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In frame parallel decode, libvpx decoder decodes several frames on all
cpus in parallel fashion. If not being flushed, it will only return frame
when all the cpus are busy. If getting flushed, it will return all the
frames in the decoder. Compare with current serial decode mode in which
libvpx decoder is idle between decode calls, libvpx decoder is busy
between decode calls.

Current frame parallel decode will only speed up the decoding for frame
parallel encoded videos. For non frame parallel encoded videos, frame
parallel decode is slower than serial decode due to lack of loopfilter
worker thread.

There are still some known issues that need to be addressed. For example:
decode frame parallel videos with segmentation enabled is not right sometimes.

* frame-parallel:
  Add error handling for frame parallel decode and unit test for that.
  Fix a bug in frame parallel decode and add a unit test for that.
  Add two test vectors to test frame parallel decode.
  Add key frame seeking to webmdec and webm_video_source.
  Implement frame parallel decode for VP9.
  Increase the thread test range to cover 5, 6, 7, 8 threads.
  Fix a bug in adding frame parallel unit test.
  Add VP9 frame-parallel unit test.
  Manually pick "Make the api behavior conform to api spec." from master branch.
  Move vp9_dec_build_inter_predictors_* to decoder folder.
  Add segmentation map array for current and last frame segmentation.
  Include the right header for VP9 worker thread.
  Move vp9_thread.* to common.
  ctrl_get_reference does not need user_priv.
  Seperate the frame buffers from VP9 encoder/decoder structure.
  Revert "Revert "Revert "Revert 3 patches from Hangyu to get Chrome to build:"""
 Conflicts:
       test/codec_factory.h
       test/decode_test_driver.cc
       test/decode_test_driver.h
       test/invalid_file_test.cc
       test/test-data.sha1
       test/test.mk
       test/test_vectors.cc
       vp8/vp8_dx_iface.c
       vp9/common/vp9_alloccommon.c
       vp9/common/vp9_entropymode.c
       vp9/common/vp9_loopfilter_thread.c
       vp9/common/vp9_loopfilter_thread.h
       vp9/common/vp9_mvref_common.c
       vp9/common/vp9_onyxc_int.h
       vp9/common/vp9_reconinter.c
       vp9/decoder/vp9_decodeframe.c
       vp9/decoder/vp9_decodeframe.h
       vp9/decoder/vp9_decodemv.c
       vp9/decoder/vp9_decoder.c
       vp9/decoder/vp9_decoder.h
       vp9/encoder/vp9_encoder.c
       vp9/encoder/vp9_pickmode.c
       vp9/encoder/vp9_rdopt.c
       vp9/vp9_cx_iface.c
       vp9/vp9_dx_iface.c

This reverts commit a18da976.

Change-Id: I361442ffec1586d036ea2e0ee97ce4f077585f02

+ nearest for consistency

near is a reserved word in windows builds so using it as a parameter
name may cause build failures with some configurations

Change-Id: Iddf1d4ecdb39843f14e95dbfd9dca55f07f81403

The previous patch "Fix issues in 32bit PIC enabled build" fixed
the x86inc.asm for macho32. Now we can enable use_x86inc while
building libvpx for 32bit pic enabled Darwin target, which makes
the encoder a lot faster(>2X) in this case by turning on the
existing optimizations.

Change-Id: I5f5c7add428d73f50c935c48d0a70aed2b1eb7af

When referencing RTCD functions make sure the relevant
header file is included.

Change-Id: Ia0d7112d4aff9b4d8fa94648f0702371b7484031
https://code.google.com/p/webm/issues/detail?id=937

gives a better summary of what is enabled / disabled outside of the
automatic toolchain options.

fixes issue #936

Change-Id: I1bf27593a5512713aab1473cb606c58cf3084d62

Remove damping parameter and use the damping
formula introduced by Yaowu Xu in all cases.

Change-Id: I18db7e0d0f262d5140102f259ab07821d374d285

1. reduce the size of temporaray arrays on stack
2. avoid build_tree_distribution for tx size that is not used at all.

