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librtlsdr
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rtl_fm: added options "-E [bcc|bclo|bchi]" 

Signed-off-by: hayati ayguen <h_ayguen@web.de>
development
hayati ayguen 2019-09-13 21:30:09 +00:00
parent a500314933
commit 993faef897
1 changed files with 16 additions and 0 deletions
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16
src/rtl_fm.c
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@ -161,6 +161,7 @@ struct dongle_state
uint32_t freq; uint32_t freq;
uint32_t rate; uint32_t rate;
uint32_t bandwidth; uint32_t bandwidth;
int bccorner; /* -1 for low band corner, 0 for band center, +1 for high band corner */
int gain; int gain;
int16_t buf16[MAXIMUM_BUF_LENGTH]; int16_t buf16[MAXIMUM_BUF_LENGTH];
uint32_t buf_len; uint32_t buf_len;
@ -305,6 +306,9 @@ void usage(void)
"\t deemp: enable de-emphasis filter\n" "\t deemp: enable de-emphasis filter\n"
"\t direct: enable direct sampling (bypasses tuner, uses rtl2832 xtal)\n" "\t direct: enable direct sampling (bypasses tuner, uses rtl2832 xtal)\n"
"\t offset: enable offset tuning (only e4000 tuner)\n" "\t offset: enable offset tuning (only e4000 tuner)\n"
"\t bcc: use tuner bandwidths center as band center (default)\n"
"\t bclo: use tuner bandwidths low corner as band center\n"
"\t bchi: use tuner bandwidths high corner as band center\n"
"%s" "%s"
"\t[-q dc_avg_factor for option rdc (default: 9)]\n" "\t[-q dc_avg_factor for option rdc (default: 9)]\n"
"\t[-n disables demodulation output to stdout/file]\n" "\t[-n disables demodulation output to stdout/file]\n"
@ -1521,6 +1525,11 @@ static void *controller_thread_fn(void *arg)
if ( dongle.bandwidth ) { if ( dongle.bandwidth ) {
if_band_center_freq = dongle.userFreq - dongle.freq; if_band_center_freq = dongle.userFreq - dongle.freq;
if (dongle.bccorner < 0)
if_band_center_freq += ( dongle.bandwidth - demod.rate_out ) / 2;
else if (dongle.bccorner > 0)
if_band_center_freq -= ( dongle.bandwidth - demod.rate_out ) / 2;
if ( prev_if_band_center_freq != if_band_center_freq ) { if ( prev_if_band_center_freq != if_band_center_freq ) {
r = rtlsdr_set_tuner_band_center(dongle.dev, if_band_center_freq ); r = rtlsdr_set_tuner_band_center(dongle.dev, if_band_center_freq );
if (r) if (r)
@ -1670,6 +1679,7 @@ void dongle_init(struct dongle_state *s)
s->samplePowCount = 0; s->samplePowCount = 0;
s->sampleMax = 0; s->sampleMax = 0;
s->bandwidth = 0; s->bandwidth = 0;
s->bccorner = 0;
s->buf_len = 32 * 512; /* see rtl_tcp */ s->buf_len = 32 * 512; /* see rtl_tcp */
} }
@ -1865,6 +1875,12 @@ int main(int argc, char **argv)
dongle.offset_tuning = 1;} dongle.offset_tuning = 1;}
if (strcmp("rtlagc", optarg) == 0 || strcmp("agc", optarg) == 0) { if (strcmp("rtlagc", optarg) == 0 || strcmp("agc", optarg) == 0) {
rtlagc = 1;} rtlagc = 1;}
if (strcmp("bclo", optarg) == 0 || strcmp("bcL", optarg) == 0 || strcmp("bcl", optarg) == 0) {
dongle.bccorner = -1; }
if (strcmp("bcc", optarg) == 0 || strcmp("bcC", optarg) == 0) {
dongle.bccorner = 0; }
if (strcmp("bchi", optarg) == 0 || strcmp("bcH", optarg) == 0 || strcmp("bch", optarg) == 0) {
dongle.bccorner = 1; }
break; break;
case 'O': case 'O':
rtlOpts = optarg; rtlOpts = optarg;