106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
// P25 TDMA Decoder (C) Copyright 2013, 2014 Max H. Parke KA1RBI
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//
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// This file is part of OP25
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//
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// OP25 is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// OP25 is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// 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 OP25; see the file COPYING. If not, write to the Free
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// Software Foundation, Inc., 51 Franklin Street, Boston, MA
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// 02110-1301, USA.
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#ifndef INCLUDED_P25P2_TDMA_H
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#define INCLUDED_P25P2_TDMA_H
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#include <stdint.h>
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#include <deque>
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#include <vector>
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#include <gnuradio/msg_queue.h>
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#include "mbelib.h"
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#include "imbe_decoder.h"
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#include "software_imbe_decoder.h"
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#include "p25p2_duid.h"
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#include "p25p2_sync.h"
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#include "p25p2_vf.h"
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#include "p25p2_framer.h"
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#include "op25_audio.h"
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#include "log_ts.h"
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#include "ezpwd/rs"
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//class p25p2_tdma;
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class p25p2_tdma
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{
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public:
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p25p2_tdma(const op25_audio& udp, int slotid, int debug, bool do_msgq, gr::msg_queue::sptr queue, std::deque<int16_t> &qptr, bool do_audio_output, int msgq_id) ; // constructor
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int handle_packet(const uint8_t dibits[]) ;
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void set_slotid(int slotid);
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uint8_t* tdma_xormask;
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uint32_t symbols_received;
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uint32_t packets;
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~p25p2_tdma(); // destructor
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void set_xormask(const char*p);
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void set_nac(int nac) { d_nac = nac; }
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bool rx_sym(uint8_t sym);
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int handle_frame(void) ;
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private:
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p25p2_sync sync;
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p25p2_duid duid;
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p25p2_vf vf;
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int write_bufp;
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char write_buf[512];
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int d_slotid;
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int d_nac;
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mbe_parms cur_mp;
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mbe_parms prev_mp;
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mbe_parms enh_mp;
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software_imbe_decoder software_decoder;
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gr::msg_queue::sptr d_msg_queue;
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std::deque<int16_t> &output_queue_decode;
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bool d_do_msgq;
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bool d_do_audio_output;
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const op25_audio& op25audio;
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log_ts logts;
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int d_debug;
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int burst_id;
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inline int track_vb(int burst_type) { return burst_id = (burst_type == 0) ? (++burst_id % 5) : 4; }
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inline void reset_vb(void) { burst_id = -1; }
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ezpwd::RS<63,35> rs28; // Reed-Solomon decoder object
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std::vector<uint8_t> ESS_A; // ESS_A and ESS_B are hexbits vectors
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std::vector<uint8_t> ESS_B;
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uint16_t ess_keyid;
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uint16_t ess_algid;
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uint8_t ess_mi[9] = {0};
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int d_msgq_id;
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p25p2_framer p2framer;
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int handle_acch_frame(const uint8_t dibits[], bool fast, bool is_lcch) ;
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void handle_voice_frame(const uint8_t dibits[]) ;
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int process_mac_pdu(const uint8_t byte_buf[], const unsigned int len) ;
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void handle_mac_signal(const uint8_t byte_buf[], const unsigned int len) ;
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void handle_mac_ptt(const uint8_t byte_buf[], const unsigned int len) ;
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void handle_mac_end_ptt(const uint8_t byte_buf[], const unsigned int len) ;
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void handle_mac_idle(const uint8_t byte_buf[], const unsigned int len) ;
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void handle_mac_active(const uint8_t byte_buf[], const unsigned int len) ;
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void handle_mac_hangtime(const uint8_t byte_buf[], const unsigned int len) ;
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void decode_mac_msg(const uint8_t byte_buf[], const unsigned int len) ;
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void handle_4V2V_ess(const uint8_t dibits[]);
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inline bool encrypted() { return (ess_algid != 0x80); }
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void send_msg(const std::string msg_str, long msg_type);
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};
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#endif /* INCLUDED_P25P2_TDMA_H */
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