X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=include%2Ffilter.h;h=7a50a7dc1682042129e475d43cd3dee6dd6cc39b;hb=53c732778ed19ac5231bb17c7e5bd4d2201d9456;hp=9bbf554873cb6cad0d37eb3994075dcba5c2e4e4;hpb=08f34bf3ba14d4f436f4d2ef0ee5af1d6eb266ac;p=ctsim.git diff --git a/include/filter.h b/include/filter.h index 9bbf554..7a50a7d 100644 --- a/include/filter.h +++ b/include/filter.h @@ -1,7 +1,33 @@ +/***************************************************************************** +** 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 1.7 2000/07/03 11:02:06 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: @@ -18,10 +44,20 @@ class SignalFilter { 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_FREQ, + DOMAIN_FREQUENCY, DOMAIN_SPATIAL } DomainID; @@ -36,13 +72,20 @@ class SignalFilter { static const char FILTER_HAMMING_STR[]= "hamming"; static const char FILTER_TRIANGLE_STR[]= "triangle"; - static const char DOMAIN_FREQ_STR[]= "freq"; + 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, double bw, double xmin, double xmax, int n, double param, const char* domainName, const int numIntegral = 0); + SignalFilter (const char* filterName, const char* filterMethodName,double bw, double signalIncrement, int n, double param, const char* domainName, const int numIntegral = 0); - SignalFilter (const FilterID filt_type, double bw, double xmin, double xmax, int n, double param, const DomainID domain, const int numIntegral = 0); + SignalFilter (const FilterID filt_type, FilterMethodID filterMethodID, double bw, double signalIncrement, 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); @@ -51,10 +94,20 @@ class SignalFilter { 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 float input[], complex output[], const int n, const int direction); + + void finiteFourierTransform (const float input[], complex output[], const int direction) const; + bool fail(void) const {return m_fail;} const string& failMessage(void) const {return m_failMessage;} @@ -62,6 +115,9 @@ class SignalFilter { 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;} double response (double x); @@ -75,25 +131,35 @@ class SignalFilter { private: double m_bw; - int m_nPoints; - double m_xmin; - double m_xmax; + 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; + 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 FilterID convertFilterNameToID (const char* filterName); + 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, double bw, double xmin, double xmax, int n, double param, const DomainID domain, const int numInt); + void init (const FilterID filt_type, const FilterMethodID filterMethod, double bw, double signalIncrement, int n, double param, const DomainID domain, const int numInt); double spatialResponseCalc (double x, double param, int n) const;