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#include <stdio.h>
#include "video_decode.h"
#include "util.h"
int
pgm_save(unsigned char *buf, int wrap, int xsize, int ysize, char *filename)
{
FILE *f;
int i;
f = fopen(filename, "w");
if (f == NULL)
return -1;
fprintf(f, "P5\n%d %d\n%d\n", xsize, ysize, 255);
for(i = 0; i < ysize; i++)
fwrite(buf + i * wrap, 1, xsize, f);
fclose(f);
return 0;
}
void
frame_mix(struct video_frame *frame_a, struct video_frame *frame_b)
{
uint8_t *row_a = frame_a->data, *col_a = NULL;
uint8_t *row_b = frame_b->data, *col_b = NULL;
for (int y = 0; y < frame_a->height; ++y) {
col_a = row_a;
col_b = row_b;
for (int x = 0; x < frame_a->width; ++x) {
if (x > frame_a->width / 2)
*col_a = *col_b;
col_a++;
col_b++;
}
row_a += frame_a->stride;
row_b += frame_b->stride;
}
}
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