unsigned short checkButtons() {
unsigned short state;
unsigned int cnt;
buttons = ~PORTB & 0x07;
state = buttons;
cnt = 0;
// Debounce switches.
while (state != 0) {
// Allow multi-press buttons to "pile-on".
if ( num_bits_set[state] > num_bits_set[buttons] ) {
buttons = state;
}
delay_ms(1);
backgroundTasks();
state = ~PORTB & 0x07;
// Indicate long button press.
if (cnt++ > 1000) {
buttons = buttons | 0x08;
break;
}
}
// Note, we exit early on a long press and the user may still have his finger
// on the button. The calling routine needs to deal with this!
return buttons;
}
// Wait for all buttons to be released
void waitButtonRelease() {
buttons = ~PORTB & 0x07;
while (buttons != 0) {
delay_ms(1);
backgroundTasks();
buttons = ~PORTB & 0x07;
}
}
//
//=========================================================================
//
int main(int argc, char **argv) {
int j;
// Set sane defaults
modesInitConfig();
signal(SIGINT, sigintHandler); // Define Ctrl/C handler (exit program)
// Parse the command line options
for (j = 1; j < argc; j++) {
int more = j+1 < argc; // There are more arguments
if (!strcmp(argv[j],"--device-index") && more) {
Modes.dev_index = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--gain") && more) {
Modes.gain = (int) atof(argv[++j])*10; // Gain is in tens of DBs
} else if (!strcmp(argv[j],"--enable-agc")) {
Modes.enable_agc++;
} else if (!strcmp(argv[j],"--freq") && more) {
Modes.freq = (int) strtoll(argv[++j],NULL,10);
} else if (!strcmp(argv[j],"--ifile") && more) {
Modes.filename = strdup(argv[++j]);
} else if (!strcmp(argv[j],"--fix")) {
Modes.nfix_crc = 1;
} else if (!strcmp(argv[j],"--no-fix")) {
Modes.nfix_crc = 0;
} else if (!strcmp(argv[j],"--no-crc-check")) {
Modes.check_crc = 0;
} else if (!strcmp(argv[j],"--phase-enhance")) {
Modes.phase_enhance = 1;
} else if (!strcmp(argv[j],"--raw")) {
Modes.raw = 1;
} else if (!strcmp(argv[j],"--net")) {
Modes.net = 1;
} else if (!strcmp(argv[j],"--modeac")) {
Modes.mode_ac = 1;
} else if (!strcmp(argv[j],"--net-beast")) {
Modes.beast = 1;
} else if (!strcmp(argv[j],"--net-only")) {
Modes.net = 1;
Modes.net_only = 1;
} else if (!strcmp(argv[j],"--net-heartbeat") && more) {
Modes.net_heartbeat_rate = atoi(argv[++j]) * 15;
} else if (!strcmp(argv[j],"--net-ro-size") && more) {
Modes.net_output_raw_size = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-ro-rate") && more) {
Modes.net_output_raw_rate = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-ro-port") && more) {
if (Modes.beast) // Required for legacy backward compatibility
{Modes.net_output_beast_port = atoi(argv[++j]);;}
else
{Modes.net_output_raw_port = atoi(argv[++j]);}
} else if (!strcmp(argv[j],"--net-ri-port") && more) {
Modes.net_input_raw_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-bo-port") && more) {
Modes.net_output_beast_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-bi-port") && more) {
Modes.net_input_beast_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-http-port") && more) {
Modes.net_http_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-sbs-port") && more) {
Modes.net_output_sbs_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--onlyaddr")) {
