MOD               180 libavfilter/af_aecho.c #define MOD(a, b) (((a) >= (b)) ? (a) - (b) : (a))
MOD               116 libavfilter/af_aphaser.c #define MOD(a, b) (((a) >= (b)) ? (a) - (b) : (a))
MOD               215 libavfilter/af_compand.c #define MOD(a, b) (((a) >= (b)) ? (a) - (b) : (a))