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Here we create a default set for the ext-tx experiment which
includes:

Intra: {DCT, ADST} X {DCT, ADST} + IDTX (identity in both directions)
Inter: DCT_DCT + IDTX

This set is used if indicated in the uncompressed header.

Change-Id: Ic907ada12b4e0c98cabb7c9650ab99942d0c0859

Use the top-left 4x4 luma block's coding information for chroma
component encoding at size 4x4.

Change-Id: I4bcfbc2bf8b71f7fc30094553503468460a56f9b

The result is identical to enabling both deringing and CLPF

Change-Id: I71db5ba9e21fcaf11ad87e94841eaf80be58c0a8

Change-Id: I1bf9002c159563d0e5238b26d1515ef305d416dc

Change-Id: I1050b69045407381d4626b65a0bf6f35957a66f4

This commit renames deblocking_across_tiles to loopfilter_across_tiles, 
to get ready for dering and clpf integration.

Change-Id: Id25b051da9b1e5cb92f35a9619662597462d9537

Change-Id: Ieb2922c3df4ef4f8514b8a6df6f9a8fc45ef3cf4

Change-Id: Id01c785ad48134075c4f6643233413564f0b8fbc

This commit fixes an enc/dec mismatch issue in ext-partition-type
in the cb4x4 mode.

BUG=aomedia:137

Change-Id: I19f538a967a6059a40b1668eed076bc315b46149

Change-Id: I3d64ec4bbc72143b30a094ece7a6c711d6b479cd

At the edges of the picture only a subset of partitions are legal. Add
new contexts for these borders so they don't distort the probabilities of
the interior of the image where all partitions are legal.

Only include one context for each block size of each border direction
because so few blocks fall into these contexts to begin with.

objective-1-fast:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0294 | -0.0911 | -0.2382 |  -0.0481 | -0.0441 | -0.0450 |    -0.0454

derf144: -0.135
lowres: -0.124
midres: -0.076
hdres: -0.078

Change-Id: I909b98eebb7e49273cde90154c8408febe334158

Make the transform block partition context model support the
rectangular transform block size partition. The coding gains
from cb4x4 and var-tx are:
          cb4x4 + var-tx
lowres         4.3%
midres         2.6%

Change-Id: I6cc1413fbf6d7707ca7fd24300623a3f0118be7c

This commit reworks the transform block partition context update
to support cb4x4 mode in the recursive transform block partition.
It resolves the remaining enc/dec mismatch issue when both cb4x4
and var-tx are turned on.

Change-Id: I850d121204fe4c68e81488f1d2848c570d9d08b9

Enables Wiener based loop restoration only for the UV
frames. The selfguided and domaintranform filters do not
work very well for UV components, hence they are disabled.
For each UV frame a single set of wiener parameters are
sent. They are applied tile-wise, but all tiles use the
same parameters.

BDRATE (Global PSNR) results:
-----------------------------
lowres: -1.266% (up from -0.666%, good improvement)
midres: -1.815% (up from -1.792%, tiny improvement)

Tiling on UV components will be explored subsequently.

Change-Id: Ib5be93121c4e88e05edf3c36c46488df3cfcd1e2

Change-Id: Ic0eba16329d7b63dd7d18e9cd28b89be4b5f2710

This commit adds a new experiment to allow disabling of loop filtering
on tile boundaries. It is implemented by adding a syntax field
"loopfilter_across_tiles_enabled" into the uncompressed frame header. 
If it is set to 0, decoder and encoder will disables loop filtering for
block edges that are also tile boundaries.

Change-Id: Ib80bfd82d49c74f1ba46ae18ceedb30704ac8aa5

Change the table content to support 4x4 mode_info unit. Refactor
partition_plane_context() to reflect the fact that the minimum
partition block size is 8x8.

Change-Id: Id26fcfba8d74efdb9ae316c9d066cd65358dd7e6

Make the block size and mode_info size scalable to mode_info unit
size.

Change-Id: I38c49bad118e0565a104cb6edfc3e3266519f9ee

Change-Id: Ib7807125e533c32dad04b02bc54838dd1e90e8af

Separate the use cases of number of 8x8 blocks from those of
mode_info array. This allows the mode_info array processing to be
scaled to 4x4 resolution.

Change-Id: Iab78f2540355ce7658d9ea21e902a86f71148d8f

Scale up the mb_mode_info resolution from 8x8 to 4x4 unit.

