Change Sobel to use JPeg Luma calculation instead of extracting G channel.  Using luma produces a better sobel that respects all 3 channels of RGB.  Historically the G channel was used to improve performance, and because the luma of I420 is a constrained range, hurting quality.  Using the JPeg variation of YUV, the luma is more accurate, including cross platform, better optimized for AVX2 and odd widths, and full range.
BUG=444
TESTED=ARGBSobelXY_Opt
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/57479004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1414 16f28f9a-4ce2-e073-06de-1de4eb20be90

Scale Down by factor tests scale down to specified ratio rather than up.  This ensures the alignment constrains on the destination dont cause a different factor to be used.
BUG=431
TESTED=libyuvTest.ScaleDownBy3_Bilinear
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/47309004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1413 16f28f9a-4ce2-e073-06de-1de4eb20be90

odd width support for scale by even scale factor and box scale down by 4.  scale down by 4 uses scale down by 2 internally.
BUG=431
TESTED=libyuvTest.ARGBScaleDownBy4_Bilinear

Review URL: https://webrtc-codereview.appspot.com/57399004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1412 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=431
TESTED=ARGBScaleDownBy4_Box

Review URL: https://webrtc-codereview.appspot.com/57409004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1411 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=431
TESTED=libyuvTest.ARGBScaleDownBy2_Bilinear

Review URL: https://webrtc-codereview.appspot.com/52569004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1410 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=440
TESTED=ninja -C out\Release_x64
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/46259004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1407 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=415
TESTED=ncval.exe newlib/Release/nacltest_arm.nexe
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/46229005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1406 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=439
TESTED=out\release\libyuv_unittest --gtest_filter=*I420ToARGB_Opt
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/55389004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1405 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=437
TESTED=local ios build

Review URL: https://webrtc-codereview.appspot.com/47129004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1404 16f28f9a-4ce2-e073-06de-1de4eb20be90

psnr tool, work around for ios 64 bit compiler where int passed into assembly needs to be explicitely cast to 'w' register.
BUG=437
TESTED=untested
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/53389004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1403 16f28f9a-4ce2-e073-06de-1de4eb20be90

work arounds for ios 64 bit compiler where int passed into assembly needs to be explicitely cast to 'w' register.
BUG=437
TESTED=local ios build
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/49289004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1402 16f28f9a-4ce2-e073-06de-1de4eb20be90

row_neon64 additional fixes for warning on ios where int doesnt match %2 size which is 64 bit by default.  change size to explicitely 32 bit with %w2.
BUG=437
TESTED=try bots

Review URL: https://webrtc-codereview.appspot.com/43349004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1401 16f28f9a-4ce2-e073-06de-1de4eb20be90

row_neon64 fix for warning on ios where int width doesnt match %2 size which is 64 bit by default.  change size to explicitely 32 bit with %w2.
BUG=437
TESTED=try bots
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/47119004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1399 16f28f9a-4ce2-e073-06de-1de4eb20be90

scale 64 bit fix for warning on ios where int width doesnt match %2 size which is 64 bit by default.  change size to explicitely 32 bit with %w2.
BUG=437
TESTED=try bots
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/43339004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1398 16f28f9a-4ce2-e073-06de-1de4eb20be90

fix for warning on ios 64 bit that int width doesnt match %2 size which is 64 bit by default.  change size to explicitely 32 bit with %w2.
BUG=437
TESTED=try bots
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/49279004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1397 16f28f9a-4ce2-e073-06de-1de4eb20be90

depot_tools excludes these source files now, so they need to be manually
included.
BUG=435
TESTED=clangcl local build on windows
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/52419004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1396 16f28f9a-4ce2-e073-06de-1de4eb20be90

depot_tools excludes these source files now, so they need to be manually
included.
BUG=435
TESTED=clangcl local build on windows
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/49879004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1395 16f28f9a-4ce2-e073-06de-1de4eb20be90

