biquad            123 libavfilter/af_biquads.c     if (s->filter_type != biquad) {
biquad            270 libavfilter/af_biquads.c     case biquad:
biquad            619 libavfilter/af_biquads.c DEFINE_BIQUAD_FILTER(biquad, "Apply a biquad IIR filter with the given coefficients.");
biquad             79 libavfilter/allfilters.c     REGISTER_FILTER(BIQUAD,         biquad,         af);