tree 3f09ce46838d143b0fa6c2129fde9efce56a8f49
parent e0e0a4551711117b509ce1c2b507a75a02258648
author venkat sanampudi <sanampudi.venkatarao@ittiam.com> 1624003546 +0530
committer Wan-Teh Chang <wtc@google.com> 1624638587 +0000

Introduce early_term_chroma_palette_size_search speed feature

The sf early_term_chroma_palette_size_search is introduced to
terminate rd evaluation of chroma palette_size based on the available
header/mode cost information in av1_rd_pick_palette_intra_sbuv().
If header cost corresponds to lower palette_size is more than the
best_rd, further palette_size search is terminated.
The sf is enabled for all speeds in allintra encoding mode and
for speed 6 in good encoding mode.

For allintra video encode (on screen content set),

          Instruction Count                 BD-Rate Loss(%)
cpu-used     Reduction(%)   avg.psnr  avg.psnrCb  avg.psnrCr  ssim
   0           0.450       -0.0001    0.0057      0.0086      0.0003
   1           0.616       -0.0003    0.0015      0.0013     -0.0011
   2           1.730        0.0006    0.0044      0.0023     -0.0005
   3           2.498        0.0028    0.0078      0.0093      0.0023
   4           2.890        0.0014    0.0055      0.0070      0.0014
   5           3.093        0.0006    0.0115      0.0105      0.0022
   6           3.865        0.0003    0.0046      0.0034     -0.0040

For AVIF still image encode,

          Instruction Count               BD-Rate Loss(%)
cpu-used     Reduction(%)    psnr      avg.psnrCb  avg.psnrCr  ssim
   0           0.447         0.0000    0.0000      0.0000      0.0000
   1           0.810         0.0000    0.0000      0.0000      0.0000
   2           0.855         0.0000    0.0000      0.0000      0.0000
   3           1.050         0.0000    0.0000      0.0000      0.0000
   4           1.452         0.0000    0.0000      0.0000      0.0000
   5           1.667         0.0000    0.0004      0.0011      0.0000
   6           1.949        -0.0001   -0.0004      0.0002     -0.0002

BUG=aomedia:2959

STATS_CHANGED

Change-Id: Idd0a2f021d05bde40e0b49daf2eb2922a88cf26c