1 files changed, 91 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..6d8e4c8c5d
--- /dev/null
+++ b/libs/ardour/jack_midi_port.cc
@@ -0,0 +1,91 @@
+/*
+    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, MidiBuffer* buf)
+	: Port (name, flgs)
+	, JackPort (name, DataType::MIDI, flgs)
+	, BaseMidiPort (name, flgs) 
+{
+	// MIDI ports always need a buffer since jack buffer format is different
+	assert(buf);
+
+	_buffer = buf;
+	_own_buffer = false;
+}
+
+void
+JackMidiPort::cycle_start (nframes_t nframes, nframes_t offset)
+{
+	/* FIXME: offset */
+
+	_buffer->clear();
+	assert(_buffer->size() == 0);
+
+	if (_flags & IsOutput) {
+		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 << "JackMIDIPort got " << event_count << " events (buf " << _buffer << ")" << endl;*/
+}
+
+void
+JackMidiPort::cycle_end (nframes_t nframes, nframes_t offset)
+{
+	/* FIXME: offset */
+
+	if (_flags & IsInput) {
+		return;
+	}
+
+	// We're an output - copy events from source buffer to Jack buffer
+	
+	void* jack_buffer = jack_port_get_buffer (_port, nframes);
+
+	jack_midi_clear_buffer (jack_buffer);
+
+	for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
+		const MIDI::Event& ev = *i;
+		// event times should be frames, relative to cycle start
+		assert(ev.time() >= 0);
+		assert(ev.time() < nframes);
+		jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
+	}
+}