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/*
Copyright (C) 2014-2018 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 "dcp_subtitle_decoder.h"
#include "dcp_subtitle_content.h"
#include <dcp/interop_subtitle_asset.h>
#include <iostream>
using std::list;
using std::cout;
using boost::shared_ptr;
using boost::dynamic_pointer_cast;
using boost::bind;
DCPSubtitleDecoder::DCPSubtitleDecoder (shared_ptr<const Film> film, shared_ptr<const DCPSubtitleContent> content)
: Decoder (film)
{
shared_ptr<dcp::SubtitleAsset> c (load (content->path (0)));
_subtitles = c->subtitles ();
_next = _subtitles.begin ();
ContentTime first;
if (_next != _subtitles.end()) {
first = content_time_period(*_next).from;
}
text.push_back (shared_ptr<TextDecoder> (new TextDecoder (this, content->only_text(), first)));
}
void
DCPSubtitleDecoder::seek (ContentTime time, bool accurate)
{
Decoder::seek (time, accurate);
_next = _subtitles.begin ();
list<shared_ptr<dcp::Subtitle> >::const_iterator i = _subtitles.begin ();
while (i != _subtitles.end() && ContentTime::from_seconds ((*_next)->in().as_seconds()) < time) {
++i;
}
}
bool
DCPSubtitleDecoder::pass ()
{
if (_next == _subtitles.end ()) {
return true;
}
/* Gather all subtitles with the same time period that are next
on the list. We must emit all subtitles for the same time
period with the same emit*() call otherwise the
TextDecoder will assume there is nothing else at the
time of emitting the first.
*/
list<dcp::SubtitleString> s;
list<dcp::SubtitleImage> i;
ContentTimePeriod const p = content_time_period (*_next);
while (_next != _subtitles.end () && content_time_period (*_next) == p) {
shared_ptr<dcp::SubtitleString> ns = dynamic_pointer_cast<dcp::SubtitleString>(*_next);
if (ns) {
s.push_back (*ns);
++_next;
} else {
/* XXX: perhaps these image subs should also be collected together like the string ones are;
this would need to be done both here and in DCPDecoder.
*/
shared_ptr<dcp::SubtitleImage> ni = dynamic_pointer_cast<dcp::SubtitleImage>(*_next);
if (ni) {
emit_subtitle_image (p, *ni, film()->frame_size(), only_text());
++_next;
}
}
}
only_text()->emit_plain (p, s);
return false;
}
ContentTimePeriod
DCPSubtitleDecoder::content_time_period (shared_ptr<dcp::Subtitle> s) const
{
return ContentTimePeriod (
ContentTime::from_seconds (s->in().as_seconds ()),
ContentTime::from_seconds (s->out().as_seconds ())
);
}
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