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This experiment has been adopted as it has been cleared by Tapas.

Change-Id: I0682face60f62dd43091efa0a92d09d846396850

Earlier, intra prediction for rectangular blocks was performed by
running two steps of prediction on square sub-blocks.

With this experiment, we do proper intra prediction for rectangular
blocks. This ensures that we make use of all available neighboring
pixels especially for directional modes. For this, all the intra
predictors were updated to work with rectangular transform block sizes.

Performance improvements are small but free of cost:

All Intra frames:
lowres: -0.126
midres: -0.154

Video Overall:
lowres: -0.043
midres: -0.100

[Could not get AWCY results due to a backlog.]

BUG=aomedia:551

Change-Id: I7936e91b171d5c246cb0a4ea470a981a013892e6

This was being worked around by forcing highbitdepth to be off when
enabling tx64x64.

With the fixes, removed the work-around.

Change-Id: I3102f9e17d4037af96a9eff418c5af6a97fd740c

As the block sizes are powers of two, we can index into the weights
array as sm_weights_array[bs] now.

This uses 2 * MAX_BLOCK_DIM memory, instead of NUM_BLOCK_DIMS *
MAX_BLOCK_DIM earlier.

Change-Id: I55bcedc188b8ed7def719c4d002c1fe2ec5e1b7f

Change-Id: Ia6707cf50441f757fb053daeae85fb2d0c9b135e

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

Directional predictors for 45, 63 and 207 angle had 2 or 3 variants
each, and only one of them was actually being used. So, removed the
C, sse2, ssse3 and neon versions of the unused ones.

Updates to the test:
- test_intra_pred_speed was testing the unused versions, so changed
  it to use the version actually used by code. This meant updating
  some golden MD5 values.
- test_intra_pred_speed was NOT filling up bottom-left and top-right
  pixels randomly, so the predictors using these pixels weren't tested
  properly. This was fixed.

BUG=aomedia:442

Change-Id: I09725d593408b81e0cd636e70a88c28eea5f2222

Rename '--enable-aom-highbitdepth' to '--enable-highbitdepth'

Change-Id: I1de13c3508c30c552532993419d8ace326142ab6

Apart from being inefficient, the floating point operation log2()
was resulting in an assertion failure due to an unrelated floating
point exception that happens earlier.

Related: update the MD5s in test_intra_pred_speed to fix that failure
too.

BUG=aomedia:384

Change-Id: I18dc0733e880bac21b3d07ad874f8ae341f59f06

Use 255 instead of 256, to restrict to 8-bits.

Only noise level differences in performance.

AWCY:
                   High Latency     Low Latency
  All Keyframes    -0.01            -0.01
  Video overall    -0.01            -0.07

Google Set:
                  All KF            Video
lowres            -0.005            -0.029
midres            -0.008             0.028
hdres             -0.010            -0.022      

Note: By moving from 18-bit to 8-bit and then
cutting off at 255 (this change, overall effect is
noise level too (neutral or better).

Change-Id: I9f2852023015e36c01203bafe486ec400b2ba46f

Using 8-bit weights gives similar results as 12-bit, with only noise
level difference. Here's what 8-bit looks like compared to 12-bit:

* AWCY Objective-1-fast:
                          high latency          low latency
ALL keyframes             0.00                  0.01
Video                     0.00                  0.04

* Google sets:

All Keyframes:
lowres: 0
midres: -0.001
hdres: -0.001

Video overall:
lowres: 0
midres: -0.063
hdres: 0.026

Change-Id: Ibed6015aa7cce12fcc6f314ffde76624df4ad2a1

Compression performance is roughly neutral:

AWCY:
-----
                 High Latency     Low Latency
  All Keyframes  0.00             0.00
  Video overall  0.01            -0.01

Google sets:
------------

- All Keyframes:

  lowres  -0.001
  midres   0.000
  hdres    0.001

- Video overall:
  lowres   0.019
  midres   0.000
  hdres   -0.013

Change-Id: I89be2739203bf3e2848e4ba7ae2988c625f54513

Insignificant change in BDRate.

Change-Id: Id1aa798393fd4c4c174dfcb9a8315828b531996f

2nd set of weights can be derived from the 1st.

Insignificant change in BDRate.

Change-Id: I68d6fc256f532d52573583f121dd28fd8913ce3a

Provide primitive modules for cb4x4 mode use. This resolves compiler
warnings when both high bit-depth and cb4x4 mode are turned on.

Change-Id: If6ecac50578b3e665b602419a0701c3e047ce623

This commit fixes the 2x2 d45 intra prediction. It avoids the use
of out-of-boundary position as reference. This resolves an enc/dec
mismatch issue in cb4x4 mode.

Change-Id: I93d01536a0c004190cc9fe3c724bf41364f6fdde

This is added as part of ALT_INTRA experiment.

This uses interpolation between top row and estimated bottom row; as
well as left column and estimated right column to generate the
predicted block.The interpolation is done using a predefined weight
array.

Based on experiments, the currently chosen weight array was created
to represent a quadratic curve, but can be tuned further if needed.

