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Add option to allow band inversion

pull/16/head^2
Cees Bassa 2021-04-08 17:27:05 +02:00
parent 98bcfe5e6e
commit 0bd116be5a
1 changed files with 10 additions and 4 deletions
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14
rffft.c
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@ -23,6 +23,7 @@ void usage(void)
printf("-F <format> Input format char, int, float [int]\n");
printf("-T <start time> YYYY-MM-DDTHH:MM:SSS.sss\n");
printf("-R <fmin,fmax> Frequency range to store (Hz)\n");
printf("-I Invert frequencies\n");
printf("-b Digitize output to bytes [off]\n");
printf("-q Quiet mode, no output [off]\n");
printf("-h This help\n");
@ -46,10 +47,11 @@ int main(int argc,char *argv[])
double freq,samp_rate,mjd,freqmin=-1,freqmax=-1;
struct timeval start,end;
char tbuf[30],nfd[32],header[256]="";
int sign=1;
// Read arguments
if (argc>1) {
while ((arg=getopt(argc,argv,"i:f:s:c:t:p:n:hm:F:T:bqR:o:"))!=-1) {
while ((arg=getopt(argc,argv,"i:f:s:c:t:p:n:hm:F:T:bqR:o:I"))!=-1) {
switch(arg) {
case 'i':
@ -115,6 +117,10 @@ int main(int argc,char *argv[])
realtime=0;
break;
case 'I':
sign=-1;
break;
case 'h':
usage();
return 0;
@ -235,17 +241,17 @@ int main(int argc,char *argv[])
if (informat=='i') {
for (i=0;i<nchan;i++) {
c[i][0]=(float) ibuf[2*i]/32768.0*zw[i];
c[i][1]=(float) ibuf[2*i+1]/32768.0*zw[i];
c[i][1]=(float) ibuf[2*i+1]/32768.0*zw[i]*sign;
}
} else if (informat=='c') {
for (i=0;i<nchan;i++) {
c[i][0]=(float) cbuf[2*i]/256.0*zw[i];
c[i][1]=(float) cbuf[2*i+1]/256.0*zw[i];
c[i][1]=(float) cbuf[2*i+1]/256.0*zw[i]*sign;
}
} else if (informat=='f') {
for (i=0;i<nchan;i++) {
c[i][0]=(float) fbuf[2*i]*zw[i];
c[i][1]=(float) fbuf[2*i+1]*zw[i];
c[i][1]=(float) fbuf[2*i+1]*zw[i]*sign;
}
}