kc3-lang/libjpeg-turbo/jversion.h

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• Hash : f3a8684c
  Author :
  Date : 2016-01-07T00:19:43
  

  SSE2 SIMD implementation of Huffman encoding
  
  Full-color compression speedups relative to libjpeg-turbo 1.4.2:
  
  2.8 GHz Intel Xeon W3530, Linux, 64-bit:  2.2-18% (avg. 9.5%)
  2.8 GHz Intel Xeon W3530, Linux, 32-bit:  10-25% (avg. 17%)
  
  2.3 GHz AMD A10-4600M APU, Linux, 64-bit:  4.9-17% (avg. 11%)
  2.3 GHz AMD A10-4600M APU, Linux, 32-bit:  8.8-19% (avg. 15%)
  
  3.0 GHz Intel Core i7, OS X, 64-bit:  3.5-16% (avg. 10%)
  3.0 GHz Intel Core i7, OS X, 32-bit:  4.8-14% (avg. 11%)
  
  2.6 GHz AMD Athlon 64 X2 5050e:
  Performance-neutral (give or take a few percent)
  
  Full-color compression speedups relative to IPP:
  
  2.8 GHz Intel Xeon W3530, Linux, 64-bit:  4.8-34% (avg. 19%)
  2.8 GHz Intel Xeon W3530, Linux, 32-bit:  -19%-7.0% (avg. -7.0%)
  
  Refer to #42 for discussion.  Numerous other approaches were attempted,
  but this one proved to be the most performant across all platforms.
  
  This commit also fixes #3 (works around, really-- the clang-compiled version
  of jchuff.c still performs 20% worse than its GCC-compiled counterpart, but
  that code is now bypassed by the new SSE2 Huffman algorithm.)
  
  Based on:
  https://github.com/mayeut/libjpeg-turbo/commit/2cb4d41330e1edc4469f6b97ba73b73abfbeb02f
  https://github.com/mayeut/libjpeg-turbo/commit/36c94e050d117912adbff9fbcc6fe307df240168
  

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• jversion.h

• /*
   * jversion.h
   *
   * This file was part of the Independent JPEG Group's software:
   * Copyright (C) 1991-2012, Thomas G. Lane, Guido Vollbeding.
   * libjpeg-turbo Modifications:
   * Copyright (C) 2010, 2012-2016, D. R. Commander.
   * For conditions of distribution and use, see the accompanying README.ijg
   * file.
   *
   * This file contains software version identification.
   */
  
  
  #if JPEG_LIB_VERSION >= 80
  
  #define JVERSION        "8d  15-Jan-2012"
  
  #elif JPEG_LIB_VERSION >= 70
  
  #define JVERSION        "7  27-Jun-2009"
  
  #else
  
  #define JVERSION        "6b  27-Mar-1998"
  
  #endif
  
  #define JCOPYRIGHT      "Copyright (C) 1991-2012 Thomas G. Lane, Guido Vollbeding\n" \
                          "Copyright (C) 1999-2006 MIYASAKA Masaru\n" \
                          "Copyright (C) 2009 Pierre Ossman for Cendio AB\n" \
                          "Copyright (C) 2009-2016 D. R. Commander\n" \
                          "Copyright (C) 2009-2011 Nokia Corporation and/or its subsidiary(-ies)\n" \
                          "Copyright (C) 2013-2014 MIPS Technologies, Inc.\n" \
                          "Copyright (C) 2013 Linaro Limited\n" \
                          "Copyright (C) 2015 Matthieu Darbois"
  
  #define JCOPYRIGHT_SHORT "Copyright (C) 1991-2016 The libjpeg-turbo Project and many others"
  

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