Brings back most of Jim's previous patch for choosing
partitioning based on variance while making it compatible
with the current state of the code. Also adds a
nonrd_use_partition() function to recursively encode  for any
arbitrary sb_type decisions within a 64x64 block; and
includes some refactoring.

Currently, when the VAR_BASED_PARTITIONING mode is turned on
for speed 7, there is a 10+% speed-up observed.

Experiments/improvements with this new partitioning method
will be conducted subsequently.

Change-Id: Ie6f43bfbde30583e941f450bf07c3b48828c9571

Clean-ups include
a. redundant code in rt -5 speed feature settings
b. code that guarantees square block availability in
rd_auto_partition_range()

Change-Id: Ic7b04d45b6dc15c461e0edbbb4e78aec20348291

These were discovered by ActiveMapTest.

Change-Id: Ifcd305ae2d954b6ec7edcaed0f80baf18c769e01

Change-Id: I894977e6655630823145c60c8258551bd3c8c76b

Change-Id: I6e2fec2814fd366a1ce1321208d3b0e8aa0d98b0

Change-Id: Ied12b39c55667b26fd3bf90eb331e601c53a10f6

Change-Id: I47b3c38aadfd8f3ea08515a18a5948aa1375c650

Change-Id: Ib105db0f3deeedf6a8402a292db3df1d77a3d7c1

Changing aq_mode type from int to AQ_MODE enum.

Change-Id: Ib7b5f0b70d02ded58a31dfade9c05a347f73beca

Change-Id: I446fca8aa11a4d4fc2b23d4b32348b74d74d0202

This commit replaces SAD cost with modeled rate-distortion cost
for non-RD mode decision. It translates the prediction residual
SSE into estimate rate and reconstruction distorion costs, hence
capturing the quantization setting effect. The compression
performance of speed -7 for rtc set is improved by 14.79%.

Change-Id: Ifda014eb0501d13109fe7f92680bf1410b463632

Properly set intra mode information entries.

Change-Id: Ie3a8992e415dcdd9087a55993bbca06087a0107a

The frame level transform size selection is done inside
encode_frame_internal().

Change-Id: Id7e5e417a3a3f88f875bf12b21bb8029bc6d0d82

Set speed features before running frame encoding. This avoids
redundant RD threshold calculation in key frame coding.

Change-Id: If8e3cf2c02976baa59b310c1c23af9eea0c46e36

Change-Id: I916944950deb22f4c2301d83a803b732bf3ecd77

Change-Id: I6d47618e8aee6e6c2fe1cf0b8bb4da0b2a0bab66

In addition, a local variable was renamed to avoid confusion.

Change-Id: Id4c497f9cfa219e8a414aa9fee9a85af5f147249

Adds a speed 8 to VP9 where only the nearestmv (0 mv) is searched.
This seems to be about the same speed as vp8 speed 5.

Adds a new speed feature to disable inter modes based on a mask for
each blocksize.

Adds code for having lower complexity motion search methods
in nonrd pick mode function, even though speed 7 still uses DIAMOND
search for now.

Also uses HEX search for speed 6 rather than FAST_HEX which improves
psnr by 0.56% without any noticeable speed drop (tested on gipsmotion).

Change-Id: Ic13176572dbd3aed5884a26786940a4b1bbd8a75

For blocks at frame boundary, the selected block size sometimes needs
to be smaller than that was first given. This commit forces such block
size change only between square blocks, so as to avoid the potential
use case containing 32x16 + 16x8 + 16x8, for 1080p sequences.

Local test suggested no visible coding speed difference. Borg test
reveals no difference in terms of compression performance.

Change-Id: Ie8de87f3c6febc3acf11b4cbfdf2077f9f6def52

Change-Id: I9a38af32f16f196b83dd69755eafb9543edf5691

Improves coding efficiency by about 1%, increases speed by
about 15-20% over exsiting speed 7.

Change-Id: Ibf5b9b5a5c8548e863ce19047c42b579aac21d19

This commit removes a few arguments that are not used in the
non-RD mode decision.

Change-Id: I0d878bb5a7dba1b34fe0b64afe55bf11b1a9a2d7

Instead of using source variance, this patch uses variance of the
frame difference between the source and the current frame to make
fixed size partition decisions. Also disables adjusting partitioning
if variance based or fixed size partitioning is used.

