tree 1a8cef75a9cc88fe9c8306071ad6601cae1a8336
parent 7c01d22c53ce995c4c0acdeb430f6ef1c55a79af
author Peng Bin <binpengsmail@gmail.com> 1535964046 +0800
committer Yunqing Wang <yunqingwang@google.com> 1536165861 +0000

Add speed feature obmc_full_pixel_search_level

A full range full pixel motion search is done for
motion mode OBMC_CAUSAL, but the search result very
likely is just around the start point(The full range
search result of SIMPLE_TRANSLATION). Maybe only a
small range refine is needed.

This speed feature is controled by
sf.obmc_full_pixel_search_level.
Enabled at speed level 1 and above.
For speed level 0, still do a full range search.
For speed level 1 and above just do a small range
refine around start point.

For encoder, about 1.4% faster shows by encoding
20 frame of BasketballDrill_832x480_50.y4m at 800kbps
on speed 1. ( 211924 ms -> 208941 ms)
The coding performance is 0.01% gain on average.

STATS_CHANGED expected

Change-Id: I9b5bf28d1a7b2e60d24aa36cedfeb7665e3f3722