Fixed best error reported by loop filter selection, this value is used
during loop restoration to pick best mode. Baseline remains unchanged,
change in BDRate for loop restoration experiment:
-0.628 -> -0.625 for lowres,
-1.262 -> -1.283 for highres.

Change-Id: I69ef1608bc232b250ac46f59e31fdbed1a999dcd

- For experiment EXT_INTERP under high bit depth.
- Add unit test to verify bit-exact.
- Speed performance improvement:
  On Xeon E5-2680, park_joy_1080p_12.y4m, 50 frames, encoding time
  drops from 6682503 ms to 5390270 ms.

Change-Id: Iea4debf5414f3accf1eb5672abeab56a0539ac77

Name 'wsrc', 'mask' and 'pre' explicitly, rather than
using 'b', 'm' and 'a'.

Change-Id: Iaee6d1ac1211b0b05b47cf98b50570089b12d600

* changes:
  vp10/encoder/rdopt.c: make a function static
  vp10/encoder/rd.c: make a function static
  vp10_convolve_ssse3.c: make some functions static
  vp10/encoder/bitstream.[hc]: correct a prototype
  vp10/common/idct.h: add some missing prototypes
  highbd_quantize_intrin_sse2.c: add missing rtcd include
  vp10: add some missing includes

+ remove vp10_ prefix

quiets a -Wmissing-prototypes warning

BUG=b/29584271

Change-Id: I8821c38009b90296280f9b14233e73c92076e81f

+ remove vp10_ prefix

quiets a -Wmissing-prototypes warning

BUG=b/29584271

Change-Id: I6b5d71f8120a6d1fee4c782beb4c6d6eef980f65

quiets -Wmissing-prototypes warnings

BUG=b/29584271

Change-Id: I4d2eb7f4b45d7b829421976641b3212bcf29e7dd

quiets a -Wmissing-prototypes warning

BUG=b/29584271

Change-Id: I91aba2a75dccd6752bdf91837564c2aa45817c09

quiets the warning of the same name

BUG=b/29584271

Change-Id: I220cd58e1060f77e3910472fed1b167add3a08f8

quiets -Wmissing-prototypes warnings

BUG=b/29584271

Change-Id: Iff5214df0d1781810afbfc20bfaf664f109e2f29

quiets some -Wmissing-prototypes warnings

BUG=b/29584271

Change-Id: I9174728459fcabb6d9ac0028ae58029e52c0da92

Change-Id: Iaf8c6f0b1e340f0406df2871a3dc2ded19b7009a

Use vpx_blend_a64_hmask and vpx_blend_a64_vmask to speed up
computing the supertx predictor.

Decoder speedup of up to 4% has been observed.

Change-Id: I255a5ba4cc24f78dc905d25b6e2f7fbafac13253

- Made source buffers pointers to const.
- Renamed vpx_blend_mask6b to vpx_blend_a64_mask. This is more
  indicative that the function does alpha blending. The 6, or 6b
  suffix was misleading, as the max mask value (64) does not fit into
  6 bits.
- Added VPX_BLEND_* macros to use when needing to blend scalars.
- Use VPX_BLEND_A256 in combine_interintra to be more explicit about
  the operation being done.
- Added versions of vpx_blend_a64_* which take 1D horizontal/vertical
  masks directly and apply them to all rows/columns
  (vpx_blend_a64_hmask and vpx_blend_a64_vmask). The SSE4.1 optimzied
  horizontal version now falls back on the 2D version. This can be
  improved upon if it show up high enough in a profile.
- All vpx_blend_a64_* functions now support block sizes down to 1x1
  (ie: a single pixel). This is for usage convenience. The SSE4.1
  optimized versions fall back on the C implementation if
  w <= 2 or h <= 2. This can again be improved if it becomes hot code.

Change-Id: I13ab3835146ffafe3e1d74d8e9cf64a5abe4144d

Change-Id: I263088be8d71018deb9cc6a9d2c66307770b824d

Directly call c functions, otherwise when EXT_TX is enabled, hybrid
transform other than combination of DCT/ADST has not been implemented, thus
will cause assertion failures in the switch loops in vp10_fhtnxn_msa() and
vp10_ihtnxn_nxn_add_msa().

BUG=webm:1239

Change-Id: I2379a07e5406f9489edcd2f3205682f679c9b091

Change-Id: Ie9188471e7dc07ab9c95b22f258b1662e895c533

vp10_optimize_b now takes between 40% to 60% of the TOTAL runtime
of the encoder, depending on bit-rate. It also contains 2/3 to 3/4
of the mispredicted branch instructions in the whole program.

Adding a few branch hints makes vp10_optimize_b around 2-5% faster
(dependig on bit-rate) when compiled with gcc/clang.

Change-Id: I1572733e18b4166bc10591b958c5018a9561fa2b

The combination of the two experiments improves the compression
performance gains:

lowres 2.5%
midres 2.1%

Change-Id: Id26c0a9474ce08893aa1d946365c7ff850fab57a

When the prediction residuals are all zero, reset the coeff rate
cost and the distortion value to be zero. This change doesn't affect
lowres set significantly, but improves several clips in the midres
set, like sintel_480p and mobisode2_480p, by a few percents. The
average performance for midres set is improved by 0.2%.

Change-Id: Idd5ebf2652e556a1b1c569fe3c48dacef3f11c32

Change-Id: Ibb63c492eb8278d115262b8fc3cbc761c406b107

Change-Id: Iceeca8ecbc43919b43189352a307479d666d1dad

Change-Id: I8dbc1002f5d6bf8f2409db8c6be4346f1df0590c

Use int64_t type for distortion. This avoids integer overflow
issues in the trellis optimization function in high bit-depth
settings.

Change-Id: I550c3ca9f11a3191ef8638a152887018cd476141