** This is part of the CTSim program
** Copyright (C) 1983-2000 Kevin Rosenberg
**
-** $Id: filter.cpp,v 1.19 2000/07/20 11:17:31 kevin Exp $
+** $Id: filter.cpp,v 1.20 2000/07/22 15:45:33 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
#include "ct.h"
-
int SignalFilter::N_INTEGRAL=500; //static member
-// Filters
-const char SignalFilter::FILTER_ABS_BANDLIMIT_STR[] = "abs_bandlimit";
-const char SignalFilter::FILTER_ABS_SINC_STR[] = "abs_sinc";
-const char SignalFilter::FILTER_ABS_COS_STR[] = "abs_cos";
-const char SignalFilter::FILTER_ABS_HAMMING_STR[] = "abs_hamming";
-const char SignalFilter::FILTER_SHEPP_STR[] = "shepp";
-const char SignalFilter::FILTER_BANDLIMIT_STR[] = "bandlimit";
-const char SignalFilter::FILTER_SINC_STR[] = "sinc";
-const char SignalFilter::FILTER_COS_STR[] = "cos";
-const char SignalFilter::FILTER_HAMMING_STR[] = "hamming";
-const char SignalFilter::FILTER_TRIANGLE_STR[] = "triangle";
-
-const char SignalFilter::FILTER_ABS_BANDLIMIT_TITLE_STR[] = "Abs(w) * Bandlimit";
-const char SignalFilter::FILTER_ABS_SINC_TITLE_STR[] = "Abs(w) * Sinc";
-const char SignalFilter::FILTER_ABS_COS_TITLE_STR[] = "Abs(w) * Cos";
-const char SignalFilter::FILTER_ABS_HAMMING_TITLE_STR[] = "Abs(w) * Hamming";
-const char SignalFilter::FILTER_SHEPP_TITLE_STR[] = "Shepp";
-const char SignalFilter::FILTER_BANDLIMIT_TITLE_STR[] = "Bandlimit";
-const char SignalFilter::FILTER_SINC_TITLE_STR[] = "Sinc";
-const char SignalFilter::FILTER_COS_TITLE_STR[] = "Cos";
-const char SignalFilter::FILTER_HAMMING_TITLE_STR[] = "Hamming";
-const char SignalFilter::FILTER_TRIANGLE_TITLE_STR[] = "Triangle";
-
-// Filter Methods
-const char SignalFilter::FILTER_METHOD_CONVOLUTION_STR[] = "convolution";
-const char SignalFilter::FILTER_METHOD_FOURIER_STR[] = "fourier";
-const char SignalFilter::FILTER_METHOD_FOURIER_TABLE_STR[] = "fourier_table";
-const char SignalFilter::FILTER_METHOD_FFT_STR[] = "fft";
+const int SignalFilter::FILTER_INVALID = -1 ;
+const int SignalFilter::FILTER_BANDLIMIT = 0;
+const int SignalFilter::FILTER_SINC = 1;
+const int SignalFilter::FILTER_G_HAMMING = 2;
+const int SignalFilter::FILTER_COSINE = 3;
+const int SignalFilter::FILTER_TRIANGLE = 4;
+const int SignalFilter::FILTER_ABS_BANDLIMIT = 5; // filter times |x = |
+const int SignalFilter::FILTER_ABS_SINC = 6;
+const int SignalFilter::FILTER_ABS_G_HAMMING = 7;
+const int SignalFilter::FILTER_ABS_COSINE = 8;
+const int SignalFilter::FILTER_SHEPP = 9;
+
+const char* SignalFilter::s_aszFilterName[] = {
+ {"bandlimit"},
+ {"sinc"},
+ {"hamming"},
+ {"cosine"},
+ {"triangle"},
+ {"abs_bandlimit"},
+ {"abs_sinc"},
+ {"abs_hamming"},
+ {"abs_cosine"},
+ {"shepp"},
+};
+
+const char* SignalFilter::s_aszFilterTitle[] = {
+ {"Bandlimit"},
+ {"Sinc"},
+ {"Hamming"},
+ {"Cosine"},
+ {"Triangle"},
+ {"Abs(w) * Bandlimit"},
+ {"Abs(w) * Sinc"},
+ {"Abs(w) * Hamming"},
+ {"Abs(w) * Cosine"},
+ {"Shepp"},
+};
+
+const int SignalFilter::s_iFilterCount = sizeof(s_aszFilterName) / sizeof(const char*);
+
+const int SignalFilter::FILTER_METHOD_INVALID = -1;
+const int SignalFilter::FILTER_METHOD_CONVOLUTION = 0;
+const int SignalFilter::FILTER_METHOD_FOURIER = 1;
+const int SignalFilter::FILTER_METHOD_FOURIER_TABLE = 2;
+const int SignalFilter::FILTER_METHOD_FFT = 3;
+#if HAVE_FFTW
