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control.c
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control.c
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// Interactive program to send commands and display internal state of 'radiod'
// Why are user interfaces always the biggest, ugliest and buggiest part of any program?
// Written as one big polling loop because ncurses is **not** thread safe
// Copyright 2017-2024 Phil Karn, KA9Q
// Major revisions fall 2020, 2023 (really continuous revisions!)
#define _GNU_SOURCE 1
#include <assert.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdint.h>
#include <unistd.h>
#include <stdbool.h>
#include <limits.h>
#include <string.h>
#if defined(linux)
#include <bsd/string.h>
#include <bsd/stdlib.h> // for arc4random()
#endif
#include <math.h>
#include <complex.h>
#undef I
#include <poll.h>
#include <sys/time.h>
#include <sys/select.h>
#include <ncurses.h>
#include <ctype.h>
#include <sys/socket.h>
#include <netdb.h>
#include <locale.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <iniparser/iniparser.h>
#include <sysexits.h>
#include <errno.h>
#include <fcntl.h>
#include "avahi.h"
#include "misc.h"
#include "filter.h"
#include "multicast.h"
#include "bandplan.h"
#include "status.h"
#include "radio.h"
#include "config.h"
static int const DEFAULT_IP_TOS = 48;
static int const DEFAULT_MCAST_TTL = 1; // LAN only, no routers
static float Refresh_rate = 0.25f;
static char Locale[256] = "en_US.UTF-8";
static char const *Presets_file = "presets.conf"; // make configurable!
static dictionary *Pdict;
struct frontend Frontend;
struct sockaddr_storage Metadata_source_socket; // Source of metadata
struct sockaddr_storage Metadata_dest_socket; // Dest of metadata (typically multicast)
int Mcast_ttl = DEFAULT_MCAST_TTL;
int IP_tos = DEFAULT_IP_TOS;
float Blocktime;
int Overlap;
int Output_fd,Status_fd;
const char *App_path;
int Verbose;
static struct control {
int item;
bool lock;
int step;
} Control;
static struct {
float noise_bandwidth;
float sig_power;
float sn0;
float snr;
int64_t pll_start_time;
double pll_start_phase;
} Local;
static int send_poll(int ssrc);
static int pprintw(WINDOW *w,int y, int x, char const *prefix, char const *fmt, ...);
static WINDOW *Tuning_win,*Sig_win,*Filtering_win,*Demodulator_win,
*Options_win,*Presets_win,*Debug_win,*Input_win,
*Output_win;
static void display_tuning(WINDOW *tuning,struct channel const *channel);
static void display_info(WINDOW *w,int row,int col,struct channel const *channel);
static void display_filtering(WINDOW *filtering,struct channel const *channel);
static void display_sig(WINDOW *sig,struct channel const *channel);
static void display_demodulator(WINDOW *demodulator,struct channel const *channel);
static void display_options(WINDOW *options,struct channel const *channel);
static void display_presets(WINDOW *modes,struct channel const *channel);
static void display_input(WINDOW *input,struct channel const *channel);
static void display_output(WINDOW *output,struct channel const *channel);
static int process_keyboard(struct channel *,uint8_t **bpp,int c);
static void process_mouse(struct channel *channel,uint8_t **bpp);
static bool for_us(struct channel *channel,uint8_t const *buffer,int length,uint32_t ssrc);
static int init_demod(struct channel *channel);
// Fill in set of locally generated variables from channel structure
static void gen_locals(struct frontend *frontend,struct channel *channel){
Local.noise_bandwidth = fabsf(channel->filter.max_IF - channel->filter.min_IF);
Local.sig_power = channel->sig.bb_power - Local.noise_bandwidth * channel->sig.n0;
if(Local.sig_power < 0)
Local.sig_power = 0; // Avoid log(-x) = nan
Local.sn0 = Local.sig_power/channel->sig.n0;
Local.snr = power2dB(Local.sn0/Local.noise_bandwidth);
}
// Pop up a temporary window with the contents of a file in the
// library directory (usually /usr/local/share/ka9q-radio/)
// then wait for a single keyboard character to clear it
static void popup(char const *filename){
char fname[PATH_MAX];
if (dist_path(fname,sizeof(fname),filename) == -1)
