50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
/* -*- c++ -*- */
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/*
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* construct P25 frames out of raw dibits
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* Copyright 2010, KA1RBI
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*
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* usage: after constructing, call rx_sym once per received dibit.
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* frame fields are available for inspection when true is returned
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*/
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#ifndef INCLUDED_P25_FRAMER_H
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#define INCLUDED_P25_FRAMER_H
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class p25_framer;
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class p25_framer
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{
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private:
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typedef std::vector<bool> bit_vector;
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// internal functions
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bool nid_codeword(uint64_t acc);
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// internal instance variables and state
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uint8_t reverse_p;
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int nid_syms;
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uint32_t next_bit;
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uint64_t nid_accum;
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uint32_t frame_size_limit;
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int d_debug;
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int d_msgq_id;
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public:
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p25_framer(int debug = 0, int msgq_id=0);
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~p25_framer (); // destructor
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bool rx_sym(uint8_t dibit) ;
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uint32_t symbols_received;
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// info from received frame
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uint64_t nid_word; // received NID word
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uint32_t nac; // extracted NAC
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uint32_t duid; // extracted DUID
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uint8_t parity; // extracted DUID parity
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bit_vector frame_body; // all bits in frame
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uint32_t frame_size; // number of bits in frame_body
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uint32_t bch_errors; // number of errors detected in bch
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};
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#endif /* INCLUDED_P25_FRAMER_H */
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