Make I420ToARGB1555, I420ToARGB4444 and I420ToRGB565 call a single function per row, which may be implemented in assembly, but for now the function calls 2 functions internally.
BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/965006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@459 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/936009

git-svn-id: http://libyuv.googlecode.com/svn/trunk@458 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=133
TEST=still builds
Review URL: https://webrtc-codereview.appspot.com/964006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@457 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=138
TESTED=sudo LIBYUV_REPEAT=1000 nice --5 ./libyuv_unittest --gtest_filter=*M420* | sed 's/\(.*(\)\([0-9]*\)\( ms)\)/\2 - \1\2\3/g' | sort -rn | grep ms
Review URL: https://webrtc-codereview.appspot.com/935009

git-svn-id: http://libyuv.googlecode.com/svn/trunk@456 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=137
TEST=hammer builds
Review URL: https://webrtc-codereview.appspot.com/930006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@455 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/937010

git-svn-id: http://libyuv.googlecode.com/svn/trunk@454 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=137
TEST=NONE
Review URL: https://webrtc-codereview.appspot.com/929010

git-svn-id: http://libyuv.googlecode.com/svn/trunk@453 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=136
TEST=sudo LIBYUV_REPEAT=1000 nice --5 ./libyuv_unittest --gtest_filter=*565* | grep ms
Review URL: https://webrtc-codereview.appspot.com/965004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@452 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=libyuvTest.I420ToNV12_Any
Review URL: https://webrtc-codereview.appspot.com/937005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@451 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none

git-svn-id: http://libyuv.googlecode.com/svn/trunk@450 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=126
TESTED=tested by mips
Review URL: https://webrtc-codereview.appspot.com/930005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@449 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=126
TEST=local test by mips
Review URL: https://webrtc-codereview.appspot.com/932006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@448 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=135
TESTED=unitest I420ToNV12
Review URL: https://webrtc-codereview.appspot.com/943006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@447 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/928008

git-svn-id: http://libyuv.googlecode.com/svn/trunk@446 16f28f9a-4ce2-e073-06de-1de4eb20be90

Fix valgrind error on I420ToNV12.  Do any conversions first, and work toward fastest, which produces more stable results for the tests that matter.
BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/938005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@445 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=135
TEST=/libyuv_unittest --gtest_filter=*NV*
Review URL: https://webrtc-codereview.appspot.com/939005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@444 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=planar unittests
Review URL: https://webrtc-codereview.appspot.com/935006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@443 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/935004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@442 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/934004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@441 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none

git-svn-id: http://libyuv.googlecode.com/svn/trunk@440 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=convert_test
Review URL: https://webrtc-codereview.appspot.com/932004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@439 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/924005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@438 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/922007

git-svn-id: http://libyuv.googlecode.com/svn/trunk@437 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/918006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@436 16f28f9a-4ce2-e073-06de-1de4eb20be90

Neon version of I420ToNV12 and I420ToNV21.  NV21ToI420 added as function.  CopyRow changed to vld4.8 to allow unaligned copy.
BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/922005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@435 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/920005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@434 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=125
TESTED=local build with gtest errors disabled
Review URL: https://webrtc-codereview.appspot.com/924004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@433 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=126
TEST=NONE
Review URL: https://webrtc-codereview.appspot.com/918005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@432 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=unittests
Review URL: https://webrtc-codereview.appspot.com/917006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@431 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/914005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@430 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/921004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@429 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=114
TEST=libyuvTest.I420ToRGB565_Any
Review URL: https://webrtc-codereview.appspot.com/919004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@428 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/916004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@427 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=126
TEST=convert tests NV12 with alignments
Review URL: https://webrtc-codereview.appspot.com/896007

git-svn-id: http://libyuv.googlecode.com/svn/trunk@426 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/898004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@425 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/887006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@424 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=107
TEST=convert_test
Review URL: https://webrtc-codereview.appspot.com/892004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@423 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/895004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@422 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=build on x86 linux
Review URL: https://webrtc-codereview.appspot.com/889005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@421 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/881004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@420 16f28f9a-4ce2-e073-06de-1de4eb20be90