GetFloats for multiple indexes

Hi,
May be being silly here but for the life of me can't figure this out.
Reading ATEM status using the BMDSwitcherAPI

I have a Camera Controller that is notifying me on change for things like Aperture, Gain, etc.
It works for all the items in the protocol document where one Category/Parameter is one value
but I cannot work out the way for when it is multiple, for instance the four values I get from the gamma in colour category.
This works for iris

Code: Select all

double irisValue;
cameraValue.GetFloats(1, 0, 2, 1, out irisValue);

This gets me the value of 'red' I think. if I change '4' to any other value e.g. try and get indexes 0-3 or something, it fails with error of out of range

Code: Select all

double lift1;
cameraValue.GetFloats(1, 8, 0, 4, out lift1);

this gives an error, for instance

Code: Select all

double lift1;
cameraValue.GetFloats(1, 8, 0, 0, out lift1);

[Cameron Nichols]

Hi Ben,

Try working with unmanaged code for this task:

Code: Select all

double[] readLiftAdjust = new double[4];
IntPtr readLiftAdjustPtr = Marshal.AllocHGlobal(Marshal.SizeOf(readLiftAdjust[0]) * readLiftAdjust.Length);

try
{
   unsafe
   {
      double* readLiftAdjustDeref = (double*)readLiftAdjustPtr.ToPointer();
      cameraControl.GetFloats(
         cameraNumber,                   // Camera number
         8,                              // Color Correction
         0,                              // Lift Adjust
         (uint)readLiftAdjust.Length,    // Array size
         out *readLiftAdjustDeref        // Single element array with the desired value
      );
   }
   Marshal.Copy(readLiftAdjustPtr, readLiftAdjust, 0, readLiftAdjust.Length);
}
finally
{
   Marshal.FreeHGlobal(readLiftAdjustPtr);
}


Regards
Cameron