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sdrplayd.c
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sdrplayd.c
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// Read from SDRplay SDR using SDRplay API version 3.x
// Accept control commands from UDP socket
// Written by K4VZ July 2020, adapted from existing KA9Q SDR handler programs
#define _GNU_SOURCE 1
#include <assert.h>
#include <pthread.h>
#include <string.h>
#if defined(linux)
#include <bsd/string.h>
#endif
#include <complex.h>
#include <math.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <signal.h>
#include <locale.h>
#include <sys/time.h>
#include <sdrplay_api.h>
#include <sys/resource.h>
#include <errno.h>
#include <syslog.h>
#include <sys/stat.h>
#include <getopt.h>
#include <iniparser.h>
#include "conf.h"
#include "misc.h"
#include "multicast.h"
#include "decimate.h"
#include "status.h"
#include "config.h"
// Configurable parameters
// decibel limits for power
float const AGC_upper = -20;
float const AGC_lower = -50;
int const Bufsize = 65536; // should pick more deterministically
#define BUFFERSIZE (1<<21) // Upcalls seem to be 256KB; don't make too big or we may blow out of the cache
// Global variables set by config file options
char const *Iface;
char *Locale;
int RTP_ttl;
int Status_ttl;
int IP_tos;
const char *App_path;
int Verbose;
static int Terminate;
// SDRplay device status
enum sdrplay_status {
NOT_INITIALIZED = 0,
SDRPLAY_API_OPEN = 1,
DEVICE_API_LOCKED = 2,
DEVICE_SELECTED = 4,
DEVICE_STREAMING = 8
};
struct sdrstate {
sdrplay_api_DeviceT device;
sdrplay_api_DeviceParamsT *device_params;
sdrplay_api_RxChannelParamsT *rx_channel_params;
enum sdrplay_status device_status;
char const *description;
// Tuning
int frequency_lock;
char *frequency_file; // Local file to store frequency in case we restart
// Sample statistics
uint64_t sample_count;
uint64_t event_count;
int clips; // Sample clips since last reset (???)
float power; // Running estimate of A/D signal power (???)
unsigned int next_sample_num;
int blocksize;// Number of samples per packet
complex int16_t *samples; // samples buffer
FILE *status; // Real-time display in /run (currently unused)
// Multicast I/O
char const *metadata_dest;
struct sockaddr_storage output_metadata_dest_address;
uint64_t output_metadata_packets;
int status_sock; // Socket handle for outgoing status messages
int nctl_sock; // Socket handle for incoming commands (same socket as status)
uint64_t commands; // Command counter
uint32_t command_tag; // Last received command tag
char const *data_dest;
struct sockaddr_storage output_data_source_address; // Multicast output socket
struct sockaddr_storage output_data_dest_address; // Multicast output socket
int data_sock; // Socket handle for sending real time stream
struct rtp_state rtp; // Real time protocol (RTP) state
int rtp_type; // RTP type to indicate sample rate, etc (should be rethought)
pthread_t display_thread;
pthread_t ncmd_thread;
};
static struct option Options[] =
{
{"verbose", no_argument, NULL, 'v'},
{"config",required_argument,NULL,'f'},
{NULL, 0, NULL, 0},
};
static char const Optstring[] = "f:v";
// SDRplay specific constants, data structures, and functions
static const sdrplay_api_DbgLvl_t dbgLvl = sdrplay_api_DbgLvl_Disable;
//static const sdrplay_api_DbgLvl_t dbgLvl = sdrplay_api_DbgLvl_Verbose;
static const double MIN_SAMPLE_RATE = 2e6;
static const double MAX_SAMPLE_RATE = 10.66e6;
static const int MAX_DECIMATION = 32;
// Taken from SDRplay API Specification Guide (Gain Reduction Tables)
uint8_t rsp1_0_420_lna_states[] = { 0, 24, 19, 43 };
uint8_t rsp1_420_1000_lna_states[] = { 0, 7, 19, 26 };
uint8_t rsp1_1000_2000_lna_states[] = { 0, 5, 19, 24 };
uint8_t rsp1a_0_60_lna_states[] = { 0, 6, 12, 18, 37, 42, 61 };
uint8_t rsp1a_60_420_lna_states[] = { 0, 6, 12, 18, 20, 26, 32, 38, 57, 62 };
uint8_t rsp1a_420_1000_lna_states[] = { 0, 7, 13, 19, 20, 27, 33, 39, 45, 64 };
uint8_t rsp1a_1000_2000_lna_states[] = { 0, 6, 12, 20, 26, 32, 38, 43, 62 };
uint8_t rsp2_0_420_lna_states[] = { 0, 10, 15, 21, 24, 34, 39, 45, 64 };
uint8_t rsp2_420_1000_lna_states[] = { 0, 7, 10, 17, 22, 41 };
uint8_t rsp2_1000_2000_lna_states[] = { 0, 5, 21, 15, 15, 34 };
uint8_t rsp2_0_60_hiz_lna_states[] = { 0, 6, 12, 18, 37 };
uint8_t rspduo_0_60_lna_states[] = { 0, 6, 12, 18, 37, 42, 61 };
uint8_t rspduo_60_420_lna_states[] = { 0, 6, 12, 18, 20, 26, 32, 38, 57, 62 };
uint8_t rspduo_420_1000_lna_states[] = { 0, 7, 13, 19, 20, 27, 33, 39, 45, 64 };
uint8_t rspduo_1000_2000_lna_states[] = { 0, 6, 12, 20, 26, 32, 38, 43, 62 };
uint8_t rspduo_0_60_hiz_lna_states[] = { 0, 6, 12, 18, 37 };
uint8_t rspdx_0_2_hdr_lna_states[] = { 0, 3, 6, 9, 12, 15, 18, 21, 24, 25, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60 };
uint8_t rspdx_0_12_lna_states[] = { 0, 3, 6, 9, 12, 15, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60 };
uint8_t rspdx_12_60_lna_states[] = { 0, 3, 6, 9, 12, 15, 18, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60 };
