#include "config.h"
#include <glib.h>
#include <math.h>
#include "gstcms.h"
#define SCALE 256
static void
get_taps (double *taps, double x)
{
taps[3] = x * x * (x - 1);
taps[2] = x * (-x * x + x + 1);
x = 1 - x;
taps[1] = x * (-x * x + x + 1);
taps[0] = x * x * (x - 1);
}
int
main (int argc, char *argv[])
{
int i;
g_print ("/* This file is autogenerated. Do not edit.*/\n");
g_print ("#include <glib.h>\n");
g_print ("gint8 cog_resample_table_4tap[256][4] = {\n");
for (i = 0; i < 256; i++) {
double x = i / 256.0;
double taps[4];
int t[4];
int sum;
get_taps (taps, x);
taps[0] *= SCALE;
taps[1] *= SCALE;
taps[2] *= SCALE;
taps[3] *= SCALE;
t[0] = floor (taps[0]);
t[1] = floor (taps[1]);
t[2] = floor (taps[2]);
t[3] = floor (taps[3]);
sum = t[0] + t[1] + t[2] + t[3];
for (; sum < SCALE; sum++) {
int i;
double max = 0;
int max_i = -1;
for (i = 0; i < 4; i++) {
if (max_i == -1 || (t[i] < taps[i] && (taps[i] - t[i]) > max)) {
max_i = i;
max = taps[i] - t[i];
}
}
t[max_i]++;
}
sum = t[0] + t[1] + t[2] + t[3];
g_print (" { %d, %d, %d, %d }, /* %d %d */\n",
t[0], t[1], t[2], t[3], t[2] + t[0], t[1] + t[3]);
#if 0
g_print ("/* %.3f %.3f %.3f %.3f %d */\n",
taps[0] - t[0], taps[1] - t[1], taps[2] - t[2], taps[3] - t[3], sum);
#endif
}
g_print ("};\n");
g_print ("\n");
{
int cm, bits;
for (cm = 0; cm < 2; cm++) {
for (bits = 6; bits <= 8; bits += 2) {
ColorMatrix matrix;
/*
* At this point, everything is in YCbCr
* All components are in the range [0,255]
*/
color_matrix_set_identity (&matrix);
/* offset required to get input video black to (0.,0.,0.) */
/* we don't do this because the code does it for us */
color_matrix_offset_components (&matrix, -16, -128, -128);
color_matrix_scale_components (&matrix, (1 / 219.0), (1 / 224.0),
(1 / 224.0));
/* colour matrix, YCbCr -> RGB */
/* Requires Y in [0,1.0], Cb&Cr in [-0.5,0.5] */
if (cm) {
color_matrix_YCbCr_to_RGB (&matrix, 0.2126, 0.0722); /* HD */
} else {
color_matrix_YCbCr_to_RGB (&matrix, 0.2990, 0.1140); /* SD */
}
/*
* We are now in RGB space
*/
/* scale to output range. */
color_matrix_scale_components (&matrix, 255.0, 255.0, 255.0);
/* because we're doing 8-bit matrix coefficients */
color_matrix_scale_components (&matrix, 1 << bits, 1 << bits,
1 << bits);
g_print ("static const int cog_ycbcr_to_rgb_matrix_%dbit_%s[] = {\n",
bits, cm ? "hdtv" : "sdtv");
g_print (" %d, %d, %d, %d,\n",
(int) rint (matrix.m[0][0]),
(int) rint (matrix.m[0][1]),
(int) rint (matrix.m[0][2]), (int) rint (matrix.m[0][3]));
g_print (" %d, %d, %d, %d,\n",
(int) rint (matrix.m[1][0]),
(int) rint (matrix.m[1][1]),
(int) rint (matrix.m[1][2]), (int) rint (matrix.m[1][3]));
g_print (" %d, %d, %d, %d,\n",
(int) rint (matrix.m[2][0]),
(int) rint (matrix.m[2][1]),
(int) rint (matrix.m[2][2]), (int) rint (matrix.m[2][3]));
g_print ("};\n");
}
}
}
{
int cm, bits;
