juce_Windowing.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   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 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-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
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce
{
namespace dsp
{

template <typename FloatType>
class JUCE_API  WindowingFunction
{
public:
    //==============================================================================
    enum WindowingMethod
    {
        rectangular = 0,
        triangular,
        hann,
        hamming,
        blackman,
        blackmanHarris,
        flatTop,
        kaiser,
        numWindowingMethods
    };
 
    //==============================================================================
    WindowingFunction (size_t size, WindowingMethod,
                       bool normalise = true, FloatType beta = 0);
 
    //==============================================================================
    void fillWindowingTables (size_t size, WindowingMethod type,
                              bool normalise = true, FloatType beta = 0) noexcept;

    static void fillWindowingTables (FloatType* samples, size_t size, WindowingMethod,
                                     bool normalise = true, FloatType beta = 0) noexcept;

    void multiplyWithWindowingTable (FloatType* samples, size_t size) noexcept;

    static const char* getWindowingMethodName (WindowingMethod) noexcept;
 
 
private:
    //==============================================================================
    Array<FloatType> windowTable;
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (WindowingFunction)
};
 
} // namespace dsp
} // namespace juce