摄像头程序

using System; using System.Runtime.InteropServices; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Drawing.Imaging; using System.Text; using System.Windows.Forms;

namespace WindowsApplication5 { public partial class Form1 : Form { public Form1() { InitializeComponent(); }

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;

public static int WM_CAP_DLG_VIDEOSOURCE = (WM_CAP_START + 42); //选择摄像头

private IntPtr hWndC; private bool bStat = false;

private IntPtr mControlPtr; private int mWidth; private int mHeight; private int mLeft; 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; 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, int lParam);

/// /// 开始显示图像 /// 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; } /// /// 停止显示 /// public void Stop() { SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0); bStat = false; }

/// /// 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.ToInt32()); }

/// /// 录像 /// /// 要保存avi文件的路径 public void Kinescope(string path) { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); SendMessage(hWndC, WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt32()); SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0); }

/// /// 停止录像 /// public void StopKinescope() { SendMessage(hWndC, WM_CAP_STOP, 0, 0); }

/// /// /// public void SetShow() { SendMessage(hWndC, WM_CAP_DLG_VIDEOSOURCE, 0, 0); } }

private void button1_Click(object sender, EventArgs e) { try { SaveFileDialog SaveFileDialog1 = new SaveFileDialog(); SaveFileDialog1.Filter = "bmp files (*.bmp)|*.bmp|jpg files (*