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• Revision 3c5256d572 : VP9_LPF_VERTICAL_16_DUAL_SSE2 optimization The vp9_lpf_vertical_16_dual functio

  29 avril 2015, par levytamar82

  Changed Paths :
   Modify /vp9/common/x86/vp9_loopfilter_intrin_sse2.c

  
  
  VP9_LPF_VERTICAL_16_DUAL_SSE2 optimization

  The vp9_lpf_vertical_16_dual function optimized for x86 32bit target. The hot
  code in that function was caused by the call to the transpose8x16.
  The gcc generated assembly created uneeded fills and spills to the stack. By
  interleaving 2 loads and unpack instructions, in addition to hoisting the
  consumer
  instruction closer to the producer instructions, we eliminated most of the fills
  and spills and improve the function-level performance by 17%.
  credit for writing the function as well as finding the root cause goes to Erik
  Niemeyer (erik.a.niemeyer@intel.com)

  Change-Id : I6173cf53956d52918a047d1c53d9a673f952ec46

• Evolution #4256 : Faire un signalement des mise à jour de sécu

  11 janvier 2019

  Si on pouvait éviter de coder un truc spécifique encore, ça serait bien :)

  Mais sinon, composer.json n’a aucun numéro de version pour le paquet lui-même (à part pour la déclaration des dépendances). C’est le gestionnaire de version qui les gère (les tags en Git par exemple). https://github.com/drush-ops/drush/issues/2947 indique chez Drush https://github.com/drush-ops/drush/pull/3087 qui se base sur un fichier .json de déclaration (pour vérifier des paquets composer). En l’occurrence https://raw.githubusercontent.com/drupal-composer/drupal-security-advisories/8.x/composer.json

• How to add a dependency for a package ?

  25 septembre 2021, par Meh.

  I just built and installed FFmpeg (./configure --disable-asm).
  
And I need to use libavformat in my C++ project.

  


  I use FindFFmpeg.cmake, and when I build, I get a bunch of undefined symbol errors so I have to find libraries :

  


      find_package(FFmpeg COMPONENTS avcodec avformat avutil swresample swscale)
    find_library(COREMEDIA_LIBRARY CoreMedia)
    find_library(VIDEOTOOLBOX_LIBRARY VideoToolbox)
    find_library(COREVIDEO_LIBRARY CoreVideo)
    find_library(AUDIOTOOLBOX_LIBRARY AudioToolbox)
    find_library(SECURITY_LIBRARY Security)

## In another file:

  target_link_libraries(videocommon PRIVATE
    FFmpeg::avcodec
    FFmpeg::avformat
    FFmpeg::avutil
    FFmpeg::swscale
    FFmpeg::swresample
    ${COREMEDIA_LIBRARY}
    ${VIDEOTOOLBOX_LIBRARY}
    ${COREVIDEO_LIBRARY}
    ${AUDIOTOOLBOX_LIBRARY}
    ${SECURITY_LIBRARY}
  )



  


  However, I still get errors from libavformat.a(tls_securetransport.o) :

  


    "_SSLRead", referenced from:
      _tls_read in libavformat.a(tls_securetransport.o)
  "_SSLCreateContext", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetCertificate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetIOFuncs", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetSessionOption", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetPeerDomainName", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SecIdentityCreate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SecTrustEvaluate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SecTrustSetAnchorCertificates", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLClose", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
      _tls_close in libavformat.a(tls_securetransport.o)
  "_SSLHandshake", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetConnection", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLCopyPeerTrust", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)


  


  This is the #include part from the file in question tls_securetransport.c :

  


  #include &#xA;&#xA;#include "avformat.h"&#xA;#include "avio_internal.h"&#xA;#include "internal.h"&#xA;#include "network.h"&#xA;#include "os_support.h"&#xA;#include "url.h"&#xA;#include "tls.h"&#xA;#include "libavcodec/internal.h"&#xA;#include "libavutil/avstring.h"&#xA;#include "libavutil/opt.h"&#xA;#include "libavutil/parseutils.h"&#xA;&#xA;#include <security></security>Security.h>&#xA;#include <security></security>SecureTransport.h>&#xA;#include <corefoundation></corefoundation>CoreFoundation.h>&#xA;

  


  Why is this happening ?

  


  I also get the same result if I were to build with OpenSSL or LibreSSL. What is causing the problem ? My project or incorrectly building FFmpeg ?

  


  If I were to use LibreSSL :

  


  #cmakelists.txt:
find_package(LibreSSL)

#linker
  target_link_libraries(videocommon PRIVATE
    FFmpeg::avcodec
    FFmpeg::avformat
    FFmpeg::avutil
    FFmpeg::swscale
    FFmpeg::swresample
    ${LIBRESSL_LIBRARIES} 
    ${COREMEDIA_LIBRARY}
    ${VIDEOTOOLBOX_LIBRARY}
    ${COREVIDEO_LIBRARY}
    ${AUDIOTOOLBOX_LIBRARY}
  )

#full error
Undefined symbols for architecture x86_64:
  "_tls_config_error", referenced from:
      _ff_tls_open in libavformat.a(tls_libtls.o)
  "_tls_config_insecure_noverifytime", referenced from:
      _ff_tls_open in libavformat.a(tls_libtls.o)
  "_tls_accept_cbs", referenced from:
      _ff_tls_open in libavformat.a(tls_libtls.o)
  "_tls_connect_cbs", referenced from:
      _ff_tls_open in libavformat.a(tls_libtls.o)