Lines Matching defs:bpf
383 double bpf[9]; /* IIR bandpass filter */
758 signal = (up->bpf[8] = up->bpf[7]) * 5.844676e-01;
759 signal += (up->bpf[7] = up->bpf[6]) * 4.884860e-01;
760 signal += (up->bpf[6] = up->bpf[5]) * 2.704384e+00;
761 signal += (up->bpf[5] = up->bpf[4]) * 1.645032e+00;
762 signal += (up->bpf[4] = up->bpf[3]) * 4.644557e+00;
763 signal += (up->bpf[3] = up->bpf[2]) * 1.879165e+00;
764 signal += (up->bpf[2] = up->bpf[1]) * 3.522634e+00;
765 signal += (up->bpf[1] = up->bpf[0]) * 7.315738e-01;
766 up->bpf[0] = sample - signal;
767 signal = up->bpf[0] * 6.176213e-03
768 + up->bpf[1] * 3.156599e-03
769 + up->bpf[2] * 7.567487e-03
770 + up->bpf[3] * 4.344580e-03
771 + up->bpf[4] * 1.190128e-02
772 + up->bpf[5] * 4.344580e-03
773 + up->bpf[6] * 7.567487e-03
774 + up->bpf[7] * 3.156599e-03
775 + up->bpf[8] * 6.176213e-03;