tree e529a32ce40f4b64705171f32d47866c580de136
parent 2e6b85e5d7d87fc2f4b4b04e55f5108604d676db
author Mudassir Galagnath <mudassir.galaganath@ittiam.com> 1636531830 +0530
committer Chi Yo Tsai <chiyotsai@google.com> 1637693463 +0000

Allintra: Introduce adapt_top_model_rd_count_using_neighbors sf

The sf top_intra_model_count_allowed indicates the number of top
model rds to be stored during intra mode decision and these stored
model rds are used to prune the luma intra modes. This CL
introduces aggressive pruning of modes by reducing the number of
candidates used to store the model rd and by adapting the index of
the candidate for pruning based on neighbor blocks and quantizer
information. This change is applicable for speed >= 6.

For AVIF still-image encode,

          Instruction Count   BD-Rate Loss(%)
cpu-used     Reduction(%)     psnr       ssim
    6           5.481         0.0222    -0.0281
    7           4.170         0.2591     0.2361
    8           2.437         0.1108     0.1157
    9           0.000         0.0000     0.0000

STATS_CHANGED

Change-Id: Ib1bf8cae2f78c640c387050e6a2d4dfb988e742e