add support for IP MIDI (multicast MIDI over IP UDP sockets) to ardour and use it if requested inside MCP code. required renaming the pre-existing MIDI::Port as MIDI:JackMIDIPort - MIDI::Port becomes the base type for both JackMIDIPort and IPMIDIPort

git-svn-id: svn://localhost/ardour2/branches/3.0@12069 d708f5d6-7413-0410-9779-e7cbd77b26cf

29 files changed, 1235 insertions, 818 deletions

diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc
index 5d29f35301..372581f4e6 100644
--- a/libs/ardour/audioengine.cc
+++ b/libs/ardour/audioengine.cc
@@ -34,6 +34,7 @@
 #include <jack/weakjack.h>
 
 #include "midi++/port.h"
+#include "midi++/jack_midi_port.h"
 #include "midi++/mmc.h"
 #include "midi++/manager.h"
 
@@ -133,7 +134,7 @@ _thread_init_callback (void * /*arg*/)
 
 	SessionEvent::create_per_thread_pool (X_("Audioengine"), 512);
 
-	MIDI::Port::set_process_thread (pthread_self());
+	MIDI::JackMIDIPort::set_process_thread (pthread_self());
 }
 
 static void
@@ -233,7 +234,7 @@ AudioEngine::stop (bool forever)
 		} else {
 			jack_deactivate (_priv_jack);
 			Stopped(); /* EMIT SIGNAL */
-			MIDI::Port::JackHalted (); /* EMIT SIGNAL */
+			MIDI::JackMIDIPort::JackHalted (); /* EMIT SIGNAL */
 		}
 	}
 
@@ -1106,7 +1107,7 @@ AudioEngine::halted (void *arg)
 
 	if (was_running) {
 		ae->Halted(""); /* EMIT SIGNAL */
-		MIDI::Port::JackHalted (); /* EMIT SIGNAL */
+		MIDI::JackMIDIPort::JackHalted (); /* EMIT SIGNAL */
 	}
 }
 
@@ -1356,7 +1357,7 @@ AudioEngine::disconnect_from_jack ()
 	if (_running) {
 		_running = false;
 		Stopped(); /* EMIT SIGNAL */
-		MIDI::Port::JackHalted (); /* EMIT SIGNAL */
+		MIDI::JackMIDIPort::JackHalted (); /* EMIT SIGNAL */
 	}
 
 	return 0;
diff --git a/libs/ardour/midi_ui.cc b/libs/ardour/midi_ui.cc
index 770a371457..302dce86ba 100644
--- a/libs/ardour/midi_ui.cc
+++ b/libs/ardour/midi_ui.cc
@@ -143,6 +143,8 @@ MidiControlUI::reset_ports ()
 		if ((fd = (*i)->selectable ()) >= 0) {
 			Glib::RefPtr<IOSource> psrc = IOSource::create (fd, IO_IN|IO_HUP|IO_ERR);
 
+			cerr << "MIDI UI listening to " << (*i)->name() << endl;
+
 			psrc->connect (sigc::bind (sigc::mem_fun (this, &MidiControlUI::midi_input_handler), *i));
 			psrc->attach (_main_loop->get_context());
 
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 5744b55c65..80dbd98963 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -106,6 +106,7 @@
 #include "ardour/operations.h"
 
 #include "midi++/port.h"
+#include "midi++/jack_midi_port.h"
 #include "midi++/mmc.h"
 #include "midi++/manager.h"
 
@@ -837,7 +838,7 @@ Session::hookup_io ()
 	/* Tell all IO objects to connect themselves together */
 
 	IO::enable_connecting ();
-	MIDI::Port::MakeConnections ();
+	MIDI::JackMIDIPort::MakeConnections ();
 
 	/* Now reset all panners */
 
diff --git a/libs/ardour/ticker.cc b/libs/ardour/ticker.cc
index 734b401356..5d078952a1 100644
--- a/libs/ardour/ticker.cc
+++ b/libs/ardour/ticker.cc
@@ -20,6 +20,7 @@
 #include "pbd/stacktrace.h"
 
 #include "midi++/port.h"
+#include "midi++/jack_midi_port.h"
 #include "midi++/manager.h"
 
 #include "evoral/midi_events.h"
@@ -152,13 +153,13 @@ void MidiClockTicker::tick (const framepos_t& transport_frame)
 		double next_tick = _last_tick + one_ppqn_in_frames (transport_frame);
 		frameoffset_t next_tick_offset = llrint (next_tick) - transport_frame;
 
+		MIDI::JackMIDIPort* mp = dynamic_cast<MIDI::JackMIDIPort*> (_midi_port);
+		
 		DEBUG_TRACE (PBD::DEBUG::MidiClock,
 			     string_compose ("Transport: %1, last tick time: %2, next tick time: %3, offset: %4, cycle length: %5\n",
-					     transport_frame, _last_tick, next_tick, next_tick_offset, _midi_port->nframes_this_cycle()
-				     )
-			);
+					     transport_frame, _last_tick, next_tick, next_tick_offset, mp ? mp->nframes_this_cycle() : 0));
 
-		if (next_tick_offset >= _midi_port->nframes_this_cycle()) {
+		if (!mp || (next_tick_offset >= mp->nframes_this_cycle())) {
 			break;
 		}
 
diff --git a/libs/midi++2/channel.cc b/libs/midi++2/channel.cc
index 0c9fbe39d1..66ce5ed71c 100644
--- a/libs/midi++2/channel.cc
+++ b/libs/midi++2/channel.cc
@@ -25,7 +25,7 @@
 
 using namespace MIDI;
 
