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Les articles publiés sur le site

• hwcontext_qsv : Support derivation from child devices

  4 mars 2017, par Mark Thompson

  hwcontext_qsv: Support derivation from child devices
  

  • [DBH] libavutil/hwcontext_qsv.c

• vf_hwmap : Add reverse mapping for hardware frames

  4 mars 2017, par Mark Thompson

  vf_hwmap: Add reverse mapping for hardware frames
  
  This is something of a hack.  It allocates a new hwframe context for
  the target format, then maps it back to the source link and overwrites
  the input link hw_frames_ctx so that the previous filter will receive
  the frames we want from ff_get_video_buffer().  It may fail if
  the previous filter imposes any additional constraints on the frames
  it wants to use as output.
  

  • [DBH] libavfilter/vf_hwmap.c

• vf_hwmap : Add device derivation

  4 mars 2017, par Mark Thompson

  vf_hwmap: Add device derivation
  
  Also refactor a little and improve error messages to make failure
  cases easier to understand.
  

  • [DBH] libavfilter/vf_hwmap.c

• hwcontext : Improve allocation in derived contexts

  4 mars 2017, par Mark Thompson

  hwcontext: Improve allocation in derived contexts
  
  Use the flags argument of av_hwframe_ctx_create_derived() to pass the
  mapping flags which will be used on allocation.  Also, set the format
  and hardware context on the allocated frame automatically - the user
  should not be required to do this themselves.
  

  • [DBH] doc/APIchanges
  • [DBH] libavutil/hwcontext.c
  • [DBH] libavutil/hwcontext.h
  • [DBH] libavutil/hwcontext_internal.h
  • [DBH] libavutil/version.h

• hwcontext : Add frame context mapping for nontrivial contexts

  4 mars 2017, par Mark Thompson

  hwcontext: Add frame context mapping for nontrivial contexts
  
  Some frames contexts are not usable without additional format-specific
  state in hwctx.  This change adds new functions frames_derive_from and
  frames_derive_to to initialise this state appropriately when deriving
  a frames context which will require it to be set.
  

  • [DBH] libavutil/hwcontext.c
  • [DBH] libavutil/hwcontext_internal.h