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

Les articles publiés sur le site

• libx264 API usage example

  12 octobre 2014, par Anton Mitrofanov

  libx264 API usage example
  

  • [DH] Makefile
  • [DH] example.c

• aarch64 : NEON asm for intra chroma deblocking

  10 octobre 2014, par Janne Grunau

  aarch64: NEON asm for intra chroma deblocking
  
  deblock_h_chroma_420_intra, deblock_h_chroma_422_intra and
  x264_deblock_h_chroma_intra_mbaff_neon are ~3 times faster.
  deblock_chroma_intra[1] is ~4 times faster than C.
  

  • [DH] common/aarch64/deblock-a.S
  • [DH] common/deblock.c

• checkasm : Serialize read_time() calls on x86

  8 octobre 2014, par Henrik Gramner

  checkasm: Serialize read_time() calls on x86
  
  Improves the accuracy of benchmarks, especially in short functions.
  
  To quote the Intel 64 and IA-32 Architectures Software Developer's Manual:
  "The RDTSC instruction is not a serializing instruction. It does not necessarily
  wait until all previous instructions have been executed before reading the counter.
  Similarly, subsequent instructions may begin execution before the read operation
  is performed. If software requires RDTSC to be executed only after all previous
  instructions have completed locally, it can either use RDTSCP (if the processor
  supports that instruction) or execute the sequence LFENCE;RDTSC."
  
  RDTSCP would accomplish the same task, but it's only available since Nehalem.
  
  This change makes SSE2 a requirement to run checkasm.
  

  • [DH] tools/checkasm.c

• Update to the latest version of gas-preprocessor.pl from http://git.libav.org/?p...

  29 septembre 2014, par Anton Mitrofanov

  Update to the latest version of gas-preprocessor.pl from git.libav.org/?p=gas-preprocessor.git
  
  Contributions by Janne Grunau, Martin Storsjo, Mans Rullgard, David Conrad, Martin Aumuller and others
  

  • [DH] configure
  • [DH] extras/gas-preprocessor.pl
  • [DH] tools/gas-preprocessor.pl

• Support case-independent string options

  29 septembre 2014, par Vittorio Giovara

  Support case-independent string options
  

  • [DH] common/common.c