/**
* Updates the participant with information for receiver reports.
*
* @param packetLength to keep track of received octets
* @param pkt the most recently received packet
*/
protected void updateRRStats(int packetLength, RtpPkt pkt) {
int curSeqNum = pkt.getSeqNumber();
if (firstSeqNumber < 0) {
firstSeqNumber = curSeqNum;
}
receivedOctets += packetLength;
receivedSinceLastSR++;
receivedPkts++;
long curTime = System.currentTimeMillis();
if (this.lastSeqNumber < curSeqNum) {
// In-line packet, best thing you could hope for
this.lastSeqNumber = curSeqNum;
} else if (this.lastSeqNumber - this.lastSeqNumber < -100) {
// Sequence counter rolled over
this.lastSeqNumber = curSeqNum;
seqRollOverCount++;
} else {
// This was probably a duplicate or a late arrival.
}
// Calculate jitter
if (this.lastRtpPkt > 0) {
long D = (pkt.getTimeStamp() - curTime) - (this.lastRtpTimestamp - this.lastRtpPkt);
if (D < 0) D = (-1) * D;
this.interArrivalJitter += ((double) D - this.interArrivalJitter) / 16.0;
}
lastRtpPkt = curTime;
lastRtpTimestamp = pkt.getTimeStamp();
}