Modes.onlyaddr = 1;
} else if (!strcmp(argv[j],"--metric")) {
Modes.metric = 1;
} else if (!strcmp(argv[j],"--aggressive")) {
Modes.nfix_crc = MODES_MAX_BITERRORS;
} else if (!strcmp(argv[j],"--interactive")) {
Modes.interactive = 1;
} else if (!strcmp(argv[j],"--interactive-rows") && more) {
Modes.interactive_rows = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--interactive-ttl") && more) {
Modes.interactive_display_ttl = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--lat") && more) {
Modes.fUserLat = atof(argv[++j]);
} else if (!strcmp(argv[j],"--lon") && more) {
Modes.fUserLon = atof(argv[++j]);
} else if (!strcmp(argv[j],"--debug") && more) {
char *f = argv[++j];
while(*f) {
switch(*f) {
case 'D': Modes.debug |= MODES_DEBUG_DEMOD; break;
case 'd': Modes.debug |= MODES_DEBUG_DEMODERR; break;
case 'C': Modes.debug |= MODES_DEBUG_GOODCRC; break;
case 'c': Modes.debug |= MODES_DEBUG_BADCRC; break;
case 'p': Modes.debug |= MODES_DEBUG_NOPREAMBLE; break;
case 'n': Modes.debug |= MODES_DEBUG_NET; break;
case 'j': Modes.debug |= MODES_DEBUG_JS; break;
default:
fprintf(stderr, "Unknown debugging flag: %c\n", *f);
exit(1);
break;
}
f++;
}
} else if (!strcmp(argv[j],"--stats")) {
Modes.stats = 1;
} else if (!strcmp(argv[j],"--snip") && more) {
snipMode(atoi(argv[++j]));
exit(0);
} else if (!strcmp(argv[j],"--help")) {
showHelp();
exit(0);
} else if (!strcmp(argv[j],"--ppm") && more) {
Modes.ppm_error = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--quiet")) {
Modes.quiet = 1;
} else if (!strcmp(argv[j],"--mlat")) {
Modes.mlat = 1;
} else if (!strcmp(argv[j],"--interactive-rtl1090")) {
Modes.interactive = 1;
Modes.interactive_rtl1090 = 1;
} else {
fprintf(stderr,
"Unknown or not enough arguments for option '%s'.\n\n",
argv[j]);
showHelp();
exit(1);
}
}
#ifndef _WIN32
// Setup for SIGWINCH for handling lines
if (Modes.interactive) {signal(SIGWINCH, sigWinchCallback);}
#endif
// Initialization
modesInit();
if (Modes.net_only) {
fprintf(stderr,"Net-only mode, no RTL device or file open.\n");
} else if (Modes.filename == NULL) {
modesInitRTLSDR();
} else {
if (Modes.filename[0] == '-' && Modes.filename[1] == '\0') {
Modes.fd = STDIN_FILENO;
} else if ((Modes.fd = open(Modes.filename,O_RDONLY)) == -1) {
perror("Opening data file");
exit(1);
}
}
if (Modes.net) modesInitNet();
// If the user specifies --net-only, just run in order to serve network
// clients without reading data from the RTL device
while (Modes.net_only) {
if (Modes.exit) exit(0); // If we exit net_only nothing further in main()
backgroundTasks();
usleep(100000);
}
// Create the thread that will read the data from the device.
pthread_create(&Modes.reader_thread, NULL, readerThreadEntryPoint, NULL);
pthread_mutex_lock(&Modes.data_mutex);
while (Modes.exit == 0) {
if (Modes.iDataReady == 0) {
pthread_cond_wait(&Modes.data_cond,&Modes.data_mutex); // This unlocks Modes.data_mutex, and waits for Modes.data_cond
continue; // Once (Modes.data_cond) occurs, it locks Modes.data_mutex
}
// Modes.data_mutex is Locked, and (Modes.iDataReady != 0)
if (Modes.iDataReady) { // Check we have new data, just in case!!
