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diff --git a/libs/ardour/ardour/midi_port.h b/libs/ardour/ardour/midi_port.h
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+++ b/libs/ardour/ardour/midi_port.h
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+/*
+    Copyright (C) 2002 Paul Davis 
+
+    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.
+
+    $Id: port.h 712 2006-07-28 01:08:57Z drobilla $
+*/
+
+#ifndef __ardour_midi_port_h__
+#define __ardour_midi_port_h__
+
+#include <sigc++/signal.h>
+#include <pbd/failed_constructor.h>
+#include <ardour/ardour.h>
+#include <jack/jack.h>
+#include <jack/midiport.h>
+#include <ardour/port.h>
+#include <ardour/buffer.h>
+
+namespace ARDOUR {
+
+class MidiEngine;
+
+class MidiPort : public Port {
+   public:
+	virtual ~MidiPort();
+	
+	DataType type() const { return DataType(DataType::MIDI); }
+
+	MidiBuffer& get_buffer() {
+		assert(_nframes_this_cycle > 0);
+		return *_buffer;
+	}
+	
+	void cycle_start(jack_nframes_t nframes);
+	void cycle_end();
+
+	size_t capacity() { return _buffer->capacity(); }
+	size_t size()     { return _buffer->size(); }
+	
+	/** Assumes that the port is an output port */
+	void silence (jack_nframes_t nframes, jack_nframes_t offset) {
+		// FIXME: silence starting at offset..
+		_buffer->clear();
+	}
+
+  protected:
+	friend class AudioEngine;
+
+	MidiPort (jack_port_t *port);
+	
+	/* engine isn't supposed to access below here */
+
+	MidiBuffer*    _buffer;
+	jack_nframes_t _nframes_this_cycle;
+};
+ 
+} // namespace ARDOUR
+
+#endif /* __ardour_midi_port_h__ */