mirror/rtl-sdr-blog
1
0
Fork 0
mirror of https://github.com/rtlsdrblog/rtl-sdr-blog.git synced 2024-12-26 19:08:29 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

rtl_fm: better suffix parsing

Browse Source 
Signed-off-by: Steve Markgraf <steve@steve-m.de>
This commit is contained in:
Kyle Keen 2013-08-25 07:03:51 -04:00 committed by Steve Markgraf
parent cb8907dd4e
commit a6d7fff9ca
1 changed files with 21 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
src/rtl_fm.c
View File

@ -211,8 +211,8 @@ void low_pass(struct fm_state *fm, unsigned char *buf, uint32_t len)
{
int i=0, i2=0;
while (i < (int)len) {
fm->now_r += ((int)buf[i] - 128);
fm->now_j += ((int)buf[i+1] - 128);
fm->now_r += ((int)buf[i] - 127);
fm->now_j += ((int)buf[i+1] - 127);
i += 2;
fm->prev_index++;
if (fm->prev_index < fm->downsample) {
@ -254,8 +254,8 @@ void low_pass_fir(struct fm_state *fm, unsigned char *buf, uint32_t len)
int i=0, i2=0, i3=0;
while (i < (int)len) {
i3 = fm->prev_index;
fm->now_r += ((int)buf[i] - 128) * fm->fir[i3] * fm->downsample / fm->fir_sum;
fm->now_j += ((int)buf[i+1] - 128) * fm->fir[i3] * fm->downsample / fm->fir_sum;
fm->now_r += ((int)buf[i] - 127) * fm->fir[i3] * fm->downsample / fm->fir_sum;
fm->now_j += ((int)buf[i+1] - 127) * fm->fir[i3] * fm->downsample / fm->fir_sum;
i += 2;
fm->prev_index++;
if (fm->prev_index < fm->downsample) {
@ -679,24 +679,30 @@ static void *demod_thread_fn(void *arg)
return 0;
}
double atofs(char* f)
double atofs(char *f)
/* standard suffixes */
{
char* chop;
char last;
int len;
double suff = 1.0;
chop = malloc((strlen(f)+1)*sizeof(char));
strncpy(chop, f, strlen(f)-1);
switch (f[strlen(f)-1]) {
len = strlen(f);
last = f[len-1];
f[len-1] = '\0';
switch (last) {
case 'g':
case 'G':
suff *= 1e3;
case 'm':
case 'M':
suff *= 1e3;
case 'k':
case 'K':
suff *= 1e3;
suff *= atof(chop);}
free(chop);
if (suff != 1.0) {
return suff;}
suff *= atof(f);
f[len-1] = last;
return suff;
}
f[len-1] = last;
return atof(f);
}
@ -764,7 +770,7 @@ int main(int argc, char **argv)
pthread_rwlock_init(&data_rw, NULL);
pthread_mutex_init(&data_mutex, NULL);
while ((opt = getopt(argc, argv, "d:f:g:s:b:l:o:t:r:p:EFA:NWMULRDC")) != -1) {
while ((opt = getopt(argc, argv, "d:f:g:s:b:l:o:t:r:p:EFA:NWMULRDCh")) != -1) {
switch (opt) {
case 'd':
dev_index = atoi(optarg);
@ -853,6 +859,7 @@ int main(int argc, char **argv)
case 'R':
fm.mode_demod = &raw_demod;
break;
case 'h':
default:
usage();
break;