uint8_t rspdx_60_250_lna_states[] = { 0, 3, 6, 9, 12, 15, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84 };
uint8_t rspdx_250_420_lna_states[] = { 0, 3, 6, 9, 12, 15, 18, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84 };
uint8_t rspdx_420_1000_lna_states[] = { 0, 7, 10, 13, 16, 19, 22, 25, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58, 61, 64, 67 };
uint8_t rspdx_1000_2000_lna_states[] = { 0, 5, 8, 11, 14, 17, 20, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65 };
// SDRplay specific functions
static int init_api(struct sdrstate *sdr);
static int find_rsp(struct sdrstate *sdr,char const *sn);
static int set_rspduo_mode(struct sdrstate *sdr,char const *mode,char const *antenna);
static int select_device(struct sdrstate *sdr);
static int set_center_freq(struct sdrstate *sdr,double const frequency);
static int set_ifreq(struct sdrstate *sdr,int const ifreq);
static int set_bandwidth(struct sdrstate *sdr,int const bandwidth,double const samprate);
static int set_samplerate(struct sdrstate *sdr,double const samprate);
static double get_samplerate(struct sdrstate *sdr);
static int set_antenna(struct sdrstate *sdr,char const *antenna);
static int set_rf_gain(struct sdrstate *sdr,int const lna_state,int const rf_att,int const rf_gr,double const frequency);
static int set_if_gain(struct sdrstate *sdr,int const if_att,int const if_gr,int const if_agc,int const if_agc_rate,int const if_agc_setPoint_dBfs,int const if_agc_attack_ms,int const if_agc_decay_ms,int const if_agc_decay_delay_ms,int const if_agc_decay_threshold_dB);
static int set_dc_offset_iq_imbalance_correction(struct sdrstate *sdr,int const dc_offset_corr,int const iq_imbalance_corr);
static int set_bulk_transfer_mode(struct sdrstate *sdr,int const transfer_mode_bulk);
static int set_notch_filters(struct sdrstate *sdr,int const rf_notch,int const dab_notch,int const am_notch);
static int set_biasT(struct sdrstate *sdr,int const biasT);
static int start_streaming(struct sdrstate *sdr);
static void rx_callback(int16_t *xi,int16_t *xq,sdrplay_api_StreamCbParamsT *params,unsigned int numSamples,unsigned int reset,void *cbContext);
static void event_callback(sdrplay_api_EventT eventId,sdrplay_api_TunerSelectT tuner,sdrplay_api_EventParamsT *params,void *cbContext);
static void show_device_params(struct sdrstate *sdr);
static void close_and_exit(struct sdrstate *sdr,int exit_code);
static void set_terminate(int a);
// handle commands, display status, and ka9q-radio related functions
static void decode_sdrplay_commands(struct sdrstate *,uint8_t *,int);
static void send_sdrplay_status(struct sdrstate *,int);
static void *display(void *);
static void *ncmd(void *);
dictionary *Dictionary;
char const *Name;
char const *Conf_file;
int main(int argc,char *argv[]){
App_path = argv[0];
umask(02);
#if 0
// Dump environment variables
extern char **environ;
for(int i=0;;i++){
if(environ[i])
printf("environ[%'d]: %s\n",i,environ[i]);
else
break;
}
#endif
struct sdrstate * const sdr = (struct sdrstate *)calloc(1,sizeof(struct sdrstate));
sdr->device_status = NOT_INITIALIZED;
sdr->samples = NULL;
sdr->rtp_type = IQ_PT;
Locale = getenv("LANG");
if(Locale == NULL || strlen(Locale) == 0)
Locale = "en_US.UTF-8";
setlocale(LC_ALL,Locale);
setlinebuf(stdout);
int c;
double init_frequency = 0;
while((c = getopt_long(argc,argv,Optstring,Options,NULL)) != -1){
switch(c){
case 'f':
Conf_file = optarg;
break;
case 'v':
Verbose++;
break;
default:
case '?':
fprintf(stdout,"Unknown argument %c\n",c);
break;
}
}
if(optind >= argc){
fprintf(stdout,"Name missing\n");
fprintf(stdout,"Usage: %s [-v] [-f config_file] instance_name\n",argv[0]);
exit(1);
}
Name = argv[optind];
// Process config files
if(Conf_file){
// If this fails, don't fall back to any of the defaults
if((Dictionary = iniparser_load(Conf_file)) == NULL){
fprintf(stdout,"Can't load config file %s\n",Conf_file);
exit(1);
}
if(iniparser_find_entry(Dictionary,Name) != 1){
fprintf(stdout,"No section %s found in %s\n",Name,Conf_file);
iniparser_freedict(Dictionary);
exit(1);
}
} else if((Dictionary = iniparser_load("/etc/radio/sdrplayd.conf")) != NULL){
if(iniparser_find_entry(Dictionary,Name) == 1){
printf("Using config file /etc/radio/sdrplayd.conf\n");
} else {
iniparser_freedict(Dictionary);
Dictionary = NULL;
}
}
if(Dictionary == NULL){
// Search everything under /etc/radio/sdrplayd.conf.d
char const *subdir = "/etc/radio/sdrplayd.conf.d";
DIR *dir = opendir(subdir);
if(dir != NULL){
struct dirent const *dp;
while((dp = readdir(dir)) != NULL){
if(dp->d_type != DT_REG)
continue;
int len = strlen(dp->d_name);
if(len < 5)
continue;
if(strcmp(&dp->d_name[len-5],".conf") != 0)
continue; // Name doesn't end in .conf
char path[PATH_MAX];
// Checking the return value suppresses a (bogus) gcc warning
// about possibly truncating the target. We know it can't
// beecause dp->d_name is 256 chars
int ret = snprintf(path,sizeof(path),"%s/%s",subdir,dp->d_name);
if(ret > sizeof(path))
continue; // bogus entry?
