public void addSR()
{
enqueueCommonReportPrefix(RTCPConstants.RTCP_PT_SR, _stream.SSRC(),
5 /* extra words in a SR */);
// Now, add the 'sender info' for our sink
// Insert the NTP and RTP timestamps for the 'wallclock time':
TimeVal timeNow = new TimeVal();
RTPTime.GetTimestamp(ref timeNow);
_fOutBuf.WriteWord((uint)(timeNow.tv_sec + 0x83AA7E80));
// NTP timestamp most-significant word (1970 epoch -> 1900 epoch)
double fractionalPart = (timeNow.tv_usec / 15625.0) * 0x04000000; // 2^32/10^6
_fOutBuf.WriteWord((uint)(fractionalPart + 0.5));
// NTP timestamp least-significant word
uint rtpTimestamp = _stream.ConvertToRTPTimestamp(timeNow);
_fOutBuf.WriteWord(rtpTimestamp); // RTP ts
// Insert the packet and byte counts:
uint packetCount = _stream.PacketCount() - _session.PacketsCount;
uint octetCount = _stream.OctetCount() - _session.OctetCount;
_fOutBuf.WriteWord(packetCount);
_fOutBuf.WriteWord(octetCount);
if (_logger.IsDebugEnabled)
{
_logger.Debug("Sending report : {0}.{1} packet {2} octet {3} Sequence {4}", timeNow.tv_sec + 0x83AA7E80,
(uint)(fractionalPart + 0.5), packetCount, octetCount, _stream.CurrentSeqNo());
}
}
public RTPTransmissionStat(RTPStream stream, uint ssrc)
{
_stream = stream;
SSRC = ssrc;
fLastPacketNumReceived = 0;
fPacketLossRatio = 0;
fTotNumPacketsLost = 0;
fJitter = 0;
fLastSRTime = 0;
fDiffSR_RRTime = 0;
fAtLeastTwoRRsHaveBeenReceived = false;
fFirstPacket = true;
fTotalOctetCount_hi = 0;
fTotalOctetCount_lo = 0;
fTotalPacketCount_hi = 0;
fTotalPacketCount_lo = 0;
fTimeCreated = new TimeVal();
RTPTime.GetTimestamp(ref fTimeCreated);
fLastOctetCount = _stream.OctetCount();
fLastPacketCount = _stream.PacketCount();
}
public void noteIncomingRR(IPEndPoint lastFromAddress, uint lossStats, uint lastPacketNumReceived, uint jitter, uint lastSRTime, uint diffSR_RRTime)
{
if (fFirstPacket)
{
fFirstPacket = false;
fFirstPacketNumReported = lastPacketNumReceived;
}
else
{
fAtLeastTwoRRsHaveBeenReceived = true;
fOldLastPacketNumReceived = fLastPacketNumReceived;
fOldTotNumPacketsLost = fTotNumPacketsLost;
}
RTPTime.GetTimestamp(ref fTimeReceived);
fLastFromAddress = lastFromAddress;
fPacketLossRatio = (byte)(lossStats >> 24);
fTotNumPacketsLost = lossStats & 0xFFFFFF;
fLastPacketNumReceived = lastPacketNumReceived;
fJitter = jitter;
fLastSRTime = lastSRTime;
fDiffSR_RRTime = diffSR_RRTime;
if (_logger.IsDebugEnabled)
{
_logger.Debug("RTCP RR data (received at {0}.{1}): lossStats {2:x8}, TotNumLost {3} lastPacketNumReceived {4}, jitter {5}, lastSRTime {6}, diffSR_RRTime {7} from SSRC {0}",
fTimeReceived.tv_sec, fTimeReceived.tv_usec, lossStats, fTotNumPacketsLost, lastPacketNumReceived, jitter, lastSRTime, diffSR_RRTime, SSRC);
}
if (_logger.IsDebugEnabled)
{
uint rtd = roundTripDelay();
_logger.Debug("=> round-trip delay: {0:x4} (== {1} seconds)", rtd, rtd / 65536.0);
}
// Update our counts of the total number of octets and packets sent towards
// this receiver:
uint newOctetCount = _stream.OctetCount();
uint octetCountDiff = newOctetCount - fLastOctetCount;
fLastOctetCount = newOctetCount;
uint prevTotalOctetCount_lo = fTotalOctetCount_lo;
fTotalOctetCount_lo += octetCountDiff;
if (fTotalOctetCount_lo < prevTotalOctetCount_lo)
{ // wrap around
++fTotalOctetCount_hi;
}
uint newPacketCount = _stream.PacketCount();
uint packetCountDiff = newPacketCount - fLastPacketCount;
fLastPacketCount = newPacketCount;
uint prevTotalPacketCount_lo = fTotalPacketCount_lo;
fTotalPacketCount_lo += packetCountDiff;
if (fTotalPacketCount_lo < prevTotalPacketCount_lo)
{ // wrap around
++fTotalPacketCount_hi;
}
}