Change-Id: I8bfc80f4fffb0892e93d3326394a52d1ee3c0f37

Reuse the yv12_mb array to fetch the buffer pointers/strides
corresponding to the current reference frame.

Change-Id: I5276b7494158b2cccef15213be2dc189e9036851

This commit allows the encoder to account for additional chroma
plane costs in the mode decision process, if the current block
potentially contains significant color change. It improves the
visual quality at very low bit-rates.

The compression performance of dark720p is improved by 12.39% in
speed 6. For jimred at 150 kbps, the PSNR of V component (red)
increased by 0.2 dB, at the expense of about 5% increase in
encoding time. Note that for sequences where the chroma components
are fairly consistent, the encoding time increase is negligible.

On average the rtc set compression performance is improved by
1.172% in PSNR and 1.920% in SSIM.

Change-Id: Ia55b24ef23a25304f7ec9958fbf07fd6e658505c

This patch continues the work to remove frame_parallel_decoding_mode
requirement in VP9 multi-threaded tile decoder. In order to do that,
the frame counts associated to each thread need to be accumulated
together after the frame is decoded.

Change-Id: Idba1a756cedfed3c154aef52ed82c8da3bbf9e0c

The original implementation had the following comment:
// Ignore mv costing if mvsadcost is NULL

However the current implementation does not allow for this.
If x exists then nmvsadcost must not be null.

This removes the only warning from -Wpointer-bool-conversion

https://code.google.com/p/webm/issues/detail?id=894

Change-Id: I1a2cee340d7972d41e1bbbe1ec8dfbe917667085

Avoid the use of uninitialized second reference frame for fetching
reference block.

Change-Id: I9983a0daea829700b3270dc8bf2bcc6d6ea36652

This resolves the encoder crashes on windows.

Change-Id: I159d79014cf9279751e403936ce1f84482ae82da

The current multi-threaded tile decoder requires that the videoes
are encoded with frame_parallel_decoding_mode = 1. This requirement
is not necessary, and is better to be removed. This patch includes
the first part of the work.

Change-Id: Ic7695fb3cfe13f9022582c9f0edd2aa6e2e36d28

In vp8_sub_pixel_variance8x8_neon the temp2 buffer is only initialized
to kHeight8 * kWidth8. However, in the case that xoffset != 0 and
yoffset == 0, var_filter_block2d_bil_w8 is called with output_width
kHeight8PlusOne.

Thanks to cmugurel for diagnosing and yulius for the patch.

Change-Id: Ib71ffd96ffad963c92b8b7ca23f303942785b8e0
https://code.google.com/p/webrtc/issues/detail?id=4190

Apple ships version 0.98 of nasm through at least XCode 6. It is
incompatible with the assembly in libvpx.

https://code.google.com/p/webm/issues/detail?id=772

Change-Id: I33245a76f50a8224fe6fafa3cce9991f953fdcc8

Remove loop filter skip at speed 7+ because of bad visual artifacts and
up the postprocessing.

Change-Id: Ibdd0bac71aaee232d2bb2e14462733c51517768d

1. Adjusted the threshold for coef update computation based on counts
of tx used, avoid coef update computation when count is low (<20)
2. Move sf->lpf_pick = LPF_PICK_MINIMAL_LPF to speed 8.

Change-Id: I02b44309e40fcdbf135c7934ae067a3f42502d30

The merge did not merge the fix for issue #850.

Change-Id: I0dc1377dbfcb9497fb01a13d4f78ac65bff5eb33

https://code.google.com/p/webm/issues/detail?id=906

Change-Id: I72841078ff81152d21d84ccf4d5548e757685a6d

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

This fixes a crash if the firstpass file does not
exist when doing a two-pass encode.

Change-Id: I3a1a95d68d57125c63123d6208af7537f5a689a0

1. move the check of search method of USE_TX_8X8 up one level to
avoid operations of build_tree_distributions()
2. count tx used and avoid computaton for coef udpate when one size
is not used at all.

Change-Id: Ia3e54a2588aa531c41377a1bfaa64385d04a592c

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