import datetime import logging import queue import threading from enum import Enum from multiprocessing import Queue from multiprocessing.synchronize import Event as MpEvent from typing import Dict from frigate.config import EventsConfig, FrigateConfig from frigate.models import Event from frigate.types import CameraMetricsTypes from frigate.util.builtin import to_relative_box logger = logging.getLogger(__name__) class EventTypeEnum(str, Enum): api = "api" tracked_object = "tracked_object" 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, camera_processes: dict[str, CameraMetricsTypes], event_queue: Queue, event_processed_queue: Queue, timeline_queue: Queue, stop_event: MpEvent, ): threading.Thread.__init__(self) self.name = "event_processor" self.config = config self.camera_processes = camera_processes self.event_queue = event_queue self.event_processed_queue = event_processed_queue self.timeline_queue = timeline_queue self.events_in_process: Dict[str, Event] = {} self.stop_event = stop_event 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(): try: source_type, event_type, camera, event_data = self.event_queue.get( timeout=1 ) except queue.Empty: continue 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 == "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) # set an end_time on events without an end_time before exiting Event.update(end_time=datetime.datetime.now().timestamp()).where( Event.end_time == None ).execute() 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] event_config: EventsConfig = camera_config.record.events width = camera_config.detect.width height = camera_config.detect.height first_detector = list(self.config.detectors.values())[0] start_time = event_data["start_time"] - event_config.pre_capture end_time = ( None if event_data["end_time"] is None else event_data["end_time"] + event_config.post_capture ) # 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 == "end": del self.events_in_process[event_data["id"]] self.event_processed_queue.put((event_data["id"], camera)) def handle_external_detection(self, event_type: str, event_data: Event) -> None: if event_type == "new": 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 == "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']}")