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1、本文是借助 avicap32.dll库来驱动摄像头。 做到了抓图、 录像功能。using System; using System.Runtime.InteropServices; using System.Drawing; using System.Drawing.Imaging; namespace using System; using System.Runtime.InteropServices; using System.Drawing; using System.Drawing.Imaging; namespace PickHead / / 一个控制摄像头的类/ public cl
2、ass Pick 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 1 页，共 9 页 - - - - - - - - - private const int WM_USER = 0 x400; private const int WS_CHILD = 0 x40000000; private const int WS_VISIBLE = 0 x10000000; private const int WM_CAP_START = WM_USER ; private const int
3、WM_CAP_STOP = WM_CAP_START + 68; private const int WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10; private const int WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11; private const int WM_CAP_SAVEDIB = WM_CAP_START+ 25; private const int WM_CAP_GRAB_FRAME = WM_CAP_START + 60; private const int WM_CAP_SEQUENC
4、E = WM_CAP_START + 62; private const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20; private const int WM_CAP_SEQUENCE_NOFILE = WM_CAP_START + 63; private const int WM_CAP_SET_OVERLAY = WM_CAP_START + 51; 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 2 页，共 9
5、页 - - - - - - - - - private const int WM_CAP_SET_PREVIEW = WM_CAP_START + 50; private const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START +6; private const int WM_CAP_SET_CALLBACK_ERROR=WM_CAP_START +2; private const int WM_CAP_SET_CALLBACK_STATUSA= WM_CAP_START +3; private const int WM_CAP_SET
6、_CALLBACK_FRAME= WM_CAP_START +5; private const int WM_CAP_SET_SCALE=WM_CAP_START + 53; private const int WM_CAP_SET_PREVIEWRATE=WM_CAP_START + 52; private IntPtr hWndC; private bool bStat = false; private IntPtr mControlPtr; private int mWidth; private int mHeight; private int mLeft; 名师资料总结 - - -精品
7、资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 3 页，共 9 页 - - - - - - - - - private int mTop; / / 初始化摄像头/ / 控件的句柄 / 开始显示的左边距 / 开始显示的上边距 / 要显示的宽度 / 要显示的长度 public Pick(IntPtr handle, int left, int top, int width,int height) mControlPtr = handle; mWidth = width; mHeight = height; mLef
8、t = left; mTop = top; 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 4 页，共 9 页 - - - - - - - - - DllImport(avicap32.dll) private static extern IntPtr capCreateCaptureWindowA(byte lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, i
9、nt nID); DllImport(avicap32.dll) private static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize ); DllImport(User32.dll) private static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, long lParam); / / 开始显示图像/ public void Start() if (bStat) 名师资料总结 - - -精品资料欢迎下载 -
10、 - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 5 页，共 9 页 - - - - - - - - - return; bStat = true; byte lpszName = new byte100; hWndC = capCreateCaptureWindowA(lpszName,WS_CHILD|WS_VISIBLE ,mLeft,mTop,mWidth,mHeight,mControlPtr,0); if (hWndC.ToInt32() != 0) SendMessage(hWndC, WM_CAP_SET_CAL
11、LBACK_VIDEOSTREAM, 0, 0); SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0); SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0); SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0); SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0); SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0); 名师资料总结 - - -精品资料欢迎下载 -
12、 - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 6 页，共 9 页 - - - - - - - - - SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0); SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0); return; / / 停止显示/ public void Stop() SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0); bStat = false; 名师资料总结 - - -精品资料欢迎
13、下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 7 页，共 9 页 - - - - - - - - - / / 抓图/ / 要保存 bmp 文件的路径 public void GrabImage(string path) IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); SendMessage(hWndC,WM_CAP_SAVEDIB,0,hBmp.ToInt64(); / / 录像/ / 要保存 avi 文件的路径 public void Kinescope(strin
14、g path) IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); SendMessage(hWndC,WM_CAP_FILE_SET_CAPTURE_名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 8 页，共 9 页 - - - - - - - - - FILEA,0,hBmp.ToInt64(); SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0); / / 停止录像/ public void StopKinescope() SendMessage(hWndC, WM_CAP_STOP, 0, 0); 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 9 页，共 9 页 - - - - - - - - -