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/* randtone.c
* generate random a random walk for freq and duration
* to feed to tones program to play random tones.
*
* Usage: randtone freq [millisecs [iterations]]
*
* default millisecs is 250, default iterations is 1000
*/
#include <stdio.h>
main(argc,argv)
int argc;
char **argv;
{
int i,f,d,N;
argv++; argc--;
if (argc<1 || argc>3) {
printf("Usage: randtone freq [duration [num_tones]]\n");
printf("\n duration is in millisecs (def. 250), default num_tones is 1000.\n");
exit(1);
}
d=250; N=1000;
f=atoi(*argv); argv++; argc--;
if (argc) {
d=atoi(*argv++); argc--;
if (argc) {
N=atoi(*argv);
}
}
srandom(time(NULL)%(d+f));
for (i=0; i<N; i++) {
printf("%d:%d\n",f,d);
f=f+(random()%(f/4))-f/8;
f=(f<100)?(200-f):((f>5000)?(10000-f):f);
d=d+(random()%200)-100;
d=(d<25)?(50-d):((d>1000)?(2000-d):d);
}
}
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