X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=blobdiff_plain;f=include%2Ffilter.h;h=7b696b29e8553fd89e99d2b7dd67fa53a72a1a47;hp=5527b3eaddabf57cd094809de8db781cf042d3e1;hb=ed576a069b0ba9de2e9153707012eba620ac606e;hpb=27a474e0622ebb7229fd5705552021f63d8f932d diff --git a/include/filter.h b/include/filter.h index 5527b3e..7b696b2 100644 --- a/include/filter.h +++ b/include/filter.h @@ -9,7 +9,7 @@ ** This is part of the CTSim program ** Copyright (C) 1983-2000 Kevin Rosenberg ** -** $Id: filter.h,v 1.15 2000/07/20 11:17:31 kevin Exp $ +** $Id: filter.h,v 1.23 2001/01/12 21:53:27 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 @@ -37,204 +37,129 @@ #include #endif -#include +// 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: - - typedef enum { - FILTER_INVALID, - FILTER_BANDLIMIT, - FILTER_SINC, - FILTER_G_HAMMING, - FILTER_COSINE, - FILTER_TRIANGLE, - FILTER_ABS_BANDLIMIT, // filter times |x| - FILTER_ABS_SINC, - FILTER_ABS_G_HAMMING, - FILTER_ABS_COSINE, - FILTER_SHEPP - } FilterID; - - typedef enum { - FILTER_METHOD_INVALID, - FILTER_METHOD_CONVOLUTION, - FILTER_METHOD_FOURIER, - FILTER_METHOD_FOURIER_TABLE, - FILTER_METHOD_FFT, -#if HAVE_FFTW - FILTER_METHOD_FFTW, - FILTER_METHOD_RFFTW, -#endif - } FilterMethodID; - - typedef enum { - DOMAIN_INVALID, - DOMAIN_FREQUENCY, - DOMAIN_SPATIAL - } DomainID; - - // Filters - static const char FILTER_ABS_BANDLIMIT_STR[]; - static const char FILTER_ABS_SINC_STR[]; - static const char FILTER_ABS_COS_STR[]; - static const char FILTER_ABS_HAMMING_STR[]; - static const char FILTER_SHEPP_STR[]; - static const char FILTER_BANDLIMIT_STR[]; - static const char FILTER_SINC_STR[]; - static const char FILTER_COS_STR[]; - static const char FILTER_HAMMING_STR[]; - static const char FILTER_TRIANGLE_STR[]; - - static const char FILTER_ABS_BANDLIMIT_TITLE_STR[]; - static const char FILTER_ABS_SINC_TITLE_STR[]; - static const char FILTER_ABS_COS_TITLE_STR[]; - static const char FILTER_ABS_HAMMING_TITLE_STR[]; - static const char FILTER_SHEPP_TITLE_STR[]; - static const char FILTER_BANDLIMIT_TITLE_STR[]; - static const char FILTER_SINC_TITLE_STR[]; - static const char FILTER_COS_TITLE_STR[]; - static const char FILTER_HAMMING_TITLE_STR[]; - static const char FILTER_TRIANGLE_TITLE_STR[]; + static const int FILTER_INVALID; + static const int FILTER_ABS_BANDLIMIT; // filter times |x| + static const int FILTER_ABS_SINC; + static const int FILTER_ABS_G_HAMMING; + static const int FILTER_ABS_COSINE; + static const int FILTER_SHEPP; + static const int FILTER_BANDLIMIT; + static const int FILTER_SINC; + static const int FILTER_G_HAMMING; + static const int FILTER_COSINE; + static const int FILTER_TRIANGLE; + + static const int DOMAIN_INVALID; + static const int DOMAIN_FREQUENCY; + static const int DOMAIN_SPATIAL; - // Filter Methods - static const char FILTER_METHOD_CONVOLUTION_STR[]; - static const char FILTER_METHOD_FOURIER_STR[]; - static const char FILTER_METHOD_FOURIER_TABLE_STR[]; - static const char FILTER_METHOD_FFT_STR[]; -#if HAVE_FFTW - static const char FILTER_METHOD_FFTW_STR[]; - static const char FILTER_METHOD_RFFTW_STR[]; -#endif - - static const char FILTER_METHOD_CONVOLUTION_TITLE_STR[]; - static const char FILTER_METHOD_FOURIER_TITLE_STR[]; - static const char FILTER_METHOD_FOURIER_TABLE_TITLE_STR[]; - static const char FILTER_METHOD_FFT_TITLE_STR[]; -#if HAVE_FFTW - static const char FILTER_METHOD_FFTW_TITLESTR[]; - static const char FILTER_METHOD_RFFTW_TITLE_STR[]; -#endif + SignalFilter (const char* szFilterName, double dFilterMinimum, double dFilterMaximum, int nFilterPoints, double dBandwidth, double dFilterParam, const char* szDomainName); - // Domains - static const char DOMAIN_FREQUENCY_STR[]; - static const char DOMAIN_SPATIAL_STR[]; + SignalFilter (const int idFilter, double dFilterMinimum, double dFilterMaximum, int nFilterPoints, double dBandwidth, double dFilterParam, const int idDomain); - static const char DOMAIN_FREQUENCY_TITLE_STR[]; - static const char DOMAIN_SPATIAL_TITLE_STR[]; - - - SignalFilter (const char* filterName, const char* filterMethodName,double bw, double signalIncrement, int n, double param, const char* domainName, const int zeropad = 0, const int preinterpolationFactor = 1); - - SignalFilter (const FilterID filt_type, FilterMethodID filterMethodID, double bw, double signalIncrement, int n, double param, const DomainID domain, const int zeropad = 0, const int preinterpolationFactor = 1); - - 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; } + { return m_adFilter; } - 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; + bool fail(void) const {return m_fail;} + const std::string& failMessage(void) const {return m_failMessage;} - void filterSignal (const double input[], double output[]) const; - void filterSignal (const float