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sdr.c
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sdr.c
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// Part of dump1090, a Mode S message decoder for RTLSDR devices.
//
// sdr.c: generic SDR infrastructure
//
// Copyright (c) 2016-2017 Oliver Jowett <[email protected]>
// Copyright (c) 2017 FlightAware LLC
//
// This file is free software: you may copy, redistribute and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation, either version 2 of the License, or (at your
// option) any later version.
//
// This file is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "dump1090.h"
#include "sdr_ifile.h"
#ifdef ENABLE_RTLSDR
# include "sdr_rtlsdr.h"
#endif
#ifdef ENABLE_BLADERF
# include "sdr_bladerf.h"
#endif
#ifdef ENABLE_HACKRF
# include "sdr_hackrf.h"
#endif
#ifdef ENABLE_LIMESDR
# include "sdr_limesdr.h"
#endif
#ifdef ENABLE_SOAPYSDR
# include "sdr_soapy.h"
#endif
typedef struct {
const char *name;
sdr_type_t sdr_type;
void (*initConfig)();
void (*showHelp)();
bool (*handleOption)(int, char**, int*);
bool (*open)();
void (*run)();
void (*stop)();
void (*close)();
int (*getgain)();
int (*getmaxgain)();
double (*getgaindb)(int);
int (*setgain)(int);
} sdr_handler;
static void noInitConfig()
{
}
static void noShowHelp()
{
}
static bool noHandleOption(int argc, char **argv, int *jptr)
{
MODES_NOTUSED(argc);
MODES_NOTUSED(argv);
MODES_NOTUSED(jptr);
return false;
}
static bool noOpen()
{
fprintf(stderr, "Net-only mode, no SDR device or file open.\n");
return true;
}
static void noRun()
{
}
static void noStop()
{
}
static void noClose()
{
}
static int noGetGain()
{
return -1;
}
static int noGetMaxGain()
{
return -1;
}
static double noGetGainDb(int step)
{
MODES_NOTUSED(step);
return 0.0;
}
static int noSetGain(int step)
{
MODES_NOTUSED(step);
return 0;
}
static bool unsupportedOpen()
{
fprintf(stderr, "Support for this SDR type was not enabled in this build.\n");
return false;
}
static sdr_handler sdr_handlers[] = {
#ifdef ENABLE_RTLSDR
{ "rtlsdr", SDR_RTLSDR, rtlsdrInitConfig, rtlsdrShowHelp, rtlsdrHandleOption, rtlsdrOpen, rtlsdrRun, rtlsdrStop, rtlsdrClose, rtlsdrGetGain, rtlsdrGetMaxGain, rtlsdrGetGainDb, rtlsdrSetGain },
#endif
#ifdef ENABLE_BLADERF
{ "bladerf", SDR_BLADERF, bladeRFInitConfig, bladeRFShowHelp, bladeRFHandleOption, bladeRFOpen, bladeRFRun, noStop, bladeRFClose, noGetGain, noGetMaxGain, noGetGainDb, noSetGain },
#endif
#ifdef ENABLE_HACKRF
{ "hackrf", SDR_HACKRF, hackRFInitConfig, hackRFShowHelp, hackRFHandleOption, hackRFOpen, hackRFRun, noStop, hackRFClose, noGetGain, noGetMaxGain, noGetGainDb, noSetGain },
#endif
#ifdef ENABLE_LIMESDR
{ "limesdr", SDR_LIMESDR, limesdrInitConfig, limesdrShowHelp, limesdrHandleOption, limesdrOpen, limesdrRun, noStop, limesdrClose, noGetGain, noGetMaxGain, noGetGainDb, noSetGain },
#endif
#ifdef ENABLE_SOAPYSDR
{ "soapy", SDR_SOAPYSDR, soapyInitConfig, soapyShowHelp, soapyHandleOption, soapyOpen, soapyRun, noStop, soapyClose, soapyGetGain, soapyGetMaxGain, soapyGetGainDb, soapySetGain },
#endif
{ "none", SDR_NONE, noInitConfig, noShowHelp, noHandleOption, noOpen, noRun, noStop, noClose, noGetGain, noGetMaxGain, noGetGainDb, noSetGain },
{ "ifile", SDR_IFILE, ifileInitConfig, ifileShowHelp, ifileHandleOption, ifileOpen, ifileRun, noStop, ifileClose, noGetGain, noGetMaxGain, noGetGainDb, noSetGain },
{ NULL, SDR_NONE, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL } /* must come last */
};
void sdrInitConfig()
{
// Default SDR is the first type available in the handlers array.
