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The prediction block level DC_PRED is stored and computed as double
instead of int.

Change-Id: I22766c102a7b62d4b5e7621438185808cc0ea8f4

CFL is disabled when skip_chroma_rd is enabled. This is done by reusing
the logic in CB4X4. To facilitate integration, the skip logic used in CfL is
moved inside the read/write functions.

Results on Subset1:
master@2017-05-08T19:54:48.196Z -> cfl_baseline@2017-05-08T20:06:55.292Z
  PSNR |  PSNR Cb |  PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.2668 | -12.0951 | -10.4138 |   0.3095 | 0.2998 |  0.2831 |    -3.6579
https://arewecompressedyet.com/?job=master%402017-05-08T19%3A54%3A48.196Z&job=cfl_baseline%402017-05-08T20%3A06%3A55.292Z

Change-Id: I45644baa1aceef5ad4da3332fcb10f3fbaac052b

Change-Id: I30b1367b8f1417abb36f80ea634036af48afa0ae

This has been taken care of already.

Change-Id: I0198fdbcd48fc355013de79644513279c8acb0de

* Add tile dependency support when ext tile enabled.

Change-Id: I8fe40adf285e171b5b761b15590a8b1c6758b8f7

Reduce number of video frames used in tests

BUG=aomedia:506

Change-Id: I96ccdd69870d4ad9f56f7899be3c4ffe4e6e0943

For multi-thread encoding, previously the encoder buffers are
allocated at every frame, but only freed at the end of encoding,
causing memory leaks.

Change-Id: Id0e9d7fba8330e82be9cec1d42b7d4b017b8d772

Change to use 10 frames only in BorderTest instead of 40 frames, to
reduce time needed for tests.

BUG=aomedia:506

Change-Id: Ia176eb3f643d007fa4d1c5fc182f16d3e7cdf700

Change to use 15 frames only instead of 100 frames, to reduce test
time.

BUG=aomedia:506

Change-Id: Ib7cf48d2629e8d920f2c2b12820845618d6d58d7

Change to use 3 frames for screen content test from 10 frames, to
reduce test time needed.

BUG=aomedia:506

Change-Id: Ic7b44be6f3f2b65e7035bdcf24794b814b239ad1

- Function level improvement:
functions      sse2  avx2  percentage
idct16x16_256  365   226   38%
idct16x16_38   n/a   136   n/a
idct16x16_10   171   110   35%
idct16x16_1     34    26   23%

- Integrated in AV1 for default scan order.

Change-Id: Ieb1a8e730bea9c371ebc0e5f4a748640d8f5e921

This experiment extends ALT_INTRA by adding two new modes:
smooth horizontal and smooth vertical.

Improvement on *intra frames* in BDRate (PSNR):
===============================================

AWCY (high latency): -0.46%
(Also, -1.0% or more on PSNR Cb,Cr and APSNR Cb,Cr).

AWCY (low latency): -0.43%
(Also, -0.88% to -0.94% on PSNR Cb,Cr and APSNR Cb,Cr).

Google sets:
lowres: -0.454
midres: -0.484
hdres:  -0.525

Improvement on *video overall* in BDRate (PSNR):
================================================

AWCY (high latency): -0.15%

Google sets:
lowres: -0.085
midres: -0.079

Change-Id: I9f4e7c1b8ded1fe244c72838f336103ccc715d50

BUG=aomedia:518

Change-Id: Ia88b50b084c6370073ac4916e00a019963cf0254

When a block only contains 2 unique colors, there's no need to run
K-means, as 'lb' and 'ub' can directly be used as the centroids.

Two benefits:
1. Encoding will be faster for this special case, and
2. Can potentially avoid sub-optimal/duplicate centroids generation
(due to integer rounding) when 'ub' and 'lb' values are very close.

Change-Id: Ice04fc8577e3cc8c74f87d623a16ac8de3257cdd

Change-Id: Ibd7091d444cfb3095ddb938100704d3b75cf1af4

Also includes a change in the wedge primary functions providing
a slight improvement.

