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/*
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 "film.h"
#include "job.h"
#include "player.h"
#include "subtitle_film_encoder.h"
#include <dcp/filesystem.h>
#include <dcp/interop_text_asset.h>
#include <dcp/smpte_text_asset.h>
#include <fmt/format.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
/** @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{} here is to be added to an export filename to indicate
/// which reel it is. Preserve the {}; it will be replaced with the reel number.
filename /= fmt::format("{}_reel{}", initial_name, i + 1);
} else {
filename /= initial_name;
}
}
_assets.push_back(make_pair(shared_ptr<dcp::TextAsset>(), 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::InteropTextAsset>();
s->set_movie_title (_film->name());
s->set_reel_number(fmt::to_string(reel + 1));
i.first = s;
} else {
auto s = make_shared<dcp::SMPTETextAsset>();
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::TextAsset> asset;
auto const lang = _film->open_text_languages();
if (_film->interop ()) {
auto s = make_shared<dcp::InteropTextAsset>();
s->set_movie_title (_film->name());
if (lang.first) {
s->set_language(lang.first->as_string());
}
s->set_reel_number(fmt::to_string(_reel_index + 1));
_assets[_reel_index].first = s;
} else {
auto s = make_shared<dcp::SMPTETextAsset>();
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::TextString>(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;
}
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