tree 165696f74907d4e7af27250e2056fdf0acb36896
parent 5e3f1b35ed9a9d877fda213cbdf0a6eb25226a21
author Chi Yo Tsai <chiyotsai@google.com> 1690910110 +0000
committer Urvang Joshi <urvang@google.com> 1690910110 +0000

Explicitly set chroma ref info based on tree_type

Currently, CHROMA_REF_INFO::is_chroma_ref does not differentiate based
on the partition tree type - it is set based on the assumption on the
current partition type is SHARED_PART. This commit explicitly set
is_chroma_ref to 0 on LUMA_TREE, and 1 to CHROMA_TREE.

This change does not affect the bitstream syntax, as the chroma
predictors check both is_chroma_ref and tree_type. However, this affects
some encoder-side optimizations (more specifically a partition tree
reuse feature), which causes a small difference in encoding output.

| CONFIG | PSNR_YUV | Enc Time | Dec Time |
| ------ | -------- | -------- | -------- |
|   AI   |  +0.02%  |    97%   |   100%   |
|   RA   |  +0.00%  |    99%   |    99%   |

STATS_CHANGED