Change-Id: Ia2aa7558f9f53da7dff970b30fe0a94958159ffb

Includes various cosmetic changes and refactoring including
naming the sharp filters differently (since they are no longer
8-tap).

Change-Id: Ida5a19ca0daa9f6a64a6734394c685b2a4a2564a

The interintra experiment, which combines an inter prediction and an
inter prediction have been ported from the nextgen branch. The
experiment is merged into ext_inter, so there is no separate configure
option to enable it.

Change-Id: I0cc20cefd29e9b77ab7bbbb709abc11512320325

Adds hooks to use 32x32 ext-tx. Also adds scan orders for the masked
transforms for 32x32.
Make macro USE_MSKTX_FOR_32X32 1 in blockd.h to support 32x32 masked
transforms for ext-tx.

Change-Id: Ie6564830266651fcafae2d536c274dafd664ce17

Change-Id: I51307a217eeba14dbdaa2522be474530316a4faa

In this experiment, an obmc inter prediction mode is enabled for
>= 8X8 inter blocks. When the obmc flag is on, the regular block-
based motion compensation will be refined by using predictors of
the above and left blocks.
Fixed some compatibility issues with vp9_highbitdepth, supertx,
ref_mv, and ext_interp.

Coding gain (%) on derflr/hevcmr/hevchd
OBMC:
1.047/1.022/0.708
OBMC + SUPERTX:
1.652/1.616/1.137
SUPERTX:
0.862/0.779/0.630

Change-Id: I5d8d3c4729c6d3ccb03ec7034563107893103b7f

Setting FIXED_TX_TYPE as 1 makes the encoder skip tx_type search,
about twice as fast.

This speed feature is off by defualt; we can turn it on when we
want to quickly test new ideas.

Change-Id: Ieab5807d17fcd54fce3e8ae2f59a18b42eb79408

Seperate the prediction angle search and fitler search.
It can reduce the computation overhead of filter search by as much
as 85%, while keeping more than 50% of the coding gain.

Change-Id: Id152f71e20ebcaca8b429bdd4ca1fbeb646fc6bf

BD-rate performance improvement (on top of ext-intra):
derflr  0.22%
hevclr  0.36%
hevcmr  0.48%
hevchr  0.37%
stdhd   0.19%

Average speed impact on some derf clips is about 40% slower (on
top of ext-intra). Speed improvment is a to-do.

Change-Id: I8fe3fe8c5e4f60d0462778adbcc15c84dfbe7a25

This commit allows an adaptive motion vector referencing mode
approach. It checks the available reference motion vector candidate
list and decides the amount of motion vector referencing modes. The
current implementation assumes simple binary coding for the syntax.

The compression performance is improved by
derf   0.11%
hevcmr 0.38%
stdhd  0.09%
hevchr 0.23%

The coding gains due to the new reference motion vector system are
derf   1.0%
hevcmr 1.7%
stdhd  1.4%
hevchr 1.3%

Change-Id: Idf932fc373546fe59c8741f1b933ff656e8dbc3f

The loop filter relies on inter_tx_size in MB_MODE_INFO being set
properly when VAR_TX is enabled. Supertx coded blocks did not set this
previously at all, and the differing garbage values eventually resulted
in in a YUV mismatch between encoder and decoder after loop filtering.

This patch fixes this by setting inter_tx_size to the proper supertx
size in both the encoder and the decoder. This should also mean that
loop filtering is done at the proper transform boundaries, even when
supertx or vartx is being used.

Change-Id: I41a564cd6d34ce4a8313ad4efa89d905f5ead731

Combinations of different mv modes for two reference frames
are allowed in compound inter modes. 9 options are enabled,
including NEAREST_NEARESTMV, NEAREST_NEARMV, NEAR_NEARESTMV,
NEAREST_NEWMV, NEW_NEARESTMV, NEAR_NEWMV, NEW_NEARMV, ZERO_ZEROMV,
and NEW_NEWMV.
This experiment is mostly deported from the nextgen branch.
It is made compatible with other experiments

Coding gain of EXT_INTER(derflr/hevcmr/hevchd): 0.533%/0.728%/0.639%

Change-Id: Id47e97284e6481b186870afbad33204b7a33dbb0

NEW2MV is enabled, representing a new motion vector predicted from
NEARMV. It is mostly ported from nextgen, where it was named
NEW_INTER.
A few fixes are done for sub8x8 RDO to correct some misused
mv references in the original patch.
A 'bug-fix' for encoding complexity is done, reducing the additional
encoding time from 50% to 20%. In sub8x8 case, the old patch
did motion search for every interpolation filter (vp9 only
searches once). This fix also slightly improves the coding gain.
This experiment has been made compatible with REF_MV and EXT_REFS.

