Get the length of the impulse response for a digital filter, calculating by coefficients of transfer function.
int ocmsp_impzlength( UINT * pn, const double * pb, UINT nb, const double * pa, UINT na )
Return OE_NOERROR if succeed, otherwise, non-zero error code is returned (OE_NULL_POINTER, OE_INVALID_SIZE or OE_BAD_PARAM)
ocmsp_impzlength_sos
ocmsp.h