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Add function get_binary_prob_new in aom_entropy_optimizer.c.
This function add "+1" to both 0 and 1 counters such that it won't
generate extreme probability when both counters are small

Change-Id: I759d6e1cfedaf1c36281b523c26e7a7d1cad147c

When deciding whether the top-right or bottom-left blocks are
available, we currently always act as if we're using 128x128
superblocks. This means that, when using 64x64 superblocks,
we sometimes conclude that blocks are available when they haven't
been decoded yet!

This typically happens at, for example, mi_row=15, mi_col=16
(for bottom left), where we're at a 64x64 boundary but not
a 128x128 boundary.

This patch fixes the issue by checking based on the signalled
superblock size.

Note: Most of this patch is just threading 'cm' through the
intra prediction process, so that we have access to cm->sb_size
in has_top_right() and has_bottom_left()

Change-Id: I126964c510aafffc870e7cd8b3e64a46abb14b3a

This patch is designed to complete the CONFIG_MAX_TILE experiment.
It adds the following features:
- Explicit tiles of same width can be signalled with command line --tile_width
- Explicit tiles of same hieght can be signalled with command line --tile_height
- max_tile now works with the depenedent horizontal tiles experiment
- additional checking added to ensure maximum number of rows/columns <= 64
- one fix to the tile group code for when the number of tiles is not a power of two

Change-Id: I749a68fdb3dcdd8d1ced2b3558f3817e4b832c06

inside the encode_super_block function, the tx_size decision logic is
different in the dry_run==0 and dry_run==1 case when segment is
lossless. this change fix the inconsistence.

BUG=aomedia:819

Change-Id: I2f4c5434d8c4ef722ac885a1ffd2d253863ae6d9

This fixes decoder's capability to start decoding
bitstream from non-KEY intra_only frame.

BUG=aomedia:816

Change-Id: Iecd5add418590119f59a51acd7208eb08cb17042

Add lowbd unit test functionality to intrapred_test.cc
Function speedup against C (i7-6700):
Predictor   DC     LEFT   TOP    128
4x8        ~1.4x  ~1.4x  ~1.7x  ~1.9x
8x4        ~1.2x  ~1.6x  ~1.6x  ~2.6x
8x16       ~1.4x  ~1.3x  ~1.4x  ~2.1x
16x8       ~2.0x  ~1.8x  ~2.3x  ~2.1x
16x32      ~2.0x  ~1.9x  ~1.8x  ~2.2x
32x16      ~2.0x  ~2.0x  ~1.9x  ~2.2x

Change-Id: I33db512020ca3c6853a9205a8079f3d00134f584

Since Subsampled values are in Q3, one does not need to take the
average, as the sum of 4 values is the average in Q2. As such, shifting
by 1 to the left, results in the average in Q3. By removing the
intermediate step in Q0, rounding error is removed.

Results on Subset1
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0204 | -0.1945 | -0.1474 |  -0.0170 | -0.0237 | -0.0178 |    -0.0973

https://arewecompressedyet.com/?job=cfl-baseline%402017-09-06T17%3A41%3A38.041Z&job=cfl-NoAverageInSub%402017-09-06T17%3A59%3A00.035Z

Change-Id: I8c6d4f71ec0e6e3923e254d79b83127b3734699e

Result from luma subsampling is left-shifted by 3. This avoids having to
do it during averaging, in alpha search and when building the
prediction. This change does not alter the bitstream.

Results on Subset1
  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0000 |  0.0000 |  0.0000 |   0.0000 | 0.0000 |  0.0000 |     0.0000

https://arewecompressedyet.com/?job=cfl-baseline%402017-09-06T17%3A41%3A38.041Z&job=cfl-SubsampleQ3%402017-09-06T17%3A42%3A01.252Z

Change-Id: I6e89eac6496f7c36e46364c9223fbcbca6759032

Exactly one of tmp_dst/tmp_dst_/tmp_dst2 is used in a call to
av1_make_masked_inter_predictor. Work out how many bytes are needed by
the largest one possible and just allocate that.

