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/* See LICENSE file for copyright and license details. */
#include <math.h>
#define D65_XYY_X 0.312726871026564878786047074755
#define D65_XYY_Y 0.329023206641284038376227272238
#define D65_XYZ_X (D65_XYY_X / D65_XYY_Y)
#define D65_XYZ_Z (1 / D65_XYY_Y - 1 - D65_XYZ_X)
#define SRGB_ENCODE(TYPE, NAME_SUFFIX, MATH_SUFFIX)\
static inline TYPE\
srgb_encode##NAME_SUFFIX(TYPE t)\
{\
TYPE sign = 1;\
if (t < 0) {\
t = -t;\
sign = -1;\
}\
t = t <= (TYPE)0.0031306684425217108\
? (TYPE)12.92 * t\
: (TYPE)1.055 * pow##MATH_SUFFIX(t, (TYPE)1.0 / (TYPE)2.4) - (TYPE)0.055;\
return t * sign;\
}
SRGB_ENCODE(double, _d,)
SRGB_ENCODE(float, _f, f)
#undef SRGB_ENCODE
#define SRGB_DECODE(TYPE, NAME_SUFFIX, MATH_SUFFIX)\
static inline TYPE\
srgb_decode##NAME_SUFFIX(TYPE t)\
{\
TYPE sign = 1;\
if (t < 0) {\
t = -t;\
sign = -1;\
}\
t = t <= (TYPE)0.0031306684425217108 * (TYPE)12.92\
? t / (TYPE)12.92\
: pow##MATH_SUFFIX((t + (TYPE)0.055) / (TYPE)1.055, (TYPE)2.4);\
return t * sign;\
}
SRGB_DECODE(double, _d,)
SRGB_DECODE(float, _f, f)
#undef SRGB_DECODE
#define MATRIX_MULTIPLY_FUNCTION(FUNCTION, TYPE, R1C1, R1C2, R1C3, R2C1, R2C2, R2C3, R3C1, R3C2, R3C3)\
static inline void\
FUNCTION(TYPE ia, TYPE ib, TYPE ic, TYPE *oa, TYPE *ob, TYPE *oc)\
{\
*oa = (TYPE)(R1C1) * ia + (TYPE)(R1C2) * ib + (TYPE)(R1C3) * ic;\
*ob = (TYPE)(R2C1) * ia + (TYPE)(R2C2) * ib + (TYPE)(R2C3) * ic;\
*oc = (TYPE)(R3C1) * ia + (TYPE)(R3C2) * ib + (TYPE)(R3C3) * ic;\
}
#define MATRIX_MULTIPLY_FUNCTIONS(FUNCTION_BASE, ...)\
MATRIX_MULTIPLY_FUNCTION(FUNCTION_BASE##_d, double, __VA_ARGS__)\
MATRIX_MULTIPLY_FUNCTION(FUNCTION_BASE##_f, float, __VA_ARGS__)
MATRIX_MULTIPLY_FUNCTIONS(yuv_to_srgb,
1,
0.00028328010485821202317155420580263580632163211703,
1.14070449590558520291949662350816652178764343261719,
1,
-0.39630886669497211727275498560629785060882568359375,
-0.58107364288228224857846271333983168005943298339844,
1,
2.03990003507541306504435851820744574069976806640625,
0.00017179031692307700847528739718228507626918144524)
MATRIX_MULTIPLY_FUNCTIONS(srgb_to_yuv,
0.299, 0.587, 0.114,
-0.14662756598240470062854967636667424812912940979004,
-0.28771586836102963635752871596196200698614120483398,
0.43434343434343436474165400795754976570606231689453,
0.61456892577224520035628074765554629266262054443359,
-0.51452282157676354490405401520547457039356231689453,
-0.10004610419548178035231700278018251992762088775635)
MATRIX_MULTIPLY_FUNCTIONS(ciexyz_to_srgb,
3.240446254647737500675930277794,
-1.537134761820080575134284117667,
-0.498530193022728718155178739835,
-0.969266606244679751469561779231,
1.876011959788370209167851498933,
0.041556042214430065351304932619,
0.055643503564352832235773149705,
-0.204026179735960239147729566866,
1.057226567722703292062647051353)
MATRIX_MULTIPLY_FUNCTIONS(srgb_to_ciexyz,
0.412457445582367576708548995157,
0.357575865245515878143578447634,
0.180437247826399665973085006954,
0.212673370378408277403536885686,
0.715151730491031756287156895269,
0.072174899130559869164791564344,
0.019333942761673460208893260415,
0.119191955081838593666354597644,
0.950302838552371742508739771438)
MATRIX_MULTIPLY_FUNCTIONS(scaled_yuv_to_ciexyz,
0.00001450325106667098632156481796684488472237717360,
0.00000345586790639342739093228633329157872822179343,
0.00000400923398630552893485111398685916128670214675,
0.00001525902189669641837040624243737596543724066578,
-0.00000207722814409390653614547427030512238843584782,
-0.00000263898607692305410302407824019166326934282552,
0.00001661446153041708825425643025752719950105529279,
0.00002885925752619118069149627137104374696718878113,
-0.00000071781086875769179526501342566979779746816348)
MATRIX_MULTIPLY_FUNCTIONS(ciexyz_to_scaled_yuv,
26625.38231027395886485464870929718017578125,
40524.0090949436053051613271236419677734375,
-271.5313105642117079696618020534515380859375,
-11278.3751445417292416095733642578125,
-26409.91773157499847002327442169189453125,
34100.5706543184860493056476116180419921875,
162829.60100012840121053159236907958984375,
-123829.313212639070115983486175537109375,
-28411.65702312920984695665538311004638671875)
#undef MATRIX_MULTIPLY_FUNCTIONS
#undef MATRIX_MULTIPLY_FUNCTION
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