portapack-mayhem/firmware/baseband/proc_ais.hpp

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/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef __PROC_AIS_H__
#define __PROC_AIS_H__
#include "baseband_processor.hpp"
#include "baseband_thread.hpp"
#include "channel_decimator.hpp"
#include "matched_filter.hpp"
#include "clock_recovery.hpp"
#include "symbol_coding.hpp"
#include "packet_builder.hpp"
#include "baseband_packet.hpp"
#include "message.hpp"
#include <cstdint>
#include <cstddef>
#include <bitset>
#include "ais_baseband.hpp"
class AISProcessor : public BasebandProcessor {
public:
AISProcessor();
void execute(const buffer_c8_t& buffer) override;
private:
static constexpr size_t baseband_fs = 2457600;
BasebandThread baseband_thread { baseband_fs, this, NORMALPRIO + 20 };
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0;
dsp::decimate::FIRC16xR16x32Decim8 decim_1;
dsp::matched_filter::MatchedFilter mf { baseband::ais::rrc_taps_38k4_4t_p, 2 };
clock_recovery::ClockRecovery<clock_recovery::FixedErrorFilter> clock_recovery {
19200, 9600, { 0.0555f },
[this](const float symbol) { this->consume_symbol(symbol); }
};
symbol_coding::NRZIDecoder nrzi_decode;
PacketBuilder<BitPattern, BitPattern, BitPattern> packet_builder {
{ 0b0101010101111110, 16, 1 },
{ 0b111110, 6 },
{ 0b01111110, 8 },
[this](const baseband::Packet& packet) {
this->payload_handler(packet);
}
};
void consume_symbol(const float symbol);
void payload_handler(const baseband::Packet& packet);
};
#endif/*__PROC_AIS_H__*/