/usr/include/casacore/scimath/Functionals/SimButterworthBandpass.tcc is in casacore-dev 2.2.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | //# SimButterworthBandpass.cc: Defines a Butterworth function
//# Copyright (C) 2000,2001,2002,2003
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library 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 Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef SCIMATH_SIMBUTTERWORTHBANDPASS_TCC
#define SCIMATH_SIMBUTTERWORTHBANDPASS_TCC
//# Includes
#include <casacore/scimath/Functionals/SimButterworthBandpass.h>
#include <casacore/casa/Arrays/Vector.h>
#include <casacore/casa/Exceptions/Error.h>
#include <casacore/casa/Utilities/Assert.h>
#include <casacore/casa/Containers/RecordInterface.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Constructors
template <class T>
SimButterworthBandpass<T>::SimButterworthBandpass() :
Function1D<T>(4), nl_p(0), nh_p(0) {
param_p[MINCUTOFF] = T(-1);
param_p[MAXCUTOFF] = T(1);
param_p[PEAK] = T(1);
}
template <class T>
SimButterworthBandpass<T>::SimButterworthBandpass(const uInt minord,
const uInt maxord,
const T &mincut,
const T &maxcut,
const T ¢er,
const T &peak) :
Function1D<T>(4), nl_p(minord), nh_p(maxord) {
param_p[MINCUTOFF] = mincut;
param_p[MAXCUTOFF] = maxcut;
param_p[CENTER] = center;
param_p[PEAK] = peak;
}
template <class T>
SimButterworthBandpass<T>::
SimButterworthBandpass(const RecordInterface& gr, T mincut, T maxcut,
T center, T peak) :
Function1D<T>(4), nl_p(0), nh_p(0)
{
setMode(gr);
param_p[MINCUTOFF] = mincut;
param_p[MAXCUTOFF] = maxcut;
param_p[CENTER] = center;
param_p[PEAK] = peak;
}
template <class T>
SimButterworthBandpass<T>::
SimButterworthBandpass(const SimButterworthBandpass<T> &other) :
Function1D<T>(other), nl_p(other.nl_p), nh_p(other.nh_p) {}
template <class T>
SimButterworthBandpass<T>::~SimButterworthBandpass() {}
//# Operators
template<class T>
SimButterworthBandpass<T> &
SimButterworthBandpass<T>::
operator=(const SimButterworthBandpass<T> &other) {
if (this != &other) {
Function1D<T>::operator=(other);
nl_p = other.nl_p;
nh_p = other.nh_p;
}
return *this;
}
template <class T>
T SimButterworthBandpass<T>::
eval(const typename FunctionTraits<T>::ArgType *x) const {
// this does not reflect the true responses of Butterworth filters
// calculate the low-pass portion
T hp = T(1);
if (x[0] > param_p[CENTER]) {
hp = T(1) / sqrt(T(1) + pow((x[0] - param_p[CENTER])/
(param_p[MAXCUTOFF] - param_p[CENTER]),
T(2*nh_p)));
}
// calculate the high-pass portion
if (x[0] < param_p[CENTER]) {
hp *= T(1) / sqrt(T(1) + pow((param_p[CENTER] - x[0])/
(param_p[MINCUTOFF] - param_p[CENTER]),
T(2*nl_p)));
}
return param_p[PEAK]*hp;
}
template <class T>
Bool SimButterworthBandpass<T>::hasMode() const { return True; }
template <class T>
void SimButterworthBandpass<T>::setMode(const RecordInterface& in) {
uInt order=0;
// min order
if (in.isDefined(String("minOrder"))) {
RecordFieldId fld("minOrder");
if (in.type(in.idToNumber(fld)) == TpInt) {
Int tmp;
in.get(fld, tmp);
order = static_cast<uInt>(abs(tmp));
}
else if (in.type(in.idToNumber(fld)) == TpUInt) {
in.get(fld, order);
}
setMinOrder(order);
}
// max order
if (in.isDefined(String("maxOrder"))) {
RecordFieldId fld("maxOrder");
if (in.type(in.idToNumber(fld)) == TpInt) {
Int tmp;
in.get(fld, tmp);
order = static_cast<uInt>(abs(tmp));
}
else if (in.type(in.idToNumber(fld)) == TpUInt) {
in.get(fld, order);
}
setMaxOrder(order);
}
}
template <class T>
void SimButterworthBandpass<T>::getMode(RecordInterface& out) const {
out.define(RecordFieldId("minOrder"), getMinOrder());
out.define(RecordFieldId("maxOrder"), getMaxOrder());
}
} //# NAMESPACE CASACORE - END
#endif
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