Coding gain (derflr/hevcmr/hevchd): 0.267%/0.542%/0.257%

Change-Id: I9a94c5f292e7454492a877f65072e8aedba087d4

Fixes a breakage introduced with the latest merge from master and
cleans up a couple of compiler warnings.

Change-Id: Ia55b39ba78e43f6fe52c54d7f34faa4dd6bbbf26

This commit allows the codec to add motion vector pairs into
the candidate list. It further improves the compression performance
by 0.1% across derf, hevcmr, stdhd, and hevchr sets without adding
encode/decode time.

Change-Id: I88d36da25a2a89bb506d411844af667081eba98b

This commit re-works the reference motion vector stack process
and make it support extended context set. It unifies reference
motion vector checking process for row and column scan, as well as
for single block scan.

Change-Id: I68c05cde93cf8b0ca2ef4d1523399f405bd0a337

Also includes a bug fix.

Change-Id: Ia49ed00f8ffd1531c10bcf89b1f497310ee7cb82

The nominal tx_type for a given mode is used as a context
to encode the actual tx_type for intra.

Results:
derflr: -0.241% BDRATE
hevcmr: -0.366% BDRATE

Change-Id: Icfe7b0a58d79bc6497a06e3441779afec6e01e21

Various additional changes were made to make the experiment
compatible with misc_fixes.

derflr: +0.979%
hevcmr: +0.865%

Speed-wise with --enable-supertx the encoder is only about 10%
slower than without. Decoding impact is about 30% slowdown.

Note this does not work with ext-tx or var-tx yet. That is
a TODO.

Change-Id: If25af4241a7a9efbd28f58eda3c4f044c7a7ef4b

For the experiment of EXT_REFS, removed the previous special handling
on the new last 3 references, i.e. LAST2_FRAME, LAST3_FRAME, and
LAST4_FRAME, at the decoder, so that these new last references are
treated the same way as the other 3 references (LAST_FRAME,
GOLDEN_FRAME, and ALTREF_FRAME). Encoder changes have been made
accordingly to realize this flexibility.

Change-Id: Ic6546f9443b4377bb7e7b101bfa3e70a8b8d1c65

This commit allows the codec to analyze the reference motion vector
candidate list and adaptively reduce the size of inter prediction
mode set.

Change-Id: Ied6a403843b860d66f26ed485c1825c05c71bdfc

This commit re-works the entropy coding scheme of the motion
compensated prediction modes. It allows more flexible hyperplane
partition for precise classification.

Change-Id: Iba5035c76691946cf1386b6c495e399c3d9c8fc5

It was removed by the master branch merge.

Change-Id: I4b2a524c9e052e41063359afcb4ba22bf78344cf

1) Add facade to quantize b/fp/dc version so that their interface
   are the same.
2) Merge vp10_xform_quant b/fp/dc version to one function so that
   the code flow in encodemb.c is clear

Change-Id: Ib62d6215438fc2d07f4e7e72393f964832d6746f

Store it in nextgenv2 for now.

Change-Id: Iab0af0e15246758e3b6e8bde4a74b13c410576fc

Estimate angle histogram using gradient analysis, then skip those
angles that are unlikely to be chosen.

On ext-intra experiment, turning off filter-intra modes:
for all-key-frame setting, computation overhead is reduced
by about 40%, coding gain dropped from +2.08% to +1.96% (derflr);
with kf-max-dist=150, computation overhead is reduced
by about 60%, coding gain dropped from +0.58% to +0.49% (derflr).

Change-Id: I36687410fb10561b8e1a8eebb1528cf17755bd5b

This commit ports the motion vector stack from motion field
analyzer to the encoding and decoding pipeline.

