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Autres articles (41)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

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  • libswscale/aarch64 : add another hscale specialization

    13 août 2022, par Swinney, Jonathan
    libswscale/aarch64 : add another hscale specialization

    This specialization handles the case where filtersize is 4 mod 8, e.g.
    
12, 20, etc. Aarch64 was previously using the c function for this case.
    
This implementation speeds up that case significantly.
    

    hscale_8_to_15__fs_12_dstW_512_c : 6234.1
    
hscale_8_to_15__fs_12_dstW_512_neon : 1505.6
    

    Signed-off-by : Jonathan Swinney <jswinney@amazon.com>
    
Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DH] libswscale/aarch64/hscale.S
    • [DH] libswscale/aarch64/swscale.c

  • swscale/aarch64 : add vscale specializations

    13 août 2022, par Swinney, Jonathan
    swscale/aarch64 : add vscale specializations

    This commit adds new code paths for vscale when filterSize is 2, 4, or
    
8. By using specialized code with unrolling to match the filterSize we
    
can improve performance.
    

    On AWS c7g (Graviton 3, Neoverse V1) instances :
    
                                 before   after
    
yuv2yuvX_2_0_512_accurate_neon :  558.8    268.9
    
yuv2yuvX_4_0_512_accurate_neon :  637.5    434.9
    
yuv2yuvX_8_0_512_accurate_neon :  1144.8   806.2
    
yuv2yuvX_16_0_512_accurate_neon : 2080.5   1853.7
    

    Signed-off-by : Jonathan Swinney <jswinney@amazon.com>
    
Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DH] libswscale/aarch64/output.S
    • [DH] libswscale/aarch64/swscale.c

  • swscale/aarch64 : vscale optimization

    13 août 2022, par Swinney, Jonathan
    swscale/aarch64 : vscale optimization

    Use scalar times vector multiply accumlate instructions instead of
    
vector times vector to remove the need for replicating load instructions
    
which are slightly slower.
    

    On AWS c7g (Graviton 3, Neoverse V1) instances :
    
yuv2yuvX_8_0_512_accurate_neon :  1144.8  987.4
    
yuv2yuvX_16_0_512_accurate_neon : 2080.5 1869.4
    

    Signed-off-by : Jonathan Swinney <jswinney@amazon.com>
    
Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DH] libswscale/aarch64/output.S

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