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Compacting Hash/List definitions, adding a few comments for future OSS contributors

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This commit is contained in:
Peter Beckman 2022-01-20 14:48:26 -05:00
parent 9e5ebe0f1d
commit f75c77f47c
1 changed files with 21 additions and 16 deletions
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37
sdrbase/util/aprs.cpp
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@ -1037,15 +1037,16 @@ bool APRSPacket::parseMicE(QString& info, int& idx, QString& dest)
float latitudeDirection = 1; // Assume North
float longitudeDirection = -1; // Assume West
QHash<QString, QString> messageTypeLookup;
messageTypeLookup["111"] = "Off Duty";
messageTypeLookup["110"] = "En Route";
messageTypeLookup["101"] = "In Service";
messageTypeLookup["100"] = "Returning";
messageTypeLookup["011"] = "Committed";
messageTypeLookup["010"] = "Special";
messageTypeLookup["001"] = "Priority";
messageTypeLookup["000"] = "Emergency";
QHash<QString, QString> messageTypeLookup = {
{"111", "Off Duty"},
{"110", "En Route"},
{"101", "In Service"},
{"100", "Returning"},
{"011", "Committed"},
{"010", "Special"},
{"001", "Priority"},
{"000", "Emergency"}
};
QRegularExpression re("^[A-LP-Z0-9]{3}[L-Z0-9]{3}.?$"); // 6-7 bytes
if (re.match(dest).hasMatch()) {
@ -1163,15 +1164,18 @@ bool APRSPacket::parseMicE(QString& info, int& idx, QString& dest)
m_hasSymbol = true;
}
// Altitude, encoded in Status Message
// Altitude, encoded in Status Message in meters, converted to feet, above -10000 meters
// e.g. "4T} -> Doublequote is 34, digit 4 is 52, Capital T is 84. Subtract 33 from each -> 1, 19, 51
// Multiply -> (1 * 91 * 91) + (19 * 91) + (51 * 1) - 10000 = 61 meters Mean Sea Level (MSL)
// ASCII Integer Character Range is 33 to 127
float altitude = -10000;
QRegularExpression re_mice_altitude("[\]>]?(.{3})}"); // 4-5 bytes, we only need the 3 to get altitude, e.g. "4T}
// 4-5 bytes, we only need the 3 to get altitude, e.g. "4T}
// Some HTs prefix the altitude with ']' or '>', so we match that optionally but ignore it
QRegularExpression re_mice_altitude("[\]>]?(.{3})}");
QRegularExpressionMatch altitude_str = re_mice_altitude.match(info);
if (altitude_str.hasMatch()) {
QHash<int, int> micEAltitudeMultipliers;
micEAltitudeMultipliers[0] = 91 * 91;
micEAltitudeMultipliers[1] = 91;
micEAltitudeMultipliers[2] = 1;
QList<int> micEAltitudeMultipliers = {91 * 91, 91, 1};
for (int i = 0; i < 3; i++) {
QString altmatch = altitude_str.captured(1);
@ -1180,9 +1184,10 @@ bool APRSPacket::parseMicE(QString& info, int& idx, QString& dest)
qDebug() << "APRSPacket::parseMicE: Invalid Altitude Byte Found pos:" << QString::number(i) << " ascii int:" << QString::number(charInt);
break;
}
altitude += micEAltitudeMultipliers[i] * (float)(charInt - 33);
altitude += (float)(charInt - 33) * micEAltitudeMultipliers.at(i);
}
// Assume that the Mic-E transmission is Above Ground Level
if (altitude >= 0) {
m_altitudeFt = std::round(Units::metresToFeet(altitude));
m_hasAltitude = true;