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direwolf.c
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//
// This file is part of Dire Wolf, an amateur radio packet TNC.
//
// Copyright (C) 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2019, 2020 John Langner, WB2OSZ
//
// This program is free software: you can redistribute it 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 program 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/>.
//
/*------------------------------------------------------------------
*
* Module: direwolf.c
*
* Purpose: Main program for "Dire Wolf" which includes:
*
* Various DSP modems using the "sound card."
* AX.25 encoder/decoder.
* APRS data encoder / decoder.
* APRS digipeater.
* KISS TNC emulator.
* APRStt (touch tone input) gateway
* Internet Gateway (IGate)
* Ham Radio of Things - IoT with Ham Radio
* FX.25 Forward Error Correction.
*
*
*---------------------------------------------------------------*/
#define DIREWOLF_C 1
#include "direwolf.h"
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <getopt.h>
#include <assert.h>
#include <string.h>
#include <signal.h>
#include <ctype.h>
#if __ARM__
//#include <asm/hwcap.h>
//#include <sys/auxv.h> // Doesn't seem to be there.
// We have libc 2.13. Looks like we might need 2.17 & gcc 4.8
#endif
#if __WIN32__
#include <stdio.h>
#include <io.h>
#else
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#ifdef __OpenBSD__
#include <soundcard.h>
#elif __APPLE__
#else
#include <sys/soundcard.h>
#endif
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
#if USE_HAMLIB
#include <hamlib/rig.h>
#endif
#include "version.h"
#include "audio.h"
#include "config.h"
#include "multi_modem.h"
#include "demod.h"
#include "hdlc_rec.h"
#include "hdlc_rec2.h"
#include "ax25_pad.h"
#include "xid.h"
#include "decode_aprs.h"
#include "encode_aprs.h"
#include "textcolor.h"
#include "server.h"
#include "kiss.h"
#include "kissnet.h"
#include "kissserial.h"
#include "kiss_frame.h"
#include "waypoint.h"
#include "gen_tone.h"
#include "digipeater.h"
#include "cdigipeater.h"
#include "tq.h"
#include "xmit.h"
#include "ptt.h"
#include "beacon.h"
#include "dtmf.h"
#include "aprs_tt.h"
#include "tt_user.h"
#include "igate.h"
#include "pfilter.h"
#include "symbols.h"
#include "dwgps.h"
#include "waypoint.h"
#include "log.h"
#include "recv.h"
#include "morse.h"
#include "mheard.h"
#include "ax25_link.h"
#include "dtime_now.h"
#include "fx25.h"
#include "dwsock.h"
//static int idx_decoded = 0;
#if __WIN32__
static BOOL cleanup_win (int);
#else
static void cleanup_linux (int);
#endif
static void usage (char **argv);
#if defined(__SSE__) && !defined(__APPLE__)
static void __cpuid(int cpuinfo[4], int infotype){
__asm__ __volatile__ (
"cpuid":
"=a" (cpuinfo[0]),
"=b" (cpuinfo[1]),
"=c" (cpuinfo[2]),
"=d" (cpuinfo[3]):
"a" (infotype)
);
}
#endif
/*-------------------------------------------------------------------
*
* Name: main
*
* Purpose: Main program for packet radio virtual TNC.
*
* Inputs: Command line arguments.
* See usage message for details.
*
* Outputs: Decoded information is written to stdout.
*
* A socket and pseudo terminal are created for
* for communication with other applications.