Modes.iDataOut &= (MODES_ASYNC_BUF_NUMBER-1); // Just incase
// Translate the next lot of I/Q samples into Modes.magnitude
computeMagnitudeVector(Modes.pData[Modes.iDataOut]);
Modes.stSystemTimeBlk = Modes.stSystemTimeRTL[Modes.iDataOut];
// Update the input buffer pointer queue
Modes.iDataOut = (MODES_ASYNC_BUF_NUMBER-1) & (Modes.iDataOut + 1);
Modes.iDataReady = (MODES_ASYNC_BUF_NUMBER-1) & (Modes.iDataIn - Modes.iDataOut);
// If we lost some blocks, correct the timestamp
if (Modes.iDataLost) {
Modes.timestampBlk += (MODES_ASYNC_BUF_SAMPLES * 6 * Modes.iDataLost);
Modes.iDataLost = 0;
}
// It's safe to release the lock now
pthread_cond_signal (&Modes.data_cond);
pthread_mutex_unlock(&Modes.data_mutex);
// Process data after releasing the lock, so that the capturing
// thread can read data while we perform computationally expensive
// stuff at the same time.
detectModeS(Modes.magnitude, MODES_ASYNC_BUF_SAMPLES);
// Update the timestamp ready for the next block
Modes.timestampBlk += (MODES_ASYNC_BUF_SAMPLES*6);
} else {
pthread_cond_signal (&Modes.data_cond);
pthread_mutex_unlock(&Modes.data_mutex);
}
backgroundTasks();
pthread_mutex_lock(&Modes.data_mutex);
}
// If --stats were given, print statistics
if (Modes.stats) {
printf("\n\n");
if (Modes.interactive)
interactiveShowData();
printf("%d ModeA/C detected\n", Modes.stat_ModeAC);
printf("%d valid Mode-S preambles\n", Modes.stat_valid_preamble);
printf("%d DF-?? fields corrected for length\n", Modes.stat_DF_Len_Corrected);
printf("%d DF-?? fields corrected for type\n", Modes.stat_DF_Type_Corrected);
printf("%d demodulated with 0 errors\n", Modes.stat_demodulated0);
printf("%d demodulated with 1 error\n", Modes.stat_demodulated1);
printf("%d demodulated with 2 errors\n", Modes.stat_demodulated2);
printf("%d demodulated with > 2 errors\n", Modes.stat_demodulated3);
printf("%d with good crc\n", Modes.stat_goodcrc);
printf("%d with bad crc\n", Modes.stat_badcrc);
printf("%d errors corrected\n", Modes.stat_fixed);
for (j = 0; j < MODES_MAX_BITERRORS; j++) {
printf(" %d with %d bit %s\n", Modes.stat_bit_fix[j], j+1, (j==0)?"error":"errors");
}
if (Modes.phase_enhance) {
printf("%d phase enhancement attempts\n", Modes.stat_out_of_phase);
printf("%d phase enhanced demodulated with 0 errors\n", Modes.stat_ph_demodulated0);
printf("%d phase enhanced demodulated with 1 error\n", Modes.stat_ph_demodulated1);
printf("%d phase enhanced demodulated with 2 errors\n", Modes.stat_ph_demodulated2);
printf("%d phase enhanced demodulated with > 2 errors\n", Modes.stat_ph_demodulated3);
printf("%d phase enhanced with good crc\n", Modes.stat_ph_goodcrc);
printf("%d phase enhanced with bad crc\n", Modes.stat_ph_badcrc);
printf("%d phase enhanced errors corrected\n", Modes.stat_ph_fixed);
for (j = 0; j < MODES_MAX_BITERRORS; j++) {
printf(" %d with %d bit %s\n", Modes.stat_ph_bit_fix[j], j+1, (j==0)?"error":"errors");
}
}
printf("%d total usable messages\n", Modes.stat_goodcrc + Modes.stat_ph_goodcrc + Modes.stat_fixed + Modes.stat_ph_fixed);
}
if (Modes.filename == NULL) {
rtlsdr_cancel_async(Modes.dev); // Cancel rtlsdr_read_async will cause data input thread to terminate cleanly
rtlsdr_close(Modes.dev);
}
pthread_cond_destroy(&Modes.data_cond); // Thread cleanup
pthread_mutex_destroy(&Modes.data_mutex);
pthread_join(Modes.reader_thread,NULL); // Wait on reader thread exit
#ifndef _WIN32
pthread_exit(0);
#else
