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

RD search and trellis encoding are still sub-optimal.

Change-Id: I233979909118241a0c78761c1d5c2cd6857915e0

BDRATE results:
lowres: -0.880% (up from -0.844%)

Change-Id: I017c0beddcc687148fed33c1e9963e05f1eaf6ea

Change-Id: I907976619a433a92d671c5cce25f3e8806638e80

Introduced by change I98b33fab6b9f52690f6ad618ac55e725a97be056

BUG=aomedia:349

Change-Id: Ib6df52ac2442f60c159bae2271793b7570d53a19

Change-Id: I378b677cf579441ba0a9014a8a77a1cf3f8b5689

Change-Id: I8a5288d82e9dda32bf5e47a17c0ee88e4da0b1c5

Change-Id: Ib90be26f69c658a6be6e133097c41845db58b6e1

Change-Id: Ic6a99b82e92f8512bdd40d002aa6b904b768ae9a

Clean up. Remove dead experiment/whatever.

Change-Id: I03cae9c9240e917595aa4a38b1d6d29a2ec19115

Applies only to the tests that require only the presence of
compiler support. Tests that require an instrinsic flag and an
enabled experiment not included.

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

Change-Id: I1ba6ee80cadc3064068db04c15caf8cc2384ab3b

Xcode needs special handling when an executable target contains
no C++ sources, but links C++ dependencies.

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

Change-Id: Ifd4f6208c8f96386194691d45279df1e70a8fc17

Allows for looping over app targets when all targets need
the same update.

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

Change-Id: If9e3f6ab50f06c8c26104942455e6bbfac485cb1

Fixes make clean && make runs (single and multi job) via addition of
new target aom_rtcd that all lib targets depend on. Target includes
the RTCD definition perl files, the output H files, the C files and
rtcd.pl itself.

Also,
- Adds list of lib targets (used to propagate the aom_rtcd dep)
- Use the correct symbol for av1 RTCD gen (aom_av1_rtcd -> av1_rtcd)

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

Change-Id: Ia0e858220c4c2877c6e5f5ffed853be15c6cd711

Change-Id: I49212125058816687535d3b946fccfa47c16aa11

This will allow EOB_TOKEN to be merged with that value.

Change-Id: I82ba5e8d38e235d07894e43b5fec53968f84ab6c

Preparation for merging EOB_TOKEN. The block_zero value
corresponds to the first EOB_TOKEN: other EOB_TOKEN values will
be merged with non-zero values.

Change-Id: I94036783ee240fa916a79c544ecd716a9c24fa59

Change-Id: I59fd3bd3cc58c3e15dfb6c5e46f303c5d4fd739c

Piecewise linear fit without activity masking on subset3 intra
and objective-1-fast inter, by simple linear regression.

In combination with 79c0f32c "Remove DCT from od_compute_dist_8x8",
this gives a even trade between perceptual and non-perceptual metrics.

av1_daala_dist_30f@2017-01-23T21:32:27.902Z
 -> daala_dist_scale10_30f@2017-01-31T21:52:07.635Z

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
2.1080 |  2.9645 |  3.4697 |  -2.2086 | 0.2541 | -2.5232 |     2.1645

Piecewise linear-quadratic fit with activity masking, by same method.

The total effect of activity masking and daala-dist changes, with PVQ:

av1_pvq_5f@2017-01-31T01:05:24.219Z
 -> 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
22.5041 | 42.6349 | 40.8516 | -10.3510 | -6.8030 | -16.9057 |    21.2613

Change-Id: I9b513509a03aa058dc5c1479c01d62c8fc363a34