Basics of DCP import.

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diff --git a/src/lib/dcp_decoder.h b/src/lib/dcp_decoder.h
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+++ b/src/lib/dcp_decoder.h
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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 "video_decoder.h"
+#include "audio_decoder.h"
+#include "subtitle_decoder.h"
+
+namespace dcp {
+	class Reel;
+}
+
+class DCPContent;
+class Log;
+
+class DCPDecoder : public VideoDecoder, public AudioDecoder, public SubtitleDecoder
+{
+public:
+	DCPDecoder (boost::shared_ptr<const DCPContent>, boost::shared_ptr<Log>);
+
+private:
+	void seek (ContentTime t, bool accurate);
+	bool pass ();
+	std::list<ContentTimePeriod> subtitles_during (ContentTimePeriod, bool starting) const;
+
+	ContentTime _next;
+	std::list<boost::shared_ptr<dcp::Reel> > _reels;
+	std::list<boost::shared_ptr<dcp::Reel> >::iterator _reel;
+	boost::shared_ptr<Log> _log;
+	boost::shared_ptr<const DCPContent> _dcp_content;
+};