import logging import threading from multiprocessing import Queue from multiprocessing.synchronize import Event as MpEvent from typing import Dict from frigate.comms.events_updater import EventEndPublisher, EventUpdateSubscriber from frigate.config import FrigateConfig from frigate.events.types import EventStateEnum, EventTypeEnum from frigate.models import Event from frigate.util.builtin import to_relative_box logger = logging.getLogger(__name__) def should_update_db(prev_event: Event, current_event: Event) -> bool: """If current_event has updated fields and (clip or snapshot).""" if current_event["has_clip"] or current_event["has_snapshot"]: # if this is the first time has_clip or has_snapshot turned true if not prev_event["has_clip"] and not prev_event["has_snapshot"]: return True # or if any of the following values changed if ( prev_event["top_score"] != current_event["top_score"] or prev_event["entered_zones"] != current_event["entered_zones"] or prev_event["thumbnail"] != current_event["thumbnail"] or prev_event["end_time"] != current_event["end_time"] ): return True return False def should_update_state(prev_event: Event, current_event: Event) -> bool: """If current event should update state, but not necessarily update the db.""" if prev_event["stationary"] != current_event["stationary"]: return True if prev_event["attributes"] != current_event["attributes"]: return True if prev_event["sub_label"] != current_event["sub_label"]: return True if len(prev_event["current_zones"]) < len(current_event["current_zones"]): return True return False class EventProcessor(threading.Thread): def __init__( self, config: FrigateConfig, timeline_queue: Queue, stop_event: MpEvent, ): threading.Thread.__init__(self) self.name = "event_processor" self.config = config self.timeline_queue = timeline_queue self.events_in_process: Dict[str, Event] = {} self.stop_event = stop_event self.event_receiver = EventUpdateSubscriber() self.event_end_publisher = EventEndPublisher() def run(self) -> None: # set an end_time on events without an end_time on startup Event.update(end_time=Event.start_time + 30).where( Event.end_time == None ).execute() while not self.stop_event.is_set(): update = self.event_receiver.check_for_update() if update == None: continue source_type, event_type, camera, event_data = update logger.debug( f"Event received: {source_type} {event_type} {camera} {event_data['id']}" ) if source_type == EventTypeEnum.tracked_object: self.timeline_queue.put( ( camera, source_type, event_type, self.events_in_process.get(event_data["id"]), event_data, ) ) if event_type == EventStateEnum.start: self.events_in_process[event_data["id"]] = event_data continue self.handle_object_detection(event_type, camera, event_data) elif source_type == EventTypeEnum.api: self.timeline_queue.put( ( camera, source_type, event_type, {}, event_data, ) ) self.handle_external_detection(event_type, event_data) self.event_receiver.stop() self.event_end_publisher.stop() logger.info("Exiting event processor...") def handle_object_detection( self, event_type: str, camera: str, event_data: Event, ) -> None: """handle tracked object event updates.""" updated_db = False # if this is the first message, just store it and continue, its not time to insert it in the db if should_update_db(self.events_in_process[event_data["id"]], event_data): updated_db = True camera_config = self.config.cameras[camera] width = camera_config.detect.width height = camera_config.detect.height first_detector = list(self.config.detectors.values())[0] start_time = event_data["start_time"] end_time = ( None if event_data["end_time"] is None else event_data["end_time"] ) # score of the snapshot score = ( None if event_data["snapshot"] is None else event_data["snapshot"]["score"] ) # detection region in the snapshot region = ( None if event_data["snapshot"] is None else to_relative_box( width, height, event_data["snapshot"]["region"], ) ) # bounding box for the snapshot box = ( None if event_data["snapshot"] is None else to_relative_box( width, height, event_data["snapshot"]["box"], ) ) attributes = ( None if event_data["snapshot"] is None else [ { "box": to_relative_box( width, height, a["box"], ), "label": a["label"], "score": a["score"], } for a in event_data["snapshot"]["attributes"] ] ) # keep these from being set back to false because the event # may have started while recordings and snapshots were enabled # this would be an issue for long running events if self.events_in_process[event_data["id"]]["has_clip"]: event_data["has_clip"] = True if self.events_in_process[event_data["id"]]["has_snapshot"]: event_data["has_snapshot"] = True event = { Event.id: event_data["id"], Event.label: event_data["label"], Event.camera: camera, Event.start_time: start_time, Event.end_time: end_time, Event.zones: list(event_data["entered_zones"]), Event.thumbnail: event_data["thumbnail"], Event.has_clip: event_data["has_clip"], Event.has_snapshot: event_data["has_snapshot"], Event.model_hash: first_detector.model.model_hash, Event.model_type: first_detector.model.model_type, Event.detector_type: first_detector.type, Event.data: { "box": box, "region": region, "score": score, "top_score": event_data["top_score"], "attributes": attributes, "type": "object", }, } # only overwrite the sub_label in the database if it's set if event_data.get("sub_label") is not None: event[Event.sub_label] = event_data["sub_label"][0] event[Event.data]["sub_label_score"] = event_data["sub_label"][1] ( Event.insert(event) .on_conflict( conflict_target=[Event.id], update=event, ) .execute() ) # check if the stored event_data should be updated if updated_db or should_update_state( self.events_in_process[event_data["id"]], event_data ): # update the stored copy for comparison on future update messages self.events_in_process[event_data["id"]] = event_data if event_type == EventStateEnum.end: del self.events_in_process[event_data["id"]] self.event_end_publisher.publish((event_data["id"], camera, updated_db)) def handle_external_detection( self, event_type: EventStateEnum, event_data: Event ) -> None: if event_type == EventStateEnum.start: event = { Event.id: event_data["id"], Event.label: event_data["label"], Event.sub_label: event_data["sub_label"], Event.camera: event_data["camera"], Event.start_time: event_data["start_time"], Event.end_time: event_data["end_time"], Event.thumbnail: event_data["thumbnail"], Event.has_clip: event_data["has_clip"], Event.has_snapshot: event_data["has_snapshot"], Event.zones: [], Event.data: { "type": event_data["type"], "score": event_data["score"], "top_score": event_data["score"], }, } Event.insert(event).execute() elif event_type == EventStateEnum.end: event = { Event.id: event_data["id"], Event.end_time: event_data["end_time"], } try: Event.update(event).where(Event.id == event_data["id"]).execute() except Exception: logger.warning(f"Failed to update manual event: {event_data['id']}")