73 lines
3.2 KiB
Python
73 lines
3.2 KiB
Python
from dataclasses import dataclass
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from edge.tracking import Track
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from edge.events import Event, EventType, severity_for
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from edge.detectors.fall import FallDetector
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from edge.detectors.immobility import ImmobilityWatchdog
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from edge.detectors.ghost import GhostIncidentDetector
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from edge.detectors.zone import ZoneIntrusionDetector
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@dataclass
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class EngineConfig:
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camera_id: str = "cam"
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cooldown_s: float = 30.0
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class EventEngine:
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def __init__(self, fall: FallDetector, immobility: ImmobilityWatchdog,
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ghost: GhostIncidentDetector, zone: ZoneIntrusionDetector,
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cfg: EngineConfig):
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self.fall = fall
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self.immobility = immobility
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self.ghost = ghost
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self.zone = zone
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self.cfg = cfg
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self._last_emit: dict[tuple, float] = {}
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def _allow(self, key: tuple, now: float) -> bool:
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last = self._last_emit.get(key)
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if last is not None and now - last < self.cfg.cooldown_s:
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return False
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self._last_emit[key] = now
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return True
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def _mk(self, etype: EventType, now: float, track_id=None, zone_id=None,
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metrics=None, spatial=None) -> Event:
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return Event(etype, severity_for(etype), self.cfg.camera_id, track_id,
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zone_id, now, 0.0, metrics or {}, spatial)
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def process(self, active_tracks: list[Track], lost_tracks: list[Track],
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now: float) -> list[Event]:
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events: list[Event] = []
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self.ghost.on_lost(lost_tracks, now)
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for tr in active_tracks:
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zone_hits = self.zone.update(tr, now)
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in_zone = bool(self.zone.active_zone_ids(tr.track_id))
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sig, meta = self.fall.update(tr, now)
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state = self.fall._states.get(tr.track_id)
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self.ghost.note_state(tr.track_id, state.name if state else "STANDING")
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if sig == "fall" and self._allow((EventType.FALL, tr.track_id), now):
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events.append(self._mk(EventType.FALL, now, tr.track_id, metrics=meta))
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elif sig == "no_motion" and self._allow((EventType.NO_MOTION, tr.track_id), now):
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events.append(self._mk(EventType.NO_MOTION, now, tr.track_id, metrics=meta))
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fired, imeta = self.immobility.update(tr, now, in_danger_zone=in_zone)
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if fired and self._allow((EventType.IMMOBILITY, tr.track_id), now):
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events.append(self._mk(EventType.IMMOBILITY, now, tr.track_id, metrics=imeta))
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for hit in zone_hits:
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etype = (EventType.ZONE_RESTRICTED if hit["level"] == "restricted"
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else EventType.ZONE_WARNING)
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if self._allow((etype, tr.track_id, hit["zone_id"]), now):
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events.append(self._mk(etype, now, tr.track_id, zone_id=hit["zone_id"]))
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for g in self.ghost.update(active_tracks, now):
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key = (EventType.GHOST, round(g["spatial"][0]), round(g["spatial"][1]))
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if self._allow(key, now):
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events.append(self._mk(EventType.GHOST, now, spatial=g["spatial"],
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metrics={"last_state": g["last_state"],
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"waited_s": g["waited_s"]}))
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return events
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