Normalize volume 100% to MIDI velocity 63

Furthermore moved midiVelocity() to Note and removed global volumeToMidi()
helper method.

Closes #280.

include/MidiEvent.h

@@ -28,6 +28,7 @@
 #include <cstdlib>
 #include "Midi.h"
 #include "panning_constants.h"
+#include "volume.h"
 
 class MidiEvent
 {
@@ -141,7 +142,7 @@ public:
 
 	volume_t volume() const
 	{
-		return (volume_t)( velocity() * 100 / MidiMaxVelocity );
+		return (volume_t)( velocity() * MaxVolume / MidiMaxVelocity );
 	}
 
 	const void* sourcePort() const

include/NotePlayHandle.h

@@ -68,11 +68,6 @@ public:
 	virtual void setVolume( volume_t volume );
 	virtual void setPanning( panning_t panning );
 
-	int midiVelocity() const
-	{
-		return volumeToMidi( getVolume() );
-	}
-
 	int midiKey() const;
 	int midiChannel() const
 	{

include/note.h

@@ -176,6 +176,11 @@ public:
 		return m_volume;
 	}
 
+	int midiVelocity() const
+	{
+		return qMin( MidiMaxVelocity, getVolume() * MidiMaxVelocity / MaxVolume );
+	}
+
 	inline panning_t getPanning() const
 	{
 		return m_panning;

include/volume.h

@@ -40,10 +40,4 @@ typedef struct
 	float vol[2];
 } stereoVolumeVector;
 
-
-inline int volumeToMidi( volume_t vol )
-{
-	return qMin( MidiMaxVelocity, vol * MidiMaxVelocity / DefaultVolume );
-}
-
 #endif