VocalEasel/Sources/VLPitchTransformer.mm

//
// File: VLPitchTransformer.mm - Bindings helper for MIDI pitch
//
// Author(s):
//
//      (MN)    Matthias Neeracher
//
// Copyright © 2006-2007 Matthias Neeracher
//

#import "VLPitchTransformer.h"
#import "VLModel.h"

@implementation VLPitchTransformer

+ (Class)transformedValueClass
{
	return [NSString class];
}

const char * sPitch2Name = "C D EF G A B";

- (NSString *)transformedValue:(id)value
{
	int pitch = [value intValue];
	int octave= (pitch / 12)-1;
	pitch %= 12;
	if (sPitch2Name[pitch] == ' ')
		return [NSString stringWithFormat:@"%c%C%d / %c%C%d", 
						 sPitch2Name[pitch-1], kVLSharpChar, octave, 
						 sPitch2Name[pitch+1], kVLFlatChar, octave];
	else
		return [NSString stringWithFormat:@"%c%d",
						 sPitch2Name[pitch], octave];
}

@end