This fixes a decoding failure issue of adaptive scan order in the
error resilient mode.

BUG=aomedia:353

Change-Id: I4b09f168cd0e0efc843a05f82d7e1c05173ee629

Change-Id: Icb4ab1de851db9f4016af8757e17fcb935a2db5a

* Replace struct rans_sym parameter with values. It only had two entries.
* Document functions.
* Use longer variable names.

TODO: Refactor the unit tests.

Change-Id: Idad65117dab565786697015ef07070e1c308d963

This saves the cost of encoding one symbol per partition. Currently in
practice this is usually the last DCT token sign so it saves one bit.
Most of the time these gains aren't realized but occasionally it makes
the final state one byte smaller or saves one renormalization.

Change-Id: Ibe5dc5d3471f51f932164b32e3bf28fb7b914805

The reference frame handling in av1_find_mv_refs introduced
in https://aomedia-review.googlesource.com/c/6067/ broke the
compile when global-motion is enabled but ref-mv is not.
This patch adds the missing logic, allowing this case to compile
again.

Change-Id: I914887eb56d28a700b2917d086447bdbb314f35d

Change-Id: I1f715581e801f098097b44000d8e200a7d50f016

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: I196e343c25e31caffc214f609e5a2f7703b1202e

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: Ieec0ba8a7a6aec87a531a3daea09591034bb6d0f

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: I917896f377ce16bc7035311c3ecc2a6a3414b93c

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: Ia60540f27e2e3d286528f5be3e3d7044e3f615d1

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: I6fa298e6b9dd6b40bd2322a1b78c79d35a34fa93

- Same googletest release (v1.8.0), new root in third_party.
- Update Android.mk and make build (include and file locations).
- Update cmake build (use googletest's cmake support).
- Update gtest include in all tests.

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: I5491a2ff3c8869263cd885872c815402236c20b1

Change-Id: I1bf9002c159563d0e5238b26d1515ef305d416dc

The write_intra_mode() function is not called when compiling with
 --enable-ans and --enable-ec_multisymbol.

Change-Id: I86f9cdf554586194ecc1fba7264ea0cac86338a9

This allows Y and UV planes use different filter kernel

Change-Id: I524aa3f6ffbc439acee6660bdbaf5cf2059379b5

This CL allows us to use different interpolation filters for
YUV planes.

Change-Id: I9446d43ae2be5a9a48b8a4cb6efcac43df6196d5

Change-Id: I1bf9c2fcd664fb4012d67e420cac613eaca735a8

This commit makes the adaptive scan order system support multi-
thread encoding. It fixes unit test failure issue associated with
AV1/AVxEncoderThreadTest.EncoderResultTest/0.

BUG=aomedia:353

Change-Id: I61cbf9531c8deab97fb3bb17428d0b2a63cf309a

Skip rectangular transform block size coding for intra coded block
in var-tx mode, when the rect-tx is disabled.

Change-Id: If3a091d25f19bf4a67485b5d235bb3d7d0c2cd03

The performance change is 0.004% on lowres

Change-Id: If3702ba6377ac42997e7d49b8959ff16fb182daa

The WienerInfo struct requires a 16-byte alignment on x86,
since it contains filter coefficients which are loaded using
SSE aligned load instructions. But on 32-bit x86, the default
alignment of aom_malloc/aom_realloc is only 8 bytes, leading
to occasional segfaults.

To fix this, rather than using aom_realloc to resize WienerInfo
structures, we always free and re-allocate them using aom_memalign

BUG=aomedia:345

Change-Id: Ib1b2a42d4a2fa215dcc81ea481c51271ab068a37

Noticed that some ALTREF_FRAMEs could have used compound modes for its
prediction but have been labeled as SINGLE_REFERENCE mode in the frame
header. This experiment is to remove the COMPOUND_REFERENCE mode from
the frame-level reference mode choices and only leave SINGLE_REFERENCE
and REFERENCE_MODE_SELECT the two choices in the frame header.

When turning on both ext-refs and ref-adapt, compared against ext-refs
itself, a small gain is achieved. In PSNR, the bitrate saving gains are
as follows:

lowres: Avg -0.120%; BDRate -0.128%
midres: Avg -0.155%; BDRate -0.128%

Change-Id: I2cfff8a6b7eaa65ef863dbdbc4dd086d3b586f8c

Gives 7% speed-up in the CLPF processing (measured on SSE4.2).

Change-Id: I934ad85ef2066086a44387030b42e14301b3d428

CLPF performance had degraded by about 0.5% over the past six months,
which isn't totally surprising since the codec is a moving target.
About half of that degradation comes from the improved 7 bit filter
coefficients.  Therefore, CLPF needs to be retuned for the current
codec.

This patch makes two (normative) changes to the CLPF kernel:

* The clipping function was changed from clamp(x, -s, s) to
      sign(x) * max(0, abs(x) - max(0, abs(x) - s +
             (abs(x) >> (bitdepth - 3 - log2(s)))))
  This adds a rampdown to 0 at -32 and 32 (for 8 bit, -128 & 128
  for 10 bit, etc), so large differences are ignored.

* 8 taps instead of 6 taps:
               1
    4          3
  13 31  ->  13 31
    4          3
               1

AWCY results: low delay  high delay
PSNR:           -0.40%     -0.47%
PSNR HVS:        0.00%     -0.11%
SSIM:           -0.31%     -0.39%
CIEDE 2000:     -0.22%     -0.31%
APSNR:          -0.40%     -0.48%
MS SSIM:         0.01%     -0.12%

About 3/4 of the gains come from the new clipping function.

