WFUNC_BLACKMAN 89 libavfilter/avf_showspectrum.c { "blackman", "Blackman window", 0, AV_OPT_TYPE_CONST, {.i64 = WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" }, WFUNC_BLACKMAN 229 libavfilter/avf_showspectrum.c case WFUNC_BLACKMAN: {