Modes.sdr_type = sdr_handlers[0].sdr_type;
for (int i = 0; sdr_handlers[i].name; ++i) {
sdr_handlers[i].initConfig();
}
}
void sdrShowHelp()
{
printf("--device-type <type> Select SDR type (default: %s)\n", sdr_handlers[0].name);
printf("\n");
for (int i = 0; sdr_handlers[i].name; ++i) {
sdr_handlers[i].showHelp();
}
}
bool sdrHandleOption(int argc, char **argv, int *jptr)
{
int j = *jptr;
if (!strcmp(argv[j], "--device-type")) {
if ((j+1) < argc) {
++j;
for (int i = 0; sdr_handlers[i].name; ++i) {
if (!strcasecmp(sdr_handlers[i].name, argv[j])) {
Modes.sdr_type = sdr_handlers[i].sdr_type;
*jptr = j;
return true;
}
}
fprintf(stderr, "SDR type '%s' not recognized. ", argv[j]);
}
fprintf(stderr, "Supported SDR types:\n");
for (int i = 0; sdr_handlers[i].name; ++i) {
fprintf(stderr, " %s\n", sdr_handlers[i].name);
}
return false;
}
for (int i = 0; sdr_handlers[i].name; ++i) {
if (sdr_handlers[i].handleOption(argc, argv, jptr))
return true;
}
return false;
}
static sdr_handler *current_handler()
{
static sdr_handler unsupported_handler = { "unsupported", SDR_NONE, noInitConfig, noShowHelp, noHandleOption, unsupportedOpen, noRun, noStop, noClose, noGetGain, noGetMaxGain, noGetGainDb, noSetGain };
for (int i = 0; sdr_handlers[i].name; ++i) {
if (Modes.sdr_type == sdr_handlers[i].sdr_type) {
return &sdr_handlers[i];
}
}
return &unsupported_handler;
}
bool sdrOpen()
{
pthread_mutex_init(&Modes.reader_cpu_mutex, NULL);
return current_handler()->open();
}
void sdrRun()
{
set_thread_name("dump1090-sdr");
pthread_mutex_lock(&Modes.reader_cpu_mutex);
Modes.reader_cpu_accumulator.tv_sec = 0;
Modes.reader_cpu_accumulator.tv_nsec = 0;
start_cpu_timing(&Modes.reader_cpu_start);
pthread_mutex_unlock(&Modes.reader_cpu_mutex);
current_handler()->run();
pthread_mutex_lock(&Modes.reader_cpu_mutex);
end_cpu_timing(&Modes.reader_cpu_start, &Modes.reader_cpu_accumulator);
pthread_mutex_unlock(&Modes.reader_cpu_mutex);
}
void sdrStop()
{
current_handler()->stop();
}
void sdrClose()
{
pthread_mutex_destroy(&Modes.reader_cpu_mutex);
current_handler()->close();
}
void sdrMonitor()
{
pthread_mutex_lock(&Modes.reader_cpu_mutex);
update_cpu_timing(&Modes.reader_cpu_start, &Modes.reader_cpu_accumulator);
pthread_mutex_unlock(&Modes.reader_cpu_mutex);
}
void sdrUpdateCPUTime(struct timespec *addTo)
{
pthread_mutex_lock(&Modes.reader_cpu_mutex);
add_timespecs(&Modes.reader_cpu_accumulator, addTo, addTo);
Modes.reader_cpu_accumulator.tv_sec = 0;
Modes.reader_cpu_accumulator.tv_nsec = 0;
pthread_mutex_unlock(&Modes.reader_cpu_mutex);
}
int sdrGetGain()
{
return current_handler()->getgain();
}
int sdrGetMaxGain()
{
return current_handler()->getmaxgain();
}
double sdrGetGainDb(int step)
{
return current_handler()->getgaindb(step);
}
int sdrSetGain(int step)
{
return current_handler()->setgain(step);
}