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sdrangel/plugins/channelrx/demodvormc/navaid.h

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Add VOR demodulator
2020-11-24 12:31:16 +00:00
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2020 Jon Beniston, M7RCE //
// //
// 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 as version 3 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 V3 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef INCLUDE_NAVAID_H
#define INCLUDE_NAVAID_H
#include <QString>
#include <QFile>
#include <QByteArray>
#include <QHash>
#include <QList>
#include <QDebug>
#include <QXmlStreamReader>
#include <stdio.h>
#include <string.h>
#include "util/units.h"
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#include "util/csv.h"
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#define OURAIRPORTS_NAVAIDS_URL "https://ourairports.com/data/navaids.csv"
#define OPENAIP_NAVAIDS_URL "https://www.openaip.net/customer_export_akfshb9237tgwiuvb4tgiwbf/%1_nav.aip"
struct NavAid {
int m_id;
QString m_ident; // 2 or 3 character ident
QString m_type; // VOR, VOR-DME or VORTAC
QString m_name;
float m_latitude;
float m_longitude;
float m_elevation;
int m_frequencykHz;
QString m_channel;
int m_range; // Nautical miles
float m_magneticDeclination;
bool m_alignedTrueNorth; // Is the VOR aligned to true North, rather than magnetic (may be the case at high latitudes)
static QString trimQuotes(const QString s)
{
if (s.startsWith('\"') && s.endsWith('\"'))
return s.mid(1, s.size() - 2);
else
return s;
}
int getRangeMetres()
{
return Units::nauticalMilesToIntegerMetres((float)m_range);
}
// OpenAIP XML file
static void readNavAidsXML(QHash<int, NavAid *> *navAidInfo, const QString &filename)
{
QFile file(filename);
if (file.open(QIODevice::ReadOnly | QIODevice::Text))
{
QXmlStreamReader xmlReader(&file);
while(!xmlReader.atEnd() && !xmlReader.hasError())
{
if (xmlReader.readNextStartElement())
{
if (xmlReader.name() == "NAVAID")
{
QStringRef typeRef = xmlReader.attributes().value("TYPE");
if ((typeRef == QLatin1String("VOR"))
|| (typeRef== QLatin1String("VOR-DME"))
|| (typeRef == QLatin1String("VORTAC")))
{
QString type = typeRef.toString();
int identifier = 0;
QString name;
QString id;
float lat = 0.0f;
float lon = 0.0f;
float elevation = 0.0f;
int frequency = 0;
QString channel;
int range = 25;
float declination = 0.0f;
bool alignedTrueNorth = false;
while(xmlReader.readNextStartElement())
{
if (xmlReader.name() == QLatin1String("IDENTIFIER"))
identifier = xmlReader.readElementText().toInt();
else if (xmlReader.name() == QLatin1String("NAME"))
name = xmlReader.readElementText();
else if (xmlReader.name() == QLatin1String("ID"))
id = xmlReader.readElementText();
else if (xmlReader.name() == QLatin1String("GEOLOCATION"))
{
while(xmlReader.readNextStartElement())
{
if (xmlReader.name() == QLatin1String("LAT"))
lat = xmlReader.readElementText().toFloat();
else if (xmlReader.name() == QLatin1String("LON"))
lon = xmlReader.readElementText().toFloat();
else if (xmlReader.name() == QLatin1String("ELEV"))
elevation = xmlReader.readElementText().toFloat();
else
xmlReader.skipCurrentElement();
}
}
else if (xmlReader.name() == QLatin1String("RADIO"))
{
while(xmlReader.readNextStartElement())
{
if (xmlReader.name() == QLatin1String("FREQUENCY"))
frequency = (int)(xmlReader.readElementText().toFloat() * 1000);
else if (xmlReader.name() == QLatin1String("CHANNEL"))
channel = xmlReader.readElementText();
else
xmlReader.skipCurrentElement();
}
}
else if (xmlReader.name() == QLatin1String("PARAMS"))
{
while(xmlReader.readNextStartElement())
{
if (xmlReader.name() == QLatin1String("RANGE"))
range = xmlReader.readElementText().toInt();
else if (xmlReader.name() == QLatin1String("DECLINATION"))
declination = xmlReader.readElementText().toFloat();
else if (xmlReader.name() == QLatin1String("ALIGNEDTOTRUENORTH"))
alignedTrueNorth = xmlReader.readElementText() == "TRUE";
else
xmlReader.skipCurrentElement();
}
}
else
xmlReader.skipCurrentElement();
}
NavAid *vor = new NavAid();
vor->m_id = identifier;
vor->m_ident = id;
// Check idents conform to our filtering rules
if (vor->m_ident.size() < 2)
qDebug() << "Warning: VOR Ident less than 2 characters: " << vor->m_ident;
else if (vor->m_ident.size() > 3)
qDebug() << "Warning: VOR Ident greater than 3 characters: " << vor->m_ident;
vor->m_type = type;
vor->m_name = name;
vor->m_frequencykHz = frequency;
vor->m_channel = channel;
vor->m_latitude = lat;
vor->m_longitude = lon;
vor->m_elevation = elevation;
vor->m_range = range;
vor->m_magneticDeclination = declination;
vor->m_alignedTrueNorth = alignedTrueNorth;
navAidInfo->insert(identifier, vor);
}
}
}
}
file.close();
}
else
qDebug() << "NavAid::readNavAidsXML: Could not open " << filename << " for reading.";
}
// Read OurAirport's NavAids CSV file
// See comments for readOSNDB
static QHash<int, NavAid *> *readNavAidsDB(const QString &filename)
{
int cnt = 0;
QHash<int, NavAid *> *navAidInfo = nullptr;
// Column numbers used for the data as of 2020/10/28
int idCol = 0;
int identCol = 2;
int typeCol = 4;
int nameCol = 3;
int frequencyCol = 5;
int latitudeCol = 6;
int longitudeCol = 7;
int elevationCol = 8;
int powerCol = 18;
qDebug() << "NavAid::readNavAidsDB: " << filename;
FILE *file;
QByteArray utfFilename = filename.toUtf8();
Use C locale in navaid parsing in VOR demods. Increase table size in VOR demod GUI so more than one row is visible.
