kc3-lang/libjpeg-turbo/simd/arm/jdmerge-neon.c

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• Hash : e69dd40c
  Author :
  Date : 2024-01-23T13:26:41
  

  Reorganize source to make things easier to find
  
  - Move all libjpeg documentation, except for README.ijg, into the doc/
    subdirectory.
  
  - Move the TurboJPEG C API documentation from doc/html/ into
    doc/turbojpeg/.
  
  - Move all C source code and headers into a src/ subdirectory.
  
  - Move turbojpeg-jni.c into the java/ subdirectory.
  
  Referring to #226, there is no ideal solution to this problem.  A
  semantically ideal solution would have involved placing all source code,
  including the SIMD and Java source code, under src/ (or perhaps placing
  C library source code under lib/ and C test program source code under
  test/), all header files under include/, and all documentation under
  doc/.  However:
  
  - To me it makes more sense to have separate top-level directories for
    each language, since the SIMD extensions and the Java API are
    technically optional features.  src/ now contains only the code that
    is relevant to the core C API libraries and associated programs.
  - I didn't want to bury the java/ and simd/ directories or add a level
    of depth to them, since both directories already contain source code
    that is 3-4 levels deep.
  - I would prefer not to separate the header files from the C source
    code, because:
    1. It would be disruptive.  libjpeg and libjpeg-turbo have
       historically placed C source code and headers in the same
       directory, and people who are familiar with both projects (self
       included) are used to looking for the headers in the same directory
       as the C source code.
    2. In terms of how the headers are used internally in libjpeg-turbo,
       the distinction between public and private headers is a bit fuzzy.
  - It didn't make sense to separate the test source code from the library
    source code, since there is not a clear distinction in some cases.
    (For instance, the IJG image I/O functions are used by cjpeg and djpeg
    as well as by the TurboJPEG API.)
  
  This solution is minimally disruptive, since it keeps all C source code
  and headers together and keeps java/ and simd/ as top-level directories.
  It is a bit awkward, because java/ and simd/ technically contain source
  code, even though they are not under src/.  However, other solutions
  would have been more awkward for different reasons.
  
  Closes #226
  

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• simd/arm/jdmerge-neon.c

• /*
   * jdmerge-neon.c - merged upsampling/color conversion (Arm Neon)
   *
   * Copyright (C) 2020, Arm Limited.  All Rights Reserved.
   * Copyright (C) 2024, 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.
   */
  
  #define JPEG_INTERNALS
  #include "../../src/jinclude.h"
  #include "../../src/jpeglib.h"
  #include "../../src/jsimd.h"
  #include "../../src/jdct.h"
  #include "../../src/jsimddct.h"
  #include "../jsimd.h"
  #include "align.h"
  
  #include <arm_neon.h>
  
  
  /* YCbCr -> RGB conversion constants */
  
  #define F_0_344  11277  /* 0.3441467 = 11277 * 2^-15 */
  #define F_0_714  23401  /* 0.7141418 = 23401 * 2^-15 */
  #define F_1_402  22971  /* 1.4020386 = 22971 * 2^-14 */
  #define F_1_772  29033  /* 1.7720337 = 29033 * 2^-14 */
  
  ALIGN(16) static const int16_t jsimd_ycc_rgb_convert_neon_consts[] = {
    -F_0_344, F_0_714, F_1_402, F_1_772
  };
  
  
  /* Include inline routines for colorspace extensions. */
  
  #include "jdmrgext-neon.c"
  #undef RGB_RED
  #undef RGB_GREEN
  #undef RGB_BLUE
  #undef RGB_PIXELSIZE
  
  #define RGB_RED  EXT_RGB_RED
  #define RGB_GREEN  EXT_RGB_GREEN
  #define RGB_BLUE  EXT_RGB_BLUE
  #define RGB_PIXELSIZE  EXT_RGB_PIXELSIZE
  #define jsimd_h2v1_merged_upsample_neon  jsimd_h2v1_extrgb_merged_upsample_neon
  #define jsimd_h2v2_merged_upsample_neon  jsimd_h2v2_extrgb_merged_upsample_neon
  #include "jdmrgext-neon.c"
  #undef RGB_RED
  #undef RGB_GREEN
  #undef RGB_BLUE
  #undef RGB_PIXELSIZE
  #undef jsimd_h2v1_merged_upsample_neon
  #undef jsimd_h2v2_merged_upsample_neon
  
