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60 lines
1.8 KiB
60 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Digital Voice Modem - Common Library
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* GPLv2 Open Source. Use is subject to license terms.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright (C) 2015 Jonathan Naylor, G4KLX
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*
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*/
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/**
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* @file Golay2087.h
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* @ingroup edac
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* @file Golay2087.cpp
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* @ingroup edac
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*/
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#if !defined(__GOLAY2087_H__)
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#define __GOLAY2087_H__
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#include "common/Defines.h"
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namespace edac
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{
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// ---------------------------------------------------------------------------
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// Class Declaration
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// ---------------------------------------------------------------------------
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/**
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* @brief Implements Golay (20,8,7) forward error correction.
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* @ingroup edac
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*/
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class HOST_SW_API Golay2087 {
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public:
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/**
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* @brief Decode Golay (20,8,7) FEC.
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* @param bytes Golay FEC encoded data byte array.
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* @returns uint8_t
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*/
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static uint8_t decode(const uint8_t* data);
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/**
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* @brief Encode Golay (20,8,7) FEC.
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* @param data Data to encode with Golay FEC.
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*/
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static void encode(uint8_t* data);
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private:
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/**
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* @brief Compute the syndrome corresponding to the given pattern, i.e., the
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* remainder after dividing the pattern (when considering it as the vector
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* representation of a polynomial) by the generator polynomial, GENPOL.
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* In the program this pattern has several meanings: (1) pattern = information
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* bits, when constructing the encoding table; (2) pattern = error pattern,
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* when constructing the decoding table; and (3) pattern = received vector, to
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* obtain its syndrome in decoding.
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*/
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static uint32_t getSyndrome1987(uint32_t pattern);
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};
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} // namespace edac
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#endif // __GOLAY2087_H__
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