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Finally process the Golay(24,12,8) parity bit.

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This commit is contained in:
Jonathan Naylor
2021-03-27 20:00:53 +00:00
parent 4422444179
commit 6ac672e106
8 changed files with 63 additions and 67 deletions
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14
YSFFICH.cpp
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@@ -1,5 +1,5 @@
/*
* Copyright (C) 2016,2017,2019,2020 by Jonathan Naylor G4KLX
* Copyright (C) 2016,2017,2019,2020,2021 by Jonathan Naylor G4KLX
*
* 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
@@ -99,10 +99,14 @@ bool CYSFFICH::decode(const unsigned char* bytes)
unsigned char output[13U];
viterbi.chainback(output, 96U);
unsigned int b0 = CGolay24128::decode24128(output + 0U);
unsigned int b1 = CGolay24128::decode24128(output + 3U);
unsigned int b2 = CGolay24128::decode24128(output + 6U);
unsigned int b3 = CGolay24128::decode24128(output + 9U);
bool valid1, valid2, valid3, valid4;
unsigned int b0 = CGolay24128::decode24128(output + 0U, valid1);
unsigned int b1 = CGolay24128::decode24128(output + 3U, valid2);
unsigned int b2 = CGolay24128::decode24128(output + 6U, valid3);
unsigned int b3 = CGolay24128::decode24128(output + 9U, valid4);
if (!valid1 || !valid2 || !valid3 || !valid4)
return false;
m_fich[0U] = (b0 >> 4) & 0xFFU;
m_fich[1U] = ((b0 << 4) & 0xF0U) | ((b1 >> 8) & 0x0FU);