public WebCam(System.Windows.Forms.PictureBox preview)
{
ClearMem();
cpParams = new CAPTUREPARMS();
vsCallback = new VideoStreamCallback(CallbackVideoStream);
hPrevideWindow = capCreateCaptureWindow("picCam", WS_VISIBLE | WS_CHILD, 0, 0, preview.Width, preview.Height, preview.Handle, 0);
SendMessage(hPrevideWindow, WM_CAP_DRIVER_CONNECT, IntPtr.Zero, IntPtr.Zero);
SendMessage(hPrevideWindow, WM_CAP_DRIVER_CONNECT, IntPtr.Zero, IntPtr.Zero);
SendMessage(hPrevideWindow, WM_CAP_SET_PREVIEWRATE, new IntPtr(100), IntPtr.Zero);
SendMessage(hPrevideWindow, WM_CAP_DRIVER_CONNECT, new IntPtr(1), IntPtr.Zero);
SendMessage(hPrevideWindow, WM_CAP_DRIVER_CONNECT, new IntPtr(1), IntPtr.Zero);
IntPtr lParam = Marshal.AllocHGlobal(Marshal.SizeOf(cpParams));
if (SendMessage(hPrevideWindow, WM_CAP_GET_SEQUENCE_SETUP, new IntPtr(Marshal.SizeOf(cpParams)), lParam) != IntPtr.Zero)
{
cpParams = Marshal.PtrToStructure <CAPTUREPARMS>(lParam);
cpParams.fYield = 1;
cpParams.fAbortLeftMouse = 0;
cpParams.fAbortRightMouse = 0;
Marshal.StructureToPtr(cpParams, lParam, true);
}
Marshal.FreeHGlobal(lParam);
lParam = Marshal.AllocHGlobal(Marshal.SizeOf(bmiVideoFormat));
if (SendMessage(hPrevideWindow, WM_CAP_GET_VIDEOFORMAT, new IntPtr(Marshal.SizeOf(bmiVideoFormat)), lParam) != IntPtr.Zero)
{
bmiVideoFormat.bmiHeader = Marshal.PtrToStructure <BITMAPINFOHEADER>(lParam);
PictureData = new byte[bmiVideoFormat.bmiHeader.biSizeImage - 1];
}
Marshal.FreeHGlobal(lParam);
}
public static extern IntPtr InitialVideoSource(
ref ZWVideoParam param,
VideoStreamCallback OnVideoStreamReady, /*实时视频流回调*/
RealTimeImageCallback OnRealImgReady, /*实时图像输出回调*/
RealTimeImageCallback OnRealFixFmtImgReady, /*实时转码图像输出回调*/
ZW_PIX_FMT realFixFmt, /*实时转码图像的格式*/
TriggerImageCallback OnTriggerImgReady, /*外部触发抓拍图片回调*/
TriggerImageCallback OnTriggerFixFmtImgReady, /*外部触发抓拍转码图片回调*/
ZW_PIX_FMT triggerFixFmt, /*外部触发抓拍转码图片的格式*/
IntPtr cbData);
