[Freeswitch-users] Early Media indication from B in CHANNEL_STATE event

Hi, Is there a way to get an early media indication from a B-leg in the CHANNEL_STATE event. According to http://wiki.freeswitch.org/wiki/Event_list#CHANNEL_STATE there doesn't seem to be a variable which indicates early media from B. We need to use this information to figure out whether to join B to A or generate early media and join on answer. If there is no way to get this info can we query it using Event Socket?