tree db9c07b65efe9564df1eea24521f8a3d1d772cbf
parent 0a480f2ad7c3a80c6c941c14500e00ebb80a9ac2
author yjshen <yjshen@google.com> 1583804913 -0700
committer Damon Shen <yjshen@google.com> 1584037557 +0000

Free plane-wise filtering from estimated weights.

Plane-wise temporal filtering strategy is actually independent from the
filtering weight estimation used in YUV strategy. However, the current
code makes an early return if the estimated weights are 0 no matter what
filtering strategy is being used.

This CL fixes this bug by only making early return when using YUV
strategy. Only midres and hdres are affected since plane-wise strategy
is only applied to high resolution videos.

Experimental resutls:

Under Speed-4 (two-pass mode):
           avg PSNR   ovr PSNR     SSIM
midres        0.006     -0.054   -0.045
midres2       0.016      0.044    0.104
hdres        -0.008     -0.044   -0.033
hdres2        0.026     -0.021    0.037

Under Speed-1 (two-pass mode):
           avg PSNR   ovr PSNR     SSIM
midres        0.008     -0.106   -0.062
midres2      -0.021     -0.049   -0.008
hdres        -0.041     -0.046   -0.032
hdres2       -0.040     -0.079   -0.007

STATS_CHANGED

Change-Id: Ifb5ce0a53fa6a9b634bf810d9d5f9b2dcc6a4ee4