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

Broken by I233979909118241a0c78761c1d5c2cd6857915e0

Change-Id: I3af0d3907f63b69c1301a48e7d2a276c52d3fd00

Change-Id: I1050b69045407381d4626b65a0bf6f35957a66f4

By default, the activity masking is used with PVQ.
In addition to '--enable-pvq', '--enable-daala-dist' is also
required by configure to use the activity masking.

Change-Id: I5100a1db992f0e693e61daf5439de8ae8c64a752

For fixed-point version of PVQ, which is current default,
added MAXI(1, ) to limit the minimum companded or expanded gain to be one.
Previously, gain compand/expand function, which is invoked when
activity masking is enabled, sometimes outputs zero
then triggered the assert(gain != 0).

Metric change from floating-pt to fixed-pt PVQ is:
PSNR  PSNR-HVS  SSIM  CIEDE-2000  PSNR Cb PSNR Cr MS-SSIM VMAF
0.02  0.10      0.08  0.11        0.01    0.02    0.13    -0.30

Change-Id: I64a60d1970d35a26af227841e4a5e50a89ddc44c