if((Dictionary = iniparser_load(path)) != NULL){
if(iniparser_find_entry(Dictionary,Name) == 1){
printf("Using config file %s section %s\n",path,Name);
break;
} else {
iniparser_freedict(Dictionary);
Dictionary = NULL;
}
}
}
closedir(dir);
dir = NULL;
}
}
if(Dictionary == NULL){
fprintf(stdout,"section %s not found in any config file\n",Name);
exit(1);
}
if(init_api(sdr) == -1)
close_and_exit(sdr,1);
char const *sn = config_getstring(Dictionary,Name,"serial",NULL);
if(sn == NULL){
fprintf(stdout,"'serial' not defined in section %s\n",Name);
close_and_exit(sdr,1);
}
// Serial number specified, find that one
if(find_rsp(sdr,sn) == -1)
close_and_exit(sdr,1);
if(sdr->device.hwVer == SDRPLAY_RSPduo_ID){
char const *mode = config_getstring(Dictionary,Name,"rspduo-mode",NULL);
char const *antenna = config_getstring(Dictionary,Name,"antenna",NULL);
if(set_rspduo_mode(sdr,mode,antenna) == -1)
close_and_exit(sdr,1);
}
if(select_device(sdr) == -1)
close_and_exit(sdr,1);
int const ifreq = config_getint(Dictionary,Name,"ifreq",-1);
if(set_ifreq(sdr,ifreq) == -1)
close_and_exit(sdr,1);
// Default sample rate to 2Msps
int const bandwidth = config_getint(Dictionary,Name,"bandwidth",-1);
double const samprate = config_getdouble(Dictionary,Name,"samprate",MIN_SAMPLE_RATE);
if(set_bandwidth(sdr,bandwidth,samprate) == -1)
close_and_exit(sdr,1);
fprintf(stdout,"Set sample rate %'f Hz\n",samprate);
if(set_samplerate(sdr,samprate) == -1)
close_and_exit(sdr,1);
{
// Multicast output interface for both data and status
Iface = config_getstring(Dictionary,Name,"iface",NULL);
sdr->data_dest = config_getstring(Dictionary,Name,"data",NULL);
// Set up output sockets
if(sdr->data_dest == NULL){
// Construct from serial number
// Technically creates a memory leak since we never free it, but it's only once per run
char *cp;
int ret = asprintf(&cp,"sdrplay-%s-pcm.local",sdr->device.SerNo);
if(ret == -1)
close_and_exit(sdr,1);
sdr->data_dest = cp;
}
sdr->metadata_dest = config_getstring(Dictionary,Name,"status",NULL);
if(sdr->metadata_dest == NULL){
// Construct from serial number
// Technically creates a memory leak since we never free it, but it's only once per run
char *cp;
int ret = asprintf(&cp,"sdrplay-%s-status.local",sdr->device.SerNo);
if(ret == -1)
close_and_exit(sdr,1);
sdr->metadata_dest = cp;
}
}
// Need to know the initial frequency beforehand because of RF att/LNA state
init_frequency = config_getdouble(Dictionary,Name,"frequency",0);
if(init_frequency != 0)
sdr->frequency_lock = 1;
if(asprintf(&sdr->frequency_file,"%s/tune-sdrplay.%s",VARDIR,sdr->device.SerNo) == -1)
close_and_exit(sdr,1);
if(init_frequency == 0){
// If not set on command line, load saved frequency
FILE *fp = fopen(sdr->frequency_file,"r+");
if(fp == NULL)
fprintf(stderr,"Can't open tuner state file %s: %s\n",sdr->frequency_file,strerror(errno));
else {
fprintf(stderr,"Using tuner state file %s\n",sdr->frequency_file);
int r;
if((r = fscanf(fp,"%lf",&init_frequency)) < 0)
fprintf(stderr,"Can't read stored freq. r = %'d: %s\n",r,strerror(errno));
fclose(fp);
}
}
if(init_frequency == 0){
// Not set on command line, and not read from file. Use fallback to cover 2m
init_frequency = 149e6; // Fallback default
fprintf(stderr,"Fallback default frequency %'.3lf Hz\n",init_frequency);
}
// Hardware device settings
{
char const *antenna = config_getstring(Dictionary,Name,"antenna",NULL);
if(set_antenna(sdr,antenna) == -1)
close_and_exit(sdr,1);
int const lna_state = config_getint(Dictionary,Name,"lna-state",-1);
int const rf_att = config_getint(Dictionary,Name,"rf-att",-1);
int const rf_gr = config_getint(Dictionary,Name,"rf-gr",-1);
if(set_rf_gain(sdr,lna_state,rf_att,rf_gr,init_frequency) == -1)
close_and_exit(sdr,1);
int const if_att = config_getint(Dictionary,Name,"if-att",-1);
int const if_gr = config_getint(Dictionary,Name,"if-gr",-1);
int const if_agc = config_getboolean(Dictionary,Name,"if-agc",0); // default off
int const if_agc_rate = config_getint(Dictionary,Name,"if-agc-rate",-1);
int const if_agc_setPoint_dBfs = config_getint(Dictionary,Name,"if-agc-setpoint-dbfs",-60);
int const if_agc_attack_ms = config_getint(Dictionary,Name,"if-agc-attack-ms",0);