Change-Id: Idad9dc4004e71a9c7ec81ba62ebd12fb76fb044a

Change-Id: Ibf160e83e7cb1c7dce8b40e7cbead48416440974

Performance drop by 0.084% on lowres

Change-Id: I2bcaae96b68033a0af7a1da988505623bc14ed94

Change-Id: Iad2b526d65865cbcb2119aca21686563ca8e97fd

ans_multion@2017-01-25T21:00:51.374Z ->
ans_multion_rabs17@2017-01-27T19:25:33.101Z
objective-1-fast
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0494 | -0.0494 | -0.0494 |  -0.0475 | -0.0484 | -0.0488 | -0.0497

Increasing the state any further seems to yield a compression drop.

Change-Id: Iacfd6af7e2b8a47c41033d61e338c5106bd3679c

Change-Id: Icb578f9b54c4020effa4b9245e343c1519bd7acb

The only compound mode used with sub 8x8 blocks is COMPOUND_AVERAGE, so
we don't have to send anything in this case

Change-Id: I90d0162e5f7f1ad205e65094293cde2a48eb77b1

Includes CONFIG_AOM_HIGHBITDEPTH support for same.

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: I99893c8c3c7e163383f7297d0df777c9c21822fd

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: Ibb5564989bd02cf3fec7b8e1d61d2dee1a96c42d

- Comment out the sources that require CONFIG_MOTION_VAR.
- Add missing preproc wrap at the sites in test sources that
  require CONFIG_MOTION_VAR.

Change-Id: I703c2bfd829a579793ad55ae713973d327354473

This ensures we operate at the same precision that Daala uses, which matters
when activity masking is enabled, because of the gain companding.

Metrics from Patchset 4 (which had slightly incorrect rounding):

With activity masking (5 frames only):
av1_pvq_AM_ref_5f@2017-02-07T03:37:53.702Z -> av1_pvq_AM_derf_fix2_coeff_scaling_5f@2017-02-07T00:12:24.427Z

    PSNR |  PSNR Cb |  PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
  0.6653 | -12.3177 | -12.1858 |   0.3350 | 4.1013 |  2.0964 |    -4.0539

In particular for Netflix_Crosswalk_1920x1080_60fps_8bit_420_60f.y4m
 -5.0589 | -22.3077 | -21.2188 |  -7.0389 | -3.3715 |-5.7794 |   -13.1891

I.e., it fixes the large regression with AM on this sequence, and
 substantially improves chroma (at a lesser cost to other metrics).

Without activity masking (5 frames only):
av1_pvq_ref_5f@2017-02-07T03:52:51.279Z -> av1_pvq_derf_fix2_coeff_scaling_5f@2017-02-07T00:12:48.873Z

    PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
  0.0989 | -0.0322 | -0.0464 |   0.1883 | 0.0795 |  0.0579 |     0.0923

Change-Id: I46b808b7c8e4733465f8bebc8336dfd5b75783ec

Insignificant change in BDRate.

Change-Id: Id1aa798393fd4c4c174dfcb9a8315828b531996f

Change-Id: I08a2437e4eb2ef31ec7a675fba6bcec538019241

When convolve_round is on, av1_convolve_2d_facade will be used for
interpolation rather than av1_convolve. Will remove the experiment
code of convolve_round experiment from av1_convolve in another CL.

So far we use 4-bit rounding in the intermediate stage on top of using
post rounding for compound mode after the last stage.

This will give us roughly 0.45% gain on lowres , 0.39% on midres and
roughly 0.6-0.7% on hdres
Altogether, is 1.15% on lowresm, 0.74% on midres and roughly 1.7-1.8% on
hdres

Note that there no restriction usage of 12-tap filter in the CL.
Adding that, we will lose roughly 0.1% again on lowres.

Change-Id: I6332e1d888e28a3b3ddc29711817d66e52cb5cdf

The new_tokenset experiment replaces the unconstrained tokenset with a
multisymbol alphabet in an inventive way.

Tested configurations:
new_tokenset + ec_adapt, new_tokenset, ec_multisymbol

Change-Id: I846ab2e51c2a1dc3f2f9904ed8c47a8e98f853c5

The PVQ QM interpolation code needs to be adapted to AV1 ranges.

av1_float_pvq_dist_scale_AM_5f_Jan31@2017-02-02T08:57:23.156Z
 -> av1_float_pvq_dist_scale_AM_5f_Jan31_crfix@2017-02-02T15:14:40.477Z

  PSNR |  PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
1.8501 | -29.0766 | -6.6775 |   1.8421 | 1.8252 |  1.8228 |    -9.9734

Change-Id: Ib72c1f8eeccf806f8d719866ce80172b6908643e

This is in preparation for expanding the state range.

No discernible compression impact

ans_multioff@2017-01-25T20:58:18.756Z -> ans_multioff_rabs@2017-01-26T01:05:12.801Z

     PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
  -0.0001 | -0.0001 | -0.0001 |  -0.0001 | -0.0001 | -0.0001 | -0.0001

https://arewecompressedyet.com/?job=ans_multioff%402017-01-25T20%3A58%3A18.756Z&job=ans_multioff_rabs%402017-01-26T01%3A05%3A12.801Z

Change-Id: Ie1817991190f1de6d9c31e0c97f77efbd5869d35