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操作摄像头(C#)

今天带来了一个icon转换,现在拿出来一个操作摄像头的源码,学习下吧.

 

[][1]
哎,后边那东北的娃儿在看赵本山.<

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;namespace Scene
{
public class VideoWork
{
//窗体风格
private const int WM_USER = x400;
private const int WS_CHILD = x40000000;
private const int WS_VISIBLE = x10000000;
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 bWorkStart = false;
private IntPtr mControlPtr;
private int mWidth;
private int mHeight;
private int mLeft;
private int mTop;/**/
/// </span>
/// 初始化显示图像
/// </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 VideoWork(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);</p>

//
//这里特别注意,因为WinAPI中的long为32位,而C#中的long为64wei,所以需要将lParam该为int
//
        [DllImport("User32.dll")]
private static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam);

/**/
///

</span>
/// 开始显示图像
/// </summary>
public void Start()
{
if (bWorkStart)
return; </p>

bWorkStart = true;
byte[] lpszName = new byte[100];

hWndC = capCreateCaptureWindowA(lpszName, WS_CHILD | WS_VISIBLE, mLeft, mTop, mWidth, mHeight, mControlPtr, );

if (hWndC.ToInt32() != )
{
SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, , );
SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, , );
SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, , );
SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, , );
SendMessage(hWndC, WM_CAP_SET_SCALE, 1, );
SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, );
SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, );
SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, );
//Global.log.Write(“SendMessage”);
}
return;

}
/**/
///

</span>
/// 停止显示
/// </summary>
public void Stop()
{
SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, , );
bWorkStart = false;
}
/**/
/// </span>
/// 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, , hBmp.ToInt32());
}
}
} </p> </div> 下载源码 转载请注明:[于哲的博客][2] » [操作摄像头(C#)][3] [1]: http://lazynight.me/wp-content/uploads/2012/03/zz.jpg [2]: http://lazynight.me [3]: http://lazynight.me/1537.html