一个摄像头使用实例，第四部分（主方法）
//web camera class
public class WebCamera
{
showVideo.BITMAPINFO bitmapinfo = new showVideo.BITMAPINFO();
// Constructur
public WebCamera(IntPtr handle, int width, int height)
{
mControlPtr = handle;
mWidth = width;
mHeight = height;
bitmapinfo.bmiHeader.biSize = showVideo.SizeOf(bitmapinfo.bmiHeader);
bitmapinfo.bmiHeader.biWidth = width;
bitmapinfo.bmiHeader.biHeight = height;
bitmapinfo.bmiHeader.biPlanes = 1;
bitmapinfo.bmiHeader.biBitCount = 24;
}
// delegate for frame callback
public delegate void RecievedFrameEventHandler(byte[] data);
public event RecievedFrameEventHandler RecievedFrame;
private IntPtr lwndC; // Holds the unmanaged handle of the control
private IntPtr mControlPtr; // Holds the managed pointer of the control
private int mWidth;
private int mHeight;
private showVideo.FrameEventHandler mFrameEventHandler; // Delegate instance for the frame callback - must keep alive! gc should NOT collect it
// Close the web camera
public void CloseWebcam()
{
this.capDriverDisconnect(this.lwndC);
}
// start the web camera
public void StartWebCam()
{
byte[] lpszName = new byte[100];
byte[] lpszVer = new byte[100];
int DriverCount = 0;
if (showVideo.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100) )
{
DriverCount++;
}
if (DriverCount == 0)
{
MessageBox.Show("未发现视频设备");
return;
}
this.lwndC = showVideo.capCreateCaptureWindowA(lpszName, showVideo.WS_VISIBLE + showVideo.WS_CHILD, 0, 0, mWidth, mHeight, mControlPtr, 0);
if (this.capDriverConnect(this.lwndC, 0))
{
this.capPreviewRate(this.lwndC, 66);
this.capPreview(this.lwndC, true);
this.capSetVideoFormat(this.lwndC, ref bitmapinfo, showVideo.SizeOf(bitmapinfo));
this.mFrameEventHandler = new showVideo.FrameEventHandler(FrameCallBack);
this.capSetCallbackOnFrame(this.lwndC, this.mFrameEventHandler);
//设置每帧结束后调用的回调函数
showVideo.SetWindowPos(this.lwndC, 0, 0, 0, mWidth, mHeight, 6);
}
else
{
// MessageBox.Show("捕获连接卡失败", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
// private functions
private bool capDriverConnect(IntPtr lwnd, short i)
{
return showVideo.SendMessage(lwnd, showVideo.WM_CAP_DRIVER_CONNECT, i, 0);
}
private bool capDriverDisconnect(IntPtr lwnd)
{
return showVideo.SendMessage(lwnd, showVideo.WM_CAP_DRIVER_DISCONNECT, 0, 0);
}
private bool capPreview(IntPtr lwnd, bool f)
{
return showVideo.SendMessage(lwnd, showVideo.WM_CAP_SET_PREVIEW, f, 0);
}
private bool capPreviewRate(IntPtr lwnd, short wms)
{
return showVideo.SendMessage(lwnd, showVideo.WM_CAP_SET_PREVIEWRATE, wms, 0);
}
private bool capSetCallbackOnFrame(IntPtr lwnd, showVideo.FrameEventHandler lpProc)
{
return showVideo.SendMessage(lwnd, showVideo.WM_CAP_SET_CALLBACK_FRAME, 0, lpProc);
}
private bool capSetVideoFormat(IntPtr hCapWnd, ref showVideo.BITMAPINFO BmpFormat, int CapFormatSize)
{
return showVideo.SendMessage(hCapWnd, showVideo.WM_CAP_SET_VIDEOFORMAT, CapFormatSize, ref BmpFormat);
}
private void FrameCallBack(IntPtr lwnd, IntPtr lpVHdr)
{
showVideo.VIDEOHDR videoHeader = new showVideo.VIDEOHDR();
byte[] VideoData;
videoHeader = (showVideo.VIDEOHDR)showVideo.GetStructure(lpVHdr, videoHeader);
VideoData = new byte[videoHeader.dwBytesUsed];
showVideo.Copy(videoHeader.lpData, VideoData);
if (this.RecievedFrame != null)
this.RecievedFrame(VideoData);
}
}
这里面有没有让"WebCamera"拍照的方法，如果没有哪位大侠可不可以来一个。。。
这个类的实现思路是怎样的？？？
[解决办法]
StartWebCam() 关闭摄像头
capGetDriverDescription 描述驱动
压缩
ICCompressBegin
ICCompress
ICCompressEnd
解压
ICDecompressBegin
ICDecompress
ICDecompressEnd
ICOpen(icInfo.fccType, icInfo.fccHandler, ICMODE_QUERY);
得到HIC列表
ICGetInfo得到HIC列表详细信息，设置好输出格式，就可以了
是VFW实现的？
[解决办法]
英文的可以吗？
http://space.cnblogs.com/group/topic/7423/
[解决办法]
参考这个吧
http://www.cnblogs.com/cdts_change/archive/2010/11/25/1888110.html
[解决办法]
观摩技术性讨论
[解决办法]
