/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 This class demonstrates how to use the Accelerate framework to take Fast Fourier Transforms (FFT) of the audio data. FFTs are used to perform analysis on the captured audio data

 */

#ifndef __aurioTouch3__FFTHelper__

#define __aurioTouch3__FFTHelper__

#include <Accelerate/Accelerate.h>

class FFTHelper

{

public:

    FFTHelper( UInt32 inMaxFramesPerSlice );

    ~FFTHelper();

    void ComputeFFT ( Float32* inAudioData, Float32* outFFTData );

private:

    FFTSetup            mSpectrumAnalysis;

    DSPSplitComplex     mDspSplitComplex;

    Float32             mFFTNormFactor;

    UInt32              mFFTLength;

    UInt32              mLog2N;

};

#endif /* defined(__aurioTouch3__FFTHelper__) */