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Intrabc is counted as inter mode, but it doesn't support var-tx yet.
This patch skips tx partition info update for intrabc blocks. It
resolves a decoder crash issue.

Change-Id: I97e413e4a837ba6510e110347f5aa6e5fd14dcc5

BUG=aomedia:685

Change-Id: I592016faeb4645cf43c599e0e2e11127e2a17c4e

Change-Id: Ia84ea2f4e855671f5a29058cc7a6b5ba9e6bfef9

Encoder may do multiple rounds of transform RD search on the same
residue signals. Save the RD search results so that encoder can
fetch the results and terminate early if the residue signals have
been seen before.

The hash functions are ported from the hash_me experiment.

Test results show the encoder speed is increased by 10% on
average (ranging from 0 to 30%) with all default experiments on.

Change-Id: I47dd63549f67cb43d3d700f6a76ce0992b1ccd0d

Change-Id: I43e92e3f3799857e928543434d049b4155b64d7d

Change-Id: I0e9df3719e5f9a55e1386afe44851d1707e2e01b

Update cdf after each superblock being finalized, and re-compute
symbol costs. Affected symbols include prediction parameters and
tx type.
BDRate: -0.119% lowres, -0.092% midres

Change-Id: I724900ac04f725910ed7055a18c2f6a139469b52

BUG=aomedia:719

Change-Id: Id47c2c68cb61e142ce62fee5e97f7c474b3dc273

Change-Id: I3de1c933ee0fa90e9c0d52e6cbe4bc8bf5482a73

Change-Id: I7393596d98f11aa53ba4b9e329386b5168b3e086

Change-Id: I1cd1197b48a3315fe4f44578b80634be73de17a3

Change-Id: I2faf5d43db1e5726a08b24a19d8fb7ae1b86ad0a

Store the reference frame motion vectors in 8x8 block resolution.

Change-Id: I5afde20c40f09b44e943034232359bdaac4a2b64

Change-Id: Ie67266538db41c6aa7d79a5c270c26c021583c48

Lots of small bug fixes, mainly around the transform size coding:

* The loop filter was accidentally using the non-subsampled
  block size for the V plane, due to comparing a plane index
  (0, 1, or 2) against PLANE_TYPE_UV (== 1)

* We allowed an initial update of the transform partition probabilities
  even on frames where we know they will never be used
  (because tx_mode != TX_MODE_SELECT).
  Further, these probabilities would not be reverted at the end
  of the frame, leading to the probability delta persisting across frames.

  Change this to behave more like the non-var-tx transform size coding,
  where probability deltas are only coded for frames with
  tx_mode == TX_MODE_SELECT, and the deltas only apply for one frame.

* Fix decoder for the case where the video as a whole isn't lossless,
  and we have tx_mode == TX_MODE_SELECT, but the current segment
  *is* lossless.
  Note that the encoder already does the right thing in this case.

* Don't allow the transform splitting to recurse "below" 4x4.
  This is really just a refactor, but means we can increase the
  maximum depth when subdividing rectangular transforms if we
  want to, whereas the previous code would have needed special cases
  for 4x8 and 8x4 transforms.

* Finally, when we hit the maximum splitting depth, don't update
  the counts as if we had coded a 'no split' symbol.

Change-Id: Iaebdacc9de81d2e93d3c49241e719bbc02e32682

Change-Id: Idbde50deab816b669ca362e3e739c76a7f434f2c

When Chroma from Luma is combined with chroma_sub8x8, the prediction
used for sub8x8 blocks originates from multiple luma blocks. Extra
asserts are added to validate that the prediction buffer contains all
the required information.

Change-Id: I305c46ce9b8292697e1d5b181d123461026da11c

Remove the token prob tables and counters.

Change-Id: Ic63d52d80bb922fc10b586c27a20f2378618168c

Enable the use of motion field estimation in the dynamic motion
vector referencing system. With default experiments on, it improves
the compression performance:

lowres 1.2%
midres 1.5%

Change-Id: Ifc5b15a7239b5c3212ea50f326ab99d372034658

Add frame index to the deocded frames. Store such information to
the reference frame buffer pool. This design allows each frame
to know its index in natural order, as well as its reference
frames positions.

Change-Id: I5bb36928dc5750a4fdcc582dca0d244d6482f400

These are not currently being used for anything so there is
no impact on performance.

Change-Id: Ida4e0afcc10bee665f8daa379314cd18b3a4ea28

Since 3ab24050, contents in #if #else branch are identical.

Change-Id: I763ea765f5b2a69625894a5c611db2c1987e4ccb

Patch 5c06a646 pulled the "if (!cm->loopfilter_across_tiles_enabled)"
check out of av1_setup_across_tile_boundary_info, intending for the
condition to be checked in the caller instead. The check was added
to the decoder but not to the encoder, leading to encode/decode
mismatches when the flag was set.

Fix this by correctly applying the change to the encoder as well.

BUG=aomedia:715

Change-Id: I61182bd717e2cb84228091fb439270dce153705e

Change-Id: Ib82c670e33ca2bf8535621a3dcc5e46f27f5e96d

Reduce the encoder memory footprint in lv-map by ~800X.