for (cm = 0; cm < 2; cm++) {
for (bits = 8; bits <= 8; bits += 1) {
ColorMatrix matrix;
color_matrix_set_identity (&matrix);
color_matrix_scale_components (&matrix, (1 / 255.0), (1 / 255.0),
(1 / 255.0));
/* colour matrix, RGB -> YCbCr */
if (cm) {
color_matrix_RGB_to_YCbCr (&matrix, 0.2126, 0.0722); /* HD */
} else {
color_matrix_RGB_to_YCbCr (&matrix, 0.2990, 0.1140); /* SD */
}
/*
* We are now in YCbCr space
*/
color_matrix_scale_components (&matrix, 219.0, 224.0, 224.0);
color_matrix_offset_components (&matrix, 16, 128, 128);
/* because we're doing 8-bit matrix coefficients */
color_matrix_scale_components (&matrix, 1 << bits, 1 << bits,
1 << bits);
g_print ("static const int cog_rgb_to_ycbcr_matrix_%dbit_%s[] = {\n",
bits, cm ? "hdtv" : "sdtv");
g_print (" %d, %d, %d, %d,\n",
(int) rint (matrix.m[0][0]),
(int) rint (matrix.m[0][1]),
(int) rint (matrix.m[0][2]), (int) rint (matrix.m[0][3]));
g_print (" %d, %d, %d, %d,\n",
(int) rint (matrix.m[1][0]),
(int) rint (matrix.m[1][1]),
(int) rint (matrix.m[1][2]), (int) rint (matrix.m[1][3]));
g_print (" %d, %d, %d, %d,\n",
(int) rint (matrix.m[2][0]),
(int) rint (matrix.m[2][1]),
(int) rint (matrix.m[2][2]), (int) rint (matrix.m[2][3]));
g_print ("};\n");
}
}
}
{
int cm, bits;
for (cm = 0; cm < 2; cm++) {
for (bits = 8; bits <= 8; bits += 1) {
ColorMatrix matrix;
color_matrix_set_identity (&matrix);
/* offset required to get input video black to (0.,0.,0.) */
/* we don't do this because the code does it for us */
color_matrix_offset_components (&matrix, -16, -128, -128);
color_matrix_scale_components (&matrix, (1 / 219.0), (1 / 224.0),
(1 / 224.0));
/* colour matrix, RGB -> YCbCr */
if (cm) {
color_matrix_YCbCr_to_RGB (&matrix, 0.2126, 0.0722); /* HD */
color_matrix_RGB_to_YCbCr (&matrix, 0.2990, 0.1140); /* SD */
} else {
color_matrix_YCbCr_to_RGB (&matrix, 0.2990, 0.1140); /* SD */
color_matrix_RGB_to_YCbCr (&matrix, 0.2126, 0.0722); /* HD */
}
/*
* We are now in YCbCr space
*/
color_matrix_scale_components (&matrix, 219.0, 224.0, 224.0);
color_matrix_offset_components (&matrix, 16, 128, 128);
/* because we're doing 8-bit matrix coefficients */
color_matrix_scale_components (&matrix, 1 << bits, 1 << bits,
1 << bits);
g_print
("static const int cog_ycbcr_%s_to_ycbcr_%s_matrix_%dbit[] = {\n",
cm ? "hdtv" : "sdtv", cm ? "sdtv" : "hdtv", bits);
g_print (" %d, %d, %d, %d,\n", (int) rint (matrix.m[0][0]),
(int) rint (matrix.m[0][1]), (int) rint (matrix.m[0][2]),
(int) rint (matrix.m[0][3]));
g_print (" %d, %d, %d, %d,\n", (int) rint (matrix.m[1][0]),
(int) rint (matrix.m[1][1]), (int) rint (matrix.m[1][2]),
(int) rint (matrix.m[1][3]));
g_print (" %d, %d, %d, %d,\n", (int) rint (matrix.m[2][0]),
(int) rint (matrix.m[2][1]), (int) rint (matrix.m[2][2]),
(int) rint (matrix.m[2][3]));
g_print ("};\n");
}
}
}
return 0;
}