X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=blobdiff_plain;f=include%2Ffilter.h;h=7b696b29e8553fd89e99d2b7dd67fa53a72a1a47;hp=274d7920443ec1f7b5a8e7d67db607eab0ac1042;hb=ed576a069b0ba9de2e9153707012eba620ac606e;hpb=a95e41ac40cd2f3a4401d921618604cf33f2a904 diff --git a/include/filter.h b/include/filter.h index 274d792..7b696b2 100644 --- a/include/filter.h +++ b/include/filter.h @@ -1,38 +1,165 @@ +/***************************************************************************** +** FILE IDENTIFICATION +** +** Name: filter.h +** Purpose: Signal filter header file +** Programmer: Kevin Rosenberg +** Date Started: June 2000 +** +** This is part of the CTSim program +** Copyright (C) 1983-2000 Kevin Rosenberg +** +** $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 +** published by the Free Software Foundation. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU General Public License for more details. +** +** You should have received a copy of the GNU General Public License +** along with this program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +******************************************************************************/ + +#ifndef FILTER_H +#define FILTER_H + + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#ifdef HAVE_FFTW +#include +#include +#endif + + +// 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: - - SignalFilter (const FilterType filt_type, double bw, double xmin, double xmax, int n, double param, const DomainType domain, const int numInt); + 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; + + SignalFilter (const char* szFilterName, double dFilterMinimum, double dFilterMaximum, int nFilterPoints, double dBandwidth, double dFilterParam, const char* szDomainName); + + SignalFilter (const int idFilter, double dFilterMinimum, double dFilterMaximum, int nFilterPoints, double dBandwidth, double dFilterParam, const int idDomain); + + SignalFilter (const char* szFilterName, const char* szDomainName, double dBandwidth, double dFilterParam); ~SignalFilter (void); double* getFilter (void) const - { return m_vecFilter; } + { return m_adFilter; } - double convolve (const double f[], const double dx, const int n, const int np, const FunctionSymmetry func_type) const; + bool fail(void) const {return m_fail;} + const std::string& failMessage(void) const {return m_failMessage;} - double convolve (const float f[], const double dx, const int n, const int np, const FunctionSymmetry func_type) 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 double spatialResponseCalc (FilterType fType, double bw, double x, double param, int n); + 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; - static double spatialResponseAnalytic (FilterType fType, double bw, double x, double param); + double response (double x); - static double frequencyResponse (FilterType fType, double bw, double u, double param); + static double spatialResponse (int fType, double bw, double x, double param); - private: - double *m_vecFilter; - double m_bw; - FilterType m_filterType; + static double frequencyResponse (int fType, double bw, double u, double param); - double spatialResponseCalc (double x, double param, int n) const; + static double spatialResponseAnalytic (int fType, double bw, double x, double param); - double spatialResponseAnalytic (double x, double param) const; + static double spatialResponseCalc (int fType, double bw, double x, double param, int nIntegral); - double frequencyResponse (double u, double param) const; + 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); } + 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 integral_abscos (double u, double w); + 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 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: + int m_nFilterPoints; + 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; + 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 int filterID); + + void init (const int idFilter, double dFilterMin, double dFilterMax, int nFilterPoints, double dBandwidth, double dFilterParam, const int idDomain); + + void createFrequencyFilter (double* x) const; + void createSpatialFilter (double* x) const; + + 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