Print receiver range statistics in the log every N seconds, if requested.

This feature makes it easier to quickly see if the receiver is performing
as expected, when running gnuais on a remote site on a little
Raspberry Pi or some other computer with no GUI, or remotely over ssh.

Author: hessu

gnuais.conf-example

@@ -37,6 +37,15 @@ SoundChannels both
 # to disable level logging below distortion levels.
 SoundLevelLog 1
 
+# Print receiver range statistics in the log every N seconds.
+# StatsInterval defines the logging interval. Latitude and Longitude of the
+# receiver are given in decimal degrees (not degrees and minutes, or seconds).
+# Positive values for northern latitude and eastern longitude, negative
+# values for southern latitude and western longitude.
+#StatsInterval 10
+#Latitude 35.2512
+#Longitude 110.8175
+
 # AIS data uplink configuration - received APRS data will be posted here
 # periodically. Can be used for exporting data to aprs.fi. You need to get a
 # key for your receiving site to submit data, please read the instructions

src/CMakeLists.txt

@@ -1,10 +1,10 @@
 if(HAVE_PULSEAUDIO)
-        add_executable(gnuais ais.c ais.c cfg.c crc32.c hlog.c input.c out_mysql.c receiver.c splay.c cache.c cfgfile.c filter.c hmalloc.c out_json.c protodec.c rwlock.c serial.c spsymbol.c ipc.c pulseaudio.c) 
+        add_executable(gnuais ais.c ais.c cfg.c crc32.c hlog.c input.c out_mysql.c receiver.c splay.c cache.c range.c cfgfile.c filter.c hmalloc.c out_json.c protodec.c rwlock.c serial.c spsymbol.c ipc.c pulseaudio.c) 
 else()
-        add_executable(gnuais ais.c ais.c cfg.c crc32.c hlog.c input.c out_mysql.c receiver.c splay.c cache.c cfgfile.c filter.c hmalloc.c out_json.c protodec.c rwlock.c serial.c spsymbol.c ipc.c) 
+        add_executable(gnuais ais.c ais.c cfg.c crc32.c hlog.c input.c out_mysql.c receiver.c splay.c cache.c range.c cfgfile.c filter.c hmalloc.c out_json.c protodec.c rwlock.c serial.c spsymbol.c ipc.c) 
 endif()
 
-target_link_libraries(gnuais pthread asound)
+target_link_libraries(gnuais pthread asound m)
 
 if(HAVE_MYSQL)
     target_link_libraries(gnuais mysqlclient)

src/ais.c

@@ -38,6 +38,7 @@
 #include "out_mysql.h"
 #include "out_json.h"
 #include "cache.h"
+#include "range.h"
 #include "ipc.h"
 #ifdef HAVE_PULSEAUDIO
 #include "pulseaudio.h"
@@ -77,6 +78,7 @@ int main(int argc, char *argv[])
 #ifdef HAVE_PULSEAUDIO
 	pa_simple *pa_dev = NULL;
 #endif
+	time_t last_stats = time(NULL);
 
 	/* command line */
 	parse_cmdline(argc, argv);
@@ -244,6 +246,17 @@ int main(int argc, char *argv[])
 			/* ch b/1/left */
 			receiver_run(rx_b, buffer, buffer_read);
 		}
+		
+		if (stats_interval) {
+			time_t now = time(NULL);
+			if (last_stats > now) {
+				// clock jumped backwards
+				last_stats = now;
+			} else if (now - last_stats >= stats_interval) {
+				last_stats = now;
+				log_range();
+			}
+		}
 	}
 
 	hlog(LOG_NOTICE, "Closing down...");

src/cfg.c

@@ -35,6 +35,7 @@
 #include "hmalloc.h"
 #include "hlog.h"
 #include "cfgfile.h"
+#include "range.h"
 
 #ifdef DMALLOC
 #include <dmalloc.h>
@@ -58,6 +59,7 @@ char *myemail;
 
 float mylat = -200.0;
 float mylng = -200.0;
+int have_my_loc;
 
 char *sound_device;
 char *sound_in_file;
@@ -359,6 +361,12 @@ int read_config(void)
 		sound_device = NULL;
 	}
 
+	have_my_loc = (mylat > -90 && mylat < 90 && mylng > -180 && mylng < 180);
+	if (have_my_loc) {
+		mylat = lat2rad(mylat);
+		mylng = lon2rad(mylng);
+	}
+	
 	/* put in the new uplink config */
 	free_uplink_config(&uplink_config);
 	uplink_config = new_uplink_config;

src/cfg.h

@@ -54,6 +54,7 @@ extern char *mycall;
 extern char *myemail;
 
 extern float mylat, mylng;
+extern int have_my_loc;
 
 extern char *sound_device;
 extern char *sound_in_file;

src/protodec.c

@@ -35,6 +35,7 @@
 #include "cfg.h"
 #include "hlog.h"
 #include "cache.h"
+#include "range.h"
 #include "ipc.h"
 
 #ifdef DMALLOC
@@ -394,6 +395,9 @@ void protodec_pos(struct demod_state_t *d, int bufferlen, time_t received_t, uns
 			(float) course / 10.0,
 			rateofturn,
 			(float) sog / 10.0);
+	
+	if (have_my_loc)
+		update_range((float) latitude / 600000.0, (float) longitude / 600000.0);
 }
 
 void protodec_4(struct demod_state_t *d, int bufferlen, time_t received_t, unsigned long mmsi)
@@ -433,6 +437,9 @@ void protodec_4(struct demod_state_t *d, int bufferlen, time_t received_t, unsig
 			(float) latitude / 600000.0,
 			(float) longitude / 600000.0,
 			0, 0.0, 0, 0.0);
+	
+	if (have_my_loc)
+		update_range((float) latitude / 600000.0, (float) longitude / 600000.0);
 }
 
 void protodec_5(struct demod_state_t *d, int bufferlen, time_t received_t, unsigned long mmsi)
@@ -617,6 +624,9 @@ void protodec_18(struct demod_state_t *d, int bufferlen, time_t received_t, unsi
 		(float) course / 10.0,
 		rateofturn,
 		(float) sog / 10.0);
+	
+	if (have_my_loc)
+		update_range((float) latitude / 600000.0, (float) longitude / 600000.0);
 }
 
 void protodec_19(struct demod_state_t *d, int bufferlen, time_t received_t, unsigned long mmsi)