public byte[] GetBytes()
{
// RTP Packet Header
// 0 - Version, P, X, CC, M, PT and Sequence Number
//32 - Timestamp.
//64 - SSRC
//96 - CSRCs (optional)
//nn - Extension ID and Length
//nn - Extension header
int padding = Padding ? 1 : 0;
int extension = Extension ? 1 : 0;
int marker = Marker ? 1 : 0;
packetBytes[0] = (byte)((Version << 6) | (padding << 5) | (extension << 4) | CSRCCount);
packetBytes[1] = (byte)(((marker & 0x01) << 7) | (PayloadType & 0x7F));
BigEndian.WriteUInt16(packetBytes, 2, Sequence);
BigEndian.WriteUInt32(packetBytes, 4, Timestamp);
BigEndian.WriteUInt32(packetBytes, 8, SSRC);
return(packetBytes);
}
private void SendPackets(Socket _socket)
{
if (!running)
{
return;
}
int bytesSend = 0;
while (packetQueue.Count > 0)
{
if (!running)
{
break;
}
RtpPacket pkt = null;
lock (locker)
{
pkt = packetQueue.Dequeue();
}
if (pkt != null)
{
try
{
// RFC 2326 10.12 Embedded (Interleaved) Binary Data
/*
* S->C: $\000{2 byte length}{"length" bytes data, w/RTP header}
* S->C: $\000{2 byte length}{"length" bytes data, w/RTP header}
* S->C: $\001{2 byte length}{"length" bytes RTCP packet}
*/
const byte magicSymbol = (byte)'$';
byte channelId = 0x42;
var data = pkt.GetBytes();
ushort dataLength = (ushort)data.Length;
int frameSize = data.Length + 4; // data + header
byte[] frameBytes = new byte[frameSize];
int offset = 0;
frameBytes[offset] = magicSymbol;
offset++;
frameBytes[offset] = channelId;
offset++;
BigEndian.WriteUInt16(frameBytes, offset, dataLength);
offset += 2;
Array.Copy(data, 0, frameBytes, offset, data.Length);
offset += data.Length;
_socket?.Send(frameBytes, 0, frameBytes.Length, SocketFlags.None);
bytesSend += frameBytes.Length;
// Statistic.RtpStats.Update(MediaTimer.GetRelativeTime(), rtp.Length);
}
catch (ObjectDisposedException) { }
}
}
}