-Channel::Channel (byte channelnum, PortBase &p) 
+Channel::Channel (byte channelnum, Port &p) 
 	: _port (p)
 {
 	_channel_number = channelnum;
diff --git a/libs/midi++2/ipmidi_port.cc b/libs/midi++2/ipmidi_port.cc
new file mode 100644
index 0000000000..0ef0a9952a
--- /dev/null
+++ b/libs/midi++2/ipmidi_port.cc
@@ -0,0 +1,290 @@
+/*
+    Copyright (C) 2012 Paul Davie
+    
+    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.cc 12065 2012-04-23 16:23:48Z paul $
+*/
+#include <iostream>
+#include <cstdio>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netdb.h>
+
+#if defined(WIN32)
+static WSADATA g_wsaData;
+typedef int socklen_t;
+#else
+#include <unistd.h>
+#include <sys/ioctl.h>
+inline void closesocket(int s) { ::close(s); }
+#endif
+
+#include <jack/jack.h>
+#include <jack/midiport.h>
+
+#include "pbd/xml++.h"
+#include "pbd/error.h"
+#include "pbd/failed_constructor.h"
+#include "pbd/convert.h"
+#include "pbd/compose.h"
+
+#include "midi++/types.h"
+#include "midi++/ipmidi_port.h"
+#include "midi++/channel.h"
+
+using namespace MIDI;
+using namespace std;
+using namespace PBD;
+
+IPMIDIPort::IPMIDIPort (int base_port, const string& iface)
+	: Port (string_compose ("IPmidi@%1", base_port), Port::Flags (Port::IsInput|Port::IsOutput))
+	, sockin (-1)
+	, sockout (-1)
+{
+	if (!open_sockets (base_port, iface)) {
+		throw (failed_constructor ());
+	}
+}
+
+IPMIDIPort::IPMIDIPort (const XMLNode& node)
+	: Port (node)
+{
+	/* base class does not class set_state() */
+	set_state (node);
+}
+
+IPMIDIPort::~IPMIDIPort ()
+{
+	close_sockets ();
+}
+
+int
+IPMIDIPort::selectable () const
+{ 
+	return sockin; 
+}
+
+XMLNode&
+IPMIDIPort::get_state () const
+{
+	return Port::get_state ();
+}
+
+void
+IPMIDIPort::set_state (const XMLNode& node)
+{
+	Port::set_state (node);
+}
+
+void
+IPMIDIPort::close_sockets ()
+{
+	if (sockin >= 0) {
+		::closesocket (sockin);
+		sockin = -1;
+	}
+	
+	if (sockout >= 0) {
+		::closesocket (sockout);
+		sockout = -1;
+	}
+}
+
+static bool 
+get_address (int sock, struct in_addr *inaddr, const string& ifname )
+{
+	// Get interface address from supplied name.
+
+#if !defined(WIN32)
+	struct ifreq ifr;
+	::strncpy(ifr.ifr_name, ifname.c_str(), sizeof(ifr.ifr_name));
+
+	if (::ioctl(sock, SIOCGIFFLAGS, (char *) &ifr)) {
+		::perror("ioctl(SIOCGIFFLAGS)");
+		return false;
+	}
+
+	if ((ifr.ifr_flags & IFF_UP) == 0) {
+		error << string_compose ("interface %1 is down", ifname) << endmsg;
+		return false;
+	}
+
+	if (::ioctl(sock, SIOCGIFADDR, (char *) &ifr)) {
+		::perror("ioctl(SIOCGIFADDR)");
+		return false;
+	}
+
+	struct sockaddr_in sa;
+	::memcpy(&sa, &ifr.ifr_addr, sizeof(struct sockaddr_in));
+	inaddr->s_addr = sa.sin_addr.s_addr;
+
+	return true;
+
+#else
+
+	return false;
+
+#endif	// !WIN32
+}
+
+bool
+IPMIDIPort::open_sockets (int base_port, const string& ifname)
+{
+	int protonum = 0;
+	struct protoent *proto = ::getprotobyname("IP");
+
+	if (proto) {
+		protonum = proto->p_proto;
+	}
+
+	sockin = ::socket (PF_INET, SOCK_DGRAM, protonum);
+	if (sockin < 0) {
+		::perror("socket(in)");
+		return false;
+	}
+
+	struct sockaddr_in addrin;
+	::memset(&addrin, 0, sizeof(addrin));
+	addrin.sin_family = AF_INET;
+	addrin.sin_addr.s_addr = htonl(INADDR_ANY);
+	addrin.sin_port = htons(base_port);
+	
+	if (::bind(sockin, (struct sockaddr *) (&addrin), sizeof(addrin)) < 0) {
+		::perror("bind");
+		return false;
+	}
+	
+	// Will Hall, 2007
+	// INADDR_ANY will bind to default interface,
+	// specify alternate interface nameon which to bind...
+	struct in_addr if_addr_in;
+	if (!ifname.empty()) {
+		if (!get_address(sockin, &if_addr_in, ifname)) {
+			error << string_compose ("socket(in): could not find interface address for %1", ifname) << endmsg;
+			return false;
+		}
+		if (::setsockopt(sockin, IPPROTO_IP, IP_MULTICAST_IF,
+				 (char *) &if_addr_in, sizeof(if_addr_in))) {
+			::perror("setsockopt(IP_MULTICAST_IF)");
+			return false;
+		}
+	} else {
+		if_addr_in.s_addr = htonl (INADDR_ANY);
+	}
+	
+	struct ip_mreq mreq;
+	mreq.imr_multiaddr.s_addr = ::inet_addr("225.0.0.37");
+	mreq.imr_interface.s_addr = if_addr_in.s_addr;
+	if(::setsockopt (sockin, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) &mreq, sizeof(mreq)) < 0) {
+		::perror("setsockopt(IP_ADD_MEMBERSHIP)");
+		fprintf(stderr, "socket(in): your kernel is probably missing multicast support.\n");
+		return false;
+	}
+
+	// Output socket...
+
+	sockout = ::socket (AF_INET, SOCK_DGRAM, protonum);
+
+	if (sockout < 0) {
+		::perror("socket(out)");
+		return false;
+	}
+	
+	// Will Hall, Oct 2007
+	if (!ifname.empty()) {
+		struct in_addr if_addr_out;
+		if (!get_address(sockout, &if_addr_out, ifname)) {
+			error << string_compose ("socket(out): could not find interface address for %1", ifname) << endmsg;
+			return false;
+		}
+		if (::setsockopt(sockout, IPPROTO_IP, IP_MULTICAST_IF, (char *) &if_addr_out, sizeof(if_addr_out))) {
+			::perror("setsockopt(IP_MULTICAST_IF)");
+			return false;
+		}
+	}
+	
+	::memset(&addrout, 0, sizeof(struct sockaddr_in));
+	addrout.sin_family = AF_INET;
+	addrout.sin_addr.s_addr = ::inet_addr("225.0.0.37");
+	addrout.sin_port = htons (base_port);
+	
+	// Turn off loopback...
+	int loop = 0;
+	if (::setsockopt(sockout, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &loop, sizeof (loop)) < 0) {
+		::perror("setsockopt(IP_MULTICAST_LOOP)");
+		return false;
+	}
+
+	if (fcntl (sockin, F_SETFL, O_NONBLOCK)) {
+		error << "cannot set non-blocking mode for IP MIDI input socket (" << ::strerror (errno) << ')' << endmsg;
+		return false;
+	}
+
+	if (fcntl (sockout, F_SETFL, O_NONBLOCK)) {
+		error << "cannot set non-blocking mode for IP MIDI output socket (" << ::strerror (errno) << ')' << endmsg;
+		return false;
+	}
+	
+	return true;
+}
+
+int
+IPMIDIPort::write (byte* msg, size_t msglen, timestamp_t /* ignored */) {
+
+	if (sockout) {
+		if (::sendto (sockout, (char *) msg, msglen, 0, (struct sockaddr *) &addrout, sizeof(struct sockaddr_in)) < 0) {
+			::perror("sendto");
+			return -1;
+		}
+		return msglen;
+	}
+	return 0;
+}
+
+int
+IPMIDIPort::read (byte* buf, size_t bufsize)
+{
+	/* nothing to do here - all handled by parse() */
+	return 0;
+}
+
+void
+IPMIDIPort::parse (framecnt_t timestamp)
+{
+	/* input was detected on the socket, so go get it and hand it to the
+	 * parser. This will emit appropriate signals that will be handled
+	 * by anyone who cares.
+	 */
+	
+	unsigned char buf[1024];
+	struct sockaddr_in sender;
+	socklen_t slen = sizeof(sender);
+	int r = ::recvfrom (sockin, (char *) buf, sizeof(buf), 0, (struct sockaddr *) &sender, &slen);
+
+	if (r >= 0) {
+
+		_parser->set_timestamp (timestamp);
+		
+		for (int i = 0; i < r; ++i) {
+			_parser->scanner (buf[i]);
+		}
+	} else {
+		::perror ("failed to recv from socket");
+	}
+}
+
diff --git a/libs/midi++2/jack_midi_port.cc b/libs/midi++2/jack_midi_port.cc
new file mode 100644
index 0000000000..b00aff8d8d
--- /dev/null
+++ b/libs/midi++2/jack_midi_port.cc
@@ -0,0 +1,466 @@
+/*
+    Copyright (C) 1998 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.
+
+    $Id$
+*/
+#include <iostream>
+#include <cstdio>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <jack/jack.h>
+#include <jack/midiport.h>
+
+#include "pbd/xml++.h"
+#include "pbd/error.h"
+#include "pbd/failed_constructor.h"
+#include "pbd/convert.h"
+#include "pbd/strsplit.h"
+#include "pbd/stacktrace.h"
+
+#include "midi++/types.h"
+#include "midi++/jack_midi_port.h"
+#include "midi++/channel.h"
+
+using namespace MIDI;
+using namespace std;
+using namespace PBD;
+
+pthread_t JackMIDIPort::_process_thread;
+Signal0<void> JackMIDIPort::JackHalted;
+Signal0<void> JackMIDIPort::MakeConnections;
+
+JackMIDIPort::JackMIDIPort (string const & name, Flags flags, jack_client_t* jack_client)
+	: Port (name, flags)
+	, _currently_in_cycle (false)
+	, _nframes_this_cycle (0)
+	, _jack_client (jack_client)
+	, _jack_port (0)
+	, output_fifo (512)
+	, input_fifo (1024)
+	, xthread (true)
+{
+	assert (jack_client);
+	init (name, flags);
+}
+
+JackMIDIPort::JackMIDIPort (const XMLNode& node, jack_client_t* jack_client)
+	: Port (node)
+	, _currently_in_cycle (false)
+	, _nframes_this_cycle (0)
+	, _jack_client (jack_client)
+	, _jack_port (0)
+	, output_fifo (512)
+	, input_fifo (1024)
+	, xthread (true)
+{
+	assert (jack_client);
+
+	Descriptor desc (node);
+	init (desc.tag, desc.flags);
+	set_state (node);
+}
+
+void
+JackMIDIPort::init (string const & name, Flags flags)
+{
+	if (!create_port ()) {
+		_ok = true;
+	}
+
+	MakeConnections.connect_same_thread (connect_connection, boost::bind (&JackMIDIPort::make_connections, this));
+	JackHalted.connect_same_thread (halt_connection, boost::bind (&JackMIDIPort::jack_halted, this));
+}
+
+
+JackMIDIPort::~JackMIDIPort ()
+{
+	for (int i = 0; i < 16; i++) {
+		delete _channel[i];
+	}
+
+	if (_jack_port) {
+		if (_jack_client) {
+			jack_port_unregister (_jack_client, _jack_port);
+			_jack_port = 0;
+		}
+	}
+}
+
+void
+JackMIDIPort::parse (framecnt_t timestamp)
+{
+	byte buf[512];
+
+	/* NOTE: parsing is done (if at all) by initiating a read from 
+	   the port. Each port implementation calls on the parser
+	   once it has data ready.
+	*/
+	
+	_parser->set_timestamp (timestamp);
+
+	while (1) {
+		
+		// cerr << "+++ READ ON " << name() << endl;
+
+		int nread = read (buf, sizeof (buf));
+
+		// cerr << "-- READ (" << nread << " ON " << name() << endl;
+		
+		if (nread > 0) {
+			if ((size_t) nread < sizeof (buf)) {
+				break;
+			} else {
+				continue;
+			}
+		} else if (nread == 0) {
+			break;
+		} else if (errno == EAGAIN) {
+			break;
+		} else {
+			fatal << "Error reading from MIDI port " << name() << endmsg;
+			/*NOTREACHED*/
+		}
+	}
+}
+
+void
+JackMIDIPort::cycle_start (pframes_t nframes)
+{
+	assert (_jack_port);
+	
+	_currently_in_cycle = true;
+	_nframes_this_cycle = nframes;
+
+	assert(_nframes_this_cycle == nframes);
+
+	if (sends_output()) {
+		void *buffer = jack_port_get_buffer (_jack_port, nframes);
+		jack_midi_clear_buffer (buffer);
+		flush (buffer);	
+	}
+	
+	if (receives_input()) {
+		void* jack_buffer = jack_port_get_buffer(_jack_port, nframes);
+		const pframes_t event_count = jack_midi_get_event_count(jack_buffer);
+
+		jack_midi_event_t ev;
+		timestamp_t cycle_start_frame = jack_last_frame_time (_jack_client);
+
+		for (pframes_t i = 0; i < event_count; ++i) {
+			jack_midi_event_get (&ev, jack_buffer, i);
+			input_fifo.write (cycle_start_frame + ev.time, (Evoral::EventType) 0, ev.size, ev.buffer);
+		}	
+		
+		if (event_count) {
+			xthread.wakeup ();
+		}
+	}
+}
+
+void
+JackMIDIPort::cycle_end ()
+{
+	if (sends_output()) {
+		flush (jack_port_get_buffer (_jack_port, _nframes_this_cycle));
+	}
+
+	_currently_in_cycle = false;
+	_nframes_this_cycle = 0;
+}
+
+void
+JackMIDIPort::jack_halted ()
+{
+	_jack_client = 0;
+	_jack_port = 0;
+}
+
+void
+JackMIDIPort::drain (int check_interval_usecs)
+{
+	RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
+
+	if (is_process_thread()) {
+		error << "Process thread called MIDI::JackMIDIPort::drain() - this cannot work" << endmsg;
+		return;
+	}
+
+	while (1) {
+		output_fifo.get_write_vector (&vec);
+		if (vec.len[0] + vec.len[1] >= output_fifo.bufsize() - 1) {
+			break;
+		}
+		usleep (check_interval_usecs);
+	}
+}
+
+int
+JackMIDIPort::write(byte * msg, size_t msglen, timestamp_t timestamp)
+{
+	int ret = 0;
+
+	if (!sends_output()) {
+		return ret;
+	}
+	
+	if (!is_process_thread()) {
+
+		Glib::Mutex::Lock lm (output_fifo_lock);
+		RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
+		
+		output_fifo.get_write_vector (&vec);
+
+		if (vec.len[0] + vec.len[1] < 1) {
+			error << "no space in FIFO for non-process thread MIDI write" << endmsg;
+			return 0;
+		}
+
+		if (vec.len[0]) {
+                        if (!vec.buf[0]->owns_buffer()) {
+                                vec.buf[0]->set_buffer (0, 0, true);
+                        }
+			vec.buf[0]->set (msg, msglen, timestamp);
+		} else {
+                        if (!vec.buf[1]->owns_buffer()) {
+                                vec.buf[1]->set_buffer (0, 0, true);
+                        }
+			vec.buf[1]->set (msg, msglen, timestamp);
+		}
+
+		output_fifo.increment_write_idx (1);
+		
+		ret = msglen;
+
+	} else {
+
+		// XXX This had to be temporarily commented out to make export work again
+		if (!(timestamp < _nframes_this_cycle)) {
+			std::cerr << "attempting to write MIDI event of " << msglen << " bytes at time "
+				  << timestamp << " of " << _nframes_this_cycle
+				  << " (this will not work - needs a code fix)"
+				  << std::endl;
+		}
+
+		if (_currently_in_cycle) {
+			if (timestamp == 0) {
+				timestamp = _last_write_timestamp;
+			} 
+
+			if (jack_midi_event_write (jack_port_get_buffer (_jack_port, _nframes_this_cycle), 
+						timestamp, msg, msglen) == 0) {
+				ret = msglen;
+				_last_write_timestamp = timestamp;
+
+			} else {
+				ret = 0;
+				cerr << "write of " << msglen << " failed, port holds "
+					<< jack_midi_get_event_count (jack_port_get_buffer (_jack_port, _nframes_this_cycle))
+					<< endl;
+			}
+		} else {
+			cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
+			PBD::stacktrace (cerr, 20);
+		}
+	}
+
+	if (ret > 0 && _parser) {
+		// ardour doesn't care about this and neither should your app, probably
+		// output_parser->raw_preparse (*output_parser, msg, ret);
+		for (int i = 0; i < ret; i++) {
+			_parser->scanner (msg[i]);
+		}
+		// ardour doesn't care about this and neither should your app, probably
+		// output_parser->raw_postparse (*output_parser, msg, ret);
+	}	
+
+	return ret;
+}
+
+void
+JackMIDIPort::flush (void* jack_port_buffer)
+{
+	RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0 } };
+	size_t written;
+
+	output_fifo.get_read_vector (&vec);
+
+	if (vec.len[0] + vec.len[1]) {
+		// cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
+	}
+
+	if (vec.len[0]) {
+		Evoral::Event<double>* evp = vec.buf[0];
+		
+		for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
+			jack_midi_event_write (jack_port_buffer,
+					       (timestamp_t) evp->time(), evp->buffer(), evp->size());
+		}
+	}
+	
+	if (vec.len[1]) {
+		Evoral::Event<double>* evp = vec.buf[1];
+
+		for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
+			jack_midi_event_write (jack_port_buffer,
+					       (timestamp_t) evp->time(), evp->buffer(), evp->size());
+		}
+	}
+	
+	if ((written = vec.len[0] + vec.len[1]) != 0) {
+		output_fifo.increment_read_idx (written);
+	}
+}
+
+int
+JackMIDIPort::read (byte *, size_t)
+{
+	if (!receives_input()) {
+		return 0;
+	}
+	
+	timestamp_t time;
+	Evoral::EventType type;
+	uint32_t size;
+	byte buffer[input_fifo.capacity()];
+
+	while (input_fifo.read (&time, &type, &size, buffer)) {
+		_parser->set_timestamp (time);
+		for (uint32_t i = 0; i < size; ++i) {
+			_parser->scanner (buffer[i]);
+		}
+	}
+
+	return 0;
+}
+
+int
+JackMIDIPort::create_port ()
+{
+	_jack_port = jack_port_register(_jack_client, _tagname.c_str(), JACK_DEFAULT_MIDI_TYPE, _flags, 0);
+	return _jack_port == 0 ? -1 : 0;
+}
+
+XMLNode& 
+JackMIDIPort::get_state () const
+{
+	XMLNode& root = Port::get_state ();
+	
+#if 0
+	byte device_inquiry[6];
+
+	device_inquiry[0] = 0xf0;
+	device_inquiry[0] = 0x7e;
+	device_inquiry[0] = 0x7f;
+	device_inquiry[0] = 0x06;
+	device_inquiry[0] = 0x02;
+	device_inquiry[0] = 0xf7;
+	
+	write (device_inquiry, sizeof (device_inquiry), 0);
+#endif
+
+	if (_jack_port) {
+		
+		const char** jc = jack_port_get_connections (_jack_port);
+		string connection_string;
+		if (jc) {
+			for (int i = 0; jc[i]; ++i) {
+				if (i > 0) {
+					connection_string += ',';
+				}
+				connection_string += jc[i];
+			}
+			free (jc);
+		}
+		
+		if (!connection_string.empty()) {
+			root.add_property ("connections", connection_string);
+		}
+	} else {
+		if (!_connections.empty()) {
+			root.add_property ("connections", _connections);
+		}
+	}
+
+	return root;
+}
+
+void
+JackMIDIPort::set_state (const XMLNode& node)
+{
+	const XMLProperty* prop;
+
+	if ((prop = node.property ("tag")) == 0 || prop->value() != _tagname) {
+		return;
+	}
+	
+	Port::set_state (node);
+
+	if ((prop = node.property ("connections")) != 0) {
+		_connections = prop->value ();
+	}
+}
+
+void
+JackMIDIPort::make_connections ()
+{
+	if (!_connections.empty()) {
+		vector<string> ports;
+		split (_connections, ports, ',');
+		for (vector<string>::iterator x = ports.begin(); x != ports.end(); ++x) {
+			if (_jack_client) {
+				if (receives_input()) {
+					jack_connect (_jack_client, (*x).c_str(), jack_port_name (_jack_port));
+				} else {
+					jack_connect (_jack_client, jack_port_name (_jack_port), (*x).c_str());
+				}
+				/* ignore failures */
+			}
+		}
+	}
+
+	connect_connection.disconnect ();
+}
+
+void
+JackMIDIPort::set_process_thread (pthread_t thr)
+{
+	_process_thread = thr;
+}
+
+bool
+JackMIDIPort::is_process_thread()
+{
+	return (pthread_self() == _process_thread);
+}
+
+void
+JackMIDIPort::reestablish (jack_client_t* jack)
+{
+	_jack_client = jack;
+	int const r = create_port ();
+
+	if (r) {
+		PBD::error << "could not reregister ports for " << name() << endmsg;
+	}
+}
+
+void
+JackMIDIPort::reconnect ()
+{
+	make_connections ();
+}
diff --git a/libs/midi++2/manager.cc b/libs/midi++2/manager.cc
index 61d4c4c363..822c74e125 100644
--- a/libs/midi++2/manager.cc
+++ b/libs/midi++2/manager.cc
@@ -27,6 +27,7 @@
 #include "midi++/manager.h"
 #include "midi++/channel.h"
 #include "midi++/port.h"
+#include "midi++/jack_midi_port.h"
 #include "midi++/mmc.h"
 
