Is there any samples of LUT_Trilinear ?

I want to use nppiLUT_Trilinear_8u_AC4IR or nppiLUT_Trilinear_8u_AC4R, but could not know how to use it.

Especially below 3 params’s meaning is Obscure. Please explain them with specifi codes. Very thanks a lot.

pValues Device pointer to aLevels[2] number of contiguous 2D x,y planes of 4-byte packed RGBX
values containing the user defined base OUTPUT values at that x,y, and z (R,G,B) level location.
Each level must contain x y 4-byte packed pixel values (4th byte is used for alignement only
and is ignored) in row (x) order.
pLevels Host pointer to an array of 3 host pointers, one per cube edge, pointing to user defined INPUT
level values.
aLevels Host pointer to an array of 3 user defined number of input/output mapping points, one per
3D cube edge. aLevels[0] represents the number of x axis levels (Red), aLevels[1] represents the
number of y axis levels (Green), and aLevels[2] represets the number of z axis levels (Blue).