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diff --git a/src/engine/MidiDriver.hpp b/src/engine/MidiDriver.hpp
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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef MIDIDRIVER_H
+#define MIDIDRIVER_H
+
+#include <iostream>
+#include "types.hpp"
+#include "Driver.hpp"
+#include "EventBuffer.hpp"
+#include "ProcessContext.hpp"
+
+namespace Ingen {
+
+class ProcessContext;
+
+
+/** Midi driver abstract base class.
+ *
+ * \ingroup engine
+ */
+class MidiDriver : public Driver
+{
+public:
+	MidiDriver() : Driver(DataType::EVENT) {}
+
+	/** Prepare input for the specified (upcoming) cycle.
+	 *
+	 * Realtime safe, run in audio thread before executing the graph for a cycle.
+	 */
+	virtual void pre_process(ProcessContext& context) = 0;
+	
+	/** Prepare output for the specified (just completed) cycle.
+	 *
+	 * Realtime safe, run in audio thread after executing the graph for a cycle.
+	 */
+	virtual void post_process(ProcessContext& context) = 0;
+};
+
+
+
+/** Dummy MIDIDriver.
+ *
+ * Not abstract, all functions are dummies.  One of these will be allocated and
+ * "used" if no working MIDI driver is loaded.  (Doing it this way as opposed to
+ * just making MidiDriver have dummy functions makes sure any existing MidiDriver
+ * derived class actually implements the required functions).
+ *
+ * \ingroup engine
+ */
+class DummyMidiDriver : public MidiDriver
+{
+public:
+	DummyMidiDriver() {
+		std::cout << "[DummyMidiDriver] Started Dummy MIDI driver." << std::endl;
+	}
+	
+	~DummyMidiDriver() {}
+
+	void activate()   {}
+	void deactivate() {}
+	
+	bool is_activated() const { return false; }
+	bool is_enabled()   const { return false; }
+	
+	void enable()  {}
+	void disable() {}
+	
+	DriverPort* create_port(DuplexPort* patch_port) { return NULL; }
+	
+	DriverPort* driver_port(const Raul::Path& path) { return NULL; }
+	
+	DriverPort* new_port(DuplexPort* patch_port) { return NULL; }
+	
+	void        add_port(DriverPort* port) {}
+	DriverPort* remove_port(const Raul::Path& path) { return NULL; }
+	
+	void pre_process(ProcessContext& context) {}
+	void post_process(ProcessContext& context) {}
+};
+
+
+
+} // namespace Ingen
+
+#endif // MIDIDRIVER_H