 using namespace std;
@@ -40,12 +41,12 @@ Manager::Manager (jack_client_t* jack)
 {
 	_mmc = new MachineControl (this, jack);
 	
-	_mtc_input_port = add_port (new MIDI::Port ("MTC in", Port::IsInput, jack));
-	_mtc_output_port = add_port (new MIDI::Port ("MTC out", Port::IsOutput, jack));
-	_midi_input_port = add_port (new MIDI::Port ("MIDI control in", Port::IsInput, jack));
-	_midi_output_port = add_port (new MIDI::Port ("MIDI control out", Port::IsOutput, jack));
-	_midi_clock_input_port = add_port (new MIDI::Port ("MIDI clock in", Port::IsInput, jack));
-	_midi_clock_output_port = add_port (new MIDI::Port ("MIDI clock out", Port::IsOutput, jack));
+	_mtc_input_port = add_port (new MIDI::JackMIDIPort ("MTC in", Port::IsInput, jack));
+	_mtc_output_port = add_port (new MIDI::JackMIDIPort ("MTC out", Port::IsOutput, jack));
+	_midi_input_port = add_port (new MIDI::JackMIDIPort ("MIDI control in", Port::IsInput, jack));
+	_midi_output_port = add_port (new MIDI::JackMIDIPort ("MIDI control out", Port::IsOutput, jack));
+	_midi_clock_input_port = add_port (new MIDI::JackMIDIPort ("MIDI clock in", Port::IsInput, jack));
+	_midi_clock_output_port = add_port (new MIDI::JackMIDIPort ("MIDI clock out", Port::IsOutput, jack));
 }
 
 Manager::~Manager ()
@@ -117,7 +118,10 @@ Manager::reestablish (jack_client_t* jack)
 	boost::shared_ptr<PortList> pr = _ports.reader ();
 
 	for (PortList::const_iterator p = pr->begin(); p != pr->end(); ++p) {
-		(*p)->reestablish (jack);
+		JackMIDIPort* pp = dynamic_cast<JackMIDIPort*> (*p);
+		if (pp) {
+			pp->reestablish (jack);
+		}
 	}
 }
 
