GitLab

The new_tokenset experiment replaces the unconstrained tokenset with a
multisymbol alphabet in an inventive way.

Tested configurations:
new_tokenset + ec_adapt, new_tokenset, ec_multisymbol

Change-Id: I846ab2e51c2a1dc3f2f9904ed8c47a8e98f853c5

Change-Id: I1050b69045407381d4626b65a0bf6f35957a66f4

RD search and trellis encoding are still sub-optimal.

Change-Id: I233979909118241a0c78761c1d5c2cd6857915e0

BDRATE results:
lowres: -0.880% (up from -0.844%)

Change-Id: I017c0beddcc687148fed33c1e9963e05f1eaf6ea

Change-Id: I378b677cf579441ba0a9014a8a77a1cf3f8b5689

This will allow EOB_TOKEN to be merged with that value.

Change-Id: I82ba5e8d38e235d07894e43b5fec53968f84ab6c

Preparation for merging EOB_TOKEN. The block_zero value
corresponds to the first EOB_TOKEN: other EOB_TOKEN values will
be merged with non-zero values.

Change-Id: I94036783ee240fa916a79c544ecd716a9c24fa59

This commit renames deblocking_across_tiles to loopfilter_across_tiles, 
to get ready for dering and clpf integration.

Change-Id: Id25b051da9b1e5cb92f35a9619662597462d9537

This fixes the following mismatch bugs:
* At the bitstream level, the decoder would not read the delta_qindex
  information for supertx blocks, but the encoder always sent it,
  leading to the encoder and decoder becoming misaligned.
  The delta_qindex information is still required for supertx blocks,
  so change the decoder to read it.
* In addition, the quantizer was not properly adjusted for supertx
  blocks at the decoder. We copy the quantizer setup code from
  non-supertx blocks.

Since this does not change the encoder, it should not have any
quality impact.

Change-Id: I9a0f79c3aa66f2a5a353821e2a6f3b526636e7b4

Change-Id: Ibd4bbceca8218eb94ed0af3c980f8e829a1896de

Change-Id: I2a490e144099d7692296992528192c1f11d2c06f

Preparation for merging EOB into multi-symbol encoding.
The more_data flag for the first position is moved
out of the loop, and for remaining positions is
moved in with the previous coefficient. This way it
can always be associated with the previous non-zero
coefficient.

Change-Id: Idfb38058f4c415127b4d9a9beeb8ea2d3a2ec1a2

Zero, one, and two or more coded as one symbol (head).
Remaining tokens coded as a tail symbol.

The pareto CDF distribution is adjusted to cover tokens from
two onwards.

Change-Id: I98b33fab6b9f52690f6ad618ac55e725a97be056

- Added comments for some tables and #defines for clarity.
- Renamed some variables to ensure we use "color_index" instead of
"color" for palette color index related variables.

Change-Id: Ica95a26e0f171a41a3259c8e6b3b891b8cd10151

This reduces the complexity in a number of ways:
- We need just 3 neighbors instead of 4.
- Possible contexts reduce from 16 to 5.
- On hardware side, getting the contexts for a whole block will be more
parallelizable.

At the same time, compression performance improves very slightly:
- Screen-content set (videos) (Google): BDRate improved by 0.32
- screenshots set (images) (AWCY): PSNR improved by 0.62:
https://arewecompressedyet.com/?job=palette_withTR2%402017-01-27T21%3A30%3A28.890Z&job=palette_noTR2%402017-01-27T21%3A41%3A34.312Z

Change-Id: Ie84ca32f05d55ad481a51c2d3abc579468597189

Introduced in I745ca032f313c5041aacc98c03ae4bfc33d840de.
Stride should be plane_block_width and width should be cols,
 sanity check: cols <= plane_block_width.

Change-Id: Ic5128e94a909e498010c92fef2013da8df6d6d85

Fixes and turns on the test.

BUG=aomedia:312

Change-Id: I6c7d1970e743ec2b025a798070761d22624e796a

BUG=aomedia:314

Change-Id: I66af7f69ca0b97b9d840918a6b9ec34708a7f4e5

If part of a block falls outside right and/or bottom image boundary,
then only store tokens for the part of it within the boundary.

Also, consider only the part of the block within the boundary when
calculating the number of colors in the image, deciding the base
colors for palette, RD calculation etc.

The part of color map corresponding to pixels outside the image
boundary is padded with color indices copied from same row/column.
This behavior is similar to how pixels outside the boundary are padded.

For screen_content set, this is improves compression performance by
0.038 overall. One clip, in particular, has a significant gain of 0.8.

Change-Id: I745ca032f313c5041aacc98c03ae4bfc33d840de

Creates the PVQ_SKIP_TYPE enum to encapsulate the different types of
skipping that can be signaled by PVQ (i.e. skip: AC, DC or both).

There is no impact on the bitstream. However, the decoder will now emit
an internal error if the decoded skip flag is out of range. The
block_skip variable is also renamed to ac_dc_coded as it stores the same
information.

