static double
parse_percentage(void)
{
double percentage;
start_parsing_value();
percentage = parse_double_in_value();
match_symbol_in_value('%');
stop_parsing_value();
check_double_range("percentage", percentage, 0.0, 100.0);
return(percentage / 100.0);
}
int
main (int argc, char * argv [])
{
PARAMS params = { 1.0, -1, -1, 0, 0, 0, NULL } ;
const char * filename ;
int k ;
if (argc < 4)
usage_exit (argv [0]) ;
for (k = 1 ; k < argc - 3 ; k++)
{ if (strcmp (argv [k], "-from") == 0)
{ k++ ;
params.start_freq = parse_double_or_die (argv [k], "from frequency") ;
continue ;
} ;
if (strcmp (argv [k], "-to") == 0)
{ k++ ;
params.end_freq = parse_double_or_die (argv [k], "to frequency") ;
continue ;
} ;
if (strcmp (argv [k], "-amp") == 0)
{ k++ ;
params.amplitude = strtod (argv [k], NULL) ;
continue ;
} ;
if (argv [k][0] == '-')
{ params.sweep_func = parse_sweep_type (argv [k]) ;
continue ;
} ;
printf ("\nUnknow option '%s'.\n\n", argv [k]) ;
exit (1) ;
} ;
params.samplerate = parse_int_or_die (argv [argc - 3], "sample rate") ;
params.seconds = parse_double_or_die (argv [argc - 2], "seconds") ;
filename = argv [argc - 1] ;
check_int_range ("sample rate", params.samplerate, 1000, 200 * 1000) ;
check_double_range ("seconds", params.seconds, 0.1, 100.0) ;
if (params.sweep_func == NULL)
params.sweep_func = parse_sweep_type ("-log") ;
if (params.start_freq <= 0.0)
params.start_freq = 100.0 ;
if (params.end_freq <= 0.0)
params.end_freq = params.samplerate / 2.0 - 100.0 ;
if (params.end_freq <= params.start_freq)
{ printf ("\nError : end frequency %g < start frequency %g.\n\n", params.end_freq, params.start_freq) ;
exit (1) ;
} ;
params.format = guess_major_format (filename) | SF_FORMAT_FLOAT ;
generate_file (filename, ¶ms) ;
return 0 ;
} /* main */