Change-Id: I536d3209f59624e23128708e29fa85c1e6fcd97e

Since the size used with cfl_load can either be based on the transform
block size and the prediction block size, width and height are used as
parameters instead of TX_SIZE.

This resolves a problem where cfl_compute_alpha_ind was reading
uninitialized memory.

Change-Id: I187dbdd5b2e8bd85e82bb77eb74859bee2cd3f1e

This will improve the lowres performance by 0.1%
No significant change on midres and hdres

Change-Id: I0c6e69bf48596e7e5ad49631ed9f9be73bbf3c9a

Change-Id: I48a2148854e2abd0a3cc66aef58bb6a5d77c8b59

Change-Id: Ieeb044d2b008c409faf7fa5d7253ad2d8f326ca4

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

Change-Id: Iecf11b2ca3636042ba70800dd8f6c62627760243

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

Change-Id: Ia56bdc8da422e9de9b92f357c98ad38017e8b728

This reverts commit 9395b34e, because it
did not have any effect in eliminate ubsan warnings as intended.

Change-Id: I9221385217f062a0356fe0c68643b12751048f69

Even though number of unique colors in a block may be at least
PALETTE_MIN_SIZE, sometimes the K-means can generate fewer than
PALETTE_MIN_SIZE unique centroids due to integer rounding.

This was resulting in "k - PALETTE_MIN_SIZE" being negative and using
that as an index into palette_y_size_cost array was causing a UBSan
error.

BUG=aomedia:515

Change-Id: Ia00b4bb2efebbe43d1fec7b619ebb837b1ae961c

Change-Id: I64c523a34b4d69450759433e125a79e63d928037

math.h provides these with _USE_MATH_DEFINES

BUG=aomedia:500

Change-Id: I6e05b09149a6a6ca152e67194b629e0728bc3c35

add correct type for 'c' parameter

BUG=aomedia:500

Change-Id: I4ea2334405d8d7ea436bc373dd1c812666f98067

Measure SSE for all possible alphas.
Estimate rates for alpha signalling.

Change-Id: Idf1e3c632925cd306090fc38cf5b95eff7ee5c1c
Signed-off-by: David Michael Barr <b@rr-dav.id.au>

Change-Id: I7b26893e9358378f585a892854812ed0a1888385

The small multiplier intentionally introduces a larger error, so
relax the accuracy threshold in the aom_reader_tell_frac() test.

Change-Id: Ib046a95dd3a8498a1a2ea58680796e75fd195868

Change-Id: Iad3c54cc905a7d337766c3c8ae59109327d5c5ae

Change-Id: Ib6f8b94c82fee8546d741f4472f42c342cbdd55c

BUG=aomedia:514

Change-Id: I97e20524b091169635395098efe234a7fd846bd9

'const_above_row' was same as 'above_row' and 'above_row' pointer was
never modified.

Change-Id: Ib0c2524b1afc75967cfa7d3da8e59cfc66299ff4

Change-Id: I6f0c93fd38abc85553b81a3f2d99e97ed9c803f7

Change-Id: Id490c57df5dca13c59a62b0a542779784842944c

The CDF initialization needs the iCDF macro wrapper.

BUG=aomedia:517

Change-Id: I2dd7c43ee2765f97c2fb247c31440e79587723fe

BUG=aomedia:516

Change-Id: I0af6e5e20f785bd4862f499b8d53002f58677c40

Adds a speed feature to control which references to use
to compute global motion.
Also adds logic to not compute duplicate sets of
parameters when reference frames point to the same
buffers.
Includes some renaming of functions to set good speed
features to make things clearer.

Change-Id: I641d33441fde98af18cad8d4db49cf7d5d153ead

Intra weights start from a higher value, and decay faster
Improve interintra by 0.1%/0.17% on lowres/midres

Change-Id: Ib20f47d1e89f729731e3bcfceaa21a47c8b45c56