*
*--------------------------------------------------------------------*/
static struct audio_s audio_config;
static struct tt_config_s tt_config;
static struct misc_config_s misc_config;
static const int audio_amplitude = 100; /* % of audio sample range. */
/* This translates to +-32k for 16 bit samples. */
/* Currently no option to change this. */
static int d_u_opt = 0; /* "-d u" command line option to print UTF-8 also in hexadecimal. */
static int d_p_opt = 0; /* "-d p" option for dumping packets over radio. */
static int q_h_opt = 0; /* "-q h" Quiet, suppress the "heard" line with audio level. */
static int q_d_opt = 0; /* "-q d" Quiet, suppress the printing of decoded of APRS packets. */
static int A_opt_ais_to_obj = 0; /* "-A" Convert received AIS to APRS "Object Report." */
int main (int argc, char *argv[])
{
int err;
//int eof;
int j;
char config_file[100];
int xmit_calibrate_option = 0;
int enable_pseudo_terminal = 0;
struct digi_config_s digi_config;
struct cdigi_config_s cdigi_config;
struct igate_config_s igate_config;
int r_opt = 0, n_opt = 0, b_opt = 0, B_opt = 0, D_opt = 0, U_opt = 0; /* Command line options. */
char P_opt[16];
char l_opt_logdir[80];
char L_opt_logfile[80];
char input_file[80];
char T_opt_timestamp[40];
int t_opt = 1; /* Text color option. */
int a_opt = 0; /* "-a n" interval, in seconds, for audio statistics report. 0 for none. */
int g_opt = 0; /* G3RUH mode, ignoring default for speed. */
int j_opt = 0; /* 2400 bps PSK compatible with direwolf <= 1.5 */
int J_opt = 0; /* 2400 bps PSK compatible MFJ-2400 and maybe others. */
int d_k_opt = 0; /* "-d k" option for serial port KISS. Can be repeated for more detail. */
int d_n_opt = 0; /* "-d n" option for Network KISS. Can be repeated for more detail. */
int d_t_opt = 0; /* "-d t" option for Tracker. Can be repeated for more detail. */
int d_g_opt = 0; /* "-d g" option for GPS. Can be repeated for more detail. */
int d_o_opt = 0; /* "-d o" option for output control such as PTT and DCD. */
int d_i_opt = 0; /* "-d i" option for IGate. Repeat for more detail */
int d_m_opt = 0; /* "-d m" option for mheard list. */
int d_f_opt = 0; /* "-d f" option for filtering. Repeat for more detail. */
#if USE_HAMLIB
int d_h_opt = 0; /* "-d h" option for hamlib debugging. Repeat for more detail */
#endif
int d_x_opt = 1; /* "-d x" option for FX.25. Default minimal. Repeat for more detail. -qx to silence. */
int aprstt_debug = 0; /* "-d d" option for APRStt (think Dtmf) debug. */
int E_tx_opt = 0; /* "-E n" Error rate % for clobbering trasmit frames. */
int E_rx_opt = 0; /* "-E Rn" Error rate % for clobbering receive frames. */
float e_recv_ber = 0.0; /* Receive Bit Error Rate (BER). */
int X_fx25_xmit_enable = 0; /* FX.25 transmit enable. */
strlcpy(l_opt_logdir, "", sizeof(l_opt_logdir));
strlcpy(L_opt_logfile, "", sizeof(L_opt_logfile));
strlcpy(P_opt, "", sizeof(P_opt));
strlcpy(T_opt_timestamp, "", sizeof(T_opt_timestamp));
#if __WIN32__
// Select UTF-8 code page for console output.
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms686036(v=vs.85).aspx
// This is the default I see for windows terminal:
// >chcp
// Active code page: 437
//Restore on exit? oldcp = GetConsoleOutputCP();
SetConsoleOutputCP(CP_UTF8);
#else
/*
* Default on Raspian & Ubuntu Linux is fine. Don't know about others.
*
* Should we look at LANG environment variable and issue a warning
* if it doesn't look something like en_US.UTF-8 ?
*/
#endif
/*
* Pre-scan the command line options for the text color option.
* We need to set this before any text output.
* Default will be no colors if stdout is not a terminal (i.e. piped into
* something else such as "tee") but command line can override this.
*/
#if __WIN32__
t_opt = _isatty(_fileno(stdout)) > 0;
#else
t_opt = isatty(fileno(stdout));
#endif
/* 1 = normal, 0 = no text colors. */
/* 2, 3, ... alternate escape sequences for different terminals. */
for (j=1; j<argc-1; j++) {
if (strcmp(argv[j], "-t") == 0) {
t_opt = atoi (argv[j+1]);
//dw_printf ("DEBUG: text color option = %d.\n", t_opt);
}
}
// TODO: control development/beta/release by version.h instead of changing here.
// Print platform. This will provide more information when people send a copy the information displayed.
