juce_FFT.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.
 
   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3
 
   Details of these licenses can be found at: www.gnu.org/licenses
 
   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 
   ------------------------------------------------------------------------------
 
   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.
 
  ==============================================================================
*/
 
class JUCE_API  FFT
{
public:
    FFT (int order, bool isInverse);
 
    ~FFT();
 
    struct Complex
    {
        float r;  
        float i;  
    };
 
    void perform (const Complex* input, Complex* output) const noexcept;
 
    void performRealOnlyForwardTransform (float* inputOutputData) const noexcept;
 
    void performRealOnlyInverseTransform (float* inputOutputData) const noexcept;
 
    void performFrequencyOnlyForwardTransform (float* inputOutputData) const noexcept;
 
    int getSize() const noexcept            { return size; }
 
private:
    struct FFTConfig;
    ScopedPointer<FFTConfig> config;
    const int size;
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FFT)
};