+const int SignalFilter::FILTER_METHOD_FFTW = 4;
+const int SignalFilter::FILTER_METHOD_RFFTW =5 ;
+#endif
+
+const char* SignalFilter::s_aszFilterMethodName[] = {
+ {"convolution"},
+ {"fourier"},
+ {"fouier_table"},
+ {"fft"},
#if HAVE_FFTW
-const char SignalFilter::FILTER_METHOD_FFTW_STR[] = "fftw";
-const char SignalFilter::FILTER_METHOD_RFFTW_STR[] = "rfftw";
+ {"fftw"},
+ {"rfftw"},
#endif
+};
-const char SignalFilter::FILTER_METHOD_CONVOLUTION_TITLE_STR[] = "Convolution";
-const char SignalFilter::FILTER_METHOD_FOURIER_TITLE_STR[] = "Direct Fourier";
-const char SignalFilter::FILTER_METHOD_FOURIER_TABLE_TITLE_STR[] = "Fourier Trig Table";
-const char SignalFilter::FILTER_METHOD_FFT_TITLE_STR[] = "FFT";
+const char* SignalFilter::s_aszFilterMethodTitle[] = {
+ {"Convolution"},
+ {"Direct Fourier"},
+ {"Fouier Trigometric Table Lookout"},
+ {"FFT"},
#if HAVE_FFTW
-const char SignalFilter::FILTER_METHOD_FFTW_TITLESTR[] = "FFTW";
-const char SignalFilter::FILTER_METHOD_RFFTW_TITLE_STR[] = "Real FFTW";
+ {"FFTW"},
+ {"Real/Half-Complex FFTW"},
#endif
+};
-// Domains
-const char SignalFilter::DOMAIN_FREQUENCY_STR[] = "frequency";
-const char SignalFilter::DOMAIN_SPATIAL_STR[] = "spatial";
+const int SignalFilter::s_iFilterMethodCount = sizeof(s_aszFilterMethodName) / sizeof(const char*);
-const char SignalFilter::DOMAIN_FREQUENCY_TITLE_STR[] = "Frequency";
-const char SignalFilter::DOMAIN_SPATIAL_TITLE_STR[] = "Spatial";
+
+const int SignalFilter::DOMAIN_INVALID = -1;
+const int SignalFilter::DOMAIN_FREQUENCY = 0;
+const int SignalFilter::DOMAIN_SPATIAL = 1;
+
+const char* SignalFilter::s_aszDomainName[] = {
+ {"frequency"},
+ {"spatial"},
+};
+
+const char* SignalFilter::s_aszDomainTitle[] = {
+ {"Frequency"},
+ {"Spatial"},
+};
+
+const int SignalFilter::s_iDomainCount = sizeof(s_aszDomainName) / sizeof(const char*);
/* NAME
init (m_idFilter, m_idFilterMethod, bw, signalIncrement, nSignalPoints, param, m_idDomain, zeropad, preinterpolationFactor);
}
-SignalFilter::SignalFilter (const FilterID filterID, const FilterMethodID filterMethodID, double bw, double signalIncrement, int nSignalPoints, double param, const DomainID domainID, int zeropad = 0, int preinterpolationFactor = 1)
+SignalFilter::SignalFilter (const int filterID, const int filterMethodID, double bw, double signalIncrement, int nSignalPoints, double param, const int domainID, int zeropad = 0, int preinterpolationFactor = 1)
{
init (filterID, filterMethodID, bw, signalIncrement, nSignalPoints, param, domainID, zeropad, preinterpolationFactor);
}
}
void
-SignalFilter::init (const FilterID filterID, const FilterMethodID filterMethodID, double bw, double signalIncrement, int nSignalPoints, double filterParam, const DomainID domainID, int zeropad, int preinterpolationFactor)
+SignalFilter::init (const int filterID, const int filterMethodID, double bw, double signalIncrement, int nSignalPoints, double filterParam, const int domainID, int zeropad, int preinterpolationFactor)
{
m_bw = bw;
m_idFilter = filterID;
}
-const SignalFilter::FilterID
+int
SignalFilter::convertFilterNameToID (const char *filterName)
{
- FilterID filterID = FILTER_INVALID;
-
- if (strcasecmp (filterName, FILTER_BANDLIMIT_STR) == 0)
- filterID = FILTER_BANDLIMIT;
- else if (strcasecmp (filterName, FILTER_HAMMING_STR) == 0)