return;
FILE * const fp = fopen(fname,"r");
if(fp == NULL)
return;
// Determine size of box
int rows=0, cols=0;
char *line = NULL;
size_t maxcols = 0;
while(getline(&line,&maxcols,fp) > 0){
chomp(line);
rows++;
if(strlen(line) > cols)
cols = strlen(line); // Longest line
}
rewind(fp);
// Allow room for box
WINDOW * const pop = newwin(rows+2,cols+2,0,0);
box(pop,0,0);
int row = 1; // Start inside box
while(getline(&line,&maxcols,fp) > 0){
chomp(line);
mvwaddstr(pop,row++,1,line);
}
fclose(fp);
FREE(line);
wnoutrefresh(pop);
doupdate();
wtimeout(pop,-1); // blocking read - wait indefinitely
(void)wgetch(pop); // Read and discard one character
wtimeout(pop,0);
werase(pop);
wrefresh(pop);
delwin(pop);
}
// Pop up a dialog box, issue a prompt and get a response
static void getentry(char const *prompt,char *response,int len){
int boxwidth = strlen(prompt) + len;
WINDOW * const pwin = newwin(5,boxwidth+2,0,0);
box(pwin,0,0);
mvwaddstr(pwin,1,1,prompt);
wrefresh(pwin);
echo();
timeout(-1);
// Manpage for wgetnstr doesn't say whether a terminating
// null is stashed. Hard to believe it isn't, but this is to be sure
memset(response,0,len);
int r = wgetnstr(pwin,response,len);
if(r != OK)
memset(response,0,len); // Zero out the read buffer
chomp(response);
timeout(0);
noecho();
werase(pwin);
wrefresh(pwin);
delwin(pwin);
}
static FILE *Tty;
static SCREEN *Term;
static void display_cleanup(void){
echo();
nocbreak();
if(!isendwin()){
endwin();
refresh();
}
if(Term)
delscreen(Term);
Term = NULL;
if(Tty)
fclose(Tty);
Tty = NULL;
}
static bool Frequency_lock;
// Adjust the selected item up or down one step
static void adjust_item(struct channel *channel,uint8_t **bpp,int direction){
double tunestep = pow(10., (double)Control.step);
if(!direction)
tunestep = - tunestep;
switch(Control.item){
case 0: // Carrier frequency
if(!Frequency_lock){ // Ignore if locked
channel->tune.freq += tunestep;
encode_double(bpp,RADIO_FREQUENCY,channel->tune.freq);
}
break;
case 1: // First LO
if(Control.lock) // Tuner is locked, don't change it
break;
// Send via radiod
encode_float(bpp,FIRST_LO_FREQUENCY,Frontend.frequency+tunestep);
break;
case 2: // IF (not implemented)
break;
case 3: // Filter low edge (hertz rather than millihertz)
{
float const x = min(channel->filter.max_IF,channel->filter.min_IF + (float)tunestep * 1000);
channel->filter.min_IF = x;
encode_float(bpp,LOW_EDGE,x);
}
break;
case 4: // Filter high edge
{
float const x = max(channel->filter.min_IF,channel->filter.max_IF + (float)tunestep * 1000);
channel->filter.max_IF = x;
encode_float(bpp,HIGH_EDGE,x);
}
break;
case 5: // Post-detection audio frequency shift
channel->tune.shift += tunestep;
encode_double(bpp,SHIFT_FREQUENCY,channel->tune.shift);
break;
}
}
// It seems better to just use the Griffin application to turn knob events into keystrokes or mouse events
static void adjust_up(struct channel *channel,uint8_t **bpp){
adjust_item(channel,bpp,1);
}
static void adjust_down(struct channel *channel,uint8_t **bpp){
adjust_item(channel,bpp,0);
}
static void toggle_lock(void){
switch(Control.item){
case 0:
Frequency_lock = !Frequency_lock; // Toggle frequency tuning lock
break;
case 1:
Control.lock = !Control.lock;
break;
}
}
// List of status windows, in order they'll be created, with sizes
static struct windef {
WINDOW **w;
int rows;
int cols;
} Windefs[] = {
{&Tuning_win, 18, 30},
{&Options_win, 18, 12},
// {&Presets_win,Npresets+2,9}, // Npresets is not a static initializer
{&Presets_win,18,9},
{&Sig_win,18,25},
{&Demodulator_win,18,26},
{&Filtering_win,18,22},
{&Input_win,18,45},
{&Output_win,18,45},
};
#define NWINS (sizeof(Windefs) / sizeof(Windefs[0]))
static void setup_windows(void){
// First row
int row = 0;
int col = 0;
int maxrows = 0;
endwin();
refresh();
clear();
struct winsize w;
ioctl(fileno(Tty),TIOCGWINSZ,&w);
COLS = w.ws_col;
LINES = w.ws_row;
// Delete all previous windows
for(int i=0; i < NWINS; i++){
if(*Windefs[i].w)
delwin(*Windefs[i].w);
*Windefs[i].w = NULL;
}
// Create as many as will fit
for(int i=0; i < NWINS; i++){
if(COLS < col + Windefs[i].cols){
