Windows Phone通过UDP提供的摄像头信息“非常糟糕”.缓慢

我一直在做一个私人项目，我想学习如何在windows手机上编程，在某一点上，我开始摆弄插座和相机，一个伟大的想法出现在我的脑海中视频输入(愚蠢的我甚至尝试)。

但现在我在这里，我有一些东西好吧，它工作起来像一个魅力，但Lumia 800不能快速通过for循环。它每7-8秒发送一帧我觉得很奇怪，因为它应该足够强大。感觉和看起来就像在56k调制解调器上看色情片，没有色情片。

我还意识到一帧是317000像素，每帧大约1MB，我还发送xy坐标，所以我的每帧占用2.3MB，我仍然在用不同的方法来解决这个问题，以保持它的低。所以我猜我需要做圆顶魔法，使位置和像素值都是一个可接受的大小。因为如果我以一个可接受的速度启动它，至少需要60MB/s才能达到30fps，但这是另一天的问题。

//How many pixels to send per burst (1000 seems to be the best)
    const int PixelPerSend = 1000;
    int bSize = 7 * PixelPerSend;
    //Comunication thread UDP feed   
    private void EthernetComUDP() //Runs in own thread
    {
        //Connect to Server
        clientUDP = new SocketClientUDP();
        int[] ImageContent = new int[(int)cam.PreviewResolution.Height *   (int)cam.PreviewResolution.Width];
        byte[] PacketContent = new byte[bSize];
        string Pixel,l;
        while (SendingData)
        {
            cam.GetPreviewBufferArgb32(ImageContent);
            int x = 1, y = 1, SenderCount = 0;
            //In dire need of a speedup
            for (int a = 0; a < ImageContent.Length; a++) //this loop
            {
                Pixel = Convert.ToString(ImageContent[a], 2).PadLeft(32, '0');
                //A - removed to conserve bandwidth
                //PacketContent[SenderCount] = Convert.ToByte(Pixel.Substring(0, 8), 2);//0
                //R
                PacketContent[SenderCount] = Convert.ToByte(Pixel.Substring(8, 8), 2);//8
                //G
                PacketContent[SenderCount + 1] = Convert.ToByte(Pixel.Substring(16, 8), 2);//16
                //B
                PacketContent[SenderCount + 2] = Convert.ToByte(Pixel.Substring(24, 8), 2);//24
                //Coordinates
                //X
                l = Convert.ToString(x, 2).PadLeft(16, '0');
                //X bit(1-8)
                PacketContent[SenderCount + 3] = Convert.ToByte(l.Substring(0, 8), 2);
                //X bit(9-16)
                PacketContent[SenderCount + 4] = Convert.ToByte(l.Substring(8, 8), 2);
                //Y
                l = Convert.ToString(y, 2).PadLeft(16, '0');
                //Y bit(1-8)
                PacketContent[SenderCount + 5] = Convert.ToByte(l.Substring(0, 8), 2);
                //Y bit(9-16)
                PacketContent[SenderCount + 6] = Convert.ToByte(l.Substring(8, 8), 2);
                x++;
                if (x == cam.PreviewResolution.Width)
                {
                    y++;
                    x = 1;
                }
                SenderCount += 7;
                if (SenderCount == bSize)
                {
                    clientUDP.Send(ConnectToIP, PORT + 1, PacketContent);
                    SenderCount = 0;
                }
            }
        }
        //Close on finish
        clientUDP.Close();
    }

为了简单起见，我尝试使用

BitConverter.GetBytes(ImageContent[a]);

而不是我创建的字符串解析混乱(要修复只是想要一个概念证明)，但要做简单的BitConverter并没有加快它的速度。

所以现在我对我的最后一个想法，UDP发送方套接字开关是大致相同的一个在msdn的库。

    public string Send(string serverName, int portNumber, byte[] payload)
    {
        string response = "Operation Timeout";
        // We are re-using the _socket object that was initialized in the Connect method
        if (_socket != null)
        {
            // Create SocketAsyncEventArgs context object
            SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
            // Set properties on context object
            socketEventArg.RemoteEndPoint = new DnsEndPoint(serverName, portNumber);
            // Inline event handler for the Completed event.
            // Note: This event handler was implemented inline in order to make this method self-contained.
            socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e)
            {
                response = e.SocketError.ToString();
                // Unblock the UI thread
                _clientDone.Set();
            });
            socketEventArg.SetBuffer(payload, 0, payload.Length);
            // Sets the state of the event to nonsignaled, causing threads to block
            _clientDone.Reset();
            // Make an asynchronous Send request over the socket
            _socket.SendToAsync(socketEventArg);
            // Block the UI thread for a maximum of TIMEOUT_MILLISECONDS milliseconds.
            // If no response comes back within this time then proceed
            _clientDone.WaitOne(TIMEOUT_MILLISECONDS);
        }
        else
        {
            response = "Socket is not initialized";
        }
        return response;
    }

总而言之，我最终得到了3个解决方案

1. 接受失败(但这不会发生，所以让我们看看2)

2. 减少发送的数据量(破坏质量640x480是足够小的我认为)

3. 找到明显的问题(谷歌和朋友的好主意，这就是为什么我在这里)