Improvement from baseline on Derf set:
ALL Keyframes: 1.279%

Improvement from existing ALT_INTRA:
ALL Keyframes: 1.146%

Change-Id: I12637fa1b91bd836f1c59b27d6caee2004acbdd4

Change-Id: I2536b5b55f28c2ee59445c3b70d3e073e69945cd

Cherry-pick Daala b5020bee:
 Remove redundant test in od_ec_decode_bool_q15().
Using a test that decodes 100M random binary symbols, making this change
 produced a speed up of 8.81% with gcc-4.9.3 and 3.71% with clang-3.7.1,
 both compiled with -O2.

Change-Id: If6d0077a56121a575ae53bcd4d1d9b7d800a317d

Change-Id: Icda975cd9b264c1752c3057bce8031791f91c08a

Change-Id: Iaa25269a15231dadeaba0f4836c864fc10e858df

Add 2x2 DC, V, H, TM intra predictors.

Change-Id: I2a614adde553f821c45bc5a9bf09800a9f0aaa26

This commit merges the fix of oddities in several intra prediction
modes.

Related tracking issue:
https://bugs.chromium.org/p/webm/issues/detail?id=1043
Original libvpx commit:
c7dc1d78

Change-Id: I4e2d0c2514a34b498453dcd4be2e6e4430d7373a

This reverts commit 4df11c7f.

Change-Id: I328b884dff690a4c7909f4cb2ceeaf0134c37ac2

This commit merges the fix of oddities in several intra prediction
modes.

Related tracking issue:
https://bugs.chromium.org/p/webm/issues/detail?id=1043
Original libvpx commit:
c7dc1d78

Change-Id: Idbf65e07280848459bfffdefac3c252eef2a1274

This minimize code differences between AOM master and nextgenv2

Change-Id: If144865bdf3ef0818e7aac11018b9e786444c550

When the experiment is ON, we use Paeth predictor instead of TM
predictor.

For derf set, this gives about 0.09% improvement overall, and 0.55%
improvement if all frames are forced to be intra-only.

Also, if the EXT_INTRA experiment is also on, the improvement overall
is 0.056%, and improvement if all frames are forced to be intra-only is
0.465%.

Change-Id: Id74e107ede70a8d2107fa14fcb3f44b23a437274

Cherry-Picked the following commits:
0defd8f2 Changed "WebM" to "AOMedia" & "webm" to "aomedia"
54e66767 Replace "VPx" by "AVx"
5082a369 Change "Vpx" to "Avx"
7df44f17 Replace "Vp9" w/ "Av1"
967f722f Remove kVp9CodecId
828f30ce Change "Vp8" to "AOM"
030b5ffc AUTHORS regenerated
2524caee Add ref-mv experimental flag
016762be Change copyright notice to AOMedia form
81e55269 Replace vp9 w/ av1
9b94565b Add missing files
fa8ca9f2 Change "vp9" to "av1"
ec838b76  Convert "vp8" to "aom"
80edfa01 Change "VP9" to "AV1"
d1a11fb9 Change "vp8" to "aom"
7b582513 Point to WebM test data
dd1a5c8d Replace "VP8" with "AOM"
ff00fc0f Change "VPX" to "AOM"
01dee0bb Change "vp10" to "av1" in source code
cebe6f0c Convert "vpx" to "aom"
17b05679 rename vp10*.mk to av1_*.mk
fe5f8a8a rename files vp10_* to av1_*

Change-Id: I6fc3d18eb11fc171e46140c836ad5339cf6c9419

Manually cherry-picked commits:
ceef0583 libvpx->libaom part2
3d26d916 libvpx -> libaom
cfea7dd7 vp10/ -> av1/
3a8eff73 Fix a build issue for a test
bf4202ed Rename vpx to aom

Change-Id: I1b0eb5a40796e3aaf41c58984b4229a439a597dc

Change-Id: Ia3f96910409be4ae8a4907a2f0dee73b1af8f93d

Change-Id: Ibc7933fba85feeb30ef9b14b302d932aff19f54e

Change-Id: I62234260e2d2de94d602c6d8095c8f8124334052

the results along the top and left border are then stored with a moving
window into the vector.
~40-67% faster on ARM, ~40-77+% on x86 depending on the block size.

Change-Id: Iab369aa2946a3ae4eb7290d512868fe5db92dbc8

Temporaly disable warning for unused function for vp10, needs clean
out the warnings before re-enable the flag for vp10.

Change-Id: I5636f8cd607423f6ea6963db9c2cbd688e30b495

high-bitdepth version
d207e, d63e, d45e are only used with CONFIG_MISC_FIXES

cherry-picked from libvpx:
cdf1077d intrapred: protect functions w/CONFIG check x2

Change-Id: I77292e11f51fd76d4127fd0027f876866bcf8675

high-bitdepth version
d207e, d63e, d45e are only used with CONFIG_MISC_FIXES

Change-Id: I77292e11f51fd76d4127fd0027f876866bcf8675

d207e, d63e, d45e are only used with CONFIG_MISC_FIXES

cherry-picked from libvpx:
fea27ccc intrapred: protect functions w/CONFIG check

Change-Id: If13946e483c4d0ccaa3e1d60dc14216c06d5a219

Change-Id: I24d415bafe617eac894427088d7b2fbe0b7e04d7

Change-Id: Ib8c9eb6263d6eba6b9d7b2e402b7e83a78c86be9

d207e, d63e, d45e are only used with CONFIG_MISC_FIXES

Change-Id: If13946e483c4d0ccaa3e1d60dc14216c06d5a219