// Might want to print OS version here. For Windows, see:
// https://msdn.microsoft.com/en-us/library/ms724451(v=VS.85).aspx
text_color_init(t_opt);
text_color_set(DW_COLOR_INFO);
//dw_printf ("Dire Wolf version %d.%d (%s) Beta Test 4\n", MAJOR_VERSION, MINOR_VERSION, __DATE__);
dw_printf ("Dire Wolf DEVELOPMENT version %d.%d %s (%s)\n", MAJOR_VERSION, MINOR_VERSION, "A", __DATE__);
//dw_printf ("Dire Wolf version %d.%d\n", MAJOR_VERSION, MINOR_VERSION);
#if defined(ENABLE_GPSD) || defined(USE_HAMLIB) || defined(USE_CM108)
dw_printf ("Includes optional support for: ");
#if defined(ENABLE_GPSD)
dw_printf (" gpsd");
#endif
#if defined(USE_HAMLIB)
dw_printf (" hamlib");
#endif
#if defined(USE_CM108)
dw_printf (" cm108-ptt");
#endif
dw_printf ("\n");
#endif
#if __WIN32__
SetConsoleCtrlHandler ((PHANDLER_ROUTINE)cleanup_win, TRUE);
#else
setlinebuf (stdout);
signal (SIGINT, cleanup_linux);
#endif
/*
* Starting with version 0.9, the prebuilt Windows version
* requires a minimum of a Pentium 3 or equivalent so we can
* use the SSE instructions.
* Try to warn anyone using a CPU from the previous
* century rather than just dying for no apparent reason.
*
* Apple computers with Intel processors started with P6. Since the
* cpu test code was giving Clang compiler grief it has been excluded.
*
* Version 1.6: Newer compiler with i686, rather than i386 target.
* This is running about 10% faster for the same hardware so it would
* appear the compiler is using newer, more efficient, instructions.
*
* According to https://en.wikipedia.org/wiki/P6_(microarchitecture)
* and https://en.wikipedia.org/wiki/Streaming_SIMD_Extensions
* the Pentium III still seems to be the minimum required because
* it has the P6 microarchitecture and SSE instructions.
*
* I've never heard any complaints about anyone getting the message below.
*/
#if defined(__SSE__) && !defined(__APPLE__)
int cpuinfo[4]; // EAX, EBX, ECX, EDX
__cpuid (cpuinfo, 0);
if (cpuinfo[0] >= 1) {
__cpuid (cpuinfo, 1);
//dw_printf ("debug: cpuinfo = %x, %x, %x, %x\n", cpuinfo[0], cpuinfo[1], cpuinfo[2], cpuinfo[3]);
// https://en.wikipedia.org/wiki/CPUID
if ( ! ( cpuinfo[3] & (1 << 25))) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("------------------------------------------------------------------\n");
dw_printf ("This version requires a minimum of a Pentium 3 or equivalent.\n");
dw_printf ("If you are seeing this message, you are probably using a computer\n");
dw_printf ("from the previous Century. See instructions in User Guide for\n");
dw_printf ("information on how you can compile it for use with your antique.\n");
dw_printf ("------------------------------------------------------------------\n");
}
}
text_color_set(DW_COLOR_INFO);
#endif
/*
* Default location of configuration file is current directory.
* Can be overridden by -c command line option.
* TODO: Automatically search other places.
*/
strlcpy (config_file, "direwolf.conf", sizeof(config_file));
/*
* Look at command line options.
* So far, the only one is the configuration file location.
*/
strlcpy (input_file, "", sizeof(input_file));
while (1) {
//int this_option_optind = optind ? optind : 1;
int option_index = 0;
int c;
char *p;
static struct option long_options[] = {
{"future1", 1, 0, 0},
{"future2", 0, 0, 0},
{"future3", 1, 0, 'c'},
{0, 0, 0, 0}
};
/* ':' following option character means arg is required. */
c = getopt_long(argc, argv, "hP:B:gjJD:U:c:pxr:b:n:d:q:t:ul:L:Sa:E:T:e:X:A",
long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 0: /* possible future use */
text_color_set(DW_COLOR_DEBUG);
dw_printf("option %s", long_options[option_index].name);
if (optarg) {
dw_printf(" with arg %s", optarg);
}
dw_printf("\n");
break;
case 'a': /* -a for audio statistics interval */
a_opt = atoi(optarg);
if (a_opt < 0) a_opt = 0;
if (a_opt < 10) {
text_color_set(DW_COLOR_ERROR);
dw_printf("Setting such a small audio statistics interval will produce inaccurate sample rate display.\n");
}
break;
case 'c': /* -c for configuration file name */
strlcpy (config_file, optarg, sizeof(config_file));
break;
#if __WIN32__
#else
case 'p': /* -p enable pseudo terminal */
/* We want this to be off by default because it hangs */
/* eventually when nothing is reading from other side. */
enable_pseudo_terminal = 1;
break;
#endif
case 'B': /* -B baud rate and modem properties. */
/* Also implies modem type based on speed. */
/* Special case "AIS" rather than number. */
if (strcasecmp(optarg, "AIS") == 0) {
B_opt = 12345; // See special case below.