Change-Id: Ib8fabaf1f461ce1192c5657a3d2b5a4f7fa8d7b1

When calculating the above overlapped prediction, we adjust
xd->mb_to_bottom_edge to have the correct value for the prediction
we're about to make. This prediction is half the height of the
current block - *unless* the block is 128 pixels high, in which
case the prediction is only 32 pixels high.

This patch implements the special case for 128-pixel high blocks.

(all of this applies analogously for left predictions too)

Change-Id: I2780e8d4a6f8a9f82f540f2c2dfde691d07298e2

Change-Id: Id6f588876b1adf68abd8c17d7eef2223d552e457

BUG=aomedia:812

Change-Id: I635d620fc6d350391ecb7885cc119eaef0af39bc

Only use cm->mi, instead of cm->mi_grid_visible to get filter level.
The latter may not work for shifted grid loop filtering.

Change-Id: I55ed6a42f0abb19d6814e8c0cf8d64ce79bf6abc

Set filter step = 2, such that 3 bit can represent [-14, +14] filter
level difference.

Tune threshold for reusing filter level between previous and current
superblock.

Change-Id: I6f26377591f3e93f7c068e4aa4279ae9bc2c9522

We extract these functions in order to move them to the cfl_store in a
subsequent commit. This change does not impact the bitstream.

Results on Subset1 (compared to parent with CfL enabled)
  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0000 |  0.0000 |  0.0000 |   0.0000 | 0.0000 |  0.0000 |     0.0000

https://arewecompressedyet.com/?job=cfl-inter%402017-09-23T20%3A51%3A01.093Z&job=cfl-extract%402017-09-23T20%3A54%3A15.693Z

Change-Id: I84bfe60e25a4a665f686d6b18789395a50318a9b

Based on code change in:
https://aomedia-review.googlesource.com/c/aom/+/21140

Change-Id: I771ba6e08259e1c43cb06ebe6436dafe07fdf1d5

Alpha sort the experiments group in
aom_config_defaults.cmake to avoid future duplication
issues, and:

- Remove ALTREF2.
- Remove the duped CDEF line.

BUG=aomedia:813

Change-Id: Ib14172c89dd3934dbf475bbfc581d017acdba2d8

Change-Id: Iee4957038d61c14cf8fa3f9c094b579c82c20603

PVQ has been broken again since the experiment flag for palette is removed
in commit c6300aa1.

As a fix, if PVQ is enabled then disable both of --tune-content=screen and
automatic detection of screen and use of palette coding tool.

Change-Id: Iea6bb042b4402163805c44dabfb3f4c05dfd4e23

Change-Id: I4d6912f3a0df0bdb3f435cc8057b63fbaa3aaa6d

Like for intra block in intra frames, an extra call to
txfm_rd_in_plane is added to the RDO of intra blocks in inter frames.
This extra call is performed using the best parameters found during
RDO and the reconstructed luma pixel are stored.

Results on objective-1-fast (compared to CfL on Intra frames only)

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.2497 | -3.5526 | -3.5048 |  -0.2456 | -0.2392 | -0.2508 |    -1.4811

https://arewecompressedyet.com/?job=cfl-no-inter%402017-09-13&job=cfl-inter%402017-09-13T14%3A13%3A13.918Z

Change-Id: I70ea2c01859b6c55d7c3eb9680d492c0bfc2aad4

The subtile and clamping features are no longer used. This patch
removes the dead code that implemented them and the parameters to
support them.

It also changes the return format. Instead of having return type void
and passing data out through 4 output pointers, the function now just
returns a RestorationTileLimits structure. Since the function is
defined inline in a header, I suspect that most callsites will
actually compile to identical code.

There should be no functional change from this patch.

