// 窗口消息 WM_CAP... 哪个是送到 AVICAP 窗口// ------------------------------------------------------------------// 开始定义消息参数 整数型const avicap32='avicap32.dll';WM_CAP_START= WM_USER=1024;// start of unicode messagesWM_CAP_UNICODE_START= WM_USER+100; //开始WM_CAP_GET_CAPSTREAMPTR= (WM_CAP_START+ 1); //获得 CAPSTR EAMPTRWM_CAP_SET_CALLBACK_ERROR= (WM_CAP_START+ 2); //设置回调错误WM_CAP_SET_CALLBACK_STATUS= (WM_CAP_START+ 3); //设置回调状态WM_CAP_SET_CALLBACK_YIELD= (WM_CAP_START+ 4); //设置回调出产WM_CAP_SET_CALLBACK_FRAME= (WM_CAP_START+ 5); //设置回调结构WM_CAP_SET_CALLBACK_VIDEOSTREAM= (WM_CAP_START+ 6); //设置回调视频流WM_CAP_SET_CALLBACK_WAVESTREAM= (WM_CAP_START+ 7); //设置回调视频波流WM_CAP_GET_USER_DATA =(WM_CAP_START+ 8); //获得使用者数据WM_CAP_SET_USER_DATA =(WM_CAP_START+ 9) ; //设置使用者数据WM_CAP_DRIVER_CONNECT =(WM_CAP_START+ 10); //驱动程序连接WM_CAP_DRIVER_DISCONNECT =(WM_CAP_START+ 11); //断开启动程序连接WM_CAP_DRIVER_GET_NAME =(WM_CAP_START+ 12); //获得驱动程序名字WM_CAP_DRIVER_GET_VERSION =(WM_CAP_START+ 13); //获得驱动程序版本WM_CAP_DRIVER_GET_CAPS =(WM_CAP_START+ 14); //获得驱动程序性能WM_CAP_FILE_SET_CAPTURE_FILE =(WM_CAP_START+ 20); //设置捕获文件的文件名WM_CAP_FILE_GET_CAPTURE_FILE =(WM_CAP_START+ 21); //获得捕获文件的文件名WM_CAP_FILE_SAVEAS =(WM_CAP_START+ 23); //另存文件为WM_CAP_FILE_SAVEDIB =(WM_CAP_START+ 25); //保存文件// out of order to save on ifdefsWM_CAP_FILE_ALLOCATE =(WM_CAP_START+ 22); //分派文件, 为捕获文件建一个指定大小的文件WM_CAP_FILE_SET_INFOCHUNK =(WM_CAP_START+ 24); //设置开始文件WM_CAP_EDIT_COPY =(WM_CAP_START+ 30); //编辑复制,把图象考入剪贴板WM_CAP_SET_AUDIOFORMAT =(WM_CAP_START+ 35); //设置音频格式WM_CAP_GET_AUDIOFORMAT =(WM_CAP_START+ 36); //捕获音频格式WM_CAP_DLG_VIDEOFORMAT =(WM_CAP_START+ 41); //1065 打开视频格式设置对话框, 选择数字视频的框架大小和视频图像的色深，以及捕获视频图像的压缩格式。WM_CAP_DLG_VIDEOSOURCE =(WM_CAP_START+ 42); //1066 打开属性设置对话框，设置对比度、亮度等。(视频源对话框) 选择视频输入通道和视频图像的动态参数。WM_CAP_DLG_VIDEODISPLAY =(WM_CAP_START+ 43); //1067 打开视频显示对话框WM_CAP_GET_VIDEOFORMAT =(WM_CAP_START+ 44); //1068 获得视频格式WM_CAP_SET_VIDEOFORMAT =(WM_CAP_START+ 45); //1069 设置视频格式WM_CAP_DLG_VIDEOCOMPRESSION =(WM_CAP_START+ 46); //1070 打开压缩设置对话框WM_CAP_SET_PREVIEW =(WM_CAP_START+ 50); //设置预览模式WM_CAP_SET_OVERLAY =(WM_CAP_START+ 51); //设置覆盖WM_CAP_SET_PREVIEWRATE =(WM_CAP_START+ 52); //设置预览模式下图像的帧速度WM_CAP_SET_SCALE =(WM_CAP_START+ 53); //设置预览视频的缩放比例WM_CAP_GET_STATUS =(WM_CAP_START+ 54); //获得状态WM_CAP_SET_SCROLL =(WM_CAP_START+ 55); //设置卷WM_CAP_GRAB_FRame =(WM_CAP_START+ 60); //逮捕结构WM_CAP_GRAB_FRame_NOSTOP =(WM_CAP_START+ 61); //停止逮捕结构,截取当前图象WM_CAP_SEQUENCE =(WM_CAP_START+ 62); //次序，捕捉到文件WM_CAP_SEQUENCE_NOFILE =(WM_CAP_START+ 63); //没有文件WM_CAP_SET_SEQUENCE_SETUP =(WM_CAP_START+ 64); //设置当前捕获的帧频率WM_CAP_GET_SEQUENCE_SETUP =(WM_CAP_START+ 65); //获得当前捕获的帧频率WM_CAP_SET_MCI_DEVICE =(WM_CAP_START+ 66); //设置媒体控制接口WM_CAP_GET_MCI_DEVICE =(WM_CAP_START+ 67); //获得媒体控制接口WM_CAP_STOP =(WM_CAP_START+ 68); //停止捕捉WM_CAP_ABORT =(WM_CAP_START+ 69); //异常中断WM_CAP_SINGLE_FRame_OPEN =(WM_CAP_START+ 70); //打开单一的结构WM_CAP_SINGLE_FRame_CLOSE =(WM_CAP_START+ 71); //关闭单一的结构WM_CAP_SINGLE_FRame =(WM_CAP_START+ 72); //单一的结构WM_CAP_PAL_OPEN =(WM_CAP_START+ 80); //打开视频WM_CAP_PAL_SAVE =(WM_CAP_START+ 81); //保存视频WM_CAP_PAL_PASTE =(WM_CAP_START+ 82); //粘贴视频WM_CAP_PAL_AUTOCREATE =(WM_CAP_START+ 83); //自动创造WM_CAP_PAL_MANUALCREATE =(WM_CAP_START+ 84); //手动创造// Following added post VFW 1.1WM_CAP_SET_CALLBACK_CAPCONTROL =(WM_CAP_START+ 85); // 设置收回的错误WM_CAP_END =WM_CAP_SET_CALLBACK_CAPCONTROL; using System; using System.Runtime.InteropServices; using System.Drawing; using System.Drawing.Imaging; namespace PickHead { /// <summary> /// 一个控制摄像头的类 /// </summary> public class Pick { private const int WM_USER = 0x400; private const int WS_CHILD = 0x40000000; private const int WS_VISIBLE = 0x10000000; private const int WM_CAP_START = WM_USER; private const int 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_SEQUENCE = 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; 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_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; private int mTop; /// <summary> /// 初始化摄像头 /// </summary> /// <param name="handle">控件的句柄</param> /// <param name="left">开始显示的左边距</param> /// <param name="top">开始显示的上边距</param> /// <param name="width">要显示的宽度</param> /// <param name="height">要显示的长度</param> public Pick(IntPtr handle, int left, int top, int width,int height) { mControlPtr = handle; mWidth = width; mHeight = height; mLeft = left; mTop = top; } [DllImport("avicap32.dll")] private static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int 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); /// <summary> /// 开始显示图像 /// </summary> public void Start() { if (bStat) return; bStat = true; byte[] lpszName = new byte[100]; hWndC = capCreateCaptureWindowA(lpszName,WS_CHILD|WS_VISIBLE ,mLeft,mTop,mWidth,mHeight,mControlPtr,0); if (hWndC.ToInt32() != 0) { SendMessage(hWndC, WM_CAP_SET_CALLBACK_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); SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0); SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0); } return; } /// <summary> /// 停止显示 /// </summary> public void Stop() { SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0); bStat = false; } /// <summary> /// 抓图 /// </summary> /// <param name="path">要保存bmp文件的路径</param> public void GrabImage(string path) { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); SendMessage(hWndC,WM_CAP_SAVEDIB,0,hBmp.ToInt64()); } /// <summary> /// 录像 /// </summary> /// <param name="path">要保存avi文件的路径</param> public void Kinescope(string path) { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); SendMessage(hWndC,WM_CAP_FILE_SET_CAPTURE_FILEA,0,hBmp.ToInt64()); SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0); } /// <summary> /// 停止录像 /// </summary> public void StopKinescope() { SendMessage(hWndC, WM_CAP_STOP, 0, 0); } } }
