tree 940c74c038d54dbdc7763417182a8eaeb8e72d63
parent 9333b31e7ad06721177cc393d019e9d6f20dbc99
author Debargha Mukherjee <debargha@google.com> 1543274105 -0800
committer Debargha Mukherjee <debargha@google.com> 1543450618 +0000

Determine denom automatically in superes mode 3

The maximum superres denominator is determined now
based on frequency analysis. Use of superresolution
now starts from the thresholds specified in qthresh mode
and up to the maximum level determined by the analysis.

With --superres-mode=3 --superres-kf-qthresh=48 in single
frame (image coding) test:
hdres: -0.690% PSNR, -0.871% SSIM.
midres: +0.006% PSNR, -0.508% SSIM.

Change-Id: Ib88376b39079bcc6e22f0b3048232e47462bbf8e