public void Track(RtpPacket rtpPacket)
{
var receiverReport =
_receiverReports.GetOrAdd(rtpPacket.SynchronizationSource, k => new RtcpReceiverReportPacket
{
SynchronizationSource = (uint)_random.Next()
});
var receptionReport = new RtcpReceptionReport();
receptionReport.SynchronizationSource = rtpPacket.SynchronizationSource;
// todo: correct rtcp reception report
if (_senderReports.TryGetValue(rtpPacket.SynchronizationSource, out var senderReport))
{
receptionReport.ExtendedHighestSequenceNumberReceived = 0;
receptionReport.LastSRTimestamp = (uint)(senderReport.NtpTimestamp >> 16);
receptionReport.DelaySinceLastSR = 0;
}
receptionReport.FractionLost = 0;
receptionReport.CumulativeNumberOfPacketsLost = 0;
receptionReport.ExtendedHighestSequenceNumberReceived = 0;
receptionReport.InterarrivalJitter = 0;
receiverReport.ReceptionReports = new List <RtcpReceptionReport>(1)
{
receptionReport
};
}
private static RtcpReceptionReport ParseRtcpReceptionReport(Span <byte> bytes, ref int idx)
{
var receptionReport = new RtcpReceptionReport();
receptionReport.SynchronizationSource = BinaryPrimitives.ReadUInt32BigEndian(bytes.Slice(idx));
idx += 4;
receptionReport.FractionLost = bytes[idx];
idx += 1;
receptionReport.CumulativeNumberOfPacketsLost = (uint)(bytes[idx] << 16 | bytes[idx + 1] << 8 | bytes[idx + 2]);
idx += 3;
receptionReport.ExtendedHighestSequenceNumberReceived = BinaryPrimitives.ReadUInt32BigEndian(bytes.Slice(idx));
idx += 4;
receptionReport.InterarrivalJitter = BinaryPrimitives.ReadInt32BigEndian(bytes.Slice(idx));
idx += 4;
receptionReport.LastSRTimestamp = BinaryPrimitives.ReadUInt32BigEndian(bytes.Slice(idx));
idx += 4;
receptionReport.DelaySinceLastSR = BinaryPrimitives.ReadUInt32BigEndian(bytes.Slice(idx));
idx += 4;
return(receptionReport);
}