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Recently, sub8x8 inter mode decition functions have been
removed from the av1 codebase, so codebase does not allow
disabling cb4x4 anymore.

This makes pvq not working simply crashing
because we had disabled cb4x4 if pvq is enabled.
Hence, pvq has been fixed for cb4x4.

Also, if pvq is enabled, disable lgt and highbitdepth in the configure.

Change-Id: I2cb675c0dbc12bce60ed6a66c34ea3e907cc35b3

(1) Work with var-refs to remove redundant bits in ref frame
    coding;
(2) Add a new uni-directional compound reference pair:
    (LAST_FRAME, LAST3_FRAME);
(3) Redesign the contexts for encoding uni-directional reference frame
    pairs;
(4) Use aom_entropy_optimizer to collect stats for all the default
    probability setups related to the coding of reference frames.

Compared against the baseline (default enabled tools excluding ext-tx
and global-motion for encoder speed concern) with one-sided-compound,
the coding gain of ext-comp-refs + var-refs - one-sided-compound is:

lowres: avg_psnr -0.385%; ovr_psnr -0.378% ssim -0.344%
midres: avg_psnr -0.466%; ovr_psnr -0.447% ssim -0.513%

AWCY - High Latency:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.2758 | -0.1526 | -0.0965 |  -0.2581 | -0.2492 | -0.2534 |    -0.2118

AWCY - Low Latency:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-1.0467 | -1.4500 | -0.9732 |  -0.9928 | -1.0407 | -1.0180 |    -1.0049

Compared against the baseline (default enabled tools excluding ext-tx
and global-motion for encoder speed concern) without
one-sided-compound, the coding gain of
ext-comp-refs + var-refs - one-sided-compound is:

lowres: avg_psnr -0.875%; ovr_psnr -0.877% ssim -0.895%
midres: avg_psnr -0.824%; ovr_psnr -0.802% ssim -0.843%

Change-Id: I8de774c9a74c20632ea93ccb0c17779fa94431cb

Building with --enable-dct_only will force the encoder to use only
 tx_type == DCT_DCT.
This experiment gives a loss and is only added for testing.

subset-1:

master@2017-02-21T01:23:58.825Z ->
 master-dct_only@2017-02-21T02:57:28.585Z

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
2.5467 |  1.0524 |  0.9171 |   1.8849 | 2.6626 |  2.4995 |     1.8402

objective-1-fast:

master@2017-02-21T01:47:43.790Z ->
 master-dct_only@2017-02-20T16:54:03.578Z

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
1.6625 |  0.3948 |  0.3368 |   1.5268 | 1.7142 |  1.7097 |     1.0743

Change-Id: I19b738f3d1a450bc50422149ac42bc184bfae08a

Removing these flags make the EC_ADAPT experiment an integral part of
 the draft AV1 bitstream definition
This commit has no effect on metrics.

Change-Id: Ice78520935e8bfa9d25cf4b8384a1b872069d09c

This experiment removes the tx_mode flag from the uncompressed frame
 header and instead always uses a constant value.

objective-1-fast:

master@2017-06-29T00:51:22.142Z -> no_tx_mode@2017-06-29T01:09:32.392Z
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0103 |  0.0183 | -0.0076 |  -0.0103 | -0.0052 | -0.0208 |     0.0004

Change-Id: I9d49c4d99ed102e52c86e339f20623063886f49d

This reverts commit 3d264da2.

This causes codecbase 30% compression performance regression.

BUG=aomedia:632

Change-Id: I84ce601b54cd48e06d2609f1de3e325e9fc08785

This coding tool is targeted at tuning the encoder decisions on
altrefs, including the temporal filtering strength applied to the
altrefs, the structure of the gf (Golden Frame) groups, etc.

Change-Id: Ifd0ff1c35c23ecb005192b874a8d4e61a8ad6bd3

ported from libvpx:
bcfd9c975 Add support for Visual Studio 2017

Change-Id: I86c8848ce6626fa218a38bfbd3e39abb60420218

The encoder and decoder will now use the 16-bit (high-bitdepth)
coding path, regardless of the encoding profile.

This is a step towards the removal of the 8-bit (low-bitdepth)
coding path (which remains compile-checked at the moment).

