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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pcd.h"
int
pcd_inter_m2(struct PCD_IMAGE *img)
{
register unsigned char *src, *dest;
register int x;
int y;
int left = img->left >> (img->res - 3);
int top = img->top >> (img->res - 3);
int width = img->width >> (img->res - 3);
int height = img->height >> (img->res - 3);
src = img->mmap + pcd_img_start[3] +
(pcd_def_width[3] >> 1) * 3 * top;
for (y = 0; y < height; y += 2) {
/* luma */
src += left;
for (dest = img->luma[y << 1], x = 0; x < width - 1; x++) {
*(dest++) = src[x], *(dest++) = (src[x] + src[x + 1] + 1) >> 1;
}
*(dest++) = src[x], *(dest++) = src[x];
src += pcd_def_width[3];
for (dest = img->luma[(y << 1) + 2], x = 0; x < width - 1; x++) {
*(dest++) = src[x], *(dest++) = (src[x] + src[x + 1] + 1) >> 1;
}
*(dest++) = src[x], *(dest++) = src[x];
src += pcd_def_width[3] - left;
/* chroma */
src += left >> 1;
for (dest = img->blue[y], x = 0; x < (width >> 1) - 1; x++) {
*(dest++) = src[x], *(dest++) = (src[x] + src[x + 1] + 1) >> 1;
}
*(dest++) = src[x], *(dest++) = src[x];
src += pcd_def_width[3] >> 1;
for (dest = img->red[y], x = 0; x < (width >> 1) - 1; x++) {
*(dest++) = src[x], *(dest++) = (src[x] + src[x + 1] + 1) >> 1;
}
*(dest++) = src[x], *(dest++) = src[x];
src += (pcd_def_width[3] - left) >> 1;
}
return 0;
}
int
pcd_inter_pixels(unsigned char **data, int width, int height)
{
register unsigned char *src, *dest;
register int x;
int y;
for (y = height - 2; y >= 0; y -= 2) {
src = data[y >> 1];
dest = data[y];
dest[width - 2] = dest[width - 1] = src[(width >> 1) - 1];
for (x = width - 4; x >= 0; x -= 2) {
dest[x] = src[x >> 1];
dest[x + 1] = (src[x >> 1] + src[(x >> 1) + 1] + 1) >> 1;
}
}
return 0;
}
int
pcd_inter_lines(unsigned char **data, int width, int height)
{
register unsigned char *src1, *src2, *dest;
register int x;
int y;
for (y = 0; y < height - 2; y += 2) {
src1 = data[y];
dest = data[y + 1];
src2 = data[y + 2];
for (x = 0; x < width - 2; x += 2) {
dest[x] = (src1[x] + src2[x] + 1) >> 1;
dest[x + 1] = (src1[x] + src2[x] + src1[x + 2] + src2[x + 2] + 2) >> 2;
}
dest[x] = dest[x + 1] = (src1[x] + src2[x] + 1) >> 1;
}
src1 = data[y];
dest = data[y + 1];
for (x = 0; x < width - 2; x += 2) {
dest[x] = src1[x];
dest[x + 1] = (src1[x] + src1[x + 2] + 1) >> 1;
}
dest[x] = dest[x + 1] = src1[x];
return 0;
}
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