Change-Id: Ie283c1e1a15b4c17a1c7c175ce322bf053bb7840

Reduces the transform optons for INTRA as well as INTER when
transform size is 16x16 to not use any of the DSTs.
Thus, a total of 10 options are used for 16x16, while 4x4
and 8x8 still uses 17 options.

derflr/hevchd actually improves a little, while hevcmr drops
a little.

About 10% speed improvement.

Change-Id: I920a182231e052cdd622f8bb67085c16c572cb1e

These primitive variables are commonly required by many other
experiments as well. The use of n4_w and n4_h was originally
introduced in the vp9 decoder implementation.

Change-Id: I93d701d891e3860f31150031e3b9a2b29a3993d2

Under the experiment of EXT_REFS: LAST2_FRAME, LAST3_FRAME, and
LAST4_FRAME.

Coding efficiency: derflr +1.601%; hevchr +1.895%
Speed: Encoder slowed down by ~75%

Change-Id: Ifeee5f049c2c1f7cb29bc897622ef88897082ecf

Coding gain on derflr drops to +1.83%.

Change-Id: If68c429f09422a70513d9f1e8e36e10c928e034a

Remove MISC_FIXES flags except for the changes on MV precision, which
has a 0.1% performance drop.

On derflr, the impact is -0.012%.

Change-Id: I0a74e5a212dd0cb827192a318c92a714c9681e45

Coding gain remains about the same, while overall speed is
substantially increased.

Change-Id: I2989bebcfd21092cd6a02653d4df4a3bf6780874

Javan Whistling Duck release.

Change-Id: If44c9ca16a8188b68759325fbacc771365cb4af8

Adds a new interpolation experiment.

Improves entropy coding to send the filter type only if
the motion vectors have subpel components.
Adds one new 8-tap smooth filter, and tweaks the others.

derflr: +0.695%
hevcmr: +0.305%

About 5% encode slowdown. No visible impact for decoding.

Also makes the interpolation framework flexible to support both
strictly interpolating filters as well as non-interpolating
filters that filter integer offsets. This is mainly for
further experimentation and if not found useful the code will
be removed.

Change-Id: I8db9cde56ca916be771fe54a130d608bf10786e6

Currently there are two parts in this experiment: extra directional intra
prediction modes and the filter intra modes migrated from the nextgen branch.

Several macros are defined in "blockd.h" to provide controls of the experiment
settings. Setting "DR_ONLY" as 1 (default is 0) means we only use directional
modes, and skip the filter-intra modes; "EXT_INTRA_ANGLES" (default is 128)
defines the number of different angles we want to support; setting
"ANGLE_FAST_SEARCH" as 1 (default is 1) means we use fast sub-optimal search
for the best prediction angle, instead of exhaustive search. The fast search
is about 6 times faster than the exhaustive search, while preserving about
60% of the coding gains.

With extra directional prediction modes (fast search), we observe the following
code gains (number in parentheses is for all-key-frame setting):
derflr +0.42%  (+1.79%)
hevclr +0.78%  (+2.19%)
hevcmr +1.20%  (+3.49%)
stdhd  +0.56%
Speed-wise, about 110% slower for key frames, and 30% slower overall.

The gains of filter intra modes mostly add up with the gains of directional
modes. The overall coding gain of this experiment:
derflr +0.94%
hevclr +1.46%
hevcmr +1.94%
stdhd  +1.58%

Change-Id: Ida9ad00cdb33aff422d06eb42b4f4e5f25df8a2a

This commit hooks up the rate-distortion optimization system to
fully exploit recursive transform block partition and multiple
transform type. The compression performance of the two experiments
largely adds up. For derf set, ext-tx provides additional 2.1%
coding gains on top of the gains due to recursive transform block
partition (0.69%).

Change-Id: I1091fb9545f74e489a6a2489dc3c12f5abd05043

If a block has all coefficients quantized to zero, the codec will
assume that it uses largest transform block size.

Change-Id: Icd4e8e7cdc4b6af6974f87169e50b040ebfe9020

This commit enables the entropy coding of the recursive transform
block partition syntax.

Change-Id: I0c2509fb7b9822d12a721f9ebf9327fac83c777e

Allows inter and intra tx_types to have different sets of
transforms for different tx_size/sb_type combinations.

Change-Id: Ic0ac1daef7a9fb15c4210271e4d04cd36e5cec8e