}
else if (strcasecmp(optarg, "EAS") == 0) {
B_opt = 23456; // See special case below.
}
else {
B_opt = atoi(optarg);
}
if (B_opt < MIN_BAUD || B_opt > MAX_BAUD) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Use a more reasonable data baud rate in range of %d - %d.\n", MIN_BAUD, MAX_BAUD);
exit (EXIT_FAILURE);
}
break;
case 'g': /* -g G3RUH modem, overriding default mode for speed. */
g_opt = 1;
break;
case 'j': /* -j V.26 compatible with earlier direwolf. */
j_opt = 1;
break;
case 'J': /* -J V.26 compatible with MFJ-2400. */
J_opt = 1;
break;
case 'P': /* -P for modem profile. */
//debug: dw_printf ("Demodulator profile set to \"%s\"\n", optarg);
strlcpy (P_opt, optarg, sizeof(P_opt));
break;
case 'D': /* -D divide AFSK demodulator sample rate */
D_opt = atoi(optarg);
if (D_opt < 1 || D_opt > 8) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Crazy value for -D. \n");
exit (EXIT_FAILURE);
}
break;
case 'U': /* -U multiply G3RUH demodulator sample rate (upsample) */
U_opt = atoi(optarg);
if (U_opt < 1 || U_opt > 4) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Crazy value for -U. \n");
exit (EXIT_FAILURE);
}
break;
case 'x': /* -x for transmit calibration tones. */
xmit_calibrate_option = 1;
break;
case 'r': /* -r audio samples/sec. e.g. 44100 */
r_opt = atoi(optarg);
if (r_opt < MIN_SAMPLES_PER_SEC || r_opt > MAX_SAMPLES_PER_SEC)
{
text_color_set(DW_COLOR_ERROR);
dw_printf("-r option, audio samples/sec, is out of range.\n");
r_opt = 0;
}
break;
case 'n': /* -n number of audio channels for first audio device. 1 or 2. */
n_opt = atoi(optarg);
if (n_opt < 1 || n_opt > 2)
{
text_color_set(DW_COLOR_ERROR);
dw_printf("-n option, number of audio channels, is out of range.\n");
n_opt = 0;
}
break;
case 'b': /* -b bits per sample. 8 or 16. */
b_opt = atoi(optarg);
if (b_opt != 8 && b_opt != 16)
{
text_color_set(DW_COLOR_ERROR);
dw_printf("-b option, bits per sample, must be 8 or 16.\n");
b_opt = 0;
}
break;
case 'h': // -h for help
case '?':
/* For '?' unknown option message was already printed. */
usage (argv);
break;
case 'd': /* Set debug option. */
/* New in 1.1. Can combine multiple such as "-d pkk" */
for (p=optarg; *p!='\0'; p++) {
switch (*p) {
case 'a': server_set_debug(1); break;
case 'k': d_k_opt++; kissserial_set_debug (d_k_opt); kisspt_set_debug (d_k_opt); break;
case 'n': d_n_opt++; kiss_net_set_debug (d_n_opt); break;
case 'u': d_u_opt = 1; break;
// separate out gps & waypoints.
case 'g': d_g_opt++; break;
case 'w': waypoint_set_debug (1); break; // not documented yet.
case 't': d_t_opt++; beacon_tracker_set_debug (d_t_opt); break;
case 'p': d_p_opt = 1; break; // TODO: packet dump for xmit side.
case 'o': d_o_opt++; ptt_set_debug(d_o_opt); break;
case 'i': d_i_opt++; break;
case 'm': d_m_opt++; break;
case 'f': d_f_opt++; break;
#if AX25MEMDEBUG
case 'l': ax25memdebug_set(); break; // Track down memory Leak. Not documented.
