap_texts (std::list<BitmapText>) const;
123 Frame dcp_to_content_video (boost::shared_ptr<const Piece> piece, DCPTime t) const;
124 DCPTime content_video_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
125 Frame dcp_to_resampled_audio (boost::shared_ptr<const Piece> piece, DCPTime t) const;
126 DCPTime resampled_audio_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
127 ContentTime dcp_to_content_time (boost::shared_ptr<const Piece> piece, DCPTime t) const;
128 DCPTime content_time_to_dcp (boost::shared_ptr<const Piece> piece, ContentTime t) const;
129 boost::shared_ptr<PlayerVideo> black_player_video_frame (Eyes eyes) const;
130 void video (boost::weak_ptr<Piece>, ContentVideo);
131 void audio (boost::weak_ptr<Piece>, AudioStreamPtr, ContentAudio);
132 void bitmap_text_start (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, ContentBitmapText);
133 void plain_text_start (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, ContentStringText);
134 void subtitle_stop (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, ContentTime, TextType);
135 DCPTime one_video_frame () const;
136 void fill_audio (DCPTimePeriod period);
137 std::pair<boost::shared_ptr<AudioBuffers>, DCPTime> discard_audio (
138 boost::shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to
140 boost::optional<PositionImage> open_subtitles_for_frame (DCPTime time) const;
141 void emit_video (boost::shared_ptr<PlayerVideo> pv, DCPTime time);
142 void do_emit_video (boost::shared_ptr<PlayerVideo> pv, DCPTime time);
143 void emit_audio (boost::shared_ptr<AudioBuffers> data, DCPTime time);
145 /** Mutex to protect the whole Player state. When it's used for the preview we have
146 seek() and pass() called from the Butler thread and lots of other stuff called
149 mutable boost::mutex _mutex;
151 boost::shared_ptr<const Film> _film;
152 boost::shared_ptr<const Playlist> _playlist;
154 /** Our pieces are ready to go; if this is false the pieces must be (re-)created before they are used */
155 bool _have_valid_pieces;
156 std::list<boost::shared_ptr<Piece> > _pieces;
158 /** Size of the image in the DCP (e.g. 1990x1080 for flat) */
159 dcp::Size _video_container_size;
160 boost::shared_ptr<Image> _black_image;
162 /** true if the player should ignore all video; i.e. never produce any */
164 /** true if the player should ignore all text; i.e. never produce any */
166 bool _always_burn_open_subtitles;
167 /** true if we should try to be fast rather than high quality */
169 /** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
170 bool _play_referenced;
172 /** Time just after the last video frame we emitted, or the time of the last accurate seek */
173 boost::optional<DCPTime> _last_video_time;
174 boost::optional<Eyes> _last_video_eyes;
175 /** Time just after the last audio frame we emitted, or the time of the last accurate seek */
176 boost::optional<DCPTime> _last_audio_time;
178 boost::optional<int> _dcp_decode_reduction;
180 typedef std::map<boost::weak_ptr<Piece>, boost::shared_ptr<PlayerVideo> > LastVideoMap;
181 LastVideoMap _last_video;
183 AudioMerger _audio_merger;
185 std::list<std::pair<boost::shared_ptr<PlayerVideo>, DCPTime> > _delay;
192 StreamState (boost::shared_ptr<Piece> p, DCPTime l)
197 boost::shared_ptr<Piece> piece;
198 DCPTime last_push_end;
200 std::map<AudioStreamPtr, StreamState> _stream_states;
205 ActiveText _active_texts[TEXT_COUNT];
206 boost::shared_ptr<AudioProcessor> _audio_processor;
208 boost::signals2::scoped_connection _film_changed_connection;
209 boost::signals2::scoped_connection _playlist_changed_connection;
210 boost::signals2::scoped_connection _playlist_content_changed_connection;