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as the name implies, the segmentation pointer can be const

Change-Id: I945f01a077c112ec86c00e35a1e9395bc230c2d9

Change-Id: I695a990689c79d160227975116125b140875aed1

Change-Id: Id9d837e062d9c4a94def4b4ed1f49a67c75d3618

Change-Id: Ib6a8360d24f44eeaec12c5055568382a105dc235

Change-Id: Ia21653a447040f1b472d21ebd19103b0558c4b16

Change-Id: Id4ec0084641d2ad4def95fb05239455fbc25f9b9

Change-Id: Ic049f0a6ce190f33859118e7b8cfcfe305979102

Change-Id: Iedf9ac460edb31d7c072e2bebd26f2afe8e6089b

Change-Id: Icda1d2d7cbfb176884fa6c7d9366a2d60e2994e9

Change-Id: Ifc7ffc02cfedb47230571298622602609a4e8a70

Speed 4 still does not give a big gain over speed 3.
This just cleans it up a little from the last patch and comments
out features that do not seem to be giving much benefit.

Change-Id: I5f366e6160e1dbe5dc45cf5eb90cc02712baa1b6

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

Change-Id: I5364986224d1a28b71bcb046ec8557a3d14aaa47

Allow selective masking of individual split modes rather than
just a single on / off flag.

For speed 2 recovers the large speed loss seen for some derf
clips  in change Ie6bdfa0a370148dd60bd800961077f7e97e67dd4
and a small quality gain.

For speed 1 10 % speed increase observed locally on some derf clips
for minimal quality change.

Change-Id: If86191087b93cbc05351c26c60c7933e2149e485

In relation to change:
Refactor inter mode rate-distortion search
 Ie6bdfa0a370148dd60bd800961077f7e97e67dd4

sf->thresh_mult_sub8x8[THR_INTRA] = INT_MAX missing;

Change-Id: Ia86b68a5073368a3e2ca124a27b632243b525c8b

Moving INTERPOLATIONFILTERTYPE enum and subpix_fn_table struct to
vp9_filter.h. Adding convenient typedef for subpel kernels.

Function vp9_setup_interp_filters() besides setting xd->subpix.filter_x &
xd->subpix.filter_y has a side effect of also setting scale factors. This
is not required inside decode_modes_b() because scale factors have been
already set by set_ref() calls. That's why replacing
vp9_setup_interp_filters() call with newly created vp9_get_filter_kernel()
call. The behavior of vp9_setup_interp_filters() is unchanged (it
is used from the encoder).

Change-Id: I3f36d3f7cd8d15195a6e2fafd1777cdaf9ecb847

Change-Id: I2cc3684f416a63dc99b9303109f9850f34a470d5

This patch reverts old commit 398ddafb
"New way of updating last frame segmentation map.".

Change-Id: Iba730f433c30ed7f5e5449d6768049cbf9a2b2c5

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