BUG=aomedia:713

Change-Id: I7aad604cf3186a0d3c6d5b6d1aa9489ac7c36093

With recent changes, it is now possible to store the storage
flag inside the CFL_CTX. This simplifies the implementation
and will allow reuse in the decoder.

This change does not alter the bitstream.

Change-Id: Ibb8aebdd3d06f8765d40248ece8a038892e87032

Reworked how the storage flag is set to avoid duplication on the encoder
side. Reconstructed Luma pixels are stored in encode_superblock in the
loop that calls av1_encode_intra_block_plane and in the extra call to
txfm_rd_in_plane after the luma RDO, but prior to the chroma RDO.

This change does not alter the bitsteam.

Change-Id: Ifd8441363ea0733fea3d06129a025940abb2abc9

This reverts commit b855b8e8.

Reason for revert:
breaks the rate assumptions in:
AV1/DatarateTestLarge.BasicRateTargetingVBR
AV1/DatarateTestLarge.ChangingDropFrameThresh/2

Change-Id: I92c4709b6c1bd98a78fe5aa6f0167a534fed5997

When updating default_partition_cdf, this sums the probabilities that
were divided evenly across the pairs PARTITION_HORZ_A/PARTITION_HORZ_B
and PARTITION_VERT_A/PARTITION_VERT_B. Those summed probabilities now
get distributed evenly across the triples you get by adding
PARTITION_HORZ_4 and PARTITION_VERT_4, respectively.

Rather than implement 2X8/8X2 blocks for now, ss_size_lookup returns
4X8/8X4 block sizes to use as chroma transform sizes for 4X16/16X4
blocks.

The changes in setup_pred_plane and set_skip_context are because this
is presumably the first time we've had to deal with 16x4 or 4x16
blocks. Since BLOCK_16X4 is not less than BLOCK_8X8, the existing
logic didn't work (and the "shuffle back one" logic should probably be
done for small widths and heights separately).

Change-Id: If28d8954da42d6c726f2bcce2cb5242154b0870c

Update cdf after each superblock being finalized, and re-compute
symbol costs. Affected symbols include prediction parameters,
tx type, and new motion vector.
BDRate: -0.121% lowres, -0.089% midres

Change-Id: I005ef382762d6e3423f933cca0a0b7b40288e8bf

This will allow the mrc-tx experiment to pass in its own color map
and set of probabilities to the tokenize and bit packing functions.
The corresponding change on the decoder side will come in a followup
shortly.

No change in performance.

Change-Id: I1872b7f1b1cf5b102e6289388ce1ae449e67cb4d

This reverts commit 38cdce8e.

Reason for revert: <INSERT REASONING HERE>

It is reported that this introduced a segment fault, revert now to investigate. 

Change-Id: I229dcdc09462ae4eb9cf2a3da4ce59aa9eafe65e

Make the lv-map rate-distortion optimization account for the
per symbol cdf update. This improves the level map coding
performance by 0.4%.

Change-Id: I1cbecafbad4e6642abc3782c9741636d92d87eb7

Allow per symbol cdf probability model update in the lv-map
encoding process.

Change-Id: Id0c4a659c04ffa981d8f04537eda2f1304d1682a

BUG=aomedia:685

Change-Id: I0698b281fbaff2e77a50f5dc9a10d752de6c6f79

Use --tune=[cdef-dist|daala-dist] to enable them.

Also, this commit set the use_activity_masking of PVQ as 0 by deafult,
which means that PVQ assumes daala-dist is not used by default.

Since we're currently not signaling which metric the encoder did use
in the bitstream, the compile flag AV1_PVQ_ENABLE_ACTIVITY_MASKING will tell PVQ
whether daala-dist is used or not.

This commit is the last part of prep-work to remove DIST_8X8, CDEF_DIST,
and DAALA_DIST experimental flags.

Change-Id: Ia465b4d6fe64aac7f04852c8f9f4bac3409d2435

Currently the rate is never computed for the palette color indices.
The code to compute the rate is inside av1_tokenize_palette_sb
when dry_run == DRY_RUN_COSTCOEFFS, but av1_tokenize_palette_sb is
only called when !dry_run.

Change-Id: Ie33eae9e4bcf1997a22dc939f31001334cb2c399

Even if 'dist-8x8' is enabled with configure,
the dist-8x8 is not acutally enabled (so, no change in encoding behaviour)
until the command line option, '--enable-dist-8x8=1" is used.

The cdef-dist and daala-dist can not be enabled by a command line option yet.

This commit is a part of prep-work to remove DIST_8X8, CDEF_DIST,
and DAALA_DIST experimental flags.

Change-Id: I5c2df90f837b32f44e756572a19272dfb4c3dff4

When ext-comp-refs is enabled, one-sided-compound is enabled by default,
which ensures the use of ext-comp-refs is an extension of
one-sided-compound. Both coding tools allow the use of same-sided
reference frame pairs for compound prediction.

Also, remove the dependency of ext-comp-refs on var-refs, i.e. these two
coding tools can be independently enabled. They can still work together
if both are enabled simultaneously.

Change-Id: I3134e7e2956dc35d557fe814f5d801d473683650

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

Change-Id: I0682face60f62dd43091efa0a92d09d846396850