Fix a rare case in which the tile boundary information was not
set up properly in the decoder when using LOOPFILTERING_ACROSS_TILES

The situation was:
* One frame uses loop filtering across tiles. Then its tile
  boundary information is not needed, so is not calculated.
* The next frame (in decode order) has the same size and the
  same tile layout, but doesn't use loop filtering across tiles.
* Now the tile boundary information *is* needed, but we weren't
  recalculating it. This resulted in the loop filter being
  applied across tile boundaries even though we signalled not to.

Since the conditions on when we can reuse the previous frame's
boundary information are complex, and the overhead of calculating
the tile boundaries is low, we avoid this issue by simply
recalculating the boundary information each frame.

Change-Id: I1f3cbb0537535bf38faaed4c21c07142e747f962

third_party/fastfeat/fast_9.c: In function ‘fast9_score’:
‘for’ clause does not guard... [-Wmisleading-indentation]
     for(n=0; n < num_corners; n++)
     ^~~
third_party/fastfeat/fast_9.c:2972:2: note: ...this statement, but the
latter is misleadingly indented as if it is guarded by the ‘for’
  return scores;
  ^~~~~~

Change-Id: Ie35cedd8a647a699c97066b930efd261d6906162

Change-Id: I65f2f5d797ac11a0e270ac44146bba78b2e8e569

Changes:
- Add block size define.
- Set default to mean filtering.
- Add flag in AV1_COMP for bgsprite.
- Determine to use bgsprite or not based on firstpass metrics in
define_gf_group.
- Add outlier removal for bgsprite mean blending (off by default)

Results:
lowres: -0.009 avg_psnr, -0.029 ovr_psnr, -0.102 ssim

Clips with maximum gain:
- brdige_far_cif: -2.071 avg_psnr, -2.409 ovr_psnr, -1.977 ssim
- deadline_cif: -0.148 avg_psnr, -0.137 ovr_psnr, -0.113 ssim
- brdige_close_cif: +1.741 avg_psnr, -0.258 ovr_psnr, -2.534 ssim

Change-Id: I809406020f7786e49cc80329511e22d25379d7a2

Update cdf after each superblock being finalized, and re-compute
symbol costs. Affected symbols include prediction parameters,
tx type, and new motion vector.
BDRate: -0.121% lowres, -0.089% midres

Change-Id: I005ef382762d6e3423f933cca0a0b7b40288e8bf

Change-Id: I3259fbec7167e311f0bd12e309a227d9643bc86f

When 64x64 transforms are enabled, it should return TX_64x64.

Midres set:
Small PSNR improvement overall (-0.061%),
But 3 clips have large gains (-1.0% to -0.4% range)

Change-Id: Ic2a1f0213449f81213219479c6b6aa0acfaac2e7

Patch 323d535d fixes the reported bug but doesn't correctly read a
global transformation of type TRANSLATION or AFFINE. Fortunately,
clang gives a warning about the ignored expression.

Change-Id: I1127d5d5b809bf016872a3ba97903599869d5357

Change-Id: I9d26f288657a15e3d0ec4c5a11e80aecc1a829ad

Related to ext_refs, ext_comp_refs, and altref2

Change-Id: I35296a5a49d5200316760359da52a7803cd7207e

For the tool of ext-comp-refs

Change-Id: I5a64b2206b34b3b18ca897b1d711533a4525a7f0

This give us 0.16% gain on lowres

Change-Id: Iaf1932dc54a3e6eeb2e2efa2872222df2a08257e

Change-Id: I87ac57ad0ff1dcf926596f63420827531c6fd04d

Change-Id: I7b0e998182b522274768e4b587080d8e88f3a223

This addresses style warnings introduced in
0cf4d9f1

Change-Id: I864ab5397024ee1db7b44307e5320c370e1d50ad

No coding performance changes; small encoding speed increase.

Change-Id: Ie459ee0ac549d15c2d5c713f733e67f2191f6b7a

Avoid silent failures resulting in endless build loops.

BUG=aomedia:701

Change-Id: I76d3e0bdddf473fc364abf0c956fcad5f7e3103c

BUG=aomedia:693

Change-Id: I09b34abc41ee6f85619f5a05f668e06491e542f0

The logic that searches for motion vectors in scan_row_mbmi and
scan_col_mbmi steps in 4x4 units when the block size is less than
8x8. That test (bsize < BLOCK_8X8) doesn't work when you have 16X4 or
4X16 blocks, because they appear higher up in the enum.

Change-Id: Idb1a97f8a43b675fd78dbc76ae501fcdff7adbcd

Angie Chiang authored 7 years ago and James Zern committed 7 years ago

Turn off the assertion because av1_init_lv_map doesn't pass the
count according to the position into get_base_ctx_from_count_mag()

The speeding-up optimize_txb is still on-going.
I will turn the assertion on once the speeding-up process is
getting to a milestone.

