Fix memory overwrite in YUY2ToNV12 odd wdiths

Fix memory overwrite in YUY2ToNV12 odd wdiths

When width was odd Y channel wrote an extra pixel.
This change splits the Y from UV into a temporary
buffer and memcpy's to the destination.  Performance
is slower.

Was
YUY2ToNV12_Any (307 ms)
YUY2ToNV12_Unaligned (213 ms)
TestYUY2ToNV12 (181 ms)
YUY2ToNV12_Opt (177 ms)
YUY2ToNV12_Invert (177 ms)

Npw
YUY2ToNV12_Any (300 ms)
YUY2ToNV12_Unaligned (226 ms)
YUY2ToNV12_Invert (206 ms)
TestYUY2ToNV12 (184 ms)
YUY2ToNV12_Opt (181 ms)
TBR=harryjin@google.com
BUG=libyuv:545
Committed: https://chromium.googlesource.com/libyuv/libyuv/+/58cb534962b86fc1b673a8f0835e98852a1754ff

[fbarchard, 2016-01-19 18:34:02]

Description was changed from

==========
fix for memory overwrite in yuy2tonv12

R=harryjin@google.com
BUG=libyuv:545
==========

to

==========
Fix memory overwrite in YUY2ToNV12 odd wdiths

When width was odd Y channel wrote an extra pixel.
This change splits the Y from UV into a temporary
buffer and memcpy's to the destination.  Performance
is slower.

Was
YUY2ToNV12_Any (307 ms)
YUY2ToNV12_Unaligned (213 ms)
TestYUY2ToNV12 (181 ms)
YUY2ToNV12_Opt (177 ms)
YUY2ToNV12_Invert (177 ms)

Npw
YUY2ToNV12_Any (300 ms)
YUY2ToNV12_Unaligned (226 ms)
YUY2ToNV12_Invert (206 ms)
TestYUY2ToNV12 (184 ms)
YUY2ToNV12_Opt (181 ms)
R=harryjin@google.com
BUG=libyuv:545
==========

[fbarchard, 2016-01-19 18:34:26]

Description was changed from

==========
Fix memory overwrite in YUY2ToNV12 odd wdiths

When width was odd Y channel wrote an extra pixel.
This change splits the Y from UV into a temporary
buffer and memcpy's to the destination.  Performance
is slower.

Was
YUY2ToNV12_Any (307 ms)
YUY2ToNV12_Unaligned (213 ms)
TestYUY2ToNV12 (181 ms)
YUY2ToNV12_Opt (177 ms)
YUY2ToNV12_Invert (177 ms)

Npw
YUY2ToNV12_Any (300 ms)
YUY2ToNV12_Unaligned (226 ms)
YUY2ToNV12_Invert (206 ms)
TestYUY2ToNV12 (184 ms)
YUY2ToNV12_Opt (181 ms)
R=harryjin@google.com
BUG=libyuv:545
==========

to

==========
Fix memory overwrite in YUY2ToNV12 odd wdiths

When width was odd Y channel wrote an extra pixel.
This change splits the Y from UV into a temporary
buffer and memcpy's to the destination.  Performance
is slower.

Was
YUY2ToNV12_Any (307 ms)
YUY2ToNV12_Unaligned (213 ms)
TestYUY2ToNV12 (181 ms)
YUY2ToNV12_Opt (177 ms)
YUY2ToNV12_Invert (177 ms)

Npw
YUY2ToNV12_Any (300 ms)
YUY2ToNV12_Unaligned (226 ms)
YUY2ToNV12_Invert (206 ms)
TestYUY2ToNV12 (184 ms)
YUY2ToNV12_Opt (181 ms)
TBR=harryjin@google.com
BUG=libyuv:545
==========

[fbarchard1, 2016-01-19 19:28:12]

Description was changed from

==========
Fix memory overwrite in YUY2ToNV12 odd wdiths

When width was odd Y channel wrote an extra pixel.
This change splits the Y from UV into a temporary
buffer and memcpy's to the destination.  Performance
is slower.

Was
YUY2ToNV12_Any (307 ms)
YUY2ToNV12_Unaligned (213 ms)
TestYUY2ToNV12 (181 ms)
YUY2ToNV12_Opt (177 ms)
YUY2ToNV12_Invert (177 ms)

Npw
YUY2ToNV12_Any (300 ms)
YUY2ToNV12_Unaligned (226 ms)
YUY2ToNV12_Invert (206 ms)
TestYUY2ToNV12 (184 ms)
YUY2ToNV12_Opt (181 ms)
TBR=harryjin@google.com
BUG=libyuv:545
==========

to

==========
Fix memory overwrite in YUY2ToNV12 odd wdiths

When width was odd Y channel wrote an extra pixel.
This change splits the Y from UV into a temporary
buffer and memcpy's to the destination.  Performance
is slower.

Was
YUY2ToNV12_Any (307 ms)
YUY2ToNV12_Unaligned (213 ms)
TestYUY2ToNV12 (181 ms)
YUY2ToNV12_Opt (177 ms)
YUY2ToNV12_Invert (177 ms)

Npw
YUY2ToNV12_Any (300 ms)
YUY2ToNV12_Unaligned (226 ms)
YUY2ToNV12_Invert (206 ms)
TestYUY2ToNV12 (184 ms)
YUY2ToNV12_Opt (181 ms)
TBR=harryjin@google.com
BUG=libyuv:545

Committed:
https://chromium.googlesource.com/libyuv/libyuv/+/58cb534962b86fc1b673a8f0835...
==========

[fbarchard1, 2016-01-19 19:28:12]

Committed patchset #2 (id:20001) manually as
58cb534962b86fc1b673a8f0835e98852a1754ff (presubmit successful).