view base/test/TestLogRange.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_LOG_RANGE_H
#define TEST_LOG_RANGE_H

#include "../LogRange.h"

#include <QObject>
#include <QtTest>

#include <iostream>
#include <cmath>

using namespace std;

class TestLogRange : public QObject
{
    Q_OBJECT

private slots:

    void mapPositiveAboveDefaultThreshold()
    {
        QCOMPARE(LogRange::map(10.0), 1.0);
        QCOMPARE(LogRange::map(100.0), 2.0);
        QCOMPARE(LogRange::map(0.1), -1.0);
        QCOMPARE(LogRange::map(1.0), 0.0);
        QCOMPARE(LogRange::map(0.0000001), -7.0);
        QCOMPARE(LogRange::map(20.0), log10(20.0));
    }
    
    void mapPositiveAboveSetThreshold()
    {
        QCOMPARE(LogRange::map(10.0, -10.0), 1.0);
        QCOMPARE(LogRange::map(100.0, 1.0), 2.0);
        QCOMPARE(LogRange::map(0.1, -5.0), -1.0);
        QCOMPARE(LogRange::map(1.0, -0.01), 0.0);
        QCOMPARE(LogRange::map(0.0000001, -20.0), -7.0);
        QCOMPARE(LogRange::map(20.0, 0.0), log10(20.0));
    }

    void mapZeroDefaultThreshold()
    {
        QCOMPARE(LogRange::map(0.0), -10.0);
    }

    void mapZeroSetThreshold()
    {
        QCOMPARE(LogRange::map(0.0, 12.0), 12.0);
        QCOMPARE(LogRange::map(0.0, -12.0), -12.0);
        QCOMPARE(LogRange::map(0.0, 0.0), 0.0);
    }
    
    void mapPositiveBelowDefaultThreshold()
    {
        // The threshold is used only for zero values, not for very
        // small ones -- it's arguably a stand-in or replacement value
        // rather than a threshold. So this should behave the same as
        // for values above the threshold.
        QCOMPARE(LogRange::map(1e-10), -10.0);
        QCOMPARE(LogRange::map(1e-20), -20.0);
        QCOMPARE(LogRange::map(1e-100), -100.0);
    }

    void mapPositiveBelowSetThreshold()
    {
        // As above
        QCOMPARE(LogRange::map(10.0, 4.0), 1.0);
        QCOMPARE(LogRange::map(1e-10, 4.0), -10.0);
        QCOMPARE(LogRange::map(1e-20, -15.0), -20.0);
        QCOMPARE(LogRange::map(1e-100, -100.0), -100.0);
    }

    void mapNegative()
    {
        // Should always return map of absolute value. These are
        // picked from vaarious of the above tests.
        
        QCOMPARE(LogRange::map(-10.0), 1.0);
        QCOMPARE(LogRange::map(-100.0), 2.0);
        QCOMPARE(LogRange::map(-0.1), -1.0);
        QCOMPARE(LogRange::map(-1.0), 0.0);
        QCOMPARE(LogRange::map(-0.0000001), -7.0);
        QCOMPARE(LogRange::map(-20.0), log10(20.0));
        QCOMPARE(LogRange::map(-10.0, 4.0), 1.0);
        QCOMPARE(LogRange::map(-1e-10, 4.0), -10.0);
        QCOMPARE(LogRange::map(-1e-20, -15.0), -20.0);
        QCOMPARE(LogRange::map(-1e-100, -100.0), -100.0);
        QCOMPARE(LogRange::map(-0.0, 12.0), 12.0);
        QCOMPARE(LogRange::map(-0.0, -12.0), -12.0);
        QCOMPARE(LogRange::map(-0.0, 0.0), 0.0);
    }

    void unmap()
    {
        // Simply pow(10, x)

        QCOMPARE(LogRange::unmap(0.0), 1.0);
        QCOMPARE(LogRange::unmap(1.0), 10.0);
        QCOMPARE(LogRange::unmap(-1.0), 0.1);
        QCOMPARE(LogRange::unmap(100.0), 1e+100);
        QCOMPARE(LogRange::unmap(-100.0), 1e-100);
    }

    void mapRangeAllPositiveDefaultThreshold()
    {
        double min, max;

        min = 1.0; max = 10.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, 0.0); QCOMPARE(max, 1.0);

        min = 10.0; max = 1.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, 0.0); QCOMPARE(max, 1.0);

