Clears "warning: 'return' with a value, in function returning void"

Change-Id: I93972610d67e243ec772a1021d2fdfcfc689c8c2

When building x86 assembly use lrand48 instead of the
undocumented inlined _rand function.

Android now supports rand()
https://android-review.googlesource.com/97731
but only for new versions. Original workaround:
https://gerrit.chromium.org/gerrit/15744

Change-Id: I130566837d5bfc9e54187ebe9807350d1a7dab2a

This commit enables a fast path computational flow for forward
transformation. It checks the sse and variance of prediction
residuals and decides if the quantized coefficients are all
zero, dc only, or more. It then selects the corresponding coding
path in the forward transformation and quantization stage.

It is currently enabled in rtc coding mode. Will do it for rd
coding mode next.

In speed -6, the runtime for pedestrian_area 1080p at 1000 kbps
goes down from 14234 ms to 13704 ms, i.e., about 4% speed-up.
Overall coding performance for rtc set is changed by -0.18%.

Change-Id: I0452da1786d59bc8bcbe0a35fdae9f623d1d44e1

s/"\$avx2_x86inc"/"avx2"/

avx2 code is all intrinsics and as a result doesn't rely on x86inc.asm

Change-Id: I76ad39474d8a00658f3e43131830ef0f4f34772a

tests failing under Win32/Win64

+ variance_test: add missing avx2 functions (partially disabled)

Change-Id: I6abc0657ea076379ab9ca65c12678b9ea199849d

tests failing under Win32/Win64

+ sad_test: add missing avx2 functions (disabled)

Change-Id: I8224fba2b270f6039ab1877d71e1e512f0081856

In non frame-parallel decoding, this works the same way as
current decoding scheme. Every time after decoder finish
decoding a frame, it will swap the current mode info pointer
and  previous mode info pointer if the decoded frame needs
to be shown. Both mode info pointer and previous mode info
pointer are from mode info arrays.

In frame-parallel decoding, this will become more complicated
as current frame's mode info pointer will be shared with next
frame as previous mode info pointer. But when one decoder
thread finishes decoding one frame and starts to work on next
available frame, it needs to retain the decoded frame's mode
info pointers until next frame finishes decoding. The mode info
index will serve this purpose. The decoder will use different
buffer in the mode info arrays and use the other buffer to save
previous decoded frame’s mode info.

Change-Id: If11d57d8eb0ee38c8876158e5482177fcb229428

tests failing under Win32/Win64

+ dct16x16_test: add missing avx2 functions (partially disabled)

exercises the forward transforms
no idct/iht implementations, so the c-code is used

Change-Id: I04f64a457fa0828a00f32b5c9fe4f55294f21f61

tests failing under Win32/Win64

Change-Id: I5d49d11911bcda3a832b14efe5500d22597bedcf

As a side-effect, the sad unit tests for VP8 and VP9
had to be separated.

Fixes a bug in original patch:
(https://gerrit.chromium.org/gerrit/#/c/70163/8)
that was reverted due to a nightly test failure.

Change-Id: Ia2a4e9e278fd3c89d6c3c82fcc6381320ec2a8a6

This reverts commit 91655042

Change-Id: I500822b03f09c64ff6ec5396c68edee9ca3b75cb

An overflow issue could potentially happen in the second round 1-D
transform of the SSSE3 full inverse 16x16 2D-DCT. This commit fixes
this issue.

Change-Id: Ia19e4888fda1cc929a28a5f89a5beec612d628dc

Change-Id: I87b7c657d8813d7fb383ab519d150c0ffb1dd377

This commit enables SSSE3 implementation of the inverse 2D-DCT
with only first 10 coefficients non-zero. It reduces the runtime
of SSE2 version from 745 cycles to 538 cycles, i.e., 27% speed-up.

Change-Id: I18ba4128859b09c704a6ee361d69a86c09fe8dfe

Need to include math.h before tmmintrin.h in some versions of MSVS.

Change-Id: Ia6b83ae599316887ecf30c4e4b9e4355fb8a4219

This reverts commit e8bbb3d9.

Change-Id: Ie368d36fd249d323d859d208609c711f04537bbc

The subpixel SSSE3 was fixed in this patch:
https://gerrit.chromium.org/gerrit/#/c/70283/
So the equivalent AVX2 is fixed accordingly.

Change-Id: Ieebbc1949c99d34b12b8b47692df71aca5001f3a

This commit enables the SSSE3 implementation of full inverse 16x16
2D-DCT. The unit runtime goes down from 1642 cycles to 1519 cycles,
about 7% speed-up.

Change-Id: I14d2fdf9da1fb4ed1e5db7ce24f77a1bfc8ea90d

In 8-tap filtering, to guarantee the intermediate results fit in
16 bits, the order of accumulating the products needs to be done
correctly, and the largest product should be added last. This
patch fixed the problem using the method in commit "Correct ssse3
8/16-pixel wide sub-pixel filter calculation".

Change-Id: I79d0ad60c057b15011ece84cda9648eee0809423

As a side-effect, the sad unit tests for VP8 and VP9
had to be separated.

