C#实现控制摄像头的类
本文实例讲述了C#实现控制摄像头的类。分享给大家供大家参考。具体如下：
///<summary>
///一个控制摄像头的类
///</summary>
publicclassPick
{
privateconstintWM_USER=0x400;
privateconstintWS_CHILD=0x40000000;
privateconstintWS_VISIBLE=0x10000000;
privateconstintWM_CAP_START=WM_USER;
privateconstintWM_CAP_STOP=WM_CAP_START+68;
privateconstintWM_CAP_DRIVER_CONNECT=WM_CAP_START+10;
privateconstintWM_CAP_DRIVER_DISCONNECT=WM_CAP_START+11;
privateconstintWM_CAP_SAVEDIB=WM_CAP_START+25;
privateconstintWM_CAP_GRAB_FRAME=WM_CAP_START+60;
privateconstintWM_CAP_SEQUENCE=WM_CAP_START+62;
privateconstintWM_CAP_FILE_SET_CAPTURE_FILEA=WM_CAP_START+20;
privateconstintWM_CAP_SEQUENCE_NOFILE=WM_CAP_START+63;
privateconstintWM_CAP_SET_OVERLAY=WM_CAP_START+51;
privateconstintWM_CAP_SET_PREVIEW=WM_CAP_START+50;
privateconstintWM_CAP_SET_CALLBACK_VIDEOSTREAM=WM_CAP_START+6;
privateconstintWM_CAP_SET_CALLBACK_ERROR=WM_CAP_START+2;
privateconstintWM_CAP_SET_CALLBACK_STATUSA=WM_CAP_START+3;
privateconstintWM_CAP_SET_CALLBACK_FRAME=WM_CAP_START+5;
privateconstintWM_CAP_SET_SCALE=WM_CAP_START+53;
privateconstintWM_CAP_SET_PREVIEWRATE=WM_CAP_START+52;
privateIntPtrhWndC;
privateboolbStat=false;
privateIntPtrmControlPtr;
privateintmWidth;
privateintmHeight;
privateintmLeft;
privateintmTop;
///<summary>
///初始化摄像头
///</summary>
///<paramname="handle">控件的句柄</param>
///<paramname="left">开始显示的左边距</param>
///<paramname="top">开始显示的上边距</param>
///<paramname="width">要显示的宽度</param>
///<paramname="height">要显示的长度</param>
publicPick(IntPtrhandle,intleft,inttop,intwidth,intheight)
{
mControlPtr=handle;
mWidth=width;
mHeight=height;
mLeft=left;
mTop=top;
}
[DllImport("avicap32.dll")]
privatestaticexternIntPtrcapCreateCaptureWindowA(byte[]lpszWindowName,intdwStyle,intx,inty,intnWidth,intnHeight,IntPtrhWndParent,intnID);
[DllImport("avicap32.dll")]
privatestaticexternintcapGetVideoFormat(IntPtrhWnd,IntPtrpsVideoFormat,intwSize);
[DllImport("User32.dll")]
privatestaticexternboolSendMessage(IntPtrhWnd,intwMsg,intwParam,longlParam);
///<summary>
///开始显示图像
///</summary>
publicvoidStart()
{
if(bStat)
return;
bStat=true;
byte[]lpszName=newbyte[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>
publicvoidStop()
{
SendMessage(hWndC,WM_CAP_DRIVER_DISCONNECT,0,0);
bStat=false;
}
///<summary>
///抓图
///</summary>
///<paramname="path">要保存bmp文件的路径</param>
publicvoidGrabImage(stringpath)
{
IntPtrhBmp=Marshal.StringToHGlobalAnsi(path);
SendMessage(hWndC,WM_CAP_SAVEDIB,0,hBmp.ToInt64());
}
///<summary>
///录像
///</summary>
///<paramname="path">要保存avi文件的路径</param>
publicvoidKinescope(stringpath)
{
IntPtrhBmp=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>
publicvoidStopKinescope()
{
SendMessage(hWndC,WM_CAP_STOP,0,0);
}
}
希望本文所述对大家的C#程序设计有所帮助。