Change-Id: Ib2aadaf99dc1736ea392ae5ed8948c3cdc12da9b

Minor performance changes
0.03% better on lowres
0.01% better on midres

Change-Id: I7a7168f3a2a4d17a03353841a416eff6edf1e241

Now that https://aomedia-review.googlesource.com/#/c/6729/
has been merged, build_intra_predictors_for_interintra() is
now redundant, so replace it by a direct call to
av1_predict_intra_block() and remove the old function.

Reset rect_interintra back to 1.

To do this, we need to make the intra predictor take a
BLOCK_SIZE instead of a TX_SIZE. This is because we need to
be able to predict 32x64 and 64x32 blocks, but there is no
TX_32X64 or TX_64X32.

No effect on output or performance.

Change-Id: I8c185a211c97a85012cc54ec293c785a693608ed

Resolve the broken coding pipeline in ext-inter experiment when
cb4x4 mode is enabled. Turn off rectangular inter-intra mode.
This needs some more work to hook up. Given that it gives fairly
limited coding performance gains, disable it for the moment.

BUG=aomedia:309

Change-Id: I9b406df6183f75697bfd4eed5125a6e9436d84b0

Change-Id: Ieb2922c3df4ef4f8514b8a6df6f9a8fc45ef3cf4

This follows the naming for the other frame types, and allows libaom
to be compiled against other libraries that also #define NONE.

Change-Id: Ic2e2814587bbc5ea67385a9af775396d29b7dde0

This commit adds a new experiment, Daala's distortion function,
which is designed to better approximate perceptual distortion
in 8x8 pixel blocks.

This experiment is expected to work best with PVQ.

It measures the variance of overlapped 4x4 regions in the 8x8 area,
then uses these variances to scale the MSE of weighted frequency domain
distortion of 8x8 block.

Since AV1 calculates distortion in blocks as small as 4x4, it is not possible to
directly replace the existing distortion functions of AV1,
such as dist_block() and block_rd_txf().
Hence, there has been substantial changes in order to apply
Daala's 8x8 distortion function.
The daala distortion function is applied
after all 4x4 tx blocks in a 8x8 block are encoded (during RDO),
as in below two cases:
1) intra/inter sub8x8 predictions and
2) 4x4 transform with prediction size >= 8.

To enable this experiment, add '--enable-daala-dist' with configure.

TODO: Significant tuning of parameters is required since the function has
originally came from Daala thus most parameters would not work
correctly outside Daala.
The fact that chroma distortion is added to the distortion of AV1's RDO is
also critical since Daala's distortion function is applied to luma only
and chroma continues to use MSE.

Change-Id: If35fdd3aec7efe401f351ba1c99891ad57a3d957

This commit resolves an enc/dec mismatch issue when both filter-intra
and cb4x4 modes are enabled.

BUG=aomedia:253

Change-Id: I4026d93c00a819f2ce69aedba9d34a774319acbf

This commit enables the adaptive scan order system support
rectangular trnasform block sizes. It resolves the coding failure
when rect-tx or var-tx are enabled.

BUG=aomedia:143

Change-Id: Ic565284e811e3f7e0ebf2e08fb3748257ce8a049

This commit makes ext-tx and rect-tx experiments supported in the
cb4x4 mode. It resolves an enc/dec mismatch issue when all the
transform experiments are enabled.

The coding gains are
        ext-tx + rect-tx   cb4x4    vartx     total
lowres      4.0%           2.3%      0.5%     6.9%

The encoding speed is about the same when cb4x4 and vartx are
further enabled.

BUG=aomedia:139

Change-Id: I3fdabc6d5de23ceb78ac0751a9bf7332ebc0a3ac

Change-Id: I7bbd3c62341ede45628641766b8683b77f3a7efb

Change-Id: I522dfe77cbe0ea4833d11e25386586d7312c463f

Change-Id: Idd7926f0539a0bd039828e5882392fbfb024e531

Change-Id: I4b53dab674390496d8fe7299970c5fb327b5a7be

Change-Id: I61433d0c0bbab9b7cf74a405cbedd60965318888

Change-Id: Id01c785ad48134075c4f6643233413564f0b8fbc

Change-Id: I71c9bedfae2304c201fe6621a20c03f4e26a85cf

Change-Id: I3d64ec4bbc72143b30a094ece7a6c711d6b479cd

* Change Wiener filter storage to match the format expected
  by the convolve functions

Change-Id: I4d1fb08a13cfc31e69e12c1cb4b2e510c6d8ae30

This will support adapting in each tile.

(https://bugs.chromium.org/p/aomedia/issues/detail?id=71)

Change-Id: I3eced47715749a48f78c4ccf151c4d0b58f36c0d

Fix the bit-stream decoding failure introduced lately in cb4x4
and var-tx mode.

Change-Id: Id671b5ec98b32d65e4fb45812ee8d1b7037fd6ec