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diff --git a/src/libs/engine/MidiMessage.h b/src/libs/engine/MidiMessage.h
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+/* 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
+ */
+
+#ifndef MIDIMESSAGE_H
+#define MIDIMESSAGE_H
+
+namespace Om {
+
+
+/** Midi Message (the type a MIDI port connects to).
+ *
+ * For the time being (ie while it's still possible) this is binary
+ * compatible with jack_default_midi_event_t.  Don't mess that up without
+ * dealing with all the repercussions (in the MidiDriver's).
+ *
+ * Note that with the current implementation one of these is NOT valid
+ * across process cycles (since the buffer is just a pointer to the bufferr
+ * given to us by Jack itself.  In other words, if one of these needs to be
+ * stored, it needs to be deep copied.  Less copying anyway.. :/
+ */
+struct MidiMessage
+{
+public:
+	MidiMessage() : time(0), size(0), buffer(NULL) {}
+	
+	// Really just to allow setting to zero for generic algos
+	MidiMessage(const int& i) : time(0), size(0), buffer(NULL) {}
+
+	samplecount    time;
+    size_t         size;
+    unsigned char* buffer;
+};
+
+
+} // namespace Om
+
+
+#endif // MIDIMESSAGE_H