QFFT.hh

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00001 
00011 #ifndef __QFFT_HH_
00012 #define __QFFT_HH_
00013 
00014 #include "QVector.hh"
00015 
00016 #include <gsl/gsl_fft_halfcomplex.h>
00017 #include <gsl/gsl_fft_complex.h>
00018 #include <gsl/gsl_errno.h>
00019 #include <string>
00020 #include <gsl/gsl_sf.h>
00021 
00022 Q_BEGIN_NAMESPACE
00023 
00024 class QFFT {
00025 
00026     public:
00028         enum WindowType {
00029             WT_None = 0,
00030             WT_Welch = 1,
00031             WT_Rect = 2,
00032             WT_Hann = 3,
00033             WT_Hamming = 4,
00034             WT_Cosinus = 5,
00035             WT_BlackmanHarris = 6,
00036             WT_Kaiser3 = 7,
00037         }; 
00038 
00040         static QVector FFTAntiSym(const QVector& input);
00042         static QVector FFTSym(const QVector& input);
00044         static QVector ZeroPad(const QVector& input,size_t n_zeros, bool isSym = false, double zeroVal = 0.);
00046         static WindowType StrToWindowType(const std::string& winName);
00048         static QVector GetWindow(WindowType wt, size_t size, size_t zeros = 0,bool coherent = false);
00050         static QVector CutSides(const QVector& input, size_t ncut, bool isSym);
00051 
00056             QFFT( const int size);
00060             QFFT();
00064             virtual ~QFFT();
00070             virtual int Transform(const QVector& data, QVector& result) = 0;
00075             virtual void Resize(int s) = 0;
00081             virtual void SetWindowType(WindowType wt, bool coherent = false) = 0;
00087             void SetForward(bool isForward){fForward = isForward;}
00093             void SetNormalized(bool isNormalized){fNormalized = isNormalized;}
00099             int GetWindow(){return fWindowType;}
00100 
00101     protected:
00102 
00103             void IsPowerOf2();
00104             int fSize; 
00105             bool fForward;
00106             bool fNormalized;
00107             bool fIsPowerOf2;
00108             double* fData;
00109             double* fWindow;
00110             int fWindowSize;
00111             WindowType fWindowType;
00112 
00113 };
00114 
00115 Q_END_NAMESPACE
00116 #endif

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