  #define RGB_RED  EXT_RGBX_RED
  #define RGB_GREEN  EXT_RGBX_GREEN
  #define RGB_BLUE  EXT_RGBX_BLUE
  #define RGB_ALPHA  3
  #define RGB_PIXELSIZE  EXT_RGBX_PIXELSIZE
  #define jsimd_h2v1_merged_upsample_neon  jsimd_h2v1_extrgbx_merged_upsample_neon
  #define jsimd_h2v2_merged_upsample_neon  jsimd_h2v2_extrgbx_merged_upsample_neon
  #include "jdmrgext-neon.c"
  #undef RGB_RED
  #undef RGB_GREEN
  #undef RGB_BLUE
  #undef RGB_ALPHA
  #undef RGB_PIXELSIZE
  #undef jsimd_h2v1_merged_upsample_neon
  #undef jsimd_h2v2_merged_upsample_neon
  
  #define RGB_RED  EXT_BGR_RED
  #define RGB_GREEN  EXT_BGR_GREEN
  #define RGB_BLUE  EXT_BGR_BLUE
  #define RGB_PIXELSIZE  EXT_BGR_PIXELSIZE
  #define jsimd_h2v1_merged_upsample_neon  jsimd_h2v1_extbgr_merged_upsample_neon
  #define jsimd_h2v2_merged_upsample_neon  jsimd_h2v2_extbgr_merged_upsample_neon
  #include "jdmrgext-neon.c"
  #undef RGB_RED
  #undef RGB_GREEN
  #undef RGB_BLUE
  #undef RGB_PIXELSIZE
  #undef jsimd_h2v1_merged_upsample_neon
  #undef jsimd_h2v2_merged_upsample_neon
  
  #define RGB_RED  EXT_BGRX_RED
  #define RGB_GREEN  EXT_BGRX_GREEN
  #define RGB_BLUE  EXT_BGRX_BLUE
  #define RGB_ALPHA  3
  #define RGB_PIXELSIZE  EXT_BGRX_PIXELSIZE
  #define jsimd_h2v1_merged_upsample_neon  jsimd_h2v1_extbgrx_merged_upsample_neon
  #define jsimd_h2v2_merged_upsample_neon  jsimd_h2v2_extbgrx_merged_upsample_neon
  #include "jdmrgext-neon.c"
  #undef RGB_RED
  #undef RGB_GREEN
  #undef RGB_BLUE
  #undef RGB_ALPHA
  #undef RGB_PIXELSIZE
  #undef jsimd_h2v1_merged_upsample_neon
  #undef jsimd_h2v2_merged_upsample_neon
  
  #define RGB_RED  EXT_XBGR_RED
  #define RGB_GREEN  EXT_XBGR_GREEN
  #define RGB_BLUE  EXT_XBGR_BLUE
  #define RGB_ALPHA  0
  #define RGB_PIXELSIZE  EXT_XBGR_PIXELSIZE
  #define jsimd_h2v1_merged_upsample_neon  jsimd_h2v1_extxbgr_merged_upsample_neon
  #define jsimd_h2v2_merged_upsample_neon  jsimd_h2v2_extxbgr_merged_upsample_neon
  #include "jdmrgext-neon.c"
  #undef RGB_RED
  #undef RGB_GREEN
  #undef RGB_BLUE
  #undef RGB_ALPHA
  #undef RGB_PIXELSIZE
  #undef jsimd_h2v1_merged_upsample_neon
  #undef jsimd_h2v2_merged_upsample_neon
  
  #define RGB_RED  EXT_XRGB_RED
  #define RGB_GREEN  EXT_XRGB_GREEN
  #define RGB_BLUE  EXT_XRGB_BLUE
  #define RGB_ALPHA  0
  #define RGB_PIXELSIZE  EXT_XRGB_PIXELSIZE
  #define jsimd_h2v1_merged_upsample_neon  jsimd_h2v1_extxrgb_merged_upsample_neon
  #define jsimd_h2v2_merged_upsample_neon  jsimd_h2v2_extxrgb_merged_upsample_neon
  #include "jdmrgext-neon.c"
  #undef RGB_RED
  #undef RGB_GREEN
  #undef RGB_BLUE
  #undef RGB_ALPHA
  #undef RGB_PIXELSIZE
  #undef jsimd_h2v1_merged_upsample_neon
  

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