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This ensures TGs can be decoded even if the whole
frame has not been received and the frame length
is not known.

Change-Id: If24837fcc3b5c46554751be792e91100de73e8d6

This is a manual adaptation of the following commit from aom/master:
ce12003d

The original commit message:

A tile group is a set of tiles in scan order.

Each tile group has a version of uncompressed and compressed headers,
identical apart from tile group parameters.
Encoding probability updates takes account of the number of
headers to control overheads.

The decoder supports arbitrary numbers of tile groups with
arbitrary number of tiles. The number of tiles in a TG is
signalled in the uncompressed header for that TG.

The encoder currently only supports a fixed number
of TGs (3, when error resilient mode is on) of equal size
(except possibly for the last one).

The average BDR performnce with 3 tile groups versus
anchor with error resilient mode and up to 16 tiles is:

NR YCbCr:      3.02%      3.04%      3.05%
PSNRHVS:      3.09%
SSIM:      3.06%
MSSSIM:      3.05%
CIEDE2000:      3.04%

Change-Id: I9b97c5ed733103b9160a3a5d4370de5322c00c0b

Unify the transform block and coding block mapping.

Change-Id: Ifb394809a4aafee6adf2b49a2607036cf13c878e

Change-Id: If497b53c3b36e32fb98c99dba2d4a490e226572a

Previously, when ext-partition-types and either clpf or dering were
enabled, the signalling for clpf/dering would not be encoded or decoded,
as the code to do so was inside a #if !CONFIG_EXT_PARTITION_TYPES block.
This caused many tests (eg, AV1/EndToEndTestLarge.EndToEndPSNRTest/0)
to fail with encode/decode mismatches.

Change-Id: If1742deb1812877813b2c3e93a048430f9a504ba

Make the codec support 2x2 tranform block unit for chroma components.

Change-Id: Ic454535bd5620abe88a2e99789160cc4664ee518

This commit fixes two major bugs in parallel deblocking experiment, the
first one is missing initialization of lfm->lfl_uv array for horizontal
filtering. The second one is inconsistent order of vertical/horizontal
filtering of superblocks within a frame between encoder and decoder.

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=45#c2
BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=53#c1

Change-Id: I2df7eb313d49203fb70efe2bdf957b9d7e0bf678

Introduce the transform block partition depth macro definition.

Change-Id: I218dc77a77c8e967da4d270d4ec0d7691b712a5f

Change-Id: Ia09edf92bf9f7ecacc65c232ac6e656cde236634

Change-Id: I7593ff2f8949d8bc26ca1c8577faaefb09640b59

Change-Id: I4b18dbfb013c9805cb23083a68560ab212a0867a

Performance improvement
        BDRate
lowres  0.921%
midres  0.730%
hdres   1.019%

Change-Id: I26208d6c0531937bff44de505b4ea355c7852802

Covering commits 1c263e03 and 79d8a07d from AOM codebase

Change-Id: I6400e5f99bbb2ef6584ef232d465e520230c06e0

Simplify the input arguments. Make direct use of the block size
in the unit of pixels.

Change-Id: Ifec9d90b4b4fa9605f93b4f93b8242f76f898b5f

It seems that when bit accounting was introduced in
https://chromium-review.googlesource.com/#/c/400658/
there was one place which was accidentally skipped, leading to build failures
with --enable-dering. This patch adds the missing information.

Change-Id: I59e1bd6f7e1d4fa58506ee7af307b845c78a7cbe

By default, when building with --enable-accounting the bit accounting
 code will collect statistics for every frame while decoding.
Collecting statistics can slow down decode time and we would eventually
 like to enable the CONFIG_ACCOUNTING flag by default.
This patch adds a runtime flag so that bit accounting statistics are
 only collected when actually needed.

Change-Id: I25d9eaf26ea132d61ace95b952872158c9ac29e7

ISO C90 forbids mixed declarations and code and the function
 aom_accounting_set_context() was being called before the MB_MODE_INFO
 declaration.

Change-Id: I8619525b1b2fd37753891bd310d9d59c881b8807

Move computing the class0_fp_cdf and fp_cdf tables per coded mv
 symbol to computing it only when the probabilities are updated.

Change-Id: Ib4957c8ab21e6189bcc3817a07b7681dfb343223

Move computing the class_cdf table per coded mv class symbol to
 computing it only when the probabilities are updated.

