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Diffstat (limited to 'src/lib/subtitle_film_encoder.cc')
| -rw-r--r-- | src/lib/subtitle_film_encoder.cc | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/lib/subtitle_film_encoder.cc b/src/lib/subtitle_film_encoder.cc new file mode 100644 index 000000000..93ccc177b --- /dev/null +++ b/src/lib/subtitle_film_encoder.cc @@ -0,0 +1,204 @@ +/* + Copyright (C) 2019-2021 Carl Hetherington <cth@carlh.net> + + This file is part of DCP-o-matic. + + DCP-o-matic is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + DCP-o-matic is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>. + +*/ + + +#include "compose.hpp" +#include "film.h" +#include "job.h" +#include "player.h" +#include "subtitle_film_encoder.h" +#include <dcp/filesystem.h> +#include <dcp/interop_subtitle_asset.h> +#include <dcp/raw_convert.h> +#include <dcp/smpte_subtitle_asset.h> +#include <boost/filesystem.hpp> +#include <boost/bind/bind.hpp> + +#include "i18n.h" + + +using std::make_pair; +using std::make_shared; +using std::pair; +using std::shared_ptr; +using std::string; +using std::vector; +using boost::optional; +#if BOOST_VERSION >= 106100 +using namespace boost::placeholders; +#endif +using dcp::raw_convert; + + +/** @param output Directory, if there will be multiple output files, or a filename. + * @param initial_name Hint that may be used to create filenames, if @ref output is a directory. + * @param include_font true to refer to and export any font file (for Interop; ignored for SMPTE). + */ +SubtitleFilmEncoder::SubtitleFilmEncoder(shared_ptr<const Film> film, shared_ptr<Job> job, boost::filesystem::path output, string initial_name, bool split_reels, bool include_font) + : FilmEncoder(film, job) + , _split_reels (split_reels) + , _include_font (include_font) + , _reel_index (0) + , _length (film->length()) +{ + _player.set_play_referenced(); + _player.set_ignore_video(); + _player.set_ignore_audio(); + _player.Text.connect(boost::bind(&SubtitleFilmEncoder::text, this, _1, _2, _3, _4)); + + string const extension = film->interop() ? ".xml" : ".mxf"; + + int const files = split_reels ? film->reels().size() : 1; + for (int i = 0; i < files; ++i) { + + boost::filesystem::path filename = output; + if (dcp::filesystem::is_directory(filename)) { + if (files > 1) { + /// TRANSLATORS: _reel%1 here is to be added to an export filename to indicate + /// which reel it is. Preserve the %1; it will be replaced with the reel number. + filename /= String::compose("%1_reel%2", initial_name, i + 1); + } else { + filename /= initial_name; + } + } + + _assets.push_back(make_pair(shared_ptr<dcp::SubtitleAsset>(), dcp::filesystem::change_extension(filename, extension))); + } + + for (auto i: film->reels()) { + _reels.push_back (i); + } + + _default_font = dcp::ArrayData (default_font_file()); +} + + +void +SubtitleFilmEncoder::go() +{ + { + shared_ptr<Job> job = _job.lock (); + DCPOMATIC_ASSERT (job); + job->sub (_("Extracting")); + } + + _reel_index = 0; + + while (!_player.pass()) {} + + int reel = 0; + for (auto& i: _assets) { + if (!i.first) { + /* No subtitles arrived for this asset; make an empty one so we write something to the output */ + if (_film->interop()) { + auto s = make_shared<dcp::InteropSubtitleAsset>(); + s->set_movie_title (_film->name()); + s->set_reel_number (raw_convert<string>(reel + 1)); + i.first = s; + } else { + auto s = make_shared<dcp::SMPTESubtitleAsset>(); + s->set_content_title_text (_film->name()); + s->set_reel_number (reel + 1); + i.first = s; + } + } + + if (!_film->interop() || _include_font) { + for (auto j: _player.get_subtitle_fonts()) { + i.first->add_font(j->id(), j->data().get_value_or(_default_font)); + } + } + + i.first->write (i.second); + ++reel; + } +} + + +void +SubtitleFilmEncoder::text(PlayerText subs, TextType type, optional<DCPTextTrack> track, dcpomatic::DCPTimePeriod period) +{ + if (type != TextType::OPEN_SUBTITLE) { + return; + } + + if (!_assets[_reel_index].first) { + shared_ptr<dcp::SubtitleAsset> asset; + auto lang = _film->subtitle_languages (); + if (_film->interop ()) { + auto s = make_shared<dcp::InteropSubtitleAsset>(); + s->set_movie_title (_film->name()); + if (lang.first) { + s->set_language (lang.first->to_string()); + } + s->set_reel_number (raw_convert<string>(_reel_index + 1)); + _assets[_reel_index].first = s; + } else { + auto s = make_shared<dcp::SMPTESubtitleAsset>(); + s->set_content_title_text (_film->name()); + if (lang.first) { + s->set_language (*lang.first); + } else if (track->language) { + s->set_language (track->language.get()); + } + s->set_edit_rate (dcp::Fraction (_film->video_frame_rate(), 1)); + s->set_reel_number (_reel_index + 1); + s->set_time_code_rate (_film->video_frame_rate()); + s->set_start_time (dcp::Time()); + if (_film->encrypted ()) { + s->set_key (_film->key ()); + } + _assets[_reel_index].first = s; + } + } + + for (auto i: subs.string) { + /* XXX: couldn't / shouldn't we use period here rather than getting time from the subtitle? */ + i.set_in (i.in()); + i.set_out (i.out()); + if (_film->interop() && !_include_font) { + i.unset_font (); + } + _assets[_reel_index].first->add (make_shared<dcp::SubtitleString>(i)); + } + + if (_split_reels && (_reel_index < int(_reels.size()) - 1) && period.from > _reels[_reel_index].from) { + ++_reel_index; + } + + _last = period.from; + + auto job = _job.lock (); + if (job) { + job->set_progress (float(period.from.get()) / _length.get()); + } +} + + +Frame +SubtitleFilmEncoder::frames_done() const +{ + if (!_last) { + return 0; + } + + /* XXX: assuming 24fps here but I don't think it matters */ + return _last->seconds() * 24; +} |