BUG=aomedia:704

Change-Id: I0119bf825bedc1fccbe4963f341a17f0e2601d02

This will allow the mrc-tx experiment to pass in its own color map
and set of probabilities to the tokenize and bit packing functions.
The corresponding change on the decoder side will come in a followup
shortly.

No change in performance.

Change-Id: I1872b7f1b1cf5b102e6289388ce1ae449e67cb4d

There are six pieces of code in reconinter.c and two in rdopt.c which
iterate over the blocks along the top or left edge of the current
block for OBMC. Before this patch, each bit of code has its own
implementation of the iteration, which is reasonably finicky to get
right.

This patch factors out that logic into a pair of helpers
(foreach_overlappable_nb_above and foreach_overlappable_nb_left). The
functions take a "fun" parameter, which contains the loop body. Note
that the iteration is too complicated for us to be able to define a
macro that could be used like

  FOREACH_NB_ABOVE(rel_pos, nb_size, nb_mi) { ... }

While C's syntax doesn't seem to let you do that, once the compiler's
optimisation pass is done inlining everything, the results are
essentially the same.

The iteration logic is also slightly generalised: the old code checked
whether a block was shorter or narrower than 8 pixels by comparing a
block size with BLOCK_8X8. This doesn't work when you have a 4x16 or
16x4 block because e.g. BLOCK_16X4 is not less than BLOCK_8X8. This
generalisation is (unsurprisingly) needed in order to to support 16x4
or 4x16 blocks.

This patch doesn't address the CONFIG_NCOBMC functions in reconinter.c
that do prediction from right and bottom edges.

This patch shouldn't affect the generated bitstream in any way: the
code is supposed to be equivalent.

Change-Id: I9e5a116b012c18645604a7d98fb98be99697d363

Make it explicit that:
- forward tx is using the matrix
- inverse tx is using the transposed matrix

Change-Id: Ia9507f4f68397b07b6fd1868bb421bb9d5dd817d

The selfguided filter code was sometimes fetching 8 bytes of data
when it only needed 4. This was normally fine, but lead to problems
in the selfguided filter test when compiling for x86-32, where we
accidentally read off the end of the input buffer.

Fix this by only reading the amount of data we actually need.

BUG=aomedia:700

Change-Id: I2448b7b0d9cb2f9292a092675a66da64c89f913c

This reverts commit 38cdce8e.

Reason for revert: <INSERT REASONING HERE>

It is reported that this introduced a segment fault, revert now to investigate. 

Change-Id: I229dcdc09462ae4eb9cf2a3da4ce59aa9eafe65e

Change-Id: I5da893be07b3b9aa4351b5bb1af987f4992370ef

This is undefined behaviour in C and might confuse the optimizer, leading to incorrect code.

Change-Id: Ia4bb60478068da678f013bdd6ab6a49814d89ebe

Improves reconstruction performance.

Change-Id: Ia30a345e1f5d4e450138c1dd3a7b700119c7de31

Change get_lgt in order to integrate a later experiment
lgt_from_pred with lgt. There are two main changes.

The main purpose for this change is to unify get_fwd_lgt and
get_inv_lgt functions into a get_lgt function so the lgt basis
functions can always be selected through the same function in
both forward and inverse transform paths. The structure of those
functions will also be consistent with the get_lgt_from_pred
functions that will be added in the lgt-from-pred experiment.

These changes have no impact on the bitstream.

Change-Id: Ifd3dfc1a9e1a250495830ddbf42c201e80aa913e

Make the lv-map rate-distortion optimization account for the
per symbol cdf update. This improves the level map coding
performance by 0.4%.

Change-Id: I1cbecafbad4e6642abc3782c9741636d92d87eb7

Change-Id: Icdce2ac2203bacdcbbbf17d1fc3308dc1ed15974

Change-Id: Ife4e7e4f62b217fd55db1ec3ef69c243f1651777

Allow per symbol cdf probability model update in the lv-map
encoding process.

Change-Id: Id0c4a659c04ffa981d8f04537eda2f1304d1682a

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

Change-Id: Id58bf86fb1c7c72dd14ddaa3781caaa27f446ef7

Initialize the cdf model for level map syntax elements.

Change-Id: I3865e07c126eb4c856803c12485b05782dea6526

When frame-superres is used with loop-restoration use a 4-tap
upscaler to reduce complexity.

Change-Id: Idf5712b9a006763c4000e264176b04aa8331b12f

Change-Id: Iec280ba1e314849ac027085f61e62a48dd224be4

Change-Id: I1b789acc18f1e69fb5db069ccd8bd17815938e9d

Change-Id: I3cc9cb8135ec5e8aa20c8cff901a2f37b3b459ee

BUG=aomedia:685

Change-Id: I0698b281fbaff2e77a50f5dc9a10d752de6c6f79