/********************************************************************************
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* Class FFTCalculator *
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* *
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* This class acts as a wrapper for the non-managed library FFTw, so it can be *
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* used in visual studio .net projects *
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* The FFTw library is an open-source library (www.FFTw.org). It does FFT *
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* calculations in different ways. For this project we use the most simple one *
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* to obtain the FFT of a one dimmensional vector. *
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* *
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* How to use the FFTCalculator class: *
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* 1 - When you create an FFTCalculator object, you must pass to the *
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* constructor the number of samples to analyze and pointers to the *
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* two buffers for the input signal and output FFT. The input signal *
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* must be a 16 bit signed integer array. The FFT is retourned as an *
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* array of floating-point doubles. *
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* 2 - To calculate the FFT, simply call the Calculate function. *
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* *
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* EQUITEL - C.V. February 2007 ALMDI *
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********************************************************************************/
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#include "Libreria FFtw\fftw3.h"
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#pragma once
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using namespace System;
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namespace FFTw_wrapper {
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public ref class FFTCalculator
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{
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public:
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//Constructor
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FFTCalculator(int NumeroDeMuestras, array<short>^ BufferEntrada, array<double>^ BufferSalida);
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//destructor
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~FFTCalculator();
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void Calculate();
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private:
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int mNumSamples;
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array<short>^ mBufin;
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array<double>^ mBufout;
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fftw_complex *in; //Internal buffers
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fftw_complex *out;
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fftw_plan p;
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};
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}
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