floktest.cpp

#include <math.h>
#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <unistd.h>
#include <malloc.h>
#include <string.h>
#include <sys/time.h>

int main()
{
	const unsigned w = 1280;
	const unsigned h =  720;
	const unsigned d =    1;
	const int num_frames = 1000;
	const int nl3 = 1;
	const int percentage_pixels_changed = 2;


	struct timeval the_time;
	gettimeofday(&the_time, NULL);
	double time_start = the_time.tv_sec + 1e-6*the_time.tv_usec;

	int triggered = 0;
	unsigned num_triggered = 0;

	uint8_t *work       = (uint8_t *) malloc(w*h*d);
	uint8_t *prev_frame = (uint8_t *) malloc(w*h*d);

	memset(work,0,w*h*d);
	memset(prev_frame,2,w*h*d);

	for (unsigned frame=0; frame<num_frames; frame++)
	{
		uint8_t *pw = work, *pp = prev_frame;

		int cnt = 0;
		for(int i=0; i<w*h; i++) {
			int lc = 0, lp = 0;
			for (unsigned j=0; j<d; j++) lc += *pw++;
			for (unsigned j=0; j<d; j++) lp += *pp++;
			cnt += abs(lc - lp) >= nl3;
		}

		triggered = cnt > (percentage_pixels_changed / 100) * w * h;
		if (triggered) num_triggered++;

		//free(work);
		//free(prev_frame);
	}

	gettimeofday(&the_time, NULL);
	double time_stop = the_time.tv_sec + 1e-6*the_time.tv_usec;

	printf("%u triggered\n",num_triggered);
	printf("%u frames in %.2f seconds\n",num_frames,time_stop-time_start);
	printf("%.2f fps\n",1.0*num_frames/(time_stop-time_start));

}