Previous change c4048dbd limits the mv search range assuming max block
size of 64x64, this commit change the search range using actual block
size instead.

Change-Id: Ibe07ab02b62bf64bd9f8675d2b997af20a2c7e11

Put rectangular partition check flag change according to the rd
costs of NONE and SPLIT partition types under the speed feature.

Change-Id: If681e1e078a8d43d86961ea4b748da5cd1b6c331

Removing unused get_sbuv_perpixel_variance function, using has_second_ref/
is_inter_block functions, organizing includes.

Change-Id: I016de4af12fbbb8b4ece26a70759b2392651b095

gets rid of a mix of styles

Change-Id: I3591d312157bc6f53a25438bf047765c671fd8a8

This commit changes the partition search order of superblocks from
{SPLIT, NONE, HORZ, VERT} to {NONE, SPLIT, HORZ, VERT} for
consistency with that of sub8x8 partition search. It enable the use
of early termination in partition search for all block sizes.

For ped_area_1080p 50 frames coded at 4000 kbps, it makes the runtime
goes down from 844305ms -> 818003ms (3% speed-up) at speed 0.

This will further move towards making the in-search partition types
configurable, hence unifying various speed-up approaches.

Some speed 1 and 2 features are turned off during the refactoring
process, including:
disable_split_var_thresh
using_small_partition_info

Stricter constraints are applied to use_square_partition_only for
right/bottom boundary blocks. Will bring back/refine these features
subsequently. At this point, it makes derf set at speed 1 about
0.45% higher in compression performance, and 9% down in run-time.

Change-Id: I3db9f9d1d1a0d6cbe2e50e49bd9eda1cf705f37c

Adds a couple of minor fixes, which may be absorbed in Jingning's
patch. Thanks to Guillaume for pointing these out.
Also adjusts the thresholds for speed 1 and 2 to 16 and 32
respectively, to keep quality drops small.

Results:
--------
derfraw300:  threshold = 16, psnr -0.082%, speedup 2-3%
             threshold = 32, psnr -0.218%, speedup 5-6%
stdhdraw250: threshold = 16, psnr -0.031%, speedup 2-3%
             threshold = 32, psnr -0.273%, speedup 5-6%

Change-Id: I4b11ae8296cca6c2a9f644be7e40de7c423b8330

It appears that the above/left mb_skip_coeff used during
the pick modes, is left over from the previously
encode frame.  This patch initializes the flag to the default
value of zero.


Change-Id: Ida4684cc99611d6e3e82628db35ed717e28ce550

Using size_group_lookup table and better variable names.

Change-Id: I6e67f2ce091845db43ace7d21b7ae31c6f165aec

Change-Id: I32e43474e8651ef2eb181d24860a8f118cfea7bf

Changes to code to auto select a partition size range
based on data from spatial neighbors.

Now looks at the sb_type in each 8x8 block of above
and left SB64.

The effect on speed 1 is now weaker giving better
quality but less speed gain. Now also used in speed 2.

Change-Id: Iace33a97d5c3498dd2a9a8a4067351941abcbabc

As the pixel values beyond image border are duplicates of pixels
on edge, the change limits the mv search range, any mv beyond
the limits no longer produce new/different prediction values
as entire block with pixels used for subpel interpolation are
outside image border.

Change-Id: I4c6fdf06e33c1cef1489f5470ce0fb4e5e01fb79

Redundant dst, pre[2] from build_inter_predictors_args, unused cm from
encode_b_args.

Change-Id: I2c476cd328c5c0cca4c78ba451ca6ba2a2c37e2d

VP9_COMMON is the right place to segmentatation struct because it has
global segmentation parameters, not something specific to macroblock
processing.

Change-Id: Ib9ada0c06c253996eb3b5f6cccf6a323fbbba708

Adds a speed feature to disable split partition search based on a
given threshold on the source variance. A tighter threshold derived
from the threshold provided is used to also disable horizontal and
vertical partitions.

Results on derfraw300:
threshold = 16, psnr = -0.057%, speedup ~1% (football)
threshold = 32, psnr = -0.150%, speedup ~4-5% (football)
threshold = 64, psnr = -0.570%, speedup ~10-12% (football)

Results on stdhdraw250:
threshold = 32, psnr = -0.18%, speedup is somewhat more than derf
because of a larger number of smoother blocks at higher resolution.

Based on these results, a threshold of 32 is chosen for speed 1,
and a threshold of 64 is chosen for speeds 2 and above.

Change-Id: If08912fb6c67fd4242d12a0d094783a99f52f6c6

The macro block mode info context originally contained an
entry for each 16x16 macroblock. In VP9 each entry refers
to an 8x8 region not a macro block, so the naming is misleading.

This first stage clean up changes the names of 3 entries in the
structure to remove the mb_ prefix.

TODO clean up the nomenclature more widely in respect of
mbmi and bmi.

