code: public long rtcpInterval(boolean initial) {
  		return RtcpIntervalCalculator.calculateInterval(initial, weSent,
  				senders, members, rtcpAvgSize, rtcpBw, RTCP_BW_FRACTION,
  				RTCP_SENDER_BW_FRACTION, RTCP_RECEIVER_BW_FRACTION);
  	}
docs: Calculates a random interval to transmit the next RTCP report, according
  to <a
  href="http://tools.ietf.org/html/rfc3550#section-6.3.1">RFC3550</a>.
  
  @param initial
  Whether an RTCP packet was already sent or not. Usually the
  minimum interval for the first packet is lower than the rest.
  
  @return the new transmission interval, in milliseconds