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