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"
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#include "rssi_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;
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::square_taps_38k4_1t_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);
void on_message(const Message* const message);
void on_beep_message(const AudioBeepMessage& message);
/* NB: Threads should be the last members in the class definition. */
BasebandThread baseband_thread{
baseband_fs, this, baseband::Direction::Receive, /*auto_start*/ false};
RSSIThread rssi_thread{};
};
#endif /*__PROC_AIS_H__*/