- filterID = FILTER_G_HAMMING;
- else if (strcasecmp (filterName, FILTER_SINC_STR) == 0)
- filterID = FILTER_SINC;
- else if (strcasecmp (filterName, FILTER_COS_STR) == 0)
- filterID = FILTER_COSINE;
- else if (strcasecmp (filterName, FILTER_TRIANGLE_STR) == 0)
- filterID = FILTER_TRIANGLE;
- else if (strcasecmp (filterName, FILTER_ABS_BANDLIMIT_STR) == 0)
- filterID = FILTER_ABS_BANDLIMIT;
- else if (strcasecmp (filterName, FILTER_ABS_HAMMING_STR) == 0)
- filterID = FILTER_ABS_G_HAMMING;
- else if (strcasecmp (filterName, FILTER_ABS_SINC_STR) == 0)
- filterID = FILTER_ABS_SINC;
- else if (strcasecmp (filterName, FILTER_ABS_COS_STR) == 0)
- filterID = FILTER_ABS_COSINE;
- else if (strcasecmp (filterName, FILTER_SHEPP_STR) == 0)
- filterID = FILTER_SHEPP;
+ int filterID = FILTER_INVALID;
+
+ for (int i = 0; i < s_iFilterCount; i++)
+ if (strcasecmp (filterName, s_aszFilterName[i]) == 0) {
+ filterID = i;
+ break;
+ }
return (filterID);
}
const char *
-SignalFilter::convertFilterIDToName (const FilterID filterID)
+SignalFilter::convertFilterIDToName (const int filterID)
{
- const char *name = "";
-
- if (filterID == FILTER_SHEPP)
- name = FILTER_SHEPP_STR;
- else if (filterID == FILTER_ABS_COSINE)
- name = FILTER_ABS_COS_STR;
- else if (filterID == FILTER_ABS_SINC)
- name = FILTER_ABS_SINC_STR;
- else if (filterID == FILTER_ABS_G_HAMMING)
- name = FILTER_ABS_HAMMING_STR;
- else if (filterID == FILTER_ABS_BANDLIMIT)
- name = FILTER_ABS_BANDLIMIT_STR;
- else if (filterID == FILTER_COSINE)
- name = FILTER_COS_STR;
- else if (filterID == FILTER_SINC)
- name = FILTER_SINC_STR;
- else if (filterID == FILTER_G_HAMMING)
- name = FILTER_HAMMING_STR;
- else if (filterID == FILTER_BANDLIMIT)
- name = FILTER_BANDLIMIT_STR;
- else if (filterID == FILTER_TRIANGLE)
- name = FILTER_TRIANGLE_STR;
-
+ static const char *name = "";
+
+ if (filterID >= 0 && filterID < s_iFilterCount)
+ return (s_aszFilterName [filterID]);
+
return (name);
}
+
+const char *
+SignalFilter::convertFilterIDToTitle (const int filterID)
+{
+ static const char *title = "";
+
+ if (filterID >= 0 && filterID < s_iFilterCount)
+ return (s_aszFilterTitle [filterID]);
+
+ return (title);
+}
-const SignalFilter::FilterMethodID
+int
SignalFilter::convertFilterMethodNameToID (const char* const filterMethodName)
{
- FilterMethodID fmID = FILTER_METHOD_INVALID;
-
- if (strcasecmp (filterMethodName, FILTER_METHOD_CONVOLUTION_STR) == 0)
- fmID = FILTER_METHOD_CONVOLUTION;
- else if (strcasecmp (filterMethodName, FILTER_METHOD_FOURIER_STR) == 0)
- fmID = FILTER_METHOD_FOURIER;
- else if (strcasecmp (filterMethodName, FILTER_METHOD_FOURIER_TABLE_STR) == 0)
- fmID = FILTER_METHOD_FOURIER_TABLE;
- else if (strcasecmp (filterMethodName, FILTER_METHOD_FFT_STR) == 0)
- fmID = FILTER_METHOD_FFT;
-#if HAVE_FFTW
- else if (strcasecmp (filterMethodName, FILTER_METHOD_FFTW_STR) == 0)
- fmID = FILTER_METHOD_FFTW;
- else if (strcasecmp (filterMethodName, FILTER_METHOD_RFFTW_STR) == 0)
- fmID = FILTER_METHOD_RFFTW;
-#endif
+ int fmID = FILTER_METHOD_INVALID;
+
+ for (int i = 0; i < s_iFilterMethodCount; i++)
+ if (strcasecmp (filterMethodName, s_aszFilterMethodName[i]) == 0) {
+ fmID = i;
+ break;
+ }
return (fmID);
}
const char *
-SignalFilter::convertFilterMethodIDToName (const FilterMethodID fmID)
