public static IEnumerable <RtcpPacket> Parse(ArraySegment <byte> byteSegment)
{
Debug.Assert(byteSegment.Array != null, "byteSegment.Array != null");
int offset = byteSegment.Offset;
int totalLength = byteSegment.Count;
while (totalLength > 0)
{
int value = byteSegment.Array[offset++];
int version = value >> 6;
int padding = (value >> 5) & 1;
int sourceCount = value & 0x1F;
int payloadType = byteSegment.Array[offset++];
int dwordLength = BigEndianConverter.ReadUInt16(byteSegment.Array, offset);
offset += 2;
int payloadLength = dwordLength * 4;
if (payloadLength > totalLength - 4)
{
throw new ArgumentException(
"Invalid RTCP packet size. It seems that data segment contains bad data", nameof(byteSegment));
}
RtcpPacket packet;
if (payloadType == 200)
{
packet = new RtcpSenderReportPacket();
}
else if (payloadType == 203)
{
packet = new RtcpByePacket();
}
else
{
offset += payloadLength;
totalLength -= 4 + payloadLength;
continue;
}
packet.ProtocolVersion = version;
packet.PaddingFlag = padding != 0;
packet.SourceCount = sourceCount;
packet.PayloadType = payloadType;
packet.DwordLength = dwordLength;
packet.Length = (dwordLength + 1) * 4;
var segment = new ArraySegment <byte>(byteSegment.Array, offset, payloadLength);
packet.FillFromByteSegment(segment);
yield return(packet);
offset += payloadLength;
totalLength -= 4 + payloadLength;
}
}
public IEnumerable <RtcpPacket> GetReportByePackets()
{
RtcpReceiverReportPacket receiverReport = CreateReceiverReport();
yield return(receiverReport);
RtcpByePacket byeReport = new RtcpByePacket(_senderSyncSourceId);
yield return(byeReport);
}
