allpass           355 libavfilter/af_biquads.c     case allpass:
allpass           606 libavfilter/af_biquads.c DEFINE_BIQUAD_FILTER(allpass, "Apply a two-pole all-pass filter.");
allpass            54 libavfilter/allfilters.c     REGISTER_FILTER(ALLPASS,        allpass,        af);