BIQUAD_FILTER     178 libavfilter/af_biquads.c #define BIQUAD_FILTER(name, type, min, max, need_clipping)                    \
BIQUAD_FILTER     256 libavfilter/af_biquads.c BIQUAD_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)