return (0);
#endif
}
//
//=========================================================================
//
int main(int argc, char **argv) {
int j;
int stdout_option = 0;
char *bo_connect_ipaddr = "127.0.0.1";
int bo_connect_port = MODES_NET_OUTPUT_BEAST_PORT;
struct client *c;
struct net_service *beast_input, *fatsv_output;
// Set sane defaults
faupInitConfig();
// Parse the command line options
for (j = 1; j < argc; j++) {
int more = j+1 < argc; // There are more arguments
if (!strcmp(argv[j],"--net-bo-port") && more) {
bo_connect_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-bo-ipaddr") && more) {
bo_connect_ipaddr = argv[++j];
} else if (!strcmp(argv[j],"--lat") && more) {
Modes.fUserLat = atof(argv[++j]);
} else if (!strcmp(argv[j],"--lon") && more) {
Modes.fUserLon = atof(argv[++j]);
} else if (!strcmp(argv[j],"--max-range") && more) {
Modes.maxRange = atof(argv[++j]) * 1852.0; // convert to metres
} else if (!strcmp(argv[j],"--help")) {
showHelp();
exit(0);
} else if (!strcmp(argv[j],"--stdout")) {
stdout_option = 1;
} else {
fprintf(stderr,
"Unknown or not enough arguments for option '%s'.\n\n",
argv[j]);
showHelp();
exit(1);
}
}
if (!stdout_option) {
fprintf(stderr,
"--stdout is required, output always goes to stdout.\n");
showHelp();
exit(1);
}
// Initialization
faupInit();
modesInitNet();
// Set up input connection
beast_input = makeBeastInputService();
c = serviceConnect(beast_input, bo_connect_ipaddr, bo_connect_port);
if (!c) {
fprintf (stderr,
"faup1090: failed to connect to %s:%d (is dump1090 running?): %s\n",
bo_connect_ipaddr, bo_connect_port, Modes.aneterr);
exit (1);
}
// Set up output connection on stdout
fatsv_output = makeFatsvOutputService();
createGenericClient(fatsv_output, STDOUT_FILENO);
// Run it until we've lost either connection
while (!Modes.exit && beast_input->connections && fatsv_output->connections) {
backgroundTasks();
usleep(100000);
}
return 0;
}
//
//=========================================================================
//
int main(int argc, char **argv) {
int j;
// Set sane defaults
modesInitConfig();
// signal handlers:
signal(SIGINT, sigintHandler);
signal(SIGTERM, sigtermHandler);
// Parse the command line options
for (j = 1; j < argc; j++) {
int more = j+1 < argc; // There are more arguments
if (!strcmp(argv[j],"--device-index") && more) {
Modes.dev_name = strdup(argv[++j]);
} else if (!strcmp(argv[j],"--gain") && more) {
Modes.gain = (int) (atof(argv[++j])*10); // Gain is in tens of DBs
} else if (!strcmp(argv[j],"--enable-agc")) {
Modes.enable_agc++;
} else if (!strcmp(argv[j],"--freq") && more) {
Modes.freq = (int) strtoll(argv[++j],NULL,10);
} else if (!strcmp(argv[j],"--ifile") && more) {
Modes.filename = strdup(argv[++j]);
} else if (!strcmp(argv[j],"--iformat") && more) {
++j;
if (!strcasecmp(argv[j], "uc8")) {
Modes.input_format = INPUT_UC8;
} else if (!strcasecmp(argv[j], "sc16")) {
Modes.input_format = INPUT_SC16;
} else if (!strcasecmp(argv[j], "sc16q11")) {
Modes.input_format = INPUT_SC16Q11;
} else {
fprintf(stderr, "Input format '%s' not understood (supported values: UC8, SC16, SC16Q11)\n",
argv[j]);
exit(1);
}
} else if (!strcmp(argv[j],"--dcfilter")) {
Modes.dc_filter = 1;
} else if (!strcmp(argv[j],"--measure-noise")) {
Modes.measure_noise = 1;
} else if (!strcmp(argv[j],"--fix")) {
Modes.nfix_crc = 1;
} else if (!strcmp(argv[j],"--no-fix")) {
Modes.nfix_crc = 0;
