Enumeration members
ADD_TRACK
ADD_TRACK = "addTrack"
CANDIDATE_GATHERED
CANDIDATE_GATHERED = "iceGathered"
CANDIDATE_GATHERING
CANDIDATE_GATHERING = "iceGathering"
CANDIDATE_GATHER_COMPLETE
CANDIDATE_GATHER_COMPLETE = "iceGatherComplete"
ICE_COMPLETED
ICE_COMPLETED = "iceCompleted"
ICE_CONNECTED
ICE_CONNECTED = "iceConnected"
ICE_CONNECTION_STATE_CHANGE
ICE_CONNECTION_STATE_CHANGE = "iceConnectionStateChange"
NEGOTIATION_NEEDED
NEGOTIATION_NEEDED = "negotiationNeeded"
RECEIVE_DATA_CHANNEL
RECEIVE_DATA_CHANNEL = "receiveDataChannel"
REMOVE_TRACK
REMOVE_TRACK = "removeTrack"
SDP_CREATED
SDP_CREATED = "sdpCreated"
SIGNALING_STATE_CHANGE
SIGNALING_STATE_CHANGE = "signalingStateChange"
音视频轨道改变(有新轨道加入或轨道被移除)时触发