utils: tejeez's no-mod direct sampling

src/convenience/convenience.c

@@ -174,6 +174,8 @@ int verbose_direct_sampling(rtlsdr_dev_t *dev, int on)
 		fprintf(stderr, "Enabled direct sampling mode, input 1/I.\n");}
 	if (on == 2) {
 		fprintf(stderr, "Enabled direct sampling mode, input 2/Q.\n");}
+	if (on == 3) {
+		fprintf(stderr, "Enabled no-mod direct sampling mode.\n");}
 	return r;
 }
 

src/rtl_fm.c

@@ -204,6 +204,7 @@ void usage(void)
 		"\t    dc:     enable dc blocking filter\n"
 		"\t    deemp:  enable de-emphasis filter\n"
 		"\t    direct: enable direct sampling\n"
+		"\t    no-mod: enable no-mod direct sampling\n"
 		"\t    offset: enable offset tuning\n"
 		"\tfilename ('-' means stdout)\n"
 		"\t    omitting the filename also uses stdout\n\n"
@@ -891,7 +892,7 @@ static void *controller_thread_fn(void *arg)
 	/* set up primary channel */
 	optimal_settings(s->freqs[0], demod.rate_in);
 	if (dongle.direct_sampling) {
-		verbose_direct_sampling(dongle.dev, 1);}
+		verbose_direct_sampling(dongle.dev, dongle.direct_sampling);}
 	if (dongle.offset_tuning) {
 		verbose_offset_tuning(dongle.dev);}
 
@@ -1104,6 +1105,8 @@ int main(int argc, char **argv)
 				demod.deemph = 1;}
 			if (strcmp("direct",  optarg) == 0) {
 				dongle.direct_sampling = 1;}
+			if (strcmp("no-mod",  optarg) == 0) {
+				dongle.direct_sampling = 3;}
 			if (strcmp("offset",  optarg) == 0) {
 				dongle.offset_tuning = 1;}
 			break;

src/rtl_power.c

@@ -148,7 +148,7 @@ void usage(void)
 		"\t  fir_size can be 0 or 9.  0 has bad roll off,\n"
 		"\t  try with '-c 50%%')\n"
 		"\t[-P enables peak hold (default: off)]\n"
-		"\t[-D enable direct sampling (default: off)]\n"
+		"\t[-D direct_sampling_mode, 0 (default/off), 1 (I), 2 (Q), 3 (no-mod)]\n"
 		"\t[-O enable offset tuning (default: off)]\n"
 		"\n"
 		"CSV FFT output columns:\n"
@@ -781,7 +781,7 @@ int main(int argc, char **argv)
 	double (*window_fn)(int, int) = rectangle;
 	freq_optarg = "";
 
-	while ((opt = getopt(argc, argv, "f:i:s:t:d:g:p:e:w:c:F:1PDOh")) != -1) {
+	while ((opt = getopt(argc, argv, "f:i:s:t:d:g:p:e:w:c:F:1PD:Oh")) != -1) {
 		switch (opt) {
 		case 'f': // lower:upper:bin_size
 			freq_optarg = strdup(optarg);
@@ -840,7 +840,7 @@ int main(int argc, char **argv)
 			peak_hold = 1;
 			break;
 		case 'D':
-			direct_sampling = 1;
+			direct_sampling = atoi(optarg);
 			break;
 		case 'O':
 			offset_tuning = 1;
@@ -908,7 +908,7 @@ int main(int argc, char **argv)
 #endif
 
 	if (direct_sampling) {
-		verbose_direct_sampling(dev, 1);
+		verbose_direct_sampling(dev, direct_sampling);
 	}
 
 	if (offset_tuning) {

src/rtl_sdr.c

@@ -55,6 +55,7 @@ void usage(void)
 		"\t[-b output_block_size (default: 16 * 16384)]\n"
 		"\t[-n number of samples to read (default: 0, infinite)]\n"
 		"\t[-S force sync output (default: async)]\n"
+		"\t[-D direct_sampling_mode, 0 (default/off), 1 (I), 2 (Q), 3 (no-mod)]\n"
 		"\tfilename (a '-' dumps samples to stdout)\n\n");
 	exit(1);
 }
@@ -113,6 +114,7 @@ int main(int argc, char **argv)
 	int gain = 0;
 	int ppm_error = 0;
 	int sync_mode = 0;
+	int direct_sampling = 0;
 	FILE *file;
 	uint8_t *buffer;
 	int dev_index = 0;
@@ -121,7 +123,7 @@ int main(int argc, char **argv)
 	uint32_t samp_rate = DEFAULT_SAMPLE_RATE;
 	uint32_t out_block_size = DEFAULT_BUF_LENGTH;
 
-	while ((opt = getopt(argc, argv, "d:f:g:s:b:n:p:S")) != -1) {
+	while ((opt = getopt(argc, argv, "d:f:g:s:b:n:p:D:S")) != -1) {
 		switch (opt) {
 		case 'd':
 			dev_index = verbose_device_search(optarg);
@@ -148,6 +150,9 @@ int main(int argc, char **argv)
 		case 'S':
 			sync_mode = 1;
 			break;
+		case 'D':
+			direct_sampling = atoi(optarg);
+			break;
 		default:
 			usage();
 			break;
@@ -197,6 +202,11 @@ int main(int argc, char **argv)
 #else
 	SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
 #endif
+
+	if (direct_sampling) {
+		verbose_direct_sampling(dev, direct_sampling);
+	}
+
 	/* Set the sample rate */
 	verbose_set_sample_rate(dev, samp_rate);