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

This is to match the scale to the fdct8x8 used in original daala
psnrhvs computation.

Change-Id: Ic30b50747ba9c340bcb679f7439640046c69f90a

Set USE_12_SHARP_FILTER to 1 to turn on the experiment
The psnr percentages increase
       derf   stdhd
lowbd  +0.332 +0.318
highbd +0.476 +0.507

Change-Id: I783c0fc764ee8541645e100453c9b2073924e209