@@ -128,7 +132,10 @@ Manager::reconnect ()
 	boost::shared_ptr<PortList> pr = _ports.reader ();
 
 	for (PortList::const_iterator p = pr->begin(); p != pr->end(); ++p) {
-		(*p)->reconnect ();
+		JackMIDIPort* pp = dynamic_cast<JackMIDIPort*> (*p);
+		if (pp) {
+			pp->reconnect ();
+		}
 	}
 }
 
diff --git a/libs/midi++2/midi++/channel.h b/libs/midi++2/midi++/channel.h
index 370a569156..d00ce700c5 100644
--- a/libs/midi++2/midi++/channel.h
+++ b/libs/midi++2/midi++/channel.h
@@ -39,9 +39,9 @@ class Port;
 class Channel : public PBD::ScopedConnectionList {
 
   public:
-	Channel (byte channel_number, PortBase &);
+	Channel (byte channel_number, Port &);
 
-	PortBase &midi_port()           { return _port; }
+	Port &midi_port()           { return _port; }
 	byte channel()                  { return _channel_number; }
 	byte program()                  { return _program_number; }
 	byte bank()                     { return _bank_number; }
@@ -111,11 +111,11 @@ class Channel : public PBD::ScopedConnectionList {
 	}
 
   protected:
-	friend class PortBase;
+	friend class Port;
 	void connect_signals ();
 
   private:
-	PortBase& _port;
+	Port& _port;
 
 	/* Current channel values */
 	byte               _channel_number;
diff --git a/libs/midi++2/midi++/ipmidi_port.h b/libs/midi++2/midi++/ipmidi_port.h
new file mode 100644
index 0000000000..bf949bd601
--- /dev/null
+++ b/libs/midi++2/midi++/ipmidi_port.h
@@ -0,0 +1,76 @@
+/*
+    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  __libmidi_ipmidi_port_h__
+#define  __libmidi_ipmidi_port_h__
+
+#include <string>
+#include <iostream>
+#if defined(WIN32)
+#include <winsock.h>
+#else
+#include <arpa/inet.h>
+#include <net/if.h>
+#endif
+
+#include <jack/types.h>
+
+#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"
+
+namespace MIDI {
+
+class IPMIDIPort : public Port {
+  public:
+    IPMIDIPort (int base_port = lowest_ipmidi_port_default, const std::string& ifname = std::string());
+    IPMIDIPort (const XMLNode&);
+    ~IPMIDIPort ();
+    
+    XMLNode& get_state () const;
+    void set_state (const XMLNode&);
+    
+    int write (byte *msg, size_t msglen, timestamp_t timestamp);
+    int read (byte *buf, size_t bufsize);
+    void parse (framecnt_t timestamp);
+    int selectable () const;
+
+    static const int lowest_ipmidi_port_default = 21928;
+
+private:	
+    int sockin;
+    int sockout;
+    struct sockaddr_in addrout;
+    
+    bool open_sockets (int base_port, const std::string& ifname);
+    void close_sockets ();
+
+    void init (std::string const &, Flags);
+};
+
+} // namespace MIDI
+
+#endif // __libmidi_ipmidi_port_h__
diff --git a/libs/midi++2/midi++/jack_midi_port.h b/libs/midi++2/midi++/jack_midi_port.h
new file mode 100644
index 0000000000..e381120a99
--- /dev/null
+++ b/libs/midi++2/midi++/jack_midi_port.h
@@ -0,0 +1,103 @@
+/*
+    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  __libmidi_port_h__
+#define  __libmidi_port_h__
+
+#include <string>
+#include <iostream>
+
+#include <jack/types.h>
+
+#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"
+
+namespace MIDI {
+
+class Channel;
+class PortRequest;
+
+class JackMIDIPort : public Port {
+  public:
+	JackMIDIPort (std::string const &, Port::Flags, jack_client_t *);
+	JackMIDIPort (const XMLNode&, jack_client_t *);
+	~JackMIDIPort ();
+
+	XMLNode& get_state () const;
+	void set_state (const XMLNode&);
+
+	void cycle_start (pframes_t nframes);
+	void cycle_end ();
+
+	void parse (framecnt_t timestamp);
+	int write (byte *msg, size_t msglen, timestamp_t timestamp);
+	int read (byte *buf, size_t bufsize);
+	void drain (int check_interval_usecs);
+	int selectable () const { return xthread.selectable(); }
+
+	pframes_t nframes_this_cycle() const { return _nframes_this_cycle; }
+
+	void reestablish (jack_client_t *);
+	void reconnect ();
+
+	static void set_process_thread (pthread_t);
+	static pthread_t get_process_thread () { return _process_thread; }
+	static bool is_process_thread();
+
+	static PBD::Signal0<void> MakeConnections;
+	static PBD::Signal0<void> JackHalted;
+
+private:	
+	bool              _currently_in_cycle;
+	pframes_t         _nframes_this_cycle;
+	jack_client_t*    _jack_client;
+	jack_port_t*      _jack_port;
+	timestamp_t       _last_write_timestamp;
+	RingBuffer< Evoral::Event<double> > output_fifo;
+	Evoral::EventRingBuffer<timestamp_t> input_fifo;
+	Glib::Mutex output_fifo_lock;
+	CrossThreadChannel xthread;
+
+	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);
+
+	static pthread_t _process_thread;
+
+};
+
+} // namespace MIDI
+
+#endif // __libmidi_port_h__
diff --git a/libs/midi++2/midi++/manager.h b/libs/midi++2/midi++/manager.h
index bab4a18dd2..c37ba392b4 100644
--- a/libs/midi++2/midi++/manager.h
+++ b/libs/midi++2/midi++/manager.h
@@ -88,12 +88,12 @@ class Manager {
 	static Manager *theManager;
 
 	MIDI::MachineControl*   _mmc;
-	MIDI::Port*             _mtc_input_port;
-	MIDI::Port*             _mtc_output_port;
-	MIDI::Port*             _midi_input_port;
-	MIDI::Port*             _midi_output_port;
-	MIDI::Port*             _midi_clock_input_port;
-	MIDI::Port*             _midi_clock_output_port;
+	MIDI::Port*         _mtc_input_port;
+	MIDI::Port*         _mtc_output_port;
+	MIDI::Port*         _midi_input_port;
+	MIDI::Port*         _midi_output_port;
+	MIDI::Port*         _midi_clock_input_port;
+	MIDI::Port*         _midi_clock_output_port;
 
 	SerializedRCUManager<PortList> _ports;
 };
diff --git a/libs/midi++2/midi++/parser.h b/libs/midi++2/midi++/parser.h
index ac452798cc..f5f343e952 100644
--- a/libs/midi++2/midi++/parser.h
+++ b/libs/midi++2/midi++/parser.h
@@ -29,7 +29,7 @@
 
 namespace MIDI {
 
-class PortBase;
+class Port;
 class Parser;
 
 typedef PBD::Signal1<void,Parser&>                   ZeroByteSignal;
@@ -41,7 +41,7 @@ typedef PBD::Signal3<void,Parser &, byte *, size_t>  Signal;
 
 class Parser {
  public:
-	Parser (PortBase &p);
+	Parser (Port &p);
 	~Parser ();
 
 	/* sets the time that will be reported for any MTC or MIDI Clock
@@ -105,7 +105,7 @@ class Parser {
 	const char *midi_event_type_name (MIDI::eventType);
 	void trace (bool onoff, std::ostream *o, const std::string &prefix = "");
 	bool tracing() { return trace_stream != 0; }
-	PortBase &port() { return _port; }
+	Port &port() { return _port; }
 
 	void set_offline (bool);
 	bool offline() const { return _offline; }
@@ -136,7 +136,7 @@ class Parser {
 	void reset_mtc_state ();
 	
   private:
-	PortBase&_port;
+	Port&_port;
 	/* tracing */
 	
 	std::ostream *trace_stream;
diff --git a/libs/midi++2/midi++/port.h b/libs/midi++2/midi++/port.h
index e7b532013e..a2315f7284 100644
--- a/libs/midi++2/midi++/port.h
+++ b/libs/midi++2/midi++/port.h
@@ -16,8 +16,8 @@
 
 */
 
-#ifndef  __libmidi_port_h__
-#define  __libmidi_port_h__
+#ifndef  __libmidi_port_base_h__
+#define  __libmidi_port_base_h__
 
 #include <string>
 #include <iostream>
@@ -34,70 +34,127 @@
 
 #include "midi++/types.h"
 #include "midi++/parser.h"
-#include "midi++/port_base.h"
 
 namespace MIDI {
 
 class Channel;
 class PortRequest;
 
-class Port : public PortBase {
+class Port {
   public:
-	Port (std::string const &, PortBase::Flags, jack_client_t *);
-	Port (const XMLNode&, jack_client_t *);
-	~Port ();
+	enum Flags {
+		IsInput = JackPortIsInput,
+		IsOutput = JackPortIsOutput,
+	};
+	
+	Port (std::string const &, Flags);
+	Port (const XMLNode&);
+	virtual ~Port ();
 
 	XMLNode& get_state () const;
 	void set_state (const XMLNode&);
 
-	void cycle_start (pframes_t nframes);
-	void cycle_end ();
+	// FIXME: make Manager a friend of port so these can be hidden?
+
+	/* Only for use by MidiManager.  Don't ever call this. */
+	virtual void cycle_start (pframes_t nframes) {}
+	/* Only for use by MidiManager.  Don't ever call this. */
+	virtual void cycle_end () {}
+
+	/** Write a message to port.
+	 * @param msg Raw MIDI message to send
+	 * @param msglen Size of @a msg
+	 * @param timestamp Time stamp in frames of this message (relative to cycle start)
+	 * @return number of bytes successfully written
+	 */
+	virtual int write (byte *msg, size_t msglen, timestamp_t timestamp) = 0;
+
+	/** Read raw bytes from a port.
+	 * @param buf memory to store read data in
+	 * @param bufsize size of @a buf
+	 * @return number of bytes successfully read, negative if error
+	 */
+	virtual int read (byte *buf, size_t bufsize) = 0;
+
+	/** block until the output FIFO used by non-process threads
+	 * is empty, checking every @a check_interval_usecs usecs
+	 * for current status. Not to be called by a thread that
+	 * executes any part of a JACK process callback (will 
+	 * simply return immediately in that situation).
+	 */
+	virtual void drain (int check_interval_usecs) {}
+
+	/** Write a message to port.
+	 * @return true on success.
+	 * FIXME: describe semantics here
+	 */
+	int midimsg (byte *msg, size_t len, timestamp_t timestamp) {
+		return !(write (msg, len, timestamp) == (int) len);
+	} 
+
+	virtual void parse (framecnt_t timestamp) = 0;
+
+	bool clock (timestamp_t timestamp);
+
+	/* select(2)/poll(2)-based I/O */
+
+	/** Get the file descriptor for port.
+	 * @return File descriptor, or -1 if not selectable. 
+	 */
+	virtual int selectable () const = 0;
+
+	Channel *channel (channel_t chn) { 
+		return _channel[chn&0x7F];
+	}
+	
+	Parser* parser () {
+		return _parser;
+	}
+	
+	const char *name () const   { return _tagname.c_str(); }
+	bool   ok ()   const        { return _ok; }
 
