/// <summary>
/// Creates a new RTCP compound packet from a serialised buffer.
/// </summary>
/// <param name="packet">The serialised RTCP compound packet to parse.</param>
public RTCPCompoundPacket(byte[] packet)
{
int offset = 0;
while (offset < packet.Length)
{
if (packet.Length - offset < RTCPHeader.HEADER_BYTES_LENGTH)
{
// Not enough bytes left for a RTCP header.
break;
}
else
{
var buffer = packet.Skip(offset).ToArray();
// The payload type field is the second byte in the RTCP header.
byte packetTypeID = buffer[1];
switch (packetTypeID)
{
case (byte)RTCPReportTypesEnum.SR:
SenderReport = new RTCPSenderReport(buffer);
int srLength = (SenderReport != null) ? SenderReport.GetBytes().Length : Int32.MaxValue;
offset += srLength;
break;
case (byte)RTCPReportTypesEnum.RR:
ReceiverReport = new RTCPReceiverReport(buffer);
int rrLength = (ReceiverReport != null) ? ReceiverReport.GetBytes().Length : Int32.MaxValue;
offset += rrLength;
break;
case (byte)RTCPReportTypesEnum.SDES:
SDesReport = new RTCPSDesReport(buffer);
int sdesLength = (SDesReport != null) ? SDesReport.GetBytes().Length : Int32.MaxValue;
offset += sdesLength;
break;
case (byte)RTCPReportTypesEnum.BYE:
Bye = new RTCPBye(buffer);
int byeLength = (Bye != null) ? Bye.GetBytes().Length : Int32.MaxValue;
offset += byeLength;
break;
case (byte)RTCPReportTypesEnum.RTPFB:
// TODO: Interpret Generic RTP feedback reports.
var rtpfbHeader = new RTCPHeader(buffer);
offset += rtpfbHeader.Length * 4 + 4;
break;
case (byte)RTCPReportTypesEnum.PSFB:
// TODO: Interpret Payload specific feedback reports.
var psfbHeader = new RTCPHeader(buffer);
offset += psfbHeader.Length * 4 + 4;
break;
default:
logger.LogWarning($"RTCPCompoundPacket did not recognise packet type ID {packetTypeID}.");
offset = Int32.MaxValue;
logger.LogWarning(packet.HexStr());
break;
}
}
}
}
public RTCPCompoundPacket(RTCPReceiverReport receiverReport, RTCPSDesReport sdesReport)
{
ReceiverReport = receiverReport;
SDesReport = sdesReport;
}