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diff --git a/src/lib/playlist.h b/src/lib/playlist.h
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+/*
+    Copyright (C) 2013 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.
+
+*/
+
+#ifndef DCPOMATIC_PLAYLIST_H
+#define DCPOMATIC_PLAYLIST_H
+
+#include <list>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include "ffmpeg_content.h"
+#include "audio_mapping.h"
+
+class Content;
+class FFmpegContent;
+class FFmpegDecoder;
+class StillImageMagickContent;
+class StillImageMagickDecoder;
+class SndfileContent;
+class SndfileDecoder;
+class Job;
+class Film;
+class Region;
+
+/** @class Playlist
+ *  @brief A set of content files (video and audio), with knowledge of how they should be arranged into
+ *  a DCP.
+ *
+ * This class holds Content objects, and it knows how they should be arranged.
+ */
+
+struct ContentSorter
+{
+	bool operator() (boost::shared_ptr<Content> a, boost::shared_ptr<Content> b);
+};
+
+class Playlist : public boost::noncopyable
+{
+public:
+	Playlist ();
+	~Playlist ();
+
+	void as_xml (xmlpp::Node *);
+	void set_from_xml (boost::shared_ptr<const Film>, boost::shared_ptr<const cxml::Node>);
+
+	void add (boost::shared_ptr<Content>);
+	void remove (boost::shared_ptr<Content>);
+	void remove (ContentList);
+
+	bool has_subtitles () const;
+
+	ContentList content () const;
+
+	std::string video_identifier () const;
+
+	Time length () const;
+	
+	int best_dcp_frame_rate () const;
+	Time video_end () const;
+
+	void set_sequence_video (bool);
+	void maybe_sequence_video ();
+
+	void repeat (ContentList, int);
+
+	mutable boost::signals2::signal<void ()> Changed;
+	/** Third parameter is true if signals are currently being emitted frequently */
+	mutable boost::signals2::signal<void (boost::weak_ptr<Content>, int, bool)> ContentChanged;
+	
+private:
+	void content_changed (boost::weak_ptr<Content>, int, bool);
+	void reconnect ();
+
+	ContentList _content;
+	bool _sequence_video;
+	bool _sequencing_video;
+	std::list<boost::signals2::connection> _content_connections;
+};
+
+#endif