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);
}
}
/// <summary>
/// 打开摄像头
/// </summary>
public void StartWebCam()
{
byte[] lpszName = new byte[100];
byte[] lpszVer = new byte[100];
ShowVideo.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100);
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);
ShowVideo.BITMAPINFO bitmapinfo = new ShowVideo.BITMAPINFO();
bitmapinfo.bmiHeader.biSize = ShowVideo.SizeOf(bitmapinfo.bmiHeader);
bitmapinfo.bmiHeader.biWidth = 352;
bitmapinfo.bmiHeader.biHeight = 288;
bitmapinfo.bmiHeader.biPlanes = 1;
bitmapinfo.bmiHeader.biBitCount = 24;
this.capSetVideoFormat(this.lwndC, ref bitmapinfo, ShowVideo.SizeOf(bitmapinfo));
this.mFrameEventHandler = new ShowVideo.FrameEventHandler(FrameCallBack);
this.capSetCallbackOnFrame(this.lwndC, this.mFrameEventHandler);
ShowVideo.SetWindowPos(this.lwndC, 0, 0, 0, mWidth, mHeight, 6);
}
}
private bool capSetVideoFormat(IntPtr hCapWnd, ref ShowVideo.BITMAPINFO BmpFormat, int CapFormatSize)
{
return(ShowVideo.SendMessage(hCapWnd, ShowVideo.WM_CAP_SET_VIDEOFORMAT, CapFormatSize, ref BmpFormat));
}
private bool capSetCallbackOnFrame(IntPtr lwnd, ShowVideo.FrameEventHandler lpProc)
{
return(ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_SET_CALLBACK_FRAME, 0, lpProc));
}
private bool capPreviewRate(IntPtr lwnd, short wMS)
{
return(ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_SET_PREVIEWRATE, wMS, 0));
}
private bool capPreview(IntPtr lwnd, bool f)
{
return(ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_SET_PREVIEW, f, 0));
}
private bool capDriverDisconnect(IntPtr lwnd)
{
return(ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_DRIVER_DISCONNECT, 0, 0));
}
private bool capDriverConnect(IntPtr lwnd, short i)
{
return(ShowVideo.SendMessage(lwnd, ShowVideo.WM_CAP_DRIVER_CONNECT, i, 0));
}