/// <summary>实时抓拍一张图片</summary>
public int GrabOne(out IJFImage img, int timeoutMilSeconds = -1)
{
img = null;
if (!IsDeviceOpen)
{
return((int)ErrorDef.NotOpen);
}
if (!IsGrabbing)
{
return((int)ErrorDef.NotGrabbing);
}
JFCmrTrigMode currTM = JFCmrTrigMode.disable;
GetTrigMode(out currTM);
if (currTM != JFCmrTrigMode.disable)
{
return((int)ErrorDef.TrigModeUnMatch);
}
int err = 0;
if (_payloadSize <= 0)
{
MyCamera.MVCC_INTVALUE stVal = new MyCamera.MVCC_INTVALUE();
err = _hikCmr.MV_CC_GetIntValue_NET("PayloadSize", ref stVal);
if (MyCamera.MV_OK != err)
{
return((int)ErrorDef.InvokeFailed);
}
else
{
_payloadSize = (int)stVal.nCurValue;
}
}
byte[] dataBytes = new byte[_payloadSize];
IntPtr ptr = Marshal.UnsafeAddrOfPinnedArrayElement(dataBytes, 0);
MyCamera.MV_FRAME_OUT_INFO_EX frameInfo = new MyCamera.MV_FRAME_OUT_INFO_EX();
err = _hikCmr.MV_CC_GetOneFrameTimeout_NET(ptr, (uint)_payloadSize, ref frameInfo, timeoutMilSeconds);
if (err != MyCamera.MV_OK)
{
return((int)ErrorDef.InvokeFailed);
}
img = new JFImage_Hik(dataBytes, frameInfo, _hikCmr);
return((int)ErrorDef.Success);
}
void _HikFrameCallback(IntPtr pData, ref MV_FRAME_OUT_INFO_EX pFrameInfo)
{
MVCC_INTVALUE stVal = new MVCC_INTVALUE();
int err = _hikCmr.MV_CC_GetIntValue_NET("PayloadSize", ref stVal);
if (MyCamera.MV_OK != err)
{
throw new Exception("HikFrameCallback failed bt MV_CC_GetIntValue_NET(\"PayloadSize\") return errorCode = " + err);
}
_payloadSize = (int)stVal.nCurValue;
byte[] bytes = new byte[_payloadSize];
Marshal.Copy(pData, bytes, 0, _payloadSize);
JFImage_Hik img = new JFImage_Hik(bytes, pFrameInfo, _hikCmr);
if (null != AcqFrameEvent)
{
AcqFrameEvent(this, img);
}
}