#endif // Previously 'm' but that is now used for mheard.
#if USE_HAMLIB
case 'h': d_h_opt++; break; // Hamlib verbose level.
#endif
case 'x': d_x_opt++; break; // FX.25
case 'd': aprstt_debug++; break; // APRStt (mnemonic Dtmf)
default: break;
}
}
break;
case 'q': /* Set quiet option. */
/* New in 1.2. Quiet option to suppress some types of printing. */
/* Can combine multiple such as "-q hd" */
for (p=optarg; *p!='\0'; p++) {
switch (*p) {
case 'h': q_h_opt = 1; break;
case 'd': q_d_opt = 1; break;
case 'x': d_x_opt = 0; break; // Defaults to minimal info. This silences.
default: break;
}
}
break;
case 't': /* Was handled earlier. */
break;
case 'u': /* Print UTF-8 test and exit. */
dw_printf ("\n UTF-8 test string: ma%c%cana %c%c F%c%c%c%ce\n\n",
0xc3, 0xb1,
0xc2, 0xb0,
0xc3, 0xbc, 0xc3, 0x9f);
exit (0);
break;
case 'l': /* -l for log directory with daily files */
strlcpy (l_opt_logdir, optarg, sizeof(l_opt_logdir));
break;
case 'L': /* -L for log file name with full path */
strlcpy (L_opt_logfile, optarg, sizeof(L_opt_logfile));
break;
case 'S': /* Print symbol tables and exit. */
symbols_init ();
symbols_list ();
exit (0);
break;
case 'E': /* -E Error rate (%) for corrupting frames. */
/* Just a number is transmit. Precede by R for receive. */
if (*optarg == 'r' || *optarg == 'R') {
E_rx_opt = atoi(optarg+1);
if (E_rx_opt < 1 || E_rx_opt > 99) {
text_color_set(DW_COLOR_ERROR);
dw_printf("-ER must be in range of 1 to 99.\n");
E_rx_opt = 10;
}
}
else {
E_tx_opt = atoi(optarg);
if (E_tx_opt < 1 || E_tx_opt > 99) {
text_color_set(DW_COLOR_ERROR);
dw_printf("-E must be in range of 1 to 99.\n");
E_tx_opt = 10;
}
}
break;
case 'T': /* -T for receive timestamp. */
strlcpy (T_opt_timestamp, optarg, sizeof(T_opt_timestamp));
break;
case 'e': /* -e Receive Bit Error Rate (BER). */
e_recv_ber = atof(optarg);
break;
case 'X':
X_fx25_xmit_enable = atoi(optarg);
break;
case 'A': // -A convert AIS to APRS object
A_opt_ais_to_obj = 1;
break;
default:
/* Should not be here. */
text_color_set(DW_COLOR_DEBUG);
dw_printf("?? getopt returned character code 0%o ??\n", c);
usage (argv);
}
} /* end while(1) for options */
if (optind < argc)
{
if (optind < argc - 1)
{
text_color_set(DW_COLOR_ERROR);
dw_printf ("Warning: File(s) beyond the first are ignored.\n");
}
strlcpy (input_file, argv[optind], sizeof(input_file));
}
/*
* Get all types of configuration settings from configuration file.
*
* Possibly override some by command line options.
*/
#if USE_HAMLIB
rig_set_debug(d_h_opt);
#endif
symbols_init ();
(void)dwsock_init();
config_init (config_file, &audio_config, &digi_config, &cdigi_config, &tt_config, &igate_config, &misc_config);
if (r_opt != 0) {
audio_config.adev[0].samples_per_sec = r_opt;
}
if (n_opt != 0) {
audio_config.adev[0].num_channels = n_opt;
if (n_opt == 2) {
audio_config.achan[1].medium = MEDIUM_RADIO;
}
}
if (b_opt != 0) {
audio_config.adev[0].bits_per_sample = b_opt;
}
if (B_opt != 0) {
audio_config.achan[0].baud = B_opt;
/* We have similar logic in direwolf.c, config.c, gen_packets.c, and atest.c, */
/* that need to be kept in sync. Maybe it could be a common function someday. */
if (audio_config.achan[0].baud < 600) {
audio_config.achan[0].modem_type = MODEM_AFSK;
audio_config.achan[0].mark_freq = 1600; // Typical for HF SSB.
audio_config.achan[0].space_freq = 1800;
audio_config.achan[0].decimate = 3; // Reduce CPU load.
