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During aosp builds with binutils-2.27, we're seeing linker error
messages of this form:
libvpx.a(subpixel_mmx.o): relocation R_386_GOTOFF against preemptible
symbol vp8_bilinear_filters_x86_8 cannot be used when making a shared
object

subpixel_mmx.o is assembled from "vp8/common/x86/subpixel_mmx.asm".
Other messages refer to symbol references from deblock_sse2.o and
subpixel_sse2.o, also assembled from asm files.

This change marks such symbols as having "protected" visibility. This
satisfies the linker as the symbols are not preemptible from outside
the shared library now, which I think is the original intent anyway.

Change-Id: I2817f7a5f43041533d65ebf41aefd63f8581a452

* changes:
  ppc: Add get_mb_ss_vsx
  ppc: Add get4x4sse_cs_vsx
  ppc: Add comp_avg_pred_vsx

Change-Id: I1b54a7a5bb642e4b836d786ea1ae506eed025e3f

Change-Id: I3028bdadf653665d18e781d28e9625f62804b3d8

Change-Id: I59788cd98231e707239c2ad95ae54f67cfe24e10

Change-Id: I84e3705fa52f75cb91b2bab4abf5cc77585ee3e2

Change-Id: I3c4f9d595275669580413a71b3c3c810e7ddcacd

Increase the partition and acskip thresholds for temporal
enhancement layers.

~1-2% speedup, with negligible loss in quality.

Change-Id: Id527398a05855298ad9ddac10ada972482415627

For SVC 1 pass non-rd pickmode, the interpolation filter for the
upsampling of the golden (spatial) reference was not being explicitly
set and instead was takin gwhatever value was set in the previous
mode/block (which would be either EIGHTTAP or EIGHTAP_SMOOTH).

Fix it to the default EIGHTTAP for now, to be updated/selected
adaptively in a later change.

Minor adjustmemt to rate targeting thresholds in datarate unittests.

Change-Id: I52085048674072c6cfb7163e11e9a2658d773826

A more detailed explanation of the experimentation
leading to this change can be found in:-

https://docs.google.com/a/google.com/document/d/13lsYhxgPyxUHvEess6wg9nikaonIZKY9Ak_Lpafv5Mo/edit?usp=sharing

This change gives gains across all our standard test sets for
overall psnr, ssim, fast ssim and psnr-HVS.

Values expressed as % reduction in bitrate.

Low res set     -0.257, -0.192, -0.173, -0.101
Mid res set     -0.233, -0.336, -0.367, -0.139
High res set    -0.999, -1.039, -1.111, -0.567
NetFlix 2K set -0.734, -0.174, -0.389, -0.820
Netflix 4K set  -0.814, -0.485, -0.796, -0.839

Change-Id: Ie981fb3c895c9dfcfc8682640d201a86375db5c8

Change-Id: Ia41a11df18e5a58d2b8bbecd11c249d357de2a8f

For 1 spatial layer case, scaling_num/den was not set properly.

Change-Id: I139bf70c6dffde89eed24e435bcb5d98d2029bcd

Fix the overflow for subtraction between two unsigned integers.

BUG=webm:1432

Change-Id: I7b665e93ba5850548810eff23258782c4f5ee15a

Change-Id: I60619d28fffd9809f93b1af510a50e1aa02519a9

Introduced append situation in Commit 0178d974 which could be
confusing. Clean a little bit and add some comments.

Change-Id: I69ad336f805aca7ce9d45515b8cd237423fadbb2

Fixes a speed regression.

Change-Id: I23d942e4af17fa81fe4a366c7369b3ad537e59b0

Change-Id: I259d152c62864b365490368051f3c3b7d7f2f1c5

* changes:
  subpel variance neon: add mixed sizes
  sub pixel variance neon: use generic variance

When the noise estimate is forced off due to large motion,
reset the counter and set smaller window for next estimate.

Change-Id: Ifa4ec95396134173a00d48353ad52f1b6a40c217

Add option in SVC to set the filter type and phase for
the frame level downsampling filters.

For 3 spatial layers: set downsampling filter type to bilinear
and set phase to 8, for lowest spatial layer.

Change-Id: Id81f4b1ba93db19c1cd37b6a46d1281a2c61bc43

Makes more sense to call the corresponding partial idct C function
instead of the full idct C function as the reference.

Change-Id: Ibb7681dd063edd6307ba582c10c26c4c6a4b78c6

Change-Id: I73b8104a9e7a70ffe827c1b7ff43618f24f5d7bd

It's a bit faster to call idct4_sse2() in vpx_idct4x4_16_add_sse2()

Change-Id: I1513be7a895cd2fc190f4a8297c240b17de0f876

Base the condition on the resolution of the spatial layer.
And remove restriction on scaling factor.

Change-Id: Iad00177ce364279d85661654bff00ce7f48a672e

Read in a Q register. Works on blocks of 16 and larger.

Improvement of about 20% for 64x64. The smaller blocks are faster, but
don't have quite the same level of improvement. 16x32 is only about 5%

BUG=webm:1422

Change-Id: Ie11a877c7b839e66690a48117a46657b2ac82d4b

* changes:
  neon variance: process two rows of 8 at a time
  neon variance: add small missing sizes

* changes:
  Split dsp/x86/inv_txfm_sse2.c
  Update highbd idct functions arguments to use uint16_t dst
  Clean CONVERT_TO_BYTEPTR/SHORTPTR in idct