public static RtpPacket Decode(byte[] buffer)
{
var packet = new RtpPacket();
packet.Version = buffer[0] >> 6;
packet.Padding = (buffer[0] & 0x20) != 0;
packet.Extension = (buffer[0] & 0x10) != 0;
packet.ContributingSourceCount = buffer[0] & 0x0f;
packet.Marker = (buffer[1] & 0x80) != 0;
packet.PayloadType = buffer[1] & 0x7f;
packet.SequenceNumber = Utils.Convert2BytesToInt(buffer, 2);
packet.TimeStamp = Utils.Convert4BytesToLong(buffer, 4);
packet.SynchronizationSource = Utils.Convert4BytesToLong(buffer, 8);
int index = 12;
if (packet.ContributingSourceCount != 0)
{
packet.ContributingSources = new Collection<string>();
while (packet.ContributingSources.Count < packet.ContributingSourceCount)
{
packet.ContributingSources.Add(Utils.ConvertBytesToString(buffer, index, 4));
index += 4;
}
}
var dataoffset = 0;
if (!packet.Extension)
dataoffset = index;
else
{
packet.ExtensionHeaderId = Utils.Convert2BytesToInt(buffer, index);
packet.ExtensionHeaderLength = Utils.Convert2BytesToInt(buffer, index + 2);
dataoffset = index + packet.ExtensionHeaderLength + 4;
}
var dataLength = buffer.Length - dataoffset;
if (dataLength > dataoffset)
{
packet.HasPayload = true;
packet.Payload = new byte[dataLength];
Array.Copy(buffer, dataoffset, packet.Payload, 0, dataLength);
}
else
{
packet.HasPayload = false;
}
return packet;
}
public RtpPacketReceivedArgs(RtpPacket packet)
{
Packet = packet;
}