** Date Started: June 2000
**
** This is part of the CTSim program
-** Copyright (C) 1983-2000 Kevin Rosenberg
+** Copyright (c) 1983-2001 Kevin Rosenberg
**
-** $Id: filter.h,v 1.19 2000/08/09 22:52:52 kevin Exp $
+** $Id: filter.h,v 1.24 2001/01/28 19:10:18 kevin Exp $
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License (version 2) as
#include <rfftw.h>
#endif
-#include <complex>
+// CLASS IDENTIFICATION
+// SignalFilter A filter used to process signals
+//
+// CONTAINS
+// signal vector
+//
+// Can create either a time/spatial waveform or a frequency signal
+// Waveforms can be created either by direct calculation or by inverse fourier transform
class SignalFilter {
public:
-
static const int FILTER_INVALID;
static const int FILTER_ABS_BANDLIMIT; // filter times |x|
static const int FILTER_ABS_SINC;
static const int FILTER_COSINE;
static const int FILTER_TRIANGLE;
- static const int FILTER_METHOD_INVALID;
- static const int FILTER_METHOD_CONVOLUTION;
- static const int FILTER_METHOD_FOURIER;
- static const int FILTER_METHOD_FOURIER_TABLE;
- static const int FILTER_METHOD_FFT;
-#if HAVE_FFTW
- static const int FILTER_METHOD_FFTW;
- static const int FILTER_METHOD_RFFTW;
-#endif
-
static const int DOMAIN_INVALID;
static const int DOMAIN_FREQUENCY;
static const int DOMAIN_SPATIAL;
- static const int FREQUENCY_FILTER_INVALID;
- static const int FREQUENCY_FILTER_DIRECT_FREQUENCY;
- static const int FREQUENCY_FILTER_INVERSE_SPATIAL;
-
- SignalFilter (const char* filterName, const char* filterMethodName,double bw, double signalIncrement, int n, double param, const char* domainName, const char* frequencyFilterName, const int zeropad = 0, const int preinterpolationFactor = 1);
+ SignalFilter (const char* szFilterName, double dFilterMinimum, double dFilterMaximum, int nFilterPoints, double dBandwidth, double dFilterParam, const char* szDomainName);
- SignalFilter (const int filt_type, int filterMethodID, double bw, double signalIncrement, int n, double param, const int domain, int filterFilterID, const int zeropad = 0, const int preinterpolationFactor = 1);
+ SignalFilter (const int idFilter, double dFilterMinimum, double dFilterMaximum, int nFilterPoints, double dBandwidth, double dFilterParam, const int idDomain);
- SignalFilter (const char* filterName, const char* domainName, double bw, double param);
+ SignalFilter (const char* szFilterName, const char* szDomainName, double dBandwidth, double dFilterParam);
~SignalFilter (void);
double* getFilter (void) const
- { return m_vecFilter; }
-
- int getNFilterPoints (void) const
- { return m_nFilterPoints; }
-
- double convolve (const double f[], const double dx, const int n, const int np) const;
-
- double convolve (const float f[], const double dx, const int n, const int np) const;
-
- void filterSignal (const double input[], double output[]) const;
- void filterSignal (const float input[], double output[]) const;
-
- static void finiteFourierTransform (const double input[], complex<double> output[], const int n, const int direction);
- static void finiteFourierTransform (const complex<double> input[], complex<double> output[], const int n, const int direction);
- static void finiteFourierTransform (const complex<double> input[], double output[], const int n, const int direction);
-
- void finiteFourierTransform (const double input[], complex<double> output[], const int direction) const;
- void finiteFourierTransform (const complex<double> input[], complex<double> output[], const int direction) const;
- void finiteFourierTransform (const complex<double> input[], double output[], const int direction) const;
-
- void setTraceLevel (int traceLevel) {m_traceLevel = traceLevel; }
+ { return m_adFilter; }
bool fail(void) const {return m_fail;}
- const string& failMessage(void) const {return m_failMessage;}
+ const std::string& failMessage(void) const {return m_failMessage;}
- const string& nameFilter(void) const { return m_nameFilter;}
- const string& nameDomain(void) const { return m_nameDomain;}
+ const std::string& nameFilter(void) const { return m_nameFilter;}
+ const std::string& nameDomain(void) const { return m_nameDomain;}
const int idFilter(void) const { return m_idFilter;}
const int idDomain(void) const { return m_idDomain;}
- const int idFrequencyFilter() const { return m_idFrequencyFilter;}
- const double getFilterMin(void) const {return m_filterMin;}
- const double getFilterMax(void) const {return m_filterMax;}
- const double getFilterIncrement(void) const {return m_filterInc;}
+
+ int getNFilterPoints (void) const { return m_nFilterPoints; }
+ const double getFilterMin(void) const {return m_dFilterMin;}
