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#ifndef _UTIL_H_
#define _UTIL_H_
#include <stdint.h>
static inline void
pswap(void **p1, void **p2)
{
void *tmp;
tmp = *p1;
*p1 = *p2;
*p2 = tmp;
}
int
pgm_read(char *filename, unsigned char **buf, int *xsize, int *ysize);
int
pgm_save(unsigned char *buf, int wrap, int xsize, int ysize, char *filename);
/* Store half of frame_a and half of frame_b in frame_a */
void
frame_mix(struct video_frame *frame_a, struct video_frame *frame_b);
double
frame_diff(struct video_frame *frame_a, struct video_frame *frame_b);
void
print_time(int64_t msec);
#endif /* _UTIL_H_ */
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