Accurate Timestamp via G2GetGrabStatus

Programming Questions C-style API
1

We retrieve the timestamp of the current image via the following call: G2GetGrabStatus(hCamera, GRAB_INFO_TIMESTAMP, camTimestamp);
As described in the manual, camTimestamp is a double value, which might cause accuracy loss due to the conversion from the original timestamp (i.e. int64).
Is there any possibility to get the raw timestamp via the C/C++ API for the current image?

We need the value since we are using a JAI SP5000M camera where the 64bit internal time representation is constructed as follows (as described by a JAI engineer): 35 bit of the counter are LSB which represents the internal counter, 29 Bits are MSB which come from the PTP server.

We use Ubuntu 16.04.5 with CVB 12.00.002

2

Yes, there will be precision loss. The question is more whether it will affect you:

The largest integer being able to be stored without precision loss is 253, which results in 285.62 years with microseconds granularity. So if IEEE 1588 (which normally uses 1970/01/01 as its time base) is used you can work until the year 2255.

If you are using the GenICam.vin, though, you can access the time stamp via device control DC_BUFFER_INFO_TIMESTAMP (defined in iDC_GenICam.h):

cvbuint64_t dummy = 0, timeStamp = 0;
size_t sizeOfTimeStamp = sizeof(cvbuint64_t);
cvbres_t result = DCBinaryCommand
  (
    hCamera,
    DeviceCtrlCmd(DC_BUFFER_INFO_TIMESTAMP, DC_GET),
    &dummy, sizeOfTimeStamp ,
    &timeStamp, sizeOfTimeStamp 
  );
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