ff_is_multicast_address  247 libavformat/network.h int ff_is_multicast_address(struct sockaddr *addr);
ff_is_multicast_address  110 libavformat/sdp.c     is_multicast = ff_is_multicast_address(ai->ai_addr);
ff_is_multicast_address  420 libavformat/udp.c     s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);