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Change-Id: I0c58fb5ee2a77ae15f6243b1c645dbe601171e67

Change-Id: I246da885154303d139f5d97c53ebfc55d6dc82ca

In preparation for enabling backward updates of contexts for PVQ.
1. Default prob setting for PVQ,
which is based on flat probabilities at the moment.
2. At the end of encoding a frame, average probablities and expected values
of PVQ are copied to the frame context.

Change-Id: I1d087b98e6b0d55ebf8aef696dd986f88197cedf

Do multisymbol coding for transform type.
Load default cdf probabilities directly.
Use CDF frame update mechanism when EC_ADAPT is
enabled.

Change-Id: Id23c927e81587b560e9df8b9bc56c0e2e3bb6f03

Use cdf to signal intra filter type.
Skip forward update when ec-adapt is on.

Change-Id: Idd446e081b8e9ea33356e60423b372bfd85a80db

ec_multisymbol+ext_partition_types:
base_ext_types@2017-03-15T18:24:38.012Z -> 8565_3_ext_types@2017-03-17T18:29:48.794Z

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0346 | -0.0343 | -0.0341 |  -0.0345 | -0.0345 | -0.0344 |    -0.0345

ec_multisymbol+ec_adapt+ext_partition_types:
base_adapt_ext_types@2017-03-15T18:27:31.704Z -> 8565_3_adapt_ext_types@2017-03-17T18:30:01.108Z

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0422 | -0.0420 |     N/A |  -0.0425 | -0.0423 | -0.0423 |    -0.0420

Change-Id: Ia40f118f0faf546be13e02ec9ed584dd38529a59

Also remove forward updates for delta_q when EC_ADAPT
is enabled.

Change-Id: Idf71b57bfe7763bc60595bc45768e624dd7b67bd

Delta Q is coded with a single tree context.

Change-Id: Ie1e56c70285e948232049bfb4a51ad0e9ee25f75

Change-Id: Ie73bb51d4a24c2ff719758c38e303db92e6f4500

No change in BDR.

Change-Id: I77551120a2e94dcbf818b039154495f0f9b21755

This will make it easier to add native CDFs for all the
dependent experiments without excessive macros.

Change-Id: Iee4710f0fe1c1b4300f686cdf2c5b879a36de987

Change-Id: If5d4f6d261276d9cfdd59fd7779467d92f56c395

This commit produces a bit-exact bitstream because prior calls to code
 the tx_size using aom_write_tree() would automatically convert the
 aom_tree_index on the fly to a CDF.
The tx_size_cdf[]'s are now computed once per frame.
Based on recent tests, this patch reduces decode time by 4%.

Change-Id: I920dbf036b8a9574ea6e65ae5f9c43eef1c3f864

Symbol count is maintained in the position after the
last CDF value.

Change-Id: I1882e48bfb1404ea7b83ef410298484939601796

Change-Id: Ib1b5dde5d4c6479c968cd7d7a4a1d01abae1fcf6

Change-Id: I070ee1acde80c99576d30f2611b6c653834b3e9b

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

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

These are optimized for EOB_TOKEN being associated
with the current position, not the previous.

CBP tables cover EOB_TOKEN for the the whole block.

This change causes a performance regression until
EOB_TOKEN is merged into the coding scheme.

Change-Id: Ica3a12ed97285cbae204ce3cc1a7e658ebcacc9f

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

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

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

Change-Id: Id01c785ad48134075c4f6643233413564f0b8fbc

This commit adds 2x2 transform block scan order to make the
adaptive scan order support cb4x4 mode.

BUG=aomedia:135

Change-Id: Ic8c3ae9ed65d577df629524b617b386b5e799d4c

Change-Id: I0cacd4e8cdd07458b36bbdd56e4f005327854b34

Change-Id: Ic0eba16329d7b63dd7d18e9cd28b89be4b5f2710

Change-Id: Ia5046d9158d5421a7f6e0397f4fa1e1925ae2ccb

Change-Id: I1cf27d2f029c1e985cafb468f60e7117d92593f5

Change-Id: I3f7eeff102fc30e2cef59c2c07df94826587d100

Change-Id: I21785bec0563299b4b0c1d17aaaa788e4e8df4d7

Change-Id: I76259d6ec925a0c7024e7c70a517debe2d3bf1ab

Change-Id: I62b662052a4b9b1de07575824410aa9b2ce2c924

Change-Id: I0005c896a243275c052a0163a5da0f9230071743

intra-interp experiment allows intra prediction to use different
interpolation filters. It was part of the ext-intra in the nextgenv2
branch.

Change-Id: I27ab692494dc79bb92e457dbf9a72988577f1c6d

This filter is meant to replace the bilateral filter,
but is currently added in addition to the bilateral filter
for testing.

Change-Id: Ia529701e69833d47c11b3367d5bf804eb8498079

Performance gain (REF_MV on by default)
WARPED_MOTION: 1.061%
WARPED_MOTION+MOTION_VAR: 2.917%
MOTION_VAR: 2.337%

Change-Id: I43f742a02cdd43d13ef333a0a15087062ad020ab

The recursive transform block partitioning system naturally supports
the use of rectangular transform block size. Hence there is no need
to make a separate coding route for the rectangular transform block
size support there.

Change-Id: I709b61f94cd4a6ea3f33c05abe319488c7d24f5a

This is currently just a refactor and creates no change in performance.
It allows new compound types to be added easily in the future to
facilitate experiments with segmentation masks.

Change-Id: If48fed216d482454fabb45a304b4220ada0dbdee