fdct16_sse2() was not bit-exact with C reference, fdct16().
The inconsistency was found by writing a unit test for
vp10_fht16x16_sse2().  Since the unit test needs a pending
change on the inherited base class.  I will commit this unit
test after making a header file for this base class.
Passed the uncommitted unit test: vp10_fht16x16_test.cc.

Change-Id: If2b617883c633a3ea90c19e1d018240c8007102b

Implemented fdst8_sse2() function against C version: fdst8().
Added seven DST related hybrid transform types in vp10_fht8x8_sse2().
Replaced vp10_fht8x8_c() with vp10_fht8x8_sse2() in fwd_txfm_8x8().
Speedup: 18.1%, 11.5%, 22.0% based on speed test from
city_cif.y4m, garden_sif.y4m, mobile_cif.y4m.

Change-Id: Ia4aa1ea44c7a33e494f64ce843037f8703f975e3

Change-Id: I12ce1da18b3db7bd2f36e0424a264b3c36fbed61

This commit adds the ability to shift down the working buffer when
source bit_depth is different than working bit_depth. It does so
by shift down to be consistent with source bit_depth.

Change-Id: Idfdbfc614d73fe445d62e35e642cc7d75e9dc4ff

From "ssim.h"

Change-Id: Ie53378794149ef8a844b4eb47ad4f08579de4b60

This commit unifies the motion vector cost buffers for full pixel
and sub-pixel motion search. The new motion vector coding system
provides 0.5% coding gains for 720p and above sequences and 0.2%
for lower resolution sets.

Change-Id: I927ec81eadc39d11a3c12b375221a1ddd2e8bf24

This commit extends the HBDMetricTests to handle testing for metric
computation where input source depth is different from working bit
depth.

Change-Id: I5d11101cc9603a3fd09e8439816bb982a0f1b654

Priviously, we do 12-tap interpolation even there is no sub pixel,
This could cause a bug becuase decoder doesn't extend border when there
is no sub pixel. In this situation, if we still do interpolation, we
will access the border extension which doesn't exist and cause a
memory error

Change-Id: I55b879722f0a10c5d13261bd9617a75c826a2418

This commit accounts for the context based probability model for
motion vector cost estimate in rate-distortion optimization.

Change-Id: Ia068a9395dcb4ecc348f128b17b8d24734660b83

This commit converts the scalar motion vector probability model
into vector format for later precise estimate.

Change-Id: I7008d047ecc1b9577aa8442b4db2df312be869dc

Change-Id: I51307a217eeba14dbdaa2522be474530316a4faa

Applied DST sse2 to 4x4 transform.

Fixed DST coefficient packing to satisfy 4x4 transpose requirement.

Change-Id: I9164714c77049523dbbc9e145ebb10d7911fba9d

This fixes a bug in HBD sum of squared error computation introduced
in  #abd00505.

Change-Id: I9d4e8627eb8ea491bac44794c40c7f1e6ba135dc

-Avoid unnecessary calculations
-Use SIMD when possible

Encoder is about 5% faster with the extra intra prediction angles
enabled.

Change-Id: I131056befe327cedab217ad4a40d5f2a11318acc

Preliminary tests indicated that these changes make cost_coeffs
approximately 20% faster which is a 2% improvement overall

Change-Id: Iaf013ba75884415cd824e98349f654ffb1c3ef33

Change-Id: I07324155f73bbdbe25bb7a7ccd587ebf9010ac7a

This makes all metric computation to locate at some place, also gets
rid of duplicate code between vp9 and vp10.

Change-Id: I24a2707d183a2419cd18a8343010adae185ffcd4

Adds new 32x32 masked 1-d transforms that combine 1-D length-16
DCT with length-16 identity transforms.

To be continued in subsequent patches.

Change-Id: I0b4f66492d44c079b3c3b531ba48a97201de1484

This commit fixes an enc/dec mismatch in the dynamic motion vector
referencing experiment introduced in 837ef00.

Change-Id: I9fbe116fce118a80ef0f96bf41ce1f802547c2ee

This bug made the rd loop use one-side obmc (compound of the current
predictor and the predictors of the left mi's, while the above ones
are ignored by mistake) to determine whether to use obmc. This fix
improved the compression performance by ~0.6% on different test sets.

Coding gain (%) of obmc experiment on derflr/derfhd/hevcmr/hevchd:
1.568/TBD/1.628/TBD

Change-Id: I43b239bedf9a8eebfd02315b1b036e140a998140

Add frame-level condition for reference masking: under external or
internal dynamic resize, allow for reference masking if none of
the references have been scaled.
Peviously, reference masking was turned off for the stream if dynamic
resize feature was enabled or an external resize event occurred.

reference_masking gives speed up with little/no loss in compression.
For speed 7 on rtc set: encoding time decreases by about 5-7%,
avgPSNR/SSIM goes down ~0.2%.

Change-Id: Ie4444577451ef954414d8fb4b2c99d65cadf1746