Add get_mv_from_mv_mode()

Given an mv_mode, this function will return the corresponding mv.

find_ref_mv()
A helper function finds the nearest and near mvs from the neighbor
blocks.

select_mv_arr[]
An array used for storing selected motion vectors.

Change-Id: Ibeb434007f65b2c6e461360f208d99455e76bcbf
2 files changed