1 files changed, 94 insertions, 0 deletions
diff --git a/libs/ardour/jack_midi_port.cc b/libs/ardour/jack_midi_port.cc
new file mode 100644
index 0000000000..90ee93371d
--- /dev/null
+++ b/libs/ardour/jack_midi_port.cc
@@ -0,0 +1,94 @@
+/*
+    Copyright (C) 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.
+*/
+
+#include <cassert>
+#include <ardour/jack_midi_port.h>
+
+using namespace ARDOUR;
+JackMidiPort::JackMidiPort (const std::string& name, Flags flgs)
+	: JackPort (name, DataType::MIDI, flgs)
+	, MidiPort (4096) // FIXME FIXME FIXME Jack needs to tell us this
+	, _nframes_this_cycle(0)
+{
+}
+
+void
+JackMidiPort::cycle_start (nframes_t nframes)
+{
+	_buffer.clear();
+	assert(_buffer.size() == 0);
+
+	_nframes_this_cycle = nframes;
+
+	if (_flags & JackPortIsOutput) {
+		_buffer.silence(nframes);
+		assert(_buffer.size() == 0);
+		return;
+	}
+
+	// We're an input - copy Jack events to internal buffer
+	
+	void* jack_buffer = jack_port_get_buffer(_port, nframes);
+	const nframes_t event_count
+		= jack_midi_get_event_count(jack_buffer);
+
+	assert(event_count < _buffer.capacity());
+
+	jack_midi_event_t ev;
+
+	for (nframes_t i=0; i < event_count; ++i) {
+
+		jack_midi_event_get(&ev, jack_buffer, i);
+
+		_buffer.push_back(ev);
+	}
+
+	assert(_buffer.size() == event_count);
+
+	//if (_buffer.size() > 0)
+	//	cerr << "MIDIPort got " << event_count << " events." << endl;
+}
+
+void
+JackMidiPort::cycle_end()
+{
+	if (_flags & JackPortIsInput) {
+		_nframes_this_cycle = 0;
+		return;
+	}
+
+	// We're an output - copy events from internal buffer to Jack buffer
+	
+	void* jack_buffer = jack_port_get_buffer(_port, _nframes_this_cycle);
+
+	//const nframes_t event_count = _buffer.size();
+	//if (event_count > 0)
+	//	cerr << "MIDIPort writing " << event_count << " events." << endl;
+
+	jack_midi_clear_buffer(jack_buffer);
+
+	for (MidiBuffer::iterator i = _buffer.begin(); i != _buffer.end(); ++i) {
+		const MidiEvent& ev = *i;
+		// event times should be frames, relative to cycle start
+		assert(ev.time() >= 0);
+		assert(ev.time() < _nframes_this_cycle);
+		jack_midi_event_write(jack_buffer, (jack_nframes_t)ev.time(), ev.buffer(), ev.size());
+	}
+	
+	_nframes_this_cycle = 0;
+}