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progressive errors

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kuba
2026-04-03 15:08:47 +02:00
parent 98b48d5811
commit 96fec88b52
2 changed files with 51 additions and 28 deletions
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server/rds.js
+50 -27
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@@ -152,11 +152,11 @@ class RDSDecoder {
clear() {
this.data.pi = '?';
this.ps = Array(8).fill(' ');
this.ps_errors = Array(8).fill("0");
this.ps_errors = Array(8).fill("10");
this.rt0 = Array(64).fill(' ');
this.rt0_errors = Array(64).fill("0");
this.rt0_errors = Array(64).fill("10");
this.rt1 = Array(64).fill(' ');
this.rt1_errors = Array(64).fill("0");
this.rt1_errors = Array(64).fill("10");
this.data.ps = '';
this.data.rt1 = '';
this.data.rt0 = '';
@@ -168,10 +168,12 @@ class RDSDecoder {
this.rt1_to_clear = false;
this.rt0_to_clear = false;
this.data.ecc = null;
this.ecc_error = 3;
this.data.country_name = ""
this.data.country_iso = "UN"
this.af_len = 0;
this.af_len_error = 3;
this.data.af = []
this.af_am_follows = false;
@@ -185,7 +187,7 @@ class RDSDecoder {
const d_error = error & 3;
if(this.last_pi_error > a_error) {
this.data.pi = blockA.toString(16).toUpperCase().padStart(4, '0');
this.data.pi = blockA.toString(16).toUpperCase().padStart(4, '0') + ("?".repeat(a_error));
this.last_pi_error = a_error;
}
@@ -209,12 +211,13 @@ class RDSDecoder {
if(af_high >= BASE && af_high <= (BASE+25)) {
this.af_len = af_high-BASE;
if(this.af_len !== this.data.af.length) {
if(this.af_len !== this.data.af.length && c_error < this.af_len_error) {
this.data.af = [];
this.af_am_follows = false;
if(af_low != FILLER && af_low != AM_FOLLOWS) this.data.af.push((af_low+875)*100)
else if(af_low == AM_FOLLOWS) this.af_am_follows = true;
this.af_len_error = c_error;
}
} else if(this.data.af.length != this.af_len) {
if(!(af_high == AM_FOLLOWS || this.af_am_follows)) {
@@ -235,11 +238,13 @@ class RDSDecoder {
const idx = blockB & 0x3;
const last_err = this.ps_errors[idx * 2];
const cur_err = Math.ceil(d_error * (10/3));
const cur_err = Math.ceil(d_error * (10/3)); // They expect an error score of 0-10 with 10 being the worst. Too bad we don't have that resolution
const character_a = decode_charset(blockD >> 8);
const character_b = decode_charset(blockD & 0xFF);
if(last_err < cur_err && this.ps[idx * 2] == character_a && this.ps[idx * 2 + 1] == character_b) return;
// TODO: Maybe add an option for toggling whether to check content?
if(last_err < cur_err) return;
// if(last_err < cur_err && this.ps[idx * 2] == character_a && this.ps[idx * 2 + 1] == character_b) return;
this.ps[idx * 2] = character_a;
this.ps[idx * 2 + 1] = character_b;
@@ -253,10 +258,12 @@ class RDSDecoder {
var variant_code = (blockC >> 12) & 0x7;
switch (variant_code) {
case 0:
if(c_error > this.ecc_error) break;
this.data.ecc = blockC & 0xff;
this.data.country_name = rdsEccLookup(blockA, this.data.ecc);
if(this.data.country_name.length === 0) this.data.country_iso = "UN";
else this.data.country_iso = iso[countries.indexOf(this.data.country_name)]
this.ecc_error = c_error
break;
default: break;
}
@@ -272,17 +279,25 @@ class RDSDecoder {
}
if(c_error < 2 && multiplier !== 2) {
this.rt1[idx * multiplier] = decode_charset(blockC >> 8);
this.rt1[idx * multiplier + 1] = decode_charset(blockC & 0xFF);
this.rt1_errors[idx * multiplier] = Math.ceil(c_error * (10/3));
this.rt1_errors[idx * multiplier + 1] = Math.ceil(c_error * (10/3));
const err = Math.ceil(c_error * (10/3));
const old_err = this.rt1_errors[idx * multiplier];
if(err < old_err) {
this.rt1[idx * multiplier] = decode_charset(blockC >> 8);
this.rt1[idx * multiplier + 1] = decode_charset(blockC & 0xFF);
this.rt1_errors[idx * multiplier] = err;
this.rt1_errors[idx * multiplier + 1] = err;
}
}
if(d_error < 2) {
var offset = (multiplier == 2) ? 0 : 2;
this.rt1[idx * multiplier + offset] = decode_charset(blockD >> 8);
this.rt1[idx * multiplier + offset + 1] = decode_charset(blockD & 0xFF);
this.rt1_errors[idx * multiplier + offset] = Math.ceil(d_error * (10/3));
this.rt1_errors[idx * multiplier + offset + 1] = Math.ceil(d_error * (10/3));
const offset = (multiplier == 2) ? 0 : 2;
const err = Math.ceil(d_error * (10/3));
const old_err = this.rt1_errors[idx * multiplier + offset];
if(err < old_err) {
this.rt1[idx * multiplier + offset] = decode_charset(blockD >> 8);
this.rt1[idx * multiplier + offset + 1] = decode_charset(blockD & 0xFF);
this.rt1_errors[idx * multiplier + offset] = err;
this.rt1_errors[idx * multiplier + offset + 1] = err;
}
}
var i = this.rt1.indexOf("\r")
@@ -302,18 +317,26 @@ class RDSDecoder {
this.rt0_to_clear = false;
}
if(c_error !== 3 && multiplier !== 2) {
this.rt0[idx * multiplier] = decode_charset(blockC >> 8);
this.rt0[idx * multiplier + 1] = decode_charset(blockC & 0xFF);
this.rt0_errors[idx * multiplier] = Math.ceil(c_error * (10/3));
this.rt0_errors[idx * multiplier + 1] = Math.ceil(c_error * (10/3));
if(c_error < 2 && multiplier !== 2) {
const err = Math.ceil(c_error * (10/3));
const old_err = this.rt0_errors[idx * multiplier];
if(err < old_err) {
this.rt0[idx * multiplier] = decode_charset(blockC >> 8);
this.rt0[idx * multiplier + 1] = decode_charset(blockC & 0xFF);
this.rt0_errors[idx * multiplier] = err;
this.rt0_errors[idx * multiplier + 1] = err;
}
}
if(d_error !== 3) {
var offset = (multiplier == 2) ? 0 : 2;
this.rt0[idx * multiplier + offset] = decode_charset(blockD >> 8);
this.rt0[idx * multiplier + offset + 1] = decode_charset(blockD & 0xFF);
this.rt0_errors[idx * multiplier + offset] = Math.ceil(d_error * (10/3));
this.rt0_errors[idx * multiplier + offset + 1] = Math.ceil(d_error * (10/3));
if(d_error < 2) {
const offset = (multiplier == 2) ? 0 : 2;
const err = Math.ceil(d_error * (10/3));
const old_err = this.rt1_errors[idx * multiplier + offset];
if(err < old_err) {
this.rt0[idx * multiplier + offset] = decode_charset(blockD >> 8);
this.rt0[idx * multiplier + offset + 1] = decode_charset(blockD & 0xFF);
this.rt0_errors[idx * multiplier + offset] = err;
this.rt0_errors[idx * multiplier + offset + 1] = err;
}
}
var i = this.rt0.indexOf("\r");