BUG=aomedia:39

Change-Id: I6f8e8f1ce7a3bf1d3da7fda8461b1214ef579c64

This tool is a gadget for offline probability training.

A binary executable aom_entropy_optimizer will be generated in
tools/. It parses a binary file consisting of counts written in
the format of FRAME_COUNTS in entropymode.h, and computes the
optimized probability table, which will be written to a new c file
optimized_probs.c using the format in entropymode.c.

Command line:
./aom_entropy_optimizer [directory of the count file]

The input file can be either be generated from a single run by
turning on entropy_stats experiment(counts are accumulated from
frame to frame, and finally written to counts.stt), or be collected
at a larger scale, at which a python script (will be provided soon)
can be used to aggregate multiple stats output.

Optimization for initial CDFs will be also supported later.

Change-Id: I32070721aa8059439feb6b5a3a179f1001c66bb7

Work in progress to generate ARF with stitched background image.

Change-Id: I2fea75bbe5ac6f713f53eb5825776dadfc1d98c5

This experiment was provisionally adopted on 2017-06-27.

Change-Id: Ic7eb232b8187133f59956eed09e5f5de02c0986e

BUG=aomedia:621

Change-Id: I60b4fa9e5ebbef37bf1859a98d82c34821d2d02b

NCOBMC_ADAPT_WEIGHT allow using different interpolation kernels
to combine overlapped predictions generated using mvs in the
neighboring blocks.
This experiment will build on top of MOTION_VAR and it might conflict
with WARPED_MOTION in the developing stage, so will only be effective
when MOTION_VAR is on and WARPED_MOTION is off.

Change-Id: I4f1b6e55b6146ed443955751c09bfa22ef2f33e8

BUG=aomedia:620

This reverts commit 4da880bd.

Change-Id: I40a2295083b3328ef743d3eab9c2aa514dc698eb

The encoder and decoder will now use the 16-bit (high-bitdepth)
coding path, regardless of the encoding profile.

This is a step towards the removal of the 8-bit (low-bitdepth)
coding path (which remains compile-checked at the moment).

BUG=aomedia:611

Change-Id: Ie764c39a327d48b18d77246a028493b6270b9f88

The tool of ext-comp-refs adds the uni-directional compound reference
prediction. In details, 3 pairs of uni-direcitonal compound references
are added for the comp ref prediction:
(LAST_FRAME, LAST2_FRAME),
(LAST_FRAME, GOLDEN_FRAME), and
(BWDREF_FRAME, ALTREF_FRAME).

This new tool of ext-comp-refs will eventually overwrite
one-side-compound and have the two coding tools to merge to one.

It achieves -0.35 ~ -0.55% coding gains in BDRate, compared against
AV1 baseline with the default experiments on, but without
one-sided-compound. It achieves -0.2% ~ -0.3% coding gains when
one-sided-compound is on. It achieves larger gains on higher
resolution.

Change-Id: Icbdb16e97b96aaebaf2213f5f72d5331e2e358eb

Simplify the number of different compile and code paths.

Change-Id: Id5b061571daeb070b91ec762fe7e07e8c114229e

This tool was temporarly disabled because
it accidentaly triggered bug:

https://bugs.chromium.org/p/aomedia/issues/detail?id=575

This bug was fixed with commit:

6c20c78f

Change-Id: I33d8e0ce4f1c5dccef42588c62f4dc15828ce09b

This patch will not cause any performance change regardless of whether
speed_refs is on or off.

This coding tool is targeted to speed up the encoder side reference
frame selection process. The essential idea is to have two scanning
passes for each superblock of size 64x64 and this CL lays out the
initial framework but no reference frame selection is done yet:

First scanning pass - To simplify the partition and the mode
candidates (e.g. considering nearestmv / nearmv / zeromv only) and
identify the best reference frame prediction candidates;

Second scanning pass - Use the best reference frame candidate(s)
obtained from the first pass to encode the current superblock.

Change-Id: I11266d468de3077271a5e866eebd341a8014d136

Change-Id: If93f9e41c25a5885b5927e66a298c129bb844e18

Change-Id: Iba98b07d2f19fd98be07d0c2c80c855661df778d

Now the single ref comp mode should work with WEDGE and
COMPOUND_SEGMENT. For motion_var, the OBMC_CAUSAL mode uses the 2nd
predictor if the neighboring block is single ref comp mode predicted.