+SignalFilter::convertFilterMethodIDToName (const int fmID)
{
- const char *name = "";
-
- if (fmID == FILTER_METHOD_CONVOLUTION)
- return (FILTER_METHOD_CONVOLUTION_STR);
- else if (fmID == FILTER_METHOD_FOURIER)
- return (FILTER_METHOD_FOURIER_STR);
- else if (fmID == FILTER_METHOD_FOURIER_TABLE)
- return (FILTER_METHOD_FOURIER_TABLE_STR);
- else if (fmID == FILTER_METHOD_FFT)
- return (FILTER_METHOD_FFT_STR);
-#if HAVE_FFTW
- else if (fmID == FILTER_METHOD_FFTW)
- return (FILTER_METHOD_FFTW_STR);
- else if (fmID == FILTER_METHOD_RFFTW)
- return (FILTER_METHOD_RFFTW_STR);
-#endif
+ static const char *name = "";
+
+ if (fmID >= 0 && fmID < s_iFilterMethodCount)
+ return (s_aszFilterName [fmID]);
return (name);
}
-const SignalFilter::DomainID
+const char *
+SignalFilter::convertFilterMethodIDToTitle (const int fmID)
+{
+ static const char *title = "";
+
+ if (fmID >= 0 && fmID < s_iFilterMethodCount)
+ return (s_aszFilterTitle [fmID]);
+
+ return (title);
+}
+
+int
SignalFilter::convertDomainNameToID (const char* const domainName)
{
- DomainID dID = DOMAIN_INVALID;
+ int dID = DOMAIN_INVALID;
- if (strcasecmp (domainName, DOMAIN_SPATIAL_STR) == 0)
- dID = DOMAIN_SPATIAL;
- else if (strcasecmp (domainName, DOMAIN_FREQUENCY_STR) == 0)
- dID = DOMAIN_FREQUENCY;
+ for (int i = 0; i < s_iDomainCount; i++)
+ if (strcasecmp (domainName, s_aszDomainName[i]) == 0) {
+ dID = i;
+ break;
+ }
return (dID);
}
const char *
-SignalFilter::convertDomainIDToName (const DomainID domain)
+SignalFilter::convertDomainIDToName (const int domainID)
{
- const char *name = "";
+ static const char *name = "";
- if (domain == DOMAIN_SPATIAL)
- return (DOMAIN_SPATIAL_STR);
- else if (domain == DOMAIN_FREQUENCY)
- return (DOMAIN_FREQUENCY_STR);
+ if (domainID >= 0 && domainID < s_iDomainCount)
+ return (s_aszDomainName [domainID]);
return (name);
}
+const char *
+SignalFilter::convertDomainIDToTitle (const int domainID)
+{
+ static const char *title = "";
+
+ if (domainID >= 0 && domainID < s_iDomainCount)
+ return (s_aszDomainTitle [domainID]);
+
+ return (title);
+}
+
void
SignalFilter::filterSignal (const float input[], double output[]) const
{
double
-SignalFilter::spatialResponse (FilterID filterID, double bw, double x, double param)
+SignalFilter::spatialResponse (int filterID, double bw, double x, double param)
{
if (haveAnalyticSpatial(filterID))
return spatialResponseAnalytic (filterID, bw, x, param);
}
double
-SignalFilter::spatialResponseCalc (FilterID filterID, double bw, double x, double param, int n)
+SignalFilter::spatialResponseCalc (int filterID, double bw, double x, double param, int n)
{
double zmin, zmax;
double
-SignalFilter::frequencyResponse (FilterID filterID, double bw, double u, double param)
+SignalFilter::frequencyResponse (int filterID, double bw, double u, double param)
{
double q;
double au = fabs (u);
}
const bool
-SignalFilter::haveAnalyticSpatial (FilterID filterID)
+SignalFilter::haveAnalyticSpatial (int filterID)
{
bool haveAnalytic = false;
}
double
-SignalFilter::spatialResponseAnalytic (FilterID filterID, double bw, double x, double param)
+SignalFilter::spatialResponseAnalytic (int filterID, double bw, double x, double param)
{
double q, temp;
double u = TWOPI * x;
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