int const if_agc_decay_ms = config_getint(Dictionary,Name,"if-agc-decay-ms",0);
int const if_agc_decay_delay_ms = config_getint(Dictionary,Name,"if-agc-decay-delay-ms",0);
int const if_agc_decay_threshold_dB = config_getint(Dictionary,Name,"if-agc-decay-threshold-db",0);
if(set_if_gain(sdr,if_att,if_gr,if_agc,if_agc_rate,if_agc_setPoint_dBfs,if_agc_attack_ms,if_agc_decay_ms,if_agc_decay_delay_ms,if_agc_decay_threshold_dB) == -1)
close_and_exit(sdr,1);
fprintf(stdout,"RF LNA state %d, IF att %d, IF AGC %d, IF AGC setPoint %d\n",
(int)(sdr->rx_channel_params->tunerParams.gain.LNAstate),
sdr->rx_channel_params->tunerParams.gain.gRdB,
sdr->rx_channel_params->ctrlParams.agc.enable,
sdr->rx_channel_params->ctrlParams.agc.setPoint_dBfs);
int const dc_offset_corr = config_getboolean(Dictionary,Name,"dc-offset-corr",1); // default on
int const iq_imbalance_corr = config_getboolean(Dictionary,Name,"iq-imbalance-corr",1); // default on
if(set_dc_offset_iq_imbalance_correction(sdr,dc_offset_corr,iq_imbalance_corr) == -1)
close_and_exit(sdr,1);
int const transfer_mode_bulk = config_getboolean(Dictionary,Name,"bulk-transfer-mode",0); // default isochronous
if(set_bulk_transfer_mode(sdr,transfer_mode_bulk) == -1)
close_and_exit(sdr,1);
int const rf_notch = config_getboolean(Dictionary,Name,"rf-notch",0);
int const dab_notch = config_getboolean(Dictionary,Name,"dab-notch",0);
int const am_notch = config_getboolean(Dictionary,Name,"am-notch",0);
if(set_notch_filters(sdr,rf_notch,dab_notch,am_notch) == -1)
close_and_exit(sdr,1);
int const biasT = config_getboolean(Dictionary,Name,"bias-t",0);
if(set_biasT(sdr,biasT) == -1)
close_and_exit(sdr,1);
}
// When the IP TTL is 0, we're not limited by the Ethernet hardware MTU so select a much larger packet size
// unless one has been set explicitly
// IPv4 packets are limited to 64KB, IPv6 can go larger with the Jumbo Payload option
RTP_ttl = config_getint(Dictionary,Name,"data-ttl",0); // Default to TTL=0
Status_ttl = config_getint(Dictionary,Name,"status-ttl",1); // Default 1 for status; much lower bandwidth
{
int x = config_getint(Dictionary,Name,"blocksize",-1);
if(x != -1){
sdr->blocksize = x;
} else if(RTP_ttl == 0)
sdr->blocksize = 2048;
else
sdr->blocksize = 960;
}
sdr->description = config_getstring(Dictionary,Name,"description",NULL);
{
time_t tt;
time(&tt);
sdr->rtp.ssrc = config_getint(Dictionary,Name,"ssrc",tt);
}
// Default is AF12 left shifted 2 bits
IP_tos = config_getint(Dictionary,Name,"tos",48);
fprintf(stdout,"Status TTL %d, Data TTL %d, blocksize %'d samples, %'lu bytes\n",
Status_ttl,RTP_ttl,sdr->blocksize,(long unsigned)(sdr->blocksize * sizeof(complex float)));
{
// Start Avahi client that will maintain our mDNS registrations
// Service name, if present, must be unique
// Description, if present becomes TXT record if present
char service_name[1024];
snprintf(service_name,sizeof(service_name),"%s (%s)",sdr->description,sdr->metadata_dest);
avahi_start(service_name,"_ka9q-ctl._udp",5006,sdr->metadata_dest,ElfHashString(sdr->metadata_dest),sdr->description);
snprintf(service_name,sizeof(service_name),"%s (%s)",sdr->description,sdr->data_dest);
avahi_start(service_name,"_rtp._udp",5004,sdr->data_dest,ElfHashString(sdr->data_dest),sdr->description);
}
{
char iface[1024];
resolve_mcast(sdr->data_dest,&sdr->output_data_dest_address,DEFAULT_RTP_PORT,iface,sizeof(iface));
if(strlen(iface) == 0 && Iface != NULL)
strlcpy(iface,Iface,sizeof(iface));
sdr->data_sock = connect_mcast(&sdr->output_data_dest_address,iface,RTP_ttl,IP_tos);
if(sdr->data_sock == -1){
fprintf(stderr,"Can't create multicast socket to %s: %s\n",sdr->data_dest,strerror(errno));
exit(1);
}
socklen_t len = sizeof(sdr->output_data_source_address);
getsockname(sdr->data_sock,(struct sockaddr *)&sdr->output_data_source_address,&len);
resolve_mcast(sdr->metadata_dest,&sdr->output_metadata_dest_address,DEFAULT_STAT_PORT,iface,sizeof(iface));
if(strlen(iface) == 0 && Iface != NULL)
strlcpy(iface,Iface,sizeof(iface));
sdr->status_sock = connect_mcast(&sdr->output_metadata_dest_address,iface,Status_ttl,IP_tos);
if(sdr->status_sock <= 0){