make windows code built with clangcl include the _posix source code.  depot_tools excludes these source files now, so they need to be manually included.
BUG=435
TESTED=clangcl local build on windows
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/46199004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1394 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=434
TESTED=gclient sync and do build with vs2015
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/47079004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1393 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=libyuv:432
TESTED=try bots
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/49249004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1392 16f28f9a-4ce2-e073-06de-1de4eb20be90

scale to 3/4 bug fix for odd widths.  multiply to index into source by scale factor should be 4 / 3 not 3 / 4.
BUG=433
TESTED=set LIBYUV_WIDTH=1276 out\release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=*.Scale*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/49219004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1391 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=314
TESTED=out\release\libyuv_unittest --gtest_filter=*.ScaleDownBy4*

Review URL: https://webrtc-codereview.appspot.com/46159004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1390 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=432
TESTED=local win64 build
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/48289004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1389 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=432
TESTED=untested
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/48279004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1388 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=432
TESTED=try bots
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/51779004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1387 16f28f9a-4ce2-e073-06de-1de4eb20be90

enable chromium_code=1 to increase warning level.  this will enable the same warnings as when built within chrome, helping avoid breakage in future.
BUG=432
TESTED=local windows build
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/49839004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1386 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=libyuv:432
TESTED=local windows build with chromium_code =1
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/49849004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1385 16f28f9a-4ce2-e073-06de-1de4eb20be90

This is needed for some Rietveld functionality
to work properly. Currently there's an error in the
area handling the CQ for libyuv CLs.

TBR=fbarchard@google.com

Review URL: https://webrtc-codereview.appspot.com/48269004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1384 16f28f9a-4ce2-e073-06de-1de4eb20be90

This is needed in order to be able to commit when
working from a pure Git checkout, since the Git updater
is configured to sync using a http-URL
(in services/cron/git_updater/project_config.py)

Being able to use a pure Git checkout is a natural step
towards switching over libyuv to Git.

BUG=476598
TBR=fbarchard@google.com
TESTED=gclient config https://chromium.googlesource.com/external/libyuv --name=trunk
gclient sync
git auto-svn
# create local branch and edit
git cl upload
git cl dcommit

Review URL: https://webrtc-codereview.appspot.com/46119004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1383 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=430
TESTED=untested
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/49799004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1382 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=430
TESTED=local ios 64 bit build
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/47039004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1381 16f28f9a-4ce2-e073-06de-1de4eb20be90

scale to 3/4 or 3/8 with odd width destinations efficiently.  previously if width was not multiple of what the simd loop would do (24), scaling would fall back on slower C code.  This change allows SIMD to be used for most of the scaling and C for the remainder, improving efficiency.
BUG=314
TESTED=set LIBYUV_WIDTH=1896 & ScaleDownBy3by4_*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/48249004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1380 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=local unittests pass
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/45129004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1379 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=untested
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/49769004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1378 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=425
TESTED=out\release\libyuv_unittest_old --gtest_filter=*.ScaleDownBy3_*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/45219004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1377 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=422
TESTED=untested
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/43229004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1374 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=427
TESTED=out\release\libyuv_unittest --gtest_filter=*.ScaleDownBy4_*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/51689004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1373 16f28f9a-4ce2-e073-06de-1de4eb20be90

make box filter upsampler consider a pixel width of less than 1 to be 1.  This makes it behave as a point sampler.
BUG=428
TESTED=set LIBYUV_WIDTH=1900 && out\release\libyuv_unittest.exe
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/49709004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1372 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=lint passes

Review URL: https://webrtc-codereview.appspot.com/46919004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1371 16f28f9a-4ce2-e073-06de-1de4eb20be90

Add a scale down by 3 test for testing general purpose box/bilinear with scale factor of 3, but allowing width/height specified to do odd with testing.
BUG=libyuv:427
TESTED=libyuvTest.ScaleDownBy3*
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/45169004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1370 16f28f9a-4ce2-e073-06de-1de4eb20be90