RRATIO            302 libavfilter/af_afftdn.c     d3 = RATIO * prior[0] + RRATIO * fmax(d2 - 1.0, 0.0);
RRATIO            317 libavfilter/af_afftdn.c         d3 = RATIO * prior[i] + RRATIO * fmax(d2 - 1.0, 0.0);
RRATIO            331 libavfilter/af_afftdn.c     d3 = RATIO * prior[s->fft_length2] + RRATIO * fmax(d2 - 1.0, 0.0);
RRATIO            803 libavfilter/af_afftdn.c             prior[i] = RRATIO;