import helpers from event_manager import EventManager from state_manager import StateManager from queue import Queue import structlog import time, uuid from codec2 import FREEDV_MODE TESTMODE = False class FrameHandler(): def __init__(self, name: str, config, states: StateManager, event_manager: EventManager, modem) -> None: self.name = name self.config = config self.states = states self.event_manager = event_manager self.modem = modem self.logger = structlog.get_logger("Frame Handler") self.details = { 'frame' : None, 'snr' : 0, 'frequency_offset': 0, 'freedv_inst': None, 'bytes_per_frame': 0 } def add_to_activity_list(self): frame = self.details['frame'] activity = { "direction": "received", "snr": self.details['snr'], "frequency_offset": self.details['frequency_offset'], "activity_type": frame["frame_type"] } if "origin" in frame: activity["origin"] = frame["origin"] if "destination" in frame: activity["destination"] = frame["destination"] if "gridsquare" in frame: activity["gridsquare"] = frame["gridsquare"] if "session_id" in frame: activity["session_id"] = frame["session_id"] self.states.add_activity(activity) def add_to_heard_stations(self): frame = self.details['frame'] if 'origin' not in frame: return dxgrid = frame['gridsquare'] if 'gridsquare' in frame else "------" helpers.add_to_heard_stations( frame['origin'], dxgrid, self.name, self.details['snr'], self.details['frequency_offset'], self.states.radio_frequency, self.states.heard_stations, ) def make_event(self): event = { "freedata": "modem-message", "received": self.details['frame']['frame_type'], "uuid": str(uuid.uuid4()), "timestamp": int(time.time()), "mycallsign": self.config['STATION']['mycall'], "snr": str(self.details['snr']), } if 'origin' in self.details['frame']: event['dxcallsign'] = self.details['frame']['origin'] return event def emit_event(self): event_data = self.make_event() self.event_manager.broadcast(event_data) def get_tx_mode(self): return FREEDV_MODE.signalling.value def transmit(self, frame): if not TESTMODE: self.modem.transmit(self.get_tx_mode(), 1, 0, frame) else: self.event_manager.broadcast(frame) def follow_protocol(self): pass def log(self): return self.logger.info(f"[Frame Handler] Handling frame {self.details['frame']['frame_type']}") def handle(self, frame, snr, frequency_offset, freedv_inst, bytes_per_frame): self.details['frame'] = frame self.details['snr'] = snr self.details['frequency_offset'] = frequency_offset self.details['freedv_inst'] = freedv_inst self.details['bytes_per_frame'] = bytes_per_frame self.log() self.add_to_heard_stations() self.add_to_activity_list() self.emit_event() self.follow_protocol()