// No more room on this line, go to next
col = 0;
row += maxrows;
maxrows = 0;
}
if(LINES < row + Windefs[i].rows){
// No more room for anything
return;
}
// Room on this line
* Windefs[i].w = newwin(Windefs[i].rows,Windefs[i].cols,row,col);
col += Windefs[i].cols;
maxrows = max(maxrows,Windefs[i].rows);
}
// Specially set up debug window
// Minimum of 45 cols for debug window, otherwise go to next row
if(col + 45 > COLS){
row += maxrows;
col = 0;
}
if(row < LINES && col < COLS)
Debug_win = newwin(LINES - row,COLS-col,row,col); // Only if room is left
// A message from our sponsor...
scrollok(Debug_win,TRUE); // This one scrolls so it can be written to with wprintw(...\n)
wprintw(Debug_win,"KA9Q-radio %s last modified %s\n",__FILE__,__TIMESTAMP__);
wprintw(Debug_win,"Copyright 2024, Phil Karn, KA9Q. May be used under the terms of the GNU Public License\n");
}
// Comparison for sorting by SSRC
static int chan_compare(void const *a,void const *b){
struct channel const *da = *(struct channel **)a;
struct channel const *db = *(struct channel **)b;
if(da->output.rtp.ssrc < db->output.rtp.ssrc){
return -1;
}
if(da->output.rtp.ssrc > db->output.rtp.ssrc){
return +1;
}
return 0;
}
static uint32_t Ssrc = 0;
// Thread to display receiver state, updated at 10Hz by default
// Uses the ancient ncurses text windowing library
// Also services keyboard, mouse and tuning knob, if present
int main(int argc,char *argv[]){
App_path = argv[0];
{
int c;
while((c = getopt(argc,argv,"vVs:r:")) != -1){
switch(c){
case 'V':
VERSION();
exit(EX_OK);
case 'v':
Verbose++;
break;
case 's':
Ssrc = strtol(optarg,NULL,0); // Send to specific SSRC
break;
case 'r':
Refresh_rate = strtod(optarg,NULL);
break;
default:
fprintf(stdout,"Unknown option %c\n",c);
break;
}
}
}
{
// The display thread assumes en_US.UTF-8, or anything with a thousands grouping character
// Otherwise the cursor movements will be wrong
char const * const cp = getenv("LANG");
if(cp != NULL){
strlcpy(Locale,cp,sizeof(Locale));
}
}
setlocale(LC_ALL,Locale); // Set either the hardwired default or the value of $LANG if it exists
char const *target = argc > optind ? argv[optind] : NULL;
Output_fd = socket(AF_INET,SOCK_DGRAM,0); // Eventually intended for all output with sendto()
if(Output_fd < 0){
fprintf(stdout,"can't create output socket: %s\n",strerror(errno));
exit(EX_OSERR); // let systemd restart us
}
fcntl(Output_fd,F_SETFL,O_NONBLOCK); // Just drop instead of blocking real time
if(target == NULL){
// Use avahi browser to find a radiod instance to control
fprintf(stdout,"Scanning for radiod instances...\n");
int const table_size = 1000;
struct service_tab table[table_size];
int radiod_count = avahi_browse(table,table_size,"_ka9q-ctl._udp"); // Returns list in global when cache is emptied
if(radiod_count == 0){
fprintf(stdout,"No radiod instances or Avahi not running; specify control channel manually\n");
exit(EX_UNAVAILABLE);
}
int n = 0;
if(radiod_count == 1){
// Only one, use it
fprintf(stdout,"Using %s (%s)\n",table[n].name,table[n].dns_name);
} else {
for(int i=0; i < radiod_count; i++)
fprintf(stdout,"%d: %s (%s)\n",i,table[i].name,table[i].dns_name);
fprintf(stdout,"Select index: ");
fflush(stdout);
char *line = NULL;
size_t linesize = 0;
if(getline(&line,&linesize,stdin) <= 0){
fprintf(stdout,"EOF on input\n");
FREE(line);
exit(EX_USAGE);
}
n = strtol(line,NULL,0);
FREE(line);
if(n < 0 || n >= radiod_count){
fprintf(stdout,"Index %d out of range, try again\n",n);
exit(EX_USAGE);
}
}
struct addrinfo *results = NULL;
struct addrinfo hints;
memset(&hints,0,sizeof(hints));
hints.ai_family = AF_INET; // IPv4 for now
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
hints.ai_flags = AI_ADDRCONFIG | AI_NUMERICHOST | AI_NUMERICSERV;
int const ecode = getaddrinfo(table[n].address,table[n].port,&hints,&results);
if(ecode != 0){
fprintf(stdout,"getaddrinfo: %s\n",gai_strerror(ecode));
exit(EX_IOERR);
}
// Use first entry on list -- much simpler
// I previously tried each entry in turn until one succeeded, but with UDP sockets and
// flags set to only return supported addresses, how could any of them fail?
