using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.IO;
using System.Collections.Generic;
using System.Diagnostics;

public class UDPListener{
	private const int listenPort = 5000;
	
	public static int Main(){
        Console.Write("Smartcam IP [XXX.XXX.XXX.XXX] : ");
        string ip = Console.ReadLine();
        Console.Write("/dev/video[0] or /dev/video[1]: ");
        string source = Console.ReadLine();

		bool done = false;
		UdpClient listener = new UdpClient(listenPort);
		IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, listenPort);
		byte[] receive_byte_array;
        Queue<byte> _buffer = new Queue<byte>();
        byte[] message = new byte[2];
        
        TcpClient _tc = new TcpClient(ip, 9361);
        NetworkStream _ns = _tc.GetStream();

        Process.Start(String.Format("gst-launch-0.10 v4l2camsrc device=/dev/video{0} driver-name=omap3cam ! ffmpegcolorspace ! video/x-raw-yuv,width=320,height=240 ! jpegenc ! udpsink host=127.0.0.1 port=5000", source));

		try{
			while(!done){
				receive_byte_array = listener.Receive(ref groupEP);
                if (receive_byte_array.Length != 0){
                    byte[] _fileData = receive_byte_array;
                    byte[] _tmpSize = new byte[4];
                    _tmpSize = BitConverter.GetBytes(_fileData.Length);

                    _buffer.Enqueue(1);
                    _buffer.Enqueue(_tmpSize[2]);
                    _buffer.Enqueue(_tmpSize[1]);
                    _buffer.Enqueue(_tmpSize[0]);

                    foreach(byte _b in _fileData){
                        _buffer.Enqueue(_b);
                    }

                    byte[] _packet = _buffer.ToArray();
                    _ns.Write(_packet, 0, _packet.Length);

                    _buffer = new Queue<byte>();
                }
			}
		}catch(Exception e){
			Console.WriteLine(e.ToString());
		}
		
		listener.Close();
		return 0;
	}
}

gst-launch v4l2camsrc device=/dev/video1 num-buffers=1 ! fakesink