git.videolan.org Git - x264.git/summary

Les articles publiés sur le site

• Revise the row VBV algorithm

  22 septembre 2015, par Anton Mitrofanov

  Revise the row VBV algorithm
  

  • [DH] encoder/ratecontrol.c

• Fix high bit depth lookahead cost compensation algorithm

  22 septembre 2015, par Anton Mitrofanov

  Fix high bit depth lookahead cost compensation algorithm
  
  Now high bit depth VBV should act more like 8-bit depth one.
  

  • [DH] encoder/ratecontrol.c
  • [DH] encoder/slicetype.c

• Correctly update the intra row predictor in B-frames

  22 septembre 2015, par Anton Mitrofanov

  Correctly update the intra row predictor in B-frames
  
  It was previously used but never updated from it's initialization value.
  

  • [DH] encoder/ratecontrol.c

• Change the predictors update algorithm

  22 septembre 2015, par Anton Mitrofanov

  Change the predictors update algorithm
  
  Keep predictor offsets more stable. This should fix VBV misprediction in frames
  with a large difference in complexity between the top and bottom parts.
  

  • [DH] encoder/ratecontrol.c

• arm : Implement x264_mbtree_propagate_{cost, list}_neon

  3 septembre 2015, par Martin Storsjö

  arm: Implement x264_mbtree_propagate_{cost, list}_neon
  
  The cost function could be simplified to avoid having to clobber
  q4/q5, but this requires reordering instructions which increase
  the total runtime.
  
  checkasm timing       Cortex-A7      A8      A9
  mbtree_propagate_cost_c      63702   155835  62829
  mbtree_propagate_cost_neon   17199   10454   11106
  
  mbtree_propagate_list_c      104203  108949  84532
  mbtree_propagate_list_neon   82035   78348   60410
  

  • [DH] common/arm/mc-a.S
  • [DH] common/arm/mc-c.c