using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

 /// <summary>

    /// 摄像头操作辅助类，包括开启、关闭、抓图、设置等功能

    /// </summary>

    public class Camera

    {

        private IntPtr m_LwndC;

        private IntPtr m_ControlPtr;

        private int m_Width;

        private int m_Height;

​

        /// <summary>

        /// 构造函数

        /// </summary>

        /// <param name="handle"></param>

        /// <param name="width"></param>

        /// <param name="height"></param>

        public Camera(IntPtr handle, int width, int height)

        {

            m_ControlPtr = handle;

            m_Width = width;

            m_Height = height;

        }

​

        /// <summary>

        /// 帧回调的委托

        /// </summary>

        /// <param name="data">数据</param>

        public delegate void RecievedFrameEventHandler(byte[] data);

        /// <summary>

        /// 帧回调事件处理

        /// </summary>

        public event RecievedFrameEventHandler RecievedFrame;

        private AviCapture.FrameEventHandler mFrameEventHandler;

​

        /// <summary>

        /// 关闭摄像头

        /// </summary>

        public void CloseWebcam()

        {

            this.capDriverDisconnect(this.m_LwndC);

        }

​

        /// <summary>

        /// 开启摄像头

        /// </summary>

        public void StartWebCam()

        {

            byte[] lpszName = new byte[100];

            byte[] lpszVer = new byte[100];

​

            AviCapture.capGetDriverDescriptionA(1, lpszName, 100, lpszVer, 100);

            this.m_LwndC = AviCapture.capCreateCaptureWindowA(lpszName, AviCapture.WS_VISIBLE + AviCapture.WS_CHILD, 0, 0, m_Width, m_Height, m_ControlPtr, 0);

​

            if (this.capDriverConnect(this.m_LwndC, 0)) {

                this.capPreviewRate(this.m_LwndC, 66);

​

                this.capPreview(this.m_LwndC, true);

                this.capOverlay(this.m_LwndC, true);

                AviCapture.BITMAPINFO bitmapinfo = new AviCapture.BITMAPINFO();

                bitmapinfo.bmiHeader.biSize = AviCapture.SizeOf(bitmapinfo.bmiHeader);

                bitmapinfo.bmiHeader.biWidth = this.m_Width;

                bitmapinfo.bmiHeader.biHeight = this.m_Height;

                bitmapinfo.bmiHeader.biPlanes = 1;

                bitmapinfo.bmiHeader.biBitCount = 24;

                this.capSetVideoFormat(this.m_LwndC, ref bitmapinfo, AviCapture.SizeOf(bitmapinfo));

​

                this.mFrameEventHandler = new AviCapture.FrameEventHandler(FrameCallBack);

                this.capSetCallbackOnFrame(this.m_LwndC, this.mFrameEventHandler);

                AviCapture.SetWindowPos(this.m_LwndC, 0, 0, 0, m_Width, m_Height, 6);

            }

        }

​

        /// <summary>

        /// 抓图到文件

        /// </summary>

        /// <param name="path"></param>

        public void GrabImage(string path)

        {

            IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);

            AviCapture.SendMessage(m_LwndC, AviCapture.WM_CAP_SAVEDIB, 0, hBmp.ToInt32());

        }

​

        /// <summary>

        /// 抓图到剪切板

        /// </summary>

        /// <returns></returns>

        public bool GrabImageToClipBoard()

        {

            return AviCapture.SendMessage(m_LwndC, AviCapture.WM_CAP_EDIT_COPY, 0, 0);

        }

​

        /// <summary>

        /// 弹出色彩设置对话框

        /// </summary>

        public void SetCaptureSource()

        {

            AviCapture.CAPDRIVERCAPS caps = new AviCapture.CAPDRIVERCAPS();

            AviCapture.SendMessage(m_LwndC, AviCapture.WM_CAP_GET_CAPS, AviCapture.SizeOf(caps), ref caps);

            if (caps.fHasDlgVideoSource) {

                AviCapture.SendMessage(m_LwndC, AviCapture.WM_CAP_DLG_VIDEOSOURCE, 0, 0);

            }

        }

​

        /// <summary>

        /// 弹出视频格式设置对话框

        /// </summary>

        public void SetCaptureFormat()

        {

            AviCapture.CAPDRIVERCAPS caps = new AviCapture.CAPDRIVERCAPS();

