WFUNC_HANN        122 libavfilter/af_firequalizer.c     { "wfunc", "set window function", OFFSET(wfunc), AV_OPT_TYPE_INT, { .i64 = WFUNC_HANN }, 0, NB_WFUNC-1, FLAGS, "wfunc" },
WFUNC_HANN        124 libavfilter/af_firequalizer.c         { "hann", "hann window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_HANN }, 0, 0, FLAGS, "wfunc" },
WFUNC_HANN        681 libavfilter/af_firequalizer.c             case WFUNC_HANN: