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realFFTData.H
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/* Copyright 2001,2002 Matt Flax <flatmax@ieee.org>
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This file is part of the MFFM FFTw Wrapper library.
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MFFM MFFM FFTw Wrapper library is free software; you can
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redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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MFFM FFTw Wrapper library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You have received a copy of the GNU General Public License
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along with the MFFM FFTw Wrapper library
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*/
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#ifndef REALFFTDATA_H_
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#define REALFFTDATA_H_
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#include "realFFT.H"
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#include <fftw3.h>
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#include <iostream>
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using namespace
std;
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#ifndef fftw_real
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#define fftw_real double
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#endif
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/// class realFFTData controls and manipulates fft data
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class
realFFTData
{
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/// Var used to specify if the memory was allocated by the realFFTData class
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int
deleteInOutMemory;
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public
:
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/// Specifies the size of the data array
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int
size
;
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/// Specifies the minimum and maximum power bins as used in the methods findMaxMinPowerBins and compPowerSpec
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int
minPowerBin
, maxPowerBin;
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/// the input, output and power_spectrum arrays
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fftw_real *
in
, *out, *power_spectrum;
//, *powerDeriv; power deriv. removed for now
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/// The total power (summed) of the power spectrum as used in the method compPowerSpec
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double
totalPower
;
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/// All memory to be allocated internally
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realFFTData
(
int
sz);
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/// input and output data arrays are to be allocated by another process
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realFFTData
(
int
sz, fftw_real*inp, fftw_real*outp);
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/// Deconstructor
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~
realFFTData
(
void
);
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/// Limits the maximum to 'lim' and returns the last fft bin with max
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int
limitHalfPowerSpec(
double
lim);
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/// Returns the number of elements in the input and output arrays
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int
getSize
(
void
){
return
size;}
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/// Returns the number of elements in the power spectrum array
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int
getHalfSize
(
void
){
if
(!(size%2))
return
size/2;
else
return
size/2+1;}
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/// Returns the maximum input variable
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fftw_real findMaxIn(
void
);
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/// Fills the max and min power spectrum bins
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void
findMaxMinPowerBins(
void
);
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/// This function computes the power spectrum and returns the max bin
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int
compPowerSpec();
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/// This function computes the square root of the power spectrum and returns the max bin
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int
sqrtPowerSpec();
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// int powerSpecDeriv(); // Find the derivative of the power spectrum
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/// This function zeros the output data array (out)
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void
zeroFFTData(
void
);
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};
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#endif // REALFFTDATA_H_
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