Change-Id: I56e741551f74624a84250d7565520db9c5127d1b

* Change the behaviour of search_wiener at borders to match
  the behaviour of the Wiener filter itself
* Reorder the calculation in compute_stats, saving ~5% of
  encode time at low bitrates (tested on bus_cif.y4m at 200kbps)

Change-Id: I5f649d77fd66584451aaf37697ce9c9af69524e4

* Optimize the self-guided and domaintxfmrf filters
* Save 576KiB of buffers in the encoder and decoder
* Disable self-guided filter for videos whose width or
  height is < 5, in order to help simplify the filter.

This results in an overall 30-40% improvement in decoder
speed with loop-restoration enabled (depending on source
and bitate), with no effect on video quality, *except* for
videos with width or height < 5 pixels.

Change-Id: Ide9181118ec3a63a0335338f316505b08df2d831

Enables Wiener based loop restoration only for the UV
frames. The selfguided and domaintranform filters do not
work very well for UV components, hence they are disabled.
For each UV frame a single set of wiener parameters are
sent. They are applied tile-wise, but all tiles use the
same parameters.

BDRATE (Global PSNR) results:
-----------------------------
lowres: -1.266% (up from -0.666%, good improvement)
midres: -1.815% (up from -1.792%, tiny improvement)

Tiling on UV components will be explored subsequently.

Change-Id: Ib5be93121c4e88e05edf3c36c46488df3cfcd1e2

* Remove some unused variables
* Reduce need for casts by typing intermediate buffers appropriately
* Avoid copying data which is never modified; use the original data
  instead.
* Reduce number of intermediate buffers required, saving allocations
  of 576KiB in the decoder and ~1MiB in the encoder

No effect on performance

Change-Id: I55243904dd8e818fb6d43fa431903736475d23ff

The convolve filters generated by loop_wiener_filter_tile
are not compatible with some existing convolve implementations
(they can have coefficients >128, sums of (certain subsets of)
coefficients >128, etc.)

So we implement a new variant, which takes a filter with 128
subtracted from its central element and which adds an extra copy
of the source just before clipping to a pixel (reinstating the
128 we subtracted). This should be easy to adapt from the existing
convolve functions, and this patch includes SSE2 highbd and
SSSE3 lowbd implementations.

Change-Id: I0abf4c2915f0665c49d88fe450dbc77b783f69e1

This function corrected for the fact that the old bilateral and
Wiener filters would not write to the outermost 3 pixels of the
destination. Now that the bilateral filter has been removed and
the Wiener filter has been rewritten, this is no longer necessary.

No effect on performance

Change-Id: I3f3b0a759bdb9ff1e2407affe963388e76a9c9e6

Change-Id: I4c4300f3f565d8aecf65669b77aaa874bb73a3a0

Also includes some minor renaming of macros.

Change-Id: I9493cc97c6ec9c8dae8020a05a02d6f322db9a02

Includes:
Some cleanups/refactoring
Better buffer management.
Some preps for future chrominance restoration.

Change-Id: Ia264b8989b5f4a53c0764ed3e8258ddc212723fc

This commit moves a number of large buffers from stack to heap to fix
crashes due to stack overflow.

Change-Id: I9d1592e4f6dbfa18a475d0fc5674f6d3632f39ed

The Wiener filter now uses the same convolution code as the
inter predictors.

Change-Id: Ia3bfbc778171eb25c6a0141426d1f69d92c17992

This is intended to simplify hardware and multithreaded
implementations.

Change-Id: I6aa95b67c03b794a0f3d5cf2f65c576d05f2ca7d

The parameters are optimized only on Y, so disable chrominance
filtering for now. Later we can extend the syntax to have
separate parameters for the chrominance, or optimize the
parameters jointly over luminance and chrominance components.

lowres: -0.676% (from -0.759%) becomes a little worse
midres: -1.837% (from -1.520%) substantial improvement
hdres: pending

Change-Id: I98d71f48de98394b05fd9036de259cb43d007614

The main objective is to reduce computational complexity.
The domain transform filter has an effect of edge preserving smoothing
at a lower computational cost than the bilateral filter, and can be
readily paralelized.

A little drop in coding efficiency about 0.06% for lowres, 0.16% for
midres.

Change-Id: Id949406b7e5afe9b64588d130065c63a76e4f3f9

Fixes a memory issue and computes values correctly for 1x1 and
1xn or nx1 videos.
This also fixes a test failure in AV1FrameSizeTestsLarge.OneByOneVideo.

Change-Id: Ib5a4efd094763fb6ceb119383c11f776784f58a4

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

Change-Id: Ia529701e69833d47c11b3367d5bf804eb8498079

Change-Id: Icba19c399531a6e50ab466b606b8921f9b57eae9

BUG=101

Change-Id: Ie390bab10f73ba4709e5ca7acbcde0eea537eb12

BDRATE:
lowres: -1.01% (up from -0.7%)
midres: -1.90% (up from -1.5%)
hdres:  -2.11% (up from ~1.7%)

Change-Id: I1fe04ec9ef90ccc4cc990e09cd45eea82c752e0c

BUG=webm:1334

Change-Id: I5886eec0a22a8cc056e1bdb493d2faf183816656

https://bugs.chromium.org/p/webm/issues/detail?id=1306

Change-Id: Icd11d373ff08954121c097728e4c7791791e223f

Cherry-picked from aom/master:
e2721a65

Change-Id: I4ade58be91e7bca0cc4f2bed98a43177d7f590a5

Streamilines the functions and data structures to make it
easy to add new restore options.

