Makes cost_coeffs() a lot faster:
4x4: 236 -> 181 cycles
8x8: 888 -> 588 cycles
16x16: 3550 -> 2483 cycles
32x32: 17392 -> 12010 cycles

Total encode time of first 50 frames of bus (speed 0) @ 1500kbps goes
from 2min51.6 to 2min43.9, i.e. 4.7% overall speedup.

Change-Id: I16b8d595946393c8dc661599550b3f37f5718896

4x4: 234 -> 236 cycles
8x8: 878 -> 888 cycles
16x16: 3664 -> 3550 cycles
32x32: 18134 -> 17392 cycles

Change-Id: I37a51bfbb0060a3a54f09c6045c14a989811ed78

Cycle timings for first 3 frames of bus (speed 0) at 1500kbps:
4x4: 298 -> 234 cycles
8x8: 1227 -> 878 cycles
16x16: 23426 -> 18134 cycles
32x32: 4906 -> 3664 cycles

Total encode time of first 50 frames of bus @ 1500kbps (speed 0) goes
from 3min0.7 to 2min51.6 seconds, i.e. 5.3% faster.

Change-Id: I68a0e1b530b0563b84a67342cca4b45146077e95

This commit replaces zrun_zbin_boost, a method of biasing non-zero
coefficients following runs of zero-coefficients to be rounded towards
zero, with an explicit skip-block choice in the RD loop.

The logic is basically that if individual coefficients should be rounded
towards zero (from a RD point of view), the trellis/optimize loop should
take care of it. If whole blocks should be zero (from a RD point of
view), a single RD check is much more efficient than a complete
serialization of the quantization loop.

Quality change: derf +0.5% psnr, +1.6% ssim; yt +0.6% psnr, +1.1% ssim.
SIMD for quantize will follow in a separate patch. Results for other
test sets pending.

Change-Id: Ife5fa641163ac5150ac428011e87188f1937c1f4

Change-Id: I379617c1c731a686b3f7e032b8805860c1055b12

This commit change the partition search order to allow checking of
rectangular partition to be done after square partitions. It also
added a speed feature to skip rectangular partition check when
NONE is better than SPLIT in RD sense.

This feature roughly speed up encoder by 1.5X with loss on compression
-0.91% on cif set
-0.56% on stdhd set

Change-Id: I0d2d06993041aa9ea9073fcc39c54f73a127dfa4

Change-Id: I0b2be0ec2c410a527f88b95a44f24ac967b2dac1

- Added vp9_loop_filter_horizontal_edge_neon and
  vp9_loop_filter_vertical_edge_neon.
- The functions are based off the vp8 loopfilter
  functions.
- Matches x86 md5 checksum.

Change-Id: Id1c4dddb03584227e5ecd29f574a6ac27738fdd0

Encoding time of first 50 frames of bus @ 1500kbps (speed 0) goes from
3min15.0 to 3min10.9, i.e. 2.1% faster overall.

Change-Id: If592ee99be09bcd34a7c8498347f44e7305e982c

...to recently added SubpelVarianceTest

Change-Id: I8775e39fd5dbfba81ad42b79b47bf6dd6ca8cc0e

This commit enables configurable reference buffer pointer for intra
predictor. This allows later removal of spatial dependency between
blocks inside a 64x64 superblock in the rate-distortion optimization
loop.

Change-Id: I02418c2077efe19adc86e046a6b49364a980f5b1

Use vpx_memset for updating the partition contexts. Thanks to Noah
for pointing out the need of refactoring in this part.

Change-Id: I67fb78429d632298f1cd8a0be346cc76f79392a6

Change-Id: I0c097567adab24215d807963ccb34810a2afe007

This function is empty, hence is removed.

Change-Id: Ia9d01710806bffe0398a6dc9405f8a5a81b27d74

Change-Id: Ieb989830f49e6708ee7728eddebf7a2144c37c6f

Change-Id: I38fac90e0ed25cb747453ab1d6396187cf5ef3b9

Also tweaks to other features and experiments with
what is on and off at different speed settings.

Change-Id: I3e1d0be0d195216bf17c2ac5df67f34ce0b306b2

comment out some unused parameters and adjust the format to avoid:
./test/fdct4x4_test.cc|27| warning C4138: '*/' found outside of comment

Change-Id: I60f93b4c3cd7e8d61f0de80019f3404b40161f03

Using consistent function and variable names.

Change-Id: I2deb3fded8797453a2081836c9ce2e79ade06eb7

The aligned array in parameter list caused win32 build to report
c2719 error. This commit fixed the issue by make the parameter
type a pointer instead of an array.

Change-Id: I4ed654ce4eba2db4995d9cdc136c68e9a6acc992

Each frame we reset all adaptive thresholds to MAX
rather than base. As modes are picked their thresholds
drop down.

Change-Id: Ia37f03a73003c2d9bfcda57edea07205e9a0e5e8

Renamed cpi->sf.first_step to cpi->sf.reduce_first_step_size
and changed its meaning such that it is a delta applied to
reduce the default first step size (>> x) in the motion search
rather than an absolute value.

The default first step size is already changed according to the image
dimensions (smaller for smaller images). cpi->sf.reduce_first_step_size
now applies a further correction from the default.

Change-Id: Ia94e08bc24c67b604831f980909af7e982fcd16d