memcpy(&Metadata_dest_socket,results->ai_addr,sizeof(Metadata_dest_socket));
freeaddrinfo(results); results = NULL;
Status_fd = listen_mcast(&Metadata_dest_socket,table[n].interface);
join_group(Output_fd,(struct sockaddr *)&Metadata_dest_socket,table[n].interface,Mcast_ttl,IP_tos);
} else {
// Use resolv_mcast to resolve a manually entered domain name, using default port and parsing possible interface
char iface[1024]; // Multicast interface
resolve_mcast(target,&Metadata_dest_socket,DEFAULT_STAT_PORT,iface,sizeof(iface),0);
Status_fd = listen_mcast(&Metadata_dest_socket,iface);
join_group(Output_fd,(struct sockaddr *)&Metadata_dest_socket,iface,Mcast_ttl,IP_tos);
}
if(Status_fd < 0){
fprintf(stderr,"Can't listen to mcast status channel: %s\n",strerror(errno));
exit(EX_IOERR);
}
{
// All reads from the status channel will have a timeout
// Should this be configurable?
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 100000; // 100k microsec = 100 millisec
if(setsockopt(Status_fd,SOL_SOCKET,SO_RCVTIMEO,&timeout,sizeof(timeout)) == -1)
perror("setsock timeout");
}
char presetsfile_path[PATH_MAX];
if (dist_path(presetsfile_path,sizeof(presetsfile_path),Presets_file) == -1) {
fprintf(stderr,"Could not find mode file %s\n", Presets_file);
exit(EX_NOINPUT);
}
Pdict = iniparser_load(presetsfile_path);
if(Pdict == NULL){
fprintf(stdout,"Can't load mode file %s\n",presetsfile_path);
exit(EX_NOINPUT);
}
atexit(display_cleanup);
struct channel **channels = NULL;
int chan_count = 0;
while(Ssrc == 0){
// No channel specified; poll radiod for a list, sort and let user choose
// If responses are lost or delayed and the user gets an incomplete list, just hit return
// and we'll poll again. New entries will be added & existing entries will be updated
// though any that disappear from radiod will remain on the list (not a big deal here)
// The search exits after either a 100 ms timeout waiting for any incoming message OR 1 sec with no new channels seen
// The second test is important when monitoring a status channel busy with 'control' polls or ka9q-web spectrum data
send_poll(0xffffffff);
// Read responses
int const chan_max = 1024;
if(channels == NULL)
channels = (struct channel **)calloc(chan_max,sizeof(struct channel *));
int64_t last_new_entry = gps_time_ns();
while(chan_count < chan_max){
struct sockaddr_storage source_socket;
socklen_t ssize = sizeof(source_socket);
uint8_t buffer[PKTSIZE];
int length = recvfrom(Status_fd,buffer,sizeof(buffer),0,(struct sockaddr *)&source_socket,&ssize); // should not block
if(length == -1 && errno == EAGAIN)
break; // Timeout; we're done
// Ignore our own command packets
if(length < 2 || (enum pkt_type)buffer[0] != STATUS)
continue;
// What to do with the source addresses?
