Change-Id: I03adc36f5e5f839d23c4f50a864d317d008e30a6

Observe 0.1% gain on lowres wo optimize_b before rebase

Change-Id: I0cb5b5e4be2563093efb2f6dfbefdce9b554e910

Change-Id: I3209d0074bf3ed1fda260dc2f5cacbfa616ad6ae

Change-Id: Ie52d52bc25e3fdfdea877349215431d8edc064a3

Fix the index order of br_idx.

Change-Id: I55acda816d1ec33c25ca4c31b09976f5e6f9c562

Replace the truncated geometric distribution model with the grouped
leaves structure for more efficient probability modeling.
Each group has its own Geometric distribution

This give us 0.2% gain on lowres

Change-Id: If5c73dd429bd5183a8aa81042f8f56937b1d8a6a

BUG=aomedia:719

Change-Id: Id47c2c68cb61e142ce62fee5e97f7c474b3dc273

This will let coding performance drop slightly
lowres 0.093%

Increase encoder speed by 24%

Reduce nz_map's context size by 20%

Change-Id: I871c18a7e0341e066afc334556b9998194b3f8c9

Change-Id: I7b0e998182b522274768e4b587080d8e88f3a223

Support the per symbol cdf update at the level map syntax element
decoding process.

Change-Id: Id58bf86fb1c7c72dd14ddaa3781caaa27f446ef7

Change-Id: Ibd0bda593717aab2894c36dd59925a0bcf654113

Use the row and column indexes to fetch txk_type, which allows the
chroma components to derive the tx type from the corresponding luma
components. It improves the coding performance of txk-sel by 0.18%.

Change-Id: I3f4bca5839e13ae95e51053e76cd86fe58202ac9

Change-Id: Ied1a493723cac2ec4674bac642525a937826733f

Change-Id: I2888bd8905253e02e3ac74597275cf56e5142d29

Use row and column indexes to fetch the txk_type value.

Change-Id: I881d500c030e322d8aca9dccb6ff2870c9e1e392

Support the transform block kernel coding for rectangular
transform block size in var-tx. This integrates txk-sel with
var-tx.

Change-Id: I9a8edd84812168f56c79b78cc9af34f6304b1d54

Change-Id: I2e5191d0274776521ec7e3a2f79468dc86adb9e0

This is to facilitate future experiment related to adapt_scan

Change-Id: I51628f3df81bd82db7f8f553d13da0ee5792d7d9

cb4x4 itself should not require these sizes.

This simplifies compatibility with other experiments, since we can
first make them work with cb4x4 (which is now on by default), and
then worry about chroma_sub8x8 and chroma_2x2 (which is not) in
separate steps.

Encoder and decoder output should remain unchanged.

Change-Id: Iff2a5494cab3b7d96f881e8bd9cd4bf18c817cfa

Make the level-map and var-tx work together.

Change-Id: I5ff80a3cbc43af64b504934209720f387b89dbd8

This commit makes the level map coding system support the transform
coefficients from rectangular transform block sizes.

Change-Id: I5cd6c71d12e41938f942adc98cc1e1f286336f12

Explicilty use the transform block size to determine the coeff
band array. Remove the assumption on square transform block size.

Change-Id: I18e285130465a5eced49304a27a6cb617e297760

Map the rectangular transform block size into the bigger square
transform block size as the context for level map probability
model.

Change-Id: I20cf2b16daec16172855a78a201b670ff0547bf5

This function pre-generate counts/magnitudes of each level map
such that we don't have to re-calculate the counts/magnitudes
while doing the optimization.

Change-Id: Ifdfc89522cf2f2b9f3734d451324081f42b47cb0

BUG=aomedia:443

Change-Id: Iebdb609564c2c3040f3902052afeeec7ae83412d

This will separate the transform kernel selection from lv_map
experiment such that we can evaluate each feature's performance
separately

Note that txk_sel is build on top of lv_map

Change-Id: I5bd1ea99be30000efcdc2bcd42de002b78b1c3c8

This is for lv_map experiment

Change-Id: Ie000f7850efac32ffb46b9a4679cff2814c6246a

Change-Id: I3e9d9b3b59ee179b0fd24da2f0366ec841d2cfcf

The while loop may become infinite loop due to bitstream error.
Therefore, we add a breaking rule to avoid that.

Change-Id: I5bcda7dea846e280b59abc97c42baf334bca2603

Change-Id: I215c4bed9ba5c7f4fc93533249610217de14ce54

The feature is implemented in the following two functions.
av1_write_txb_probs
av1_read_txb_probs

Change-Id: I0b646e17ec54d7a10a77a6853439217091455af1

Change-Id: Id70fbfbca6c53a0aa15ff5606bb972e7412b3ed0

Change-Id: I45c8e26214cedb822ee5c38556ad03e3f2ad66a5

Change-Id: I3f059dc16124bbce2210296de5b884b5906ec182

Change-Id: Ifcdd3ce2953c1ecb1d0962da412a4b5ba2cda912

Change-Id: I222b5ce9ee1a1c1aac5620b94835967dd9a014c1