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/*
Copyright (C) 2017-2018 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 "active_subtitles.h"
#include "piece.h"
#include "subtitle_content.h"
#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>
using std::list;
using std::pair;
using std::make_pair;
using boost::weak_ptr;
using boost::shared_ptr;
using boost::optional;
/** Get the subtitles that should be burnt into a given period.
* @param period Period of interest.
* @param always_burn_subtitles Always burn subtitles even if their content is not set to burn.
*/
list<PlayerSubtitles>
ActiveSubtitles::get_burnt (DCPTimePeriod period, bool always_burn_subtitles) const
{
list<PlayerSubtitles> ps;
for (Map::const_iterator i = _data.begin(); i != _data.end(); ++i) {
shared_ptr<Piece> piece = i->first.lock ();
if (!piece) {
continue;
}
if (!piece->content->subtitle->use() || (!always_burn_subtitles && !piece->content->subtitle->burn())) {
/* Not burning this piece */
continue;
}
BOOST_FOREACH (Period j, i->second) {
DCPTimePeriod test (j.from, j.to.get_value_or(DCPTime::max()));
optional<DCPTimePeriod> overlap = period.overlap (test);
if (overlap && overlap->duration() > DCPTime(period.duration().get() / 2)) {
ps.push_back (j.subs);
}
}
}
return ps;
}
/** Remove subtitles that finish before a given time from our list.
* @param time Time to remove before.
*/
void
ActiveSubtitles::clear_before (DCPTime time)
{
Map updated;
for (Map::const_iterator i = _data.begin(); i != _data.end(); ++i) {
list<Period> as;
BOOST_FOREACH (Period j, i->second) {
if (!j.to || j.to.get() >= time) {
as.push_back (j);
}
}
if (!as.empty ()) {
updated[i->first] = as;
}
}
_data = updated;
}
/** Add a new subtitle with a from time.
* @param piece Piece that the subtitle is from.
* @param ps Subtitles.
* @param from From time for these subtitles.
*/
void
ActiveSubtitles::add_from (weak_ptr<Piece> piece, PlayerSubtitles ps, DCPTime from)
{
if (_data.find(piece) == _data.end()) {
_data[piece] = list<Period>();
}
_data[piece].push_back (Period (ps, from));
}
/** Add the to time for the last subtitle added from a piece.
* @param piece Piece that the subtitle is from.
* @param to To time for the last subtitle submitted to add_from for this piece.
* @return Return the corresponding subtitles and their from time.
*/
pair<PlayerSubtitles, DCPTime>
ActiveSubtitles::add_to (weak_ptr<Piece> piece, DCPTime to)
{
DCPOMATIC_ASSERT (_data.find(piece) != _data.end());
_data[piece].back().to = to;
BOOST_FOREACH (SubtitleString& i, _data[piece].back().subs.text) {
i.set_out (dcp::Time(to.seconds(), 1000));
}
return make_pair (_data[piece].back().subs, _data[piece].back().from);
}
/** @param piece A piece.
* @return true if we have any active subtitles from this piece.
*/
bool
ActiveSubtitles::have (weak_ptr<Piece> piece) const
{
Map::const_iterator i = _data.find(piece);
if (i == _data.end()) {
return false;
}
return !i->second.empty();
}
void
ActiveSubtitles::clear ()
{
_data.clear ();
}
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