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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 2017-2023 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 "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;
static struct sockaddr_storage Metadata_source_address; // Source of metadata
static struct sockaddr_storage Metadata_dest_address; // Dest of metadata (typically multicast)
static uint64_t Block_drops; // Stored in output filter on sender, not in channel structure
int Mcast_ttl = DEFAULT_MCAST_TTL;
int IP_tos = DEFAULT_IP_TOS;
float Blocktime;
int Ctl_fd,Status_fd;
uint64_t Metadata_packets;
const char *App_path;
int Verbose;
static struct control {
int item;
bool lock;
int step;
} Control;
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,
*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_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 int decode_radio_status(struct channel *channel,uint8_t const *buffer,int length);
static int for_us(struct channel *channel,uint8_t const *buffer,int length,uint32_t ssrc);
static int init_demod(struct channel *channel);
// 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){
static int const maxcols = 256;
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[maxcols];
while(fgets(line,sizeof(line),fp) != NULL){
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(fgets(line,sizeof(line),fp) != NULL){
chomp(line);
mvwaddstr(pop,row++,1,line);
}
fclose(fp);
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, 15, 30},
{&Options_win, 15, 12},
// {&Presets_win,Npresets+2,9}, // Npresets is not a static initializer
{&Presets_win,15,9},
{&Sig_win,15,25},
{&Demodulator_win,15,26},
{&Filtering_win,15,22},
{&Output_win,16,45},
};
#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 2023, Phil Karn, KA9Q. May be used under the terms of the GNU Public License\n");
}
#if 0
static int dcompare(void const *a,void const *b){
struct channel const *da = a;
struct channel const *db = 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;
}
#endif
static uint32_t Ssrc = 0;
static struct channel Channel;
// 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
// Dummy filter
if(argc <= optind){
fprintf(stderr,"Usage: %s -s <ssrc> mcast_group\n",App_path);
fprintf(stderr,"<ssrc> is positive decimal number, mcast_group is DNS name or IP address of control multicast group\n");
exit(EX_USAGE);
}
while(Ssrc == 0){
Ssrc = arc4random();
fprintf(stderr,"-s missing, generating random ssrc: %'u\n",Ssrc);
}
char iface[1024]; // Multicast interface
resolve_mcast(argv[optind],&Metadata_dest_address,DEFAULT_STAT_PORT,iface,sizeof(iface));
Status_fd = listen_mcast(&Metadata_dest_address,iface);
if(Status_fd == -1){
fprintf(stderr,"Can't listen to mcast status %s\n",argv[optind]);
exit(EX_IOERR);
}
Ctl_fd = connect_mcast(&Metadata_dest_address,iface,Mcast_ttl,IP_tos);
if(Ctl_fd < 0){
fprintf(stderr,"connect to mcast control failed\n");
exit(EX_IOERR);
}
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);
// 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();
struct channel *const channel = &Channel;
init_demod(channel);
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(Ctl_fd,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 {
int const npoll = 1;
struct pollfd pollfd[npoll];
pollfd[0].fd = Status_fd;
pollfd[0].events = POLLIN;
int n = poll(pollfd,npoll,100);
now = gps_time_ns(); // poll() blocks, so update the time of day (only place we block)
if(n < 0){
wprintw(Debug_win,"poll() failure, %s\n",strerror(errno));
screen_update_needed = true;
}
if(pollfd[0].revents & POLLIN){
// Message from the radio program (or some transcoders)
struct sockaddr_storage source_address;
socklen_t ssize = sizeof(source_address);
length = recvfrom(Status_fd,buffer,sizeof(buffer),0,(struct sockaddr *)&source_address,&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) >= 0 ){
// Process only if it's a response to our SSRC
memcpy(&Metadata_source_address,&source_address,sizeof(Metadata_source_address));
screen_update_needed = true;
#ifdef DEBUG_POLL
wprintw(Debug_win,"got response length %d\n",length);
#endif
decode_radio_status(channel,buffer+1,length-1);
// 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(send(Ctl_fd, cmdbuffer, command_len, 0) != 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_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],*ptr;
getentry("Output sample rate, Hz: ",str,sizeof(str));
int samprate = strtol(str,&ptr,0);
if(ptr != str){
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 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 beta: ",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;
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;
if(mx != 0 && my != 0){
#if 0
wprintw(debug," (%d %d)",mx,my);
#endif
if(Tuning_win && wmouse_trafo(Tuning_win,&my,&mx,false)){
// Tuning window
Control.item = my-1;
Control.step = 24-mx;
if(Control.step < 0)
Control.step++;
if(Control.step > 3)
Control.step--;
if(Control.step > 6)
Control.step--;
if(Control.step > 9)
Control.step--;
// Clamp to range
if(Control.step < -3)
Control.step = -3;
if(Control.step > 9)
Control.step = 9;
} else if(Presets_win && wmouse_trafo(Presets_win,&my,&mx,false)){
// In the presets window?
