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-rw-r--r--include/dspi/DSPIcomplex.h191
1 files changed, 0 insertions, 191 deletions
diff --git a/include/dspi/DSPIcomplex.h b/include/dspi/DSPIcomplex.h
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index ad3e041..0000000
--- a/include/dspi/DSPIcomplex.h
+++ /dev/null
@@ -1,191 +0,0 @@
-/*
- * DSPIcomplex.h - Quick and dirty inline class for complex numbers
- * (mainly to compute filter poles/zeros, not to be used inside loops)
- * Copyright (c) 2000 by Tom Schouten
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef DSPIcomplex_h
-#define DSPIcomplex_h
-
-#include <math.h>
-#include <iostream>
-
-class DSPIcomplex
-{
- public:
- inline DSPIcomplex() {_r = _i = 0;}
- inline DSPIcomplex(const float &a, const float &b) {setCart(a, b);}
- inline DSPIcomplex(const float &phasor) {setAngle(phasor);}
-
- inline void setAngle(const float &angle) {_r = cos(angle); _i = sin(angle);}
- inline void setPolar(const float &phasor, const float &norm)
- {_r = norm * cos(phasor); _i = norm * sin(phasor);}
- inline void setCart(const float &a, const float &b) {_r = a; _i = b;}
-
- inline const float& r() const {return _r;}
- inline const float& i() const {return _i;}
-
- inline float norm2() const {return _r*_r+_i*_i;}
- inline float norm() const {return sqrt(norm2());}
- inline void normalize() {float n = 1.0f / norm(); _r *= n; _i *= n;}
-
- inline DSPIcomplex conj() const {return DSPIcomplex(_r, -_i);}
-
- inline float angle() const {return atan2(_i, _r);}
-
-
- inline DSPIcomplex operator+ (const DSPIcomplex &a) const
- {
- return DSPIcomplex(_r + a.r(), _i + a.i());
- }
- inline DSPIcomplex operator+ (float f) const
- {
- return DSPIcomplex(_r + f, _i);
- }
- inline DSPIcomplex operator- (const DSPIcomplex &a) const
- {
- return DSPIcomplex(_r - a.r(), _i - a.i());
- }
- inline DSPIcomplex operator- (float f) const
- {
- return DSPIcomplex(_r - f, _i);
- }
-
- inline DSPIcomplex operator* (const DSPIcomplex &a) const
- {
- return DSPIcomplex(_r * a.r() - _i * a.i(), _i * a.r() + _r * a.i());
- }
- inline DSPIcomplex operator* (float f) const
- {
- return DSPIcomplex(_r * f, _i * f);
- }
- inline DSPIcomplex operator/ (const DSPIcomplex &a) const
- {
- float n_t = 1.0f / a.norm2();
- return DSPIcomplex(n_t * (_r * a.r() + _i * a.i()), n_t * (_i * a.r() - _r * a.i()));
- }
- inline DSPIcomplex operator/ (float f) const
- {
- float n_t = 1.0f / f;
- return DSPIcomplex(n_t * _r, n_t * _i);
- }
-
- inline friend std::ostream& operator<< (std::ostream& o, DSPIcomplex& a)
- {
- return o << "(" << a.r() << "," << a.i() << ")";
- }
-
- inline friend DSPIcomplex operator+ (float f, DSPIcomplex& a)
- {
- return(DSPIcomplex(a.r() + f, a.i()));
- }
-
- inline friend DSPIcomplex operator- (float f, DSPIcomplex& a)
- {
- return(DSPIcomplex(f - a.r(), - a.i()));
- }
-
- inline friend DSPIcomplex operator/ (float f, DSPIcomplex& a)
- {
- return(DSPIcomplex(f,0) / a);
- }
-
- // ????
- inline friend DSPIcomplex operator* (float f, DSPIcomplex& a)
- {
- return(DSPIcomplex(f*a.r(), f*a.i()));
- }
-
-
- inline DSPIcomplex& operator *= (float f)
- {
- _r *= f;
- _i *= f;
- return *this;
- }
-
- inline DSPIcomplex& operator /= (float f)
- {
- _r /= f;
- _i /= f;
- return *this;
- }
-
- inline DSPIcomplex& operator *= (DSPIcomplex& a)
- {
- float r_t = _r * a.r() - _i * a.i();
- _i = _r * a.i() + _i * a.r();
- _r = r_t;
-
- return *this;
- }
-
- inline DSPIcomplex& operator /= (DSPIcomplex& a)
- {
- float n_t = a.norm2();
- float r_t = n_t * (_r * a.r() + _i * a.i());
- _i = n_t * (_i * a.r() - _r * a.i());
- _r = r_t;
-
- return *this;
- }
-
-
- float _r;
- float _i;
-};
-
-
-// COMPLEX LOG
-
-inline DSPIcomplex dspilog(DSPIcomplex a) /* complex log */
-{
- float r_t = log(a.norm());
- float i_t = a.angle();
- return DSPIcomplex(r_t, i_t);
-}
-
-// COMPLEX EXP
-
-inline DSPIcomplex dspiexp(DSPIcomplex a) /* complex exp */
-{
- return (DSPIcomplex(a.i()) * exp(a.r()));
-}
-
-// BILINEAR TRANSFORM analog -> digital
-
-inline DSPIcomplex bilin_stoz(DSPIcomplex a)
-{
- DSPIcomplex a2 = a * 0.5f;
- return((1.0f + a2)/(1.0f - a2));
-}
-
-// BILINEAR TRANSFORM digital -> analog
-
-inline DSPIcomplex bilin_ztos(DSPIcomplex a)
-{
- return ((a - 1.0f) / (a + 1.0f))*2.0f;
-}
-
-// not really a complex function but a nice complement to the bilinear routines
-
-inline float bilin_prewarp(float freq)
-{
- return 2.0f * tan(M_PI * freq);
-}
-
-#endif //DSPIcomplex_h