} else if (!strcmp(argv[j],"--no-crc-check")) {
Modes.check_crc = 0;
} else if (!strcmp(argv[j],"--phase-enhance")) {
Modes.phase_enhance = 1;
} else if (!strcmp(argv[j],"--raw")) {
Modes.raw = 1;
} else if (!strcmp(argv[j],"--net")) {
Modes.net = 1;
} else if (!strcmp(argv[j],"--modeac")) {
Modes.mode_ac = 1;
} else if (!strcmp(argv[j],"--net-beast")) {
Modes.beast = 1;
} else if (!strcmp(argv[j],"--net-only")) {
Modes.net = 1;
Modes.net_only = 1;
} else if (!strcmp(argv[j],"--net-heartbeat") && more) {
Modes.net_heartbeat_interval = (uint64_t)(1000 * atof(argv[++j]));
} else if (!strcmp(argv[j],"--net-ro-size") && more) {
Modes.net_output_flush_size = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-ro-rate") && more) {
Modes.net_output_flush_interval = 1000 * atoi(argv[++j]) / 15; // backwards compatibility
} else if (!strcmp(argv[j],"--net-ro-interval") && more) {
Modes.net_output_flush_interval = (uint64_t)(1000 * atof(argv[++j]));
} else if (!strcmp(argv[j],"--net-ro-port") && more) {
if (Modes.beast) // Required for legacy backward compatibility
{Modes.net_output_beast_port = atoi(argv[++j]);;}
else
{Modes.net_output_raw_port = atoi(argv[++j]);}
} else if (!strcmp(argv[j],"--net-ri-port") && more) {
Modes.net_input_raw_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-bo-port") && more) {
Modes.net_output_beast_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-bi-port") && more) {
Modes.net_input_beast_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-bind-address") && more) {
Modes.net_bind_address = strdup(argv[++j]);
} else if (!strcmp(argv[j],"--net-http-port") && more) {
Modes.net_http_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-fatsv-port") && more) {
Modes.net_fatsv_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-sbs-port") && more) {
Modes.net_output_sbs_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-buffer") && more) {
Modes.net_sndbuf_size = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-verbatim")) {
Modes.net_verbatim = 1;
} else if (!strcmp(argv[j],"--forward-mlat")) {
Modes.forward_mlat = 1;
} else if (!strcmp(argv[j],"--onlyaddr")) {
Modes.onlyaddr = 1;
} else if (!strcmp(argv[j],"--metric")) {
Modes.metric = 1;
} else if (!strcmp(argv[j],"--aggressive")) {
Modes.nfix_crc = MODES_MAX_BITERRORS;
} else if (!strcmp(argv[j],"--interactive")) {
Modes.interactive = Modes.throttle = 1;
} else if (!strcmp(argv[j],"--throttle")) {
Modes.throttle = 1;
} else if (!strcmp(argv[j],"--interactive-rows") && more) {
Modes.interactive_rows = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--interactive-ttl") && more) {
Modes.interactive_display_ttl = (uint64_t)(1000 * atof(argv[++j]));
} else if (!strcmp(argv[j],"--lat") && more) {
Modes.fUserLat = atof(argv[++j]);
} else if (!strcmp(argv[j],"--lon") && more) {
Modes.fUserLon = atof(argv[++j]);
} else if (!strcmp(argv[j],"--max-range") && more) {
Modes.maxRange = atof(argv[++j]) * 1852.0; // convert to metres
} else if (!strcmp(argv[j],"--debug") && more) {
char *f = argv[++j];
while(*f) {
switch(*f) {
case 'D': Modes.debug |= MODES_DEBUG_DEMOD; break;
case 'd': Modes.debug |= MODES_DEBUG_DEMODERR; break;
case 'C': Modes.debug |= MODES_DEBUG_GOODCRC; break;
case 'c': Modes.debug |= MODES_DEBUG_BADCRC; break;
case 'p': Modes.debug |= MODES_DEBUG_NOPREAMBLE; break;
case 'n': Modes.debug |= MODES_DEBUG_NET; break;
case 'j': Modes.debug |= MODES_DEBUG_JS; break;
