commit 16056f5b22c58295645625072441ef3b85637126
author Debargha Mukherjee <debargha@google.com> Wed Apr 12 16:10:50 2017 -0700
committer Debargha Mukherjee <debargha@google.com> Thu Apr 13 18:48:43 2017 +0000
tree 319c0c032d1eab3a73be9ab51d787d9b484183ed
parent cfe0fede62bcef798439edebfb7124ec98281bf4

Adds option to use 1/32 subpel precision for gm/wm

Adds filters for 1/32 subpel precision for warping.
To use 1/32 subpel precision make WARPEDPIXEL_PREC_BITS 5.
By default, WARPEDPIXEL_PREC_BITS is set as 6 in common/mv.h,
which uses 1/64 subpel precision.

If 1/32 precision is used, BDRATE drops:
on lowres:
-1.101 (vs. -1.186% with 1/64) w/warped-motion
-1.587 (vs. -1.650% with 1/64) w/global-motion

on cam_lowres:
-2.638 (vs. -2.707% with 1/64) w/warped-motion
-3.396 (vs. -3.453% with 1/64) w/global-motion

Change-Id: I82fbfddaad9bd9be658fe382401d212833c7ceef