Pass fonts from content around as FontData.
[dcpomatic.git] / src / lib / dcp_encoder.cc
1 /*
2     Copyright (C) 2012-2020 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 /** @file  src/dcp_encoder.cc
22  *  @brief A class which takes a Film and some Options, then uses those to encode the film into a DCP.
23  *
24  *  A decoder is selected according to the content type, and the encoder can be specified
25  *  as a parameter to the constructor.
26  */
27
28 #include "dcp_encoder.h"
29 #include "j2k_encoder.h"
30 #include "film.h"
31 #include "video_decoder.h"
32 #include "audio_decoder.h"
33 #include "player.h"
34 #include "job.h"
35 #include "writer.h"
36 #include "compose.hpp"
37 #include "referenced_reel_asset.h"
38 #include "text_content.h"
39 #include "player_video.h"
40 #include <boost/signals2.hpp>
41 #include <boost/foreach.hpp>
42 #include <iostream>
43
44 #include "i18n.h"
45
46 using std::string;
47 using std::cout;
48 using std::list;
49 using std::vector;
50 using boost::shared_ptr;
51 using boost::weak_ptr;
52 using boost::dynamic_pointer_cast;
53 using boost::optional;
54 #if BOOST_VERSION >= 106100
55 using namespace boost::placeholders;
56 #endif
57 using namespace dcpomatic;
58
59 /** Construct a DCP encoder.
60  *  @param film Film that we are encoding.
61  *  @param job Job that this encoder is being used in.
62  */
63 DCPEncoder::DCPEncoder (shared_ptr<const Film> film, weak_ptr<Job> job)
64         : Encoder (film, job)
65         , _finishing (false)
66         , _non_burnt_subtitles (false)
67 {
68         _player_video_connection = _player->Video.connect (bind (&DCPEncoder::video, this, _1, _2));
69         _player_audio_connection = _player->Audio.connect (bind (&DCPEncoder::audio, this, _1, _2));
70         _player_text_connection = _player->Text.connect (bind (&DCPEncoder::text, this, _1, _2, _3, _4));
71         _player_atmos_connection = _player->Atmos.connect (bind (&DCPEncoder::atmos, this, _1, _2, _3));
72
73         BOOST_FOREACH (shared_ptr<const Content> c, film->content ()) {
74                 BOOST_FOREACH (shared_ptr<TextContent> i, c->text) {
75                         if (i->use() && !i->burn()) {
76                                 _non_burnt_subtitles = true;
77                         }
78                 }
79         }
80 }
81
82 DCPEncoder::~DCPEncoder ()
83 {
84         /* We must stop receiving more video data before we die */
85         _player_video_connection.release ();
86         _player_audio_connection.release ();
87         _player_text_connection.release ();
88         _player_atmos_connection.release ();
89 }
90
91 void
92 DCPEncoder::go ()
93 {
94         _writer.reset (new Writer (_film, _job));
95         _writer->start ();
96
97         _j2k_encoder.reset (new J2KEncoder (_film, _writer));
98         _j2k_encoder->begin ();
99
100         {
101                 shared_ptr<Job> job = _job.lock ();
102                 DCPOMATIC_ASSERT (job);
103                 job->sub (_("Encoding"));
104         }
105
106         if (_non_burnt_subtitles) {
107                 vector<FontData> fonts = _player->get_subtitle_fonts ();
108
109                 if (fonts.size() > 1 && _film->interop()) {
110                         /* Interop will ignore second and subsequent <LoadFont>s so don't even
111                            write them as they upset some validators.
112                         */
113                         FontData first = fonts.front ();
114                         fonts.clear ();
115                         fonts.push_back (first);
116                 }
117
118                 _writer->write (fonts);
119         }
120
121         while (!_player->pass ()) {}
122
123         BOOST_FOREACH (ReferencedReelAsset i, _player->get_reel_assets ()) {
124                 _writer->write (i);
125         }
126
127         _finishing = true;
128         _j2k_encoder->end ();
129         _writer->finish (_film->dir(_film->dcp_name()));
130 }
131
132 void
133 DCPEncoder::video (shared_ptr<PlayerVideo> data, DCPTime time)
134 {
135         if (!_film->three_d()) {
136                 if (data->eyes() == EYES_LEFT) {
137                         /* Use left-eye images for both eyes... */
138                         data->set_eyes (EYES_BOTH);
139                 } else if (data->eyes() == EYES_RIGHT) {
140                         /* ...and discard the right */
141                         return;
142                 }
143         }
144
145         _j2k_encoder->encode (data, time);
146 }
147
148 void
149 DCPEncoder::audio (shared_ptr<AudioBuffers> data, DCPTime time)
150 {
151         _writer->write (data, time);
152
153         shared_ptr<Job> job = _job.lock ();
154         DCPOMATIC_ASSERT (job);
155         job->set_progress (float(time.get()) / _film->length().get());
156 }
157
158 void
159 DCPEncoder::text (PlayerText data, TextType type, optional<DCPTextTrack> track, DCPTimePeriod period)
160 {
161         if (type == TEXT_CLOSED_CAPTION || _non_burnt_subtitles) {
162                 _writer->write (data, type, track, period);
163         }
164 }
165
166
167 void
168 DCPEncoder::atmos (shared_ptr<const dcp::AtmosFrame> data, DCPTime time, AtmosMetadata metadata)
169 {
170         _writer->write (data, time, metadata);
171 }
172
173
174 optional<float>
175 DCPEncoder::current_rate () const
176 {
177         if (!_j2k_encoder) {
178                 return optional<float>();
179         }
180
181         return _j2k_encoder->current_encoding_rate ();
182 }
183
184 Frame
185 DCPEncoder::frames_done () const
186 {
187         if (!_j2k_encoder) {
188                 return 0;
189         }
190
191         return _j2k_encoder->video_frames_enqueued ();
192 }