This patch removes the mode of SR_NEAREST_NEWMV and leaves four
single ref comp modes in total:

SR_NEAREST_NEARMV
SR_NEAR_NEWMV
SR_ZERO_NEWMV
SR_NEW_NEWMV

Change-Id: If6140455771f0f1a3b947766eccf82f23cc6b67a

A new experiment SBL_SYMBOL, meaning superblock-level symbols, will
be explored. It allows some symbols being coded at superblock level
(64x64) by checking whether a symbol(e.g. motion_mode, tx depth,
and interpolation filter) is identical across macroblocks in a
superblock.

Change-Id: I38408325c9b7a4b94c11c400a5060036ce36405e

This reverts commit bf3813a1.

Reason for revert: feature not ready.
Incompatible with lossless under some circumstances,
causes the following assertion failure:
Assertion `(!is_compound) == (cm->reference_mode == SINGLE_REFERENCE)' failed

BUG=aomedia:575

Change-Id: I63a2b38ce3b7cb50108ac559cca0768b4579c9ae

Earlier, intra prediction for rectangular blocks was performed by
running two steps of prediction on square sub-blocks.

With this experiment, we do proper intra prediction for rectangular
blocks. This ensures that we make use of all available neighboring
pixels especially for directional modes. For this, all the intra
predictors were updated to work with rectangular transform block sizes.

Performance improvements are small but free of cost:

All Intra frames:
lowres: -0.126
midres: -0.154

Video Overall:
lowres: -0.043
midres: -0.100

[Could not get AWCY results due to a backlog.]

BUG=aomedia:551

Change-Id: I7936e91b171d5c246cb0a4ea470a981a013892e6

this change makes parallel deblocking experiment works with
cb4x4. the inner loop process every 4x4 block.

Change-Id: I86adb3d7b6d67a91ccc12aab29da9bfb8c522cf1

Move the large stack allocation from stack initialization to
dedicated mem space. This resolves the extremely large stack issue
when ext-partition, motion-var, and high bit-depth are all turned
on.

BUG=aomedia:415

Change-Id: I85b77bbc6429093fcb0152176d9e237087d6bbd8

(1) Make unit tests for masked sad/variance encoder-only
(2) Fix compile error with intrabc
(3) Fix warnings reported by static analysis

Change-Id: I0cd2176fcda0b81e1fc30283767678376ced4c42

Change-Id: I7bceace31c118993228168ec04f12319a9011f6b

Change-Id: I05b2c8c116b5e3287be2703e840a28f6dda9c42a

Change-Id: I013c15acdfb968702360bd7deb231900f7880f49

This patch forces DAALA_EC on by default and removes the dkbool coder.

Change-Id: Icd2ff08efd7bf467adf554344111473cb357adf8

This coding tool is targeted to check redundant references available
to each frame at the frame level, and then try to save bits to avoid
coding redundant reference information at the block level.

Change-Id: I320178a9fe0cd806960318ac59659808675e5176

This was being worked around by forcing highbitdepth to be off when
enabling tx64x64.

With the fixes, removed the work-around.

Change-Id: I3102f9e17d4037af96a9eff418c5af6a97fd740c

Use CONFIG_AV1_DECODER and CONFIG_AV1_ENCODER instead.

Change-Id: I33d83aa6d31067d0db7a972d36927dc49c420f81

Change-Id: I3f73ccdb82261d13580697c162b7f5c877616f32

Change-Id: I4756594a6975ad0fff1f4ff64f1cf02876757f02

This reverts commit 05c38874.

BUG=aomedia:553

Change-Id: Ibbfe3e357bbfb8cb7d07482755c47c64afd30092

Encode a block line by line, horizontally or vertically. In the vertical
mode, each row is predicted by the reconsturcted row above;
in the horizontal mode, each column is predicted by the reconstructed
column to the left.

The DPCM modes are enabled automatically for blocks with horizontal or
vertical prediction mode, and 1D transform types (ext-tx).

Change-Id: I133ab6b537fa24a6e314ee1ef1d2fe9bd9d56c13