void ReadThread()
{
List <byte> buffer = new List <byte>();
while (_readThread != null)
{
while (_innerPort.BytesToRead > 0)
{
byte newByte = (byte)_innerPort.ReadByte();
if (newByte == 0xFF)
{
bool matchesCurrent;
//end byte. queue up message
var response = ViscaResponse.ProcessResponse(buffer.ToArray(), CurrentCommand, out matchesCurrent);
if (matchesCurrent)
{
CurrentCommand = null;
}
lock (_responseQueue) _responseQueue.Enqueue(response);
buffer.Clear();
}
else
{
buffer.Add(newByte);
}
}
Thread.Sleep(10);
}
}
public void SendCommand(ViscaCommand cmd)
{
if (CommandInProcess)
{
throw new InvalidOperationException();
}
CurrentCommand = cmd;
var msgs = cmd.GetCommandMsgs();
foreach (OutMessage msg in msgs)
{
_innerPort.Write(msg.Data, 0, msg.Data.Length);
while (CurrentCommand != null)
{
Thread.Sleep(10);
}
}
}
internal static ViscaResponse ProcessResponse(byte[] packet, ViscaCommand pendingCmd, out bool matchesPending)
{
byte src = (byte)(packet[0] >> 4);
byte socket = (byte)(packet[1] & 0x0F);
byte replyType = (byte)(packet[1] >> 4);
matchesPending = false;
if (packet.Last() != 0xFF)
{
throw new ArgumentException("Invalid Data: Does not end with expected 0xFF");
}
ViscaResponse response = null;
switch (replyType)
{
case 4: //Ack
if (pendingCmd == null)
{
throw new InvalidOperationException();
}
response = new Acknowledgement();
matchesPending = true;
break;
case 5: //Completion (commands/inquiries)
if (packet.Length == 3) //Command Complete
{
response = new CommandComplete();
}
else
{
matchesPending = true;
response = (ViscaInquiryResponse)Activator.CreateInstance(pendingCmd.InquiryResponseType);
}
break;
case 6: //Error
if (packet.Length != 4)
{
throw new ArgumentException("Invalid Data: Error Packet not correct.");
}
response = new CommandError(packet[2]);
if (pendingCmd != null)
{
matchesPending = true;
}
break;
default: throw new NotSupportedException();
}
response.SourceAddress = src;
response.Socket = socket;
if (response is ViscaInquiryResponse)
{
//process only the meat data of the packet (strip out header and footer bytes)
byte[] data = new byte[packet.Length - 3];
Array.Copy(packet, 2, data, 0, packet.Length - 3);
((ViscaInquiryResponse)response).ProcessResponse_Internal(data);
}
return(response);
}
