This patch allows the encoder to skip the
un-neccessary motion search in the first pass. It
calculates the error of the zero motion vector using
the last source frame as reference and skips the
further motion search in the first pass if the error
is small.

The encoding speedup of the first pass for slideshow
videos is over 30%. Borg test shows the overall PSNR
performance remain approximately the same (derf -0.009,
hd 0.387, yt 0.021, stdhd 0.065). Individual clips may
have either PSNR gain or loss. The worst PSNR perfomance
is from yt set, with a PSNR loss of -1.1.

Change-Id: I08b2ab110b695e4689573b2567fa531b6457616e

The SSSE3 implementation might find a potential overflow issue in
its second 1-D transform, if all input residual pixels are close to
255. This commit fixes the issue and re-enables the unit test on
the SSSE3 version.

Change-Id: I0520478abdab7afd3ff2842516bec951111e9b3c

This commit reworks the unit test for 8x8 forward/inverse
transformation. It adds extreme input value test to detect overflow
issues in the intermediate steps.

It temporarily disables unit test for the SSSE3 version, which
showed overflow failure in the new test conditions.

Change-Id: I7caf10bba4b6db031add65d8c0eb99426b38aa42

Change-Id: Ib35ff854378764dc3c6745844c67a33dee545663

Right now there is just one place to check: xd->lossless and for the first
pass there is a function is_lossless_requested().

Change-Id: I949a6834e64ce51e422e2892f097f2b871b5429a

In Aq mode 2 for kf/arf/gf the segment q delta
is calculated and then applied by re-quantization without
going through the rd loop again. If the base Q != 0
but the segment Q == 0 (lossless) this can could give rise
to a situation where we have an illegal combination of
transform size and Q. (Q == 0 requires that all blocks
are coded 4x4 WHT).

Change-Id: I241a58c6494ed442e9e4630070b0cde0fb99ae45

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

Change-Id: I3f74418f07c2dfdd7725a5b4a8ef5c5f4aca6289

Revert "Fix a problem of using an uninitialized parameter"

This reverts commit 538af7db

Change-Id: I071aa9b7068ef515abb8ae9584df15067706ccb5

This reverts commit 91655042

Change-Id: I500822b03f09c64ff6ec5396c68edee9ca3b75cb

This commit applies quantization process with coarse quantization
step size to the forward transform coefficients and tests all the
inverse 16x16 DCT and ADST implementation versions with the
dequantized coefficients as input, to verify that the outcomes
match the prototype.

Change-Id: I68034a6126b45192c87d8c642155290e89bff8fa

In frame parallel decoding mode,  there will be still several frames inside
the decoder when application stop calling vpx_codec_decode to decode frames.
The application will need to keep calling vpx_codec_get_frame to get all the
remaining decoded frames in the decoder.

Change-Id: I2ce8260a91282f045bb9a6093ff8a606b1990f14

Change-Id: I52f73943194039697da6880d2da54821b2498336

This commit added a call to set speed feature before initializing
motion search, fixed the problem where unintialized search method
is used before its value being set.

Change-Id: I537e4612bf0d00fd6f51396fd222d4b3bd6fde58

By enabling the OUTPUT_YUV_SRC compiler flag, the encoder will write the raw
input to bd.yuv.

The functionality was mostly implemented, but in its previous state did not
compile.

Change-Id: Ia331ad0f4c6e6f9f51e8d42cd33ba8cc146b3dbf

Change-Id: Ic0fb8e5016d064c2227cf5d87ffba86a4303c82b

Change-Id: Ie11558c076a0161cc9608788e050b1b16e31c490