This patch made several changes.
1. Removed writing large_scale_tile bit to bitstream.
2. Created SET_TILE_MODE API in decoder to pass in tile coding mode
information.
3. Modified related unit tests.

BUG=aomedia:1204

Change-Id: I2d729afba8b1b9278543a5da154be7ae6c99d184

Order of IF statement reversed to ensure that
we don't attempt to access an element outside
the ref_mv_stack array.

Change-Id: I9568420ade271f11fe960b8ecddf9a2ea849a603

BUG=aomedia:1233

Change-Id: Ib740ee063b87003cf8c6cbd8f2ae4b917892e41c

Change-Id: I0156df138342be1f4ffa867a5e293887ff83e251

Change-Id: Ic357ba36525101310fa612916e04b5d46b513d54

Remove untouched code due to the differentiation on handling leaf node
and unifiy the duplicate code.

Change-Id: I93337a1a8a84dfd04c35b085d51ce40bbf1ecb60

Change-Id: I5100bce92f904e09b6067f5060dee5fdb3118933

In the decoder, the function get_tx_size_context() is called
by read_selected_tx_size(), *before* mbmi->ref_frame is set up.
This means that mbmi->ref_frame still holds the ref frames from
the previous block, and does not indicate if the current block is
inter or not.

Fortunately, all of the other functions called by read_selected_tx_size()
have an explicit "is_inter" parameter, which is set correctly.
So we can just plumb this through into get_tx_size_context().

Change-Id: I00f0f3704937f592ccc5d304ed20ee25196dd520

Change-Id: Ie9a331facd12a9d762ede09451f6d44b6b3ef795

BUG=aomedia:1231

Change-Id: Ibddf60bfbdd6ac037ca4d2fa9bbc2eb30841991b

Change-Id: I5e205150c62f07049187ddd61b670ad5197c1645

The auto-regressive model allows for different window shapes
and different lag sizes.

Although most likely to be used as a reference for modeling
noise in AV1, the model is currently parameterized more generally
than AV1 needs.

I will add an example (hopefully with a denoiser) in future
commits.

Change-Id: I1ba1067543601c2c01db4970d42766bb35da77f0

BUG=aomedia:1230

Change-Id: I8a66b6303752b77a09cca1fe6890137146c50d1e

BUG=aomedia:1236

Change-Id: I72c1e5ba7f0090c0831ca9aaccbc32dc4f1fdf4f

Change-Id: I25ae95ee7a02f5bd76e2bf91c41e7cdb87de0d85

Reduces cache misses in the decoder and hence reduces run time.
Run time reduction has been measured to be about 15% for HD (1080p)
content.

Change-Id: Ic42de04e0943c0f89c856b61fe174dcea96af5e5

Change-Id: Ic68c6e8d54782f47fe9d1d1775b861edeb52bf35

This change does affect encoder nor the bitstream

Change-Id: I516e4750c5df6cb0e288365f78dd4875510548f4

Change-Id: I861ccc09454606ce4172db02a52550f9b7a7800c

Static local functions.
Remove av1_ prefix for local functions.

Change-Id: I91cda7b6a1e09683ed70cd74e724db88ddf124dc

This is to exclude coding CFL for block sizes where it is normatively
not allowed.

Reuse the alternate CDFs from the --disable-cfl path.

This yields some improvement on subset1:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0113 | -0.2630 | -0.2138 |   0.0021 | -0.0110 | -0.0157 |    -0.0511

BUG=aomedia:1182

Change-Id: I1e5f23ef7f2debcf8edce788bfa63ec95db4a679

Change-Id: I3698acb824afc5d0f66c2d4a099403f07a373c86

Change-Id: I0d76adba7c5ea387a9c58076369d1eba89b0fbfe

Change-Id: I7776ccaecb6933af47253a15fa8ed8a53346fac1

Change-Id: I32b2ce4839c359891841385467cf532b1ebe4a59

The motion vector search result at single reference frame mode is stored
for later use. There are some issues in current implementation.
1. single_newmv is only stored for 1st ref_mv, but not for other ref_mv
values tested.
2. If single reference mode is skipped and not tested, single_newmv is
not available.
3. Interintra mode always use single_newmv as its MV, which may not be
available as mentioned above.
To fix it, we store single_newmv for every ref_mv tested. In interintra
mode, if single_newmv is not available, do motion search to find a MV.

