X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=include%2Ffilter.h;h=5f5789b6fa2e857d1271ff042f4f8414b6adbb44;hb=e4ffe82feebf1df2ac1dd14633818eb9a739863f;hp=274d7920443ec1f7b5a8e7d67db607eab0ac1042;hpb=a95e41ac40cd2f3a4401d921618604cf33f2a904;p=ctsim.git diff --git a/include/filter.h b/include/filter.h index 274d792..5f5789b 100644 --- a/include/filter.h +++ b/include/filter.h @@ -1,29 +1,163 @@ +/***************************************************************************** +** 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 1.6 2000/07/02 18:21:39 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 + class SignalFilter { public: - SignalFilter (const FilterType filt_type, double bw, double xmin, double xmax, int n, double param, const DomainType domain, const int numInt); + 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_FFT, + FILTER_METHOD_FFT_ZEROPAD_2, + FILTER_METHOD_FFT_ZEROPAD_4, + FILTER_METHOD_FFT_ZEROPAD_6 + } FilterMethodID; + + typedef enum { + DOMAIN_INVALID, + DOMAIN_FREQUENCY, + DOMAIN_SPATIAL + } DomainID; + + static const char FILTER_ABS_BANDLIMIT_STR[]= "abs_bandlimit"; + static const char FILTER_ABS_SINC_STR[]= "abs_sinc"; + static const char FILTER_ABS_COS_STR[]= "abs_cos"; + static const char FILTER_ABS_HAMMING_STR[]= "abs_hamming"; + static const char FILTER_SHEPP_STR[]= "shepp"; + static const char FILTER_BANDLIMIT_STR[]= "bandlimit"; + static const char FILTER_SINC_STR[]= "sinc"; + static const char FILTER_COS_STR[]= "cos"; + static const char FILTER_HAMMING_STR[]= "hamming"; + static const char FILTER_TRIANGLE_STR[]= "triangle"; + + static const char FILTER_METHOD_CONVOLUTION_STR[]= "convolution"; + static const char FILTER_METHOD_FOURIER_STR[]= "fourier"; + static const char FILTER_METHOD_FFT_STR[]= "fft"; + static const char FILTER_METHOD_FFT_ZEROPAD_2_STR[]="fft_zeropad2"; + static const char FILTER_METHOD_FFT_ZEROPAD_4_STR[]="fft_zeropad4"; + static const char FILTER_METHOD_FFT_ZEROPAD_6_STR[]="fft_zeropad6"; + + static const char DOMAIN_FREQUENCY_STR[]= "frequency"; + static const char DOMAIN_SPATIAL_STR[]= "spatial"; + + + SignalFilter (const char* filterName, const char* filterMethodName,double bw, double signalLength, int n, double param, const char* domainName, const int numIntegral = 0); + + SignalFilter (const FilterID filt_type, FilterMethodID filterMethodID, double bw, double signalLength, int n, double param, const DomainID domain, const int numIntegral = 0); + + SignalFilter (const char* filterName, const char* domainName, double bw, double param, int numIntegral = 0); ~SignalFilter (void); double* getFilter (void) const { return m_vecFilter; } - double convolve (const double f[], const double dx, const int n, const int np, const FunctionSymmetry func_type) const; + 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[], double dx, const int n) const; + void filterSignal (const float input[], double output[], double dx, const int n) const; + + static void finiteFourierTransform (const double input[], complex output[], const int n, const int direction); + + void finiteFourierTransform (const double input[], complex output[], const int direction) const; - double convolve (const float f[], const double dx, const int n, const int np, const FunctionSymmetry func_type) const; + bool fail(void) const {return m_fail;} + const string& failMessage(void) const {return m_failMessage;} - static double spatialResponseCalc (FilterType fType, double bw, double x, double param, int n); + 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;} - 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 (FilterID fType, double bw, double x, double param, int nIntegral = 0); + + static double frequencyResponse (FilterID fType, double bw, double u, double param); + + static double spatialResponseCalc (FilterID fType, double bw, double x, double param, int n); + + static double spatialResponseAnalytic (FilterID fType, double bw, double x, double param); private: - double *m_vecFilter; double m_bw; - FilterType m_filterType; - - double spatialResponseCalc (double x, double param, int n) const; + int m_nFilterPoints; + int m_nSignalPoints; + double m_signalLength; + double m_xmin; + double m_xmax; + double* m_vecFilter; + double* m_vecFourierCosTable; + double* m_vecFourierSinTable; + + 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_numIntegral; + + 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 xmin, double xmax, int n, double param, const DomainID domain, const int numInt); + +double spatialResponseCalc (double x, double param, int n) const; double spatialResponseAnalytic (double x, double param) const; @@ -36,3 +170,5 @@ class SignalFilter { }; + +#endif