1 files changed, 60 insertions, 0 deletions
diff --git a/src/midiprocessor.cc b/src/midiprocessor.cc
new file mode 100644
index 0000000..1cf9f49
--- /dev/null
+++ b/src/midiprocessor.cc
@@ -0,0 +1,60 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            midiprocessor.cc
+ *
+ *  Thu May 12 09:41:25 CEST 2016
+ *  Copyright 2016 Christian Glöckner
+ *  cgloeckner@freenet.de
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "midiprocessor.h"
+
+MidiProcessor::MidiProcessor(MidiMapper& midi_mapper)
+	: midi_mapper{midi_mapper} {
+}
+
+bool MidiProcessor::operator()(std::size_t size, unsigned char const * buffer, event_t& out) {
+	if (size != 3u) {
+		// not enough data
+		return false;
+	}
+	
+	// determine event type
+	switch (buffer[0] & 0xF0) {
+		case 0x90:
+			out.type = TYPE_ONSET;
+			break;
+			
+		default:
+			// yet unsupported type
+			return false;
+	}
+	
+	// lookup instrument
+	int instr = midi_mapper.lookup(buffer[1]);
+	if (instr == -1) {
+		// key does not map to an instrument
+		return false;
+	}
+	
+	out.instrument = (std::size_t)instr;
+	out.velocity = buffer[2] / 127.0;
+	return true;
+}