Using 1D array to get the data from user function

Using 1D array to get the data from user function

It is not good to get the user data as 3D std::vector format. C does
not support it. Therefore it is much better to get the data as 1D
float array (float *). In this PR, re-define function pointer to get
data as float * format.

**Self evaluation:**
1. Build test:	 [X]Passed [ ]Failed [ ]Skipped
2. Run test:	 [X]Passed [ ]Failed [ ]Skipped

Signed-off-by: jijoong.moon <jijoong.moon@samsung.com>