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Add inv_txfm and highbd_inv_txfm as facades of inverse transform
such that the code flow in encodemb.c can be simpler

Change-Id: Iea45fd22dd8b173f8eb3919ca6502636f7bcfcf7

Move txfm functions from encodemb to hybrid_twd_txfm.c
to make encodemb's code flow clear

Change-Id: If174d8ddb490d149c103e5127d30ef19adfbed13

Change-Id: I9f539491fe676898246976c91d5ac4804a155803

Expand the tokenization tree writing to support per transform block
type coding in next CLs.

Change-Id: I3560e658f89cc500eb49603f95dd2b4e99045f5b

This commit allows the codec to analyze the motion field in the
avaiable above and left neighboring area to produce a set of
reference motion vectors for each reference frame. These reference
motion vectors are ranked according to the likelihood that it will
be picked.

Change-Id: I82e6cd990a7716848bb7b6f5f2b1829966ff2483

The counts are never used when frame_parallel_decoding_mode
is set.

Change-Id: I293aa68abadcdd30973adacb9f5f5a3aecf8daa2

Reduces the transform optons for INTRA as well as INTER when
transform size is 16x16 to not use any of the DSTs.
Thus, a total of 10 options are used for 16x16, while 4x4
and 8x8 still uses 17 options.

derflr/hevchd actually improves a little, while hevcmr drops
a little.

About 10% speed improvement.

Change-Id: I920a182231e052cdd622f8bb67085c16c572cb1e

Change-Id: Ic0ec32c1d7f7c08c9f956592dccbfd9060b1f624

and fixed macro name.

Change-Id: I306b98a2b4ec80b130ae80290b4cd9c7a5363311

These primitive variables are commonly required by many other
experiments as well. The use of n4_w and n4_h was originally
introduced in the vp9 decoder implementation.

Change-Id: I93d701d891e3860f31150031e3b9a2b29a3993d2

This reverts commit d76032ae.

breaks 32-bit builds

Change-Id: If6266ec2a405b5a21d615112f0f37e8a71193858

Under the experiment of EXT_REFS: LAST2_FRAME, LAST3_FRAME, and
LAST4_FRAME.

Coding efficiency: derflr +1.601%; hevchr +1.895%
Speed: Encoder slowed down by ~75%

Change-Id: Ifeee5f049c2c1f7cb29bc897622ef88897082ecf

Change-Id: I6a360a12e8da8cdcb8a779647512591612d64f31

Change on affects 1 pass CBR.
On key frame, temporal layer_id is reset to 0 for 1 pass CBR,
but since "layer" is reset, the svc.layer_context[layer].is_key_frame
was not correspondingly set properly.

Change-Id: I08f6da0a55ac7429ccfbaddfb7be14479e43543b

Found with clang -fsanitize=integer

Change-Id: I17cb2166c06ff463abfaf9b0e6bc749d0d6fdf94

Found with clang -fsanitize=integer

Change-Id: I2538e7483cb2d5f06bceecbd3326bdd88bfecfa1

Change-Id: Ie2101e362aeb01681313adf67596bc6b479e873e

Modify h_predictor_4x4 with XMM registers.
Speed up by ~25% in ./test_intra_pred_speed.

Change-Id: Id01c34c48e75b9d56dfc2e93af12cf0c0326a279

Coding gain on derflr drops to +1.83%.

Change-Id: If68c429f09422a70513d9f1e8e36e10c928e034a