This commit enables the hybrid 1-D/2-D transform coding scheme for
high bit-depth setting. It improves the compression performance of
ext-tx experiment by 0.98% for lowres_all set.

Change-Id: Ic27f5037f2c36b095a93b9f15dbae34bdcdf00aa

This commit enables the 1-D transform to use Manhattan grid vertical
and horizontal scan order for transform coefficient entropy coding.

Enabled in inter prediction mode, the hybrid 1D/2D transform coding
scheme outperforms the 2D-DCT based coding system used in VP9 by
lowres_all  1.7%
hdres_all   1.4%

As one coding option, in addition to the existing 17 other transform
types in ext-tx experiment, the 1D/2D hybrid transform improves
the coding gains:
lowres_all  2.2% -> 3.0%

Change-Id: I9cefa9d9e38224546d0afd67feecd9f8d4a16ab0

This commit enables a hybrid 1-D/2-D transform coding scheme and
the accompany entropy coding system. It currently uses hybrid
1-D/2-D DCT transform coding. It provides coding performance gains:

lowres_all  0.55%
hdres_all   0.43%

Change-Id: I2b30dcafd21eb2bb3371f6e854cbab440a4dfa78

This commit fixes an encoding issue related to var-tx and ref-mv
experiments that causes the codec to use random values for transform
block skip flag.

Change-Id: I8daa6d6b88ea45b5bbeb81b43dd0eeff545c8e5a

Adds masked variance and sad functions needed for wedge
prediction modes to come.

Change-Id: I25b231bbc345e6a494316abb0a7d5cd5586a3a54

Move functions to be included in extern "C".

Change-Id: If57fa5eb7955763cf99e6839dde4d7221fad75ea

Change-Id: I1e65d7e1586d8c7c65bb150b1a928cf3adf97366

The above-right and left-bottom pixels were sometimes not used even
though they are available. Results on lowres_all and hdres_all are
mostly neutral.

Change-Id: Ic13533dd498442ad5592b83bb5fabf053cc8e8f0

The sum of squared value of a block can overflow 32bit, this commit
changes to use int64_t to avoid the overflow issue.

Change-Id: I78fcd6999634f186f86d649cfce85d97a993d040

Change-Id: I0743e00dad9d36a87870c480922f5ae904bd5c9d

Up-sampled the reference frames to 8 times in each dimension using
the 8-tap interpolation filter. In sub-pixel motion search, use the
up-sampled reference frames to find the best matching blocks. This
largely improved the motion search precision, and thus, improved
the compression quality. There was no change in decoder side.

Borg test and speed test results:
1. On derflr set,
Overall PSNR gain: 1.306%, and SSIM gain: 1.512%.
Average speed loss on derf set was 6.0%.
2. On stdhd set,
Overall PSNR gain: 0.754%, and SSIM gain: 0.814%.
On hevchd set,
Overall PSNR gain: 0.465%, and SSIM gain: 0.527%.
Speed loss on HD clips was 3.5%.

Change-Id: I300ebaafff57e88914f3dedc8784cb21d316b04f

Fixes some issues introduced by a merge of two patches.
Also decouples the temporal interpolation filter from the switchable
filters for now for ease of experimentation with both separately.

Change-Id: If1c7c08adf00e0cf818fe8d0d3656c26ea65eb32

Includes various cosmetic changes and refactoring including
naming the sharp filters differently (since they are no longer
8-tap).

Change-Id: Ida5a19ca0daa9f6a64a6734394c685b2a4a2564a

It improves the coding performance by 0.3%.

Change-Id: I9703abd705ceacdf9e7424428e5120253cadcc18

This commit unifies the encoder and decoder border extension and
motion compensated prediction process. Remove the decoder specific
flow to simplify the development flow.

Change-Id: I9c43bbe6d7c017e6da2db6a62c5bf3d0af7ccfce

Change-Id: Id7240260cec471a3f8d0986b9c8df06efda925f9

The interintra experiment, which combines an inter prediction and an
inter prediction have been ported from the nextgen branch. The
experiment is merged into ext_inter, so there is no separate configure
option to enable it.

Change-Id: I0cc20cefd29e9b77ab7bbbb709abc11512320325

This commit uses 12-tap sharp filter to generate alter reference
frame. It improves the compression performance by
derf    0.45%
hevcmr  0.35%
stdhd   0.79%

No encoding time change is observed.

Change-Id: Ia5dc26d5aae6b9b0cb782e5a28dc5066eeeb2ec8

Test screen content coding tools (currently only palette) at
speed 1 and two-pass.

Change-Id: I3c467aee1cd9c366c65a3abfdccfafa0416b59b7

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

Adds hooks to use 32x32 ext-tx. Also adds scan orders for the masked
transforms for 32x32.
Make macro USE_MSKTX_FOR_32X32 1 in blockd.h to support 32x32 masked
transforms for ext-tx.

Change-Id: Ie6564830266651fcafae2d536c274dafd664ce17

This macro works for the shift parameter being 0.
The ROUND_POWER_OF_TWO macro does not.

Change-Id: I8434d2933892e09bbc0d2dafc934d0c3637df347

"taking the absolute value of unsigned type 'unsigned int' has no effect"

Change-Id: Iea1f67c2a3171a98ca89d5dc7192a5508d086c16