Scaling Jitter matrixes in C

Hi, I have 2 jitter matrix in C of different dimensions, one being source data, e.g. 1000x200, and the other being a destination matrix conforming to my required output size, e.g. 250x125.

Is it possible for me to process the contents of the first matrix into the 2nd so that Jitter handles all the scaling for me?

Cheers