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YSFClients/YSFGateway/APRSWriter.cpp

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4.9 KiB

/*
* Copyright (C) 2010-2014,2016 by Jonathan Naylor G4KLX
*
* 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "APRSWriter.h"
#include "YSFDefines.h"
#include <cstdio>
#include <cassert>
#include <cstring>
#include <cmath>
CAPRSWriter::CAPRSWriter(const std::string& callsign, const std::string& suffix, const std::string& password, const std::string& address, unsigned int port) :
m_thread(NULL),
m_enabled(false),
m_idTimer(1000U, 20U * 60U), // 20 minutes
m_callsign(callsign),
m_txFrequency(0U),
m_rxFrequency(0U),
m_latitude(0.0F),
m_longitude(0.0F),
m_height(0)
{
assert(!callsign.empty());
assert(!password.empty());
assert(!address.empty());
assert(port > 0U);
if (!suffix.empty()) {
m_callsign.append("-");
m_callsign.append(suffix.substr(0U, 1U));
}
m_thread = new CAPRSWriterThread(m_callsign, password, address, port);
}
CAPRSWriter::~CAPRSWriter()
{
}
void CAPRSWriter::setInfo(unsigned int txFrequency, unsigned int rxFrequency, float latitude, float longitude, int height)
{
m_txFrequency = txFrequency;
m_rxFrequency = rxFrequency;
m_latitude = latitude;
m_longitude = longitude;
m_height = height;
}
bool CAPRSWriter::open()
{
m_idTimer.start();
return m_thread->start();
}
void CAPRSWriter::write(const unsigned char* source, const char* type, unsigned char radio, float fLatitude, float fLongitude)
{
assert(source != NULL);
assert(type != NULL);
char callsign[11U];
::memcpy(callsign, source, YSF_CALLSIGN_LENGTH);
callsign[YSF_CALLSIGN_LENGTH] = 0x00U;
size_t n = ::strspn(callsign, "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789");
callsign[n] = 0x00U;
double tempLat = ::fabs(fLatitude);
double tempLong = ::fabs(fLongitude);
double latitude = ::floor(tempLat);
double longitude = ::floor(tempLong);
latitude = (tempLat - latitude) * 60.0 + latitude * 100.0;
longitude = (tempLong - longitude) * 60.0 + longitude * 100.0;
char lat[20U];
::sprintf(lat, "%07.2lf", latitude);
char lon[20U];
::sprintf(lon, "%08.2lf", longitude);
char symbol;
switch (radio) {
case 0x24U:
case 0x28U:
symbol = '[';
break;
case 0x25U:
case 0x29U:
symbol = '>';
break;
case 0x26U:
symbol = 'r';
break;
default:
symbol = '-';
break;
}
char output[300U];
::sprintf(output, "%s-Y>APDPRS,C4FM*,qAR,%s:!%s%c/%s%c%c %s via MMDVM",
callsign, m_callsign.c_str(),
lat, (fLatitude < 0.0F) ? 'S' : 'N',
lon, (fLongitude < 0.0F) ? 'W' : 'E',
symbol, type);
m_thread->write(output);
}
void CAPRSWriter::clock(unsigned int ms)
{
m_idTimer.clock(ms);
if (m_idTimer.hasExpired()) {
sendIdFrames();
m_idTimer.start();
}
}
void CAPRSWriter::close()
{
m_thread->stop();
}
void CAPRSWriter::sendIdFrames()
{
if (!m_thread->isConnected())
return;
// Default values aren't passed on
if (m_latitude == 0.0F && m_longitude == 0.0F)
return;
char desc[100U];
if (m_txFrequency != 0U) {
float offset = float(int(m_rxFrequency) - int(m_txFrequency)) / 1000000.0F;
::sprintf(desc, "MMDVM Voice %.5LfMHz %c%.4lfMHz",
float(m_txFrequency) / 1000000.0L,
offset < 0.0F ? '-' : '+',
::fabs(offset));
} else {
::strcpy(desc, "MMDVM Voice");
}
const char* band = "4m";
if (m_txFrequency >= 1200000000U)
band = "1.2";
else if (m_txFrequency >= 420000000U)
band = "440";
else if (m_txFrequency >= 144000000U)
band = "2m";
else if (m_txFrequency >= 50000000U)
band = "6m";
else if (m_txFrequency >= 28000000U)
band = "10m";
double tempLat = ::fabs(m_latitude);
double tempLong = ::fabs(m_longitude);
double latitude = ::floor(tempLat);
double longitude = ::floor(tempLong);
latitude = (tempLat - latitude) * 60.0 + latitude * 100.0;
longitude = (tempLong - longitude) * 60.0 + longitude * 100.0;
char lat[20U];
::sprintf(lat, "%07.2lf", latitude);
char lon[20U];
::sprintf(lon, "%08.2lf", longitude);
std::string server = m_callsign;
size_t pos = server.find_first_of('-');
if (pos == std::string::npos)
server.append("-S");
else
server.append("S");
char output[500U];
::sprintf(output, "%s>APDG03,TCPIP*,qAC,%s:!%s%cD%s%c&/A=%06.0f%s %s",
m_callsign.c_str(), server.c_str(),
lat, (m_latitude < 0.0F) ? 'S' : 'N',
lon, (m_longitude < 0.0F) ? 'W' : 'E',
float(m_height) * 3.28F, band, desc);
m_thread->write(output);
m_idTimer.start();
}