default:
fprintf(stderr, "Unknown debugging flag: %c\n", *f);
exit(1);
break;
}
f++;
}
} else if (!strcmp(argv[j],"--stats")) {
if (!Modes.stats)
Modes.stats = (uint64_t)1 << 60; // "never"
} else if (!strcmp(argv[j],"--stats-range")) {
Modes.stats_range_histo = 1;
} else if (!strcmp(argv[j],"--stats-every") && more) {
Modes.stats = (uint64_t) (1000 * atof(argv[++j]));
} else if (!strcmp(argv[j],"--snip") && more) {
snipMode(atoi(argv[++j]));
exit(0);
} else if (!strcmp(argv[j],"--help")) {
showHelp();
exit(0);
} else if (!strcmp(argv[j],"--ppm") && more) {
Modes.ppm_error = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--quiet")) {
Modes.quiet = 1;
} else if (!strcmp(argv[j],"--show-only") && more) {
Modes.show_only = (uint32_t) strtoul(argv[++j], NULL, 16);
} else if (!strcmp(argv[j],"--mlat")) {
Modes.mlat = 1;
} else if (!strcmp(argv[j],"--interactive-rtl1090")) {
Modes.interactive = 1;
Modes.interactive_rtl1090 = 1;
} else if (!strcmp(argv[j],"--oversample")) {
Modes.oversample = 1;
#ifndef _WIN32
} else if (!strcmp(argv[j], "--write-json") && more) {
Modes.json_dir = strdup(argv[++j]);
} else if (!strcmp(argv[j], "--write-json-every") && more) {
Modes.json_interval = (uint64_t)(1000 * atof(argv[++j]));
if (Modes.json_interval < 100) // 0.1s
Modes.json_interval = 100;
} else if (!strcmp(argv[j], "--json-location-accuracy") && more) {
Modes.json_location_accuracy = atoi(argv[++j]);
#endif
} else {
fprintf(stderr,
"Unknown or not enough arguments for option '%s'.\n\n",
argv[j]);
showHelp();
exit(1);
}
}
#ifndef _WIN32
// Setup for SIGWINCH for handling lines
if (Modes.interactive) {signal(SIGWINCH, sigWinchCallback);}
#endif
if (Modes.mode_ac && Modes.oversample) {
fprintf(stderr,
"Warning: --modeac is currently ignored when --oversample is used;\n"
" no ModeA/C messages will be decoded.\n");
}
// Initialization
log_with_timestamp("%s %s starting up.", MODES_DUMP1090_VARIANT, MODES_DUMP1090_VERSION);
modesInit();
if (Modes.net_only) {
fprintf(stderr,"Net-only mode, no RTL device or file open.\n");
} else if (Modes.filename == NULL) {
if (modesInitRTLSDR() < 0) {
exit(1);
}
} else {
if (Modes.filename[0] == '-' && Modes.filename[1] == '\0') {
Modes.fd = STDIN_FILENO;
} else if ((Modes.fd = open(Modes.filename,
#ifdef _WIN32
(O_RDONLY | O_BINARY)
#else
(O_RDONLY)
#endif
)) == -1) {
perror("Opening data file");
exit(1);
}
}
if (Modes.net) modesInitNet();
// init stats:
Modes.stats_current.start = Modes.stats_current.end =
Modes.stats_alltime.start = Modes.stats_alltime.end =
Modes.stats_periodic.start = Modes.stats_periodic.end =
Modes.stats_5min.start = Modes.stats_5min.end =
Modes.stats_15min.start = Modes.stats_15min.end = mstime();
for (j = 0; j < 15; ++j)
Modes.stats_1min[j].start = Modes.stats_1min[j].end = Modes.stats_current.start;
// write initial json files so they're not missing
writeJsonToFile("receiver.json", generateReceiverJson);
writeJsonToFile("stats.json", generateStatsJson);
writeJsonToFile("aircraft.json", generateAircraftJson);
// If the user specifies --net-only, just run in order to serve network
// clients without reading data from the RTL device
if (Modes.net_only) {
while (!Modes.exit) {
struct timespec start_time;
start_cpu_timing(&start_time);
backgroundTasks();
end_cpu_timing(&start_time, &Modes.stats_current.background_cpu);
usleep(100000);
}
} else {
// Create the thread that will read the data from the device.
