commit 392d0ff726ce9fdf825b61a9b9b776b9448b5a87
author Ryan Lei <ryan.z.lei@intel.com> Thu Feb 09 13:05:42 2017 -0800
committer Ryan Lei <ryan.z.lei@intel.com> Wed Mar 01 19:59:33 2017 +0000
tree bcd61e57047b4899f448c5a1c6e9a6d7d5ed9515
parent ab77e73b77571ebed608708465a1b1d4b848e5a6

implement combined parallel_deblocking experiment

The parallel_deblocking experiment is proposed jointly by Intel
and Microsoft. The following changes are implemented in this
experiment:

- deblocking filter order is changed to filter all vertical edges
  of the whole frame followed by filtering all horizontal edges
  of the whole frame

- filter length decision is made based on the transform block size
  on both sides of the edge. block with smaller transform size
  determines the final filter length.

- transform blocks on both sides of the edge are checked, only when
  both blocks are skipped and they belong to the same prediction
  block, filtering of that edge can be skipped.

- 15-tap filter and extended flat area detection are removed.

- special rule for handling 4x4 transform block on the super block
  boundary in VP9 is removed.

Change-Id: I1aa82c6b5335d47c2f73eec8fc8bee2c08a1cf74