X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=blobdiff_plain;f=include%2Ffilter.h;h=0a610d6843370cb28443c5b582188715da046c24;hp=a0c4b4b15c57a7e627a51f4b15aec63026c06bb1;hb=9f29c8b32c972db1178d6f8551d5cd57ceb67083;hpb=d158a6da6ec776fe98961f73f2ea74cf55de4700 diff --git a/include/filter.h b/include/filter.h index a0c4b4b..0a610d6 100644 --- a/include/filter.h +++ b/include/filter.h @@ -7,9 +7,9 @@ ** 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 1.18 2000/08/03 09:57:33 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 @@ -37,12 +37,18 @@ #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: - static const int FILTER_INVALID; static const int FILTER_ABS_BANDLIMIT; // filter times |x| static const int FILTER_ABS_SINC; @@ -55,66 +61,34 @@ class SignalFilter { 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 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); - - 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; - - 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); @@ -135,88 +109,57 @@ class SignalFilter { 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 int convertDomainNameToID (const char* const domainName); static const char* convertDomainIDToName (const int idDomain); static const char* convertDomainIDToTitle (const int idDomain); - 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* 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