Coding and costing of mv reference signal.

Issues in updating MV ref with COMPANDED_MVREF_THRESH
to be resolved. Ideally the MV precision should be defined based
on absolute MV magnitude not as now the MV ref magnitude.

Update to mv counts moved into bitstream.c because otherwise
if the motion reference is changed at the last minute the encoder
and decoder get out of step in terms of the counts used to update
entropy probs.

Code working on a few test clips but no results yet re benefit vs
signaling cost and no tuning of red loop to test lower cost alternatives
based on the available reference values.

Patch 3. Added check to make sure we don't pick a reference
that would give rise to an uncodeable / out of range residual.

Patch 6-7: Attempt to rebase. OK to submit but best to leave flag off for now.

Patch 9. Remove print no longer needed.

Change-Id: I1938c2ffe41afe6d3cf6ccc0cb2c5d404809a712

Should fix B_PRED-related encoder/decoder mismatches.

Change-Id: I16f808dffd19094e02e8562ba58cc1016155ce93

This fixes edge extension if SB [0,1] doesn't use B_PRED but [1,1] does.

Change-Id: I48354a9dba0de16472938824f5e6db87ce61979f

1.6% boost in decoder performance for the clip used.

Change-Id: I91f3c4573fd3d10afbf18930f279af7ae2223e3a

3.7% boost in decoder performance for the clip used.

Change-Id: I74f28486a9352b472b36e21b5eaf30eff35e9199

Change-Id: I87d571008c73f0a8514e0a864405aadb82fd1bc0

Change-Id: I6a28cc87af275fc267b3cc8d90d642dcc870c249

Change-Id: Ie33f7d0f90d0e5862be975d676a700d06f79eec6

Change-Id: Ibb51f3f8c3575d4621890220b20887a13a46a04e

Change-Id: I2823043634b0fa617c2715d63ff18595b7209287

Stray CONFIG_HYBRIDTRANSFORM caused decode mismatch.

Change-Id: I1d77bad9b366f7a6ceb3cb45269ed5badb5c4c53

Refactor per-transform copy & paste into a common function
update_coef_probs_common() and read_coef_probs_common(). The dry-run and
bit-writing loops in the encoder are still obvious candidates to be made
common, but they start to diverge a bit in the next commit, so are left
as-is for now.

Change-Id: I896bd3f4a073a6296eab7e92463fef79d8c6c08c

On Ubuntu 12.04, we got the following warning message:
<command-line>:0:0: warning: "_FORTIFY_SOURCE" redefined
 [enabled by default]
<built-in>:0:0: note: this is the location of the previous definition

This was already fixed in VP8 configure file. Did the same change in
experimental branch to stop this warning.

Change-Id: Id162e5fd8841585ae806df6560b2f7536ea307c0

Change-Id: Ia904f4ec72500d29f1361ce305d8f3231e592f47

This reverts commit b0e3ca12.

Change-Id: I9c5aa463461b187160ad01fbc1795ae4f5263b2c

to enable build under windows/MSVC

Change-Id: Ida41cc5b3c8d0fec9512c2f5c5feb64e07b44805

Change-Id: I240d6b50069fd3f35cc4fed2f4507796f0ef25e9

There is a macro DEFAULT_INTERP_FILTER defined in encoder/onyx_if.c that
is set as EIGHTTAP for now - so SWITCHABLE is not really used. Ideally,
this should be SWITCHABLE but that would make the encoder quite a bit slower.
We will change the default filter to SWITCHABLE once we find a faster way to
search for switchable filters.

Change-Id: Iee91832cdc07e6e14108d9b543130fdd12fc9874

Change-Id: I0d306b0062be59bc785b65882691c956c8b5e7c8

Removes the old mv encoding code.

Change-Id: I1026d48cc5ac15ccb776f98463e929254c3dc7da

Change-Id: Ibc4425bb6e01606751021e57c93106c365a2da21

The previous double if and else code snippets were rather confusing.

Change-Id: Id1b6152fa0e471beb9b20407aa406e109c1471e3

Change-Id: I5bca7b7a4b230082d36ac6fb84db84137ad177d7

* changes:
  Fix another typo in 4x4-transform-for-i8x8-intra-pred coeff contexts.
  8x8 transform support in splitmv.
  Use SPLITMV_PARTITIONING instead of a plain integer type.

Change-Id: I99f1982b30a630a9a070a8326d83b34a33cba14c

Change-Id: I02e7f64a7c99f6c222b9ef21341b0e801d646810

For splitmv, where partitioning is 8x16, 16x8 or 8x8, this patch
uses the 8x8 transform (instead of the 4x4) if txfm_mode is
ALLOW_8X8 or ALLOW_16X16. For TX_MODE_SELECT, splitmv can indicate
which of the 2 transform sizes (4x4 or 8x8) it wants to use.

Gains (with hybridtx4x4/8x8/16x16 and tx_select experiments
enabled) on derf: +0.9%, HD: +0.4%, STD/HD: +0.8% (SSIM or overall
PSNR, both metrics show similar improvements).

Change-Id: Ide954b000b415548ed92a7ac78e24f36e60fcf06