pthread_mutex_lock(&Modes.data_mutex);
pthread_create(&Modes.reader_thread, NULL, readerThreadEntryPoint, NULL);
while (Modes.exit == 0) {
struct timespec start_time;
if (Modes.first_free_buffer == Modes.first_filled_buffer) {
/* wait for more data.
* we should be getting data every 50-60ms. wait for max 100ms before we give up and do some background work.
* this is fairly aggressive as all our network I/O runs out of the background work!
*/
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
ts.tv_nsec += 100000000;
normalize_timespec(&ts);
pthread_cond_timedwait(&Modes.data_cond, &Modes.data_mutex, &ts); // This unlocks Modes.data_mutex, and waits for Modes.data_cond
}
// Modes.data_mutex is locked, and possibly we have data.
// copy out reader CPU time and reset it
add_timespecs(&Modes.reader_cpu_accumulator, &Modes.stats_current.reader_cpu, &Modes.stats_current.reader_cpu);
Modes.reader_cpu_accumulator.tv_sec = 0;
Modes.reader_cpu_accumulator.tv_nsec = 0;
if (Modes.first_free_buffer != Modes.first_filled_buffer) {
// FIFO is not empty, process one buffer.
struct mag_buf *buf;
start_cpu_timing(&start_time);
buf = &Modes.mag_buffers[Modes.first_filled_buffer];
// Process data after releasing the lock, so that the capturing
// thread can read data while we perform computationally expensive
// stuff at the same time.
pthread_mutex_unlock(&Modes.data_mutex);
if (Modes.oversample) {
demodulate2400(buf);
} else {
demodulate2000(buf);
}
Modes.stats_current.samples_processed += buf->length;
Modes.stats_current.samples_dropped += buf->dropped;
end_cpu_timing(&start_time, &Modes.stats_current.demod_cpu);
// Mark the buffer we just processed as completed.
pthread_mutex_lock(&Modes.data_mutex);
Modes.first_filled_buffer = (Modes.first_filled_buffer + 1) % MODES_MAG_BUFFERS;
pthread_cond_signal(&Modes.data_cond);
pthread_mutex_unlock(&Modes.data_mutex);
} else {
// Nothing to process this time around.
pthread_mutex_unlock(&Modes.data_mutex);
}
start_cpu_timing(&start_time);
backgroundTasks();
end_cpu_timing(&start_time, &Modes.stats_current.background_cpu);
pthread_mutex_lock(&Modes.data_mutex);
}
pthread_mutex_unlock(&Modes.data_mutex);
pthread_join(Modes.reader_thread,NULL); // Wait on reader thread exit
pthread_cond_destroy(&Modes.data_cond); // Thread cleanup - only after the reader thread is dead!
pthread_mutex_destroy(&Modes.data_mutex);
}
// If --stats were given, print statistics
if (Modes.stats) {
display_total_stats();
}
cleanup_converter(Modes.converter_state);
log_with_timestamp("Normal exit.");
pthread_exit(0);
#ifdef _WIN32
return (0);
#endif
}