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QLocale cLocale(QLocale::C);
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if ((file = fopen(utfFilename.constData(), "r")) != NULL)
{
char row[2048];
if (fgets(row, sizeof(row), file))
{
navAidInfo = new QHash<int, NavAid *>();
navAidInfo->reserve(15000);
// Read header
int idx = 0;
char *p = strtok(row, ",");
while (p != NULL)
{
if (!strcmp(p, "id"))
idCol = idx;
else if (!strcmp(p, "ident"))
identCol = idx;
else if (!strcmp(p, "type"))
typeCol = idx;
else if (!strcmp(p, "name"))
nameCol = idx;
else if (!strcmp(p, "frequency_khz"))
frequencyCol = idx;
else if (!strcmp(p, "latitude_deg"))
latitudeCol = idx;
else if (!strcmp(p, "longitude_deg"))
longitudeCol = idx;
else if (!strcmp(p, "elevation_ft"))
elevationCol = idx;
else if (!strcmp(p, "power"))
powerCol = idx;
p = strtok(NULL, ",");
idx++;
}
// Read data
while (fgets(row, sizeof(row), file))
{
int id = 0;
char *idString = NULL;
char *ident = NULL;
size_t identLen = 0;
char *type = NULL;
size_t typeLen = 0;
char *name = NULL;
size_t nameLen = 0;
char *frequencyString = NULL;
int frequency;
float latitude = 0.0f;
char *latitudeString = NULL;
size_t latitudeLen = 0;
float longitude = 0.0f;
char *longitudeString = NULL;
size_t longitudeLen = 0;
float elevation = 0.0f;
char *elevationString = NULL;
size_t elevationLen = 0;
char *power = NULL;
size_t powerLen = 0;
char *q = row;
idx = 0;
while ((p = csvNext(&q)) != nullptr)
{
// Read strings, stripping quotes
if (idx == idCol)
{
idString = p;
idString[strlen(idString)] = '\0';
id = strtol(idString, NULL, 10);
}
else if ((idx == identCol) && (p[0] == '\"'))
{
ident = p+1;
identLen = strlen(ident)-1;
ident[identLen] = '\0';
}
else if ((idx == typeCol) && (p[0] == '\"'))
{
type = p+1;
typeLen = strlen(type)-1;
type[typeLen] = '\0';
}
else if ((idx == nameCol) && (p[0] == '\"'))
{
name = p+1;
nameLen = strlen(name)-1;
name[nameLen] = '\0';
}
if (idx == frequencyCol)
{
frequencyString = p;
frequencyString[strlen(frequencyString)] = '\0';
frequency = strtol(frequencyString, NULL, 10);
}
else if (idx == latitudeCol)
{
latitudeString = p;
latitudeLen = strlen(latitudeString)-1;
latitudeString[latitudeLen] = '\0';
Use C locale in navaid parsing in VOR demods. Increase table size in VOR demod GUI so more than one row is visible.
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latitude = cLocale.toFloat(latitudeString);
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}
else if (idx == longitudeCol)
{
longitudeString = p;
longitudeLen = strlen(longitudeString)-1;
longitudeString[longitudeLen] = '\0';
Use C locale in navaid parsing in VOR demods. Increase table size in VOR demod GUI so more than one row is visible.
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longitude = cLocale.toFloat(longitudeString);
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}
else if (idx == elevationCol)
{
elevationString = p;
elevationLen = strlen(elevationString)-1;
elevationString[elevationLen] = '\0';
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elevation = cLocale.toFloat(elevationString);
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}
else if ((idx == powerCol) && (p[0] == '\"'))
{
power = p+1;
powerLen = strlen(power)-1;
power[powerLen] = '\0';
}
idx++;
}
// For now, we only want VORs
if (type && !strncmp(type, "VOR", 3))
{
NavAid *vor = new NavAid();
vor->m_id = id;
vor->m_ident = QString(ident);
// Check idents conform to our filtering rules
if (vor->m_ident.size() < 2)
qDebug() << "Warning: VOR Ident less than 2 characters: " << vor->m_ident;
else if (vor->m_ident.size() > 3)
qDebug() << "Warning: VOR Ident greater than 3 characters: " << vor->m_ident;
vor->m_type = QString(type);
vor->m_name = QString(name);
vor->m_frequencykHz = frequency;
vor->m_latitude = latitude;
vor->m_longitude = longitude;
vor->m_elevation = elevation;
if (power && !strcmp(power, "HIGH"))
vor->m_range = 100;
else if (power && !strcmp(power, "MEDIUM"))
vor->m_range = 40;
else
vor->m_range = 25;
vor->m_magneticDeclination = 0.0f;
vor->m_alignedTrueNorth = false;
navAidInfo->insert(id, vor);
cnt++;
}
}
}
fclose(file);
}
else
qDebug() << "NavAid::readNavAidsDB: Failed to open " << filename;
qDebug() << "NavAid::readNavAidsDB: Read " << cnt << " VORs";
return navAidInfo;
}
};
#endif // INCLUDE_NAVAID_H
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