-	void parse (framecnt_t timestamp);
-	int write (byte *msg, size_t msglen, timestamp_t timestamp);
-	int read (byte *buf, size_t bufsize);
-	void drain (int check_interval_usecs);
-	int selectable () const { return xthread.selectable(); }
+	virtual bool centrally_parsed() const;
+	void set_centrally_parsed (bool yn) { _centrally_parsed = yn; }
 
-	pframes_t nframes_this_cycle() const { return _nframes_this_cycle; }
+	bool receives_input () const {
+		return _flags == IsInput;
+	}
 
-	void reestablish (jack_client_t *);
-	void reconnect ();
+	bool sends_output () const {
+		return _flags == IsOutput;
+	}
 
-	static void set_process_thread (pthread_t);
-	static pthread_t get_process_thread () { return _process_thread; }
-	static bool is_process_thread();
+	struct Descriptor {
+	    std::string tag;
+	    Flags flags;
 
-	static PBD::Signal0<void> MakeConnections;
-	static PBD::Signal0<void> JackHalted;
+	    Descriptor (const XMLNode&);
+	    XMLNode& get_state();
+	};
 
-private:	
-	bool              _currently_in_cycle;
-	pframes_t         _nframes_this_cycle;
-	jack_client_t*    _jack_client;
-	jack_port_t*      _jack_port;
-	timestamp_t       _last_write_timestamp;
-	RingBuffer< Evoral::Event<double> > output_fifo;
-	Evoral::EventRingBuffer<timestamp_t> input_fifo;
-	Glib::Mutex output_fifo_lock;
-	CrossThreadChannel xthread;
+	static std::string state_node_name;
 
-	int create_port ();
+  protected:
+	bool              _ok;
+	std::string       _tagname;
+	Channel*          _channel[16];
+	Parser*           _parser;
+	Flags             _flags;
+	bool              _centrally_parsed;
 
-	/** 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);
+};
 
-	static pthread_t _process_thread;
-
+struct PortSet {
+    PortSet (std::string str) : owner (str) { }
+    
+    std::string owner;
+    std::list<XMLNode> ports;
 };
 
+std::ostream & operator << (std::ostream& os, const Port& port);
+
 } // namespace MIDI
 
-#endif // __libmidi_port_h__
+#endif // __libmidi_port_base_h__
diff --git a/libs/midi++2/midi++/port_base.h b/libs/midi++2/midi++/port_base.h
deleted file mode 100644
index f1649d84ba..0000000000
--- a/libs/midi++2/midi++/port_base.h
+++ /dev/null
@@ -1,158 +0,0 @@
-/*
-    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  __libmidi_port_base_h__
-#define  __libmidi_port_base_h__
-
-#include <string>
-#include <iostream>
-
-#include <jack/types.h>
-
-#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"
-
-namespace MIDI {
-
-class Channel;
-class PortRequest;
-
-class PortBase {
-  public:
-	enum Flags {
-		IsInput = JackPortIsInput,
-		IsOutput = JackPortIsOutput,
-	};
-	
-	PortBase (std::string const &, Flags);
-	PortBase (const XMLNode&);
-	virtual ~PortBase ();
-
-	XMLNode& get_state () const;
-	void set_state (const XMLNode&);
-
-	// FIXME: make Manager a friend of port so these can be hidden?
-
-	/* Only for use by MidiManager.  Don't ever call this. */
-	virtual void cycle_start (pframes_t nframes) {}
-	/* Only for use by MidiManager.  Don't ever call this. */
-	virtual void cycle_end () {}
-
-	/** Write a message to port.
-	 * @param msg Raw MIDI message to send
-	 * @param msglen Size of @a msg
-	 * @param timestamp Time stamp in frames of this message (relative to cycle start)
-	 * @return number of bytes successfully written
-	 */
-	virtual int write (byte *msg, size_t msglen, timestamp_t timestamp) = 0;
-
-	/** Read raw bytes from a port.
-	 * @param buf memory to store read data in
-	 * @param bufsize size of @a buf
-	 * @return number of bytes successfully read, negative if error
-	 */
-	virtual int read (byte *buf, size_t bufsize) = 0;
-
-	/** block until the output FIFO used by non-process threads
-	 * is empty, checking every @a check_interval_usecs usecs
-	 * for current status. Not to be called by a thread that
-	 * executes any part of a JACK process callback (will 
-	 * simply return immediately in that situation).
-	 */
-	virtual void drain (int check_interval_usecs) {}
-
-	/** Write a message to port.
-	 * @return true on success.
-	 * FIXME: describe semantics here
-	 */
-	int midimsg (byte *msg, size_t len, timestamp_t timestamp) {
-		return !(write (msg, len, timestamp) == (int) len);
-	} 
-
-	bool clock (timestamp_t timestamp);
-
-	/* select(2)/poll(2)-based I/O */
-
-	/** Get the file descriptor for port.
-	 * @return File descriptor, or -1 if not selectable. 
-	 */
-	virtual int selectable () const = 0;
-
-	Channel *channel (channel_t chn) { 
-		return _channel[chn&0x7F];
-	}
-	
-	Parser* parser () {
-		return _parser;
-	}
-	
-	const char *name () const   { return _tagname.c_str(); }
-	bool   ok ()   const        { return _ok; }
-
-	virtual bool centrally_parsed() const;
-	void set_centrally_parsed (bool yn) { _centrally_parsed = yn; }
-
-	bool receives_input () const {
-		return _flags == IsInput;
-	}
-
-	bool sends_output () const {
-		return _flags == IsOutput;
-	}
-
-	struct Descriptor {
-	    std::string tag;
-	    Flags flags;
-
-	    Descriptor (const XMLNode&);
-	    XMLNode& get_state();
-	};
-
-	static std::string state_node_name;
-
-  protected:
-	bool              _ok;
-	std::string       _tagname;
-	Channel*          _channel[16];
-	Parser*           _parser;
-	Flags             _flags;
-	bool              _centrally_parsed;
-
-	void init (std::string const &, Flags);
-};
-
-struct PortSet {
-    PortSet (std::string str) : owner (str) { }
-    
-    std::string owner;
-    std::list<XMLNode> ports;
-};
-
-std::ostream & operator << (std::ostream& os, const PortBase& port);
-
-} // namespace MIDI
-
-#endif // __libmidi_port_base_h__
diff --git a/libs/midi++2/mmc.cc b/libs/midi++2/mmc.cc
index e02598def2..06eadb5b34 100644
--- a/libs/midi++2/mmc.cc
+++ b/libs/midi++2/mmc.cc
@@ -25,6 +25,7 @@
 #include "pbd/error.h"
 #include "midi++/mmc.h"
 #include "midi++/port.h"
+#include "midi++/jack_midi_port.h"
 #include "midi++/parser.h"
 #include "midi++/manager.h"
 
@@ -202,8 +203,8 @@ MachineControl::MachineControl (Manager* m, jack_client_t* jack)
 	_receive_device_id = 0x7f;
 	_send_device_id = 0x7f;
 
-	_input_port = m->add_port (new Port ("MMC in", Port::IsInput, jack));
-	_output_port = m->add_port (new Port ("MMC out", Port::IsOutput, jack));
+	_input_port = m->add_port (new JackMIDIPort ("MMC in", Port::IsInput, jack));
+	_output_port = m->add_port (new JackMIDIPort ("MMC out", Port::IsOutput, jack));
 
 	_input_port->parser()->mmc.connect_same_thread (port_connections, boost::bind (&MachineControl::process_mmc_message, this, _1, _2, _3));
 	_input_port->parser()->start.connect_same_thread (port_connections, boost::bind (&MachineControl::spp_start, this));
diff --git a/libs/midi++2/parser.cc b/libs/midi++2/parser.cc
index a56e3f82e4..8e3af64504 100644
--- a/libs/midi++2/parser.cc
+++ b/libs/midi++2/parser.cc
@@ -30,7 +30,7 @@
 
 #include "midi++/types.h"
 #include "midi++/parser.h"
-#include "midi++/port_base.h"
+#include "midi++/port.h"
 #include "midi++/mmc.h"
 #include "pbd/transmitter.h"
 
@@ -104,7 +104,7 @@ Parser::midi_event_type_name (eventType t)
 	}
 }
 
-Parser::Parser (PortBase &p) 
+Parser::Parser (Port &p) 
 	: _port(p)
 {
 	trace_stream = 0;
diff --git a/libs/midi++2/port.cc b/libs/midi++2/port.cc
index ef1704857d..3e7896631a 100644
--- a/libs/midi++2/port.cc
+++ b/libs/midi++2/port.cc
@@ -15,7 +15,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id$
+    $Id: port.cc 11871 2012-04-10 16:27:01Z paul $
 */
 #include <iostream>
 #include <cstdio>
@@ -40,325 +40,117 @@ using namespace MIDI;
 using namespace std;
 using namespace PBD;
 