            AviCapture.SendMessage(m_LwndC, AviCapture.WM_CAP_GET_CAPS, AviCapture.SizeOf(caps), ref caps);

            if (caps.fHasDlgVideoSource) {

                AviCapture.SendMessage(m_LwndC, AviCapture.WM_CAP_DLG_VIDEOFORMAT, 0, 0);

            }

        }

​

​

        #region 以下为私有函数

        private bool capDriverConnect(IntPtr lwnd, short i)

        {

            return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_DRIVER_CONNECT, i, 0);

        }

​

        private bool capDriverDisconnect(IntPtr lwnd)

        {

            return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_DRIVER_DISCONNECT, 0, 0);

        }

​

        private bool capPreview(IntPtr lwnd, bool f)

        {

            return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_SET_PREVIEW, f, 0);

        }

​

        private bool capPreviewRate(IntPtr lwnd, short wMS)

        {

            return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_SET_PREVIEWRATE, wMS, 0);

        }

​

        private bool capSetCallbackOnFrame(IntPtr lwnd, AviCapture.FrameEventHandler lpProc)

        {

            return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_SET_CALLBACK_FRAME, 0, lpProc);

        }

​

        private bool capSetVideoFormat(IntPtr hCapWnd, ref AviCapture.BITMAPINFO BmpFormat, int CapFormatSize)

        {

            return AviCapture.SendMessage(hCapWnd, AviCapture.WM_CAP_SET_VIDEOFORMAT, CapFormatSize, ref BmpFormat);

        }

​

        private void FrameCallBack(IntPtr lwnd, IntPtr lpVHdr)

        {

            AviCapture.VIDEOHDR videoHeader = new AviCapture.VIDEOHDR();

            byte[] VideoData;

            videoHeader = (AviCapture.VIDEOHDR)AviCapture.GetStructure(lpVHdr, videoHeader);

            VideoData = new byte[videoHeader.dwBytesUsed];

            AviCapture.Copy(videoHeader.lpData, VideoData);

            if (this.RecievedFrame != null)

                this.RecievedFrame(VideoData);

        }

        private bool capOverlay(IntPtr lwnd, bool f)

        {

            return AviCapture.SendMessage(lwnd, AviCapture.WM_CAP_SET_OVERLAY, f, 0);

        }

        #endregion

​

    }

​

    /// <summary>

    /// 视频辅助类

    /// </summary>

    internal class AviCapture

    {

        //通过调用acicap32.dll进行读取摄像头数据

        [DllImport("avicap32.dll")]

        public static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID);

        [DllImport("avicap32.dll")]

        public static extern bool capGetDriverDescriptionA(short wDriver, byte[] lpszName, int cbName, byte[] lpszVer, int cbVer);

        [DllImport("User32.dll")]

        public static extern bool SendMessage(IntPtr hWnd, int wMsg, bool wParam, int lParam);

        [DllImport("User32.dll")]

        public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, int lParam);

        [DllImport("User32.dll")]

        public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, FrameEventHandler lParam);

        [DllImport("User32.dll")]

        public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref BITMAPINFO lParam);

        [DllImport("User32.dll")]

        public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref CAPDRIVERCAPS lParam);

        [DllImport("User32.dll")]

        public static extern int SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);

        [DllImport("avicap32.dll")]

        public static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize);

​

        //部分常量

        public const int WM_USER = 0x400;

        public const int WS_CHILD = 0x40000000;

        public const int WS_VISIBLE = 0x10000000;

        public const int SWP_NOMOVE = 0x2;

        public const int SWP_NOZORDER = 0x4;

        public const int WM_CAP_DRIVER_CONNECT = WM_USER + 10;

        public const int WM_CAP_DRIVER_DISCONNECT = WM_USER + 11;

        public const int WM_CAP_SET_CALLBACK_FRAME = WM_USER + 5;

        public const int WM_CAP_SET_PREVIEW = WM_USER + 50;

        public const int WM_CAP_SET_PREVIEWRATE = WM_USER + 52;

        public const int WM_CAP_SET_VIDEOFORMAT = WM_USER + 45;

        public const int WM_CAP_SAVEDIB = WM_USER + 25;

        public const int WM_CAP_SET_OVERLAY = WM_USER + 51;

        public const int WM_CAP_GET_CAPS = WM_USER + 14;

        public const int WM_CAP_DLG_VIDEOFORMAT = WM_USER + 41;

        public const int WM_CAP_DLG_VIDEOSOURCE = WM_USER + 42;

        public const int WM_CAP_DLG_VIDEODISPLAY = WM_USER + 43;

        public const int WM_CAP_EDIT_COPY = WM_USER + 30;

        public const int WM_CAP_SET_SEQUENCE_SETUP = WM_USER + 64;

        public const int WM_CAP_GET_SEQUENCE_SETUP = WM_USER + 65;