Change-Id: I60ee20f5fc353a3c16ced14b55422fc5e4ea1e06

Introduced in I2c0bc4ba540886dd196e87a78b205407ad3e866b

Change-Id: I9ff49e7d37c5a1fea8dc8b5659a53697f76320df

Adds 64x64 default scan orders
Adds 64x64 coefficient entropy models (just copy the 32x32 ones)
Entropy context updates for 64x64 transform
Various misc. changes to support 64x64 transforms

Change-Id: I2c0bc4ba540886dd196e87a78b205407ad3e866b

After https://aomedia-review.googlesource.com/#/c/5589/ ,
the Global_Motion_Params and GLOBAL_MOTION_TYPE types
are redundant, and can be removed in favour of
WarpedMotionParams and TransformationType respectively.

Change-Id: I33f3796e5c469e595fd012ccdb65a672dd1bb86c

Reset the transform block size context to the actual block size
if the skip flag is turned on.

Change-Id: I821afac2dcd4c3a17389e9954b7b2575f87d07d7

Change-Id: Iaaf9244678cde74cf3e216f3b8c9d293f206f27e

Replace max_tx_size with min_tx_size for transform type decision.

Change-Id: I64e39923a67903d52b381bd93eaac33b3400a201

PVQ replaces the scalar quantizer and coefficient coding with a new
design originally developed in Daala. It currently depends on the
Daala entropy coder although it could be adapted to work with another
entropy coder if needed:
./configure --enable-experimental --enable-daala_ec --enable-pvq

The version of PVQ in this commit is adapted from the following
revision of Daala:
https://github.com/xiph/daala/commit/fb51c1ade6a31b668a0157d89de8f0a4493162a8

More information about PVQ:
- https://people.xiph.org/~jm/daala/pvq_demo/
- https://jmvalin.ca/papers/spie_pvq.pdf

The following files are copied as-is from Daala with minimal
adaptations, therefore we disable clang-format on those files
to make it easier to synchronize the AV1 and Daala codebases in the future:
 av1/common/generic_code.c
 av1/common/generic_code.h
 av1/common/laplace_tables.c
 av1/common/partition.c
 av1/common/partition.h
 av1/common/pvq.c
 av1/common/pvq.h
 av1/common/state.c
 av1/common/state.h
 av1/common/zigzag.h
 av1/common/zigzag16.c
 av1/common/zigzag32.c
 av1/common/zigzag4.c
 av1/common/zigzag64.c
 av1/common/zigzag8.c
 av1/decoder/decint.h
 av1/decoder/generic_decoder.c
 av1/decoder/laplace_decoder.c
 av1/decoder/pvq_decoder.c
 av1/decoder/pvq_decoder.h
 av1/encoder/daala_compat_enc.c
 av1/encoder/encint.h
 av1/encoder/generic_encoder.c
 av1/encoder/laplace_encoder.c
 av1/encoder/pvq_encoder.c
 av1/encoder/pvq_encoder.h

Known issues:
- Lossless mode is not supported, '--lossless=1' will give the same result as
'--end-usage=q --cq-level=1'.
- High bit depth is not supported by PVQ.

Change-Id: I1ae0d6517b87f4c1ccea944b2e12dc906979f25e

PVQ replaces the scalar quantizer and coefficient coding with a new
design originally developed in Daala. It currently depends on the
Daala entropy coder although it could be adapted to work with another
entropy coder if needed:
./configure --enable-experimental --enable-daala_ec --enable-pvq

The version of PVQ in this commit is adapted from the following
revision of Daala:
https://github.com/xiph/daala/commit/fb51c1ade6a31b668a0157d89de8f0a4493162a8

More information about PVQ:
- https://people.xiph.org/~jm/daala/pvq_demo/
- https://jmvalin.ca/papers/spie_pvq.pdf

