Merge sb32x32 and sb64x64 functions; allow for rectangular sizes. Code
gives identical encoder results before and after. There are a few
macros for rectangular block sizes under the sbsegment experiment; this
experiment is not yet functional and should not yet be used.

Change-Id: I71f93b5d2a1596e99a6f01f29c3f0a456694d728

Change-Id: I40524170334109e2864b06e3c73c8b34e5aa8b0f

0.15% quality increase on derf, particularly noticeable on hard clips
at the higher bitrate end.

Change-Id: I02415a96eb9bbc361cba923069625fae71844bc9

* changes:
  Move EOB to per-plane data
  Move qcoeff, dqcoeff from BLOCKD to per-plane data

This is a VP8-only feature (part of profile 3) that is unsupported in
VP9.

Change-Id: I78016eede8d9c834d44d4c517f3e8b8fc2a378b1

Change-Id: If7fa8aea02f26c2c2bb5daf4e65c3e661d7031ca

Change-Id: Ic219e7878428128e4bb1b3995e8151f92b6bd9c3

It is never used.

Change-Id: If7462357c0498ed05af2645f0c272124381d3aab

Change-Id: Icd6b4322841fefcc86f06645e6aaf1ea42fdfabd

It is never used.

Change-Id: Ibae898c52c766aabf65868611060f9c38fb85b35

Cleaning up the code, removing unused vp9_check_segref_inter function and
useless comments.

Change-Id: Ia0e1a3878dc0f9789cba84aeb507a83d9dccd26b

Change-Id: Id0c2e44daa936f1d6fb76469fd1bd72a4d7c19fd

Continue migrating data from BLOCKD/MACROBLOCKD to the per-plane
structures.

Change-Id: Ibbfa68d6da438d32dcbe8df68245ee28b0a2fa2c

Start grouping data per-plane, as part of refactoring to support
additional planes, and chroma planes with other-than 4:2:0
subsampling.

Change-Id: Idb76a0e23ab239180c818025bae1f36f1608bb23

so it is configurable to faciliate testings

Change-Id: I247b62736c3a08ec2934793959d1ae605a05efa3

Adds back special casing B_PRED mode decoding but protected
within the experimental macro.

Change-Id: If98dc8e56b0ecfb1202540c2b7dfdd070cb81ca0

Change-Id: I3a1e9cc5c3ed5be01ff75a84a6c82ec02c75af9c

Fixes an indexing bug. Looks like the bug has been there for a while.

Change-Id: I9fc04b0c30754bcb47366ad94a08112925600c4d

Inside decode_sb_4x4 it should be
"get_tx_type_4x4(mb, y_idx * y_size + x_idx)"
but it was
"get_tx_type_4x4(mb, y_idx * (2 * y_size) + x_idx)".
Also making code of decode_sb_4x4, decode_sb_8x8, and decode_sb_16x16
formatted in the same way.

Change-Id: I15c7bef4fb575f7e9da19f953912324cb35d24dd

This function expects real Q values as inputs
not index values.

The use-age her impacts the Q chosen for force key
frames. Though this is a bug fix I have not yet verified
whether following the bug fix the q multiplier value used is
correct.

Change-Id: I49f6da894d90baeb1e86c820c335f02dc80d3b66

Making code more readable in different places.

Change-Id: Iea92c9a35e64d257ee358879fc04fc926843d52e

Moving command code from decode_sb32 and decode_sb64 into new
decode_sb_16x16 function.

Change-Id: I57a161300af085557adec2fe600f3c10a145faf2

Better formatting, shorter code, adding read_switchable_filter_type
function.

Change-Id: Ib919b529385cae34c2d682b1c3093518b6942fc1