color.h

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/****************************************************************************
#               GspcaGui:  Gspca/Spca5xx Grabber                            #
#               Copyright (C) 2004 2005 2006 Michel Xhaard                  #
#                                                                           #
# This program is free software; you can redistribute it and/or modify      #
# it under the terms of the GNU General Public License as published by      #
# the Free Software Foundation; either version 2 of the License, or         #
# (at your option) any later version.                                       #
#                                                                           #
# This program is distributed in the hope that it will be useful,           #
# but WITHOUT ANY WARRANTY; without even the implied warranty of            #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             #
# GNU General Public License for more details.                              #
#                                                                           #
# You should have received a copy of the GNU General Public License         #
# along with this program; if not, write to the Free Software               #
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA #
#                                                                           #
****************************************************************************/ 
typedef struct Myrgb16 {
        unsigned short blue:5;
        unsigned short green:6;
        unsigned short red:5;
} Myrgb16;
typedef struct Myrgb24 {
        unsigned char blue;
        unsigned char green;
        unsigned char red;
} Myrgb24;
typedef struct Myrgb32 {
        unsigned char blue;
        unsigned char green;
        unsigned char red;
        unsigned char alpha;
} Myrgb32;

typedef struct MyYUV422 {
        unsigned char y0;
        unsigned char u;
        unsigned char y1;
        unsigned char v;
} MyYUV422;

typedef struct MyYUV444 {
        unsigned char y;
        unsigned char u;
        unsigned char v;
} MyYUV444;

#define CLIP(color) (unsigned char)(((color)>0xFF)?0xff:(((color)<0)?0:(color)))

unsigned char
RGB24_TO_Y(unsigned char r, unsigned char g, unsigned char b);

unsigned char
YR_TO_V(unsigned char r, unsigned char y);

unsigned char
YB_TO_U(unsigned char b, unsigned char y);

unsigned char
R_FROMYV(unsigned char y, unsigned char v);

unsigned char
G_FROMYUV(unsigned char y, unsigned char u, unsigned char v);

unsigned char
B_FROMYU(unsigned char y, unsigned char u);

#define YfromRGB(r,g,b) CLIP((77*(r)+150*(g)+29*(b))>>8)
#define UfromRGB(r,g,b) CLIP(((128*(b)-85*(g)-43*(r))>>8 )+128)
#define VfromRGB(r,g,b) CLIP(((128*(r)-107*(g)-21*(b))>>8) +128)

#define PACKRGB16(r,g,b) (__u16) ((((b) & 0xF8) << 8 ) | (((g) & 0xFC) << 3 ) | (((r) & 0xF8) >> 3 ))
#define UNPACK16(pixel,r,g,b) r=((pixel)&0xf800) >> 8;  g=((pixel)&0x07e0) >> 3; b=(((pixel)&0x001f) << 3)

void initLut(void);
void freeLut(void);