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objective-1-fast results:

sequence       PSNR    PSNR HVS    SSIM    CIEDE   APSNR   MS SSIM VMAF
average        -0.02    0.01       -0.02   -0.03   -0.02    0.00    0.06
1080p           0.02    0.01        0.03    0.00    0.01    0.02    0.09
1080p-screen   -0.32   -0.28       -0.32   -0.44   -0.31   -0.27    0.00
360p            0.06    0.14        0.10    0.10    0.08    0.11    0.22
720p            0.00    0.04       -0.05    0.01    0.00   -0.01   -0.10
wikipedia_420  -1.04   -0.95       -1.05   -1.30   -1.03   -0.88   -0.29

Change-Id: I30ce8a869daf1c3ed539ffed552786cbb785e7d0

Partial revert of "Remove encoder speed 8 in AV1"
6c29f464.

Change-Id: I474e26700047854353347ce97cc7d545e3ca0642

Change-Id: I9fdf3b543a00700d47b3012b3de7b30ae455900f

Adds sanity checks to methods that should only be called for intra
blocks.

Change-Id: I34b24dbb24f6d35ff42bbdf31d29eef2980a05b4

BUG=aomedia:455

Change-Id: I97ecab4f01417734c83a9b8886f145236c9b38a5

Use 2x2 inter prediction for chroma component. This improves the
compression performance by 0.6% for lowres.

Change-Id: If9d98e49cee63f40085b179652bfacc31ff462ea

This fixes a warning about unused computed values when
CONFIG_HIGHBITDEPTH is 1.

Change-Id: Ibf1076c4838f750da4a1b940b550ef8ecac6ba02

Adds three new helpers and changes one other. The intention of this is
to make the triggering and function of resizing simpler. The new process
is to resize to the next state and then update the current state to
match. The new helpers reflect this change and make the overall flow
simpler.

resize_pending is now a helper instead of a member, so it doesn't need
to be raised manually. A resize is pending when the numerator or
denominator of the next resize state is different from the current one.
resize_pending could be 1 (scale down), 0 (no change), or -1 (return to
original resolution if 1-pass CBR), but now it can only be 1 or 0. To
return to the original resolution just set the scale to 1:1. This
reduces complexity with no change in functionality.

resize_unscaled just returns 1 if the current numerator and denominator
are equal. This makes some if conditions cleaner.

resize_step makes the current scale equal to the next scale. This
signifies that a resize is complete and will cause resize_pending to be
false until the next state is changed. This is the end of the new
resizing procedure.

av1_calculate_coded_size has been changed to calculate the next size
instead of the current size. The current state can't be updated until
the resize is complete because if it were, the resize_pending state
would drop and the resize wouldn't finish. This just means the next
resolution is the target resolution until the resize is complete.

Change-Id: I5d5855cc83f532d3a8b1f8853ba70a0d43221fbf

The element of "idx" in the data structure of RefBuffer is a
connection between AV1_COMMON::RefBuffer and
AV1_COMMON::BufferPool::RefCntBuffer.

It is being used currently in many places in both the encoder and the
decoder. "idx" is not only used to track whether a reference buffer is
alive, but also serve as the connection to RefCntBuffer which contains
info that RefBuffer itself cannot access.

Change-Id: I5ccdb9c2afe840d04a025da359a704f5fc216ddd

BUG=aomedia:442

Change-Id: I98ada843016d0dd046f89bbcb2e9ae72442a101e

Warped_motion doesn't go through inter_predictor() function to
generate prediction where convolve_round is activated.
Therefore, we could avoid doing post rounding when the
warped_motion mode is on.

We use do_post_rounding to indicate whether post rounding is
needed
Change-Id: Ib17a0c0d4e6e5232e9682afa8cfdb9576f5cf4c0

* Change ref parameter to use LAST FRAME instead of
 previous frame, which makes it consistent in
 enc/dec for tempmv_signaling.

BUG=aomedia:511

Change-Id: I02f1101623b7b3b09cd4d3f2977e9503b95818ec

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

This has been taken care of already.

Change-Id: I0198fdbcd48fc355013de79644513279c8acb0de

* Add tile dependency support when ext tile enabled.

Change-Id: I8fe40adf285e171b5b761b15590a8b1c6758b8f7

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

- 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: 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

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: 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