input[], double output[]) const; + 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;} - static void finiteFourierTransform (const double input[], complex output[], const int n, const int direction); - static void finiteFourierTransform (const complex input[], complex output[], const int n, const int direction); - static void finiteFourierTransform (const complex input[], double output[], const int n, const int direction); + 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; - void finiteFourierTransform (const double input[], complex output[], const int direction) const; - void finiteFourierTransform (const complex input[], complex output[], const int direction) const; - void finiteFourierTransform (const complex input[], double output[], const int direction) const; + double response (double x); - void setTraceLevel (int traceLevel) {m_traceLevel = traceLevel; } + static double spatialResponse (int fType, double bw, double x, double param); - bool fail(void) const {return m_fail;} - const string& failMessage(void) const {return m_failMessage;} + static double frequencyResponse (int fType, double bw, double u, double param); - const string& nameFilter(void) const { return m_nameFilter;} - const string& nameDomain(void) const { return m_nameDomain;} - const FilterID idFilter(void) const { return m_idFilter;} - const DomainID idDomain(void) const { return m_idDomain;} - const double getFilterMin(void) const {return m_filterMin;} - const double getFilterMax(void) const {return m_filterMax;} - const double getFilterIncrement(void) const {return m_filterInc;} + static double spatialResponseAnalytic (int fType, double bw, double x, double param); - double response (double x); + static double spatialResponseCalc (int fType, double bw, double x, double param, int nIntegral); - static double spatialResponse (FilterID fType, double bw, double x, double param); + static void setNumIntegral(int nIntegral) {N_INTEGRAL = nIntegral;} - static double frequencyResponse (FilterID fType, double bw, double u, double param); + static const int getFilterCount() {return s_iFilterCount;} + static const char** getFilterNameArray() {return s_aszFilterName;} + static const char** getFilterTitleArray() {return s_aszFilterTitle;} + static int convertFilterNameToID (const char* const filterName); + static const char* convertFilterIDToName (const int idFilter); + static const char* convertFilterIDToTitle (const int idFilter); - static double spatialResponseAnalytic (FilterID fType, double bw, double x, double param); + static const int getDomainCount() {return s_iDomainCount;} + static const char** getDomainNameArray() {return s_aszDomainName;} + static const char** getDomainTitleArray() {return s_aszDomainTitle;} + static int convertDomainNameToID (const char* const domainName); + static const char* convertDomainIDToName (const int idDomain); + static const char* convertDomainIDToTitle (const int idDomain); - static double spatialResponseCalc (FilterID fType, double bw, double x, double param, int nIntegral); + static double sinc (double x) + { return (fabs(x) > F_EPSILON ? (sin (x) / x) : 1.0); } - static void setNumIntegral(int nIntegral) {N_INTEGRAL = nIntegral;} + 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* 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 + 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_idDomain; bool m_fail; - string m_failMessage; - string m_nameFilter; - string m_nameFilterMethod; - string m_nameDomain; - FilterID m_idFilter; - FilterMethodID m_idFilterMethod; - DomainID m_idDomain; - double m_filterParam; - int m_traceLevel; - int m_zeropad; - int m_nOutputPoints; - int m_preinterpolationFactor; - + std::string m_failMessage; + + static const char* s_aszFilterName[]; + static const char* s_aszFilterTitle[]; + static const int s_iFilterCount; + static const char* s_aszDomainName[]; + static const char* s_aszDomainTitle[]; + static const int s_iDomainCount; static int N_INTEGRAL; - static const bool haveAnalyticSpatial (const FilterID filterID); - static const FilterID convertFilterNameToID (const char* filterName); - static const char* convertFilterIDToName (const FilterID filterID); - static const FilterMethodID convertFilterMethodNameToID (const char* filterMethodName); - static const char* convertFilterMethodIDToName (const FilterMethodID filterMethodID); - static const DomainID convertDomainNameToID (const char* domainName); - static const char* convertDomainIDToName (const DomainID domainID); - - void init (const FilterID filt_type, const FilterMethodID filterMethod, double bw, double signalIncrement, int n, double param, const DomainID domain, const int zeropad, const int preInterpScale); + static const bool haveAnalyticSpatial (const int filterID); - 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