+ const double getFilterMax(void) const {return m_dFilterMax;}
+ const double getFilterIncrement(void) const {return m_dFilterInc;}
+ void copyFilterData(double *pdFilter, const int iStart, const int nPoints) const;
double response (double x);
static const char* convertFilterIDToName (const int idFilter);
static const char* convertFilterIDToTitle (const int idFilter);
- static const int getFilterMethodCount() {return s_iFilterMethodCount;}
- static const char** getFilterMethodNameArray() {return s_aszFilterMethodName;}
- static const char** getFilterMethodTitleArray() {return s_aszFilterMethodTitle;}
- static int convertFilterMethodNameToID (const char* const filterMethodName);
- static const char* convertFilterMethodIDToName (const int idFilterMethod);
- static const char* convertFilterMethodIDToTitle (const int idFilterMethod);
-
static const int getDomainCount() {return s_iDomainCount;}
static const char** getDomainNameArray() {return s_aszDomainName;}
static const char** getDomainTitleArray() {return s_aszDomainTitle;}
static const char* convertDomainIDToName (const int idDomain);
static const char* convertDomainIDToTitle (const int idDomain);
- static const int getFrequencyFilterCount() {return s_iFrequencyFilterCount;}
- static const char** getFrequencyFilterNameArray() {return s_aszFrequencyFilterName;}
- static const char** getFrequencyFilterTitleArray() {return s_aszFrequencyFilterTitle;}
- static int convertFrequencyFilterNameToID (const char* const ffName);
- static const char* convertFrequencyFilterIDToName (const int idFF);
- static const char* convertFrequencyFilterIDToTitle (const int idFF);
-
+ static double sinc (double x)
+ { return (fabs(x) > F_EPSILON ? (sin (x) / x) : 1.0); }
+
+ static double sinc (double x, double mult)
+ { return (fabs(x) > F_EPSILON ? (sin (x * mult) / x) : 1.0); }
+
private:
- double m_bw;
int m_nFilterPoints;
- int m_nSignalPoints;
- double m_signalInc;
- double m_filterMin;
- double m_filterMax;
- double m_filterInc;
- double* m_vecFilter;
- double* m_vecFourierCosTable;
- double* m_vecFourierSinTable;
- complex<double>* m_complexVecFilter;
-#ifdef HAVE_FFTW
- fftw_real* m_vecRealFftInput, *m_vecRealFftSignal;
- rfftw_plan m_realPlanForward, m_realPlanBackward;
- fftw_complex* m_vecComplexFftInput, *m_vecComplexFftSignal;
- fftw_plan m_complexPlanForward, m_complexPlanBackward;
-#endif
-
- bool m_fail;
- string m_failMessage;
- string m_nameFilter;
- string m_nameFilterMethod;
- string m_nameDomain;
- string m_nameFrequencyFilter;
+ double m_dBandwidth;
+ double m_dFilterParam;
+ double m_dFilterInc;
+ double m_dFilterMin;
+ double m_dFilterMax;
+ double* m_adFilter;
+
+ std::string m_nameFilter;
+ std::string m_nameDomain;
int m_idFilter;
- int m_idFilterMethod;
- int m_idFrequencyFilter;
int m_idDomain;
- double m_filterParam;
- int m_traceLevel;
- int m_zeropad;
- int m_nOutputPoints;
- int m_preinterpolationFactor;
+
+ bool m_fail;
+ std::string m_failMessage;
static const char* s_aszFilterName[];
static const char* s_aszFilterTitle[];
static const int s_iFilterCount;
- static const char* s_aszFilterMethodName[];
- static const char* s_aszFilterMethodTitle[];
- static const int s_iFilterMethodCount;
static const char* s_aszDomainName[];
static const char* s_aszDomainTitle[];
static const int s_iDomainCount;
- static const char* s_aszFrequencyFilterName[];
- static const char* s_aszFrequencyFilterTitle[];
- static const int s_iFrequencyFilterCount;
-
static int N_INTEGRAL;
static const bool haveAnalyticSpatial (const int filterID);
- void init (const int filt_type, const int filterMethod, double bw, double signalIncrement, int n, double param, const int domain, const int frequencyFilter, const int zeropad, const int preInterpScale);
-
- double spatialResponseCalc (double x, double param) const;
+ void init (const int idFilter, double dFilterMin, double dFilterMax, int nFilterPoints, double dBandwidth, double dFilterParam, const int idDomain);
- double spatialResponseAnalytic (double x, double param) const;
-
- double frequencyResponse (double u, double param) const;
-
- static double sinc (double x, double mult)
- { return (fabs(x) > F_EPSILON ? (sin (x * mult) / x) : 1.0); }
+ void createFrequencyFilter (double* x) const;
+ void createSpatialFilter (double* x) const;
- static double integral_abscos (double u, double w);
+ double spatialResponseCalc (double x) const;
+ double spatialResponseAnalytic (double x) const;
+ double frequencyResponse (double u) const;
+ static double integral_abscos (double u, double w)
+ { return (fabs (u) > F_EPSILON ? (cos (u * w) - 1) / (u * u) + w / u * sin (u * w) : (w * w / 2)); }
};
#endif
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