* 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

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

(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

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

Change-Id: Ic3a6855799be010e69aeab924b013679282ab191

No change in metrics

Change-Id: Ib1dbe41a9e1a564dd9a63a33e2a5315ad6bca70c

No change in metrics

Change-Id: I0da09270d78c3caf78a32a3157f02c87f2232e3e

Change-Id: Ibdbd720d4f68892da6164a9849e212e759305005

* changes:
  Unfork ANS decode_coefs
  Remove ZERO_TOKEN from the ANS tokenset
  Drop costing ANS tokens from derived probabilities
  Unfork ANS pack_mb_tokens

Fix a bug in the C implementation of the ihalfright32
transform, in the case that its input and output buffers are the same.
This occurs when it is called by av1_iht32x16_512_add_c.

Change-Id: I61c652e2662178520c0639a2879ae128a9c7ec3f

- av1_fht32x32 AVX2 function level time reduction ~89% compared to C.

- av1_fht32x32_avx2() on DCT_DCT improves 42.62% over aom_fdct32x32_avx2()
  But function replacement must go with the corresponding inverse txfm.

- No obvious user level time reduction due to 32x32 TX_TYPE selection.

- Zero high 128b YMM to avoid AVX-SSE transition penalties
  (fix 16x16 case).

- Added 32x32 AVX2 unit tests to verify bitexact.

- AVX2 optimization summary:
  On CPU i7-6700, based on 16x16/32x32 fwd txfm optimization results:
  C to AVX2: function level time reduction, ~86-89%.
  SSE2 to AVX2: function level time reduction, ~51%.

Change-Id: Idd0cd8bf066a61c7117140ef15ab6c1f8eb4b036

This is less code and more like what we have in aom/master.

Change-Id: I3ca2b674e4ad9e2e211d08bb51d78549e8b63a54

This can be re-added after aligning AOM's ANS with nextgenv2's ANS.

This partially reverts commit 3829cd2f.

Change-Id: I78afc587f1abfe33ffcd53b3262910cfae135534

This mimics what's currently done in aom/master. This can be re-added
after aligning AOM's ANS with nextgenv2's ANS.

Change-Id: I3ae62181dd4803694204a234c717a86a15ca8a40

This is less code and more like what we have in aom/master.

Change-Id: I5ed915563cbfbc6281113c1eb31455f50710ba9f

script changed to remove extra entities and clang-format bot.

Change-Id: I102cd80fdf4b240e6e4d5172943e49146a601a72

BUG=webm:1311

Change-Id: I03c1043d17ed4e4ea22002473779a9612884c6c6

1. vp8->aom
2. removed no-effect statements and spaces

Change-Id: I367d05ff9bf1b9f3c71c517c45d8049d9d4236ec

Change-Id: I98919a04bead417379e555461f67978501f922e7

Also, fix the warnings generated by this flag.

Conflicts:
	examples/aom_cx_set_ref.c

Change-Id: I0451e119c52000aa7c1c55027d53f1da5a02a11f