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Making this change in order to move allow_high_precision_mv field
from MACROBLOCKD structure to VP9_COMMON (because it is a frame level
flag).

Change-Id: I1d006ba36d938e0caf4d40fa051e2e38df9c1108

The only case where they were intentionally pointing to different
structures was in mbgraph, and this didn't have the expected behavior
because both of these pointers are used interchangeably through the code

Change-Id: I979251782f90885fe962305bcc845bc05907f80c

Moving code that gets band_translate array from get_scan_and_band()
function to get_band_translate() function. Renaming get_scan_and_band() to
get_scan().

Change-Id: I43047c205a1ca2a6e24be44db39dc04b7a385008

This should be similar to what x264 does with --aq-mode 1.
It works well with clips like parkjoy and touhou
(http://x264.nl/developers/Dark_Shikari/LosslessTouhou.mkv).
At low bitrates, the segmentation signaling overhead may negate the
benefits of this feature.

(PGW) Default changed to feature OFF to allow provisional merge.
Change-Id: I938abf9bb487e1d4ad3b0264ea03d9826275c70b

Updated the encoder to handle frames that are coded
intra-only. Intra-only frames must be non-showable,
that is, the "show frame" flag must be set to 0 in
the frame header.

Tested by forcing the ARF frames to be coded intra-
only.

Note: The rate control code will need to be modified
to account for intra-only frames better than they
are currently handled.

Change-Id: I6a9dd5337deddcecc599d3a44a7431909ed21079

Use the zcoeff_blk buffer of PICK_MODE_CONTEXT to store the indexes
of all-zero-coeff block of the current best mode. Remove the temporary
buffer best_zcoeff_blk defined in the rate-distortion optimization
loop. This improves the speed performance by about 0.5% in all speed
settings.

Change-Id: Ie3e15988ddfa581eafa2e19a8228d3fe4a46095c

This commit moves token_cache buffer into macroblock struct, instead
of defining as a local variable in cost_coeffs. This avoids repeatedly
re-allocating memory space in the rate-distortion optimization loop.

The runtime at speed 0 reduces:
bus 2000kbps, 161692ms to 159951ms
football 600kbps, 229505ms to 225821ms

Change-Id: If7da6b0b6d8c5138a16271a33c4548fba33d8840

Renames:
  vp9_short_iht4x4_add     -> vp9_iht4x4_16_add
  vp9_short_iht8x8_add     -> vp9_iht8x8_64_add
  vp9_short_iht16x16_add_c -> vp9_iht16x16_256_add

Change-Id: Ibca7a188fd062b196787ac5efc1ea545e7f166c0

Converts the constant rddiv parameter to 128 (from 100) and
implements RDCOST with bit-shift rather than multiplication.
Other parameters are also adjusted to roughly keep the same
balance between Rate and Distortion.

There is a slight speed-up of about 0.5-1% (at speed 0) as
testted on football_cif.

There is a slight change in performance due to small change
in the parameters.
derfraw300: +0.033%
stdhdraw250; +0.102%

Change-Id: I70ac69f58fa71c83108f68fe41796cd19d1fc760

The commit changes to mask available intra prediction modes for test
based on prediction block size.

With this patch, encoding time of CpuUsed 2 reduces from 10% to 20% for
HD clips with a compression drop of 0.2%

Change-Id: I65f320f1237c0f5ae3a355bf7caf447f55625455

This commit re-designs the per transformed block rate-distortion
costs tracking buffers. It removes redundant buffer usage, makes
the needed context memory allocation per VP9_COMP instance and
reuses the same buffer sets inside the rate-distortion optimization
search loop, thereby avoiding repeatedly requiring memory space.

It reduces speed 0 runtime:

bus at 2000 kbps from 166763ms to 158967ms,
football at 600 kbps from 246614ms to 234257ms.

Both about 5% speed-up. Local tests suggest about 2% to 5% speed-up
for speed 1 and 2 settings. This does not change compression
performance.

Change-Id: I363514c5276b5cf9a38c7251088ffc6ab7f9a4c3

Change-Id: Id5e31833a0ef40de9f64c2f5674af7083233bf14

Increases these parameters.
There is a small efficiency gain.

Change-Id: Ie5f0ddb39c907d335e0dafa5eb112365a81f4542
derfraw300: +0.091%
stdhdraw250: +0.238%

The intra mode distortion adjustment for skip_encode feature was
broken in the refactoring cc91851. This commit fixes it and tunes
the distortion models used therein.

Change-Id: I0d676e82f8e855536a90cf9b3e3fdefafcd886c6

Some minor cleanups in preparation for experimentation with
some encode parameters and thresholds

Change-Id: I449d66da97eae0a7acdf4aae374e2f9111342056

Use b_mode_info to store the inter prediction mode of sub8x8 block,
in replacement of the use of partition_info. Remove redundant buffer
update for partition_info. For bus_cif at 2000 kbps, this seem to make
speed 0 about 1% faster.

Change-Id: Id1b3be45e75a24fb4b42335ac480c23e440978f6

We already have itxm_add member in MACROBLOCKD structure. Both
inv_txm4x4_1_add and inv_txm4x4_add are just its special cases for
different eob values. But eob logic is already implemented in
vp9_iwht4x4_add and vp9_idct4x4_add (that's why also removing
inverse_transform_b_4x4_add).