}
else if (audio_config.achan[0].baud < 1800) {
audio_config.achan[0].modem_type = MODEM_AFSK;
audio_config.achan[0].mark_freq = DEFAULT_MARK_FREQ;
audio_config.achan[0].space_freq = DEFAULT_SPACE_FREQ;
}
else if (audio_config.achan[0].baud < 3600) {
audio_config.achan[0].modem_type = MODEM_QPSK;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
if (audio_config.achan[0].baud != 2400) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Bit rate should be standard 2400 rather than specified %d.\n", audio_config.achan[0].baud);
}
}
else if (audio_config.achan[0].baud < 7200) {
audio_config.achan[0].modem_type = MODEM_8PSK;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
if (audio_config.achan[0].baud != 4800) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Bit rate should be standard 4800 rather than specified %d.\n", audio_config.achan[0].baud);
}
}
else if (audio_config.achan[0].baud == 12345) {
audio_config.achan[0].modem_type = MODEM_AIS;
audio_config.achan[0].baud = 9600;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
}
else if (audio_config.achan[0].baud == 23456) {
audio_config.achan[0].modem_type = MODEM_EAS;
audio_config.achan[0].baud = 521; // Actually 520.83 but we have an integer field here.
// Will make more precise in afsk demod init.
audio_config.achan[0].mark_freq = 2083; // Actually 2083.3 - logic 1.
audio_config.achan[0].space_freq = 1563; // Actually 1562.5 - logic 0.
strlcpy (audio_config.achan[0].profiles, "A", sizeof(audio_config.achan[0].profiles));
}
else {
audio_config.achan[0].modem_type = MODEM_SCRAMBLE;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
}
}
if (g_opt) {
// Force G3RUH mode, overriding default for speed.
// Example: -B 2400 -g
audio_config.achan[0].modem_type = MODEM_SCRAMBLE;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
}
if (j_opt) {
// V.26 compatible with earlier versions of direwolf.
// Example: -B 2400 -j or simply -j
audio_config.achan[0].v26_alternative = V26_A;
audio_config.achan[0].modem_type = MODEM_QPSK;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
audio_config.achan[0].baud = 2400;
}
if (J_opt) {
// V.26 compatible with MFJ and maybe others.
// Example: -B 2400 -J or simply -J
audio_config.achan[0].v26_alternative = V26_B;
audio_config.achan[0].modem_type = MODEM_QPSK;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
audio_config.achan[0].baud = 2400;
}
audio_config.statistics_interval = a_opt;
if (strlen(P_opt) > 0) {
/* -P for modem profile. */
strlcpy (audio_config.achan[0].profiles, P_opt, sizeof(audio_config.achan[0].profiles));
}
if (D_opt != 0) {
// Reduce audio sampling rate to reduce CPU requirements.
audio_config.achan[0].decimate = D_opt;
}
if (U_opt != 0) {
// Increase G3RUH audio sampling rate to improve performance.
// The value is normally determined automatically based on audio
// sample rate and baud. This allows override for experimentation.
audio_config.achan[0].upsample = U_opt;
}
strlcpy(audio_config.timestamp_format, T_opt_timestamp, sizeof(audio_config.timestamp_format));
// temp - only xmit errors.
audio_config.xmit_error_rate = E_tx_opt;
audio_config.recv_error_rate = E_rx_opt;
if (strlen(l_opt_logdir) > 0 && strlen(L_opt_logfile) > 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Logging options -l and -L can't be used together. Pick one or the other.\n");
exit(1);
}
if (strlen(L_opt_logfile) > 0) {
misc_config.log_daily_names = 0;
strlcpy (misc_config.log_path, L_opt_logfile, sizeof(misc_config.log_path));
}
else if (strlen(l_opt_logdir) > 0) {
misc_config.log_daily_names = 1;
strlcpy (misc_config.log_path, l_opt_logdir, sizeof(misc_config.log_path));
}
misc_config.enable_kiss_pt = enable_pseudo_terminal;
if (strlen(input_file) > 0) {
strlcpy (audio_config.adev[0].adevice_in, input_file, sizeof(audio_config.adev[0].adevice_in));
}
audio_config.recv_ber = e_recv_ber;
audio_config.fx25_xmit_enable = X_fx25_xmit_enable;
/*
* Open the audio source
* - soundcard
* - stdin
* - UDP
* Files not supported at this time.
