tree effb630b3229f2aff8743183d5aabd9c5c977db3
parent b17e0a6c97ff98100b71665837a2d34d22f338b8
author Sarah Parker <sarahparker@google.com> 1547766275 -0800
committer Sarah Parker <sarahparker@google.com> 1548188969 +0000

Add improvements to the b quantizer

These are controlled by a macro because they do not currently have
SIMD.

Lowres Compression Gains:
Full Trellis Optimization: 0.02% PSNR Gain
Partial Trellis (disabled in tx search): 0.38% PSNR Gain
Trellis Fully Disabled: 0.68% PSNR Gain

Change-Id: I5a42e6ff9fcca3dc31691c14deb1f0599a0ff894