Change-Id: I22aa803ffff330622cdb77277e7b196a9766f882

Results: derf (vanilla or +hybridtx) +0.2% and (+hybrid16x16
or +tx16x16) +0.7%-0.8%; HD (vanilla or +hybridtx) +0.1-0.2%
and (+hybrid16x16 or +tx16x16) +1.4%, STD/HD (vanilla or +hybridtx)
about even, and (+hybrid16x16 or +tx16x16) +0.8-1.0%.

Change-Id: I03899e2f7a64e725a863f32e55366035ba77aa62

Separates the entropy coding context models for 4x4, 8x8 and 16x16
ADST variants.

There is a small improvement for HD (hd/std-hd) by about 0.1-0.2%.
Results on derf/yt are about the same, probably because there is not
enough statistics.

Results may improve somewhat once the initial probability tables are
updated for the hybrid transforms which is coming soon.

Change-Id: Ic7c0c62dacc68ef551054fdb575be8b8507d32a8

With this change, even if hybridtransform8x8 experiment is off,
8x8 dct is used for the I8x8 mode. However note that the gains
observed with the hybridtransform8x8 experiment will now be less,
since part of the gain is now merged in.

Change-Id: I9afb3880906fd0a1368a374041fc08efcf060c54

Removed spurious line that has no effect.

Change-Id: I9dc90babbbfcaca049d4a40dc996edc7de123e01

Some cleanups on the transform size and type selection logic.

Change-Id: If2e9675459482242cf83b4f7de7634505e3f6dac

This commit merges those parts of the CONFIG_NEW_MVREF
that specifically relate to choosing a better set of candidate
MV references into the NEWBESTREFMV experiment.

CONFIG_NEW_MVREF will then be used for changes relating
to the explicit coding of a cost optimized MV reference in the
bitstream as part of MV coding.

Change-Id: Ied982c0ad72093eab29e38b8cd74d5c3d7458b10

Extend experiment to use both vectors from MBs
coded using compound prediction as candidates.

In final sort only consider best 4 candidates
for now but make sure 0,0 is always one of them.

Other minor changes to new MV reference code.
Pass in Mv list to vp8_find_best_ref_mvs().

Change-Id: Ib96220c33c6b80bd1d5e0fbe8b68121be7997095

Adds a new experiment with redesigned/refactored motion vector entropy
coding. The patch also takes a first step towards separating the
integer and fractional pel components of a MV. However the fractional
pel encoding still depends on the integer pel part and so they are
not fully independent. Further experiments are in progress to see
how much they can be decoupled without affecting performance.
All components including entropy coding/decoding, costing for MV
search, forward updates and backward updates to probability tables,
have been implemented.

Results so far:
derf: +0.19%
std-hd: +0.28%
yt: +0.80%
hd: +1.15%

Patch: Simplifies the fractional pel models:
derf: +0.284%
std-hd: +0.289%
yt: +0.849%
hd: +1.254%

Patch: Some changes in the models, rebased.
derf: +0.330%
std-hd: +0.306%
yt: +0.816%
hd: +1.225%

Change-Id: I646b3c48f3587f4cc909639b78c3798da6402678

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

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: 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

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

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

Change-Id: Ia1e3b0ff9b70747b3725391de59f230edab767d7

Change-Id: Ib7b972486ccbbcb82fa4c05a5f6d7f8aaec32155