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79 lines
2.5 KiB
79 lines
2.5 KiB
/**
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* Digital Voice Modem - Host Software
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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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* @package DVM / Host Software
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*
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*/
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//
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// Based on code from the MMDVMHost project. (https://github.com/g4klx/MMDVMHost)
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// Licensed under the GPLv2 License (https://opensource.org/licenses/GPL-2.0)
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//
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/*
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* Copyright (C) 2015,2016,2018,2021 by Jonathan Naylor G4KLX
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* Copyright (C) 2022 by Bryan Biedenkapp N2PLL
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#if !defined(__NXDN_EDAC__CONVOLUTION_H__)
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#define __NXDN_EDAC__CONVOLUTION_H__
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#include "Defines.h"
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#include <cstdint>
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namespace nxdn
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{
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namespace edac
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{
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// ---------------------------------------------------------------------------
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// Class Declaration
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// Implements NXDN frame convolution processing.
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// ---------------------------------------------------------------------------
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class HOST_SW_API Convolution {
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public:
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/// <summary>Initializes a new instance of the Convolution class.</summary>
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Convolution();
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/// <summary>Finalizes a instance of the Convolution class.</summary>
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~Convolution();
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/// <summary></summary>
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void start();
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/// <summary></summary>
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uint32_t chainback(uint8_t* out, uint32_t nBits);
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/// <summary></summary>
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bool decode(uint8_t s0, uint8_t s1);
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/// <summary></summary>
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void encode(const uint8_t* in, uint8_t* out, uint32_t nBits) const;
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private:
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uint16_t* m_metrics1;
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uint16_t* m_metrics2;
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uint16_t* m_oldMetrics;
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uint16_t* m_newMetrics;
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uint64_t* m_decisions;
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uint64_t* m_dp;
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};
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} // namespace edac
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} // namespace nxdn
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#endif // __NXDN_EDAC__CONVOLUTION_H__
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