Change-Id: I6c4a9075817e8ba2e251f0e82436995f08f2ec5c

Move computing the joint_cdf table per coded mv joint symbol to
 computing it only when the probabilities are updated.

Change-Id: If5d195f70e6fad7b60f69606c8386ad5e69657d2

Move computing the inter_mode_cdf tables per coded inter mode symbol to
 computing them only when the probabilities are updated.

Change-Id: I7a7b059ee75723cb6f278ed82a20cf34c27915d8

Remove unneeded block index.

Change-Id: Ifceab4985d3ccd65d4c0a110de83a0b457ce5868

Use lookup table to replace the arithmetic computation for transform
block step.

Change-Id: I1318d81bda9d7ffaf9d550acd19354b0615ede36

Allow the decoder to memset partial dequantized coefficient line
to zero.

Change-Id: I1f07dc7bf802958754502c1b5c819cc81e7a08cb

Move computing the uv_mode_cdf tables per coded intra mode symbol to
 computing them only when the probabilities are updated.

Change-Id: I627b59d30726c913f5d7ba7753cb0446a12655bb

Move computing the y_mode_cdf tables per coded intra mode symbol to
 computing them only when the probabilities are updated.

Change-Id: I8c43d09b8ef5febe2a3ec64bd51d28bd78ea73ed

Move computing the kf_y_mode_cdf tables per coded intra mode symbol to
 computing them only when the probabilities are updated.

Change-Id: I5999447050c2f7d5dbccde80bee05ecd1c5440ab

This CL will facilitate adapt_scan experiment.
In adapt_scan experiment, dynamic scan order will be stored in
AV1_COMMON

Change-Id: I4763ea931b5e1af54d4f173971befeb01a4db335

Use the table access to retrieve pixel numbers from tx_size.

Change-Id: I9459f2c3292c2f9ddf963f16b79e142de7432031

Remove the separate implementations of set_contexts() in encoder
and decoder.

Change-Id: I9f6e9b075532faae0f74f885d9443589254258a7

Change-Id: I90ef3b49b499c2ac9c24797467cb4eb194fdf23b

This was a missed replacement from cherry-pick of:
9ac7a9dc

Change-Id: I9e01d9d7a39bed397500a293bf68dca2746aa917

BUG=webm:1277

Change-Id: I052239e8a6c468da8704bdbbb663b59533c01be2

Plus a small code clean up. The experiment of EXT_REFS, compared against
the baseline, using Overall PSNR, now obtains a gain on lowres as:
Avg: -5.818; BDRate: -5.653

Compared against the previous EXT_REFS results on lowres, a tiny gain is
obtained as:
Avg: -0.047, BDRate: -0.063

(1) 780952 Add encoder first pass support to bi-prediction in EXT_REFS
(2) f91498 Add pred prob handling for new references in EXT_REFS
(3) e91472 Add decoder support for bi-direct prediction in EXT_REFS
(4) 0dbac9 Add encoder support to new references in EXT_REFS
(5) ad70cc Remove hard-coded number for EXT_REFS
(6) 9c1e2f Add the use of new reference frames at encoder in EXT_REFS
(7) 6d4fde Add the experiment flag of EXT_REFS

Change-Id: I26f7ca45b9ede7579fdb9d0d6a1a91f4334599bd

Change-Id: Iccb75d5204f0f52f2c7d6e18d1f8223ce10f68ba

Example performance: 1.8% bit rate savings using
the AQ test mode aq-mode=4 :
./aomenc --codec=av1 --ivf --tile-columns=1 --tile-rows=1 \
                 --kf-max-dist=1000 --kf-min-dist=1000 --cpu-used=0 \
                 --passes=1 --threads=1 --lag-in-frames=0 \
                 --end-usage=q --limit=600 --cq-level=42 \
                 --aq-mode=4 --error-resilient=1 out.bits FourPeople_1280x720_60.y4m

Change-Id: Iba01cf2732a57f3c27481ac2a3c8fc37bb9e5533

Change-Id: I4128af44776d1f361bddc1fdffb75ed2224dbfa5

Change-Id: I2228a3d1778917ac760582fbec3c868be5d9ba1c

This commit changes to send frame size explicitly when
error_resilient_mode=1. Purpose is to allow parsing of bitstream
after a packet loss.

Change-Id: I7d1c010a465aa18914762cc1a3e61db377304c08

Change-Id: I1a462675c06c4b2a5f8b4b347f23fec67feccdd0