my--;
if(my >= 0 && my < iniparser_getnsec(Pdict)){
char const *preset = iniparser_getsecname(Pdict,my);
encode_string(bpp,PRESET,preset,strlen(preset));
}
} else if(Options_win && wmouse_trafo(Options_win,&my,&mx,false)){
// In the options window
if(channel->demod_type == WFM_DEMOD){
switch(my){
case 1:
encode_int(bpp,OUTPUT_CHANNELS,1);
break;
case 2:
encode_int(bpp,OUTPUT_CHANNELS,2);
break;
}
} else if(channel->demod_type == FM_DEMOD){
switch(my){
case 1:
encode_int(bpp,THRESH_EXTEND,0);
break;
case 2:
encode_int(bpp,THRESH_EXTEND,1);
break;
}
} else if(channel->demod_type == LINEAR_DEMOD){
switch(my){
case 1:
encode_int(bpp,ENVELOPE,1);
encode_int(bpp,OUTPUT_CHANNELS,1);
break;
case 2:
encode_int(bpp,ENVELOPE,1);
encode_int(bpp,OUTPUT_CHANNELS,2);
break;
case 3:
encode_int(bpp,ENVELOPE,0);
encode_int(bpp,OUTPUT_CHANNELS,1);
break;
case 4:
encode_int(bpp,ENVELOPE,0);
encode_int(bpp,OUTPUT_CHANNELS,2);
break;
case 5:
encode_int(bpp,PLL_ENABLE,0);
break;
case 6:
encode_int(bpp,PLL_ENABLE,1);
encode_int(bpp,PLL_SQUARE,0);
break;
case 7:
encode_int(bpp,PLL_ENABLE,1);
encode_int(bpp,PLL_SQUARE,1);
break;
case 8:
encode_int(bpp,AGC_ENABLE,0);
break;
case 9:
encode_int(bpp,AGC_ENABLE,1);
break;
}
}
}
} // end of mouse processing
}
// Initialize a new, unused channel instance where fields start non-zero
static int init_demod(struct channel *channel){
memset(channel,0,sizeof(*channel));
channel->tune.second_LO = NAN;
channel->tune.freq = channel->tune.shift = NAN;
channel->filter.min_IF = channel->filter.max_IF = channel->filter.kaiser_beta = NAN;
channel->output.headroom = channel->linear.hangtime = channel->linear.recovery_rate = NAN;
channel->sig.bb_power = channel->sig.snr = channel->sig.foffset = NAN;
channel->fm.pdeviation = channel->linear.cphase = channel->linear.lock_timer = NAN;
channel->output.gain = NAN;
channel->tp1 = channel->tp2 = NAN;
channel->output.data_fd = channel->output.rtcp_fd = -1;
return 0;
}
// Is response for us (1), or for somebody else (-1)?
static int for_us(struct channel *channel,uint8_t const *buffer,int length,uint32_t ssrc){
uint8_t const *cp = buffer;
while(cp - buffer < length){
enum status_type const type = *cp++; // increment cp to length field
if(type == EOL)
break; // end of list, no length
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; we can't continue to scan
switch(type){
case EOL: // Shouldn't get here
goto done;
case OUTPUT_SSRC: // If we've specified a SSRC, it must match it
if(ssrc != 0){
if(decode_int32(cp,optlen) == ssrc)
return 1; // For us
return -1; // For someone else
}
break;
default:
break; // Ignore on this pass
}
cp += optlen;
}
done:;
return -1; // not specified, so not for us
}
// Decode incoming status message from the radio program, convert and fill in fields in local channel structure
// Leave all other fields unchanged, as they may have local uses (e.g., file descriptors)
// Note that we use some fields in channel differently than in the radio (e.g., dB vs ratios)
static int decode_radio_status(struct channel *channel,uint8_t const *buffer,int length){
uint8_t const *cp = buffer;
while(cp - buffer < length){
enum status_type 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; we can't continue to scan
switch(type){
case EOL:
break;
case CMD_CNT:
channel->commands = decode_int32(cp,optlen);
break;
case DESCRIPTION:
FREE(Frontend.description);
Frontend.description = decode_string(cp,optlen);
break;
case GPS_TIME:
Frontend.timestamp = decode_int64(cp,optlen);
break;
case INPUT_SAMPRATE:
Frontend.samprate = decode_int(cp,optlen);
break;
case INPUT_SAMPLES:
Frontend.samples = decode_int64(cp,optlen);
break;
case AD_OVER:
Frontend.overranges = decode_int64(cp,optlen);
break;
case OUTPUT_DATA_SOURCE_SOCKET:
decode_socket(&channel->output.data_source_address,cp,optlen);
break;
case OUTPUT_DATA_DEST_SOCKET:
decode_socket(&channel->output.data_dest_address,cp,optlen);
break;
case OUTPUT_SSRC:
channel->output.rtp.ssrc = decode_int32(cp,optlen);
break;
case OUTPUT_TTL:
Mcast_ttl = decode_int8(cp,optlen);
break;
case OUTPUT_SAMPRATE:
channel->output.samprate = decode_int(cp,optlen);
break;
case OUTPUT_DATA_PACKETS:
channel->output.rtp.packets = decode_int64(cp,optlen);
break;
case OUTPUT_METADATA_PACKETS:
Metadata_packets = decode_int64(cp,optlen);
break;
case FILTER_BLOCKSIZE:
Frontend.L = decode_int(cp,optlen);
break;
case FILTER_FIR_LENGTH:
Frontend.M = decode_int(cp,optlen);
break;
case LOW_EDGE:
channel->filter.min_IF = decode_float(cp,optlen);
break;
case HIGH_EDGE:
channel->filter.max_IF = decode_float(cp,optlen);