1 files changed, 150 insertions, 0 deletions
diff --git a/libs/ardour/midi_ui.cc b/libs/ardour/midi_ui.cc
new file mode 100644
index 0000000000..5a0640b3f6
--- /dev/null
+++ b/libs/ardour/midi_ui.cc
@@ -0,0 +1,150 @@
+/*
+  Copyright (C) 2009 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.
+
+*/
+#include <cstdlib>
+
+#include "pbd/pthread_utils.h"
+
+#include "midi++/manager.h"
+#include "midi++/port.h"
+
+#include "ardour/debug.h"
+#include "ardour/audioengine.h"
+#include "ardour/midi_ui.h"
+#include "ardour/session.h"
+#include "ardour/session_event.h"
+#include "ardour/types.h"
+
+using namespace std;
+using namespace ARDOUR;
+using namespace Glib;
+
+#include "i18n.h"
+
+BaseUI::RequestType MidiControlUI::PortChange = BaseUI::new_request_type();
+
+#include "pbd/abstract_ui.cc"  /* instantiate the template */
+
+MidiControlUI::MidiControlUI (Session& s)
+	: AbstractUI<MidiUIRequest> (_("midiui"))
+	, _session (s) 
+{
+	MIDI::Manager::instance()->PortsChanged.connect (mem_fun (*this, &MidiControlUI::change_midi_ports));
+}
+
+MidiControlUI::~MidiControlUI ()
+{
+	clear_ports ();
+}
+
+void
+MidiControlUI::do_request (MidiUIRequest* req)
+{
+	if (req->type == PortChange) {
+
+		/* restart event loop with new ports */
+		DEBUG_TRACE (DEBUG::MidiIO, "reset ports\n");
+		reset_ports ();
+
+	} else if (req->type == CallSlot) {
+
+		req->the_slot ();
+	}
+}
+
+void
+MidiControlUI::change_midi_ports ()
+{
+	MidiUIRequest* req = get_request (PortChange);
+	if (req == 0) {
+		return;
+	}
+	send_request (req);
+}
+
+bool
+MidiControlUI::midi_input_handler (IOCondition ioc, MIDI::Port* port)
+{
+	if (ioc & ~IO_IN) {
+		return false;
+	}
+
+	if (ioc & IO_IN) {
+
+		if (port->must_drain_selectable()) {
+			CrossThreadChannel::drain (port->selectable());
+		}
+
+		DEBUG_TRACE (DEBUG::MidiIO, string_compose ("data available on %1\n", port->name()));
+		nframes64_t now = _session.engine().frame_time();
+		port->parse (now);
+	}
+
+	return true;
+}
+
+void
+MidiControlUI::clear_ports ()
+{
+	for (PortSources::iterator i = port_sources.begin(); i != port_sources.end(); ++i) {
+		/* remove existing sources from the event loop */
+		(*i)->destroy ();
+	}
+
+	port_sources.clear ();
+}
+
+void
+MidiControlUI::reset_ports ()
+{
+	clear_ports ();
+
+	MIDI::Manager::PortList plist = MIDI::Manager::instance()->get_midi_ports ();
+
+	for (MIDI::Manager::PortList::iterator i = plist.begin(); i != plist.end(); ++i) {
+		int fd;
+		if ((fd = (*i)->selectable ()) >= 0) {
+			Glib::RefPtr<IOSource> psrc = IOSource::create (fd, IO_IN|IO_HUP|IO_ERR);
+			psrc->connect (bind (mem_fun (*this, &MidiControlUI::midi_input_handler), (*i)));
+			port_sources.push_back (psrc);
+		} 
+	}
+
+	for (PortSources::iterator i = port_sources.begin(); i != port_sources.end(); ++i) {
+		(*i)->attach (_main_loop->get_context());
+	}
+}
+
+void
+MidiControlUI::thread_init ()
+{	
+	struct sched_param rtparam;
+
+	PBD::notify_gui_about_thread_creation (X_("gui"), pthread_self(), X_("MIDI"), 2048);
+	SessionEvent::create_per_thread_pool (X_("MIDI I/O"), 128);
+
+	memset (&rtparam, 0, sizeof (rtparam));
+	rtparam.sched_priority = 9; /* XXX should be relative to audio (JACK) thread */
+
+	if (pthread_setschedparam (pthread_self(), SCHED_FIFO, &rtparam) != 0) {
+		// do we care? not particularly.
+	}
+
+	reset_ports ();
+}
+