Nicer fix for 86102d30bf0aad89115bbeb3d8aaa2a27a0aa432
[dcpomatic.git] / src / lib / player.h
1 /*
2     Copyright (C) 2013-2019 Carl Hetherington <cth@carlh.net>
3
4     This file is part of DCP-o-matic.
5
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.
10
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.
15
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/>.
18
19 */
20
21 #ifndef DCPOMATIC_PLAYER_H
22 #define DCPOMATIC_PLAYER_H
23
24 #include "player_text.h"
25 #include "active_text.h"
26 #include "content_text.h"
27 #include "film.h"
28 #include "content.h"
29 #include "position_image.h"
30 #include "piece.h"
31 #include "content_video.h"
32 #include "content_audio.h"
33 #include "audio_stream.h"
34 #include "audio_merger.h"
35 #include "empty.h"
36 #include <boost/shared_ptr.hpp>
37 #include <boost/enable_shared_from_this.hpp>
38 #include <boost/atomic.hpp>
39 #include <list>
40
41 namespace dcp {
42         class ReelAsset;
43 }
44
45 namespace dcpomatic {
46         class Font;
47 }
48
49 class PlayerVideo;
50 class Playlist;
51 class AudioBuffers;
52 class ReferencedReelAsset;
53 class Shuffler;
54
55 class PlayerProperty
56 {
57 public:
58         static int const VIDEO_CONTAINER_SIZE;
59         static int const PLAYLIST;
60         static int const FILM_CONTAINER;
61         static int const FILM_VIDEO_FRAME_RATE;
62         static int const DCP_DECODE_REDUCTION;
63         static int const PLAYBACK_LENGTH;
64 };
65
66 /** @class Player
67  *  @brief A class which can play a Playlist.
68  */
69 class Player : public boost::enable_shared_from_this<Player>, public boost::noncopyable
70 {
71 public:
72         Player (boost::shared_ptr<const Film>);
73         Player (boost::shared_ptr<const Film>, boost::shared_ptr<const Playlist> playlist);
74         ~Player ();
75
76         bool pass ();
77         void seek (dcpomatic::DCPTime time, bool accurate);
78
79         std::list<boost::shared_ptr<dcpomatic::Font> > get_subtitle_fonts ();
80         std::list<ReferencedReelAsset> get_reel_assets ();
81         dcp::Size video_container_size () const {
82                 boost::mutex::scoped_lock lm (_mutex);
83                 return _video_container_size;
84         }
85
86         void set_video_container_size (dcp::Size);
87         void set_ignore_video ();
88         void set_ignore_audio ();
89         void set_ignore_text ();
90         void set_always_burn_open_subtitles ();
91         void set_fast ();
92         void set_play_referenced ();
93         void set_dcp_decode_reduction (boost::optional<int> reduction);
94
95         boost::optional<dcpomatic::DCPTime> content_time_to_dcp (boost::shared_ptr<Content> content, dcpomatic::ContentTime t);
96
97         boost::signals2::signal<void (ChangeType, int, bool)> Change;
98
99         /** Emitted when a video frame is ready.  These emissions happen in the correct order. */
100         boost::signals2::signal<void (boost::shared_ptr<PlayerVideo>, dcpomatic::DCPTime)> Video;
101         boost::signals2::signal<void (boost::shared_ptr<AudioBuffers>, dcpomatic::DCPTime, int)> Audio;
102         /** Emitted when a text is ready.  This signal may be emitted considerably
103          *  after the corresponding Video.
