Brings the following commits to vp10:
269428e3 Tie the bit cost scale to a define.
d13385ce Switch to 9-bit rate cost constants built on a 256 probability denominator.
ad43a738 Fix a signed overflow in vp9 motion cost.
1c9b0918 Fix some interger overflow errors
fac947df Restore previous motion search bit-error scale.

Change-Id: I598ba7ee7efcde18439c31dfa96b86cbf297a580

This commit adds the computation of fastSSIM for highbitdepth build,
it also modifies the hbdmetric test to be more generic and applicable
for fastSSIM.

The 255 used for calculating ssim constants c1 and c2 is not exactly
scaled by 4x and 16x to 1023 and 4095, therefore requries the metric
test to have a thresold more tolerant than 0, currently at 0.03dB.

Change-Id: I631829da7773de400e77fc36004156e5e126c7e0

obmc: We add an obmc prediction mode at superblock level.
When it is enabled, predictors of the above and left blocks
are used to refine the regular block-based motion compensation.

Change-Id: I6310104ea3dfece16d736351e368861471dd1c9b

Change-Id: I6c78188bdedb52655678c63f6a767567b256a880

Change-Id: I61dc0f43d073b62d0eab8cd7471c2d76e03379bf

This commit aligns the rate-distortion metric for the recursive
transform block partitioning and the super transform. It resolves
the conflicts between these two experiments. The coding performance
gains of the combined experiments (var-tx + super-tx) has been
improved:

derf   0.89%  ->  1.9%
hevcmr 1.06%  ->  1.8%
stdhd  0.29%  ->  1.4%
hevchr 0.80%  ->  2.3%

Change-Id: I7e33994ad70c1b2751435620815f867d82172f41

Change-Id: Ia9ccba156a8a3ada6928be53eb6258fb68b6c9f1

Change-Id: Ia5a68f26c67d13d3f2dd3b3f8afabb781e2c8f73

Change-Id: I7a810323fc33fb6d373c3f5bb4d5d0d33170948c

Change-Id: Ieeb458353af6c903445518eef60328c62ca5c741

This patch makes rd optimization use the same context for computing
the rate cost of coding the partitioning as the packer actually uses
when emitting it in write_modes_sb.

Change-Id: Idb1427bb2f9c37ab80c6aa182f7ff754ef0595cb

Change-Id: I8a3d59378abb1dfa4e614b2975c2db05d4224bd5

The value of use_highbitdepth flag is used for compute the size for
high bit depth buffer allocation, which should take value 0 or 1
depending on if the buffer is used for high bit depth or not.
Previously, the values is set to 8 or 0, this commit fixes the issue
and properly set the value for this flag to 1 or 0.

This cuts the size of highbitdepth buffer memory allocation to 2/9 of
the size prior to the fix.

Change-Id: I401518b5a6147e5d8a973e54f7ca6bc1892065e0

This commit enables entropy coding for dynamic reference motion
vector modes. The probability model is contexted on the ranking
categories of the reference motion vector candidates.

Change-Id: I09b58d98a409d63ec1a407331e29f8945b7ef17d

Fixes an issue where the tx_type was not set correctly for
sub8x8 inter and intra blocks. In the current syntax, for
sub8x8 blocks, there is still a single tx_type that is
transmitted. Ideally, this should be searched for the best
rd performance, albeit at the expense of encode speed.
For now, we just set it to DCT_DCT. Previously it was left
incorrectly as what was used for the previous non sub8x8
block.

derflr: BDRATE -0.277%

Change-Id: If76ba903bfbfd4d374cf1ac7d1daee50e92f0edd

This commit does not change the computation, nor results.

Change-Id: I1a7bb47050220d970f075458b507c5e55d93b22e

This commit enables the dynamic reference motion vector coding mode
for the compound inter blocks.

Change-Id: Ibe78fd8de6989db392cd67a9d81a69d680345ba1

Change-Id: I61ea7f63acbcfeecd3f7dba5a5a38b980efc802b

Now set at 100.0 instead of infinite

Change-Id: I41bae0c4bd95a26f9819584e7311b7945df1271a

There were a number of compiler warnings:
1. int16_t to uint8_t in recon_intra.c;
2. double to float conversions in psnrhvs.c
3. intptr_t to int in quantize.c
4. size_t to int32_t in decoder.c

Change-Id: Id95423b17779dcfa6cf39d9a90fe8cb8b910f5df