136 lines
5.7 KiB
Python
136 lines
5.7 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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CLI: AIS fields (type, MMSI, lat/lon, …) -> NRZI bit stream (and optional packed bytes).
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Uses AIVDM_Encoder.py in the parent directory for the PDU, then phy.build_nrzi_frame
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(same stages as gr-aistx Build_Frame: CRC, reverse, stuff, flags, NRZI).
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"""
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from __future__ import annotations
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import argparse
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import os
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import sys
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# Каталог со скриптом (phy.py) и корень репозитория (опционально AIVDM_Encoder.py)
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_SCRIPT_DIR = os.path.abspath(os.path.dirname(__file__))
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_ROOT = os.path.abspath(os.path.join(_SCRIPT_DIR, ".."))
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for _p in (_SCRIPT_DIR, _ROOT):
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if _p not in sys.path:
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sys.path.insert(0, _p)
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from phy import build_nrzi_frame, nrzi_bits_to_bytes # noqa: E402
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try:
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import AIVDM_Encoder as enc # noqa: E402
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except ImportError:
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enc = None # type: ignore
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def build_payload(options) -> str:
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if enc is None:
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raise SystemExit(
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"AIVDM_Encoder.py не найден в корне репозитория. "
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"Для веб-транспондера используйте pyais + опцию «Кодер: phy.py»."
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)
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t = options.type
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if t == 1:
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return enc.encode_1(
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int(options.mmsi), int(options.status), float(options.speed),
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float(options.lon), float(options.lat), float(options.course), int(options.ts),
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)
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if t == 4:
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return enc.encode_4(
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int(options.mmsi), float(options.speed),
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float(options.lon), float(options.lat), float(options.course), int(options.ts),
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)
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if t == 14:
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return enc.encode_14(int(options.mmsi), options.sart_msg)
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if t == 18:
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return enc.encode_18(
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int(options.mmsi), float(options.speed),
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float(options.lon), float(options.lat), float(options.course), int(options.ts),
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)
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if t == 20:
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return enc.encode_20(
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int(options.mmsi), int(options.fatdmaoffset), int(options.fatdmaslots),
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int(options.fatdmatimeout), int(options.fatdmaincrement),
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)
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if t == 21:
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v = 1 if options.v_AtoN else 0
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return enc.encode_21(
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int(options.mmsi), int(options.aid_type), options.aid_name,
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float(options.lon), float(options.lat), options.vsize, v,
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)
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if t == 22:
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return enc.encode_22(
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int(options.mmsi), int(options.channel_a), int(options.channel_b),
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float(options.ne_lon), float(options.ne_lat), float(options.sw_lon), float(options.sw_lat),
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)
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if t == 23:
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return enc.encode_23(
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int(options.mmsi), float(options.ne_lon), float(options.ne_lat),
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float(options.sw_lon), float(options.sw_lat), int(options.interval), int(options.quiet),
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)
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if t == 24:
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if options.part.upper() == "A":
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return enc.encode_24(int(options.mmsi), "A", __vname=options.vname.upper())
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return enc.encode_24(
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int(options.mmsi), "B",
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__callsign=options.callsign.upper(), __vsize=options.vsize, __vtype=int(options.vtype),
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)
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raise SystemExit("Unsupported type %r" % (t,))
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def main() -> None:
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p = argparse.ArgumentParser(description="AIS parameters -> NRZI bit frame (gr-aistx-compatible chain).")
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p.add_argument("--type", type=int, required=True, help="AIS message type (1,4,14,18,20-24)")
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p.add_argument("--mmsi", type=int, default=247320162)
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p.add_argument("--lat", type=float, default=45.6910166666667, help="Latitude (types 1,4,18,21,22,23)")
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p.add_argument("--lon", type=float, default=9.72357833333333, help="Longitude (alias for encoder --long)")
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p.add_argument("--speed", type=float, default=0.1)
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p.add_argument("--course", type=float, default=83.4)
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p.add_argument("--ts", type=int, default=38)
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p.add_argument("--status", type=int, default=15)
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p.add_argument("--sart-msg", dest="sart_msg", default="SART ACTIVE")
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p.add_argument("--fatdmaoffset", type=int, default=0)
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p.add_argument("--fatdmaslots", type=int, default=0)
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p.add_argument("--fatdmatimeout", type=int, default=0)
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p.add_argument("--fatdmaincrement", type=int, default=0)
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p.add_argument("--v_AtoN", action="store_true")
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p.add_argument("--aid_type", type=int, default=0)
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p.add_argument("--aid_name", default="@@@@@@@@@@@@@@@@@@@@")
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p.add_argument("--vsize", default="90x14")
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p.add_argument("--channel_a", type=int, default=2087)
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p.add_argument("--channel_b", type=int, default=2088)
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p.add_argument("--ne_lon", type=float, default=9.9)
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p.add_argument("--ne_lat", type=float, default=45.8)
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p.add_argument("--sw_lon", type=float, default=9.5)
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p.add_argument("--sw_lat", type=float, default=45.5)
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p.add_argument("--interval", type=int, default=1)
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p.add_argument("--quiet", type=int, default=15)
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p.add_argument("--part", default="A")
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p.add_argument("--vname", default="NAN")
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p.add_argument("--callsign", default="KC9CAF")
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p.add_argument("--vtype", type=int, default=60)
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p.add_argument("--no-nrzi", action="store_true", help="Output NRZ frame before NRZI (debug)")
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p.add_argument("--bytes", action="store_true", help="Write packed bytes (MSB-first) to stdout (binary)")
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p.add_argument("--print-payload", action="store_true", help="Print 0/1 PDU line before the frame")
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args = p.parse_args()
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if enc is None:
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p.error("AIVDM_Encoder.py не найден; CLI encode_to_nrzi недоступен.")
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payload = build_payload(args)
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if args.print_payload:
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print(payload, file=sys.stderr)
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bits = build_nrzi_frame(payload, enable_nrzi=not args.no_nrzi)
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if args.bytes:
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sys.stdout.buffer.write(nrzi_bits_to_bytes(bits))
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else:
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print("".join(str(b) for b in bits))
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if __name__ == "__main__":
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main()
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