Change-Id: I6ebc4da66a00676bd988f939a4b4957f743e8004

This patch basically just pushes #if CONFIG_HIGHBITDEPTH down past
other #if/#endif blocks, letting us pull out common code instead of
having to repeat it. There should be no functional change (indeed,
there should be no change except whitespace after preprocessing!)

Change-Id: I9bcbfbdec5ad54e42095de085df381e85bf48197

rem_bits-1 not rem_bits should be transmitted so that
2 cannot be coded in two ways.

 BUG=aomedia:811

Change-Id: Iaa0203214bbe6fc6775e05fe4b6e976d568f54b3

For each superblock, its filtering range is shifted up and left by
8 pixels (half of the maximum loop filter length), such that
estimation of deblocking filtering will not cross two superblocks.

Change-Id: I82244b7c26ab8b2ac553037b3bb1fe1d82bf5704

Signal one bit to indicate whether current superblock reuses filter
level of previous superblock.
Try filtering and compute sse using previous filter level and search
the best possible filter level. If their diff is less than predefined
threshold, current superblock reuses previous level. Otherwise,
signal the best filter level.

Change-Id: Ibf125860883b774ef2464b62bb8b799b48258c64

The compressed header is now used only when the refresh
type is set as forward, i.e. in error resilience and
frame parallel modes. As long as backward updates are
used the header is disabled thereby saving bits.

Change-Id: Iee9f66ffbd30ef3552ea41b75e4b51537cd9ff97

Change-Id: Ifb0e4363136779092fcf5e9b27318f1b83df7ad7

Change-Id: Id721adcec7bd260f05690ee26890dd1180a74784

BUG=aomedia:818

Fixing "NIghtly test "AV1/ResizeCspTest.TestResizeCspWorks/0" fails"

The flag was accidentaly turned on in the commit
c00769a9.

Change-Id: I9d7102022fddedc9a3e35ae8086159f06067d21c

Change-Id: Ia58759dec0c6d5e5d0e91166e2abf5204c3217f3

Use them to simplify the body of compare_img in encode_test_driver.cc.

Change-Id: I4fbb4e67917f61f224e3d1b1a6970d10fc3cd777

Change-Id: I3209d0074bf3ed1fda260dc2f5cacbfa616ad6ae

We calculate eob cost in the end of the outer for loop
However, The continue statement from br_node may lead to ignoring
eob cost

Change-Id: Ic80c88e034836eb4dc4ac8b87bf0b7b45bf5d097

This is for reduce memory usage for adapt_scan
The whole change will be under the flage USE_2X2_PROB

Change-Id: If7839d6396dad7618155ef2f36896d17743696ce

Change-Id: I88e425c55b61629430078e11b5b94bac164d027e

Removes setup in compressed header so that the compressed
header can be skipped.

Change-Id: I8d7ed63944a4f75704222f4ad7d0159db1cec0d1

Change-Id: I3d6a440b13473b0d1e8b18c6629c7e8e3fb446ae

Improve dist-8x8 when computing 8x8 yuv dist for sub8x8.

To apply dist-8x8 for sub8x8 partitions, once mode decision for
sub8x8 partitions are finished then dist-8x8 is computed on 8x8 window.
Since dist-8x8 is only for luma, chroma distortion should be identified.

Previously, it has been hard to be free from potential bugs doing this,
due to the complex inter mode search code.

The new method is less-error-prone, which computes uv distortion (in MSE) after
the mode decisions for all of sub8x8 blocks in a 8x8 window are finished,
when the dist-8x8 distortion for luma 8x8 pixels are computed with
new distortion metric.

All the code separating y and uv distortion in inter mode search has
been removed in this commit.

Change-Id: Ieaccb7915df5faeb5e89a7e70b2b7cbac65231af

This patch moves the sb_size to the keyframe header from all frame
headers as discussed in the AOM Codec WG meeting.

Change-Id: Ia0190e57b36b98e51ab61ad4ff14f24f9c294877