a4bc133f8d781c7509078d8953da7e11f2c841e5
[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 <iostream>
42
43 #include "i18n.h"
44
45 using std::string;
46 using std::cout;
47 using std::list;
48 using std::vector;
49 using std::shared_ptr;
50 using std::weak_ptr;
51 using std::dynamic_pointer_cast;
52 using std::make_shared;
53 using boost::optional;
54 #if BOOST_VERSION >= 106100
55 using namespace boost::placeholders;
56 #endif
57 using namespace dcpomatic;
58
59
60 /** Construct a DCP encoder.
61  *  @param film Film that we are encoding.
62  *  @param job Job that this encoder is being used in.
63  */
64 DCPEncoder::DCPEncoder (shared_ptr<const Film> film, weak_ptr<Job> job)
65         : Encoder (film, job)
66         , _writer(film, job)
67         , _j2k_encoder(film, _writer)
68         , _finishing (false)
69         , _non_burnt_subtitles (false)
70 {
71         _player_video_connection = _player.Video.connect(bind(&DCPEncoder::video, this, _1, _2));
72         _player_audio_connection = _player.Audio.connect(bind(&DCPEncoder::audio, this, _1, _2));
73         _player_text_connection = _player.Text.connect(bind(&DCPEncoder::text, this, _1, _2, _3, _4));
74         _player_atmos_connection = _player.Atmos.connect(bind(&DCPEncoder::atmos, this, _1, _2, _3));
75
76         for (auto c: film->content ()) {
77                 for (auto i: c->text) {
78                         if (i->use() && !i->burn()) {
79                                 _non_burnt_subtitles = true;
80                         }
81                 }
82         }
83 }
84
85 DCPEncoder::~DCPEncoder ()
86 {
87         /* We must stop receiving more video data before we die */
88         _player_video_connection.release ();
89         _player_audio_connection.release ();
90         _player_text_connection.release ();
91         _player_atmos_connection.release ();
92 }
93
94 void
95 DCPEncoder::go ()
96 {
97         _writer.start();
98         _j2k_encoder.begin();
99
100         {
101                 auto job = _job.lock ();
102                 DCPOMATIC_ASSERT (job);
103                 job->sub (_("Encoding"));
104         }
105
106         if (_non_burnt_subtitles) {
107                 _writer.write(_player.get_subtitle_fonts());
108         }
109
110         int passes = 0;
111         while (!_player.pass()) {
112                 if ((++passes % 8) == 0) {
113                         auto job = _job.lock();
114                         DCPOMATIC_ASSERT(job);
115                         job->set_progress(_player.progress());
116                 }
117         }
118
119         for (auto i: get_referenced_reel_assets(_film, _film->playlist())) {
120                 _writer.write(i);
121         }
122
123         _finishing = true;
124         _j2k_encoder.end();
125         _writer.finish(_film->dir(_film->dcp_name()));
126 }
127
128 void
129 DCPEncoder::video (shared_ptr<PlayerVideo> data, DCPTime time)
130 {
131         _j2k_encoder.encode(data, time);
132 }
133
134 void
135 DCPEncoder::audio (shared_ptr<AudioBuffers> data, DCPTime time)
136 {
137         _writer.write(data, time);
138 }
139
140 void
141 DCPEncoder::text (PlayerText data, TextType type, optional<DCPTextTrack> track, DCPTimePeriod period)
142 {
143         if (type == TextType::CLOSED_CAPTION || _non_burnt_subtitles) {
144                 _writer.write(data, type, track, period);
145         }
146 }
147
148
149 void
150 DCPEncoder::atmos (shared_ptr<const dcp::AtmosFrame> data, DCPTime time, AtmosMetadata metadata)
151 {
152         _writer.write(data, time, metadata);
153 }
154
155
156 optional<float>
157 DCPEncoder::current_rate () const
158 {
159         return _j2k_encoder.current_encoding_rate();
160 }
161
162 Frame
163 DCPEncoder::frames_done () const
164 {
165         return _player.frames_done();
166 }