This is an initial attempt to allow variable block size partition
in non-RD coding flow. It tests 8x8, 16x16 and 32x32 block size per
64x64 block, all using non-RD mode decision and the associated rate
distortion costs from modeling, then selects the best block size to
encode the entire 64x64 block. Such operations are triggered every
other 3 frames. The blocks of intermediate frames will reuse the
collocated block's partition type.

It improves the compression performance by 13.2%. Note that the gains
are not evenly distributed. For many hard clips, the compression
performance is improved by 20% to 28%. Local speed test shows that
it will also increase runtime by 50%, as compared to speed -7. It is
now enabled in speed -6 setting.

Change-Id: Ib4fb8659d21621c9075b3c369ddaa9ecb0a4b204

Change-Id: I512482853bdf2695fbdf1c705a2ada354ccf76cf

Change-Id: I3b944884c048f589c86e0169aeb3c3855bc8b729

vp8_set_maps was renamed in
61ecd7f1 Add VP9 support to the set maps example.

Change-Id: I6c67254b9c437886e88dca21387ae4e86c74c440

* changes:
  configure: test for -mssse3
  configure: factorize gcc machine option checks

This reverts commit 89025585.

This check breaks BSD builds and isn't useful through the configure
process. The README describes the build environment requirements (GNU
make).

Change-Id: I25f8a9c1640909412ab405dbd09a1c4d93e5a511

fixes compile with older versions of gcc

Change-Id: If529f3102dbc926be8d5fb91d4161fa686c11840

check_gcc_machine_option() replaces individual -m* checks

Change-Id: I0f4a82020c0541b99209321907e80e071d1245e1

Change-Id: Iedb136e4019ec3eb3005ea567efb33902dccfb8d

The use of uninitialized skip flag will trigger inconsistency in
coding statistics, when alternate RD and non-RD coding modes are
enabled. This commit fixes this issue and removes unnecessary if
statements from update_state_rt.

Change-Id: I7d549dcb0e3ef48b999e5bbc78174ba84502cfcf

Change-Id: I5136c45d3f5f435005a88d04652addcd835f4bfe

Change-Id: I03049f89565ce19a297e65e2d53db127dc6f77d9

Activated using aq_mode=3.

Change-Id: Ied628b9e7bd0e88b0c75790276bca75b19eb5c07

Change-Id: Ia561dda53f2dd10e3a10a2df2adb8027ab19397a

Change-Id: Ibfccee5e35c235c02843e1c1fbd3c39034619cf5

Hash and license details are found in README.webm

Change-Id: I52192abe8eba8ec413f6bccd479e8e2256a8f617

Change-Id: Ib9e27298c575afc02a98b593bc6ad60762064d9b

Change-Id: Iaaea882e59dfec38c0a9a24deaf8525a0fb62515