tree 9cd6207f453335f7c700a1d36735aee8b3832929
parent 6275c4e150e822ae7d0c6c4d753f07f544156f1b
author Jayasanker J <jayasanker.j@ittiam.com> 1623909508 +0530
committer Wan-Teh Chang <wtc@google.com> 1625865911 +0000

Introduce early_term_luma_palette_size_search speed feature

The sf early_term_luma_palette_size_search is introduced to
terminate rd evaluation of luma palette_size based on the
available header/mode cost information for coarse palette_size
search when prune_palette_search_level = 1. This sf is enabled
for speeds 1 and 2 in allintra encoding mode.

For allintra video encode (on screen content set),

          Instruction Count        BD-Rate Loss(%)
cpu-used     Reduction(%)   avg.psnr  ovr.psnr    ssim
   1           1.069        0.0037    0.0036      0.0089
   2           2.765        0.0096    0.0091      0.0016

For AVIF still image encode,

          Instruction Count    BD-Rate Loss(%)
cpu-used     Reduction(%)      psnr       ssim
   1           1.134           0.0014     0.0002
   2           1.291           0.0012     0.0002

BUG=aomedia:2959

STATS_CHANGED

Change-Id: I2d696b5e58ee38867e50acf48a235cb9a54d972f