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• lavc : Use hardware config information in ff_get_format()

  26 octobre 2017, par Mark Thompson

  lavc: Use hardware config information in ff_get_format()
  
  This removes the dependency that hardware pixel formats previously had on
  AVHWAccel instances, meaning only those which actually do something need
  exist after this patch.
  
  Also updates avcodec_default_get_format() to be able to choose hardware
  formats if either a matching device has been supplied or no additional
  external configuration is required, and avcodec_get_hw_frames_parameters()
  to use the hardware config rather than searching the old hwaccel list.
  

  • [DBH] libavcodec/decode.c
  • [DBH] libavcodec/internal.h

• webp : Fix alpha initialisation

  26 octobre 2017, par Mark Thompson

  webp: Fix alpha initialisation
  
  ff_get_format() in the next patch will reject formats which aren't in the
  offered list, so the hack in 7cb9296db872c4221453e5411f242ebcfca62664 is
  no longer valid.  Change the hack by adding a new field in the VP8 decoder
  context to indicate that it's actually WebP and don't call ff_get_format()
  at all in that case.
  

  • [DBH] libavcodec/vp8.c
  • [DBH] libavcodec/vp8.h
  • [DBH] libavcodec/webp.c

• lavc : Add hardware config metadata for decoders supporting hardware output

  26 octobre 2017, par Mark Thompson

  lavc: Add hardware config metadata for decoders supporting hardware output
  
  This includes a pointer to the associated hwaccel for decoders using
  hwaccels - these will be used later to implement the hwaccel setup
  without needing a global list.
  
  Also added is a new file listing all hwaccels as external declarations -
  this will be used later to generate the hwaccel list at configure time.
  

  • [DBH] libavcodec/h263dec.c
  • [DBH] libavcodec/h264dec.c
  • [DBH] libavcodec/hevcdec.c
  • [DBH] libavcodec/hwaccel.h
  • [DBH] libavcodec/hwaccels.h
  • [DBH] libavcodec/mmaldec.c
  • [DBH] libavcodec/mpeg12dec.c
  • [DBH] libavcodec/mpeg4videodec.c
  • [DBH] libavcodec/qsvdec.c
  • [DBH] libavcodec/qsvdec.h
  • [DBH] libavcodec/qsvdec_h2645.c
  • [DBH] libavcodec/qsvdec_other.c
  • [DBH] libavcodec/vc1dec.c
  • [DBH] libavcodec/vp8.c

• lavc : Add codec metadata to indicate hardware support

  26 octobre 2017, par Mark Thompson

  lavc: Add codec metadata to indicate hardware support
  

  • [DBH] doc/APIchanges
  • [DBH] libavcodec/avcodec.h
  • [DBH] libavcodec/hwaccel.h
  • [DBH] libavcodec/utils.c
  • [DBH] libavcodec/version.h

• vaapi_h264 : Add workaround for bad SEI in old Intel drivers

  25 octobre 2017, par Mark Thompson

  vaapi_h264: Add workaround for bad SEI in old Intel drivers
  
  With pre-2.0 Intel drivers in CBR mode, if an explicit SEI message with
  the old (now deprecated) type is not included, the driver generates and
  inserts some timing SEI which is almost certainly invlaid.  Before
  7a4fac5e91789b73e07bd4ad20493cfde028df76 we always inserted our own SEI
  so this would not be visible, but since then it has been possible to
  disable that.  We would also like to avoid using the deprecated type,
  and using the new type, while working in old drivers, does not suppress
  the spurious message like the old type does.
  
  Therefore, suppress the bad SEI insertion by providing a zero-length
  buffer with the old type, which the driver can insert harmlessly.
  

  • [DBH] libavcodec/vaapi_encode_h264.c