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Runs about twice as fast as C

BUG=webm:1027

Change-Id: I6760d99f4e22259439ca35d746194b12a81bfa71

BUG=webm:1027

Change-Id: Ibe58781905b372b9fe29dace39b4bfdd33fd0f83

1. Skip golden non-zeromv and newmv-last for bsize >= 16x16 if the
temporal variance obtained from choose_partitioning is very low.
2. Skip horz and vert INTRA mode for speed 8.

This change works best on the clips with little noise and with some
motion (e.g. gips_motion which has > 5% speed up). PSNR drop is 1.78%
on rtc test set, no obvious visual quality regression found.

Change-Id: Ib43b5b20e67809d03c5a6890818ddff59e1fc94a

For 1 pass vbr.

Change-Id: I6c1c1cca3944150140e896e175b07ed518641b9b

Fixed cosmetic issues noted in Change 349854.

Change-Id: I1d94070e4066fa920173013c5a36a30dd1cb357d

* changes:
  fdct8x8_test: fix unsigned overflow
  fdct4x4_test: fix unsigned overflow

To make coefficient checking consistent with the VP9 spec sections
8.7.1.6 and 8.7.1.1.

Change-Id: I92e38e89a41d1e482317bb478c48ffa608d2d6ee

Move initialization of a some new "twopass" values
to the function vp9_init_second_pass() and some other
small  changes.

Remove #if GROUP_ADAPTIVE_MAXQ as this is always
enabled now.

Change-Id: I1dbec2fd7c419779848aa987c4cd7824d4df8456

vp9_prob_diff_update_savings_search_model

updated in:
19e0b406 Refactor probability savings search.

Change-Id: I13ae3106961f0271f51df17ee1c70c99f2d75f8f

the difference between src and dst will be signed, the error will be
unsigned.
quiets -fsanitize=integer:
unsigned integer overflow: 4294967295 * 4294967295

Change-Id: I580813093ee46284fde7954520dfcb1188f79268

the difference between src and dst will be signed, the error will be
unsigned.
quiets -fsanitize=integer:
unsigned integer overflow: 4294967295 * 4294967295

Change-Id: I502fd707823c4faaa7f587c9cc0312f057e04904

On scene-cut detected frames (i.e., high_source_sad = 1), use
nonrd_pick_partition (over choose_part + select_part), as
the nonrd_pick partitioning is generally better.

Small positive increase in metrics on ytlive set (~0.5 - 1%).
Negligle overall speed decrease, as its only used on scene-cut frames.

Only affects 1 pass vbr mode, speed = 5.

Change-Id: I07c89cbdc75f5bb16eb8e0e2773ead0980d2de5c

Only affects 1 pass vbr mode.

Change-Id: Ifd7ff3771eabe322a371b35b159cace6baa3b070

This reverts commit be12fefa
and commit 057c1c40.

Also, the mismatch between the avx version and the
c version has been fixed.

BUG=https://bugs.chromium.org/p/webm/issues/detail?id=1168

For a rt encode using 1080p@60fps material, up to 11% performance
improvement overall was seen.

Change-Id: Icd1f216209ebc6fc0b8da885f32f356fa4355ed0

The eob of a block is not perperly set when skip_recode is true,
thus triggering assert(eob <= default_eob) to fail.

Change-Id: Ifecbe33dce2dc4903e0a80bd384dc09bf0dd8a44

* changes:
  configure: Add -mstackrealign flags to CFLAGS on OS/2
  vpx: Add OS/2-specific threading codes

Code cleaup, use existing rolling_actual/target metrics instead,
set threshold to get same/similar effect.

Little/no change in metrics on ytlive set.

Change-Id: I74f3c3d0a143a9cf20dc9c3dee54c0f7e6a97a51

Add a max condition and lower the min value.

No change in behavior (metrics for yt live set) for the
default min/max_gf_interval=4/16 settings.
Small positive change when min/max_gf_interval=7/16
(for 60fps clips on ytlive set).

Change-Id: I1c1d72425c86c69419ea43fb9730130e81062f91

add an upper bound to the framerate denominator above which 30fps will
be reported; fixes warning in corrupt / fuzzed files

Change-Id: I46a6a6f34ab756535cd009fe12273d83dcc1e9f1

* changes:
  vpx_dsp,add_noise: remove mmx implementation
  vpx_dsp: remove mmx variance implementations

Provides more comprehensive coverage for --enable-coefficient-checking.
The intent is to make the --enable-coefficient-checking option
consistent with the VP9 spec.

Change-Id: I12d0120756d17572ca2b2d7e6a2ab9d8071d8d58