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This reverts commit 79b78b7d.

The transform coefficient range needs some more tuning.
Before we finalize on that front, directly applying clamping
would cause multiple unit test failure issues. Hence revert
this Cl temporarily.

BUG=aomedia:612

Change-Id: I1dd8680dee17289801c4a209275f05a498355c8e

BUG=aomedia:614

Change-Id: I8aab46954af9d6c6d31aba0bd96d6eb9f181b84c

for chroma plane, when mapping from pixel location to the mi_row
and mi_col, need to consider sampling ration of the chroma plane.

Change-Id: I7a369fd6a5c6c4dc5495da64d83f90a532de7ad5

Extract the compution of the luma reconstructed average out of cfl_load
and into cfl_compute_average. The reconstructed luma average is stored
in the CFL_CONTEXT to avoid computing it for each transform block and
for each plane.

Results on subset1 (compared to 803bea26 with CfL)
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0474 | -0.1486 | -0.2931 |  -0.0358 | -0.0397 | -0.0127 |    -0.1162

Change-Id: I9e34af0fe5961ce8dbe70cb80aea2a16221d0d92

Account for the scaling factors in coefficient range of identity
matrix.

BUG=aomedia:612

Change-Id: If3e9669b72797862e6af65a943f2054ae34430ae

They do not handle border extension correctly (interpolation and
border extension do not commute unless you upsample into the
border), nor do they handle crop dimensions that are not a multiple
of 8 (the upsampled version is not sufficiently large), in addition
to using massive amounts of memory and being a criminal waste of
cache (1 byte used for every 8 bytes fetched).

This commit reimplements use_upsampled_references by computing the
subpixel samples on the fly. This implementation not only corrects
the border handling, but is also faster, while maintaining the
same quality.

HL AWCY results are basically noise:
    PSNR | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
  0.0188 |   0.0187 | 0.0045 |  0.0063 |     0.0228

Change-Id: I7527db9f83b87a7bb8b35342f7e6457cd0bef9cd

Change-Id: Ic328d112a4f950396d60113cf1b0f50e96fdfebf

BUG=aomedia:607

Change-Id: I5a5fb893f0237e7ca6e0d807e825f8d4e26949b2

The tool of ext-comp-refs adds the uni-directional compound reference
prediction. In details, 3 pairs of uni-direcitonal compound references
are added for the comp ref prediction:
(LAST_FRAME, LAST2_FRAME),
(LAST_FRAME, GOLDEN_FRAME), and
(BWDREF_FRAME, ALTREF_FRAME).

This new tool of ext-comp-refs will eventually overwrite
one-side-compound and have the two coding tools to merge to one.

It achieves -0.35 ~ -0.55% coding gains in BDRate, compared against
AV1 baseline with the default experiments on, but without
one-sided-compound. It achieves -0.2% ~ -0.3% coding gains when
one-sided-compound is on. It achieves larger gains on higher
resolution.

Change-Id: Icbdb16e97b96aaebaf2213f5f72d5331e2e358eb

Change-Id: Id9c025febf21aeb67cbc719f585661b715bdb9ce

Resolve enc/dec mismatch due to recent changes on low-bitdepth
flag.

BUG=aomedia:611

Change-Id: I833d30517edbab7bb19949cea8d1f7553c0babb5

Turning off the trellis optimization gives a performance
drop of 0.726% on the lowres set.

Change-Id: I4fdd1e20fb6f671162cd32b3abe699cd2aee1919

Reset xd->mi and x->mbmi_ext for the superblock after the first
scanning pass.

Change-Id: Iae9142ff2b1a2b576f54dc545b58fe37c97cecac

Although this does not fully convert var-tx to using
av1_block_dist(), it does make it use the same distortion functions
av1_block_dist() uses: pixel_sse() and sum_squares_visible().

Change-Id: I1173bc6941a3b895381b9fcb73b533b5afc31aab

Change-Id: I39c014ec58c08e29f60c8e4ea186fc57ac15c56b

When --enable-coefficient-range-checking isn't specificed, clamp the
coefficient at each stage.

This doesn't change the decoder behaviour for existing AV1 streams.
However, some AV1 bitstreams that would have been rejected by the
decoder as illegal (range check failure) are now legal bitstreams.

There is no impact on video quality.

BUG=aomedia:30

Change-Id: Ifa01186bae6bfe5d7712298e33d964c20f88435e

Small change to calculate the encode size for scale checking using the
av1_calculate_scaled_size function used elsewhere instead of calculating
it in place. Done for constistency's sake.

Change-Id: I72626b729477e28e868cf9028ea4537267a12413

Adds a separate scale numerator for resize and superres scaling on
keyframes. They will only use this factor in their respective FIXED
modes.

