integrator 131 libavfilter/f_ebur128.c struct integrator i400; ///< 400ms integrator, used for Momentary loudness (M), and Integrated loudness (I) integrator 132 libavfilter/f_ebur128.c struct integrator i3000; ///< 3s integrator, used for Short term loudness (S), and Loudness Range (LRA) integrator 517 libavfilter/f_ebur128.c static int gate_update(struct integrator *integ, double power,