juce_LogRampedValue_test.cpp

/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
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   licensing.
 
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   End User License Agreement: www.juce.com/juce-7-licence
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   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce::dsp
{
 
static CommonSmoothedValueTests <LogRampedValue <float>> commonLogRampedValueTests;
 
class LogRampedValueTests final : public UnitTest
{
public:
    LogRampedValueTests()
        : UnitTest ("LogRampedValueTests", UnitTestCategories::dsp)
    {}
 
    void runTest() override
    {
        beginTest ("Curve");
        {
            Array<double> levels = { -0.12243, -1.21245, -12.2342, -22.4683, -30.0, -61.18753 };
 
            for (auto level : levels)
            {
                Array<Range<double>> ranges = { Range<double> (0.0,    1.0),
                                                Range<double> (-2.345, 0.0),
                                                Range<double> (-2.63,  3.56),
                                                Range<double> (3.3,    -0.2) };
 
                for (auto range : ranges)
                {
                    LogRampedValue<double> slowStart { range.getStart() } , fastStart { range.getEnd() };
 
                    auto numSamples = 12;
                    slowStart.reset (numSamples);
                    fastStart.reset (numSamples);
 
                    slowStart.setLogParameters (level, true);
                    fastStart.setLogParameters (level, false);
 
                    slowStart.setTargetValue (range.getEnd());
                    fastStart.setTargetValue (range.getStart());
 
                    AudioBuffer<double> results (2, numSamples + 1);
 
                    results.setSample (0, 0, slowStart.getCurrentValue());
                    results.setSample (1, 0, fastStart.getCurrentValue());
 
                    for (int i = 1; i < results.getNumSamples(); ++i)
                    {
                        results.setSample (0, i, slowStart.getNextValue());
                        results.setSample (1, i, fastStart.getNextValue());
                    }
 
                    for (int i = 0; i < results.getNumSamples(); ++i)
                        expectWithinAbsoluteError (results.getSample (0, i),
                                                   results.getSample (1, results.getNumSamples() - (i + 1)),
                                                   1.0e-7);
 
                    auto expectedMidpoint = range.getStart() + (range.getLength() * Decibels::decibelsToGain (level));
                    expectWithinAbsoluteError (results.getSample (0, numSamples / 2),
                                               expectedMidpoint,
                                               1.0e-7);
                }
            }
        }
    }
};
 
static LogRampedValueTests LogRampedValueTests;
 
} // namespace juce::dsp