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This name better reflects the functionality of the mode.

Change-Id: Idc2372e7c7b226f70f63fa4f272a88cb4d857089

With --enable-ext-partition, it is possible to have superblock size at
both 64x64 and 128x128. But MAX_SB_SIZE_LOG2 is defined to be 7, i.e.
128x128 size. In get_token_alloc(), the token count for a tile or a
frame is always computed based on "tokens/superblock * number of
superblocks", so it should use the actual superblock size, instead of
128x128.

The segfault in #988 is a result when every tile is defined at one
single superblock of 64x64, the token size computation for each tile
was assuming it is 128x128, resulting 4x overestimate of the token
count for every tile. This caused the pointer for many tiles to go
beyond the allocated token arrary, which is correctly allocated at
frame level.

BUG=aomedia:988

Change-Id: I2da21f181446ad7117ce3269f01a43950c379028

The speed feature simply restricts the number of depths
searched. Currently it is turned on by default for speeds>=1.
The coding efficiency impact (tested on lowres 30 frames) seems
to be ~0.15% and the speedup is in the order of 15%.

Change-Id: I514832bd7df937292875f73d9c9026e49ac576f2

Change-Id: I12471d18544a9634c28ed139b7211c9af0762927

USE_UNI_COMP_REFS is always true when ext-comp-refs is enabled and is
always false otherwise.

Change-Id: Ic6061a4ab88a2ebfeb11f178872ab13909060c0b

* add build-time option to add/read 4-byte size of every OBU
* update to R19 by adding forbidden bit to obu header
* add metadata OBU decoding

Change-Id: I525264f53a8666b7bc29493fb29ae661841eba50

This makes the ext-intra angles symmetric around 135.

Change-Id: I81d4134a69e2de3e740299d66dbb9c28c59b73a5
Previous: 45, 67, 90, 111, 135, 157, 180, 203
New:      45, 67, 90, 113, 135, 157, 180, 203

The experiment of mfmv has already extensively leveraged the use of
the motion vectors from the reference frames, hence there is no need
to further add the motion vectors from the previous frame to serve
as the motion vector reference candidates, let alone such motion
vectors have not taken into account of the use of frame offsets.

Experimental results collected so far have shown this patch has zero
coding performance impact.

Change-Id: I57a2f8b60797bd5e8f0a95206689b6e443b28ed1

BUG=aomedia:992

Change-Id: Ibac542608d9abd669d0e8cf871960b2cf0a6da6a

This is the first step towards moving the upscale convolve function
to convolve.c

Change-Id: I916a974a881d104b0b3cde861fa8bb898883af01

BUG=aomedia:938

Change-Id: Ic730ac1136e915d193f3b48f7788baa093e7ff0f

This addresses an inconsistency between the set used
to decode the tx_type in the bitstream and the set used
for the tx_type search. Previously, the set used to
read/write the tx_type was based on the smallest tx_size
in the vartx partitioning, but the search uses a set
based on the largest possible tx_size. This patch
changes the tx_type search to use the transform type
set associated with the tx_size 1 recursive level down from
the max square tx_size to make the search more consistent
with the bitstream syntax. If a tx_size is selected for an
invalid tx_type, DCT_DCT is used for that partition instead.

This patch also adds assertions to all exposed transform
functions to ensure that no illegal transform type/size
combinations occur.

This currently gets a 0.1% drop in performance on lowres.
The drop is due to the reduction of the tx_types available
for 32x16 and 16x32 transform sizes. Before this patch,
32x16 and 16x32 transforms were getting assigned a
set of 12 tx_types, some of which we did not intend to
support for these sizes.

Change-Id: I44aca4876b261c345623cd04ad6235bca4532701

Change-Id: Icbedc16b01adf9b48f0f357ec89143462865d54e

Always at least set the first row and the first col, otherwise will
have unattended entries if we enable 4x16 or 16x4 txs.

Change-Id: I403ea3694ccf8c7ee1584f55bbc3e9b8355d9272

Change-Id: Ie9152c5a631cd53ac69cc09469682505a88b045d

At the frame header level, add the checking on whether an inter-coded
frame allows the use of 'skip_mode'. At the block level, add the
decoding of 'skip_mode' for all the blocks if 'skip_mode' is allowed
for the current frame. If 'skip_mode' is set, no further bit needs to
read out, and the block is set as:
- Inter-coded in compound mode;
- With the nearest forward and backward reference frames;
- In NEAREST_NEARESTMV mode;
- In SIMPLE_TRANSLATION motion mode;
- In COMPOUND_AVERAGE compound type; and
- Skip set for residual.

