A-Netz: Don't allow emphasis, since it is not used with A-Netz

This commit is contained in:
Andreas Eversberg 2017-01-02 10:16:49 +01:00
parent e724823c5b
commit 16e1e842b9
3 changed files with 14 additions and 0 deletions

View File

@ -117,6 +117,9 @@ int main(int argc, char *argv[])
const char *station_id = "";
int i;
/* a-netz does not use emphasis, so disable it */
uses_emphasis = 0;
/* init common tones */
init_freiton();
init_besetzton();

View File

@ -8,6 +8,7 @@ extern int samplerate;
extern int interval;
extern int latency;
extern int cross_channels;
extern int uses_emphasis;
extern int do_pre_emphasis;
extern int do_de_emphasis;
extern double rx_gain;

View File

@ -43,6 +43,7 @@ int samplerate = 48000;
int interval = 1;
int latency = 50;
int cross_channels = 0;
int uses_emphasis = 1;
int do_pre_emphasis = 0;
int do_de_emphasis = 0;
double rx_gain = 1.0;
@ -83,12 +84,14 @@ void print_help_common(const char *arg0, const char *ext_usage)
printf(" -x --cross\n");
printf(" Cross channels on sound card. 1st channel (right) is swapped with\n");
printf(" second channel (left)\n");
if (uses_emphasis) {
printf(" -p --pre-emphasis\n");
printf(" Enable pre-emphasis, if you directly connect to the oscillator of the\n");
printf(" transmitter. (No pre-emphasis done by the transmitter.)\n");
printf(" -d --de-emphasis\n");
printf(" Enable de-emphasis, if you directly connect to the discriminator of\n");
printf(" the receiver. (No de-emphasis done by the receiver.)\n");
}
printf(" -g --rx-gain <dB>\n");
printf(" Raise receiver RX level by given gain in dB. This is useful if input\n");
printf(" level of the sound device is too low, even after setting maximum level\n");
@ -234,10 +237,17 @@ void opt_switch_common(int c, char *arg0, int *skip_args)
*skip_args += 1;
break;
case 'p':
if (!uses_emphasis) {
no_emph:
fprintf(stderr, "A-Netz does not use emphasis, please do not enable pre- or de-emphasis! Disable emphasis on transceiver, if possible.\n");
exit(0);
}
do_pre_emphasis = 1;
*skip_args += 1;
break;
case 'd':
if (!uses_emphasis)
goto no_emph;
do_de_emphasis = 1;
*skip_args += 1;
break;