gain_scale        644 libavcodec/g723_1dec.c         gain_scale(p, dst, energy);
gain_scale        127 libavfilter/af_afftdn.c     double  gain_scale;
gain_scale        545 libavfilter/af_afftdn.c         dnch->min_abs_var[i] = s->gain_scale * dnch->abs_var[i];
gain_scale        601 libavfilter/af_afftdn.c     s->gain_scale = 1.0 / (s->max_gain * s->max_gain);