INPUT_ON          212 libavfilter/af_amix.c         if (s->input_state[i] == INPUT_ON)
INPUT_ON          249 libavfilter/af_amix.c     memset(s->input_state, INPUT_ON, s->nb_inputs);
INPUT_ON          290 libavfilter/af_amix.c         if (s->input_state[i] == INPUT_ON) {