This commit adds a configure time option used to enable strict error
checking in decoder to make sure intermediate stage cofficients of
inverse transforms are within valid range of signed 16 bit integer.

For valid VP9 input streams, intermediate stage coefficients should
always stay within the range of a signed 16 bit integer. Coefficients
can go out of this range for invalid/corrupt VP9 streams. However,
strictly checking this range for every intermediate coefficient can
be a burden for decoder, therefore such validation is only enabled
with configure option --enable-coefficient-range-checking.

Change-Id: I47d47c8c4e48a922c3d223ca59064f51b3f0f5ed

This patch allows the encoder to directly split the block
in partition search, therefore skip searching NONE. It
computes a score which measures whether 16x16 motion vectors
from the first pass in the current block are consistent with
each others. If they are inconsistent and we have enough Q
to encode, split the block directly, and skip searching NONE.

This feature is under flag CONFIG_FP_MB_STATS. In speed 2,
it further gives a speedup of 3-8% on sample yt clips as
compared to the previous version under the same flag. Overall,
the features under the flag will give 7-15% on typical yt
clips at up to 6000kbps data rate. The speedup at very high
data rate is not significant.

For hard stdhd clips:
park_joy_1080p @ 15000kbps:       504541ms -> 506293ms (-0.35%)
pedestrian_area_1080p @ 2000kbps: 326610ms -> 290090ms (+11.2%)

The compression performance using the features under the flag:
derf: -0.068%
yt:   -0.189%
hd:   -0.318%
stdhd:-0.183%

To use the feature, set CONFIG_FP_MB_STATS and turn on
cpi->use_fp_mb_stats.

Change-Id: Iad58a2966515c8861aa9eb211565b1864048d47f

This configuration has moved to vp9_rtcd_defs.pl

Change-Id: I71a31dbb8d79df226b60dd834324a5af69956c51

Merge "[spatial svc]Enabl golden frame for base layer and fix wrong ref_frame_flag for upper layers in first frame"

* changes:
  vpxdec warning errors addressed
  cast enums to int to avoid gcc warning in pred_common

Re-organize the one-byte structure for 16x16 first pass
block. Add bits to indicate motion vector directions.

Change-Id: Id10754ba343dfc712c7fed5bcc85c67fa0bbcb89

[spatial svc]Enabl golden frame for base layer and fix wrong ref_frame_flag for upper layers in first frame

Change-Id: I1fec9c084b499b2f445b79726066d01b136b59fa

Change-Id: I303213fbb0ad5fbf28f0ca17271624b75e9d6319

Change-Id: I4e2aeaef3e6efd5be3cb963d2eba5e08dc89b803

Change-Id: Ie3e478ef4fa565225d9e19a14d2f40aad966c2b6

Change-Id: Idd1327852f0df0eab0ea3b33959f2b8292b77301

Change-Id: Ia989a01d79f1f02defbeccb1b8eee23fdf5e764e

Change-Id: Ie813af24d23c7d72b38749b3382b315daf516be5

Change-Id: I1b3c5337f018dde27dc819ab18bd081d169a91e8

Change-Id: I2e2765b851fb0a1b15351c2aa0e079197cbee373

Change-Id: I9d995178fd764be252e571fa23901da0f991bbb8

Change-Id: I5b050122e6ed183a5b33c1f38e4fbf63b6721062

- output DecodeError() on failure
- remove unused includes

Change-Id: Ib5059137f7033089d4010cbdfd633861b9028718

vp9_variance8x8(), and vp9_get8x8var().

On a Nexus 7, vpxenc (in realtime mode, speed -12)
reported a performance improvement of ~1.2%.

Change-Id: I8a66ac2a0f550b407caa27816833bdc563395102

Change-Id: I3be8911121ef9a5f39f6c1a2e28f9e00972e0624

Change-Id: I991e36aa3cfa62aae6d27b253297dd9ca9e8bc12

Change-Id: Iaa40b472f6c1c48bb3bb47332b6fcf36d7f3c10e

The mb_energy value is used by aq-mode. Turn off computing its
value when aq-mode is off.

Change-Id: I26c239f124eca45a5ee58b90d19eae00d9a7cda5

Moved encode_breakout code out of handle_inter_mode().

Change-Id: Icd661136b05fdf163768c406f91e0c98a8df89eb