-pthread_t Port::_process_thread;
-Signal0<void> Port::JackHalted;
-Signal0<void> Port::MakeConnections;
-
-Port::Port (string const & name, Flags flags, jack_client_t* jack_client)
-	: PortBase (name, flags)
-	, _currently_in_cycle (false)
-	, _nframes_this_cycle (0)
-	, _jack_client (jack_client)
-	, _jack_port (0)
-	, output_fifo (512)
-	, input_fifo (1024)
-	, xthread (true)
+string Port::state_node_name = "MIDI-port";
+
+Port::Port (string const & name, Flags flags)
+	: _flags (flags)
+	, _centrally_parsed (true)
 {
-	assert (jack_client);
 	init (name, flags);
 }
 
-Port::Port (const XMLNode& node, jack_client_t* jack_client)
-	: PortBase (node)
-	, _currently_in_cycle (false)
-	, _nframes_this_cycle (0)
-	, _jack_client (jack_client)
-	, _jack_port (0)
-	, output_fifo (512)
-	, input_fifo (1024)
-	, xthread (true)
+Port::Port (const XMLNode& node)
+	: _centrally_parsed (true)
 {
-	assert (jack_client);
-
 	Descriptor desc (node);
+
 	init (desc.tag, desc.flags);
-	set_state (node);
+
+	/* derived class must call ::set_state() */
 }
 
 void
 Port::init (string const & name, Flags flags)
 {
-	if (!create_port ()) {
-		_ok = true;
-	}
+	_ok = false;  /* derived class must set to true if constructor
+			 succeeds.
+		      */
 
-	MakeConnections.connect_same_thread (connect_connection, boost::bind (&Port::make_connections, this));
-	JackHalted.connect_same_thread (halt_connection, boost::bind (&Port::jack_halted, this));
-}
+	_parser = 0;
 
+	_tagname = name;
+	_flags = flags;
 
-Port::~Port ()
-{
-	for (int i = 0; i < 16; i++) {
-		delete _channel[i];
-	}
+	_parser = new Parser (*this);
 
-	if (_jack_port) {
-		if (_jack_client) {
-			jack_port_unregister (_jack_client, _jack_port);
-			_jack_port = 0;
-		}
+	for (int i = 0; i < 16; i++) {
+		_channel[i] = new Channel (i, *this);
+		_channel[i]->connect_signals ();
 	}
 }
 
-void
-Port::parse (framecnt_t timestamp)
+Port::~Port ()
 {
-	byte buf[512];
-
-	/* NOTE: parsing is done (if at all) by initiating a read from 
-	   the port. Each port implementation calls on the parser
-	   once it has data ready.
-	*/
-	
-	_parser->set_timestamp (timestamp);
-
-	while (1) {
-		
-		// cerr << "+++ READ ON " << name() << endl;
-
-		int nread = read (buf, sizeof (buf));
-
-		// cerr << "-- READ (" << nread << " ON " << name() << endl;
-		
-		if (nread > 0) {
-			if ((size_t) nread < sizeof (buf)) {
-				break;
-			} else {
-				continue;
-			}
-		} else if (nread == 0) {
-			break;
-		} else if (errno == EAGAIN) {
-			break;
-		} else {
-			fatal << "Error reading from MIDI port " << name() << endmsg;
-			/*NOTREACHED*/
-		}
+	for (int i = 0; i < 16; i++) {
+		delete _channel[i];
 	}
 }
 
-void
-Port::cycle_start (pframes_t nframes)
+/** Send a clock tick message.
+ * \return true on success.
+ */
+bool
+Port::clock (timestamp_t timestamp)
 {
-	assert (_jack_port);
+	static byte clockmsg = 0xf8;
 	
-	_currently_in_cycle = true;
-	_nframes_this_cycle = nframes;
-
-	assert(_nframes_this_cycle == nframes);
-
 	if (sends_output()) {
-		void *buffer = jack_port_get_buffer (_jack_port, nframes);
-		jack_midi_clear_buffer (buffer);
-		flush (buffer);	
+		return midimsg (&clockmsg, 1, timestamp);
 	}
 	
-	if (receives_input()) {
-		void* jack_buffer = jack_port_get_buffer(_jack_port, nframes);
-		const pframes_t event_count = jack_midi_get_event_count(jack_buffer);
-
-		jack_midi_event_t ev;
-		timestamp_t cycle_start_frame = jack_last_frame_time (_jack_client);
-
-		for (pframes_t i = 0; i < event_count; ++i) {
-			jack_midi_event_get (&ev, jack_buffer, i);
-			input_fifo.write (cycle_start_frame + ev.time, (Evoral::EventType) 0, ev.size, ev.buffer);
-		}	
-		
-		if (event_count) {
-			xthread.wakeup ();
-		}
-	}
+	return false;
 }
 
-void
-Port::cycle_end ()
+std::ostream & MIDI::operator << ( std::ostream & os, const MIDI::Port & port )
 {
-	if (sends_output()) {
-		flush (jack_port_get_buffer (_jack_port, _nframes_this_cycle));
-	}
-
-	_currently_in_cycle = false;
-	_nframes_this_cycle = 0;
-}
-
-void
-Port::jack_halted ()
-{
-	_jack_client = 0;
-	_jack_port = 0;
-}
-
-void
-Port::drain (int check_interval_usecs)
-{
-	RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
-
-	if (is_process_thread()) {
-		error << "Process thread called MIDI::Port::drain() - this cannot work" << endmsg;
-		return;
-	}
-
-	while (1) {
-		output_fifo.get_write_vector (&vec);
-		if (vec.len[0] + vec.len[1] >= output_fifo.bufsize() - 1) {
-			break;
-		}
-		usleep (check_interval_usecs);
-	}
+	using namespace std;
+	os << "MIDI::Port { ";
+	os << "name: " << port.name();
+	os << "; ";
+	os << "ok: " << port.ok();
+	os << "; ";
+	os << " }";
+	return os;
 }
 
-int
-Port::write(byte * msg, size_t msglen, timestamp_t timestamp)
+Port::Descriptor::Descriptor (const XMLNode& node)
 {
-	int ret = 0;
-
-	if (!sends_output()) {
-		return ret;
-	}
-	
-	if (!is_process_thread()) {
-
-		Glib::Mutex::Lock lm (output_fifo_lock);
-		RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
-		
-		output_fifo.get_write_vector (&vec);
-
-		if (vec.len[0] + vec.len[1] < 1) {
-			error << "no space in FIFO for non-process thread MIDI write" << endmsg;
-			return 0;
-		}
-
-		if (vec.len[0]) {
-                        if (!vec.buf[0]->owns_buffer()) {
-                                vec.buf[0]->set_buffer (0, 0, true);
-                        }
-			vec.buf[0]->set (msg, msglen, timestamp);
-		} else {
-                        if (!vec.buf[1]->owns_buffer()) {
-                                vec.buf[1]->set_buffer (0, 0, true);
-                        }
-			vec.buf[1]->set (msg, msglen, timestamp);
-		}
-
-		output_fifo.increment_write_idx (1);
-		
-		ret = msglen;
-
-	} else {
-
-		// XXX This had to be temporarily commented out to make export work again
-		if (!(timestamp < _nframes_this_cycle)) {
-			std::cerr << "attempting to write MIDI event of " << msglen << " bytes at time "
-				  << timestamp << " of " << _nframes_this_cycle
-				  << " (this will not work - needs a code fix)"
-				  << std::endl;
-		}
+	const XMLProperty *prop;
+	bool have_tag = false;
+	bool have_mode = false;
 
-		if (_currently_in_cycle) {
-			if (timestamp == 0) {
-				timestamp = _last_write_timestamp;
-			} 
-
-			if (jack_midi_event_write (jack_port_get_buffer (_jack_port, _nframes_this_cycle), 
-						timestamp, msg, msglen) == 0) {
-				ret = msglen;
-				_last_write_timestamp = timestamp;
-
-			} else {
-				ret = 0;
-				cerr << "write of " << msglen << " failed, port holds "
-					<< jack_midi_get_event_count (jack_port_get_buffer (_jack_port, _nframes_this_cycle))
-					<< endl;
-			}
-		} else {
-			cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
-			PBD::stacktrace (cerr, 20);
-		}
+	if ((prop = node.property ("tag")) != 0) {
+		tag = prop->value();
+		have_tag = true;
 	}
 
-	if (ret > 0 && _parser) {
-		// ardour doesn't care about this and neither should your app, probably
-		// output_parser->raw_preparse (*output_parser, msg, ret);
-		for (int i = 0; i < ret; i++) {
-			_parser->scanner (msg[i]);
-		}
-		// ardour doesn't care about this and neither should your app, probably
-		// output_parser->raw_postparse (*output_parser, msg, ret);
-	}	
-
-	return ret;
-}
-
-void
-Port::flush (void* jack_port_buffer)
-{
-	RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0 } };
-	size_t written;
-
-	output_fifo.get_read_vector (&vec);
+	if ((prop = node.property ("mode")) != 0) {
 
-	if (vec.len[0] + vec.len[1]) {
-		// cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
-	}
-
-	if (vec.len[0]) {
-		Evoral::Event<double>* evp = vec.buf[0];
-		
-		for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
-			jack_midi_event_write (jack_port_buffer,
-					       (timestamp_t) evp->time(), evp->buffer(), evp->size());
+		if (strings_equal_ignore_case (prop->value(), "output") || strings_equal_ignore_case (prop->value(), "out")) {
+			flags = IsOutput;
+		} else if (strings_equal_ignore_case (prop->value(), "input") || strings_equal_ignore_case (prop->value(), "in")) {
+			flags = IsInput;
 		}
-	}
-	
-	if (vec.len[1]) {
-		Evoral::Event<double>* evp = vec.buf[1];
 
-		for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
-			jack_midi_event_write (jack_port_buffer,
-					       (timestamp_t) evp->time(), evp->buffer(), evp->size());
-		}
-	}
-	
-	if ((written = vec.len[0] + vec.len[1]) != 0) {
-		output_fifo.increment_read_idx (written);
+		have_mode = true;
 	}
-}
 
