kc3-lang/libjpeg-turbo/simd/jdcolor-altivec.c

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• Hash : ac4daa77
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  Date : 2015-01-10T22:56:26
  

  AltiVec SIMD implementation of YCC-to-RGB color conversion
  
  
  git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1489 632fc199-4ca6-4c93-a231-07263d6284db
  

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• simd/jdcolor-altivec.c

• /*
   * AltiVec optimizations for libjpeg-turbo
   *
   * Copyright (C) 2015, D. R. Commander.
   * All rights reserved.
   * This software is provided 'as-is', without any express or implied
   * warranty.  In no event will the authors be held liable for any damages
   * arising from the use of this software.
   *
   * Permission is granted to anyone to use this software for any purpose,
   * including commercial applications, and to alter it and redistribute it
   * freely, subject to the following restrictions:
   *
   * 1. The origin of this software must not be misrepresented; you must not
   *    claim that you wrote the original software. If you use this software
   *    in a product, an acknowledgment in the product documentation would be
   *    appreciated but is not required.
   * 2. Altered source versions must be plainly marked as such, and must not be
   *    misrepresented as being the original software.
   * 3. This notice may not be removed or altered from any source distribution.
   */
  
  /* YCC --> RGB CONVERSION */
  
  #include "jsimd_altivec.h"
  
  
  #define F_0_344 22554              /* FIX(0.34414) */
  #define F_0_714 46802              /* FIX(0.71414) */
  #define F_1_402 91881              /* FIX(1.40200) */
  #define F_1_772 116130             /* FIX(1.77200) */
  #define F_0_402 (F_1_402 - 65536)  /* FIX(1.40200) - FIX(1) */
  #define F_0_285 (65536 - F_0_714)  /* FIX(1) - FIX(0.71414) */
  #define F_0_228 (131072 - F_1_772) /* FIX(2) - FIX(1.77200) */
  
  #define SCALEBITS 16
  #define ONE_HALF (1 << (SCALEBITS - 1))
  
  #define RGB_INDEX0 {0,1,8,2,3,10,4,5,12,6,7,14,16,17,24,18}
  #define RGB_INDEX1 {3,10,4,5,12,6,7,14,16,17,24,18,19,26,20,21}
  #define RGB_INDEX2 {12,6,7,14,16,17,24,18,19,26,20,21,28,22,23,30}
  #include "jdcolext-altivec.c"
  #undef RGB_PIXELSIZE
  
  #define RGB_PIXELSIZE EXT_RGB_PIXELSIZE
  #define jsimd_ycc_rgb_convert_altivec jsimd_ycc_extrgb_convert_altivec
  #include "jdcolext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGB_INDEX0
  #undef RGB_INDEX1
  #undef RGB_INDEX2
  #undef jsimd_ycc_rgb_convert_altivec
  
  #define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE
  #define RGB_INDEX {0,1,8,9,2,3,10,11,4,5,12,13,6,7,14,15}
  #define jsimd_ycc_rgb_convert_altivec jsimd_ycc_extrgbx_convert_altivec
  #include "jdcolext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGB_INDEX
  #undef jsimd_ycc_rgb_convert_altivec
  
  #define RGB_PIXELSIZE EXT_BGR_PIXELSIZE
  #define RGB_INDEX0 {8,1,0,10,3,2,12,5,4,14,7,6,24,17,16,26}
  #define RGB_INDEX1 {3,2,12,5,4,14,7,6,24,17,16,26,19,18,28,21}
  #define RGB_INDEX2 {4,14,7,6,24,17,16,26,19,18,28,21,20,30,23,22}
  #define jsimd_ycc_rgb_convert_altivec jsimd_ycc_extbgr_convert_altivec
  #include "jdcolext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGB_INDEX0
  #undef RGB_INDEX1
  #undef RGB_INDEX2
  #undef jsimd_ycc_rgb_convert_altivec
  
  #define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE
  #define RGB_INDEX {8,1,0,9,10,3,2,11,12,5,4,13,14,7,6,15}
  #define jsimd_ycc_rgb_convert_altivec jsimd_ycc_extbgrx_convert_altivec
  #include "jdcolext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGB_INDEX
  #undef jsimd_ycc_rgb_convert_altivec
  
  #define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE
  #define RGB_INDEX {9,8,1,0,11,10,3,2,13,12,5,4,15,14,7,6}
  #define jsimd_ycc_rgb_convert_altivec jsimd_ycc_extxbgr_convert_altivec
  #include "jdcolext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGB_INDEX
  #undef jsimd_ycc_rgb_convert_altivec
  
  #define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE
  #define RGB_INDEX {9,0,1,8,11,2,3,10,13,4,5,12,15,6,7,14}
  #define jsimd_ycc_rgb_convert_altivec jsimd_ycc_extxrgb_convert_altivec
  #include "jdcolext-altivec.c"
  #undef RGB_PIXELSIZE
  #undef RGB_INDEX
  #undef jsimd_ycc_rgb_convert_altivec
  

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