Added Om aka Graph aka god knows what

git-svn-id: http://svn.drobilla.net/lad/grauph@9 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 124 insertions, 0 deletions

diff --git a/src/engine/MidiTriggerNode.cpp b/src/engine/MidiTriggerNode.cpp
new file mode 100644
index 00000000..4fda80e7
--- /dev/null
+++ b/src/engine/MidiTriggerNode.cpp
@@ -0,0 +1,124 @@
+/* This file is part of Om.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Om 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.
+ * 
+ * Om 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 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.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "MidiTriggerNode.h"
+#include <cmath>
+#include "InputPort.h"
+#include "OutputPort.h"
+#include "PortInfo.h"
+#include "Plugin.h"
+#include "util.h"
+#include "midi.h"
+
+namespace Om {
+
+
+MidiTriggerNode::MidiTriggerNode(const string& path, size_t poly, Patch* parent, samplerate srate, size_t buffer_size)
+: InternalNode(path, 1, parent, srate, buffer_size)
+{
+	m_num_ports = 5;
+	m_ports.alloc(m_num_ports);
+
+	m_midi_in_port = new InputPort<MidiMessage>(this, "MIDI In", 0, 1,
+		new PortInfo("MIDI In", MIDI, INPUT), m_buffer_size);
+	m_ports.at(0) = m_midi_in_port;
+	
+	m_note_port = new InputPort<sample>(this, "Note Number", 1, 1,
+		new PortInfo("Note Number", CONTROL, INPUT, INTEGER, 60, 0, 127), 1);
+	m_ports.at(1) = m_note_port;
+	
+	m_gate_port = new OutputPort<sample>(this, "Gate", 2, 1,
+		new PortInfo("Gate", AUDIO, OUTPUT, 0, 0, 1), m_buffer_size);
+	m_ports.at(2) = m_gate_port;
+
+	m_trig_port = new OutputPort<sample>(this, "Trigger", 3, 1,
+		new PortInfo("Trigger", AUDIO, OUTPUT, 0, 0, 1), m_buffer_size);
+	m_ports.at(3) = m_trig_port;
+	
+	m_vel_port = new OutputPort<sample>(this, "Velocity", 4, poly,
+		new PortInfo("Velocity", AUDIO, OUTPUT, 0, 0, 1), m_buffer_size);
+	m_ports.at(4) = m_vel_port;
+	
+	m_plugin.type(Plugin::Internal);
+	m_plugin.plug_label("trigger_in");
+	m_plugin.name("Om Trigger Node (MIDI, OSC)");
+}
+
+
+void
+MidiTriggerNode::run(size_t nframes)
+{
+	InternalNode::run(nframes);
+	
+	MidiMessage ev;
+	
+	for (size_t i=0; i < m_midi_in_port->buffer(0)->filled_size(); ++i) {
+		ev = m_midi_in_port->buffer(0)->value_at(i);
+
+		switch (ev.buffer[0] & 0xF0) {
+		case MIDI_CMD_NOTE_ON:
+			if (ev.buffer[2] == 0)
+				note_off(ev.buffer[1], ev.time);
+			else
+				note_on(ev.buffer[1], ev.buffer[2], ev.time);
+			break;
+		case MIDI_CMD_NOTE_OFF:
+			note_off(ev.buffer[1], ev.time);
+			break;
+		case MIDI_CMD_CONTROL:
+			if (ev.buffer[1] == MIDI_CTL_ALL_NOTES_OFF
+					|| ev.buffer[1] == MIDI_CTL_ALL_SOUNDS_OFF)
+				m_gate_port->buffer(0)->set(0.0f, ev.time);
+		default:
+			break;
+		}
+	}
+}
+
+
+void
+MidiTriggerNode::note_on(uchar note_num, uchar velocity, samplecount offset)
+{
+	//std::cerr << "Note on starting at sample " << offset << std::endl;
+	assert(offset < m_buffer_size);
+
+	const sample filter_note = m_note_port->buffer(0)->value_at(0);
+	if (filter_note >= 0.0 && filter_note < 127.0 && (note_num == (uchar)filter_note)){
+				
+		// See comments in MidiNoteNode::note_on (FIXME)
+		if (offset == (samplecount)(m_buffer_size-1))
+			--offset;
+		
+		m_gate_port->buffer(0)->set(1.0f, offset);
+		m_trig_port->buffer(0)->set(1.0f, offset, offset);
+		m_trig_port->buffer(0)->set(0.0f, offset+1);
+		m_vel_port->buffer(0)->set(velocity/127.0f, offset);
+	}
+}
+
+
+void
+MidiTriggerNode::note_off(uchar note_num, samplecount offset)
+{
+	assert(offset < m_buffer_size);
+
+	if (note_num == lrintf(m_note_port->buffer(0)->value_at(0)))
+		m_gate_port->buffer(0)->set(0.0f, offset);
+}
+
+
+} // namespace Om
+