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

If show_existing_frame indicates that the decoder should
display an existing (previously decoded) frame, add a
check to make sure that the signaled buffer does contain
a valid decoded frame.

Change-Id: Iac8c686b321827414d69a3f2d0467566911bcba2

for ABSDATA mode, so segment loop filter level always fall in valid
range for both Absolute and delta modes.

Change-Id: If90df3411479533dbdab63f8ae088d2f5dd174a9

The qindex for a segment was not clamped in ABSDATA mode, which may
cause invalid memory access if an ill-formed stream has a negative
value in ABSDATA mode. This commit added clamp to make sure qindex
for a segment always fall into valid range.

Change-Id: I0a74d00f4ef40aec7edaeca1d03c8645e23ab08c

Change-Id: I5b3918441f63ceb7889dcf546e9a2d781be4a3cb

Skip coefficient cost update in non-RD mode decision setting. Allow
periodical mode and motion vector cost update. Currently every other
8 frames. The increment runtime is a constant number. Hence more
visible for CIF resolution, while negligible for 1080p.

Speed -6 compression performance for rtc set is improved by 4.5%.

Change-Id: I27e0ad7c521fcc2af1d825582cbdd1a27ac4c323

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

Change-Id: I8cc38fdef6a2a0968af8dfe15e7c2b3c46c531ea

* Reduce the number of short cirtcuit checks by pre-computing and combining like checks.
* Postpone non-trivial initializations until after the shortcircuits are evaluated.
* Add some consts and const pointers.

No change to the actual results of the call or output of the encoder.

Change-Id: Ie44c4702aec6e08cfe0b8b0ba3cd6b57206478d1

This commit enables the use of DC, vertical, and horizontal intra
prediction mode in rtc non-RD mode decision. When the best cost value
of inter modes is above a given threshold, the encoder runs the
above three intra modes and selects the one that has minimum
prediction residual in terms of SAD.

This together with recent changes on non-RD mode decision and coding
control improves compression performance of speed -6 by
derf  91%
yt    61%
hd    46%
stdhd 52%

In terms of encoding speed, it is about 3 times faster than speed -5.

Change-Id: I6b483bfd0307e6482bb22a6676ae4e25a52b1310

When non-RD coding decision is used in rtc mode, the alt reference
is not used for inter frame prediction. This commit disabled alt ref
option whenever speed -6 is used.

Change-Id: I0b33ca03661de1db2d9bef1bcbff848cd4c9396f

Change-Id: I8eeec70a7d4403243762f14d0b560792801645e8

Cast result of round() to int.

Change-Id: Ib708fddfadde4c765001ce9723fda113fd0f4bf6

Cast result of round() to int.

Change-Id: I4982886ad4e7657b4c40d21bd850d31690a68c28

Avoid special context setting for alt-ref in svc mode.

Change-Id: I5337d0739abe16aab7854bcaa3c8537191c4b60c

Change-Id: Ia9252ad0caa4d2bda529a3fe93efcb31e7eb2da0

This variable takes control parameters for vp9 encoder, hence
renamed vp9_cfg.

Change-Id: I9b253c41a06e44d97fe699f26005cd71e2eeb36c

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

Change-Id: I48c9e5e4ca21e11740c750ca2eabf7e8a51c52d2

Hiding vp9_find_mv_refs_idx() inside vp9_mvref_common.c, moving definition
of vp9_find_mv_refs() to vp9_mvref_common.c.

Change-Id: I0c9f34b03648785a7d18edf6d4fddd34e55dfcc5

Change-Id: I9d036244b558765b252d8c6681b22721cb2e51bb

Change-Id: I389790f1ad0dd40816a7ae1ddad4a5c46278cff3

- place extern within the macro
- use in the header only

Change-Id: I4274b345d8af9ef329c0eb9553a3ddaad70d1d26

Removes unnecessary casts and silences warnings.

Change-Id: Ic516a909a2b3748831be6717f02d86ca60190af3

Change-Id: I0f2d5155ec042e9b5cbe9a9d6b186b121ed7737f

+ fix formatting

Change-Id: I7b4ec11b7b46d8926750e0b69f7a606f3ab80895

+ fix formatting

Change-Id: I344d4de089d03e403f0c7b3e64aeb7086cce86ac

+ fix formatting

Change-Id: Ia62610bff3d63855104366d7860749b6a3cf4577

clamp() wants an int, round returns a double, warning! Too bad we can't just use lrint.

Change-Id: I9c08289dde742fac0d673df8559a1892edcd1bc7

This happens when exiting single_motion_search() early due to adaptive_motion_search.

Change-Id: Ic396e7e31e59ff219bb66a459c873c9e5b17400d

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

Change-Id: Ib4dae69c1cdf3f185b04184a870cd70c4d703f10

In good quality mode motion search, the best matches are normally
found after searching in a large area. In real time mode, to make
encoding fast, a center-biased fast HEX search is used, which
converges quickly most of the time. A 4-point diamond search is
also carried out as the following refining search, which gives more
precise results, and maintains good motion search quality.

At speed 5, the borg test on rtc set showed an overall PSNR loss of
0.936%. The encoding speed gain is 4% - 5%.

Change-Id: I42cd68bb56a09ca1b86293c99d5f7312225ca7ae

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

Change-Id: Ife6131d31882177953a22a69d25adc35940429ed

Passing block MV pointer instead of block index into
vp9_full_search_sad{, x3, x8} functions.

Change-Id: Ica07356633471c2c8f81b583a7aeba85a436bafb