44 #define DEFAULT_STATE DirectFormII
72 inline double filter(
const double in,
75 const double out = s.m_b0*in + s.m_b1*m_x1 + s.m_b2*m_x2
76 - s.m_a1*m_y1 - s.m_a2*m_y2;
117 inline double filter(
const double in,
120 const double w = in - s.m_a1*m_v1 - s.m_a2*m_v2;
121 const double out = s.m_b0*w + s.m_b1*m_v1 + s.m_b2*m_v2;
153 inline double filter(
const double in,
156 const double out = m_s1_1 + s.m_b0*in;
157 m_s1 = m_s2_1 + s.m_b1*in - s.m_a1*out;
158 m_s2 = s.m_b2*in - s.m_a2*out;