​

​

        // 结构

        [StructLayout(LayoutKind.Sequential)]

        //VideoHdr

        public struct VIDEOHDR

        {

            [MarshalAs(UnmanagedType.I4)]

            public int lpData;

            [MarshalAs(UnmanagedType.I4)]

            public int dwBufferLength;

            [MarshalAs(UnmanagedType.I4)]

            public int dwBytesUsed;

            [MarshalAs(UnmanagedType.I4)]

            public int dwTimeCaptured;

            [MarshalAs(UnmanagedType.I4)]

            public int dwUser;

            [MarshalAs(UnmanagedType.I4)]

            public int dwFlags;

            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]

            public int[] dwReserved;

        }

​

        [StructLayout(LayoutKind.Sequential)]

        //BitmapInfoHeader

        public struct BITMAPINFOHEADER

        {

            [MarshalAs(UnmanagedType.I4)]

            public Int32 biSize;

            [MarshalAs(UnmanagedType.I4)]

            public Int32 biWidth;

            [MarshalAs(UnmanagedType.I4)]

            public Int32 biHeight;

            [MarshalAs(UnmanagedType.I2)]

            public short biPlanes;

            [MarshalAs(UnmanagedType.I2)]

            public short biBitCount;

            [MarshalAs(UnmanagedType.I4)]

            public Int32 biCompression;

            [MarshalAs(UnmanagedType.I4)]

            public Int32 biSizeImage;

            [MarshalAs(UnmanagedType.I4)]

            public Int32 biXPelsPerMeter;

            [MarshalAs(UnmanagedType.I4)]

            public Int32 biYPelsPerMeter;

            [MarshalAs(UnmanagedType.I4)]

            public Int32 biClrUsed;

            [MarshalAs(UnmanagedType.I4)]

            public Int32 biClrImportant;

        }

​

        [StructLayout(LayoutKind.Sequential)]

        //BitmapInfo

        public struct BITMAPINFO

        {

            [MarshalAs(UnmanagedType.Struct, SizeConst = 40)]

            public BITMAPINFOHEADER bmiHeader;

            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1024)]

            public Int32[] bmiColors;

        }

​

        [StructLayout(LayoutKind.Sequential)]

        public struct CAPDRIVERCAPS

        {

            [MarshalAs(UnmanagedType.U2)]

            public UInt16 wDeviceIndex;

            [MarshalAs(UnmanagedType.Bool)]

            public bool fHasOverlay;

            [MarshalAs(UnmanagedType.Bool)]

            public bool fHasDlgVideoSource;

            [MarshalAs(UnmanagedType.Bool)]

            public bool fHasDlgVideoFormat;

            [MarshalAs(UnmanagedType.Bool)]

            public bool fHasDlgVideoDisplay;

            [MarshalAs(UnmanagedType.Bool)]

            public bool fCaptureInitialized;

            [MarshalAs(UnmanagedType.Bool)]

            public bool fDriverSuppliesPalettes;

            [MarshalAs(UnmanagedType.I4)]

            public int hVideoIn;

            [MarshalAs(UnmanagedType.I4)]

            public int hVideoOut;

            [MarshalAs(UnmanagedType.I4)]

            public int hVideoExtIn;

            [MarshalAs(UnmanagedType.I4)]

            public int hVideoExtOut;

        }

​

​

        public delegate void FrameEventHandler(IntPtr lwnd, IntPtr lpVHdr);

​

        // 公共函数

        public static object GetStructure(IntPtr ptr, ValueType structure)

        {

            return Marshal.PtrToStructure(ptr, structure.GetType());

        }

​

        public static object GetStructure(int ptr, ValueType structure)

        {

            return GetStructure(new IntPtr(ptr), structure);

        }

​

        public static void Copy(IntPtr ptr, byte[] data)

        {

            Marshal.Copy(ptr, data, 0, data.Length);

        }

​

        public static void Copy(int ptr, byte[] data)

        {

            Copy(new IntPtr(ptr), data);

        }

​

        public static int SizeOf(object structure)

        {

            return Marshal.SizeOf(structure);

        }

    }