memcpy(&Metadata_source_socket,&source_socket,sizeof(Metadata_source_socket));
struct channel * const channel = calloc(1,sizeof(struct channel));
init_demod(channel);
decode_radio_status(&Frontend,channel,buffer+1,length-1);
// Do we already have it?
int i;
for(i=0; i < chan_count; i++)
if(channels[i]->output.rtp.ssrc == channel->output.rtp.ssrc)
break;
if(i < chan_count){
// Already in table, replace
assert(channels[i] != NULL);
FREE(channels[i]);
channels[i] = channel;
if(gps_time_ns() > last_new_entry + BILLION)
break; // Give up after 1 sec with no new channels
} else {
channels[chan_count++] = channel; // New one, add
last_new_entry = gps_time_ns();
}
}
qsort(channels,chan_count,sizeof(channels[0]),chan_compare);
fprintf(stdout,"%13s %9s %13s %5s %s\n","SSRC","preset","freq, Hz","SNR","output channel");
uint32_t last_ssrc = 0;
for(int i=0; i < chan_count;i++){
struct channel *channel = channels[i];
if(channel == NULL || channel->output.rtp.ssrc == last_ssrc) // Skip dupes
continue;
char const *ip_addr_string = formatsock(&channel->output.dest_socket);
gen_locals(&Frontend,channel);
fprintf(stdout,"%13u %9s %'13.f %5.1f %s\n",channel->output.rtp.ssrc,channel->preset,channel->tune.freq,Local.snr,ip_addr_string);
last_ssrc = channel->output.rtp.ssrc;
}
fprintf(stdout,"%d channels; choose SSRC, create new SSRC, or hit return to look for more: ",chan_count);
fflush(stdout);
char *line = NULL;
size_t length = 0;
if(getline(&line,&length,stdin) <= 0){
fprintf(stdout,"EOF on input, exiting\n");
FREE(line);
exit(EX_USAGE);
}
int const n = strtol(line,NULL,0);
FREE(line);
if(n > 0)
Ssrc = n; // Will cause a break from this loop
}
// Free channel structures and pointer array, if they were used
for(int i=0; i < chan_count; i++){
if(channels[i] != NULL)
FREE(channels[i]);
}
FREE(channels);
struct channel Channel;
struct channel *channel = &Channel;
init_demod(channel);
// Set up display subwindows
Tty = fopen("/dev/tty","r+");
Term = newterm(NULL,Tty,Tty);
set_term(Term);
// meta(stdscr,TRUE);
keypad(stdscr,TRUE);
timeout(0); // Don't block in getch()
cbreak();
noecho();
mmask_t const mask = ALL_MOUSE_EVENTS;
mousemask(mask,NULL);
setup_windows();
Frontend.frequency = Frontend.min_IF = Frontend.max_IF = NAN;
/* Main loop:
Send poll if we haven't received one in our refresh interval
See if anything has arrived (use short timeout)
If there's a response, update local status & repaint display windows
Poll keyboard and process user commands
Randomize polls over +/- 32 ms in case someone else is also polling
This avoids possible synchronized back-to-back polls
This is a common technique in multicast protocols (e.g., IGMP queries)
*/
int const random_interval = 64 << 20; // power of 2 makes it easier for arc4random_uniform()
int64_t now = gps_time_ns();
int64_t next_radio_poll = now; // Immediate first poll
bool screen_update_needed = false;
for(;;){
int64_t const radio_poll_interval = Refresh_rate * BILLION; // Can change from the keyboard
if(now >= next_radio_poll){
// Time to poll radio
send_poll(Ssrc);
#ifdef DEBUG_POLL
wprintw(Debug_win,"poll sent %lld\n",now);
#endif
// Retransmit after 1/10 sec if no response
next_radio_poll = now + radio_poll_interval + arc4random_uniform(random_interval) - random_interval/2;
}
// Poll the input socket
// This paces keyboard polling so wait no more than 100 ms, even for long refresh intervals
int const recv_timeout = BILLION/10;
