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  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

  • Sélection de projets utilisant MediaSPIP

    29 avril 2011, par

    Les exemples cités ci-dessous sont des éléments représentatifs d’usages spécifiques de MediaSPIP pour certains projets.
    Vous pensez avoir un site "remarquable" réalisé avec MediaSPIP ? Faites le nous savoir ici.
    Ferme MediaSPIP @ Infini
    L’Association Infini développe des activités d’accueil, de point d’accès internet, de formation, de conduite de projets innovants dans le domaine des Technologies de l’Information et de la Communication, et l’hébergement de sites. Elle joue en la matière un rôle unique (...)

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  • aacenc_ltp : adjust and speed up autocorrelation calculations

    17 octobre 2015, par Rostislav Pehlivanov
    aacenc_ltp : adjust and speed up autocorrelation calculations

    There were some errors in the calculation as well as an entire
    
unnecessary loop to find the gain coefficient. Merge the
    
two loops.
    
Thanks to @ubitux for the suggestions and testing.
    • [DH] libavcodec/aacenc_ltp.c
    • [DH] tests/fate/aac.mak

  • Revision 53ff43adc3 : Prunes out full-rd computation based on modeled rd Adds a speed feature to elim

    9 juillet 2013, par Deb Mukherjee

    Changed Paths :
     Modify /vp9/common/vp9_blockd.h


     Modify /vp9/encoder/vp9_onyx_if.c


     Modify /vp9/encoder/vp9_onyx_int.h


     Modify /vp9/encoder/vp9_rdopt.c



    Prunes out full-rd computation based on modeled rd

    Adds a speed feature to eliminate full-rd computation if the modeled
    rd or rd based on a different parameter in the same mode is already
    a lot larger than the best rd yet.

    Specifically, only search the sharp and smooth filters if the modeled
    rd cost based on the regular filter is within a certain factor of the
    best rd cost so far. Also, skip full-rd computation of non splitmv
    inter modes if the modeled rd cost based on pred error is within the
    same factor of the best rd cost so far.

    Also adds some enhancements in the rd search for splitmv mode to
    speed things up by early breakouts. Negligible impact on performance.

    Resuts on derfraw300 :
    psnr : -0.013% with the splitmv enhancements, -0.24% with the rd
    breakout feature on.
    speedup : 6% with splitmv enhancements, 20% with also residual breakout
    (tested on football sequence at 600 Kbps)

    Change-Id : I37abc308ea9f110c1679ce649b6a7e73ab1ad5fc

  • avcodec/xbmdec : get_nibble() minor speed increase, and binary reduction

    1er février 2021, par Jose Da Silva
    avcodec/xbmdec : get_nibble() minor speed increase, and binary reduction

    Replace av_isxdigit(*ptr) and convert(*ptr) with get_nibble(*ptr) which
    
returns a valid nibble==0x00..0x0f or false==255 for all other values.
    
This way we only need to work with *ptr once instead of twice.
    

    Removing inline av_isxdigit(x) functions also shrinks executable size.
    

    Signed-off-by : Joe Da Silva <digital@joescat.com>
    • [DH] libavcodec/xbmdec.c

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