Moves all post encode rate control updates to a separate function
plus other cleanups.

Change-Id: I70e8eccf666c88d8b649b969997fd84d27e4baaa

Renaming treed_read() to consistent vp9_read_tree() and moving it from
deleted vp9_treereader.h to vp9_dboolhuff.h file.

Change-Id: Iedd8655acbe25e4fcf62b79e5a13bdea69b6b004

Added the test vector provided by Attila, which caught the bug in
Issue 661 "Decoder produces mismatched outputs with ssse3 enabled
and disabled"

vp90-hantro-stream-001.ivf
size: 320x180; 20 frames

Change-Id: Ic0d2b57ac7596ecb938dd55abc8c706fc2dd6d8f

Multiply by 3 was on 8bit vectors when it should have been on
16bit vectors.

Change-Id: I248c1429b3134dfd171dfab0ebb109fd2437e1fc

Change-Id: Ibc61ef81fafeb20df6df6e5496b6c01760f3dc84

Change-Id: Ic318be9d74a95793abc41501fe563164de53a6d7

Removes the active_worst_qchanged variable since it is never
set to 1.

Change-Id: I29a291fd1068fd9b504a2db7768d45644c1eae3e

Moved arrays:
  vp9_mv_joint_encodings
  vp9_mv_class_encodings
  vp9_mv_class0_encodings
  vp9_mv_fp_encodings

Change-Id: Iaf5008c579fcbd6d77fdd81d1aef8c71b5f308b7

Renaming vp9_init_mode_costs() to fill_mode_costs() and moving it to
vp9_rdopt.c.

Change-Id: Ib2542d216458f6dced9f4b7ccbdd2cd98176aa5a

- Add command line args that allow display of warnings without prompting
  for user input.
- Extend warning code to make it somewhat scalable.

Change-Id: I2bad8f9315f6eed120c2e1bbe0a2a5ede15fbf35

Change-Id: Ib273dfff3be284f3c9ae288e5315fb6c6126f9c2

Change-Id: I31c3908ba394095deb5d3a5d7b7c9b2b5328c3e8

The idea here is to allow "in frame" adjustment of the final Q
value used to encode each SB64, using segmentation.

There is also adjustment of the rd mult in regions of overspend.

Activated using aq_mode=2

Change-Id: I2f140cd898c9f877c32cd6d2e667f5e11ada4b1c

The decoder will construct inter predictor using lazy border extension,
while the encoder, going with multiple runs of motion search in the rate-
distortion optimization loop for each block, does border extension at
frame level. This commit makes separate the inter predictors for encoder
and decoder, respectively.

Change-Id: Ieca2fecba3a7201a6d64ef9f219e5d91e50559c3

Change-Id: Ic8fc16ee1734cfde0d12a2e3abb3e9299382f3b1

Change-Id: I9af38f1a0e226ee094c17081f044a722ac1caded

This function is also used with the U and V planes.

Change-Id: Ib6beae0438790bfb690b3a2bda9c5c8b0e89a9b8