The following files are copied as-is from Daala with minimal
adaptations, therefore we disable clang-format on those files
to make it easier to synchronize the AV1 and Daala codebases in the future:
 av1/common/generic_code.c
 av1/common/generic_code.h
 av1/common/laplace_tables.c
 av1/common/partition.c
 av1/common/partition.h
 av1/common/pvq.c
 av1/common/pvq.h
 av1/common/state.c
 av1/common/state.h
 av1/common/zigzag.h
 av1/common/zigzag16.c
 av1/common/zigzag32.c
 av1/common/zigzag4.c
 av1/common/zigzag64.c
 av1/common/zigzag8.c
 av1/decoder/decint.h
 av1/decoder/generic_decoder.c
 av1/decoder/laplace_decoder.c
 av1/decoder/pvq_decoder.c
 av1/decoder/pvq_decoder.h
 av1/encoder/daala_compat_enc.c
 av1/encoder/encint.h
 av1/encoder/generic_encoder.c
 av1/encoder/laplace_encoder.c
 av1/encoder/pvq_encoder.c
 av1/encoder/pvq_encoder.h

Known issues:
- Lossless mode is not supported, '--lossless=1' will give the same result as
'--end-usage=q --cq-level=1'.
- High bit depth is not supported by PVQ.

Change-Id: I1ae0d6517b87f4c1ccea944b2e12dc906979f25e

Count the transform block partition context in the unit of pixels.

Change-Id: Ibb66f053526ed347ad0274b78db7ac35cc086b0e

This commit allows the partition context model to account for the
maximum transform block size of the coding block.

Change-Id: I22b91e85fff70faa974afd362ce327d3f2eda81d

Change-Id: I7d2414a8766141d5109b599271179bc505c772d3

Factor common codes that show up in multiple places.

Change-Id: I0a72213a151f74bdad926d59f86f0a28d00968fc

This experiment performs symbol-by-symbol statistics
adaptation for non-binary symbols. It requires DAALA_EC or
RANS and ANS to be enabled. The adaptation is currently
based on a simple recursive filter and is taken from
Daala. It has an adaptation rate dependent on alphabet size,
taken from Daala. It applies wherever non-binary symbols
are encoded using Cumulative Probability Functions rather
than trees.

Where symbols are adapted, forward updates in the compressed
header are removed.

In the case of RANS coefficient token values are adapted,
with the exception of the zero token which remains a
binary symbol. In the case of DAALA_EC other values
such as inter and intra modes are adapted as CDFs are
provided in those cases.

The experiment is configured with:

./configure --enable-experimental --enable-daala-ec --enable-ec-adapt

or

./configure --enable-experimental --enable-ans --enable-rans \
    --enable-ec-adapt

EC_ADAPT is not currently compatible with tiles.

BDR results on Objective-1-fast give a small loss:

PSNR YCbCr:      0.51%      0.49%      0.48%
PSNRHVS:      0.50%
SSIM:      0.50%
MSSSIM:      0.51%
CIEDE2000:      0.50%

Change-Id: I3888718e42616f3fd87144de7f125228446ac984

This is a manual adaptation of the following commit from aom/master:
ce12003d

The original commit message:

A tile group is a set of tiles in scan order.

Each tile group has a version of uncompressed and compressed headers,
identical apart from tile group parameters.
Encoding probability updates takes account of the number of
headers to control overheads.

The decoder supports arbitrary numbers of tile groups with
arbitrary number of tiles. The number of tiles in a TG is
signalled in the uncompressed header for that TG.

The encoder currently only supports a fixed number
of TGs (3, when error resilient mode is on) of equal size
(except possibly for the last one).

The average BDR performnce with 3 tile groups versus
anchor with error resilient mode and up to 16 tiles is:

NR YCbCr:      3.02%      3.04%      3.05%
PSNRHVS:      3.09%
SSIM:      3.06%
MSSSIM:      3.05%
CIEDE2000:      3.04%

Change-Id: I9b97c5ed733103b9160a3a5d4370de5322c00c0b

Make the codec support 2x2 tranform block unit for chroma components.

Change-Id: Ic454535bd5620abe88a2e99789160cc4664ee518

Simplify the input arguments. Make direct use of the block size
in the unit of pixels.

Change-Id: Ifec9d90b4b4fa9605f93b4f93b8242f76f898b5f

This prepares for the next refactoring to support 2x2 transform
block sizes.

Change-Id: Ia06bc487da34e853ef9323cd13e3d482e819db43

Move computing the kf_y_mode_cdf tables per coded intra mode symbol to
 computing them only when the probabilities are updated.

Change-Id: I5999447050c2f7d5dbccde80bee05ecd1c5440ab

Remove the separate implementations of set_contexts() in encoder
and decoder.

Change-Id: I9f6e9b075532faae0f74f885d9443589254258a7