fprintf(stderr,"Can't create multicast status socket to %s: %s\n",sdr->metadata_dest,strerror(errno));
exit(1);
}
// Set up new control socket on port 5006
sdr->nctl_sock = listen_mcast(&sdr->output_metadata_dest_address,iface);
if(sdr->nctl_sock <= 0){
fprintf(stderr,"Can't create multicast command socket from %s: %s\n",sdr->metadata_dest,strerror(errno));
exit(1);
}
}
fprintf(stderr,"Setting initial frequency %'.3lf Hz, %s\n",init_frequency,sdr->frequency_lock ? "locked" : "not locked");
set_center_freq(sdr,init_frequency);
signal(SIGPIPE,SIG_IGN);
signal(SIGINT,set_terminate);
signal(SIGKILL,set_terminate);
signal(SIGQUIT,set_terminate);
signal(SIGTERM,set_terminate);
if(sdr->status)
pthread_create(&sdr->display_thread,NULL,display,sdr);
pthread_create(&sdr->ncmd_thread,NULL,ncmd,sdr);
sdr->samples = malloc(sdr->blocksize * sizeof(complex int16_t));
if(start_streaming(sdr) == -1)
close_and_exit(sdr,1);
send_sdrplay_status(sdr,1); // Tell the world we're alive
// Periodically poll status to ensure device hasn't reset
uint64_t prev_sample_count = 0;
while(true){
sleep(1);
if(Terminate){
fprintf(stderr,"Terminating as requsted by user\n");
close_and_exit(sdr,Terminate-1);
}
uint64_t curr_sample_count = sdr->sample_count;
if(!(curr_sample_count > prev_sample_count))
break; // Device seems to have bombed. Exit and let systemd restart us
prev_sample_count = curr_sample_count;
}
fprintf(stderr,"Device is no longer streaming, exiting\n");
close(sdr->data_sock);
close_and_exit(sdr,0);
}
// Thread to send metadata and process commands
void *ncmd(void *arg){
// Send status, process commands
pthread_setname("sdrplay-cmd");
assert(arg != NULL);
struct sdrstate * const sdr = arg;
if(sdr->status_sock == -1 || sdr->nctl_sock == -1)
return NULL; // Nothing to do
while(true){
uint8_t buffer[Bufsize];
int const length = recv(sdr->nctl_sock,buffer,sizeof(buffer),0);
if(length > 0){
// Parse entries
if((enum pkt_type)buffer[0] != CMD)
continue; // Ignore our own status messages
sdr->commands++;
decode_sdrplay_commands(sdr,buffer+1,length-1);
send_sdrplay_status(sdr,1);
}
}
}
// Status display thread
void *display(void *arg){
assert(arg != NULL);
struct sdrstate *sdr = (struct sdrstate *)arg;
pthread_setname("sdrplay-disp");
fprintf(sdr->status,"Frequency Output clips\n");
off_t stat_point = ftello(sdr->status);
// End lines with return when writing to terminal, newlines when writing to status file
char const eol = stat_point == -1 ? '\r' : '\n';
while(true){
float powerdB = power2dB(sdr->power);
if(stat_point != -1)
fseeko(sdr->status,stat_point,SEEK_SET);
fprintf(sdr->status,"%'-14.0lf%'7.1f%'10d %c",
sdr->rx_channel_params->tunerParams.rfFreq.rfHz,
powerdB,
sdr->clips,
eol);
fflush(sdr->status);
usleep(100000); // 10 Hz
}
return NULL;
}
#if 0
// Status display thread
void *display(void *arg){
assert(arg != NULL);
struct sdrstate *sdr = (struct sdrstate *)arg;
pthread_setname("sdrplay-disp");
fprintf(sdr->status," |-----Gains dB-- ---| |----Levels dB --| clips\n");
fprintf(sdr->status,"Frequency step LNA mixer bband RF A/D Out\n");
fprintf(sdr->status,"Hz dBFS dBFS\n");
off_t stat_point = ftello(sdr->status);
// End lines with return when writing to terminal, newlines when writing to status file
char eol = stat_point == -1 ? '\r' : '\n';
while(true){
if(stat_point != -1)
fseeko(sdr->status,stat_point,SEEK_SET);
fprintf(sdr->status,"%'-15.0lf%4d%4d%7d%6d%c",
sdr->frequency,
sdr->gainstep,
sdr->lna_gain,
sdr->mixer_gain,
sdr->if_gain,
eol);
fflush(sdr->status);
usleep(100000); // 10 Hz
}
return NULL;
}
#endif
void decode_sdrplay_commands(struct sdrstate *sdr,uint8_t *buffer,int length){
uint8_t *cp = buffer;
while(cp - buffer < length){
int ret __attribute__((unused)); // Won't be used when asserts are disabled
enum status_type const type = *cp++; // increment cp to length field
if(type == EOL)
break; // End of list
unsigned int optlen = *cp++;
if(optlen & 0x80){
// length is >= 128 bytes; fetch actual length from next N bytes, where N is low 7 bits of optlen
int length_of_length = optlen & 0x7f;
optlen = 0;
while(length_of_length > 0){
optlen <<= 8;
optlen |= *cp++;
length_of_length--;
}
}
if(cp - buffer + optlen >= length)
