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#2120 DMR Decoder resolves index out of bounds error and also updates Hamming 16/17 decoders to correctly identify multi-bit errors when the hamming parity bit is the syndrome. (#2121)

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Co-authored-by: Dennis Sheirer <dsheirer@github.com>
This commit is contained in:
Denny Sheirer
2025-01-01 09:51:41 -05:00
committed by GitHub
parent 70fb74b787
commit 694ea83a80
3 changed files with 50 additions and 12 deletions
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9
src/main/java/io/github/dsheirer/edac/Hamming16.java
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@@ -1,6 +1,6 @@
/*
* *****************************************************************************
* Copyright (C) 2014-2024 Dennis Sheirer
* Copyright (C) 2014-2025 Dennis Sheirer
*
* 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
@@ -47,6 +47,13 @@ public class Hamming16 implements IHamming
return NO_ERRORS;
}
//If the syndrome indicates the error is in the final parity bit position, and we already have odd parity, then
//flag it as invalid for multiple errors.
if(syndrome == 1 && message.getSubMessage(offset, offset + 16).cardinality() % 2 == 1) //check final parity bit
{
return MULTIPLE_ERRORS;
}
for(int index = 0; index < CHECKSUMS.length; index++)
{
if(syndrome == CHECKSUMS[index])