Enable ADST/DCT of dimension 16x16 for I16X16 modes. This change provides
benefits mostly for hd sequences.

Set up the framework for selectable transform dimension.

Also allowing quantization parameter threshold to control the use
of hybrid transform (This is currently disabled by setting threshold
always above the quantization parameter. Adaptive thresholding can
be built upon this, which will further improve the coding performance.)

The coding performance gains (with respect to the codec that has all
other configuration settings turned on) are

derf:   0.013
yt:     0.086
hd:     0.198
std-hd: 0.501

Change-Id: Ibb4263a61fc74e0b3c345f54d73e8c73552bf926

Change-Id: I7524883fb29f42303fb46a5bc6772fbcf8781d1d

Change-Id: I323c429b453eec8c3b76c37f7e2a52da9dfe8d77

Change-Id: I3d585bae446c16fcf7a39d72c1bcd6468a7bb1a1

Alternative strategy for finding a list of candidate motion
vectors to use as reference values in mv coding and as
nearest and near.

Sort by sad in vp8_find_best_ref_mvs() rather than just
pick the best. Allow 0,0 as a best ref option but not a
nearest or near unless there are no alternatives.

Encode/Decode verified on at least some clips.

Some commented out experimental and stats code still in place.

Gain over existing code averages about 1% on derf (alll metrics)
with improvement on all clips. Other test results pending.

The entropy coding of the mode (nearest/near etc) still
depends upon and requires the old "findnear" code so
this needs looking at and may provide room for further gains.

Change-Id: I871d7cba1d1c379c4bad9bcccce1fb19c46b8247

Change-Id: I887cdcf90b87736f2a3805420aa41eed93324bee

Change-Id: I99311811820169d62fda3febac4bafacfc7a538b

This is being reimplemented more generically in terms of affine
transforms.

Change-Id: I9300bfde5f8b93c708c64f59427087720f8ed782

corrected ifdefs to include CONFIG_HYBRIDTRANSFORM8X8 for missing
definitions

Change-Id: I96cd08c98d74b5ba10866f3fa30252073ce92fa5

Change-Id: Iccb56e3b966d1519ba49dfe4e1396479c6b54a6f

Change-Id: I95217ce52675ad00637fc8f60d4d0dd054efd512

This commit adds a pick_sb_mode() function which selects the best 32x32
superblock coding mode. Then it selects the best per-MB modes, compares
the two and encodes that in the bitstream.

The bitstream coding is rather simplistic right now. At the SB level,
we code a bit to indicate whether this block uses SB-coding (32x32
prediction) or MB-coding (anything else), and then we follow with the
actual modes. This could and should be modified in the future, but is
omitted from this commit because it will likely involve reorganizing
much more code rather than just adding SB coding, so it's better to let
that be judged on its own merits.

Gains on derf: about even, YT/HD: +0.75%, STD/HD: +1.5%.

Change-Id: Iae313a7cbd8f75b3c66d04a68b991cb096eaaba6

Change-Id: I01dd96da18fe22450bb372b10ba90eab52e29bdf

Error was introduced in bf474e17

Change-Id: I55bf114a1938c3a8869d8ff49cbe076eb9e83ea0

This caused spurious crashes on encodes, frustratingly often only on
high-definition material.

Change-Id: Ia8c1dfc420d598ca92108bd9cc2df7450e8d10a2

Change-Id: I1ccb2546e29803d0e9d69282409d549a28201967

Further cases of inconsistent naming convention.

Change-Id: Id3411ecec6f01a4c889268a00f0c9fd5a92ea143

Change-Id: I27729a8631cffd54dfbae3ec0f07df7c883f7510

Change-Id: I9c7ef4a75c37aa0e10df75e165e3066614c955ef

The reference motion vector selected by surrounding pixels that has
the best matching score is used as nearest motion vector.

The change has shown consistent gain on all test sets, compression
gains range from .2% to .6%. The variation is largely dependent on
various other experiments on or off.

Change-Id: I5552e1c2f6fc57c3e8818a5ee41ffda89af05e75

References to MACROBLOCKD that use "x" changed to "xd"
to comply with convention elsewhere that x = MACROBLOCK
and xd = MACROBLOCKD.

Simplify some repeat references using local variables.

Change-Id: I0ba2e79536add08140a6c8b19698fcf5077246bc

Also add warnings for undefined macros in the C pre-processor

Change-Id: I1ec30e57c5a49fb72151a4cf140d7eeb0fb1d779

Change-Id: I8548aebd3c39797b253eef472bfe1c40f2f7ec59

Change-Id: Icc276609e409e4e234d240e5c12e137600e178ed

The 16x16 has not been done yet for speed reasons.

Change-Id: I066e369a065674d58986e937344c9303fed19450

The commit also corrects unit of encoding from microsecond to
milisecond.

Change-Id: I030108e90f89f33dfad2d092dc8991db81979715

Change-Id: Ie7e7727512cc1333bd16e7688cd1d8764371dde3

Change-Id: I8e72279cc68f34d269705f06cdaf8f3d06eed635

Change-Id: Id38baf1b89648ef534e28be72f583137871f920c

Add local variable in several places to reference the MB mode
info structure. Currently this is usually accessed in the code as
x->e_mbd.mode_info_context->mbmi.* or in some places
xd->mode_info_context->mbmi.*

Resolved some uses of x-> for the MACROBLOCKD structure.

Rebased without dependency on motion reference experiment.

Change-Id: If6718276ee4f2ef131825d1524dfdb02a3793aed

Change-Id: I4fceefe76b14bd38a358dc4356708f7981bab339

This should make merging inter code paths easier.

Change-Id: I5cb81f25d56fa4790b4e9cfa4bc32b9062c2cfdf

SPLITMV shares very little code with the other inter modes.

Change-Id: I0beee95de1fbedeea1f71650951ffc7db3a118eb

Also refactor some RD code, remove some comments, and cosmetic changes.

Change-Id: I43806ae573ab5a5036602ac4425d750bbfa1e812

Merges this experiment in to make it easier to run tests on
filter precision, vectorized implementation etc.

Also removes an experimental filter.

Change-Id: I1e8706bb6d4fc469815123939e9c6e0b5ae945cd

Change-Id: I94f08f2cfb37d11d71050dca3200f1d391269a6a

Change-Id: Ic7a7cb1199b085e98ede0e634619b3077c348d57

Change-Id: I2f96e5b205f70fdb559f01637c4b5730246c38a8

It's now used in more places

Change-Id: I63f8e1d827404e0b4f203bdb1df361e565d0779d

Change-Id: I7803d719ead238189e75c52701c3bb6c1552f4b5