-int
-Port::read (byte *, size_t)
-{
-	if (!receives_input()) {
-		return 0;
+	if (!have_tag || !have_mode) {
+		throw failed_constructor();
 	}
-	
-	timestamp_t time;
-	Evoral::EventType type;
-	uint32_t size;
-	byte buffer[input_fifo.capacity()];
-
-	while (input_fifo.read (&time, &type, &size, buffer)) {
-		_parser->set_timestamp (time);
-		for (uint32_t i = 0; i < size; ++i) {
-			_parser->scanner (buffer[i]);
-		}
-	}
-
-	return 0;
-}
-
-int
-Port::create_port ()
-{
-	_jack_port = jack_port_register(_jack_client, _tagname.c_str(), JACK_DEFAULT_MIDI_TYPE, _flags, 0);
-	return _jack_port == 0 ? -1 : 0;
 }
 
 XMLNode& 
 Port::get_state () const
 {
-	XMLNode& root = PortBase::get_state ();
+	XMLNode* root = new XMLNode (state_node_name);
+	root->add_property ("tag", _tagname);
+
+	if (_flags == IsInput) {
+		root->add_property ("mode", "input");
+	} else {
+		root->add_property ("mode", "output");
+	}
 	
 #if 0
 	byte device_inquiry[6];
@@ -373,30 +165,7 @@ Port::get_state () const
 	write (device_inquiry, sizeof (device_inquiry), 0);
 #endif
 
-	if (_jack_port) {
-		
-		const char** jc = jack_port_get_connections (_jack_port);
-		string connection_string;
-		if (jc) {
-			for (int i = 0; jc[i]; ++i) {
-				if (i > 0) {
-					connection_string += ',';
-				}
-				connection_string += jc[i];
-			}
-			free (jc);
-		}
-		
-		if (!connection_string.empty()) {
-			root.add_property ("connections", connection_string);
-		}
-	} else {
-		if (!_connections.empty()) {
-			root.add_property ("connections", _connections);
-		}
-	}
-
-	return root;
+	return *root;
 }
 
 void
@@ -407,60 +176,10 @@ Port::set_state (const XMLNode& node)
 	if ((prop = node.property ("tag")) == 0 || prop->value() != _tagname) {
 		return;
 	}
-	
-	PortBase::set_state (node);
-
-	if ((prop = node.property ("connections")) != 0) {
-		_connections = prop->value ();
-	}
-}
-
-void
-Port::make_connections ()
-{
-	if (!_connections.empty()) {
-		vector<string> ports;
-		split (_connections, ports, ',');
-		for (vector<string>::iterator x = ports.begin(); x != ports.end(); ++x) {
-			if (_jack_client) {
-				if (receives_input()) {
-					jack_connect (_jack_client, (*x).c_str(), jack_port_name (_jack_port));
-				} else {
-					jack_connect (_jack_client, jack_port_name (_jack_port), (*x).c_str());
-				}
-				/* ignore failures */
-			}
-		}
-	}
-
-	connect_connection.disconnect ();
-}
-
-void
-Port::set_process_thread (pthread_t thr)
-{
-	_process_thread = thr;
 }
 
 bool
-Port::is_process_thread()
-{
-	return (pthread_self() == _process_thread);
-}
-
-void
-Port::reestablish (jack_client_t* jack)
-{
-	_jack_client = jack;
-	int const r = create_port ();
-
-	if (r) {
-		PBD::error << "could not reregister ports for " << name() << endmsg;
-	}
-}
-
-void
-Port::reconnect ()
+Port::centrally_parsed() const
 {
-	make_connections ();
+	return _centrally_parsed;
 }
diff --git a/libs/midi++2/port_base.cc b/libs/midi++2/port_base.cc
deleted file mode 100644
index 2910ace2a9..0000000000
--- a/libs/midi++2/port_base.cc
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
-    Copyright (C) 1998 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.
-
-    $Id: port.cc 11871 2012-04-10 16:27:01Z paul $
-*/
-#include <iostream>
-#include <cstdio>
-#include <fcntl.h>
-#include <errno.h>
-
-#include <jack/jack.h>
-#include <jack/midiport.h>
-
-#include "pbd/xml++.h"
-#include "pbd/error.h"
-#include "pbd/failed_constructor.h"
-#include "pbd/convert.h"
-#include "pbd/strsplit.h"
-#include "pbd/stacktrace.h"
-
-#include "midi++/types.h"
-#include "midi++/port_base.h"
-#include "midi++/channel.h"
-
-using namespace MIDI;
-using namespace std;
-using namespace PBD;
-
-string PortBase::state_node_name = "MIDI-port";
-
-PortBase::PortBase (string const & name, Flags flags)
-	: _flags (flags)
-	, _centrally_parsed (true)
-{
-	init (name, flags);
-}
-
-PortBase::PortBase (const XMLNode& node)
-	: _centrally_parsed (true)
-{
-	Descriptor desc (node);
-
-	init (desc.tag, desc.flags);
-
-	/* derived class must call ::set_state() */
-}
-
-void
-PortBase::init (string const & name, Flags flags)
-{
-	_ok = false;  /* derived class must set to true if constructor
-			 succeeds.
-		      */
-
-	_parser = 0;
-
-	_tagname = name;
-	_flags = flags;
-
-	_parser = new Parser (*this);
-
-	for (int i = 0; i < 16; i++) {
-		_channel[i] = new Channel (i, *this);
-		_channel[i]->connect_signals ();
-	}
-}
-
-PortBase::~PortBase ()
-{
-	for (int i = 0; i < 16; i++) {
-		delete _channel[i];
-	}
-}
-
-/** Send a clock tick message.
- * \return true on success.
- */
-bool
-PortBase::clock (timestamp_t timestamp)
-{
-	static byte clockmsg = 0xf8;
-	
-	if (sends_output()) {
-		return midimsg (&clockmsg, 1, timestamp);
-	}
-	
-	return false;
-}
-
-std::ostream & MIDI::operator << ( std::ostream & os, const MIDI::PortBase & port )
-{
-	using namespace std;
-	os << "MIDI::Port { ";
-	os << "name: " << port.name();
-	os << "; ";
-	os << "ok: " << port.ok();
-	os << "; ";
-	os << " }";
-	return os;
-}
-
-PortBase::Descriptor::Descriptor (const XMLNode& node)
-{
-	const XMLProperty *prop;
-	bool have_tag = false;
-	bool have_mode = false;
-
-	if ((prop = node.property ("tag")) != 0) {
-		tag = prop->value();
-		have_tag = true;
-	}
-
-	if ((prop = node.property ("mode")) != 0) {
-
-		if (strings_equal_ignore_case (prop->value(), "output") || strings_equal_ignore_case (prop->value(), "out")) {
-			flags = IsOutput;
-		} else if (strings_equal_ignore_case (prop->value(), "input") || strings_equal_ignore_case (prop->value(), "in")) {
-			flags = IsInput;
-		}
-
-		have_mode = true;
-	}
-
-	if (!have_tag || !have_mode) {
-		throw failed_constructor();
-	}
-}
-
-XMLNode& 
-PortBase::get_state () const
-{
-	XMLNode* root = new XMLNode (state_node_name);
-	root->add_property ("tag", _tagname);
-
-	if (_flags == IsInput) {
-		root->add_property ("mode", "input");
-	} else {
-		root->add_property ("mode", "output");
-	}
-	
-#if 0
-	byte device_inquiry[6];
-
-	device_inquiry[0] = 0xf0;
-	device_inquiry[0] = 0x7e;
-	device_inquiry[0] = 0x7f;
-	device_inquiry[0] = 0x06;
-	device_inquiry[0] = 0x02;
-	device_inquiry[0] = 0xf7;
-	
-	write (device_inquiry, sizeof (device_inquiry), 0);
-#endif
-
-	return *root;
-}
-
-void
-PortBase::set_state (const XMLNode& node)
-{
-	const XMLProperty* prop;
-
-	if ((prop = node.property ("tag")) == 0 || prop->value() != _tagname) {
-		return;
-	}
-}
-
-bool
-PortBase::centrally_parsed() const
-{
-	return _centrally_parsed;
-}
diff --git a/libs/midi++2/wscript b/libs/midi++2/wscript
index eccefe695d..d4f71124aa 100644
--- a/libs/midi++2/wscript
+++ b/libs/midi++2/wscript
@@ -47,9 +47,10 @@ def build(bld):
     obj.source = '''
             midi.cc
             channel.cc
+            ipmidi_port.cc
+            jack_midi_port.cc
             manager.cc
             parser.cc
-            port_base.cc
             port.cc
             midnam_patch.cc
             mmc.cc
diff --git a/libs/pbd/base_ui.cc b/libs/pbd/base_ui.cc
index d56e4a31a4..e3b34a6df2 100644
--- a/libs/pbd/base_ui.cc
+++ b/libs/pbd/base_ui.cc
@@ -74,7 +74,9 @@ BaseUI::main_thread ()
 {
 	set_event_loop_for_thread (this);
 	thread_init ();
+	std::cerr << pthread_self() << ' ' << _name << " running event loop\n";
 	_main_loop->run ();
+	std::cerr << pthread_self() << ' ' << _name << " event loop finished\n";
 }
 
 void
@@ -104,7 +106,7 @@ BaseUI::quit ()
 bool
 BaseUI::request_handler (Glib::IOCondition ioc)
 {
-	/* check the transport request pipe */
+	/* check the request pipe */
 
 	if (ioc & ~IO_IN) {
 		_main_loop->quit ();
diff --git a/libs/pbd/crossthread.cc b/libs/pbd/crossthread.cc
index 553c8d52f3..07a732954b 100644
--- a/libs/pbd/crossthread.cc
+++ b/libs/pbd/crossthread.cc
@@ -81,6 +81,7 @@ RefPtr<IOSource>
 CrossThreadChannel::ios () 
 {
 	if (!_ios) {
+		std::cerr << "New x-channel fd " << fds[0] << std::endl;
 		_ios = new RefPtr<IOSource> (IOSource::create (fds[0], IOCondition(IO_IN|IO_PRI|IO_ERR|IO_HUP|IO_NVAL)));
 	}
 	return *_ios;
diff --git a/libs/surfaces/mackie/device_info.cc b/libs/surfaces/mackie/device_info.cc
index 4df56d3a7a..93800aa43b 100644
--- a/libs/surfaces/mackie/device_info.cc
+++ b/libs/surfaces/mackie/device_info.cc
@@ -50,6 +50,7 @@ DeviceInfo::DeviceInfo()
 	, _has_jog_wheel (true)
 	, _has_touch_sense_faders (true)
 	, _uses_logic_control_buttons (false)
+	, _uses_ipmidi (false)
 	, _name (X_("Mackie Control Universal Pro"))
 {
 	mackie_control_buttons ();
@@ -267,6 +268,12 @@ DeviceInfo::set_state (const XMLNode& node, int /* version */)
 		}
 	}
 