* Can always "cat" the file and pipe it into stdin.
*/
err = audio_open (&audio_config);
if (err < 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Pointless to continue without audio device.\n");
SLEEP_SEC(5);
exit (1);
}
/*
* Initialize the demodulator(s) and HDLC decoder.
*/
multi_modem_init (&audio_config);
fx25_init (d_x_opt);
/*
* Initialize the touch tone decoder & APRStt gateway.
*/
dtmf_init (&audio_config, audio_amplitude);
aprs_tt_init (&tt_config, aprstt_debug);
tt_user_init (&audio_config, &tt_config);
/*
* Should there be an option for audio output level?
* Note: This is not the same as a volume control you would see on the screen.
* It is the range of the digital sound representation.
*/
gen_tone_init (&audio_config, audio_amplitude, 0);
morse_init (&audio_config, audio_amplitude);
assert (audio_config.adev[0].bits_per_sample == 8 || audio_config.adev[0].bits_per_sample == 16);
assert (audio_config.adev[0].num_channels == 1 || audio_config.adev[0].num_channels == 2);
assert (audio_config.adev[0].samples_per_sec >= MIN_SAMPLES_PER_SEC && audio_config.adev[0].samples_per_sec <= MAX_SAMPLES_PER_SEC);
/*
* Initialize the transmit queue.
*/
xmit_init (&audio_config, d_p_opt);
/*
* If -x option specified, transmit alternating tones for transmitter
* audio level adjustment, up to 1 minute then quit.
* TODO: enhance for more than one channel.
*/
if (xmit_calibrate_option) {
int max_duration = 60; /* seconds */
int n = audio_config.achan[0].baud * max_duration;
int chan = 0;
text_color_set(DW_COLOR_INFO);
dw_printf ("\nSending transmit calibration tones. Press control-C to terminate.\n");
ptt_set (OCTYPE_PTT, chan, 1);
while (n-- > 0) {
tone_gen_put_bit (chan, n & 1);
}
ptt_set (OCTYPE_PTT, chan, 0);
exit (0);
}
/*
* Initialize the digipeater and IGate functions.
*/
digipeater_init (&audio_config, &digi_config);
igate_init (&audio_config, &igate_config, &digi_config, d_i_opt);
cdigipeater_init (&audio_config, &cdigi_config);
pfilter_init (&igate_config, d_f_opt);
ax25_link_init (&misc_config);
/*
* Provide the AGW & KISS socket interfaces for use by a client application.
*/
server_init (&audio_config, &misc_config);
kissnet_init (&misc_config);
/*
* Create a pseudo terminal and KISS TNC emulator.
*/
kisspt_init (&misc_config);
kissserial_init (&misc_config);
kiss_frame_init (&audio_config);
/*
* Open port for communication with GPS.
*/
dwgps_init (&misc_config, d_g_opt);
waypoint_init (&misc_config);
/*
* Enable beaconing.
* Open log file first because "-dttt" (along with -l...) will
* log the tracker beacon transmissions with fake channel 999.
*/
log_init(misc_config.log_daily_names, misc_config.log_path);
mheard_init (d_m_opt);
beacon_init (&audio_config, &misc_config, &igate_config);
/*
* Get sound samples and decode them.
* Use hot attribute for all functions called for every audio sample.
*/
recv_init (&audio_config);
recv_process ();
exit (EXIT_SUCCESS);
}
/*-------------------------------------------------------------------
*
* Name: app_process_rec_frame
*
* Purpose: This is called when we receive a frame with a valid
* FCS and acceptable size.
*
* Inputs: chan - Audio channel number, 0 or 1.
* subchan - Which modem caught it.
* Special case -1 for DTMF decoder.
* slice - Slicer which caught it.
* pp - Packet handle.
* alevel - Audio level, range of 0 - 100.
* (Special case, use negative to skip
* display of audio level line.