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fix north americal RDS callsign decoding

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AlexandreRouma 2024-01-29 23:57:23 +01:00
parent a8ed213ed3
commit f0bd17f9f4
2 changed files with 143 additions and 7 deletions
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147
decoder_modules/radio/src/rds.cpp
View File

@ -22,6 +22,98 @@ namespace rds {
{ BLOCK_TYPE_D, 0b0110110100 }
};
std::map<uint16_t, const char*> THREE_LETTER_CALLS = {
{ 0x99A5, "KBW" },
{ 0x99A6, "KCY" },
{ 0x9990, "KDB" },
{ 0x99A7, "KDF" },
{ 0x9950, "KEX" },
{ 0x9951, "KFH" },
{ 0x9952, "KFI" },
{ 0x9953, "KGA" },
{ 0x9991, "KGB" },
{ 0x9954, "KGO" },
{ 0x9955, "KGU" },
{ 0x9956, "KGW" },
{ 0x9957, "KGY" },
{ 0x99AA, "KHQ" },
{ 0x9958, "KID" },
{ 0x9959, "KIT" },
{ 0x995A, "KJR" },
{ 0x995B, "KLO" },
{ 0x995C, "KLZ" },
{ 0x995D, "KMA" },
{ 0x995E, "KMJ" },
{ 0x995F, "KNX" },
{ 0x9960, "KOA" },
{ 0x99AB, "KOB" },
{ 0x9992, "KOY" },
{ 0x9993, "KPQ" },
{ 0x9964, "KQV" },
{ 0x9994, "KSD" },
{ 0x9965, "KSL" },
{ 0x9966, "KUJ" },
{ 0x9995, "KUT" },
{ 0x9967, "KVI" },
{ 0x9968, "KWG" },
{ 0x9996, "KXL" },
{ 0x9997, "KXO" },
{ 0x996B, "KYW" },
{ 0x9999, "WBT" },
{ 0x996D, "WBZ" },
{ 0x996E, "WDZ" },
{ 0x996F, "WEW" },
{ 0x999A, "WGH" },
{ 0x9971, "WGL" },
{ 0x9972, "WGN" },
{ 0x9973, "WGR" },
{ 0x999B, "WGY" },
{ 0x9975, "WHA" },
{ 0x9976, "WHB" },
{ 0x9977, "WHK" },
{ 0x9978, "WHO" },
{ 0x999C, "WHP" },
{ 0x999D, "WIL" },
{ 0x997A, "WIP" },
{ 0x99B3, "WIS" },
{ 0x997B, "WJR" },
{ 0x99B4, "WJW" },
{ 0x99B5, "WJZ" },
{ 0x997C, "WKY" },
{ 0x997D, "WLS" },
{ 0x997E, "WLW" },
{ 0x999E, "WMC" },
{ 0x999F, "WMT" },
{ 0x9981, "WOC" },
{ 0x99A0, "WOI" },
{ 0x9983, "WOL" },
{ 0x9984, "WOR" },
{ 0x99A1, "WOW" },
{ 0x99B9, "WRC" },
{ 0x99A2, "WRR" },
{ 0x99A3, "WSB" },
{ 0x99A4, "WSM" },
{ 0x9988, "WWJ" },
{ 0x9989, "WWL" }
};
std::map<uint16_t, const char*> NAT_LOC_LINKED_STATIONS = {
{ 0xB01, "NPR-1" },
{ 0xB02, "CBC - Radio One" },
{ 0xB03, "CBC - Radio Two" },
{ 0xB04, "Radio-Canada - Première Chaîne" },
{ 0xB05, "Radio-Canada - Espace Musique" },
{ 0xB06, "CBC" },
{ 0xB07, "CBC" },
{ 0xB08, "CBC" },
{ 0xB09, "CBC" },
{ 0xB0A, "NPR-2" },
{ 0xB0B, "NPR-3" },
{ 0xB0C, "NPR-4" },
{ 0xB0D, "NPR-5" },
{ 0xB0E, "NPR-6" }
};
// 9876543210
const uint16_t LFSR_POLY = 0b0110111001;
const uint16_t IN_POLY = 0b1100011011;
@ -146,7 +238,7 @@ namespace rds {
countryCode = (blocks[BLOCK_TYPE_A] >> 22) & 0xF;
programCoverage = (AreaCoverage)((blocks[BLOCK_TYPE_A] >> 18) & 0xF);
programRefNumber = (blocks[BLOCK_TYPE_A] >> 10) & 0xFF;
decodeCallsign();
callsign = decodeCallsign(piCode);
// Update timeout
blockALastUpdate = std::chrono::high_resolution_clock::now();;
@ -287,7 +379,7 @@ namespace rds {
// Decode block B
decodeBlockB();
//flog::debug("RDS Group {}{}", groupType, (groupVer == GROUP_VER_A) ? 'A':'B');
flog::debug("RDS Group {}{}", groupType, (groupVer == GROUP_VER_A) ? 'A':'B');
// Decode depending on group type
switch (groupType) {
@ -305,14 +397,14 @@ namespace rds {
}
}
void Decoder::decodeCallsign() {
std::string Decoder::base26ToCall(uint16_t pi) {
// Determin first better based on offset
bool w = (piCode >= 21672);
callsign = w ? 'W' : 'K';
bool w = (pi >= 21672);
std::string callsign(w ? "W" : "K");
// Base25 decode the rest
std::string restStr;
int rest = piCode - (w ? 21672 : 4096);
int rest = pi - (w ? 21672 : 4096);
while (rest) {
restStr += 'A' + (rest % 26);
rest /= 26;
@ -322,6 +414,49 @@ namespace rds {
for (int i = restStr.size() - 1; i >= 0; i--) {
callsign += restStr[i];
}
return callsign;
}
std::string Decoder::decodeCallsign(uint16_t pi) {
if ((pi >> 8) == 0xAF) {
// AFXY -> XY00
return base26ToCall((pi & 0xFF) << 8);
}
else if ((pi >> 12) == 0xA) {
// AXYZ -> X0YZ
return base26ToCall((((pi >> 8) & 0xF) << 12) | (pi & 0xFF));
}
else if (pi >= 0x9950 && pi <= 0x9EFF) {
// 3 letter callsigns
if (THREE_LETTER_CALLS.find(pi) != THREE_LETTER_CALLS.end()) {
return THREE_LETTER_CALLS[pi];
}
else {
return "Not Assigned";
}
}
else if (pi >= 0x1000 && pi <= 0x994F) {
// Normal encoding
if ((pi & 0xFF) == 0 || ((pi >> 8) & 0xF) == 0) {
return "Not Assigned";
}
else {
return base26ToCall(pi);
}
}
else if (pi >= 0xB000 && pi <= 0xEFFF) {
uint16_t _pi = ((pi >> 12) << 8) | (pi & 0xFF);
if (NAT_LOC_LINKED_STATIONS.find(_pi) != NAT_LOC_LINKED_STATIONS.end()) {
return NAT_LOC_LINKED_STATIONS[_pi];
}
else {
return "Not Assigned";
}
}
else {
return "Not Assigned";
}
}
bool Decoder::blockAValid() {

3
decoder_modules/radio/src/rds.h
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@ -246,7 +246,8 @@ namespace rds {
void decodeGroup10();
void decodeGroup();
void decodeCallsign();
static std::string base26ToCall(uint16_t pi);
static std::string decodeCallsign(uint16_t pi);
bool blockAValid();
bool blockBValid();