Change-Id: I0f8d7124e16a3789d3c15ad24cf02c1c12789e2c

Prevent from using wrong mv for denoiser motion compensation.

Change-Id: Ifa0f9daabdbdab0900d3c17304059fe0d15de914

This patch was to fix issue 924:
https://code.google.com/p/webm/issues/detail?id=924

The SECTION_RODATA macro was modified to support macho32 format.
The sub-pixel functions were modified to pass in 2 more parameters
to handle the global offsets for PIC build.

Change-Id: I3bfcd336bcae945edf300bca4ab40376a2628cd4

Prevent out of bounds access when attempting to increase frame size

Change-Id: I710c40c692802a72963c9680c2125da17f9060a9

On Nexus 7 speed -6 saw ~18% increase in perf.

Tested on Nexus 7, built with ndk r10d, gcc 4.9.

BUG=https://code.google.com/p/webm/issues/detail?id=908

Change-Id: I70ccdea0326750552ed946fb004507d6efe02d5c

On Nexus 7 speed -6 saw ~15% increase in perf.

Tested on Nexus 7, built with ndk r10d, gcc 4.9.

BUG=https://code.google.com/p/webm/issues/detail?id=908

Change-Id: I4b2006b644c488f42bf06d8a22ef0e6120a96bf9

On Nexus 7 speed -6 saw ~30% increase in perf.

Tested on Nexus 7, built with ndk r10d, gcc 4.9.

BUG=https://code.google.com/p/webm/issues/detail?id=908

Change-Id: Id12af7d1883243c23e6692e898aea82299633d58

The current method doesn't work with Xcode 4 and up, since they no
longer have a $DEVELOPER_DIR/SDKs directory. Using xcrun and xcodebuild
works all the way back to Xcode 3 on OS X 10.6 Snow Leopard, if not
earlier.

Change-Id: I7126f2fb4a8f1d6e46f921e70bbd090f00ce3d36

Floating point is used in vp9_convert_qindex_to_q(), so sometime unit
test ActiveMapTest would cause run time error without properly call
to clear_system_state to reset register status.

Change-Id: I181e9395148c44a6ca8b97d6e109bd4a152143c6

Add distortion threshold condition to refresh state of a coding block,
and allow for qp adjustment also for some intra modes and non-zero motion modes.

Also some code cleanup (remove unused variables/code).

Change-Id: I735fa2b28bc64f60e0323976b82510577b074203

Currently disabled by default: enabled using
#define GROUP_ADAPTIVE_MAXQ

In this patch the active max Q is adjusted for each GF
group based on the vbr bit allocation and raw first pass
group error.

This will tend to give a lower q for easy sections
and a higher value for very hard sections. As such it is
expected to improve quality in some of the easier
sections where quality issues have been reported.

This change tends to hurt overall psnr but help
average psnr. SSIM also shows a small gain.

Average results for derf, yt, std-hd and yt-hd test sets were
as follows (%change for average psnr, overal psnr and ssim):-

derf +0.291, - 0.252, -0.021
yt +6.466, -1.436, +0.552
std-hd +0.490, +0.014, +0.380
yt-hd +5.565, - 1.573, +0.099

Change-Id: Icc015499cebbf2a45054a05e8e31f3dfb43f944a

Change-Id: I7e96509ffa36899fcd2935749927a1e8aac8d025

On Nexus 7 speed -5 got ~2%, -6 got ~15%, -7 and -8 got ~30%
increase in perf.

Tested on Nexus 7, built with ndk r10d, gcc 4.9.

Change-Id: I83246d63b96674d170098a572fa4fe28a05aaf51

the result should have both bits set; previously this was converted from
webp incorrectly and resulted in a boolean check...

Change-Id: I2a7c7f2b491945f3a536ab4fca02247eccc892b8

Add parentheses to bit operations.

Change-Id: I095d601f0631d055adc4b3a8fde70c9cbae9e749