This was revealed by a motion vector unit test failure.

BUG=aomedia:1190

Change-Id: I3e690587644d4c8c31337f37380b796a3d71a3f6

Test all possible sizes.

Change-Id: I042c7eef6d7af149885606c1085fac76f913671e

Because spatial_segmewntation uses segfeature_active() for all the
segments regardless of its delta_q value.

BUG=aomedia:1196

Change-Id: Ibcb7b6e42f703fa02d7cb95143c56f8078a9d475

BUG=aomedia:1215

Change-Id: Idc2d732e2574b61b5970d3fe9aa3723790a2be36

Change-Id: I545f126f6ba724ff4e41294353c4f11a47c6e853

The superres upscale process only generates cm->height many rows
of pixels, but we were previously using cm->mi_rows*MI_SIZE many.
The latter number are easily available before upscaling, but we
ideally don't want to have to upscale extra rows. So we switch
to only using cm->height many rows inside loop-restoration.

While making this change, I found and fixed an issue with
av1_get_tile_rect() when using horizontal subsampling + horizontal
superres.

Finally, note that this change does introduce an edge case which
isn't obvious from the source code. This has been annotated as a
comment in save_deblock_boundary_lines().

Change-Id: Ide2bd433d45baa0fb1198353d05eb21b9a903157

Properly support loopfiltering-across-tiles in combination with
superres and/or loop-restoration:

Upscale one tile column at a time, rather than doing the whole
frame at once. This allows us to correctly support the loop filter
across tiles flag, by temporarily extending the left/right boundaries
of each tile column to avoid sampling from adjacent tiles.

This code is also reused by striped-loop-restoration, when upscaling the
deblocked context above/below each stripe. That way, we i) ensure
that the upscaling is done consistently, and ii) fix the last remaining
case where loop-restoration didn't respect the loop filter across tiles
flag.

This also makes it easy to perform extension of the left/right edges
of the frame "as needed", so we don't need to extend the frame borders
immediately after deblocking. This should give marginally better CDEF
filtering for frames using superres.

Change-Id: I28712a177853a20c9eb2993e740da8ba7c95a8cc

Includes unit tests for conformance and speed.

SSSE3/CFLPredictHBDTest:
4x4: C time = 1436 us, SIMD time = 358 us (~4x)
8x8: C time = 4821 us, SIMD time = 598 us (~8.1x)
16x16: C time = 18528 us, SIMD time = 1793 us (~10x)
32x32: C time = 72998 us, SIMD time = 6400 us (~11x)

AVX2/CFLPredictHBDTest:
4x4: C time = 1436 us, SIMD time = 398 us (~3.6x)
8x8: C time = 4924 us, SIMD time = 644 us (~7.6x)
16x16: C time = 18624 us, SIMD time = 1617 us (~12x)
32x32: C time = 73509 us, SIMD time = 3635 us (~20x)

Change-Id: Icbcfefbf165facdbd77c9b3861af2bbf464254a0

Change-Id: I4b271259a2c29619ac7a066bedb958400187ac20

Change-Id: I30531cc37243c778210e776f93a82e0d078821f1

BUG=aomedia:1228

Change-Id: Iaa88810426bd7fe059ededf30956ffc57b897d62

This fixes a segmentation fault in unit test:
AVX2/CFLPredictTest.PredictTest/7

Change-Id: I173340965f465a82019167e0964b9901683b60a8

When the coding block size is above 64x64, process the YUV planes
in each 64x64 block unit.

BUG=aomedia:1055

Change-Id: If66f67514cc5de4a6cff94c9f74e335c241c8c9b

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

Change-Id: Ia2100f102de6d9d5a67ba7178a20a50202839636

Was forgotten when commited.
Happened only when temporal prediction was on.

Change-Id: I08c3f03f3442d0b0c6c9aa0bb2a3943dcdb303ab