Change-Id: I80bec9b6f7d40c5e5033c613faca5c819c3e6326

Change-Id: Id093816146de0d100f0c6ae2542aaa427dbab2d8

This commit restores the mode skip feature in the sub8x8 rd loop.

Change-Id: I5496ee32053f572b8961b549e9ecd4f1360824de

Declaring vp9_pt_energy_class in vp9_entropy.h instead of many external
places.

Change-Id: I66e8a3fc119a43f88d130d0dae4133c825a047a3

Change-Id: I8de865cd1deca07b5c92c225782f0867367e9a11

This code serves no purpose in the re-factored sub 8x8 code.

Change-Id: I5364986224d1a28b71bcb046ec8557a3d14aaa47

Change-Id: I2cc3684f416a63dc99b9303109f9850f34a470d5

This commit removes the redundant second reference frame check in
the rate-distortion optimization loop for sub8x8 blocks.

Change-Id: I13a57a6f624c4a9bcef02ff2a867fa30d8b44a93

Change-Id: Ic23a705e48cadaa7151f2bd8536d56636cb973e3

This commit defines b_mode_info as a struct type. This will allow
us to further remove the use of PARTITION_INFO in the encoding process.

Change-Id: I975b0f7d557b5e0f66545a61b472def76b671cce

Remove redundant variable definition/use in rate-distortion search
loop for regular and sub8x8 blocks, respectively.

Change-Id: Ic0eb3660bb6851ba2eb8d702ba9fd11595000d01

This commit separates the rate-distortion optimization loop of
superblocks from that of sub8x8 blocks. This allows better design
rate-distortion optimization search loop for each setting. It also
removes the use of SPLITMV and I4X4_PRED therein.

No performance change in speed 0 settings. For bus@CIF at 2000kbps,
the speed 1 runtime goes from 48009ms to 43894ms (about 10% faster).
The overall compression performance on derf changed by -0.021%.

Speed 2 runtime goes from 27114ms to 28700ms (6% slower), while the
overall coding efficiency goes up by 1.629% for derf, 1.236% for yt.

Change-Id: Ie6bdfa0a370148dd60bd800961077f7e97e67dd4

Change-Id: I9a0d0e9c3459954aa7b9c68f92cc5d56385ebd18

Substantial reworking of the speed vs quality trade offs for
speed 1 and 2.

In this patch I am attempting to freeze the "quality" meaning of
speeds 1 and 2 relative to speed 0 so that in future we can
better evaluate progress.

I am targeting :
Speed 1 quality ~-5% vs speed 0.
Speed 2 quality ~-10% vs speed 0

It is inevitable that quality will still fluctuate a little as we adjust
settings and add new features, but we will attempt to keep as
close as possible to these values. Above speed 2 things will remain
a bit more fluid for now.

In this patch speed 1 is approximately 4-5x as fast as speed 0. This
is similar to before but the quality hit is a lot less. Likewise speed 2
is approximately 2x as fast as speed 1 but is similar in quality to the
previous speed 1 configuration.

Also slight change to behavior of FLAG_EARLY_TERMINATE to insure
all reference frames get at least one rd test. Important for very low
variance regions.

WIP :- Added a new speed level with old speed 4 becoming speed 5.
Speed 3 and 4 tradeoffs still WIP

Change-Id: Ic7a38dd7b5b63ab1501f9352411972f480ac6264

Change-Id: I6be72c8b048d1ccc7ef43764cf84c32360098970

Don't divide RDMULT and RDDIV by 100 when RDMULT > 1000. This was
probably done to avoid overflow when the rd cost was stored in a 32 bits
integer but this is not the case anymore. This change will make it easier
to support multiple quantizers per frame.

derf compression gain at speed 0: 0.037%

Change-Id: Ibeeb9b7cfa1a132a7af41bc90fc07a3bba0857f6

Change-Id: I60dee58a4fd24d3c4f3c101a49d30e217309f43a

Change-Id: I9795d0937bc07793c13d067281995e0750f694d9

Change-Id: Ife0dd29fb4ad65c7e12ac5f1db8cea4ed81de488

Renaming txfm_stepdown_count to tx_stepdown_count and max_txfm_size to
max_tx_size.

Change-Id: Ifc173e22c78240e561a57c4c741b64b1b8fc6fef

Updating fractional_mv_step_fp and fractional_mv_step_comp_fp function
types.

Change-Id: I601c4378bc39ac3ffd4e295d9cbd8e1f74829d46

Also removed obselete comment

Change-Id: Iae1664777d76383639c637ee786e0d50fc45819a

INT64_MAX may be assigned as RDCOST when RDCSOST computation is skipped
for speed, this commit to prevent INT64_MAX from being used as real
RDCOST in transform size decision.

Change-Id: I89a945134191bbdea1f1431ade70424ac079eaac

This commit enables forcing all coefficients zero per transformed
block, when its rate-distortion cost is lower than regular coeff
quantization.

The overall performance improvement (including its parent patch on
calculating rd cost per transformed block) at speed 1:
derf:  0.298%
yt:    0.452%
hd:    0.741%
stdhd: 0.006%

Change-Id: I66005fe0fd7af192c3eba32e02fd6d77952accb5