[FFmpeg-cvslog] Merge remote-tracking branch 'rbultje/vp9-bugfixes'

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Mon May 18 02:35:12 2015 +0200| [451be676f3ff2e30d34d48aebe59bd791ce4d48f] | committer: Michael Niedermayer

Merge remote-tracking branch 'rbultje/vp9-bugfixes'

* rbultje/vp9-bugfixes:
  vp9: match another find_ref_mvs() bug in libvpx.
  vp9: fix scaled motion vector clipping for sub8x8 blocks.
  vp9: improve signbias check.
  vp9: don't allow compound references if error_resilience is enabled.
  vp9: clamp segmented lflvl before applying ref/mode deltas.
  vp9: reset loopfilter mode/ref deltas on keyframe.
  vp9: fix crash when playing back 440/440 content with width%64<56.
  vp9: extend loopfilter workaround for vp9 h/v mix-up to work for 422.
  vp9: clip motion vectors in the same way as libvpx does.
  vp9: set skip flag if the block had no coded coefficients.
  vp9: apply mv scaling workaround only when subsampling is enabled.
  vp9: read all 4x4 blocks in sub8x8 blocks individually with scalability.
  vp9: fix segmentation map referencing upon framesize change.
  vp9: disable more pmulhrsw optimizations in idct16/32.
  vp9: disable all pmulhrsw in 8/16 iadst x86 optimizations.

Merged-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=451be676f3ff2e30d34d48aebe59bd791ce4d48f
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