mirror of
https://github.com/blakeblackshear/frigate.git
synced 2024-11-21 19:07:46 +01:00
a2ca18a714
* Simplify loitering logic * Fix divide by zero * Add device config for semantic search * Add docs
95 lines
2.8 KiB
Python
95 lines
2.8 KiB
Python
"""SQLite-vec embeddings database."""
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import json
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import logging
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import multiprocessing as mp
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import os
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import signal
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import threading
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from types import FrameType
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from typing import Optional
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from setproctitle import setproctitle
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from frigate.config import FrigateConfig
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from frigate.const import CONFIG_DIR
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from frigate.db.sqlitevecq import SqliteVecQueueDatabase
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from frigate.models import Event
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from frigate.util.services import listen
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from .embeddings import Embeddings
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from .maintainer import EmbeddingMaintainer
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from .util import ZScoreNormalization
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logger = logging.getLogger(__name__)
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def manage_embeddings(config: FrigateConfig) -> None:
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# Only initialize embeddings if semantic search is enabled
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if not config.semantic_search.enabled:
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return
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stop_event = mp.Event()
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def receiveSignal(signalNumber: int, frame: Optional[FrameType]) -> None:
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stop_event.set()
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signal.signal(signal.SIGTERM, receiveSignal)
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signal.signal(signal.SIGINT, receiveSignal)
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threading.current_thread().name = "process:embeddings_manager"
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setproctitle("frigate.embeddings_manager")
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listen()
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# Configure Frigate DB
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db = SqliteVecQueueDatabase(
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config.database.path,
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pragmas={
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"auto_vacuum": "FULL", # Does not defragment database
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"cache_size": -512 * 1000, # 512MB of cache
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"synchronous": "NORMAL", # Safe when using WAL https://www.sqlite.org/pragma.html#pragma_synchronous
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},
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timeout=max(60, 10 * len([c for c in config.cameras.values() if c.enabled])),
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load_vec_extension=True,
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)
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models = [Event]
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db.bind(models)
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embeddings = Embeddings(config.semantic_search, db)
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# Check if we need to re-index events
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if config.semantic_search.reindex:
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embeddings.reindex()
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maintainer = EmbeddingMaintainer(
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db,
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config,
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stop_event,
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)
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maintainer.start()
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class EmbeddingsContext:
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def __init__(self, config: FrigateConfig, db: SqliteVecQueueDatabase):
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self.embeddings = Embeddings(config.semantic_search, db)
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self.thumb_stats = ZScoreNormalization()
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self.desc_stats = ZScoreNormalization()
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# load stats from disk
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try:
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with open(os.path.join(CONFIG_DIR, ".search_stats.json"), "r") as f:
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data = json.loads(f.read())
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self.thumb_stats.from_dict(data["thumb_stats"])
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self.desc_stats.from_dict(data["desc_stats"])
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except FileNotFoundError:
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pass
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def save_stats(self):
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"""Write the stats to disk as JSON on exit."""
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contents = {
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"thumb_stats": self.thumb_stats.to_dict(),
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"desc_stats": self.desc_stats.to_dict(),
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}
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with open(os.path.join(CONFIG_DIR, ".search_stats.json"), "w") as f:
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json.dump(contents, f)
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