mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 03:34:35 +00:00
033c4e9a5b
* Updated style * Updated files * fixed new line * Updated spacing * File fix WIP * Updated to clang 13 * updated comment style * Removed old comment code
144 lines
3.5 KiB
C++
144 lines
3.5 KiB
C++
/*
|
|
* 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 __AIS_PACKET_H__
|
|
#define __AIS_PACKET_H__
|
|
|
|
#include "baseband_packet.hpp"
|
|
#include "field_reader.hpp"
|
|
|
|
#include <cstdint>
|
|
#include <cstddef>
|
|
#include <string>
|
|
|
|
namespace ais {
|
|
|
|
struct DateTime {
|
|
uint16_t year;
|
|
uint8_t month;
|
|
uint8_t day;
|
|
uint8_t hour;
|
|
uint8_t minute;
|
|
uint8_t second;
|
|
};
|
|
|
|
template <size_t FieldSize, int32_t DegMax, uint32_t NAValue>
|
|
struct LatLonBase {
|
|
constexpr LatLonBase()
|
|
: LatLonBase{raw_not_available} {
|
|
}
|
|
|
|
constexpr LatLonBase(
|
|
const int32_t raw)
|
|
: raw_{raw} {
|
|
}
|
|
|
|
constexpr LatLonBase(
|
|
const LatLonBase& other)
|
|
: raw_{other.raw_} {
|
|
}
|
|
|
|
LatLonBase& operator=(const LatLonBase&) = default;
|
|
|
|
int32_t normalized() const {
|
|
return static_cast<int32_t>(raw() << sign_extend_shift) / (1 << sign_extend_shift);
|
|
}
|
|
|
|
int32_t raw() const {
|
|
return raw_;
|
|
}
|
|
|
|
bool is_not_available() const {
|
|
return raw() == raw_not_available;
|
|
}
|
|
|
|
bool is_valid() const {
|
|
return (normalized() >= raw_valid_min) && (normalized() <= raw_valid_max);
|
|
}
|
|
|
|
private:
|
|
int32_t raw_;
|
|
|
|
static constexpr size_t sign_extend_shift = 32 - FieldSize;
|
|
|
|
static constexpr int32_t raw_not_available = NAValue;
|
|
static constexpr int32_t raw_valid_min = -DegMax * 60 * 10000;
|
|
static constexpr int32_t raw_valid_max = DegMax * 60 * 10000;
|
|
};
|
|
|
|
using Latitude = LatLonBase<27, 90, 0x3412140>;
|
|
using Longitude = LatLonBase<28, 180, 0x6791AC0>;
|
|
|
|
using RateOfTurn = int8_t;
|
|
using SpeedOverGround = uint16_t;
|
|
using CourseOverGround = uint16_t;
|
|
using TrueHeading = uint16_t;
|
|
|
|
using MMSI = uint32_t;
|
|
|
|
class Packet {
|
|
public:
|
|
constexpr Packet(
|
|
const baseband::Packet& packet)
|
|
: packet_{packet},
|
|
field_{packet_} {
|
|
}
|
|
|
|
size_t length() const;
|
|
|
|
bool is_valid() const;
|
|
|
|
Timestamp received_at() const;
|
|
|
|
uint32_t message_id() const;
|
|
MMSI user_id() const;
|
|
MMSI source_id() const;
|
|
|
|
uint32_t read(const size_t start_bit, const size_t length) const;
|
|
|
|
std::string text(const size_t start_bit, const size_t character_count) const;
|
|
|
|
DateTime datetime(const size_t start_bit) const;
|
|
|
|
Latitude latitude(const size_t start_bit) const;
|
|
Longitude longitude(const size_t start_bit) const;
|
|
|
|
bool crc_ok() const;
|
|
|
|
private:
|
|
using Reader = FieldReader<baseband::Packet, BitRemapByteReverse>;
|
|
using CRCReader = FieldReader<baseband::Packet, BitRemapNone>;
|
|
|
|
const baseband::Packet packet_;
|
|
const Reader field_;
|
|
|
|
const size_t fcs_length = 16;
|
|
|
|
size_t data_and_fcs_length() const;
|
|
size_t data_length() const;
|
|
|
|
bool length_valid() const;
|
|
};
|
|
|
|
} /* namespace ais */
|
|
|
|
#endif /*__AIS_PACKET_H__*/
|