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Change-Id: I9d3f0380865790d8adcb85f03305b193bc1949d7

This experiment has been adopted, we can simplify the code
by dropping the associated preprocessor conditionals.

Change-Id: I4705652ac8231ee25f960e8096dc97c2aeed1d20

This experiment uses switchable interpolation filter for intra
prediction. Current gain is too small to be useful for AV1.
May explore more for AV2 in the future.

Change-Id: I24ae8c75dc71adf6271eabdb68a81b68a0869fa2

Implement upscaler block by block to guarantee a fixed number of
output samples for each input block.

Change-Id: I302972d3711549b9e217ca2c052a55bd04d91dae

BUG=aomedia:901
Change-Id: I28165b5fbf712da02a609d8070a476f3b319a2c9

When the reconstructed coefficient is below the original coeff
in magnitude, skip the level down search for the given coefficient.
With fast-mode fix, performance change is within 0.01% level. The
overall clip encoding process speed is up by 10%-15%.

Change-Id: I93b68e494aa995faa3093fdfa1bda0bcb0e2564a

BUG=aomedia:733

Change-Id: I7044c55611a3ea9555347f9c4fef03e3042560e2

Reduce the needed memory space for motion field estimation.

Change-Id: I9caa228aa804a06370a34715a1c3463564d8d86b

Since BLOCK_4X16 and BLOCK_16X4 are listed with higher enum value than BLOCK_8X8.

Change-Id: I36cdd4d33dfb2f3a01fa03c8eb8be26d8055dc43

BUG=aomedia:900

Change-Id: Ifb6c437d8d2f309d0717fb50c402618475fe021f

Change-Id: Ie02e188662119ee2719c79283641b9b74849cfab

BUG=aomedia:909

Change-Id: I775c02df623a9ded5f04fcbbbb398f8e5d17a31a

Align all the motion vector storage buffer in 8x8 block resolution.

Change-Id: Iea786db95b2274332a755dc60f66510c068e3dc5

Change-Id: I4ce263b2731676e8620f0dbd1da2cd79bfded18c

Change-Id: If42a8cf9de9b4be14b4f228c5bf39747eefc168d

Also, simplify flow of control and avoid mutability.

Change-Id: I4e971b784b87c7240a83752499a1fbd48cfcb220

Support higher hardware throughput. The coding performance loss
as compared to 15-bit precision is 0.05% for lowres. The loss is
smaller as frame size goes up.

Change-Id: I2e22b156f3178cf63689df306e9da13e0e4d205b

Change-Id: Iefae7f84f8196bada91b8c5b10992967c6a66a11

Only noise level changes to PSNR U/V and bitrate observed, but this is
much more logical/consistent.

Change-Id: I31be92bbbb416b57f3a23f3da6ed2c9ac6a29955

Change-Id: Ic701ef1439d6d1d3d7801bb3ec4aebe9ad6e3acc

This mode introduces bug that causes lv_map having performance
drop when turning on optimize_txb in rd loop.

I will fix the bug and turn this back on.

Change-Id: I5d2f8d2f8e5b9529a2fd23f4679bcb16de259f73

Use just one tile for CDF backwards update.

Enable by default.

Change-Id: I0c89f87c16e5b24894f8cd3151efc5ad5aaecb49

BUG=aomedia:907

Change-Id: I30a0290e499d338250343b5f9092bdcabe7d867a

BUG=aomedia:906

Change-Id: I9cdcc5e5a7407858bb37cd93d748463ede9981b6

BUG=aomedia:658

Change-Id: I65ec5fcc369404b4fe468986973506b4e8caabcf

Change-Id: Ib4d6f43d174b8897419cada0d19bfb132353e169

Change-Id: I1269acec6c80c8c51c22b2adb4962bd1db646304

add AOM_ to UNUSED/*DEPRECATED to avoid conflicts with other
headers.

Change-Id: I644e55f66e67aff3d43086c75e2ac9a646e4450c

A compiler is allowed to optimize away the comparison because
it assumes that signed integers *won't* overflow.

Integer overflows can be more reliably detected using
the undefined behavior sanitizer from gcc/llvm, e.g:

$ LDFLAGS="-fsanitize=undefined" \
  ./configure --extra-cflags="-fsanitize=undefined"

See Issue 903 for an example.

Change-Id: Ia157910c72eeadf75975125349402b66c085c074

Change-Id: Ie52b2e32c2a0832655fd66f7f6c83cc1f2b13b4d

BUG=aomedia:862

Change-Id: Ide71432cb85858362360e3c4ae8404f75ff9ba03

While finding the reference MV for a block, if one neighbouring block's
motion mode is warped motion mode, instead of directly adding that
block's MV to the candidate MV list, we use that neighbouring block's
warped motion parameters to compute a MV for the center point of the
current block, and then add that MV to the candidate MV list.

Borg test result:
             avg_psnr ovr_psnr ssim
cam_lowres:  -0.507   -0.514  -0.685
lowres:      -0.114   -0.122  -0.180

The change is added under ext_warped_motion config flag.

Change-Id: I3ce6290a1fd512b613eab5d7620c8bcb08f189a6

Make fi mode index entropy coded instead of using raw bits. Mode
cost estimation in key-frame RDO is updated as well. Modification
to inter frame RDO is not included in this patch.
Also key-frame y mode cdf table is re-trained since fi modes are
attached to DC_PRED

Key frame BDRate:
-0.399% lowres, -0.339% midres

Change-Id: I9ccf478b0a2e48fb1870fe8451e45e2c858a5f63

Align the output of prob optimizer with what is needed by intra
coder.

Change-Id: Icdecb33240a5691c8c292946faa00d0bfebee742

This patch modifies the interpretation of SEG_LVL_SKIP and
SEG_LVL_ZEROMV slightly, to fix a decoder crash and to save bits
in the intended use cases of these segment flags.

Previously, blocks using either of these segment flags could
signal reference frames just like any other block. But the mode
was implicitly taken to be ZEROMV. This worked fine in VP9, but
crashed for compound blocks in AV1 since those should use
ZERO_ZEROMV instead.

Now we make it so that SEG_LVL_SKIP and SEG_LVL_ZEROMV imply
that the block is single-reference. The reference to use is taken
from the SEG_LVL_REF_FRAME segment feature if that is present,
or is set to LAST_FRAME if not. See the attached bug report
for the reasoning behind this.

As a related change, we also teach the encoder how to deal with
the combination of SEG_LVL_SKIP + SEG_LVL_REF_FRAME.

BUG=aomedia:675

Change-Id: I5e657cbfc1f08395a0301cba701edfb1682502a5

This fixes a number of segmentation faults.

BUG=aomedia:874
BUG=aomedia:658

Change-Id: I9d1c549e9c7d44a03c5b1b35e8de389c085d95b8

BUG=aomedia:900

Change-Id: I9ca596f677e174ccd12a6e4eb927733d25e76f58

Change-Id: I6d24382fe9afbc86068e56e55d5a495ced57b9a0

BUG=aomedia:898

Change-Id: I5c3eb62407c8025650d4023dd408674381312d26

BUG=aomedia:899

Change-Id: Ia216eb8a7b1ef21a2643055816eada98cfb5d41a