Include upstream changes (variance fixes) into the merged code base.

Change-Id: I4182654c1411c1b15cd23235d3822702613abce1

Include upstream changes (unit test fixes, in particular) into the
merged code base.

Change-Id: I096f8a9d09e2532fbec0c95d7a995ab22fa54b29

Creates a merge between the master and experimental branches. Fixes a
number of conflicts in the build system to allow *either* VP8 or VP9
to be built. Specifically either:

  $ configure --disable-vp9 $ configure --disable-vp8
  --disable-unit-tests

VP9 still exports its symbols and files as VP8, so that will be
resolved in the next commit.

Unit tests are broken in VP9, but this isn't a new issue. They are
fixed upstream on origin/experimental as of this writing, but rebasing
this merge proved difficult, so will tackle that in a second merge
commit.

Change-Id: I2b7d852c18efd58d1ebc621b8041fe0260442c21

Change-Id: Ib39ad47a7d188f3b45416937b7eeb28c3e79b74c

In the variance calculations the difference is summed and later squared.
When the sum exceeds sqrt(2^31) the value is treated as a negative when
it is shifted which gives incorrect results.

To fix this we force the multiplication to be unsigned.

The alternative fix is to shift sum down by 4 before multiplying.
However that will reduce precision.

For 16x16 blocks the maximum sum is 65280 and sqrt(2^31) is 46340 (and
change).

This change is based on:
16982342 Missed some variance casts
fea3556e Fix variance overflow

Change-Id: I2c61856cca9db54b9b81de83b4505ea81a050a0f

so they are consistent with actual definitions of the functions

Change-Id: Ie4b4e81b3da3e288fc2edbbd2b393a5c54d2556b

Change-Id: Iedaa108ddb65f54d768424f9c47ad4d069b656fd

s/([vV][pP])8/$19/
additionally dct.h was removed; declare the _c functions that are used
in the tests. the TODO for conversion to parameterized tests still
remains.

Change-Id: I73db9425a57075bbb78a92693ba6b320578981cd

Change-Id: I0ff77f51595599cc3de5183c6c655fd261e3d925

Change-Id: Ic3e3559384a0e72abdc9b66a19865474c2a41b38

Change-Id: I69fd876dd51eb2b4a4a449faa5922225e9508b42

Change-Id: I44b3ad780cef6f448fa17ff8e28fea87ef9cd518

Converted vp9_short_fdct16x16_c and vp9_short_idct16x16_c to
integer versions.

Change-Id: Ie3ec985a890ac0f4f4f5818e6f0122e00c8af69f

Change-Id: Ibfac7e000509d2017eac9a108060e534a19fec33

there are still a couple type of warning left, which are related to
double constants assigned to float type. As those would be addressed
by the conversion of transforms into integer version. This commit
has left those un-dealt with.

Change-Id: I48fd9b489c0c27ad6b543f4177423419f929f2bb

Documentation is typically auto-detected by checking for php and
doxygen. Add an option to explicitly disable it.

Remove toggle keywords from libraries, examples, documentation and
unit tests. They were not consistent with the default status.

Change-Id: I21049675ccfd8e58ac612cd058641b197db5c0eb

calculate the txfm_cache difference first as both values may be
INT64_MAX with the intent that they cancel each other out.

Change-Id: I214d072458e1b24f60289974e6302af1aff7b66c

Removed invoke search from encoder

Change-Id: I3d809b795abe6df0e71366edfe94026aaede14fb

rd_pick_intra4x4mby_modes / rd_pick_intra8x8mby_modes would both use the
input value of 'rate_y' in the return calculation. In many places this
value is uninitialized. Remove the unneeded sum.

Change-Id: Icbd3df685303000301e69291c0ebc06f74bd548d

Change-Id: I25c067326153455abe1a79f8f44f70b87350e655

Change-Id: I8ea836ce92c1c96f1e2bdf45e704d36ec9dbc401

yv12extend_generic.h target not found.

Change-Id: I8b5c9280c92573e5c1917ba4e18a99a6ce7dcb65

use unsigned ints to extended filter values in
vp9_mbloop_filter_horizontal_edge_c_sse2

Change-Id: I55ec3ac2bcb9baf55626b0384d151b07fc8e087d

The block sizes for decoding tokens are up to 16x16, which means
eobs is within [0, 256]. Using (signed) char is not enough. Changed
eobs data type to unsigned short to fix the problem.

Change-Id: I88a7d3098e1f1604c336d6adb88ffec971fb03a6

Change-Id: Ia601e96fcb4fc547884b6ab894f9f2ad22a98078

Change-Id: I7cd21b9f1e69f4e0b3338bfe27b3c67e4b47de58

Import changes made on the experimental branch in preparation for
merging the two branches.

Change-Id: I7b5b8fb4fca155cb1d72e7ba13eef18e6a94a298

Update vpx_scale from current code in master, run style transform, fix
lint warnings.

Change-Id: I47eadeb5b6881d448ea3728537f9b8a5b5aac78e

TEST=Ran it on different asm files.

Change-Id: Ief2a009366787954d0eb5c356c64acaef350cf84

Change-Id: Ic084c475844b24092a433ab88138cf58af3abbe4

Most of these were picked up by jenkins in the commit that changed
the vp8 namespace to vp9 in common/.

Change-Id: I5cbd56ffc753b92ef805133cda6acc1713a13878