Change-Id: Ib00638a5749e6c38c2455f3e3142b1025e6e0624

clang-format authored Sep 19, 2016 and James Zern committed Sep 19, 2016

Change-Id: I186e90d99cd54e66d38159b7cb55a881226b1568

Includes a major refactoring/enhancement to support
tile-adaptive switchable restoration. The framework can be
readily extended to add more restoration schemes in the
future. Also includes various cleanups and fixes.

Specifically the framework allows restoration to be conducted
on tiles such that each tile can be either left unrestored, or
use bilateral or wiener filtering.

There is a modest improvemnt in coding efficiency (0.1 - 0.2%).

Further enhancements will be added subsequently to improve coding
efficiency and complexity.

Change-Id: I5ebedb04785ce1ef6f324abe209e925c2d6cbe8a

clang-format authored Sep 07, 2016 and James Zern committed Sep 15, 2016

Change-Id: If22018f8911d9d7ee99c2127bdfcc56e42b0e2d7

Some minor adjustments to tile size and bilateral filters.

About 0.1% improvement for midres and hdres, very small change for
lowres.

Change-Id: Ia94f68a926867dfd67da1a8795fd8de0ddd8e2d6

Change-Id: I2b2b70e756b7eb9611b7b33b7d5f19b3b30e0a50

Cherry-Picked the following commits:
0defd8f2 Changed "WebM" to "AOMedia" & "webm" to "aomedia"
54e66767 Replace "VPx" by "AVx"
5082a369 Change "Vpx" to "Avx"
7df44f17 Replace "Vp9" w/ "Av1"
967f722f Remove kVp9CodecId
828f30ce Change "Vp8" to "AOM"
030b5ffc AUTHORS regenerated
2524caee Add ref-mv experimental flag
016762be Change copyright notice to AOMedia form
81e55269 Replace vp9 w/ av1
9b94565b Add missing files
fa8ca9f2 Change "vp9" to "av1"
ec838b76  Convert "vp8" to "aom"
80edfa01 Change "VP9" to "AV1"
d1a11fb9 Change "vp8" to "aom"
7b582513 Point to WebM test data
dd1a5c8d Replace "VP8" with "AOM"
ff00fc0f Change "VPX" to "AOM"
01dee0bb Change "vp10" to "av1" in source code
cebe6f0c Convert "vpx" to "aom"
17b05679 rename vp10*.mk to av1_*.mk
fe5f8a8a rename files vp10_* to av1_*

Change-Id: I6fc3d18eb11fc171e46140c836ad5339cf6c9419

Manually cherry-picked commits:
ceef0583 libvpx->libaom part2
3d26d916 libvpx -> libaom
cfea7dd7 vp10/ -> av1/
3a8eff73 Fix a build issue for a test
bf4202ed Rename vpx to aom

Change-Id: I1b0eb5a40796e3aaf41c58984b4229a439a597dc

Frame can be split into rectangular tiles for application of separate
bilateral or Wiener filters per tile. Some variable names changed for
better readability.

Change-Id: I13ebc4d0b0baf368e524db5ce276f03ed76af9c8

clang-format authored Aug 11, 2016 and James Zern committed Aug 12, 2016

Change-Id: I01d8241eba3ccaf4d06c00a51df2d17c126f6f9d

Manually cherry-picked the following changes:
8c8d16de vp9 -> vpx in names
75b57d39 VP9_ -> VPX_ in function names
761a7088 VP9_INTERP_EXTEND -> VPX_INTERP_EXTEND
4273a52c VP9->VPX in border pixel macros
03568c31 VP9_FRAME_MARKER -> VPX_FRAME_MARKER
2334f51d VP9->VPX in fdct function names

Change-Id: Icc18dbf4b416dd0fa21033b3e19ab8a47c893508

Adds a wiener filter based restoration scheme in loop which can
be optionally selected instead of the bilateral filter.

The LMMSE filter generated per frame is a separable symmetric 7
tap filter. Three parameters for each of horizontal and vertical
filters are transmitted in the bitstream. The fourth parameter
is obtained assuming the sum is normalized to 1.
Also integerizes the bilateral filters, along with other
refactoring necessary in order to support the new switchable
restoration type framework.

derflr: -0.75% BDRATE

[A lot of videos still prefer bilateral, however since many frames
now use the simpler separable filter, the decoding speed is
much better].

Further experiments to follow, related to replacing the bilateral.

Change-Id: I6b1879983d50aab7ec5647340b6aef6b22299636

And enabled the warning flag in configure for vp10.

Change-Id: If556d6fac65755af3d6ed7fe71b8eca0ef1b1965

Change-Id: Iab517862d957f3aa2a664e9349d57bbf424febb3