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/*
* $Id: make_RGB_to_YCbCr_table.c,v 1.3 2010/02/05 23:50:23 simakov Exp $
*
* EPSILON - wavelet image compression library.
* Copyright (C) 2006,2007,2010 Alexander Simakov, <xander@entropyware.info>
*
* This file is part of EPSILON
*
* EPSILON is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* EPSILON 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with EPSILON. If not, see <http://www.gnu.org/licenses/>.
*
* http://epsilon-project.sourceforge.net
*/
#include <stdio.h>
#define ALIGN_MASK 0x07
int number_of_bits(int value)
{
int bits = 0;
while (value > 0) {
value >>= 1;
bits++;
}
return bits;
}
void make_RGB_to_YCbCr_table(double factor, char *name)
{
int i;
printf("local double %s[256] = {\n", name);
for (i = 0; i < 256; i++) {
double value = factor * i;
if ((i & ALIGN_MASK) == 0) {
printf(" ");
}
printf("%8g,%s", value, (i & ALIGN_MASK) == ALIGN_MASK ? "" : " ");
if ((i & ALIGN_MASK) == ALIGN_MASK) {
printf("\n");
}
}
printf("};\n\n");
}
int main(int argc, char **argv)
{
double factors[] = {
0.299000, 0.587000, 0.114000, 0.168736,
0.331264, 0.500000, 0.418688, 0.081312,
};
char *names[] = {
"O_299000", "O_587000", "O_114000", "O_168736",
"O_331264", "O_500000", "O_418688", "O_081312",
};
int length = sizeof(factors) / sizeof(factors[0]);
int i;
for (i = 0; i < length; i++) {
make_RGB_to_YCbCr_table(factors[i], names[i]);
}
return 0;
}
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