break; // Invalid length
switch(type){
case EOL: // Shouldn't get here
break;
case COMMAND_TAG:
sdr->command_tag = decode_int(cp,optlen);
break;
case RADIO_FREQUENCY:
if(!sdr->frequency_lock){
double const f = decode_double(cp,optlen);
set_center_freq(sdr,f);
}
break;
case LNA_GAIN:
{
int lna_gain = decode_int(cp,optlen);
if(lna_gain >= 0){ // LNA gain >= 0 -> LNA state
set_rf_gain(sdr,lna_gain,-1,-1,sdr->rx_channel_params->tunerParams.rfFreq.rfHz);
} else { // LNA gain < 0 -> RF attenuation
set_rf_gain(sdr,-1,-lna_gain,-1,sdr->rx_channel_params->tunerParams.rfFreq.rfHz);
}
}
break;
case IF_GAIN:
{
int if_gain = decode_int(cp,optlen);
if(if_gain == 0){
// IF gain == 0 -> enable AGC
set_if_gain(sdr,-1,-1,1,-1,-60,0,0,0,0);
} else if(-if_gain >= sdrplay_api_NORMAL_MIN_GR && -if_gain <= MAX_BB_GR){
// IF gain in [-20,-59] -> set IF GR
set_if_gain(sdr,-if_gain,-1,0,0,-60,0,0,0,0);
}
}
break;
default: // Ignore all others
break;
}
cp += optlen;
}
}
void send_sdrplay_status(struct sdrstate *sdr,int full){
uint8_t packet[2048];
uint8_t *bp = packet;
sdr->output_metadata_packets++;
*bp++ = 0; // Command/response = response
encode_int32(&bp,COMMAND_TAG,sdr->command_tag);
encode_int64(&bp,CMD_CNT,sdr->commands);
encode_int64(&bp,GPS_TIME,gps_time_ns());
if(sdr->description)
encode_string(&bp,DESCRIPTION,sdr->description,strlen(sdr->description));
double samprate = get_samplerate(sdr);
// Source address we're using to send data
encode_socket(&bp,OUTPUT_DATA_SOURCE_SOCKET,&sdr->output_data_source_address);
// Where we're sending output
encode_socket(&bp,OUTPUT_DATA_DEST_SOCKET,&sdr->output_data_dest_address);
encode_int32(&bp,OUTPUT_SSRC,sdr->rtp.ssrc);
encode_byte(&bp,OUTPUT_TTL,RTP_ttl);
encode_int32(&bp,INPUT_SAMPRATE,(int)samprate);
encode_int64(&bp,OUTPUT_DATA_PACKETS,sdr->rtp.packets);
encode_int64(&bp,OUTPUT_METADATA_PACKETS,sdr->output_metadata_packets);
// Front end
encode_byte(&bp,LNA_GAIN,sdr->rx_channel_params->tunerParams.gain.LNAstate);
encode_int32(&bp,IF_GAIN,sdr->rx_channel_params->tunerParams.gain.gRdB);
encode_double(&bp,GAIN,sdr->rx_channel_params->tunerParams.gain.gainVals.curr);
// Tuning
encode_double(&bp,RADIO_FREQUENCY,sdr->rx_channel_params->tunerParams.rfFreq.rfHz);
encode_int32(&bp,LOCK,sdr->frequency_lock);
encode_byte(&bp,DEMOD_TYPE,0); // actually LINEAR_MODE
encode_int32(&bp,OUTPUT_SAMPRATE,(int)samprate);
encode_int32(&bp,OUTPUT_CHANNELS,2);
double bandwidth = min(1000.0 * sdr->rx_channel_params->tunerParams.bwType, samprate);
encode_float(&bp,HIGH_EDGE,+0.43 * bandwidth); // empirical for sdrplay
encode_float(&bp,LOW_EDGE,-0.43 * bandwidth); // Should look at the actual filter curves
encode_eol(&bp);
int const len = bp - packet;
assert(len < sizeof(packet));
send(sdr->status_sock,packet,len,0);
}
// SDRplay specific functions
static int init_api(struct sdrstate *sdr){
sdrplay_api_ErrT err;
err = sdrplay_api_Open();
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_Open() failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
sdr->device_status |= SDRPLAY_API_OPEN;
float ver;
err = sdrplay_api_ApiVersion(&ver);
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_ApiVersion() failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
if(ver != SDRPLAY_API_VERSION){
fprintf(stdout,"SDRplay API version mismatch: found %.2f, expecting %.2f\n",ver,SDRPLAY_API_VERSION);
return -1;
}
err = sdrplay_api_DebugEnable(NULL,dbgLvl);
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_DebugEnable() failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
return 0;
}
static int find_rsp(struct sdrstate *sdr,char const *sn){
sdrplay_api_ErrT err;
err = sdrplay_api_LockDeviceApi();
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_LockDeviceApi() failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
sdr->device_status |= DEVICE_API_LOCKED;
unsigned int ndevices = SDRPLAY_MAX_DEVICES;
sdrplay_api_DeviceT devices[SDRPLAY_MAX_DEVICES];
err = sdrplay_api_GetDevices(devices,&ndevices,ndevices);
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_GetDevices() failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
int found = 0;
for(int i = 0; i < ndevices; i++){