int64_t start_of_recv_poll = now;
uint8_t buffer[PKTSIZE];
int length = 0;
do {
now = gps_time_ns();
// Message from the radio program (or some transcoders)
struct sockaddr_storage source_socket;
socklen_t ssize = sizeof(source_socket);
length = recvfrom(Status_fd,buffer,sizeof(buffer),0,(struct sockaddr *)&source_socket,&ssize); // should not block
// Ignore our own command packets and responses to other SSIDs
if(length < 2 || (enum pkt_type)buffer[0] != STATUS || !for_us(channel,buffer+1,length-1,Ssrc))
continue; // Can include a timeout
// Process only if it's a response to our SSRC
memcpy(&Metadata_source_socket,&source_socket,sizeof(Metadata_source_socket));
screen_update_needed = true;
#ifdef DEBUG_POLL
wprintw(Debug_win,"got response length %d\n",length);
#endif
decode_radio_status(&Frontend,channel,buffer+1,length-1);
gen_locals(&Frontend,channel);
// Postpone next poll to specified interval
next_radio_poll = now + radio_poll_interval + arc4random_uniform(random_interval) - random_interval/2;
if(Blocktime == 0 && Frontend.samprate != 0)
Blocktime = 1000.0f * Frontend.L / Frontend.samprate; // Set the firat time
} while(now < start_of_recv_poll + recv_timeout);
// Set up command buffer in case we want to change something
uint8_t cmdbuffer[PKTSIZE];
uint8_t *bp = cmdbuffer;
*bp++ = CMD; // Command
// Poll keyboard and mouse
int const c = getch();
if(c == KEY_MOUSE){
process_mouse(channel,&bp);
screen_update_needed = true;
} else if(c != ERR) {
screen_update_needed = true;
if(process_keyboard(channel,&bp,c) == -1)
goto quit;
}
// Any commands to send?
if(bp > cmdbuffer+1){
// Yes
assert(Ssrc != 0);
encode_int(&bp,OUTPUT_SSRC,Ssrc); // Specific SSRC
encode_int(&bp,COMMAND_TAG,arc4random()); // Append a command tag
encode_eol(&bp);
int const command_len = bp - cmdbuffer;
#ifdef DEBUG_POLL
wprintw(Debug_win,"sent command len %d\n",command_len);
screen_update_needed = true; // show local change right away
#endif
if(sendto(Output_fd, cmdbuffer, command_len, 0, (struct sockaddr *)&Metadata_dest_socket,sizeof(struct sockaddr)) != command_len){
wprintw(Debug_win,"command send error: %s\n",strerror(errno));
screen_update_needed = true; // show local change right away
}
// This will elicit an answer, defer the next poll
next_radio_poll = now + radio_poll_interval + arc4random_uniform(random_interval) - random_interval/2;
}
if(screen_update_needed){
// update display windows
display_tuning(Tuning_win,channel);
display_filtering(Filtering_win,channel);
display_sig(Sig_win,channel);
display_demodulator(Demodulator_win,channel);
display_options(Options_win,channel);
display_presets(Presets_win,channel);
display_input(Input_win,channel);
display_output(Output_win,channel);
if(Debug_win != NULL){
touchwin(Debug_win); // since we're not redrawing it every cycle
wnoutrefresh(Debug_win);
}
doupdate(); // Update the screen right before we pause
screen_update_needed = false;
}
}
quit:;
endwin();
set_term(NULL);
if(Term != NULL)
delscreen(Term);
#if 0 // double free error, not really needed anyway
if(Tty != NULL)
fclose(Tty);
#endif
exit(EX_OK);
}
int const Entry_width = 15;
static int process_keyboard(struct channel *channel,uint8_t **bpp,int c){
// Look for keyboard and mouse events
switch(c){
case ERR:
break;
case KEY_RESIZE:
setup_windows();
break;
case 0x3: // ^C
case 'q': // Exit entire radio program. Should this be removed? ^C also works.
