biquad            110 libavfilter/af_aemphasis.c             dst[c] = level_out * biquad(&s->rc[c].r1, s->rc[c].use_brickw ? biquad(&s->rc[c].brickw, src[c] * level_in) : src[c] * level_in);
biquad           1361 libavfilter/af_arnndn.c     biquad(x, st->mem_hp_x, in, b_hp, a_hp, FRAME_SIZE);
biquad            134 libavfilter/af_biquads.c     if (s->filter_type != biquad) {
biquad            304 libavfilter/af_biquads.c     case biquad:
biquad            866 libavfilter/af_biquads.c DEFINE_BIQUAD_FILTER(biquad, "Apply a biquad IIR filter with the given coefficients.");