Change-Id: Ia7305c6d0cb805dfe8cdc98dad21338f502e49c6

Don't do vertical or horizontal splits if subsize < min_partition_size,
except for edge blocks where it makes sense.

Change-Id: I479aa66ba1838d227b5de8312d46be184a8d6401

Adding set_skip_context() function used from both encoder and decoder.

Change-Id: Ia22cfad3211a00a63eb294f64f857b78f4aa9b85

There will be another change set to rename BLOCK_SIZE_TYPE enum to
BLOCK_SIZE.

Change-Id: I8d1dfc873d6186fa5e554262f5169e929978085e

It represents the minimum partition size, so don't split if
bsize == min_partition_size .

Change-Id: Id77c32d6afef7d2ddec0368eaae18fb13227d30e

Loop filter configuration doesn't belong to macroblock, so moving it from
MACROBLOCKD to VP9_COMMON. Also moving the declaration of loopfilter struct
from vp9_blockd.h to vp9_loopfilter.h.

Change-Id: I4b3e34be9623b47cda35f9b1f9951f8c5b1d5d28

The set_offsets call is necessary inorder to set the
mode_info_context ptr correctly.

Change-Id: I644910cc5bacc50ee9cd78458843274ad8ee636d

Moving this block of code into a function makes the
code easier to read and change.

Change-Id: If4ede570cce1eab1982b188c4d3e4fd3d4db236e

Different partitionings were not being evaluated against
best_rd and there were unnecessary calls to RDCOST. This
could have resulted in a non-optimal partioning being
selected.

I simplified the variables used to track the rate,
distortion and RD values throughout the function.

Change-Id: Ifa7085ee80d824e86791432a5bc6d8fea5a3e313

The low precision 32x32 fdct has all the intermediate steps within
16-bit depth, hence allowing faster SSE2 implementation, at the
expense of larger round-trip error. It was used in the rate-distortion
optimization search loop only.

Using the low precision version, in replace of the high precision one,
affects the compression performance by about 0.7% (derf, stdhd) at
speed 0. For speed 1, it makes derf set down by only 0.017%.

Change-Id: I4e7d18fac5bea5317b91c8e7dabae143bc6b5c8b

There was no benefit having this function. For example, inside
read_switchable_filter_type switchable filter context was calculated twice.

Change-Id: I79cd5bf95cbc0f6d8bf91a2e32289e01b18dcff1

Change-Id: I3aae21e88b876d53ecc955260479980ffe04ad8d

Adds a speed feature to skip all intra modes other than
DC_PRED if the source variance is small. This feature is
made part of speed 1 and up.

Results on derf300: psnr -0.07%, speedup about 1-2%

Also uses the source variance to fine-tune the early
termination criteria when FLAG_EARLY_TERMINATE is on.
This feature is made part of speed 2 and up.

Results on derf300: psnr -0.52%, speedup about 5-7%

Change-Id: I59e38aa836557cfa5405ae706fc64815cbfe4232

This changeset allows to remove vp9_switchable_interp and
vp9_switchable_interp_map arrays and make code much clear. Actually we
still have to use these mapping but only inside read_interp_filter_type and
write_interp_filter_type functions.

Change-Id: I4026c6f8c4acefba6c81421b7bacbaa52cc45f50

Cons bw/bh parms that should have been const. Additional formatting.

Change-Id: Icd36a5c9dc17dadd7284315ac0d6fef1a565ca16

Change-Id: I428c4d42212b757112e3acfe5b81314cfbb5fd6b

Consistent names with TX_SIZE, TX_MODE, and TX_MODE.

Change-Id: I79592218bf5a40ace89197a34a06ee7de581ed8d

Using it instead of long unclear verbose check
"mbmi->ref_frame[0] != INTRA_FRAME".

Change-Id: I9c7b4b3797942fa962bf3ba7460fff3084beabe9

Change-Id: I0e9329490828684a4fd46f540d89114cc68e8407

Change-Id: I73b59d7699a8e7e7acd3bf8041cb6c98ce9ba4bf

Change-Id: I27471768980fc631916069f24bc7c482a5c9ca17

Adds a function to compute source variance for various
sb_types to be used for pruning mode and partition searches.
[The existing activity measure function is currently specialized
for only 16x16 MBs and needs to be updated].

Change-Id: I22a41e6f1430184201487326fdbebb9b47e6fc24

If the partition is out of partition size range, we don't
need to process small partition information.

Change-Id: Ice9bfbbdebe1f2ef79271a3aee17de0ed4608376

use_min_partition_size and use_max_partition_size are not used
currently, and could be added back if needed later.

Change-Id: Ib22a9c06b064567a7c1d6d5445567ed77e0d3acc

Change-Id: Ib4e4b41094b54874ee34343dd77c0c131ceed9d2

This commit removes redundant arguments passing in the function of
rd_pick_reference_frame. This resolves the clang warnings about
potential use of uninitialized values.

Change-Id: Ic68f949a9f8fcd0a583786b0c75321104ea44739