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• avfilter/vf_signature : Avoid cast from function pointer to void*

  25 août 2020, par Andreas Rheinhardt

  avfilter/vf_signature : Avoid cast from function pointer to void*
  The signature filter uses qsort, but its compare function doesn't have
  
  the signature required of such a function ; therefore it casts the
  
  function pointer to void. Yet this is wrong :
  
  C90 only guarantees that one can convert a pointer to any incomplete
  
  type or object type to void* and back with the result comparing equal
  
  to the original which makes pointers to void generic pointers to
  
  incomplete or object type. Yet C90 lacks a generic function pointer
  
  type.
  
  C99 additionally guarantees that a pointer to a function of one type may
  
  be converted to a pointer to a function of another type with the result
  
  and the original comparing equal when converting back.
  
  This makes any function pointer type a generic function pointer type.
  
  Yet even this does not make pointers to void generic function pointers.
  Both GCC and Clang emit warnings for this when in pedantic mode.
  This commit fixes this by modifying the compare function to comply with
  
  the expected signature.
  Reviewed-by : Paul B Mahol <onemda@gmail.com>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavfilter/vf_signature.c

• ffprobe : avoid potentially lossy long long int -> double cast in value_string()

  13 septembre 2012, par Stefano Sabatini

  ffprobe : avoid potentially lossy long long int -> double cast in value_string()

• swscale/x86/swscale : Fix warning about loosing significant bits in cast

  10 mai 2015, par Michael Niedermayer

  swscale/x86/swscale : Fix warning about loosing significant bits in cast
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libswscale/x86/swscale.c