Basics of DCP subtitle import.

1 files changed, 82 insertions, 0 deletions

diff --git a/src/lib/dcp_subtitle_decoder.cc b/src/lib/dcp_subtitle_decoder.cc
new file mode 100644
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+++ b/src/lib/dcp_subtitle_decoder.cc
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+/*
+    Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <dcp/subtitle_content.h>
+#include "dcp_subtitle_decoder.h"
+#include "dcp_subtitle_content.h"
+
+using std::list;
+using boost::shared_ptr;
+
+DCPSubtitleDecoder::DCPSubtitleDecoder (shared_ptr<const DCPSubtitleContent> content)
+	: SubtitleDecoder (content)
+{
+	dcp::SubtitleContent c (content->path (0), false);
+	_subtitles = c.subtitles ();
+	_next = _subtitles.begin ();
+}
+
+void
+DCPSubtitleDecoder::seek (ContentTime time, bool accurate)
+{
+	SubtitleDecoder::seek (time, accurate);
+
+	_next = _subtitles.begin ();
+	list<dcp::SubtitleString>::const_iterator i = _subtitles.begin ();
+	while (i != _subtitles.end() && ContentTime::from_seconds (_next->in().to_seconds()) < time) {
+		++i;
+	}
+}
+
+bool
+DCPSubtitleDecoder::pass ()
+{
+	if (_next == _subtitles.end ()) {
+		return true;
+	}
+
+	list<dcp::SubtitleString> s;
+	s.push_back (*_next);
+	text_subtitle (s);
+	++_next;
+	
+	return false;
+}
+
+list<ContentTimePeriod>
+DCPSubtitleDecoder::subtitles_during (ContentTimePeriod p, bool starting) const
+{
+	/* XXX: inefficient */
+
+	list<ContentTimePeriod> d;
+
+	for (list<dcp::SubtitleString>::const_iterator i = _subtitles.begin(); i != _subtitles.end(); ++i) {
+		ContentTimePeriod period (
+			ContentTime::from_seconds (i->in().to_seconds ()),
+			ContentTime::from_seconds (i->out().to_seconds ())
+			);
+		
+		if ((starting && p.contains (period.from)) || (!starting && p.overlaps (period))) {
+			d.push_back (period);
+		}
+	}
+
+	return d;
+}
+