return -1;
case 'h':
case '?':
popup("help.txt");
break;
case 'l': // Toggle RF or first LO lock; affects how adjustments to LO and IF behave
toggle_lock();
break;
case KEY_NPAGE: // Page Down/tab key
case '\t': // go to next tuning item
Control.item = (Control.item + 1) % 6;
break;
case KEY_BTAB: // Page Up/Backtab, i.e., shifted tab:
case KEY_PPAGE: // go to previous tuning item
Control.item = (6 + Control.item - 1) % 6;
break;
case KEY_HOME: // Go back to item 0
Control.item = 0;
Control.step = 0;
break;
case KEY_BACKSPACE: // Cursor left: increase tuning step 10x
case KEY_LEFT:
if(Control.step >= 9){
beep();
break;
}
Control.step++;
break;
case KEY_RIGHT: // Cursor right: decrease tuning step /10
if(Control.step <= -3){
beep();
break;
}
Control.step--;
break;
case KEY_UP: // Increase whatever digit we're tuning
adjust_up(channel,bpp);
break;
case KEY_DOWN: // Decrease whatever we're tuning
adjust_down(channel,bpp);
break;
case '\f': // Screen repaint (formfeed, aka control-L)
clearok(curscr,TRUE);
break;
case 'S':
{
char str[Entry_width];
getentry("Output sample rate, Hz: ",str,sizeof(str));
int samprate = parse_frequency(str,false);
channel->output.samprate = samprate;
encode_int(bpp,OUTPUT_SAMPRATE,channel->output.samprate);
}
break;
case 's': // Squelch threshold for current mode
{
char str[Entry_width],*ptr;
getentry("Squelch SNR: ",str,sizeof(str));
float const x = strtof(str,&ptr);
if(ptr != str && isfinite(x)){
encode_float(bpp,SQUELCH_OPEN,x);
encode_float(bpp,SQUELCH_CLOSE,x - 1); // Make this a separate command
}
}
break;
case 'T': // Hang time, s (always taken as positive)
{
char str[Entry_width],*ptr;
getentry("Hang time, s: ",str,sizeof(str));
float const x = fabsf(strtof(str,&ptr));
if(ptr != str && isfinite(x))
encode_float(bpp,AGC_HANGTIME,x);
}
break;
case 'P': // PLL loop bandwidth, always positive
{
char str[Entry_width],*ptr;
getentry("PLL loop bandwidth, Hz: ",str,sizeof(str));
float const x = fabsf(strtof(str,&ptr));
if(ptr != str && isfinite(x))
encode_float(bpp,PLL_BW,x);
}
break;
case 'L': // AGC threshold, dB relative to headroom
{
char str[Entry_width],*ptr;
getentry("AGC threshold, dB: ",str,sizeof(str));
float const x = strtof(str,&ptr);
if(ptr != str && isfinite(x))
encode_float(bpp,AGC_THRESHOLD,x);
}
break;
case 'R': // Recovery rate, dB/s (always taken as positive)
{
char str[Entry_width],*ptr;
getentry("Recovery rate, dB/s: ",str,sizeof(str));
float const x = fabsf(strtof(str,&ptr));
if(ptr != str && isfinite(x))
encode_float(bpp,AGC_RECOVERY_RATE,x);
}
break;
case 'H': // Target AGC output level (headroom), dB, taken as negative
{
char str[Entry_width],*ptr;
getentry("Headroom, dB: ",str,sizeof(str));
float const x = -fabsf(strtof(str,&ptr));
if(ptr != str && isfinite(x))
encode_float(bpp,HEADROOM,x);
}
break;
case 'G': // Manually set front end gain, dB (positive or negative)
{
char str[Entry_width],*ptr;
getentry("RF Gain, dB: ",str,sizeof(str));
float const x = strtof(str,&ptr);
if(ptr != str && isfinite(x)){
encode_float(bpp,RF_GAIN,x);
}
}
break;
case 'A': // Manually set front end attenuation, dB (positive or negative)
{
char str[Entry_width],*ptr;
getentry("RF Atten, dB: ",str,sizeof(str));
float const x = fabsf(strtof(str,&ptr));
if(ptr != str && isfinite(x)){
encode_float(bpp,RF_ATTEN,x);
}
}
break;
case 'b':
{
char str[Entry_width],*ptr;
getentry("Opus bitrate, bit/sec (0=auto): ",str,sizeof(str));
int x = labs(strtol(str,&ptr,0));
if(ptr != str){
if(x < 510)
x *= 1000;
encode_int(bpp,OPUS_BIT_RATE,x);
}
}
break;