if(strcmp(devices[i].SerNo, sn) == 0){
sdr->device = devices[i];
found = 1;
break;
}
}
if(!found){
fprintf(stdout,"sdrplay device %s not found or unavailable\n",sn);
return -1;
}
return 0;
}
static int set_rspduo_mode(struct sdrstate *sdr,char const *mode,char const *antenna){
// RSPduo mode
int valid_mode = 1;
if(mode == NULL){
if(sdr->device.rspDuoMode & sdrplay_api_RspDuoMode_Single_Tuner)
sdr->device.rspDuoMode = sdrplay_api_RspDuoMode_Single_Tuner;
} else if(strcmp(mode,"single-tuner") == 0 || strcmp(mode,"Single Tuner") == 0){
if(sdr->device.rspDuoMode & sdrplay_api_RspDuoMode_Single_Tuner)
sdr->device.rspDuoMode = sdrplay_api_RspDuoMode_Single_Tuner;
else
valid_mode = 0;
} else if(strcmp(mode,"dual-tuner") == 0 || strcmp(mode,"Dual Tuner") == 0){
if(sdr->device.rspDuoMode & sdrplay_api_RspDuoMode_Dual_Tuner){
sdr->device.rspDuoMode = sdrplay_api_RspDuoMode_Dual_Tuner;
sdr->device.rspDuoSampleFreq = 6e6;
} else
valid_mode = 0;
} else if(strcmp(mode,"master") == 0 || strcmp(mode,"Master") == 0){
if(sdr->device.rspDuoMode & sdrplay_api_RspDuoMode_Master){
sdr->device.rspDuoMode = sdrplay_api_RspDuoMode_Master;
sdr->device.rspDuoSampleFreq = 6e6;
} else
valid_mode = 0;
} else if(strcmp(mode,"master-8msps") == 0 || strcmp(mode,"Master (SR=8MHz)") == 0){
if(sdr->device.rspDuoMode & sdrplay_api_RspDuoMode_Master){
sdr->device.rspDuoMode = sdrplay_api_RspDuoMode_Master;
sdr->device.rspDuoSampleFreq = 8e6;
} else
valid_mode = 0;
} else if(strcmp(mode,"slave") == 0 || strcmp(mode,"Slave") == 0){
if(!(sdr->device.rspDuoMode == sdrplay_api_RspDuoMode_Slave))
valid_mode = 0;
} else
valid_mode = 0;
if(!valid_mode){
fprintf(stdout,"sdrplay - RSPduo mode %s is invalid or not available\n",mode);
return -1;
}
// RSPduo tuner
int valid_tuner = 1;
if(antenna == NULL){
if(sdr->device.rspDuoMode == sdrplay_api_RspDuoMode_Single_Tuner ||
sdr->device.rspDuoMode == sdrplay_api_RspDuoMode_Master)
sdr->device.tuner = sdrplay_api_Tuner_A;
} else if(strcmp(antenna,"tuner1-50ohm") == 0 || strcmp(antenna,"Tuner 1 50ohm") == 0 || strcmp(antenna,"high-z") == 0 || strcmp(antenna,"High Z") == 0){
if(sdr->device.rspDuoMode != sdrplay_api_RspDuoMode_Dual_Tuner && sdr->device.tuner & sdrplay_api_Tuner_A)
sdr->device.tuner = sdrplay_api_Tuner_A;
else
valid_tuner = 0;
} else if(strcmp(antenna,"tuner2-50ohm") == 0 || strcmp(antenna,"Tuner 2 50ohm") == 0){
if(sdr->device.rspDuoMode != sdrplay_api_RspDuoMode_Dual_Tuner && sdr->device.tuner & sdrplay_api_Tuner_B)
sdr->device.tuner = sdrplay_api_Tuner_B;
else
valid_tuner = 0;
} else
valid_tuner = 0;
if(!valid_tuner){
fprintf(stdout,"sdrplay - antenna %s is invalid or not available\n",antenna);
return -1;
}
return 0;
}
static int select_device(struct sdrstate *sdr){
sdrplay_api_ErrT err;
err = sdrplay_api_SelectDevice(&sdr->device);
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_SelectDevice() failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
sdr->device_status |= DEVICE_SELECTED;
err = sdrplay_api_UnlockDeviceApi();
sdr->device_status &= ~DEVICE_API_LOCKED;
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_UnlockDeviceApi() failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
err = sdrplay_api_DebugEnable(sdr->device.dev,dbgLvl);
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_DebugEnable() failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
err = sdrplay_api_GetDeviceParams(sdr->device.dev,&sdr->device_params);
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_GetDeviceParams() failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
if(sdr->device.tuner == sdrplay_api_Tuner_A){
sdr->rx_channel_params = sdr->device_params->rxChannelA;
} else if(sdr->device.tuner == sdrplay_api_Tuner_B){
sdr->rx_channel_params = sdr->device_params->rxChannelB;
} else {
fprintf(stdout,"sdrplay - invalid tuner: %d\n",sdr->device.tuner);
return -1;
}
return 0;
}
static int set_center_freq(struct sdrstate *sdr,double const frequency){
sdr->rx_channel_params->tunerParams.rfFreq.rfHz = frequency;
if(sdr->device_status & DEVICE_STREAMING){
sdrplay_api_ErrT err;
err = sdrplay_api_Update(sdr->device.dev,sdr->device.tuner,sdrplay_api_Update_Tuner_Frf,sdrplay_api_Update_Ext1_None);
