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/*-----------------------------------------------------------------
LOG
GEM - Graphics Environment for Multimedia
GemPixConvertSIMD.h
- header-file for color conversion
- this is mainly for (SIMD-)optimized routines
- part of GEM
Copyright (c) 2006-2011 IOhannes m zmölnig. forum::für::umläute. IEM. zmoelnig@iem.at
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
-----------------------------------------------------------------*/
#ifndef _INCLUDE__GEM_GEM_PIXCONVERT_H_
#define _INCLUDE__GEM_GEM_PIXCONVERT_H_
#include "Gem/Image.h"
#include "Utils/SIMD.h"
// use formulae from http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html#RTFToC30
/*
* [Y] 1 [ 65.738 129.075 25.064 ] [R] [ 16]
* [U] = --- * [ -37.945 -74.494 112.439 ] * [G]+[128]
* [V] = 256 [ 112.439 -94.154 -18.285 ] [B] [128]
*
* [R] 1 [ 298.082 0.0 408.583 ] [Y] [ 16]
* [G] = --- * [ 298.082 -100.291 -208.120 ] * ([U]-[128])
* [B] = 256 [ 298.082 516.411 0.0 ] [V] [128]
*/
#define YUV_POYNTON
// here comes something to be afraid of:
// (probably it would be better to define the matrices as real constant-value matrices)
// (instead of element-wise)
#ifdef YUV_POYNTON
# define Y_OFFSET 16
# define UV_OFFSET 128
// RGB2YUV
// poynton-values rounded
# define RGB2YUV_11 66
# define RGB2YUV_12 129
# define RGB2YUV_13 25
# define RGB2YUV_21 -38
# define RGB2YUV_22 -74
# define RGB2YUV_23 112
# define RGB2YUV_31 112
# define RGB2YUV_32 -94
# define RGB2YUV_33 -18
// YUV2RGB
// (we skip _21 and _31 as they are equal to _11)
#if 0
// poynton-values rounded
# define YUV2RGB_11 298
# define YUV2RGB_12 0
# define YUV2RGB_13 409
# define YUV2RGB_22 -100
# define YUV2RGB_23 -208
# define YUV2RGB_32 516
# define YUV2RGB_33 0
#else
// this is round(256*inv(rgb2yuv/256))
// so the general error should be smaller
# define YUV2RGB_11 298
# define YUV2RGB_12 -1
# define YUV2RGB_13 409
# define YUV2RGB_22 -100
# define YUV2RGB_23 -210
# define YUV2RGB_32 519
# define YUV2RGB_33 0
#endif
#else
/* the old ones: */
# define Y_OFFSET 0
# define UV_OFFSET 128
// RGB2YUV
# define RGB2YUV_11 77
# define RGB2YUV_12 150
# define RGB2YUV_13 29
# define RGB2YUV_21 -43
# define RGB2YUV_22 -85
# define RGB2YUV_23 128
# define RGB2YUV_31 128
# define RGB2YUV_32 -107
# define RGB2YUV_33 -21
// YUV2RGB
# define YUV2RGB_11 256
# define YUV2RGB_12 0
# define YUV2RGB_13 359
# define YUV2RGB_22 -88
# define YUV2RGB_23 -183
# define YUV2RGB_32 454
# define YUV2RGB_33 0
#endif /* POYNTON */
#if 0
/* yuv-coefficients would also need an offset! */
# define RGB2GRAY_RED RGB2YUV_11
# define RGB2GRAY_GREEN RGB2YUV_12
# define RGB2GRAY_BLUE RGB2YUV_13
# define RGB2GRAY_OFFSET Y_OFFSET
#else
# define RGB2GRAY_RED 77
# define RGB2GRAY_GREEN 150
# define RGB2GRAY_BLUE 29
# define RGB2GRAY_OFFSET 0
#endif
/* AltiVec */
#ifdef __VEC__
/* there are problems on OSX10.3 with older versions of gcc, since the intrinsic code
* below freely changes between signed and unsigned short vectors
* newer versions of gcc accept this...
* LATER: fix the code (GemPixConvertAltivec:750..800)
*/
# ifdef __GNUC__
/* according to hcs it does NOT work with gcc-3.3
* for simplicity, i disable everything below gcc4
* JMZ: 20061114
*/
# if __GNUC__ < 4
# warning disabling AltiVec for older gcc: please fix me
# define NO_VECTORINT_TO_VECTORUNSIGNEDINT
# endif
# endif /* GNUC */
void RGB_to_YCbCr_altivec(const unsigned char *rgbdata, size_t RGB_size,
unsigned char *pixels);
void RGBA_to_YCbCr_altivec(const unsigned char *rgbadata, size_t RGBA_size,
unsigned char *pixels);
void BGR_to_YCbCr_altivec(const unsigned char *bgrdata, size_t BGR_size,
unsigned char *pixels);
void BGRA_to_YCbCr_altivec(const unsigned char *bgradata, size_t BGRA_size,
unsigned char *pixels);
void YUV422_to_BGRA_altivec(const unsigned char *yuvdata, size_t pixelnum,
unsigned char *pixels);
void YV12_to_YUV422_altivec(const short*Y, const short*U, const short*V,
unsigned char *data, int xsize, int ysize);
# ifndef NO_VECTORINT_TO_VECTORUNSIGNEDINT
void YUV422_to_YV12_altivec(short*pY, short*pY2, short*pU, short*pV,
const unsigned char *gem_image, int xsize, int ysize);
# endif
#endif /* AltiVec */
/* SSE2 */
#ifdef __SSE2__
void RGBA_to_UYVY_SSE2(const unsigned char *rgbadata,
size_t size,
unsigned char *yuvdata);
void UYVY_to_RGBA_SSE2(const unsigned char *yuvdata,
size_t size,
unsigned char *rgbadata);
void UYVY_to_RGB_SSE2(const unsigned char *yuvdata,
size_t size,
unsigned char *rgbadata);
#endif /* SSE2 */
/* in case somebody has an old machine... */
#ifdef __MMX__
#endif /* MMX */
#endif /* _INCLUDE__GEM_GEM_PIXCONVERT_H_ */
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