C#调用笔记本摄像头当镜子用

前段时间看见别人写的一篇 c#调用网络摄像头的，正好搬到的新的地方，这地儿洗脸的地方木有镜子用，每天起床，头发总是很乱，也不想专门去超市买个镜子，又正好笔记本上有个摄像头，平时也木有MM跟偶视频聊天，纯粹的浪费了一个多好的功能，突发"奇想"，视频不就是实时的吗，何不写个客户端程序，把摄像头当镜子用呢，想到此处，所以把别人的代码copy过来以定制偶整理头发的镜子，不过发现copy过来的代码偶尔不工作，重新修改了下，基本当个镜子木有问题了（当然木有镜子清晰!），只是有一个问题至今还木解决，视频源窗口偶尔会弹出来，不知道哪个筒子能解决，如下图(左)，另外一张就是偶的镜子程序，刚下班回来，头发还不乱，稍加整理了下，截个了屏 #_#

 

 刚下班，所以人有点累，废话不多话，直接上代码，如下，希望对这个有兴趣的筒子也可以借鉴下，大家相互借鉴，相信总是可以做得更好 ：）

namespace webcam
{
    using System;
    using System.Runtime.InteropServices;
    using System.Windows.Forms;

    /// <summary>
    /// Leon's webcam mirror
    /// </summary>
    public partial class WebCam : Form
    {
        /// <summary>
        /// Webcam handle. 
        /// </summary>
        private int hHwnd;

        public WebCam()
        {
            InitializeComponent();
        }

        public struct videohdr_tag
        {
            public byte[] lpData;
            public int dwBufferLength;
            public int dwBytesUsed;
            public int dwTimeCaptured;
            public int dwUser;
            public int dwFlags;
            public int[] dwReserved;
        }

        #region P/Invoke

        [DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int capCreateCaptureWindowA([MarshalAs(UnmanagedType.VBByRefStr)]   ref   string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
        [DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern bool capGetDriverDescriptionA(short wDriver, [MarshalAs(UnmanagedType.VBByRefStr)]   ref   string lpszName, int cbName, [MarshalAs(UnmanagedType.VBByRefStr)]   ref   string lpszVer, int cbVer);
        [DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern bool DestroyWindow(int hndw);
        [DllImport("user32", EntryPoint = "SendMessageA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)]   object lParam);
        [DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
        [DllImport("vfw32.dll")]
        public static extern string capVideoStreamCallback(int hwnd, videohdr_tag videohdr_tag);
        [DllImport("vicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern bool capSetCallbackOnFrame(int hwnd, string s);

        #endregion

        /// <summary>
        /// Initialize webcam and display the video in a panel.
        /// </summary>
        /// <returns></returns>
        private bool InitializeWebcam()
        {
            bool ok = false;

            int intWidth = this.panel1.Width;
            int intHeight = this.panel1.Height;
            int intDevice = 0;
            string refDevice = intDevice.ToString();

            //Create vedio and get the window handle.
            hHwnd = WebCam.capCreateCaptureWindowA(ref refDevice, 1342177280, 0, 0, 640, 480, this.panel1.Handle.ToInt32(), 0);
           
            if (WebCam.SendMessage(hHwnd, 0x40a, intDevice, 0) > 0)
            {
                WebCam.SendMessage(this.hHwnd, 0x435, -1, 0);
                WebCam.SendMessage(this.hHwnd, 0x434, 0x42, 0);
                WebCam.SendMessage(this.hHwnd, 0x432, -1, 0);
                WebCam.SetWindowPos(this.hHwnd, 1, 0, 0, intWidth, intHeight, 6);

                ok = true;
            }
            else
            {
                WebCam.DestroyWindow(this.hHwnd);
            }

            return ok;
        }
        /// <summary>
        /// App run, then invoke the webcam till successfully.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void WebCam_Load(object sender, EventArgs e)
        {
            bool ok = false;

            while (!ok)
            {
                ok = this.InitializeWebcam();
                System.Threading.Thread.Sleep(100);
            }
        }
        private void CloseWebcam()
        {
            if (this.hHwnd > 0)
            {
                WebCam.SendMessage(this.hHwnd, 0x40b, 0, 0);
                WebCam.DestroyWindow(this.hHwnd);
            }
        }
        /// <summary>
        /// when close window, destroy the webcam window.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void WebCam_FormClosed(object sender, FormClosedEventArgs e)
        {
            CloseWebcam();
        }
        /// <summary>
        /// when window size changed, resize webcam pic.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void WebCam_SizeChanged(object sender, EventArgs e)
        {
            WebCam.SetWindowPos(this.hHwnd, 1, 0, 0,this.Width,this.Height, 6);
        }
    }
}

排列控件的Designer代码就不贴了，就一个panel控件，相信大家一看就懂的:) , 实现这个“镜子”的代码，所花的时间还真的比去超市的买个镜子花的时间少哈，而且还变废为宝，c#真不愧是快餐语言，够快，够方便的 :)