view base/test/TestPitch.h @ 1394:9ef1cc26024c

Add Range01 normalisation method to ColumnOp. This is the normalisation that is actually used in the Colour 3D Plot layer historically when column normalisation is enabled (not Max1 after all).

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef TEST_PITCH_H
#define TEST_PITCH_H

#include "../Pitch.h"
#include "../Preferences.h"

#include <QObject>
#include <QtTest>
#include <QDir>

#include <iostream>

using namespace std;

class TestPitch : public QObject
{
    Q_OBJECT

private slots:
    void init() {
	Preferences::getInstance()->setOctaveOfMiddleC(4);
	Preferences::getInstance()->setTuningFrequency(440);
    }

    void pitchLabel()
    {
	QCOMPARE(Pitch::getPitchLabel(60, 0, false), QString("C4"));
	QCOMPARE(Pitch::getPitchLabel(69, 0, false), QString("A4"));
	QCOMPARE(Pitch::getPitchLabel(61, 0, false), QString("C#4"));
	QCOMPARE(Pitch::getPitchLabel(61, 0, true), QString("Db4"));
	QCOMPARE(Pitch::getPitchLabel(59, 0, false), QString("B3"));
	QCOMPARE(Pitch::getPitchLabel(59, 0, true), QString("B3"));
	QCOMPARE(Pitch::getPitchLabel(0, 0, false), QString("C-1"));

	QCOMPARE(Pitch::getPitchLabel(60, -40, false), QString("C4-40c"));
	QCOMPARE(Pitch::getPitchLabel(60, 40, false), QString("C4+40c"));
	QCOMPARE(Pitch::getPitchLabel(58, 4, false), QString("A#3+4c"));

	Preferences::getInstance()->setOctaveOfMiddleC(3);

	QCOMPARE(Pitch::getPitchLabel(60, 0, false), QString("C3"));
	QCOMPARE(Pitch::getPitchLabel(69, 0, false), QString("A3"));
	QCOMPARE(Pitch::getPitchLabel(61, 0, false), QString("C#3"));
	QCOMPARE(Pitch::getPitchLabel(61, 0, true), QString("Db3"));
	QCOMPARE(Pitch::getPitchLabel(59, 0, false), QString("B2"));
	QCOMPARE(Pitch::getPitchLabel(59, 0, true), QString("B2"));
	QCOMPARE(Pitch::getPitchLabel(0, 0, false), QString("C-2"));

	QCOMPARE(Pitch::getPitchLabel(60, -40, false), QString("C3-40c"));
	QCOMPARE(Pitch::getPitchLabel(60, 40, false), QString("C3+40c"));
	QCOMPARE(Pitch::getPitchLabel(58, 4, false), QString("A#2+4c"));
    }

    void pitchLabelForFrequency()
    {
	QCOMPARE(Pitch::getPitchLabelForFrequency(440, 440, false), QString("A4"));
	QCOMPARE(Pitch::getPitchLabelForFrequency(440, 220, false), QString("A5"));
	QCOMPARE(Pitch::getPitchLabelForFrequency(261.63, 440, false), QString("C4"));
    }

#define MIDDLE_C 261.6255653005986

    void frequencyForPitch()
    {
	QCOMPARE(Pitch::getFrequencyForPitch(60, 0), MIDDLE_C);
	QCOMPARE(Pitch::getFrequencyForPitch(69, 0), 440.0);
	QCOMPARE(Pitch::getFrequencyForPitch(60, 0, 220), MIDDLE_C / 2.0);
	QCOMPARE(Pitch::getFrequencyForPitch(69, 0, 220), 220.0);
    }

    void pitchForFrequency()
    {
	double centsOffset = 0.0;
	QCOMPARE(Pitch::getPitchForFrequency(MIDDLE_C, &centsOffset), 60);
	QCOMPARE(centsOffset + 1.0, 1.0); // avoid ineffective fuzzy-compare to 0
	QCOMPARE(Pitch::getPitchForFrequency(261.0, &centsOffset), 60);
	QCOMPARE(int(centsOffset), -4);
	QCOMPARE(Pitch::getPitchForFrequency(440.0, &centsOffset), 69);
	QCOMPARE(centsOffset + 1.0, 1.0);
    }

    void pitchForFrequencyF()
    {
	float centsOffset = 0.f;
	QCOMPARE(Pitch::getPitchForFrequency(MIDDLE_C, &centsOffset), 60);
	QCOMPARE(centsOffset + 1.f, 1.f); // avoid ineffective fuzzy-compare to 0
	QCOMPARE(Pitch::getPitchForFrequency(261.0, &centsOffset), 60);
	QCOMPARE(int(centsOffset), -4);
	QCOMPARE(Pitch::getPitchForFrequency(440.0, &centsOffset), 69);
	QCOMPARE(centsOffset + 1.f, 1.f);
    }
};

#endif