git.videolan.org Git - ffmpeg.git/rss log

Les articles publiés sur le site

• avcodec/asvenc,dvenc : Optimize unaligned checks away if possible

  27 mai, par Andreas Rheinhardt

  avcodec/asvenc,dvenc: Optimize unaligned checks away if possible
  
  For certain arches (AARCH64, x86, generic) get_pixels and
  get_pixels_unaligned always coincide for 8 bit input.
  In these cases it is possible to avoid checks for unaligned
  input in asvenc, dvenc.
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/asvenc.c
  • [DH] libavcodec/dvenc.c
  • [DH] libavcodec/pixblockdsp.h

• avcodec/pixblockdsp : Fix get_pixels alignment documentation

  27 mai, par Andreas Rheinhardt

  avcodec/pixblockdsp: Fix get_pixels alignment documentation
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/pixblockdsp.h

• avfilter/x86/vf_spp : Remove permutation-specific code

  27 mai, par Andreas Rheinhardt

  avfilter/x86/vf_spp: Remove permutation-specific code
  
  The MMX requantize functions have the MMX permutation
  (i.e. FF_IDCT_PERM_SIMPLE) hardcoded and therefore
  check for the used permutation (namely via a CRC).
  Yet this is very ugly and could even lead to misdetection;
  furthermore, since d7246ea9f229db64ed909d7446196128d6f53de0
  the permutation used here is de-facto and since
  bfb28b5ce89f3e950214b67ea95b45e3355c2caf definitely
  impossible on x64, making this code dead on x64.
  So remove it.
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavfilter/x86/vf_spp.c

• avcodec/pixblockdsp : Pass bits_per_raw_sample directly

  27 mai, par Andreas Rheinhardt

  avcodec/pixblockdsp: Pass bits_per_raw_sample directly
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/asvenc.c
  • [DH] libavcodec/avdct.c
  • [DH] libavcodec/dnxhdenc.c
  • [DH] libavcodec/dvenc.c
  • [DH] libavcodec/mpegvideo_enc.c
  • [DH] libavcodec/pixblockdsp.c
  • [DH] libavcodec/pixblockdsp.h
  • [DH] tests/checkasm/pixblockdsp.c

• avcodec/pixblockdsp : Improve 8 vs 16 bit check

  27 mai, par Andreas Rheinhardt

  avcodec/pixblockdsp: Improve 8 vs 16 bit check
  
  Before this commit, the input in get_pixels and get_pixels_unaligned
  has been treated inconsistenly:
  - The generic code treated 9, 10, 12 and 14 bits as 16bit input
  (these bits correspond to what FFmpeg's dsputils supported),
  everything with <= 8 bits as 8 bit and everything else as 8 bit
  when used via AVDCT (which exposes these functions and purports
  to support up to 14 bits).
  - AARCH64, ARM, PPC and RISC-V, x86 ignore this AVDCT special case.
  - RISC-V also ignored the restriction to 9, 10, 12 and 14 for its
  16bit check and treated everything > 8 bits as 16bit.
  - The mmi MIPS code treats everything as 8 bit when used via
  AVDCT (this is certainly broken); otherwise it checks for <= 8 bits.
  The msa MIPS code behaves like the generic code.
  
  This commit changes this to treat 9..16 bits as 16 bit input,
  everything else as 8 bit (the former because it makes sense,
  the latter to preserve the behaviour for external users*).
  
  *: The only internal user of AVDCT (the spp filter) always
  uses 8, 9 or 10 bits.
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/aarch64/pixblockdsp_init_aarch64.c
  • [DH] libavcodec/arm/pixblockdsp_init_arm.c
  • [DH] libavcodec/mips/pixblockdsp_init_mips.c
  • [DH] libavcodec/pixblockdsp.c
  • [DH] libavcodec/pixblockdsp.h
  • [DH] libavcodec/ppc/pixblockdsp.c
  • [DH] libavcodec/riscv/pixblockdsp_init.c
  • [DH] libavcodec/x86/pixblockdsp_init.c