Fix chroma output when scaling

The encode-side scaling was not indexing through the image correctly
for the chroma planes, causing a green checkerboard-like output in
the unit test.

Change-Id: I9abbd73615404cd6699588be3e64dcf59005bc14
Fix row tiling.

Change-Id: I57be4eeaea6e4402f6a0cc04f5c6b7a5d9aedf9b
Enable mmx loop filter routines

The mmx routines work as expected for the loop filter, so enable them.

Change-Id: I2bbd9b99a4445fcba17bb95002f1fb6e01fe8f85
Fix compile warnings on windows.

Change-Id: If74bc6110016bc75ea3883ab136fbbac88f6a913
Remove some unused loopfilter code

This code is unreachable, and not useful for later reference.

Change-Id: I4c9a9e0fbf859c1081bbcfbcda9710afb4b4741f
Remove unused vp9_idct_add_{y,uv}_block

These functions are not used, and appear to have been superceded.

Change-Id: I86fe51b088264f6b1b8d4d232bba97b371b98120
Merge "Fix chroma output when scaling"
Merge "Fix row tiling."
Merge "Enable mmx loop filter routines"
Merge "Fix compile warnings on windows."
Merge changes I86fe51b0,I4c9a9e0f

* changes:
  Remove unused vp9_idct_add_{y,uv}_block
  Remove some unused loopfilter code
Quick modifications to wide loopfilter intrinsic functions

Modified to work with 8x8 blocks of memory.  Will revisit
later for further optimizations.  For the HD clip used, the
decoder improved my 20%.

Change-Id: Ia0057f55d66d1445882351ea6c43b595a5a980e5
Implement SSE version for sad4x8x4d and SSE2 version for sad8x4x4d.

Encoding time of crew (CIF, first 50 frames) @ 1500kbps goes from 4min56
to 4min42.

Change-Id: I92c0c8b32980d2ae7c6dafc8b883a2c7fcd14a9f
Merge "Quick modifications to wide loopfilter intrinsic functions"
vpxdec: add --loops option

Allows vpxdec to operate multiple times on the same input. Mostly
useful for debugging/development.

Change-Id: Icf25ece22e387052eade4438971eee5ff4f798ba
Quick modifications to mb loopfilter intrinsic functions

Modified to work with 8x8 blocks of memory.  Will revisit
later for further optimizations.  For the HD clip used, the
decoder improved by almost 20%.

Change-Id: Iaa4785be293a32a42e8db07141bd699f504b8c67
Remove unused need_to_clamp_mvs

This flag no longer needed.

Change-Id: If13482015ddb92d225792ea5c0ee455d2285d1f6
Add vp9 test vectors unit test

These files can stand in until we get proper syntax vectors. They
should provide some additional assurance against inadvertant
bitstream changes.

Change-Id: I12f6c9a5f054e30df40a7ff1f33145abf7e1d59d
libs.mk: allow tests to be sharded

Creates test_shard.#n [0,9] targets, usable with make -j [jobs]

Change-Id: Ied86dcc89ae72d1690564aa0dd86de10e06d25f9
Merge "libs.mk: allow tests to be sharded"