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Only use layered average size if number_temporal_layers > 1.

Also removed unneeded commented-out line, and change some parameter
setting in vpx_temporal_scalable_patterns.c

Change-Id: Ic86e43e7daf0313e8c5a4aba1497299158111955

Change-Id: I18ce84eb50283a05e149ff8211d9dc424d379b4d

Added support for external frame buffers to libvpx's VP9 decoder.
If the external frame buffer functions are set then libvpx will
call the get function whenever it needs a new frame buffer to
decode a frame into. And it will call the release function
whenever there are no more references to that buffer.

Change-Id: Id2934d005f606af6e052fb6db0d5b7c02f567522

Change-Id: I7aa0f9afbd802a1d8686cad9fc6eae4baa6a53c3

This patch fixes c++ compiler errors.

Change-Id: I4d4b5af3bdaada101d753f3bc19819f5252b4e44

Silence signed/unsigned mismatch warnings by adding casts where
ts_number_layers does not match the sign of the variable to which
it is being compared.

Change-Id: Iab25e18c877d158b2b2b417de7da94669648b2fa

Change-Id: If33a5a12c4025d9b5ec863dfccea7ee70f800665

The functionalities of set_offsets() are subsumed in later
set_partitioning() and rtc_use_partition() functions, hence removed.

Change-Id: Ie514b13cb66c2379f13d0be9b1da4c12ca4581e5

* changes:
  Remove some cases for turning off arf.
  Modified Aq1 and Aq2

Also, removed a TODO and removed speed 1 from the tests.

Change-Id: I4e6b114204b6d42d93fd1902a56eb0c459bad135

Add some rate control metrics.

Change-Id: Ie87c617bbdc31b0324c7c96a042f7bdb8aaa9c7e

Flipping arf on and off too often is hurting some clips.
This change makes no difference for 50-75% of our test
clips but helps some by a big margin. (eg. std-hd crew
by 6% and one of the YT and YT-hd clips by 14%)

Average improvements for 2 pass, speed 2 (psnr,ssim)
are as follows:-

derf  0.165%, 0.210%
yt  1.210%, 1.464%
yt-hd 1.189%, 1.471%
std-hd 1.031%, 0.886%

Change-Id: I121fe66cfb4a62d384b23b484a7d648789641969

Change-Id: I6ec6e072fcd59f9b5fac4ce221a86f9078103ae3

Change-Id: I08a4364672cf8171932e8e85fb74fcbfa4b27d2d

Change-Id: I716ea2967c6771d7adea571406f315a3197eab93

Two convolve functions were optimized for AVX2:
1. vp9_filter_block1d16_h8
2. vp9_filter_block1d16_v8
vp9_filter_block1d16_v8 was optimized for AVX2 by reducing the number of
loop strides by half, two strides were processed in parallel.
vp9_filter_block1d16_v8 was also optimized in the same way also some of the
loads were being done outside of the loop and by that preventing redundant
loads.
This Optimization gives 43% function level gain and 1.3% user level gain.
Now can be compiled in Windows

Change-Id: I2714124cfb0c14a77d7a0ce126a20db92ffbf92c

Change-Id: I39d78facc79a364cdc529b8cc4930d74f766d413

Change-Id: I668afb50614644d2eac2e968e1fafd6d73170bec