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64 lines
2.5 KiB
C++
64 lines
2.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2015 F4EXB //
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// written by Edouard Griffiths //
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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 as version 3 of the License, or //
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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 V3 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, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef PLUGINS_CHANNEL_BFM_RDSDECODER_H_
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#define PLUGINS_CHANNEL_BFM_RDSDECODER_H_
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class RDSDecoder
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{
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public:
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RDSDecoder();
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~RDSDecoder();
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bool frameSync(bool bit);
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unsigned int *getGroup() { return m_group; }
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bool synced() const { return m_sync == SYNC; }
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float m_qua;
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protected:
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unsigned int calc_syndrome(unsigned long message, unsigned char mlen);
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void enter_sync(unsigned int sync_block_number);
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void enter_no_sync();
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private:
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unsigned long m_reg;
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enum { NO_SYNC, SYNC } m_sync;
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bool m_presync;
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unsigned long m_lastseenOffsetCounter;
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unsigned long m_bitCounter;
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unsigned char m_lastseenOffset;
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unsigned int m_blockBitCounter;
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unsigned int m_wrongBlocksCounter;
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unsigned int m_blocksCounter;
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unsigned int m_groupGoodBlocksCounter;
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unsigned char m_blockNumber;
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bool m_groupAssemblyStarted;
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bool m_goodBlock;
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unsigned int m_group[4];
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/* see page 59, Annex C, table C.1 in the standard
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* offset word C' has been put at the end */
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static const unsigned int offset_pos[5];
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static const unsigned int offset_word[5];
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static const unsigned int syndrome[5];
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};
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#endif /* PLUGINS_CHANNEL_BFM_RDSDECODER_H_ */
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