Change-Id: I50297f63a81135109332c4a51b516bffd7726777

Change-Id: I5b7bb9983e1c613321704a579d459925bd6b9b2b

This would result in certain motion vectors getting
lower weights than they deserve, so putting them in
the wrong position in the stack.

BUG=aomedia:981

Change-Id: I8bd106e97f494f5d3debaf967efcabcd39846726

Change-Id: Ie1751b111ce8b21424e5e7b8c7407163d4c81b99

BUG=aomedia:926

Change-Id: I3ec5ff501e2a6791ed13dcb0a7f4755b86e3910b

This reverts commit 1542157b.

The associated bug (#881) was fixed a couple of weeks ago.

Change-Id: If05627fd32ff9be1c4f425159798cfe46b6b2908

Further reduce the context model size needed for base levels down
to 25 per transform size.

Change-Id: I9df4870d2b027cdb1356de0fc4d5bcc22155319e

Reduce the context model size required to code the base level
syntax values from 42 to 32 per transform size.

Change-Id: I08485fdb563bc5c3323b0e147d69b47c286b9bb5

This loop is wrongly vectorized by the MSVC2017 compiler, this change
is a work-around for the compiler bug.

Change-Id: Ie4c8403965c3e4cd6d70eb3dbc92148f5272f0ab
(cherry picked from commit 5b33d7184bf319d9c10e34ef0fdcdd244d2fdb56)

Int was used but should have been int16_t. This does not alter the
encoder/decoder behavior

Change-Id: I6bfd8a3942e9f9b86cccf10c144fec147e996944

This changes serves to illustrate that DC_PRED does not
need 32 bits. It only needs the specified pixel bit depth.
Which fits inside a signed 16 bit integer.

Change-Id: Ice062c8c4a794cb4f32a3963278f4a99ef326dda

With the previous addition of cfl_build_prediction_lbd and
cfl_build_prediction_hbd there's no need for cfl_build_prediction.

Change-Id: I4246a53378f1e85be40c14433a3084d7120ad060

Change-Id: I97f7d390e580b6e1b2b471a6f1a95082323d39aa

This experiment has been abandonned.

Change-Id: Ifde0a76266af9f8c202c01805410b72d64594b0b

This experiment has been adopted, we can simplify the code
by dropping the associated preprocessor conditionals.

Change-Id: I54fee8a18afaec5333ae852eb6bd9ac0e2550db1

Avoid switch warning regarding fallthrough, add consts.

Change-Id: Ie3a03e60420d962941abc4e144648f29401916b9

When the frame header requires to cut off the motion vector
referencing from prior frames, shut off the use of motion field.

BUG=aomedia:984

Change-Id: Ib47129ea538248f4e67d115be2da3b5dd861693e

Disabling such cases will reduce search time without hurting
coding performance (-0.001%).

Change-Id: Iaa4385053fcf5bd59fb1f94d5583eb19cf792242

This experiment has been adopted, we can simplify the code
by dropping the associated preprocessor conditionals.

Change-Id: I2dce80e1e1b2116708b6ba9feeacaacc12af8fc4

Adopted by AOM WG on 08/17.

Change-Id: I3e5b369e9d8220c7b3f9e6f9d300eb640e2bf3a8

Adopted 08/24.

Change-Id: Ic6ccc766c821f7bba2779c069f00ccc131ff9c10

This patch factors out a function that computes the rd cost for
a given transform type given the transform partition already
computed. This is then used to develop a speed feature where the
transform size search disables trellis optimization but once the
transform sizes are decided, a final search is conducted with
optimization turned back on.
This patch does not change anything in speed 0 yet.

Change-Id: I30acfc5e2dd353d711e5f4260d5b344847b03ade

This experiment was provisionally adopted at the F2F 2017-08-22.

Enabling CFL on Subset1
   PSNR |  PSNR Cb |  PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.5330 | -12.8717 | -10.7454 |  -0.3119 | -0.3409 | -0.3415 |    -4.8720

https://arewecompressedyet.com/?job=no-cfL%402017-10-30T17%3A14%3A33.925Z&job=cfL%402017-10-30T17%3A15%3A02.467Z

Change-Id: I2b35f352366c585887aa4fb77ae5acb159d6819f

Change-Id: I35a5334972b73bdf31d6476d376af982c964a54b

Change-Id: I9f752dedfba29de9a4cfdd285c4b6dc32bd1630d