static void
print_summary(struct measurements *m)
{
int res;
int max_freq = (int)m->max_frequency,
mean_freq = (int)mean_frequency(m);
printf("Estimated sampling frequency: %dHz (mean %dHz)\n",
max_freq, mean_freq);
if (max_freq > mean_freq * 1.3)
printf("WARNING: Max frequency is more than 30%% higher "
"than mean frequency. Manual verification required!\n");
printf("To calculate resolution, measure physical distance covered\n"
"and look up the matching resolution in the table below\n");
m->distance = abs(m->distance);
/* If the mouse has more than 2500dpi, the manufacturer usually
shows off on their website anyway */
for (res = 400; res <= 2500; res += 200) {
double inch = m->distance/(double)res;
printf("%8dmm %8.2fin %8ddpi\n",
(int)(inch * 25.4), inch, res);
}
printf("If your resolution is not in the list, calculate it with:\n"
"\tresolution=%d/inches, or\n"
"\tresolution=%d * 25.4/mm\n", m->distance, m->distance);
}
value_t mean_frequency(const vec& signal,const int fs)
{
return mean_frequency(fft(signal,fs));
}
