Missed update to private test repo version.
[dcpomatic.git] / src / lib / subtitle_encoder.cc
1 /*
2     Copyright (C) 2019-2021 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
22 #include "compose.hpp"
23 #include "job.h"
24 #include "player.h"
25 #include "subtitle_encoder.h"
26 #include <dcp/interop_subtitle_asset.h>
27 #include <dcp/raw_convert.h>
28 #include <dcp/smpte_subtitle_asset.h>
29 #include <boost/filesystem.hpp>
30 #include <boost/bind/bind.hpp>
31
32 #include "i18n.h"
33
34
35 using std::make_pair;
36 using std::make_shared;
37 using std::pair;
38 using std::shared_ptr;
39 using std::string;
40 using std::vector;
41 using boost::optional;
42 #if BOOST_VERSION >= 106100
43 using namespace boost::placeholders;
44 #endif
45 using dcp::raw_convert;
46
47
48 /** @param output Directory, if there will be multiple output files, or a filename.
49  *  @param initial_name Hint that may be used to create filenames, if @ref output is a directory.
50  *  @param include_font true to refer to and export any font file (for Interop; ignored for SMPTE).
51  */
52 SubtitleEncoder::SubtitleEncoder (shared_ptr<const Film> film, shared_ptr<Job> job, boost::filesystem::path output, string initial_name, bool split_reels, bool include_font)
53         : Encoder (film, job)
54         , _split_reels (split_reels)
55         , _include_font (include_font)
56         , _reel_index (0)
57         , _length (film->length())
58 {
59         _player->set_play_referenced ();
60         _player->set_ignore_video ();
61         _player->set_ignore_audio ();
62         _player->Text.connect (boost::bind(&SubtitleEncoder::text, this, _1, _2, _3, _4));
63
64         string const extension = film->interop() ? ".xml" : ".mxf";
65
66         int const files = split_reels ? film->reels().size() : 1;
67         for (int i = 0; i < files; ++i) {
68
69                 boost::filesystem::path filename = output;
70                 if (boost::filesystem::is_directory(filename)) {
71                         if (files > 1) {
72                                 /// TRANSLATORS: _reel%1 here is to be added to an export filename to indicate
73                                 /// which reel it is.  Preserve the %1; it will be replaced with the reel number.
74                                 filename /= String::compose("%1_reel%2", initial_name, i + 1);
75                         } else {
76                                 filename /= initial_name;
77                         }
78                 }
79
80                 _assets.push_back (make_pair(shared_ptr<dcp::SubtitleAsset>(), boost::filesystem::change_extension(filename, extension)));
81         }
82
83         for (auto i: film->reels()) {
84                 _reels.push_back (i);
85         }
86
87         _default_font = dcp::ArrayData (default_font_file());
88 }
89
90
91 void
92 SubtitleEncoder::go ()
93 {
94         {
95                 shared_ptr<Job> job = _job.lock ();
96                 DCPOMATIC_ASSERT (job);
97                 job->sub (_("Extracting"));
98         }
99
100         _reel_index = 0;
101
102         while (!_player->pass()) {}
103
104         int reel = 0;
105         for (auto& i: _assets) {
106                 if (!i.first) {
107                         /* No subtitles arrived for this asset; make an empty one so we write something to the output */
108                         if (_film->interop()) {
109                                 auto s = make_shared<dcp::InteropSubtitleAsset>();
110                                 s->set_movie_title (_film->name());
111                                 s->set_reel_number (raw_convert<string>(reel + 1));
112                                 i.first = s;
113                         } else {
114                                 auto s = make_shared<dcp::SMPTESubtitleAsset>();
115                                 s->set_content_title_text (_film->name());
116                                 s->set_reel_number (reel + 1);
117                                 i.first = s;
118                         }
119                 }
120
121                 if (!_film->interop() || _include_font) {
122                         for (auto j: _player->get_subtitle_fonts()) {
123                                 i.first->add_font(j->id(), j->data().get_value_or(_default_font));
124                         }
125                 }
126
127                 i.first->write (i.second);
128                 ++reel;
129         }
130 }
131
132
133 void
134 SubtitleEncoder::text (PlayerText subs, TextType type, optional<DCPTextTrack> track, dcpomatic::DCPTimePeriod period)
135 {
136         if (type != TextType::OPEN_SUBTITLE) {
137                 return;
138         }
139
140         if (!_assets[_reel_index].first) {
141                 shared_ptr<dcp::SubtitleAsset> asset;
142                 auto lang = _film->subtitle_languages ();
143                 if (_film->interop ()) {
144                         auto s = make_shared<dcp::InteropSubtitleAsset>();
145                         s->set_movie_title (_film->name());
146                         if (lang.first) {
147                                 s->set_language (lang.first->to_string());
148                         }
149                         s->set_reel_number (raw_convert<string>(_reel_index + 1));
150                         _assets[_reel_index].first = s;
151                 } else {
152                         auto s = make_shared<dcp::SMPTESubtitleAsset>();
153                         s->set_content_title_text (_film->name());
154                         if (lang.first) {
155                                 s->set_language (*lang.first);
156                         } else if (track->language) {
157                                 s->set_language (track->language.get());
158                         }
159                         s->set_edit_rate (dcp::Fraction (_film->video_frame_rate(), 1));
160                         s->set_reel_number (_reel_index + 1);
161                         s->set_time_code_rate (_film->video_frame_rate());
162                         s->set_start_time (dcp::Time());
163                         if (_film->encrypted ()) {
164                                 s->set_key (_film->key ());
165                         }
166                         _assets[_reel_index].first = s;
167                 }
168         }
169
170         for (auto i: subs.string) {
171                 /* XXX: couldn't / shouldn't we use period here rather than getting time from the subtitle? */
172                 i.set_in  (i.in());
173                 i.set_out (i.out());
174                 if (_film->interop() && !_include_font) {
175                         i.unset_font ();
176                 }
177                 _assets[_reel_index].first->add (make_shared<dcp::SubtitleString>(i));
178         }
179
180         if (_split_reels && (_reel_index < int(_reels.size()) - 1) && period.from > _reels[_reel_index].from) {
181                 ++_reel_index;
182         }
183
184         _last = period.from;
185
186         auto job = _job.lock ();
187         if (job) {
188                 job->set_progress (float(period.from.get()) / _length.get());
189         }
190 }
191
192
193 Frame
194 SubtitleEncoder::frames_done () const
195 {
196         if (!_last) {
197                 return 0;
198         }
199
200         /* XXX: assuming 24fps here but I don't think it matters */
201         return _last->seconds() * 24;
202 }