commit 6be4a54b891279162c8f5035efa006467b756b94
author Urvang Joshi <urvang@google.com> Thu Nov 03 15:24:05 2016 -0700
committer Urvang Joshi <urvang@google.com> Mon Nov 28 12:12:26 2016 -0800
tree 2fb47d0adbb48fa01b68042ae778a7361547c420
parent 862c1e5d0d321fb5932b8bc985327a67117c1ac6

Add a new intra prediction mode "smooth".

This is added as part of ALT_INTRA experiment.

This uses interpolation between top row and estimated bottom row; as
well as left column and estimated right column to generate the
predicted block.The interpolation is done using a predefined weight
array.

Based on experiments, the currently chosen weight array was created
to represent a quadratic curve, but can be tuned further if needed.

Improvement from baseline on Derf set:
ALL Keyframes: 1.279%

Improvement from existing ALT_INTRA:
ALL Keyframes: 1.146%

Change-Id: I12637fa1b91bd836f1c59b27d6caee2004acbdd4