        // if equal, the function uses an arbitrary 1.0 range before mapping
        min = 10.0; max = 10.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, 1.0); QCOMPARE(max, log10(11.0));
    }

    void mapRangeAllPositiveSetThreshold()
    {
        double min, max;

        min = 1.0; max = 10.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, 0.0); QCOMPARE(max, 1.0);

        min = 10.0; max = 1.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, 0.0); QCOMPARE(max, 1.0);

        // if equal, the function uses an arbitrary 1.0 range before mapping
        min = 10.0; max = 10.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, 1.0); QCOMPARE(max, log10(11.0));
    }

    void mapRangeAllNegativeDefaultThreshold()
    {
        double min, max;

        min = -1.0; max = -10.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, 0.0); QCOMPARE(max, 1.0);

        min = -10.0; max = -1.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, 0.0); QCOMPARE(max, 1.0);

        // if equal, the function uses an arbitrary 1.0 range before mapping
        min = -10.0; max = -10.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, log10(9.0)); QCOMPARE(max, 1.0);
    }
    
    void mapRangeAllNegativeSetThreshold()
    {
        double min, max;

        min = -1.0; max = -10.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, 0.0); QCOMPARE(max, 1.0);

        min = -10.0; max = -1.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, 0.0); QCOMPARE(max, 1.0);

        // if equal, the function uses an arbitrary 1.0 range before mapping
        min = -10.0; max = -10.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, log10(9.0)); QCOMPARE(max, 1.0);
    }
    
    void mapRangeAllNonNegativeDefaultThreshold()
    {
        double min, max;

        min = 0.0; max = 10.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 1.0);

        min = 10.0; max = 0.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 1.0);

        // if equal, the function uses an arbitrary 1.0 range before mapping
        min = 0.0; max = 0.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 0.0);
    }
    
    void mapRangeAllNonNegativeSetThreshold()
    {
        double min, max;

        min = 0.0; max = 10.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 1.0);

        min = 10.0; max = 0.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 1.0);

        // if equal, the function uses an arbitrary 1.0 range before mapping
        min = 0.0; max = 0.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 0.0);
    }
    
    void mapRangeAllNonPositiveDefaultThreshold()
    {
        double min, max;

        min = 0.0; max = -10.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 1.0);

        min = -10.0; max = 0.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 1.0);
    }
    
    void mapRangeAllNonPositiveSetThreshold()
    {
        double min, max;

        min = 0.0; max = -10.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 1.0);

        min = -10.0; max = 0.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 1.0);
    }
    
    void mapRangeSpanningZeroDefaultThreshold()
    {
        double min, max;

        min = -1.0; max = 10.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 1.0);

        min = -100.0; max = 1.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 2.0);

        min = -10.0; max = 1e-200;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 1.0);

        min = 1e-200; max = -10.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 1.0);

        min = -1e-200; max = 100.0;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 2.0);

        min = 10.0; max = -1e-200;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -10.0); QCOMPARE(max, 1.0);

        // if none of the input range is above the threshold in
        // magnitude, but it still spans zero, we use the input max as
        // threshold and then add 1 for range
        min = -1e-200; max = 1e-300;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -201.0); QCOMPARE(max, -200.0);

        min = 1e-200; max = -1e-300;
        LogRange::mapRange(min, max);
        QCOMPARE(min, -201.0); QCOMPARE(max, -200.0);
    }
    
    void mapRangeSpanningZeroSetThreshold()
    {
        double min, max;

        min = -1.0; max = 10.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 1.0);

        min = -100.0; max = 1.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 2.0);

        min = -10.0; max = 1e-200;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 1.0);

        min = 1e-200; max = -10.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 1.0);

        min = -1e-200; max = 100.0;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 2.0);

        min = 10.0; max = -1e-200;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -4.0); QCOMPARE(max, 1.0);

        // if none of the input range is above the threshold in
        // magnitude, but it still spans zero, we use the input max as
        // threshold and then add 1 for range
        min = -1e-200; max = 1e-300;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -201.0); QCOMPARE(max, -200.0);

        min = 1e-200; max = -1e-300;
        LogRange::mapRange(min, max, -4.0);
        QCOMPARE(min, -201.0); QCOMPARE(max, -200.0);
    }
    
};

#endif