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log_playback.py
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log_playback.py
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#!/usr/bin/env python
#
# ChaseMapper - Log File Playback
#
# Copyright (C) 2019 Mark Jessop <vk5qi@rfhead.net>
# Released under GNU GPL v3 or later
#
#
# TODO:
# [x] Playback of basic log entries (car position, balloon telemetry, bearings)
# [ ] Playback and display of balloon prediction data
# [ ] Skip forward / back through file
#
import json
import socket
import sys
import time
import datetime
import traceback
from dateutil.parser import *
def send_bearing(json_data, udp_port=55672, hostname='<broadcast>'):
"""
Grab bearing data out of a json log entry and send it via UDP.
Example bearing line:
{"bearing": 112.0,
"confidence": 47.24745556875042,
"power": 25.694795608520508,
"raw_bearing_angles": [0.0, 1.0, ... 359.0, 360.0],
"raw_doa": [-4.722, -4.719, ... -4.724, -4.722],
"source": "kerberos-sdr",
"bearing_type": "relative",
"log_time": "2019-08-19T11:21:51.714657+00:00",
"type": "BEARING",
"log_type": "BEARING"}
"""
# Also get bearings of form:
# {"type": "BEARING", "bearing_type": "absolute", "source": "EasyBearing", "latitude": -34.9016115,
#"longitude": 138.58986819999998, "bearing": 0, "log_type": "BEARING", "log_time": "2021-12-10T07:33:14.156227+00:00"}
packet = json_data
packet['replay_time'] = json_data['log_time']
if 'kerberos' in json_data['source']:
# Log data from the kerberos has been flipped in bearing already. Need to make sure this isn't done twice.
packet['source'] = 'replay'
# Set up our UDP socket
s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.settimeout(1)
# Set up socket for broadcast, and allow re-use of the address
s.setsockopt(socket.SOL_SOCKET,socket.SO_BROADCAST,1)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
except:
pass
s.bind(('',udp_port))
try:
s.sendto(json.dumps(packet).encode('ascii'), (hostname, udp_port))
except socket.error as e:
s.sendto(json.dumps(packet).encode('ascii'), ('127.0.0.1', udp_port))
if hostname != '<broadcast>':
s.sendto(json.dumps(packet).encode('ascii'), ('127.0.0.1', udp_port))
def send_car_position(json_data, udp_port=55672):
"""
Grab car position data from a json log entry and emit it
{"comment": "CAR",
"log_time": "2019-08-19T11:21:52.303204+00:00",
"lon": 138.68833,
"log_type": "CAR POSITION",
"time": "2019-08-19T11:21:52.300687+00:00",
"lat": -34.71413666666667,
"alt": 69.3,
"speed": 17.118923473141397,
"heading": 27.53170956683383}
"""
packet = {
'type' : 'GPS',
'latitude' : json_data['lat'],
'longitude' : json_data['lon'],
'altitude': json_data['alt'],
'speed': json_data['speed'],
'valid': True,
'replay_time': json_data['log_time']
}
if 'heading' in json_data:
packet['heading'] = json_data['heading']
# Set up our UDP socket
s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.settimeout(1)
# Set up socket for broadcast, and allow re-use of the address
s.setsockopt(socket.SOL_SOCKET,socket.SO_BROADCAST,1)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
except:
pass
s.bind(('',udp_port))
try:
s.sendto(json.dumps(packet).encode('ascii'), ('<broadcast>', udp_port))
except socket.error:
s.sendto(json.dumps(packet).encode('ascii'), ('127.0.0.1', udp_port))
def send_balloon_telemetry(json_data, udp_port=55672):
""" Grab balloon telemetry data from a JSON log entry and emit it
{"sats": -1,
"log_time": "2019-08-21T11:02:25.596045+00:00",
"temp": -1,
"lon": 138.000000,
"callsign": "HORUS",
"time": "2019-08-21T11:02:16+00:00",
"lat": -34.000000,
"alt": 100,
"log_type": "BALLOON TELEMETRY"}
"""
packet = {
'type' : 'PAYLOAD_SUMMARY',
'latitude' : json_data['lat'],
'longitude' : json_data['lon'],
'altitude': json_data['alt'],
'callsign': json_data['callsign'],
'time': parse(json_data['time']).strftime("%H:%M:%S"),
'comment': "Log Playback",
'replay_time': json_data['log_time']
}
# Set up our UDP socket
s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.settimeout(1)
# Set up socket for broadcast, and allow re-use of the address
s.setsockopt(socket.SOL_SOCKET,socket.SO_BROADCAST,1)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
except:
pass
s.bind(('',udp_port))
try:
s.sendto(json.dumps(packet).encode('ascii'), ('<broadcast>', udp_port))
except socket.error:
s.sendto(json.dumps(packet).encode('ascii'), ('127.0.0.1', udp_port))
def playback_json(filename, udp_port=55672, speed=1.0, start_time = 0, hostname='<broadcast>'):
""" Read in a JSON log file and play it back in real-time, or with a speed factor """
with open(filename, 'r') as _log_file:
try:
_first_line = _log_file.readline()
_log_data = json.loads(_first_line)
_previous_time = parse(_log_data['log_time'])
_first_time = _previous_time
except Exception as e:
print("First line of file must be a valid log entry - %s" % str(e))
return
for _line in _log_file:
try:
_log_data = json.loads(_line)
_new_time = parse(_log_data['log_time'])
_time_delta = (_new_time - _previous_time).total_seconds()
_previous_time = _new_time
# Running timer
_run_time = (_new_time - _first_time).total_seconds()
if _run_time < start_time:
continue
_time_min = int(_run_time)//60
_time_sec = _run_time%60.0
if (_time_delta < 100):
time.sleep(_time_delta/speed)
if _log_data['log_type'] == 'CAR POSITION':
send_car_position(_log_data, udp_port)
print("%s - %02d:%.2f - Car Position" % (_log_data['log_time'], _time_min, _time_sec))
elif _log_data['log_type'] == 'BEARING':
send_bearing(_log_data, udp_port, hostname=hostname)
print("%s - %02d:%.2f - Bearing Data" % (_log_data['log_time'], _time_min, _time_sec))
elif _log_data['log_type'] == 'BALLOON TELEMETRY':
send_balloon_telemetry(_log_data, udp_port)
print("%02d:%.2f - Balloon Telemetry (%s)" % (_time_min, _time_sec, _log_data['callsign']))
elif _log_data['log_type'] == 'PREDICTION':
print("%02d:%.2f - Prediction (Not re-played)" % (_time_min, _time_sec))
else:
print("%02d:%.2f - Unknown: %s" % (_time_min, _time_sec, _log_data['log_type']))
except Exception as e:
print("Invalid log entry: %s" % str(e))
if __name__ == '__main__':
filename = ""
speed = 1.0
start_time = 0
hostname = 'localhost'
udp_port = 55672
if len(sys.argv) == 2:
filename = sys.argv[1]
elif len(sys.argv) == 3:
filename = sys.argv[1]
speed = float(sys.argv[2])
elif len(sys.argv) == 4:
filename = sys.argv[1]
speed = float(sys.argv[2])
start_time = float(sys.argv[3])*60
else:
print("USAGE: python log_playback.py filename.log <speed_multiplier> <start_time>")
playback_json(filename, udp_port, speed, start_time, hostname=hostname)