The memset to 0 wasn't required because the temporary variable is only
written to, before being read in the next function call.

Tested:
./test_libaom --gtest_filter=*SelfguidedFilterTest*

Change-Id: Ie1628d43b050744ae97a8be55f551edb602b018b

Sebastien Alaiwan authored Apr 12, 2017 and James Zern committed Apr 12, 2017

Rename '--enable-aom-highbitdepth' to '--enable-highbitdepth'

Change-Id: I1de13c3508c30c552532993419d8ace326142ab6

This filter was temporarily removed due to test failures.
This patch reintroduces the filter and fixes two bugs:

* The test cases would occasionally segfault on x86, since
  the highbd filter requires its inputs to be aligned to
  16 bytes. This will always be true when used on real videos,
  so adjust the test cases to match.

* The function calc_block was incorrect for bit_depth > 8,
  due to passing an incorrect argument to _mm_srl_epi32().
  This was the cause of the original test failures.

BUG=aomedia:392

Change-Id: Ia06b76c3e6122eebadd0995fb62f32c2fcab8b3e

Change-Id: I035d4a3b14e6c56a55b06dea57b4a49cd161e69f

Patch https://aomedia-review.googlesource.com/c/8387/ introduced
some bugs into the self-guided filter correctness test. One bug
was fixed in https://aomedia-review.googlesource.com/c/8445/ ,
but another surfaced while developing
https://aomedia-review.googlesource.com/c/8480/

This patch tidies up the relevant code to make it clearer,
and should fix the remaining bug(s).

Change-Id: I7a5957b02f0ad309aa4081c72d490d7369c8d90a

Performance is very similar to the lowbd path (only 4-5% slower)

Change-Id: Ifdb272c3f6c0e6f41e7046cc49497c72b5a796d9

The commit increase size of a few heap allocations to make sure later
access is not out of bounds.

BUG=aomedia:383

Change-Id: Iadb08faa1e55be361dd3d4adaafeb85cecf23bbb

By rearranging the code in restoration.c, we can allow the
encoder to use the SSE4.1 version of the self-guided filter
while picking the loop-restoration filter.

This also helps us prepare for adding a highbitdepth SSE4.1
version of the self-guided filter.

No effect on encoder output, but gives an end-to-end speedup
of 1-2%.

Change-Id: Id17ba4a0963ddce9f70a7cae666e212e138d5f2c

Adjust the vectorized filter so that it can handle tile widths
which are not a multiple of 4, so we do not have to fall back
to the C version of the filter.

Negligible speed impact for tiles with widths which are multiples
of 4, and greatly improves speed on tiles with non-multiple-of-4
widths.

Change-Id: Iae9d14f812c52c6f66910d27da1d8e98930df7ba

Add an SSE4.1 lowbd version of the self-guided filter for
loop-restoration, and apply some optimizations to the C
version.

Approximate times per 128x128 / 256x256 tile on the machine
this was developed on:
Previous C:  620us / 2800us
Optimized C: 500us / 2200us ( 24% /  27% faster)
SSE4.1:      147us / 600us  (320% / 370% faster)

Change-Id: I23ff5a5482a191aeb06f9d1f767a9f036bb357fe