JUCE/examples/DSPDemo/Source/Demos/WaveShaperTanhDemo.cpp

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-privacy-policy

   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
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  ==============================================================================
*/

#include "../DSPDemo.h"

//==============================================================================
// @@ START_DEMO
struct WaveShaperTanhDemo
{
    void prepare (const ProcessSpec&) {}

    void process (const ProcessContextReplacing<float>& context)
    {
        shapers[currentShaperIdx].process (context);
    }

    void reset()
    {
        for (auto&& shaper : shapers)
            shaper.reset();
    }

    void updateParameters()
    {
        currentShaperIdx = jmin (numElementsInArray (shapers), accuracy.getCurrentSelectedID() - 1);
    }

    //==============================================================================
    WaveShaper<float> shapers[2] { { std::tanh }, { FastMathApproximations::tanh } };
    int currentShaperIdx = 0;

    ChoiceParameter accuracy {{ "No Approximation", "Use fast-math approximation"}, 1, "Accuracy" };
    std::vector<DSPDemoParameterBase*> parameters { &accuracy };  // no params for this demo
};
// @@ END_DEMO

RegisterDSPDemo<WaveShaperTanhDemo> waveshaperDemo ("WaveShaperTanh", BinaryData::WaveShaperTanhDemo_cpp);