biquad.h File Reference

Second order recursive filter and more. More...

#include <iosfwd>
#include <cmath>
#include <complex>
#include <vector>
#include <cassert>
#include "apf/denormalprevention.h"
#include "apf/math.h"

Go to the source code of this file.

Classes
struct	apf::SosCoefficients< T >
	Coefficients of digital recursive filter (second order section). More...
struct	apf::LaplaceCoefficients< T >
	Coefficients of analog recursive filter. More...
class	apf::BiQuad< T, DenormalPrevention >
	Direct Form II recursive filter of second order. More...
class	apf::Cascade< S, Container >
	Cascade of filter sections. More...

Namespaces
namespace	apf
	Audio Processing Framework.

Functions
template<typename T >
void	apf::internal::roots2poly (T Roots[2][2], T &poly1, T &poly2)
	Roots-to-polynomial conversion. More...
template<typename T >
SosCoefficients< T >	apf::bilinear (LaplaceCoefficients< T > coeffs_in, int fs, int fp)
	Bilinear transform. More...

Detailed Description

Second order recursive filter and more.

Definition in file biquad.h.

Function Documentation

roots2poly()

template<typename T >

void apf::internal::roots2poly	(	T	Roots[2][2],
		T &	poly1,
		T &	poly2
	)

Roots-to-polynomial conversion.

Template Parameters

T	precision of data

Parameters

Roots	2x2 roots matrix
poly1	reference to first-order-coefficient of output polynomial
poly2	reference to second-order-coefficient of output polynomial

Note

zeroth-order is ignored for this special case!

Definition at line 254 of file biquad.h.

References apf::internal::roots2poly().

Referenced by apf::internal::roots2poly().