Change-Id: I068cc2391eed51e9b140ea6aba78338c5fec8d71

As mismatchs were found  between the intrinsic version and c only. The
commit temporarily revert to use the matching assembly version to
allow further investigation.

Change-Id: I08436c47d4888b562c0eac8e8856d90a831442df

This did the same correction as the one in commit "Correct ssse3
8/16-pixel wide sub-pixel filter calculation" to avoid saturation
during filtering.

Change-Id: Ife9aa3f62daf9114eb24fe38f7baa3c3f361b2d6

Change-Id: I9120a87e27e73e496932d11716937e2fad246521

Renames all x86_64 specific assembly files to consistently
end in _x86_64.asm. This will be useful for build systems to
handle these files differently.
All new 64-bit specific assembly files should use the new
naming convention.

Change-Id: I36c89584967c82ffc4088b1b5044ac15d2bb7536

The final goal is eventually to get rid of both itxm_add and fwd_txm4x4.
This patch does it in the decoder.

Change-Id: Ibb3db57efbcbb1ac387c6742538a9fcf2c6f24a5

This is needed for profiles 1 and 2.

Change-Id: I5dd7644c2932d055ab89e050d4be7d4117cd1028

The current decode_tiles decodes the frame one tile by one tile
and then loopfilter the whole frame or use another worker thread to
do loopfiltering.

|------|------|------|------|
|Tile1-|Tile2-|Tile3-|Tile4-|
|------|------|------|------|

For example, if a tile video has one row and four cols, decode_tiles
will decode the Tile1, then Tile2, then Tile3, then Tile4.
And during decode each tile, decode_tile will decode row by row in
each tile.

For frame parallel decoding, decode_tiles will decode video in row order
across the tiles. So the order will be:
"Decode 1st row of Tile1" -> "Decode 1st row of Tile2"
-> "Decode 1st row of Tile3" -> "Decode 1st row of Tile4"
-> "Decode 2nd row of Tile1" -> "Decode 2nd row of Tile2"
-> "Decode 2nd row of Tile3" -> "Decode 2nd row of Tile4"-> "loopfilter 1st row"

Change-Id: I2211f9adc6d142fbf411d491031203cb8a6dbf6b

Change-Id: I9ef40f3d95ab8f94f69e92ea25678a40956bc1ce

Change-Id: I7ed7fecc959c6598ff98895f1a5cf7e11ac1615f

Make all post-processor code conditionally
compilable based on the CONFIG_VP9_POSTPROC
macro.

Also, remove the vizualization code from VP9
since it is out of date and will not compile.

Change-Id: I1e9e13a09ecd43e9a3f3704c175ae8cd258ababd

This reverts commit 7ab9a958

Nightly test http://build.webmproject.org/jenkins/view/libvpx-nightly-tests/job/libvpx%20unit%20tests%20(valgrind-2)/arch=x86_64-linux-gcc,filter=-*VP8*:*Large.*/276/console

Failed 

This patch did not address all the assembly issues 
some of the vp8 assembly counts on 5 arguments being passed in to this function:   

one example : vp8_sad8x16_wmt

Please address or split this into vp9 and vp8 patches.

Change-Id: I78afcc171649894f887bb8ee3c66de24aaddc7ca

Change-Id: Id401da740b0a0141caaef9e1bcccd981e5cef4a4

vp9_block_error_sse2 can only handle 16 bytes at a time but
the function requires to handle a sequence of 32 bytes at a time
so each 16 bytes is handled in a different register.
With AVX2 optimization the 32 bytes can be handled in one register instead
of two in the SSE2
The vp9_block_error was optimized by 85%.
The user level was optimized by 1.2%

Change-Id: Ia8fffe60e61eff7432a5fbd538757894f6c319fd

Change-Id: I0315cea6a5e58182bc2556e9825ec2ef0b1480c3

As a side-effect, the max_sad check is removed from the
C-implementation of VP8, for consistency with VP9, and to
ensure that the SAD tests common to VP8/VP9 pass.
That will make the VP8 C implementation of sad a little slower
but given that is rarely used in practice, the impact will be
minimal.

Change-Id: I7f43089fdea047fbf1862e40c21e4715c30f07ca

The warning messages complained that there are unused arguments
in a few prediction modes. This structure was designed on purpose,
such that a wrapper function can cover all prediction mode cases
and make them readily accessible as an pointer array.

This commit silences such warnings.

Change-Id: I7036b6bdb70747e5327d8f6fceb154f100abc4c0

Change-Id: I04930aca2293ebbaeb96dfedd2f9c5a55762fd2e

Inline loopfilter has been already handled in vp9_decode_frame().
Collecting all similar code in one place now.

Change-Id: I358a0280fc7c2b27cca520bc1e8c16c4eb6491dd

Allow selectively building just the intrinsics for armv8

Change-Id: I2f29b2e4508b8b8e5649c2906b3159ad1d4ec477

Change-Id: Ib0a73d4863478f9b8a00976379d25d2f6ebbb197