BIQUAD_FILTER     229 libavfilter/af_biquads.c BIQUAD_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
BIQUAD_FILTER     230 libavfilter/af_biquads.c BIQUAD_FILTER(flt, float,   -1., 1., 0)
BIQUAD_FILTER     231 libavfilter/af_biquads.c BIQUAD_FILTER(dbl, double,  -1., 1., 0)