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diff --git a/libs/surfaces/generic_midi/midicontrollable.h b/libs/surfaces/generic_midi/midicontrollable.h
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+/*
+    Copyright (C) 1998-2006 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: controllable.h 4 2005-05-13 20:47:18Z taybin $
+*/
+
+#ifndef __gm_midicontrollable_h__
+#define __gm_midicontrollable_h__
+
+#include <string>
+
+#include <sigc++/sigc++.h>
+
+#include <midi++/types.h>
+#include <pbd/controllable.h>
+#include <pbd/stateful.h>
+#include <ardour/types.h>
+
+namespace MIDI {
+
+class Channel;
+class Port;
+class Parser;
+
+}
+
+class MIDIControllable : public Stateful
+{
+  public:
+	MIDIControllable (MIDI::Port&, PBD::Controllable&, bool bistate = false);
+	virtual ~MIDIControllable ();
+
+	void send_feedback ();
+	MIDI::byte* write_feedback (MIDI::byte* buf, int32_t& bufsize, bool force = false);
+	
+	void midi_rebind (MIDI::channel_t channel=-1);
+	void midi_forget ();
+	void learn_about_external_control ();
+	void stop_learning ();
+	void drop_external_control ();
+
+	sigc::signal<void> learning_started;
+	sigc::signal<void> learning_stopped;
+
+	bool get_midi_feedback () { return feedback; }
+	void set_midi_feedback (bool val) { feedback = val; }
+
+	MIDI::Port& get_port() const { return _port; }
+	PBD::Controllable& get_controllable() const { return controllable; }
+
+	std::string control_description() const { return _control_description; }
+
+	XMLNode& get_state (void);
+	int set_state (const XMLNode&);
+
+  private:
+	PBD::Controllable& controllable;
+	MIDI::Port&     _port;
+	bool             setting;
+	MIDI::byte       last_written;
+	bool             bistate;
+	int              midi_msg_id;      /* controller ID or note number */
+	sigc::connection midi_sense_connection[2];
+	sigc::connection midi_learn_connection;
+	size_t           connections;
+	MIDI::eventType  control_type;
+	MIDI::byte       control_additional;
+	MIDI::channel_t  control_channel;
+	std::string     _control_description;
+	bool             feedback;
+	
+	static bool _send_feedback;
+
+	void midi_receiver (MIDI::Parser &p, MIDI::byte *, size_t);
+	void midi_sense_note (MIDI::Parser &, MIDI::EventTwoBytes *, bool is_on);
+	void midi_sense_note_on (MIDI::Parser &p, MIDI::EventTwoBytes *tb);
+	void midi_sense_note_off (MIDI::Parser &p, MIDI::EventTwoBytes *tb);
+	void midi_sense_controller (MIDI::Parser &, MIDI::EventTwoBytes *);
+	void midi_sense_program_change (MIDI::Parser &, MIDI::byte);
+	void midi_sense_pitchbend (MIDI::Parser &, MIDI::pitchbend_t);
+
+	void bind_midi (MIDI::channel_t, MIDI::eventType, MIDI::byte);
+};
+
+#endif // __gm_midicontrollable_h__
+