tree 67a3ba09719610176b61d0b992ecc1524e3dee8c
parent ce1839c4367b9793b6d74501602dd3685b0bbf71
author chiyotsai <chiyotsai@google.com> 1565394507 -0700
committer Chi Yo Tsai <chiyotsai@google.com> 1565816156 +0000

Allocate mbmi on BLOCK_8X8 level for 4K+ videos

This commit change the allocation of cm->mi to one for each BLOCK_8X8
when the resolution is 4K or above.

Since most of the codebase assumes that the allocation done for each
BLOCK_4X4, we do not change how cm->mi_grid_base is allocated. i.e.
mi_grid_base is still allocated for each BLOCK_4X4, and some of them
are aliased to the same mi.

Total Memory Reduction:
2.6 GB => 2.5 GB, or ~4% reduction.

BUG=aomedia:2453

Change-Id: Ib3aa59761afffd063e1cff57becaf073ff7daff1