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diff --git a/src/libs/engine/MidiTriggerNode.hpp b/src/libs/engine/MidiTriggerNode.hpp
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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef MIDITRIGGERNODE_H
+#define MIDITRIGGERNODE_H
+
+#include <string>
+#include "InternalNode.hpp"
+#include "MidiBuffer.hpp"
+
+using std::string;
+
+namespace Ingen {
+
+class InputPort;
+class OutputPort;
+
+
+/** MIDI trigger input node.
+ *
+ * Just has a gate,  for drums etc.  A control port is used to select
+ * which note number is responded to.
+ *
+ * Note that this node is always monophonic, the poly parameter is ignored.
+ * (Should that change?)
+ *
+ * \ingroup engine
+ */
+class MidiTriggerNode : public InternalNode
+{
+public:
+	MidiTriggerNode(const string& path, size_t poly, Patch* parent, SampleRate srate, size_t buffer_size);
+
+	void process(SampleCount nframes, FrameTime start, FrameTime end);
+	
+	void note_on(uchar note_num, uchar velocity, FrameTime time, SampleCount nframes, FrameTime start, FrameTime end);
+	void note_off(uchar note_num, FrameTime time, SampleCount nframes, FrameTime start, FrameTime end);
+
+private:
+	InputPort*  _midi_in_port;
+	InputPort*  _note_port;
+	OutputPort* _gate_port;
+	OutputPort* _trig_port;
+	OutputPort* _vel_port;
+};
+
+
+} // namespace Ingen
+
+#endif // MIDITRIGGERNODE_H