Change-Id: I4ef9a5760a5423ec632d644e6c7fec674bbb46f4

The code to pre-scale reference frames was hardcoded to only work
for 4:2:0. This makes it work for 4:2:2, 4:4:0, and 4:4:4, also.

It also eliminates the special case for a fourth plane, based on the
assert above that the total number of planes is no more than three.

Change-Id: I79870d2d11bfc3b6e2e73c48a9ba679bffab186f

-0.242% gain on cam_lowres

Change-Id: Ib9ba2f7dfc7d10b8066bd3f70eeafa7faac8a607

RESIZE_SCALE_DENOMINATOR and SUPERRES_SCALE_DENOMINATOR were two
constants with the same value that did essentially the same thing.

This patch merges the two into SCALE_DENOMINATOR for simplicity's sake.

Change-Id: I252a9b7f89f10d77bdb0c3cf2d67d31d337afa4b

Change-Id: I4092f9ca0f5497bffee31ec4a1e9804e90def42e

Change-Id: I2e783a16418708c6403de3c2e84450dbc83df3b7

Old inter_mode coding was obsoleted by REF_MV.

Change-Id: Ib812f626fe9f8e3342eee5d7b0214ed55701bec3

Adapt the intra_inter binary syntax element symbol-by-symbol
and remove updates from the compressed header.

Change-Id: I9abfd91d4521202f27854ce3e01b670ce15846e9

Perform symbol-by-symbol adaptation for the skip syntax
element and remove updates from the compressed header.

Change-Id: Ic42f60e19c56db52dd51b3784fd305c7e6b595c7

Simplify the number of different compile and code paths.

Change-Id: Id5b061571daeb070b91ec762fe7e07e8c114229e

Change-Id: I28e0d2c35c7b1eeb1d5f6eb5d4592ffa96032175

- User level encoder time reduction ~2.3% on i7-6700.

Change-Id: I04a5cf44c398b295977ff8c8958471a896bfb20d

in debug mode macro expension in assert cause compile error.

BUG=aomedia:605

Change-Id: Ie5c47a8496d043c0ee2e4d0b94cc2cf7ff168e6c

This tool was temporarly disabled because
it accidentaly triggered bug:

https://bugs.chromium.org/p/aomedia/issues/detail?id=575

This bug was fixed with commit:

6c20c78f

Change-Id: I33d8e0ce4f1c5dccef42588c62f4dc15828ce09b

Change-Id: I55919a31f24b206bfd7c06418277cab9b05855ee

- Added: CONFIG_COLORSPACE_HEADERS CONFIG_SPEED_REFS
         CONFIG_LGT CONFIG_SBL_SYMBOL
- Removed: CONFIG_RECT_INTRA_PRED
- Changed, 0 => 1: CONFIG_EXT_INTER CONFIG_INTERINTRA
                   CONFIG_WEDGE CONFIG_COMPOUND_SEGMENT
           1 => 0: CONFIG_ONE_SIDED_COMPOUND

BUG=aomedia:76

Change-Id: If9ebd068d0014386ec25d91226a577c591f5a774

with --disable-highbitdepth

Change-Id: Ib0dbb842d6634cb4a4d349b651275f230777cb8c

This was initialized from a const and never modified. But was still
passed around and stored in multiple structs.

Removed these 'rddiv' member variables and now RDOPT() and RDOPT_DBL()
always use the const RDDIV_BITS directly.

Change-Id: I1a8dfd2c8fa857d466ad1207b4f0dd6ec07eafb8

With C99 we can now declare iterators inside the 'for' statements,
allowing a better syntax for this macro.
This new syntax accepts #if/#endif inside the loop body,
and makes explicit, at loop body level, what the iterator name is.

Change-Id: Icbd363a34a9264ff566ee8057c08a705736b509f

Change-Id: I9158a54b80cf76346356e8dba90ee37f80808bf5

This patch will not cause any performance change regardless of whether
speed_refs is on or off.

This coding tool is targeted to speed up the encoder side reference
frame selection process. The essential idea is to have two scanning
passes for each superblock of size 64x64 and this CL lays out the
initial framework but no reference frame selection is done yet:

First scanning pass - To simplify the partition and the mode
candidates (e.g. considering nearestmv / nearmv / zeromv only) and
identify the best reference frame prediction candidates;

Second scanning pass - Use the best reference frame candidate(s)
obtained from the first pass to encode the current superblock.

Change-Id: I11266d468de3077271a5e866eebd341a8014d136

This moves up to the main the decision of which coding path to use,
aligning the decoder's logic on the encoder's logic.

Change-Id: I61c709ca1160aefb156d0be25cab8bb1c20ff92a

The 'intra_y_mode_bsize_mask' speed feature is never set or
checked, so can be deleted from the SPEED_FEATURES structure.

Change-Id: I3094ab7e8e87334e35a6646f6fbf0a8adaf78c00