39 -(void)onMediaChannelStateChange:(JCMediaChannelState)state oldState:(JCMediaChannelState)oldState;
87 -(void)onQuery:(int)operationId result:(bool)result reason:(JCMediaChannelReason)reason queryInfo:(JCMediaChannelQueryInfo*)queryInfo;
109 -(void)onParticipantUpdate:(JCMediaChannelParticipant*)participant participantChangeParam:(JCMediaChannelParticipantChangeParam *)participantChangeParam;