public byte[] Transform(byte[] pkt, int offset, int length)
{
// Wrap the data into raw packet for readable format
this.packet.Wrap(pkt, offset, length);
// Associate the packet with its encryption context
long ssrc = this.packet.GetRTCPSSRC();
SrtcpCryptoContext context = null;
contexts.TryGetValue(ssrc, out context);
if (context == null)
{
context = forwardEngine.GetDefaultContextControl().DeriveContext(ssrc);
context.DeriveSrtcpKeys();
contexts.AddOrUpdate(ssrc, context, (a, b) => context);
}
// Secure packet into SRTCP format
context.TransformPacket(packet);
return(packet.GetData());
}
public byte[] Transform(byte[] pkt, int offset, int length)
{
var isLocked = Interlocked.CompareExchange(ref _isLocked, 1, 0) != 0;
try
{
// Wrap the data into raw packet for readable format
var packet = !isLocked ? this.packet : new RawPacket();
packet.Wrap(pkt, offset, length);
// Associate the packet with its encryption context
long ssrc = packet.GetRTCPSSRC();
SrtcpCryptoContext context = null;
contexts.TryGetValue(ssrc, out context);
if (context == null)
{
context = forwardEngine.GetDefaultContextControl().DeriveContext(ssrc);
context.DeriveSrtcpKeys();
contexts.AddOrUpdate(ssrc, context, (a, b) => context);
}
// Secure packet into SRTCP format
context.TransformPacket(packet);
byte[] result = packet.GetData();
return(result);
}
finally
{
//Unlock
if (!isLocked)
{
Interlocked.CompareExchange(ref _isLocked, 0, 1);
}
}
}