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This reverts commit 97535038.

Change-Id: I9f8e891739352ca2bde4b294e37c85a668f416e0

These signals were in the uncompressed frame header (as a temporary
hack), which caused two problems:

* We don't want that header to be duplicated in the slice header
* It was necessary to signal the number of bits to transmit up front

However, the filter size can be 128x128 which is greater than the SB
size, and a decoder wouldn't be able to know whether to read a bit or
not until the final SB of that 128x128 block has been decoded
(depending on whether the 128x128 is all skip or not).  Therefore the
signalling was changed for 128x128 blocks so that every top left SB of
a 128x128 filter block contains a signal regardless of whether the
block is all skip or not.  Also, all the MB's of 128x128 block are
filtered even if they are skip MB's.  This gives the signal a purpose
even when the 128x128 block is all skip, and it also gives a slight
coding gain as it leaves a way to filter skip blocks, which was
previously forbidden.

Low latency:
PSNR YCbCr:     -0.19%     -0.14%     -0.06%
   PSNRHVS:     -0.15%
      SSIM:     -0.13%
    MSSSIM:     -0.15%
 CIEDE2000:     -0.19%

High latency:
PSNR YCbCr:     -0.03%     -0.01%     -0.09%
   PSNRHVS:      0.04%
      SSIM:      0.00%
    MSSSIM:      0.02%
 CIEDE2000:     -0.02%

Change-Id: I69ba7144d07d388b4f0968f6a53558f480979171

To get ready for pulling AV1 to nextgenv2
Replace the experimental flag by MOTION_VAR. Rename major variables.

Change-Id: If6cf4f37b9319c46d8f90df551cc7295d66ca205

Change-Id: I332afb8d9e35cd60f05915160a5b2e1dc8757de5

Change-Id: Ia5175afe82b142d9e18c01c546610202c630588e

No change in the output

Change-Id: I1627feaa163d65da0df90e9dacbc5e39ee755de8

Making sure we never exceed a base level of 63

Change-Id: I821254b8d970446bd40fdd6e4d7073c69760a86d

Doesn't change the output, but avoids useless deringing with threshold=0

Change-Id: I69f3e54abad2d2493cfbc76c188ad7d190f0aeff

Change-Id: I363f7fb610a5c86ea9f417e34b57c6373af877e5

* changes:
  Deringing cleanup: remove DERING_REFINEMENT (always on now)
  Don't run the deringing filter on skipped blocks within a superblock
  Don't dering skipped superblocks
  On x86 use _mm_set_epi32 when _mm_cvtsi64_si128 isn't available

Currently the patch does not have any impact on the RD performance. The
fix could however potentially help on the next step of work, especially
when the extra altref frames allow non-zero temporal filtering strength
and their corresponding OVERLAY frames, i.e. the INTNL_OVERLAY frames
are being added.

Change-Id: I2e07fb3d0aa547a0b5dd05bb4ba865cd46309076

Change-Id: Ie86aedfb1f3e0d9c0cf58d7183861a0ed0e8ccc8

This would have caught the bug introduced in patch set 1 of
https://chromium-review.googlesource.com/#/c/397378/

Change-Id: I9c6d5d9c4c98aed5ac48c4fb1c4ff4131b0df1d5

Use constrained token table row 65/256 instead.

Change-Id: I8b442d4c82af8fa9d36ac2de0d73179ed040478d
(cherry picked from commit 47eb9a2c)

* changes:
  Remove custom rans types
  Remove add_token_no_extra.
  Remove unused aom_rans_build_cdf_from_pdf
  Add the tool used to generate the constrained tokenset.
  Remove the starting zero from ANS CDFs.
  Import the aom_read/write_symbol abstractions from aom/master

Change-Id: I1241257430f1e08ead1ce0f31db8272b50783102

(cherry picked from aom/master commit 11206c60)

Includes renames in a bunch of places not handled by the original
due to differing tree states.

Change-Id: Ic74d9d8850b8c80a51e55e425bbf472a67e2653f

Add 2x2 DC, V, H, TM intra predictors.

Change-Id: I2a614adde553f821c45bc5a9bf09800a9f0aaa26

PSNR YCbCr:      0.03%     -0.00%      0.07%
   PSNRHVS:      0.06%
      SSIM:      0.12%
    MSSSIM:      0.09%
 CIEDE2000:      0.05%

Change-Id: I15ef9598a08f6713bc28ab98b0182310433e97ef

Avoids blurring chroma for 4:2:0

PSNR YCbCr:      0.03%     -0.31%     -0.29%
   PSNRHVS:      0.02%
      SSIM:      0.03%
    MSSSIM:      0.02%
 CIEDE2000:      0.01%

Change-Id: If744fb902b5f24404479def22b9ca8a19baec722

No point in keeping them in sync now that all the code is reformatted

Change-Id: I8a062253ed6a5f86028cd5a2a922b3c760def6fb

objective-1-short results (with deringing enabled):
PSNR YCbCr:      0.08%      0.03%      0.11%
   PSNRHVS:      0.06%
      SSIM:      0.12%
    MSSSIM:      0.08%
 CIEDE2000:      0.05%

Change-Id: Ifcfc42c14c33650dcf879c4d0ddd8688d4d07da1

It was a fairly small production optimization for VP9.

Change-Id: Ie93b474ea5b7e63384a7c0b3a56b135462d1471b
(cherry picked from aom/master commit df9bb76b)

Change-Id: I544989eae45b7dda04250365c3de99f50110a76b
(cherry picked from aom/master commit 06cce842)

The code that generates the raw distribution is based on a MATLAB
program by Debargha Mukherjee, and the algorithm used to quantize the
distribution comes from the ANS Toolkit by Jarek Duda.

Change-Id: Ic273f7d9e43e3ecd999e9e7e04cde57e8559375a
(cherry picked from aom/master commit ef446026)

This brings it in line with the Daala CDFs and will make it easier to
share code.

Change-Id: Idfd2d2b33c3b9b2c4e72ce72fb3d8039013448b9
(cherry picked from aom/master commit af98507c)

Change-Id: I0b255c05108c3b97e74df1b59c34111c9e9a5770