+	if ((child = node.child ("UsesIPMIDI")) != 0) {
+		if ((prop = child->property ("value")) != 0) {
+			_uses_ipmidi = string_is_affirmative (prop->value());
+		}
+	}
+
 	if ((child = node.child ("LogicControlButtons")) != 0) {
 		if ((prop = child->property ("value")) != 0) {
 			_uses_logic_control_buttons = string_is_affirmative (prop->value());
@@ -370,6 +377,12 @@ DeviceInfo::has_timecode_display () const
 }
 
 bool
+DeviceInfo::uses_ipmidi () const
+{
+	return _uses_ipmidi;
+}
+
+bool
 DeviceInfo::has_global_controls () const
 {
 	return _has_global_controls;
diff --git a/libs/surfaces/mackie/device_info.h b/libs/surfaces/mackie/device_info.h
index b08616db45..4071fcffc7 100644
--- a/libs/surfaces/mackie/device_info.h
+++ b/libs/surfaces/mackie/device_info.h
@@ -67,6 +67,7 @@ class DeviceInfo
 	bool has_global_controls() const;
 	bool has_jog_wheel () const;
 	bool has_touch_sense_faders() const;
+	bool uses_ipmidi() const;
 	const std::string& name() const;
 
 	static std::map<std::string,DeviceInfo> device_info;
@@ -86,6 +87,7 @@ class DeviceInfo
     bool     _has_jog_wheel;
     bool     _has_touch_sense_faders;
     bool     _uses_logic_control_buttons;
+    bool     _uses_ipmidi;
     std::string _name;
 
     std::map<Button::ID,GlobalButtonInfo> _global_buttons;
diff --git a/libs/surfaces/mackie/mackie_control_protocol.cc b/libs/surfaces/mackie/mackie_control_protocol.cc
index 2608ec4879..83c4399943 100644
--- a/libs/surfaces/mackie/mackie_control_protocol.cc
+++ b/libs/surfaces/mackie/mackie_control_protocol.cc
@@ -114,7 +114,7 @@ MackieControlProtocol::MackieControlProtocol (Session& session)
 
 	set_device (Config->get_mackie_device_name());
 	set_profile (Config->get_mackie_device_profile());
-
+	
 	TrackSelectionChanged.connect (gui_connections, MISSING_INVALIDATOR, ui_bind (&MackieControlProtocol::gui_track_selection_changed, this, _1), this);
 
 	_instance = this;
@@ -128,6 +128,10 @@ MackieControlProtocol::~MackieControlProtocol()
 
 	_active = false;
 
+	/* stop event loop */
+
+	BaseUI::quit ();
+
 	try {
 		close();
 	}
@@ -584,21 +588,23 @@ MackieControlProtocol::create_surfaces ()
 		}
 		stype = ext;
 
-		_input_bundle->add_channel (
-			surface->port().input_port().name(),
-			ARDOUR::DataType::MIDI,
-			session->engine().make_port_name_non_relative (surface->port().input_port().name())
-			);
-		
-		_output_bundle->add_channel (
-			surface->port().output_port().name(),
-			ARDOUR::DataType::MIDI,
-			session->engine().make_port_name_non_relative (surface->port().output_port().name())
-			);
+		if (!_device_info.uses_ipmidi()) {
+			_input_bundle->add_channel (
+				surface->port().input_port().name(),
+				ARDOUR::DataType::MIDI,
+				session->engine().make_port_name_non_relative (surface->port().input_port().name())
+				);
+			
+			_output_bundle->add_channel (
+				surface->port().output_port().name(),
+				ARDOUR::DataType::MIDI,
+				session->engine().make_port_name_non_relative (surface->port().output_port().name())
+				);
+		}
 
 		int fd;
 		MIDI::Port& input_port (surface->port().input_port());
-		
+
 		if ((fd = input_port.selectable ()) >= 0) {
 			Glib::RefPtr<IOSource> psrc = IOSource::create (fd, IO_IN|IO_HUP|IO_ERR);
 
@@ -1083,8 +1089,6 @@ MackieControlProtocol::midi_input_handler (IOCondition ioc, MIDI::Port* port)
 
 	if (ioc & IO_IN) {
 
-		CrossThreadChannel::drain (port->selectable());
-
 		DEBUG_TRACE (DEBUG::MidiIO, string_compose ("data available on %1\n", port->name()));
 		framepos_t now = session->engine().frame_time();
 		port->parse (now);
diff --git a/libs/surfaces/mackie/surface.cc b/libs/surfaces/mackie/surface.cc
index 5c6eb6d559..e08ba24a9e 100644
--- a/libs/surfaces/mackie/surface.cc
+++ b/libs/surfaces/mackie/surface.cc
@@ -109,8 +109,7 @@ Surface::~Surface ()
 	}
 	
 	delete _jog_wheel;
-
-	/* don't delete the port, because we want its output to remain queued */
+	delete _port;
 }
 
 const MidiByteArray& 
diff --git a/libs/surfaces/mackie/surface_port.cc b/libs/surfaces/mackie/surface_port.cc
index be080fa44b..645da67b43 100644
--- a/libs/surfaces/mackie/surface_port.cc
+++ b/libs/surfaces/mackie/surface_port.cc
@@ -25,6 +25,8 @@
 
 #include "midi++/types.h"
 #include "midi++/port.h"
+#include "midi++/jack_midi_port.h"
+#include "midi++/ipmidi_port.h"
 #include "midi++/manager.h"
 
 #include "ardour/debug.h"
@@ -51,38 +53,49 @@ using namespace PBD;
 SurfacePort::SurfacePort (Surface& s)
 	: _surface (&s)
 {
-	jack_client_t* jack = MackieControlProtocol::instance()->get_session().engine().jack();
-
-	_input_port = new MIDI::Port (string_compose (_("%1 in"),  _surface->name()), MIDI::Port::IsInput, jack);
-	_output_port =new MIDI::Port (string_compose (_("%1 out"), _surface->name()), MIDI::Port::IsOutput, jack);
-
-	/* MackieControl has its own thread for handling input from the input
-	 * port, and we don't want anything handling output from the output
-	 * port. This stops the Generic MIDI UI event loop in ardour from
-	 * attempting to handle these ports.
-	 */
-
-	_input_port->set_centrally_parsed (false);
-	_output_port->set_centrally_parsed (false);
-	
-	MIDI::Manager * mm = MIDI::Manager::instance();
-
-	mm->add_port (_input_port);
-	mm->add_port (_output_port);
+	if (_surface->mcp().device_info().uses_ipmidi()) {
+		_input_port = new MIDI::IPMIDIPort (MIDI::IPMIDIPort::lowest_ipmidi_port_default+_surface->number());
+		_output_port = _input_port;
+	} else {
+		jack_client_t* jack = MackieControlProtocol::instance()->get_session().engine().jack();
+		
+		_input_port = new MIDI::JackMIDIPort (string_compose (_("%1 in"),  _surface->name()), MIDI::Port::IsInput, jack);
+		_output_port =new MIDI::JackMIDIPort (string_compose (_("%1 out"), _surface->name()), MIDI::Port::IsOutput, jack);
+		
+		/* MackieControl has its own thread for handling input from the input
+		 * port, and we don't want anything handling output from the output
+		 * port. This stops the Generic MIDI UI event loop in ardour from
+		 * attempting to handle these ports.
+		 */
+		
+		_input_port->set_centrally_parsed (false);
+		_output_port->set_centrally_parsed (false);
+		
+		MIDI::Manager * mm = MIDI::Manager::instance();
+		
+		mm->add_port (_input_port);
+		mm->add_port (_output_port);
+	}
 }
 
 SurfacePort::~SurfacePort()
 {
-	MIDI::Manager* mm = MIDI::Manager::instance ();
-	
-	if (_input_port) {
-		mm->remove_port (_input_port);
+	if (_surface->mcp().device_info().uses_ipmidi()) {
 		delete _input_port;
-	}
+	} else {
 
-	if (_output_port) {
-		mm->remove_port (_output_port);
-		delete _output_port;
+		MIDI::Manager* mm = MIDI::Manager::instance ();
+		
+		if (_input_port) {
+			mm->remove_port (_input_port);
+			delete _input_port;
+		}
+		
+		if (_output_port) {
+			_output_port->drain (10000);
+			mm->remove_port (_output_port);
+			delete _output_port;
+		}
 	}
 }
 
diff --git a/libs/surfaces/mackie/surface_port.h b/libs/surfaces/mackie/surface_port.h
index 1a65d8dbcf..70b1df4580 100644
--- a/libs/surfaces/mackie/surface_port.h
+++ b/libs/surfaces/mackie/surface_port.h
@@ -59,8 +59,8 @@ protected:
 
 private:
 	Mackie::Surface* _surface;
-	MIDI::Port*      _input_port;
-	MIDI::Port*      _output_port;
+	MIDI::Port*  _input_port;
+	MIDI::Port*  _output_port;
 };	
 
 std::ostream& operator <<  (std::ostream& , const SurfacePort& port);
diff --git a/mcp/nucleus.device b/mcp/nucleus.device
index ce9a546d6b..1456d4e8a7 100644
--- a/mcp/nucleus.device
+++ b/mcp/nucleus.device
@@ -11,4 +11,5 @@
   <JogWheel value="yes"/>
   <TouchSenseFaders value="yes"/>
   <LogicControlButtons value="yes"/>
+  <UsesIPMIDI value="yes"/>
 </MackieProtocolDevice>