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/*
Copyright (C) 2020-2021 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 "analyse_subtitles_job.h"
#include "bitmap_text.h"
#include "film.h"
#include "image.h"
#include "player.h"
#include "playlist.h"
#include "render_text.h"
#include "subtitle_analysis.h"
#include "text_content.h"
#include <iostream>
#include "i18n.h"
using std::make_shared;
using std::shared_ptr;
using std::string;
using std::weak_ptr;
#if BOOST_VERSION >= 106100
using namespace boost::placeholders;
#endif
AnalyseSubtitlesJob::AnalyseSubtitlesJob (shared_ptr<const Film> film, shared_ptr<Content> content)
: Job (film)
, _content (content)
, _path (_film->subtitle_analysis_path(content))
{
}
AnalyseSubtitlesJob::~AnalyseSubtitlesJob()
{
stop_thread();
}
string
AnalyseSubtitlesJob::name () const
{
return _("Analysing subtitles");
}
string
AnalyseSubtitlesJob::json_name () const
{
return N_("analyse_subtitles");
}
void
AnalyseSubtitlesJob::run ()
{
auto playlist = make_shared<Playlist>();
auto content = _content.lock ();
DCPOMATIC_ASSERT (content);
playlist->add (_film, content);
auto player = make_shared<Player>(_film, playlist, false);
player->set_ignore_audio ();
player->set_fast ();
player->set_play_referenced ();
player->Text.connect (bind(&AnalyseSubtitlesJob::analyse, this, _1, _2));
set_progress_unknown ();
if (!content->text.empty()) {
while (!player->pass ()) {
boost::this_thread::interruption_point();
}
}
SubtitleAnalysis analysis (_bounding_box, content->text.front()->x_offset(), content->text.front()->y_offset());
analysis.write (_path);
set_progress (1);
set_state (FINISHED_OK);
}
void
AnalyseSubtitlesJob::analyse(PlayerText const& text, TextType type)
{
if (type != TextType::OPEN_SUBTITLE) {
return;
}
for (auto const& i: text.bitmap) {
if (!_bounding_box) {
_bounding_box = i.rectangle;
} else {
_bounding_box->extend (i.rectangle);
}
}
if (text.string.empty()) {
return;
}
/* We can provide dummy values for time and frame rate here as they are only used to calculate fades */
dcp::Size const frame = _film->frame_size();
std::vector<dcp::SubtitleStandard> override_standard;
if (_film->interop()) {
/* Since the film is Interop there is only one way the vpositions in the subs can be interpreted
* (we assume).
*/
override_standard.push_back(dcp::SubtitleStandard::INTEROP);
} else {
/* We're using the great new SMPTE standard, which means there are two different ways that vposition
* could be interpreted; we will write SMPTE-2014 standard assets, but if the projection system uses
* SMPTE 20{07,10} instead they won't be placed how we intended. To show the user this, make the
* bounding rectangle enclose both possibilities.
*/
override_standard.push_back(dcp::SubtitleStandard::SMPTE_2007);
override_standard.push_back(dcp::SubtitleStandard::SMPTE_2014);
}
for (auto standard: override_standard) {
for (auto i: bounding_box(text.string, frame, standard)) {
dcpomatic::Rect<double> rect (
double(i.x) / frame.width, double(i.y) / frame.height,
double(i.width) / frame.width, double(i.height) / frame.height
);
if (!_bounding_box) {
_bounding_box = rect;
} else {
_bounding_box->extend (rect);
}
}
}
}
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