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diff --git a/src/mxf.h b/src/mxf.h
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+/*
+    Copyright (C) 2012-2014 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.
+
+*/
+
+#ifndef LIBDCP_MXF_H
+#define LIBDCP_MXF_H
+
+#include "content.h"
+#include "key.h"
+#include "metadata.h"
+#include <boost/signals2.hpp>
+
+namespace ASDCP {
+	class AESEncContext;
+	class AESDecContext;
+}
+
+/* Undefine some stuff that the OS X 10.5 SDK defines */
+#undef Key
+#undef set_key
+
+namespace dcp
+{
+
+class MXFMetadata;	
+
+/** @class MXF
+ *  @brief Parent class for classes which represent MXF files.
+ */
+class MXF : public Content
+{
+public:
+	MXF (Fraction edit_rate);
+	MXF (boost::filesystem::path file);
+	~MXF ();
+
+	/** @return the 4-character key type for this MXF (MDIK, MDAK, etc.) */
+	virtual std::string key_type () const = 0;
+	
+	bool equals (
+		boost::shared_ptr<const Content> other,
+		EqualityOptions opt,
+		boost::function<void (NoteType, std::string)> note
+		) const;
+
+	/** Fill in a ADSCP::WriteInfo struct.
+	 *  @param w struct to fill in.
+	 *  @param standard INTEROP or SMPTE.
+	 */
+	void fill_writer_info (ASDCP::WriterInfo* w, Standard standard);
+
+	/** @return true if the data is encrypted */
+	bool encrypted () const {
+		return !_key_id.empty ();
+	}
+
+	/** Set the ID of the key that is used for encryption/decryption.
+	 *  @param i key ID.
+	 */
+	void set_key_id (std::string i) {
+		_key_id = i;
+	}
+
+	/** @return the ID of the key used for encryption/decryption, or an empty string */
+	std::string key_id () const {
+		return _key_id;
+	}
+
+	void set_key (Key);
+
+	/** @return encryption/decryption key, if one has been set */
+	boost::optional<Key> key () const {
+		return _key;
+	}
+
+	/** @return encryption context, set up with any key that has been passed to set_key() */
+	ASDCP::AESEncContext* encryption_context () const {
+		return _encryption_context;
+	}
+
+	/** Set the metadata that is written to the MXF file.
+	 *  @param m Metadata.
+	 */
+	void set_metadata (MXFMetadata m) {
+		_metadata = m;
+	}
+
+	/** @return metadata from the MXF file */
+	MXFMetadata metadata () const {
+		return _metadata;
+	}
+
+protected:
+	std::string pkl_type (Standard standard) const;
+	void read_writer_info (ASDCP::WriterInfo const &);
+	
+	ASDCP::AESEncContext* _encryption_context;
+	ASDCP::AESDecContext* _decryption_context;
+	/** ID of the key used for encryption/decryption, or an empty string */
+	std::string _key_id;
+	/** Key used for encryption/decryption, if there is one */
+	boost::optional<Key> _key;
+	MXFMetadata _metadata;
+};
+
+}
+
+#endif