public void ReceiveCallback(IAsyncResult ar)
{
UdpClient u = (UdpClient)((UdpState)(ar.AsyncState)).u;
IPEndPoint e = (IPEndPoint)((UdpState)(ar.AsyncState)).e;
if (open)
{
bytes = u.EndReceive(ar, ref e);
if (bytes[0] == 0xFF && bytes[1] == 0xFF)
{
output.Invoke((MethodInvoker)delegate
{
output.Text = Encoding.GetEncoding(437).GetString(bytes, 2, bytes.Length - 2);
});
}
else
{
int y = ((bytes[1] << 8) | bytes[0]) / 2;
interlace = (byte)(bytes[0] & 0x1);
for (int x = 0; x < bytes.Length - 2; x++)
{
if (y < frameHeight && x < frameWidth)
{
imageData[x + (y * frameWidth)] = (ushort)(((ushort)bytes[x * 2 + 3] << 8) | bytes[x * 2 + 2]);
}
}
if (y == frameHeight / 2 - 1)
{
updateImage();
}
}
}
if (open) {
UdpState s = new UdpState();
s.e = e;
s.u = u;
u.BeginReceive(new AsyncCallback(ReceiveCallback), s);
}
}
private void button2_Click(object sender, EventArgs e)
{
if (!open)
{
frameWidth = int.Parse(widthTextBox.Text);
frameHeight = int.Parse(heightTextBox.Text);
pictureBox1.Width = frameWidth;
pictureBox1.Height = frameHeight;
button2.Text = "Stop Listening";
udpClient = new UdpClient(0xF00D);
udpClient.Client.ReceiveBufferSize = frameWidth * frameHeight * 10;
open = true;
b = new Bitmap(frameWidth, frameHeight, PixelFormat.Format16bppRgb565);
imageData = new ushort[frameWidth * frameHeight / 2];
UdpState s = new UdpState();
s.e = RemoteIpEndPoint;
s.u = udpClient;
udpClient.BeginReceive(new AsyncCallback(ReceiveCallback), s);
}
else
{
open = false;
button2.Text = "Start Listening";
udpClient.Close();
}
}