C-Netz: Add option to control voice deviation

src/cnetz/cnetz.c

@@ -246,7 +246,7 @@ int cnetz_init(void)
 }
 
 /* Create transceiver instance and link to a list. */
-int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *audiodev, int use_sdr, enum demod_type demod, int samplerate, double rx_gain, int auth, int warteschlange, int metering, int ms_power, int measure_speed, double clock_speed[2], int polarity, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback)
+int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *audiodev, int use_sdr, enum demod_type demod, int samplerate, double rx_gain, int auth, int warteschlange, int metering, double dbm0_deviation, int ms_power, int measure_speed, double clock_speed[2], int polarity, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback)
 {
 	sender_t *sender;
 	cnetz_t *cnetz;
@@ -320,7 +320,7 @@ int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *audiodev
 #endif
 
 	/* init audio processing */
-	rc = dsp_init_sender(cnetz, measure_speed, clock_speed, demod);
+	rc = dsp_init_sender(cnetz, measure_speed, clock_speed, demod, dbm0_deviation);
 	if (rc < 0) {
 		PDEBUG(DCNETZ, DEBUG_ERROR, "Failed to init signal processing!\n");
 		goto error;

src/cnetz/cnetz.h

@@ -133,7 +133,7 @@ int cnetz_channel_by_short_name(const char *short_name);
 const char *chan_type_short_name(enum cnetz_chan_type chan_type);
 const char *chan_type_long_name(enum cnetz_chan_type chan_type);
 int cnetz_init(void);
-int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *audiodev, int use_sdr, enum demod_type demod, int samplerate, double rx_gain, int auth, int warteschlange, int metering, int ms_power, int measure_speed, double clock_speed[2], int polarity, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback);
+int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *audiodev, int use_sdr, enum demod_type demod, int samplerate, double rx_gain, int auth, int warteschlange, int metering, double dbm0_deviation, int ms_power, int measure_speed, double clock_speed[2], int polarity, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback);
 void cnetz_destroy(sender_t *sender);
 void cnetz_go_idle(cnetz_t *cnetz);
 void cnetz_sync_frame(cnetz_t *cnetz, double sync, int ts);

src/cnetz/dsp.c

@@ -42,8 +42,7 @@
 
 #define MAX_DEVIATION	4000.0
 #define MAX_MODULATION	3000.0
-#define DBM0_DEVIATION	4000.0	/* deviation of dBm0 at 1 kHz */
-#define FSK_DEVIATION	(2500.0 / DBM0_DEVIATION) /* no emphasis */
+#define FSK_DEVIATION	(2500.0 / dbm0_deviation) /* no emphasis */
 #define MAX_DISPLAY	1.4	/* something above dBm0, no emphasis */
 #define BITRATE		5280.0	/* bits per second */
 #define BLOCK_BITS	198	/* duration of one time slot including pause at beginning and end */
@@ -81,7 +80,7 @@ static void dsp_init_ramp(cnetz_t *cnetz)
 }
 
 /* Init transceiver instance. */
-int dsp_init_sender(cnetz_t *cnetz, int measure_speed, double clock_speed[2], enum demod_type demod)
+int dsp_init_sender(cnetz_t *cnetz, int measure_speed, double clock_speed[2], enum demod_type demod, double dbm0_deviation)
 {
 	int rc = 0;
 	double size;
@@ -90,7 +89,7 @@ int dsp_init_sender(cnetz_t *cnetz, int measure_speed, double clock_speed[2], en
 	PDEBUG_CHAN(DDSP, DEBUG_DEBUG, "Init FSK for 'Sender'.\n");
 
 	/* set modulation parameters */
-	sender_set_fm(&cnetz->sender, MAX_DEVIATION, MAX_MODULATION, DBM0_DEVIATION, MAX_DISPLAY);
+	sender_set_fm(&cnetz->sender, MAX_DEVIATION, MAX_MODULATION, dbm0_deviation, MAX_DISPLAY);
 
 	if (measure_speed) {
 		cnetz->measure_speed = measure_speed;

src/cnetz/dsp.h

@@ -1,6 +1,6 @@
 
 void dsp_init(void);
-int dsp_init_sender(cnetz_t *cnetz, int measure_speed, double clock_speed[2], enum demod_type demod);
+int dsp_init_sender(cnetz_t *cnetz, int measure_speed, double clock_speed[2], enum demod_type demod, double dbm0_deviation);
 void dsp_cleanup_sender(cnetz_t *cnetz);
 void calc_clock_speed(cnetz_t *cnetz, double samples, int tx, int result);
 void unshrink_speech(cnetz_t *cnetz, sample_t *speech_buffer, int count);

src/cnetz/main.c

@@ -68,6 +68,7 @@ int8_t	futln_sperre_start = -1; /* no blocking */
 int8_t	futln_sperre_end = -1; /* no range */
 enum demod_type demod = FSK_DEMOD_AUTO;
 int metering = 20;
+double dbm0_deviation = 4000.0; /* best results with all my equipment */
 
 void print_help(const char *arg0)
 {
@@ -103,6 +104,10 @@ void print_help(const char *arg0)
 	printf(" -G --gebuehren <seconds> | 0\n");
 	printf("        Increment  metering counter every given number of seconds.\n");
 	printf("        To turn off, use 0. (default = %d)\n", metering);
+	printf(" -V --voice-deviation <2400..4000 Hz>\n");
+	printf("        It is unclear what the actual voice deviation is. Please decrease, if\n");
+	printf("        mobile's microphone is too loud and speaker is too quiet.\n");
+	printf("        (default = %.0f)\n", dbm0_deviation);
 	printf(" -S --sysinfo fuz-nat=<nat>\n");
 	printf("        Set country ID of base station. All IDs were used inside Germany only.\n");
 	printf("        (default = %d)\n", fuz_nat);
@@ -230,6 +235,7 @@ static void add_options(void)
 	option_add('Q', "queue", 1);
 	option_add(OPT_WARTESCHLANGE, "warteschlange", 1);
 	option_add('G', "gebuehren", 1);
+	option_add('V', "voice-deviation", 1);
 	option_add('S', "sysinfo", 1);
 	option_add('D', "demod", 1);
 }
@@ -290,6 +296,9 @@ static int handle_options(int short_option, int argi, char **argv)
 	case 'G':
 		metering = atoi(argv[argi]);
 		break;
+	case 'V':
+		dbm0_deviation = atoi_limit(argv[argi], 2400, 4000);
+		break;
 	case 'S':
 		p = strchr(argv[argi], '=');
 		if (!p) {
@@ -542,7 +551,7 @@ int main(int argc, char *argv[])
 
 	/* create transceiver instance */
 	for (i = 0; i < num_kanal; i++) {
-		rc = cnetz_create(kanal[i], chan_type[i], audiodev[i], use_sdr, demod, samplerate, rx_gain, auth, warteschlange, metering, ms_power, (i == 0) ? measure_speed : 0, clock_speed, polarity, do_pre_emphasis, do_de_emphasis, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, loopback);
+		rc = cnetz_create(kanal[i], chan_type[i], audiodev[i], use_sdr, demod, samplerate, rx_gain, auth, warteschlange, metering, dbm0_deviation, ms_power, (i == 0) ? measure_speed : 0, clock_speed, polarity, do_pre_emphasis, do_de_emphasis, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, loopback);
 		if (rc < 0) {
 			fprintf(stderr, "Failed to create \"Sender\" instance. Quitting!\n");
 			goto fail;