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• configure : Check for -no_weak_imports in ldflags on macOS

  6 mars 2017, par Luca Barbato

  configure: Check for -no_weak_imports in ldflags on macOS
  
  Recent versions of macOS provide more POSIX API (in particular,
  clock_gettime) than previous versions and recent Apple toolchains
  provide all that API, even when targeting older releases without
  said API. Disallow linking to functions which might not be available
  at runtime.
  
  To actually have an effect, either add
  --extra-cflags="-mmacosx-version-min=10.11" (or any other version
  prior to 10.12) or set MACOSX_DEPLOYMENT_TARGET=10.11 when running
  configure.
  
  As a workaround for libav versions without this fix, one can
  also add --extra-cflags="-mmacosx-version-min=10.11
  -Werror=partial-availability" while running configure.
  
  The -no_weak_imports flag is new in Xcode 8; in Xcode 7 it is not
  supported. This is not an issue since Xcode 7 only ships with the
  10.11 macOS SDK, which lacks clock_gettime.
  
  Bug-Id: 1033
  
  CC: libav-stable@libav.org
  Signed-off-by: Martin Storsjö <martin@martin.st>
  

  • [DBH] configure

• build : Fix logic of clock_gettime() check

  6 mars 2017, par Diego Biurrun

  build: Fix logic of clock_gettime() check
  
  We should only check for clock_gettime() if _POSIX_MONOTONIC_CLOCK is
  available and do a full link check for clock_gettime() in all cases.
  

  • [DBH] configure

• avcodec : clarify some decoding/encoding API details

  6 mars 2017, par wm4

  avcodec: clarify some decoding/encoding API details
  
  Make it clear that there is no timing-dependent behavior. In particular,
  there is no state in which both input and output are denied, and where
  you have to wait for a while yourself to make progress (apparently some
  hardware decoders like to do this).
  
  Avoid wording that makes references to time. It shouldn't be mistaken
  for some kind of asynchronous API (like POSIX read() can return EAGAIN
  if there is no new input yet). It's a state machine, so try to use
  appropriate terms.
  
  Signed-off-by: Diego Biurrun <diego@biurrun.de>
  

  • [DBH] libavcodec/avcodec.h

• hwcontext_qsv : Implement mapping frames to the child device type

  4 mars 2017, par Mark Thompson

  hwcontext_qsv: Implement mapping frames to the child device type
  

  • [DBH] libavutil/hwcontext_qsv.c

• hwcontext_qsv : Implement mapping frames from the child device type

  4 mars 2017, par Mark Thompson

  hwcontext_qsv: Implement mapping frames from the child device type
  
  Factorises out existing surface initialisation code to reuse.
  

  • [DBH] libavutil/hwcontext_qsv.c