if(err != sdrplay_api_Success){
fprintf(stdout,"sdrplay_api_Update(Tuner_Frf) failed: %s\n",sdrplay_api_GetErrorString(err));
return -1;
}
}
return 0;
}
static int set_ifreq(struct sdrstate *sdr,int const ifreq){
int valid_if = 1;
if(sdr->device.hwVer == SDRPLAY_RSPduo_ID && (sdr->device.rspDuoMode == sdrplay_api_RspDuoMode_Dual_Tuner || sdr->device.rspDuoMode == sdrplay_api_RspDuoMode_Master || sdr->device.rspDuoMode == sdrplay_api_RspDuoMode_Slave)){
if(sdr->device.rspDuoSampleFreq == 6e6 && (ifreq == -1 || ifreq == 1620))
sdr->rx_channel_params->tunerParams.ifType = sdrplay_api_IF_1_620;
else if(sdr->device.rspDuoSampleFreq == 8e6 && (ifreq == -1 || ifreq == 2048))
sdr->rx_channel_params->tunerParams.ifType = sdrplay_api_IF_2_048;
else
valid_if = 0;
} else {
if(ifreq == -1 || ifreq == 0){
sdr->rx_channel_params->tunerParams.ifType = sdrplay_api_IF_Zero;
} else if(ifreq == 450){
sdr->rx_channel_params->tunerParams.ifType = sdrplay_api_IF_0_450;
} else if(ifreq == 1620){
sdr->rx_channel_params->tunerParams.ifType = sdrplay_api_IF_1_620;
} else if(ifreq == 2048){
sdr->rx_channel_params->tunerParams.ifType = sdrplay_api_IF_2_048;
} else
valid_if = 0;
}
if(!valid_if){
fprintf(stdout,"sdrplay - IF=%d is invalid\n",ifreq);
return -1;
}
return 0;
}
static int set_bandwidth(struct sdrstate *sdr,int const bandwidth,double const samprate){
double samprate_kHz = samprate / 1000.0;
int valid_bandwidth = 1;
if(bandwidth == sdrplay_api_BW_0_200 || (bandwidth == -1 && samprate_kHz < sdrplay_api_BW_0_300)){
sdr->rx_channel_params->tunerParams.bwType = sdrplay_api_BW_0_200;
} else if(bandwidth == sdrplay_api_BW_0_300 || (bandwidth == -1 && samprate_kHz < sdrplay_api_BW_0_600)){
sdr->rx_channel_params->tunerParams.bwType = sdrplay_api_BW_0_300;
} else if(bandwidth == sdrplay_api_BW_0_600 || (bandwidth == -1 && samprate_kHz < sdrplay_api_BW_1_536)){
sdr->rx_channel_params->tunerParams.bwType = sdrplay_api_BW_0_600;
} else if(bandwidth == sdrplay_api_BW_1_536 || (bandwidth == -1 && samprate_kHz < sdrplay_api_BW_5_000)){
sdr->rx_channel_params->tunerParams.bwType = sdrplay_api_BW_1_536;
} else if(bandwidth == sdrplay_api_BW_5_000 || (bandwidth == -1 && samprate_kHz < sdrplay_api_BW_6_000)){
sdr->rx_channel_params->tunerParams.bwType = sdrplay_api_BW_5_000;
} else if(bandwidth == sdrplay_api_BW_6_000 || (bandwidth == -1 && samprate_kHz < sdrplay_api_BW_7_000)){
sdr->rx_channel_params->tunerParams.bwType = sdrplay_api_BW_6_000;
} else if(bandwidth == sdrplay_api_BW_7_000 || (bandwidth == -1 && samprate_kHz < sdrplay_api_BW_8_000)){
sdr->rx_channel_params->tunerParams.bwType = sdrplay_api_BW_7_000;
} else if(bandwidth == sdrplay_api_BW_8_000 || (bandwidth == -1 && samprate_kHz >= sdrplay_api_BW_8_000)){
sdr->rx_channel_params->tunerParams.bwType = sdrplay_api_BW_8_000;
} else
valid_bandwidth = 0;
if(!valid_bandwidth){
fprintf(stdout,"sdrplay - Bandwidth=%d is invalid\n",bandwidth);
return -1;
}
return 0;
}
static int set_samplerate(struct sdrstate *sdr,double const samprate){
// get actual sample rate and decimation
double actual_sample_rate;
int decimation;
for(decimation = 1; decimation <= MAX_DECIMATION; decimation *= 2){
actual_sample_rate = samprate * decimation;
if(actual_sample_rate >= MIN_SAMPLE_RATE)
break;
}
if(!(actual_sample_rate >= MIN_SAMPLE_RATE && actual_sample_rate <= MAX_SAMPLE_RATE)){
fprintf(stdout,"sdrplay - sample_rate=%f is invalid\n",samprate);
return -1;
}
if(sdr->device.hwVer == SDRPLAY_RSPduo_ID && (sdr->device.rspDuoMode == sdrplay_api_RspDuoMode_Dual_Tuner || sdr->device.rspDuoMode == sdrplay_api_RspDuoMode_Master || sdr->device.rspDuoMode == sdrplay_api_RspDuoMode_Slave)){
if(actual_sample_rate == MIN_SAMPLE_RATE){
if(sdr->device_params->devParams)
sdr->device_params->devParams->fsFreq.fsHz = sdr->device.rspDuoSampleFreq;
} else {
fprintf(stdout,"sdrplay - sample_rate=%f is invalid\n",samprate);
return -1;
}
} else {
sdr->device_params->devParams->fsFreq.fsHz = actual_sample_rate;
}
if(decimation > 1){
sdr->rx_channel_params->ctrlParams.decimation.enable = 1;
sdr->rx_channel_params->ctrlParams.decimation.decimationFactor = decimation;