Offload most Midi processing from Song into MidiTime class

src/core/CMakeLists.txt

@@ -82,6 +82,7 @@ set(LMMS_SRCS
 	core/midi/MidiController.cpp
 	core/midi/MidiOss.cpp
 	core/midi/MidiPort.cpp
+	core/midi/MidiTime.cpp
 	core/midi/MidiWinMM.cpp
 
 	PARENT_SCOPE

src/core/midi/MidiTime.cpp

@@ -0,0 +1,49 @@
+/*
+ * MidiTime.cpp - Class that encapsulates the position of a note/event in terms of
+ *   its bar, beat and tick.
+ *
+ * Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net
+ *
+ * This file is part of LMMS - http://lmms.io
+ *
+ * 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 (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include "MidiTime.h"
+
+#include "MeterModel.h"
+
+TimeSig::TimeSig( int num, int denom ) :
+	m_num(num),
+	m_denom(denom)
+{
+}
+
+TimeSig::TimeSig( const MeterModel &model ) :
+	m_num(model.getNumerator()),
+	m_denom(model.getDenominator())
+{
+}
+
+int TimeSig::numerator() const
+{
+	return m_num;
+}
+int TimeSig::denominator() const
+{
+	return m_denom;
+}