Changes between Version 12 and Version 13 of SponsoringPrograms/GSoC/2016


Ignore:
Timestamp:
Feb 13, 2016, 12:49:43 AM (3 years ago)
Author:
michael
Comment:

move postproc to unmentored projects

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  • SponsoringPrograms/GSoC/2016

    v12 v13  
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    89 == Postproc optimizations ==
    90 
    91 [[Image(wiki:SponsoringPrograms/GSoC/2014:PostProc.jpg, 240, right, nolink)]]
    92 
    93 
    94 '''Description:''' FFmpeg contains libpostproc, which is used to postprocess 8x8 DCT-MC based video and images (jpeg, mpeg-1/2/4, H.263 among others). Postprocessing removes blocking (and other) artifacts from low bitrate / low quality images and videos. The code though has been written a long time ago and its SIMD optimizations need to be updated to what modern CPUs support (AVX2 and SSE2+).
    95 
    96 '''Expected results:'''
    97     - Convert all gcc inline asm in libpostproc to YASM.
    98     - Restructure the code so that it works with block sizes compatible with modern SIMD.
    99     - Add Integer SSE2 and AVX2 optimizations for each existing MMX/MMX2/3dnow optimization in libpostproc.
    100 
    101 '''Prerequisites:''' C coding skills, good x86 assembly coding skills, basic familiarity with git.
    102 
    103 '''Qualification Task:''' convert 1 or 2 MMX2 functions to SSE2 and AVX2.
    104 
    105 '''Mentor:''' Michael Niedermayer (''michaelni'' in #ffmpeg-devel on Freenode IRC, michaelni@gmx.at)
    106 
    107 '''Backup Mentor:'''
    108 
    109 
    11089== MPEG-4 Audio Lossless Coding (ALS) encoder ==
    11190
     
    321300'''Backup Mentor:''' TBA, possibly Nicolas George (''Cigaes'' in #ffmpeg-devel on Freenode IRC)
    322301
     302
     303== Postproc optimizations ==
     304
     305[[Image(wiki:SponsoringPrograms/GSoC/2014:PostProc.jpg, 240, right, nolink)]]
     306
     307
     308'''Description:''' FFmpeg contains libpostproc, which is used to postprocess 8x8 DCT-MC based video and images (jpeg, mpeg-1/2/4, H.263 among others). Postprocessing removes blocking (and other) artifacts from low bitrate / low quality images and videos. The code though has been written a long time ago and its SIMD optimizations need to be updated to what modern CPUs support (AVX2 and SSE2+).
     309
     310'''Expected results:'''
     311    - Convert all gcc inline asm in libpostproc to YASM.
     312    - Restructure the code so that it works with block sizes compatible with modern SIMD.
     313    - Add Integer SSE2 and AVX2 optimizations for each existing MMX/MMX2/3dnow optimization in libpostproc.
     314
     315'''Prerequisites:''' C coding skills, good x86 assembly coding skills, basic familiarity with git.
     316
     317'''Qualification Task:''' convert 1 or 2 MMX2 functions to SSE2 and AVX2.
     318
     319'''Mentor:'''
     320
     321'''Backup Mentor:'''
     322
     323
    323324----
    324325