iirfiltsos_rrrf

Infinite impulse response filter primitive using second-order sections

Public Functions

iirfiltsos_rrrf	iirfiltsos_rrrf_create(float * _b, float * _a)
iirfiltsos_rrrf	iirfiltsos_rrrf_copy(iirfiltsos_rrrf _q)
int	iirfiltsos_rrrf_set_coefficients(iirfiltsos_rrrf _q, float * _b, float * _a)
int	iirfiltsos_rrrf_destroy(iirfiltsos_rrrf _q)
int	iirfiltsos_rrrf_print(iirfiltsos_rrrf _q)
int	iirfiltsos_rrrf_reset(iirfiltsos_rrrf _q)
int	iirfiltsos_rrrf_execute(iirfiltsos_rrrf _q, float _x, float * _y)
int	iirfiltsos_rrrf_execute_df1(iirfiltsos_rrrf _q, float _x, float * _y)
int	iirfiltsos_rrrf_execute_df2(iirfiltsos_rrrf _q, float _x, float * _y)
float	iirfiltsos_rrrf_groupdelay(iirfiltsos_rrrf _q, float _fc)

Interfaces

iirfiltsos_rrrf iirfiltsos_rrrf_create(float * _b, float * _a)∞

create 2nd-order infinite impulse response filter

• _b : feed-forward coefficients, shape: (_3, 1)
• _a : feed-back coefficients, shape: (_3, 1)

iirfiltsos_rrrf iirfiltsos_rrrf_copy(iirfiltsos_rrrf _q)∞

Copy object including all internal objects and state

int iirfiltsos_rrrf_set_coefficients(iirfiltsos_rrrf _q, float * _b, float * _a)∞

explicitly set 2nd-order IIR filter coefficients

• _q : iirfiltsos object
• _b : feed-forward coefficients, shape: (3, 1)
• _a : feed-back coefficients, shape: (3, 1)

int iirfiltsos_rrrf_destroy(iirfiltsos_rrrf _q)∞

destroy iirfiltsos object, freeing all internal memory

int iirfiltsos_rrrf_print(iirfiltsos_rrrf _q)∞

print iirfiltsos object properties to stdout

int iirfiltsos_rrrf_reset(iirfiltsos_rrrf _q)∞

clear/reset iirfiltsos object internals

int iirfiltsos_rrrf_execute(iirfiltsos_rrrf _q, float _x, float * _y)∞

compute filter output

• _q : iirfiltsos object
• _x : input sample
• _y : output sample pointer

int iirfiltsos_rrrf_execute_df1(iirfiltsos_rrrf _q, float _x, float * _y)∞

compute filter output, direct-form I method

• _q : iirfiltsos object
• _x : input sample
• _y : output sample pointer

int iirfiltsos_rrrf_execute_df2(iirfiltsos_rrrf _q, float _x, float * _y)∞

compute filter output, direct-form II method

• _q : iirfiltsos object
• _x : input sample
• _y : output sample pointer

float iirfiltsos_rrrf_groupdelay(iirfiltsos_rrrf _q, float _fc)∞

compute and return group delay of filter object

• _q : filter object
• _fc : frequency to evaluate