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diff --git a/libs/ardour/ardour/async_midi_port.h b/libs/ardour/ardour/async_midi_port.h
new file mode 100644
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+++ b/libs/ardour/ardour/async_midi_port.h
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+/*
+    Copyright (C) 1998-2010 Paul Barton-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.
+
+*/
+
+#ifndef  __libardour_async_midiport_h__
+#define  __libardour_async_midiport_h__
+
+#include <string>
+#include <iostream>
+
+#include "pbd/xml++.h"
+#include "pbd/crossthread.h"
+#include "pbd/signals.h"
+#include "pbd/ringbuffer.h"
+
+#include "evoral/Event.hpp"
+#include "evoral/EventRingBuffer.hpp"
+
+#include "midi++/types.h"
+#include "midi++/parser.h"
+#include "midi++/port.h"
+
+#include "ardour/midi_port.h"
+
+namespace ARDOUR {
+
+	class AsyncMIDIPort : public ARDOUR::MidiPort, public MIDI::Port {
+
+  public:
+        AsyncMIDIPort (std::string const &, PortFlags);
+	~AsyncMIDIPort ();
+
+        /* called from an RT context */
+
+	void cycle_start (pframes_t nframes);
+	void cycle_end (pframes_t nframes);
+    
+        /* called from non-RT context */
+    
+	void parse (framecnt_t timestamp);
+	int write (const MIDI::byte *msg, size_t msglen, MIDI::timestamp_t timestamp);
+        int read (MIDI::byte *buf, size_t bufsize);
+	void drain (int check_interval_usecs);
+	int selectable () const {
+#ifdef PLATFORM_WINDOWS
+		return false;
+#else
+		return xthread.selectable();
+#endif
+	}
+
+	static void set_process_thread (pthread_t);
+	static pthread_t get_process_thread () { return _process_thread; }
+	static bool is_process_thread();
+
+  private:	
+	bool                    _currently_in_cycle;
+        MIDI::timestamp_t       _last_write_timestamp;
+	RingBuffer< Evoral::Event<double> > output_fifo;
+        Evoral::EventRingBuffer<MIDI::timestamp_t> input_fifo;
+        Glib::Threads::Mutex output_fifo_lock;
+#ifndef PLATFORM_WINDOWS
+	CrossThreadChannel xthread;
+#endif
+
+	int create_port ();
+
+	/** Channel used to signal to the MidiControlUI that input has arrived */
+	
+	std::string _connections;
+	PBD::ScopedConnection connect_connection;
+	PBD::ScopedConnection halt_connection;
+	void flush (void* jack_port_buffer);
+	void jack_halted ();
+	void make_connections ();
+	void init (std::string const &, Flags);
+
+        void flush_output_fifo (pframes_t);
+
+	static pthread_t _process_thread;
+};
+
+} // namespace ARDOUR
+
+#endif /* __libardour_async_midiport_h__ */