tree 6b084f619a6832dbe02da7ef67cf6766089ca9fe
parent 1dbb8c120809f352317a12a62f78b67a997173df
author chiyotsai <chiyotsai@google.com> 1538767350 -0700
committer Chi Yo Tsai <chiyotsai@google.com> 1542137040 +0000

Introduce full_pixel_motion_search_based_split

This speed feature performs a full_pixel_motion_search with a single
frame prior to PARTITION_NONE and use the residue variance to decide
whether to split directly and skip other modes.

Currently it is only enable on speed 1.

Performance:
        | LOWRES | MIDRES |
  BDBR  | 0.030% | 0.078% |
Delta-T | 6.602% | 6.396% |

BDBR is calculated over 60 frames on the lowres and midres set. Delta-T
(average time reduction) is calculated with 5 clips over 4 bitrates
uniformly sampled on the default bitrate sets over 30 frames.

STATS_CHANGED

Change-Id: I9021c53e588f6647f90699521a93a902a90516dd