/*
 * jdcolor-neon.c - colorspace conversion (Arm Neon)
 *
 * Copyright (C) 2020, Arm Limited.  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 "jconfigint.h"
#include "../../jinclude.h"
#include "../../jpeglib.h"
#include "../../jsimd.h"
#include "../../jdct.h"
#include "../../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 "jdcolext-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_ycc_rgb_convert_neon  jsimd_ycc_extrgb_convert_neon
#include "jdcolext-neon.c"
#undef RGB_RED
#undef RGB_GREEN
#undef RGB_BLUE
#undef RGB_PIXELSIZE
#undef jsimd_ycc_rgb_convert_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_ycc_rgb_convert_neon  jsimd_ycc_extrgbx_convert_neon
#include "jdcolext-neon.c"
#undef RGB_RED
#undef RGB_GREEN
#undef RGB_BLUE
#undef RGB_ALPHA
#undef RGB_PIXELSIZE
#undef jsimd_ycc_rgb_convert_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_ycc_rgb_convert_neon  jsimd_ycc_extbgr_convert_neon
#include "jdcolext-neon.c"
#undef RGB_RED
#undef RGB_GREEN
#undef RGB_BLUE
#undef RGB_PIXELSIZE
#undef jsimd_ycc_rgb_convert_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_ycc_rgb_convert_neon  jsimd_ycc_extbgrx_convert_neon
#include "jdcolext-neon.c"
#undef RGB_RED
#undef RGB_GREEN
#undef RGB_BLUE
#undef RGB_ALPHA
#undef RGB_PIXELSIZE
#undef jsimd_ycc_rgb_convert_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_ycc_rgb_convert_neon  jsimd_ycc_extxbgr_convert_neon
#include "jdcolext-neon.c"
#undef RGB_RED
#undef RGB_GREEN
#undef RGB_BLUE
#undef RGB_ALPHA
#undef RGB_PIXELSIZE
#undef jsimd_ycc_rgb_convert_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_ycc_rgb_convert_neon  jsimd_ycc_extxrgb_convert_neon
#include "jdcolext-neon.c"
#undef RGB_RED
#undef RGB_GREEN
#undef RGB_BLUE
#undef RGB_ALPHA
#undef RGB_PIXELSIZE
#undef jsimd_ycc_rgb_convert_neon

/* YCbCr -> RGB565 Conversion */

#define RGB_PIXELSIZE  2
#define jsimd_ycc_rgb_convert_neon  jsimd_ycc_rgb565_convert_neon
#include "jdcolext-neon.c"
#undef RGB_PIXELSIZE
#undef jsimd_ycc_rgb_convert_neon