104          */
105         boost::signals2::signal<void (PlayerText, TextType, boost::optional<DCPTextTrack>, dcpomatic::DCPTimePeriod)> Text;
106
107 private:
108         friend class PlayerWrapper;
109         friend class Piece;
110         friend struct player_time_calculation_test1;
111         friend struct player_time_calculation_test2;
112         friend struct player_time_calculation_test3;
113         friend struct player_subframe_test;
114         friend struct empty_test1;
115         friend struct empty_test2;
116         friend struct check_reuse_old_data_test;
117
118         void construct ();
119         void setup_pieces ();
120         void setup_pieces_unlocked ();
121         void flush ();
122         void film_change (ChangeType, Film::Property);
123         void playlist_change (ChangeType);
124         void playlist_content_change (ChangeType, int, bool);
125         Frame dcp_to_content_video (boost::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
126         dcpomatic::DCPTime content_video_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
127         Frame dcp_to_resampled_audio (boost::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
128         dcpomatic::DCPTime resampled_audio_to_dcp (boost::shared_ptr<const Piece> piece, Frame f) const;
129         dcpomatic::ContentTime dcp_to_content_time (boost::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
130         dcpomatic::DCPTime content_time_to_dcp (boost::shared_ptr<const Piece> piece, dcpomatic::ContentTime t) const;
131         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 subtitle_stop (boost::weak_ptr<Piece>, boost::weak_ptr<const TextContent>, dcpomatic::ContentTime);
137         dcpomatic::DCPTime one_video_frame () const;
138         void fill_audio (dcpomatic::DCPTimePeriod period);
139         std::pair<boost::shared_ptr<AudioBuffers>, dcpomatic::DCPTime> discard_audio (
140                 boost::shared_ptr<const AudioBuffers> audio, dcpomatic::DCPTime time, dcpomatic::DCPTime discard_to
141                 ) const;
142         boost::optional<PositionImage> open_subtitles_for_frame (dcpomatic::DCPTime time) const;
143         void emit_video (boost::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
144         void do_emit_video (boost::shared_ptr<PlayerVideo> pv, dcpomatic::DCPTime time);
145         void emit_audio (boost::shared_ptr<AudioBuffers> data, dcpomatic::DCPTime time);
146         boost::shared_ptr<const Playlist> playlist () const;
147
148         /** Mutex to protect the whole Player state.  When it's used for the preview we have
149             seek() and pass() called from the Butler thread and lots of other stuff called
150             from the GUI thread.
151         */
152         mutable boost::mutex _mutex;
153
154         boost::shared_ptr<const Film> _film;
155         /** Playlist, or 0 if we are using the one from the _film */
156         boost::shared_ptr<const Playlist> _playlist;
157
158         /** > 0 if we are suspended (i.e. pass() and seek() do nothing) */
159         boost::atomic<int> _suspended;
160         std::list<boost::shared_ptr<Piece> > _pieces;
161
162         /** Size of the image in the DCP (e.g. 1990x1080 for flat) */
163         dcp::Size _video_container_size;
164         boost::shared_ptr<Image> _black_image;
165
166         /** true if the player should ignore all video; i.e. never produce any */
167         bool _ignore_video;
168         bool _ignore_audio;
169         /** true if the player should ignore all text; i.e. never produce any */
170         bool _ignore_text;
171         bool _always_burn_open_subtitles;
172         /** true if we should try to be fast rather than high quality */
173         bool _fast;
174         /** true if we should keep going in the face of `survivable' errors */
175         bool _tolerant;
176         /** true if we should `play' (i.e output) referenced DCP data (e.g. for preview) */
177         bool _play_referenced;
178
179         /** Time just after the last video frame we emitted, or the time of the last accurate seek */
180         boost::optional<dcpomatic::DCPTime> _last_video_time;
181         boost::optional<Eyes> _last_video_eyes;
182         /** Time just after the last audio frame we emitted, or the time of the last accurate seek */
183         boost::optional<dcpomatic::DCPTime> _last_audio_time;
184
185         boost::optional<int> _dcp_decode_reduction;
186
187         typedef std::map<boost::weak_ptr<Piece>, boost::shared_ptr<PlayerVideo> > LastVideoMap;
188         LastVideoMap _last_video;
189
190         AudioMerger _audio_merger;
191         Shuffler* _shuffler;
192         std::list<std::pair<boost::shared_ptr<PlayerVideo>, dcpomatic::DCPTime> > _delay;
193
194         class StreamState
195         {
196         public:
197                 StreamState () {}
198
199                 StreamState (boost::shared_ptr<Piece> p, dcpomatic::DCPTime l)
200                         : piece(p)
201                         , last_push_end(l)
202                 {}
203
204                 boost::shared_ptr<Piece> piece;
205                 dcpomatic::DCPTime last_push_end;
206         };
207         std::map<AudioStreamPtr, StreamState> _stream_states;
208
209         Empty _black;
210         Empty _silent;
211
212         ActiveText _active_texts[TEXT_COUNT];
213         boost::shared_ptr<AudioProcessor> _audio_processor;
214
215         dcpomatic::DCPTime _playback_length;
216
217         boost::signals2::scoped_connection _film_changed_connection;
218         boost::signals2::scoped_connection _playlist_change_connection;
219         boost::signals2::scoped_connection _playlist_content_change_connection;
220 };
221
222 #endif