case 'g': // Manually set linear channel gain, dB (positive or negative)
{
char str[Entry_width],*ptr;
getentry("Gain, dB: ",str,sizeof(str));
float const x = strtof(str,&ptr);
if(ptr != str && isfinite(x)){
encode_float(bpp,GAIN,x);
encode_byte(bpp,AGC_ENABLE,0); // Also done implicitly in radiod
}
}
break;
case 'r': // Poll/refresh rate
{
char str[Entry_width],*ptr;
getentry("Refresh rate (s): ",str,sizeof(str));
float const x = fabsf(strtof(str,&ptr));
if(ptr != str && isfinite(x))
Refresh_rate = x;
}
break;
case 'p':
case 'm': // Manual mode preset
{
char str[Entry_width];
char prompt[1024];
snprintf(prompt,sizeof(prompt),"Mode/Preset [ ");
int const nsec = iniparser_getnsec(Pdict);
for(int i=0;i < nsec;i++){
strlcat(prompt,iniparser_getsecname(Pdict,i),sizeof(prompt));
strlcat(prompt," ",sizeof(prompt));
}
strlcat(prompt,"]: ",sizeof(prompt));
getentry(prompt,str,sizeof(str));
if(strlen(str) > 0)
encode_string(bpp,PRESET,str,strlen(str));
}
break;
case 'f': // Tune to new radio frequency
{
char str[Entry_width];
getentry("Carrier frequency: ",str,sizeof(str));
if(strlen(str) > 0){
double const x = fabs(parse_frequency(str,true)); // Handles funky forms like 147m435
if(isfinite(x)){
channel->tune.freq = x;
encode_double(bpp,RADIO_FREQUENCY,channel->tune.freq);
}
}
}
break;
case 'k': // Kaiser window parameter
{
char str[Entry_width],*ptr;
getentry("Kaiser window β: ",str,sizeof(str));
float const b = strtof(str,&ptr);
if(ptr != str && isfinite(b)){
if(b < 0 || b >= 100){
beep(); // beyond limits
} else {
encode_float(bpp,KAISER_BETA,b);
}
}
}
break;
case 'o': // Set/clear option flags, most apply only to linear detector
{
char str[Entry_width];
getentry("[isb pll square stereo mono agc], '!' prefix disables: ",str,sizeof(str));
bool enable = true;
if(strchr(str,'!') != NULL)
enable = false;
if(strcasestr(str,"mono") != NULL){
encode_int(bpp,OUTPUT_CHANNELS,enable ? 1 : 2);
} else if(strcasestr(str,"stereo") != NULL){
encode_int(bpp,OUTPUT_CHANNELS,enable ? 2 : 1);
} else if(strcasestr(str,"isb") != NULL){
encode_byte(bpp,INDEPENDENT_SIDEBAND,enable);
} else if(strcasestr(str,"pll") != NULL){
encode_byte(bpp,PLL_ENABLE,enable);
} else if(strcasestr(str,"square") != NULL){
encode_byte(bpp,PLL_SQUARE,enable);
if(enable)
encode_byte(bpp,PLL_ENABLE,enable);
} else if(strcasestr(str,"agc") != NULL){
encode_byte(bpp,AGC_ENABLE,enable);
}
}
break;
case 'O': // Set/clear aux option flags, mainly for testing
{
char str[Entry_width],*ptr;
getentry("enter aux option number [0-63], ! disables: ",str,sizeof(str));
bool enable = true;
char *cp = strchr(str,'!');
if(cp != NULL){
enable = false;
cp++;
} else
cp = str;
int n = strtol(cp,&ptr,0);
if(ptr != cp && n >= 0 && n < 64){
if(enable)
encode_int(bpp,SETOPTS,1LL<<n);
else
encode_int(bpp,CLEAROPTS,1LL<<n);
}
}
break;
case 'u':
{
char str[Entry_width],*ptr;
getentry("Data channel status rate ",str,sizeof(str));
int const b = strtol(str,&ptr,0);
if(ptr != str && b >= 0)
encode_int(bpp,STATUS_INTERVAL,b);
}
break;
case 'e':
{
char str[Entry_width];
getentry("Output encoding [s16le s16be f32le f16le opus]: ",str,sizeof(str));
enum encoding e = parse_encoding(str);
if(e != NO_ENCODING)
encode_byte(bpp,OUTPUT_ENCODING,e);
}
break;
default:
beep();
break;
} // switch
return 0;
}
static void process_mouse(struct channel *channel,uint8_t **bpp){
// Process mouse events
// Need to handle the wheel as equivalent to up/down arrows
MEVENT mouse_event;
getmouse(&mouse_event);
int mx,my;
mx = mouse_event.x;
my = mouse_event.y;
mouse_event.y = mouse_event.x = mouse_event.z = 0;