The latter change improves the speed substantially for speed 6, so
that speed 7 is now less than 3x the speed of speed 6. But speed
6 is 48% better in psnr on the rtc set compared to speed 7.

As compared to speed 5,
speed 6 is -37% in psnr at about 2.5x the speed,
speed 7 is -55% in psnr at about 7x the speed.

Change-Id: If61d80431d3e04ed304ac05832e773cdb2c0a578

Change-Id: I89c37b739493c79044f8c70ae2424aa074eb56c8

Change-Id: Idd800fae21508699e9d973134817493763a65042

Adds a method for determining a fixed size partition based on
variance of a 64x64 SB. This method is added to rtc speed 6.
Also fixes a bug in rtc_use_partition() and includes some
refactoring related to partitioning search, and some cosmetics.

Currently compared to speed 5, the coding efficiency of speed 6
is -19% and that of speed 7 is -55%, in cbr mode.

Change-Id: I057e04125a8b765906bb7d4bf7a36d1e575de7c6

Change-Id: I7e96d6199f882d35357f6a9a08c04ad0af5dc26e

The optimizer did something funny with the code around
line 1412.  Before the call to encode_sb split_dist was
set properly but after it was adjusted and converted to
a negative.

https://code.google.com/p/webm/issues/detail?id=714

Change-Id: I9a7631d5325ade2dc28c1030653a23eecec8721b

If sf->disable_split_mask is DISABLE_ALL_SPLIT, disable
sf->adaptive_pred_interp_filter to avoid unnecessary operations.

Change-Id: Icb59174b2f4e9a3c3c16a696deb8018e5bd999eb

Moves the existing speed 6 to speed 7 and adds an
intermediate level 6 which is roughly in between
speeds 6 and 7 in both speed and coding efficiency.
Also includes some minor fixes/adjustments.

Change-Id: I98befc4d82d750e79fe426c457c4a2571f6b6cc7

This commit makes a refactoring of the rtc_use_partition. It allows
the encoder to take a preferred block size for non-RD mode decision.
The boundary blocks are handled such that smaller block sizes that
fit in the boundary size will be used instread.

In rtc mode, the coding performance of speed -6 for pedestrian_1080p
goes from
158980 b/f, 38.934 dB, 22721 ms to
159008 b/f, 40.064 dB, 23721 ms.

For rtc set, the speed -6 compression performance is improved by
26%. Still about 2dB behind speed -5 at this point.

Change-Id: If0944f0880eaf1ad340bc325d97cea8d0f9dd53f

Cast result of round() to int.

Change-Id: Ib708fddfadde4c765001ce9723fda113fd0f4bf6

Cast result of round() to int.

Change-Id: I4982886ad4e7657b4c40d21bd850d31690a68c28

Change-Id: Ia9252ad0caa4d2bda529a3fe93efcb31e7eb2da0

Change-Id: Ia70057e11c9b3d9d4bea6fbdd08839334ed02dce

In the first coding run of a 64x64 block, check the coding mode
for each 8x8 block. Will need a second annealing stage to decide
the partition size to be encoded.

Change-Id: Ida9417805ff3358979b0c0429d4099c023c88866

Removed the comment "// __asm emms;" from all calls
to vp9_clear_system_state.

Change-Id: Ib4dae69c1cdf3f185b04184a870cd70c4d703f10

Run sub-pixel motion search when NEWMV gives lower rate-distortion
cost. This improves coding performance of derf set by 8%, std-hd by
2.2%.

Change-Id: Ife50f7fda8463927784fe59a41cc439c833e941a

Prior to this commit, both encoder and decoder reset mode/mv info from
previous frame in error resilient mode to ensure bitstreams are able to
decode when there is loss of frame in decoder side. However, this is
not necessary. This commit changed to remove the reset, so encoder can
continue to use mode/mv/partition information from previously encoded
frame without affecting decodeablilty under loss of frame.

Change-Id: I0279f862900dc647fb471ae3389770bb1b9f454f

In rtc coding mode, the encoder is running non-RD mode decision. It
does not need dual buffer swap as was the case in the RD mode. This
commit initializes the internal buffer pointers outside the block
coding loop for rtc mode.

Change-Id: Ie076705c60d6b7919217e3f1dfd49e7db5064ac2