mirror of
https://github.com/blakeblackshear/frigate.git
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38ff46e45c
* Ignore entire __pycache__ folder instead of individual *.pyc files * Rewrite the yaml loader to match PyYAML The old implementation would fail in weird ways with configs that were incorrect in just the right way. The new implementation just does what PyYAML would do, only diverging in case of duplicate keys. * Clarify duplicate yaml key ValueError message Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com> --------- Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>
394 lines
12 KiB
Python
394 lines
12 KiB
Python
"""Utilities for builtin types manipulation."""
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import ast
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import copy
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import datetime
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import logging
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import multiprocessing as mp
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import queue
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import re
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import shlex
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import urllib.parse
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from collections import Counter
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from collections.abc import Mapping
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from pathlib import Path
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from typing import Any, Optional, Tuple
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import numpy as np
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import pytz
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import yaml
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from ruamel.yaml import YAML
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from tzlocal import get_localzone
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from zoneinfo import ZoneInfoNotFoundError
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from frigate.const import REGEX_HTTP_CAMERA_USER_PASS, REGEX_RTSP_CAMERA_USER_PASS
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logger = logging.getLogger(__name__)
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class EventsPerSecond:
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def __init__(self, max_events=1000, last_n_seconds=10):
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self._start = None
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self._max_events = max_events
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self._last_n_seconds = last_n_seconds
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self._timestamps = []
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def start(self):
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self._start = datetime.datetime.now().timestamp()
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def update(self):
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now = datetime.datetime.now().timestamp()
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if self._start is None:
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self._start = now
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self._timestamps.append(now)
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# truncate the list when it goes 100 over the max_size
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if len(self._timestamps) > self._max_events + 100:
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self._timestamps = self._timestamps[(1 - self._max_events) :]
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self.expire_timestamps(now)
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def eps(self):
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now = datetime.datetime.now().timestamp()
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if self._start is None:
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self._start = now
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# compute the (approximate) events in the last n seconds
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self.expire_timestamps(now)
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seconds = min(now - self._start, self._last_n_seconds)
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# avoid divide by zero
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if seconds == 0:
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seconds = 1
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return len(self._timestamps) / seconds
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# remove aged out timestamps
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def expire_timestamps(self, now):
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threshold = now - self._last_n_seconds
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while self._timestamps and self._timestamps[0] < threshold:
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del self._timestamps[0]
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def deep_merge(dct1: dict, dct2: dict, override=False, merge_lists=False) -> dict:
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"""
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:param dct1: First dict to merge
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:param dct2: Second dict to merge
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:param override: if same key exists in both dictionaries, should override? otherwise ignore. (default=True)
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:return: The merge dictionary
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"""
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merged = copy.deepcopy(dct1)
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for k, v2 in dct2.items():
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if k in merged:
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v1 = merged[k]
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if isinstance(v1, dict) and isinstance(v2, Mapping):
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merged[k] = deep_merge(v1, v2, override)
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elif isinstance(v1, list) and isinstance(v2, list):
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if merge_lists:
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merged[k] = v1 + v2
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else:
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if override:
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merged[k] = copy.deepcopy(v2)
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else:
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merged[k] = copy.deepcopy(v2)
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return merged
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class NoDuplicateKeysLoader(yaml.loader.SafeLoader):
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"""A yaml SafeLoader that disallows duplicate keys"""
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def construct_mapping(self, node, deep=False):
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mapping = super().construct_mapping(node, deep=deep)
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if len(node.value) != len(mapping):
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# There's a duplicate key somewhere. Find it.
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duplicate_keys = [
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key
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for key, count in Counter(
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self.construct_object(key, deep=deep) for key, _ in node.value
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)
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if count > 1
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]
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# This might be possible if PyYAML's construct_mapping() changes the node
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# afterwards for some reason? I don't see why, but better safe than sorry.
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assert len(duplicate_keys) > 0
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raise ValueError(
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f"Config field duplicates are not allowed, the following fields are duplicated in the config: {', '.join(duplicate_keys)}"
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)
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return mapping
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def clean_camera_user_pass(line: str) -> str:
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"""Removes user and password from line."""
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rtsp_cleaned = re.sub(REGEX_RTSP_CAMERA_USER_PASS, "://*:*@", line)
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return re.sub(REGEX_HTTP_CAMERA_USER_PASS, "user=*&password=*", rtsp_cleaned)
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def escape_special_characters(path: str) -> str:
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"""Cleans reserved characters to encodings for ffmpeg."""
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if len(path) > 1000:
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return ValueError("Input too long to check")
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try:
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found = re.search(REGEX_RTSP_CAMERA_USER_PASS, path).group(0)[3:-1]
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pw = found[(found.index(":") + 1) :]
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return path.replace(pw, urllib.parse.quote_plus(pw))
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except AttributeError:
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# path does not have user:pass
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return path
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def get_ffmpeg_arg_list(arg: Any) -> list:
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"""Use arg if list or convert to list format."""
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return arg if isinstance(arg, list) else shlex.split(arg)
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def load_labels(path: Optional[str], encoding="utf-8", prefill=91):
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"""Loads labels from file (with or without index numbers).
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Args:
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path: path to label file.
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encoding: label file encoding.
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Returns:
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Dictionary mapping indices to labels.
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"""
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if path is None:
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return {}
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with open(path, "r", encoding=encoding) as f:
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labels = {index: "unknown" for index in range(prefill)}
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lines = f.readlines()
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if not lines:
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return {}
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if lines[0].split(" ", maxsplit=1)[0].isdigit():
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pairs = [line.split(" ", maxsplit=1) for line in lines]
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labels.update({int(index): label.strip() for index, label in pairs})
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else:
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labels.update({index: line.strip() for index, line in enumerate(lines)})
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return labels
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def get_tz_modifiers(tz_name: str) -> Tuple[str, str, int]:
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seconds_offset = (
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datetime.datetime.now(pytz.timezone(tz_name)).utcoffset().total_seconds()
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)
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hours_offset = int(seconds_offset / 60 / 60)
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minutes_offset = int(seconds_offset / 60 - hours_offset * 60)
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hour_modifier = f"{hours_offset} hour"
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minute_modifier = f"{minutes_offset} minute"
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return hour_modifier, minute_modifier, seconds_offset
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def to_relative_box(
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width: int, height: int, box: Tuple[int, int, int, int]
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) -> Tuple[int, int, int, int]:
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return (
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box[0] / width, # x
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box[1] / height, # y
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(box[2] - box[0]) / width, # w
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(box[3] - box[1]) / height, # h
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)
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def create_mask(frame_shape, mask):
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mask_img = np.zeros(frame_shape, np.uint8)
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mask_img[:] = 255
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def update_yaml_from_url(file_path, url):
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parsed_url = urllib.parse.urlparse(url)
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query_string = urllib.parse.parse_qs(parsed_url.query, keep_blank_values=True)
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for key_path_str, new_value_list in query_string.items():
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key_path = key_path_str.split(".")
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for i in range(len(key_path)):
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try:
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index = int(key_path[i])
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key_path[i] = (key_path[i - 1], index)
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key_path.pop(i - 1)
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except ValueError:
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pass
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if len(new_value_list) > 1:
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update_yaml_file(file_path, key_path, new_value_list)
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else:
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value = new_value_list[0]
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if "," in value:
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# Skip conversion if we're a mask or zone string
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update_yaml_file(file_path, key_path, value)
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else:
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try:
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value = ast.literal_eval(value)
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except (ValueError, SyntaxError):
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pass
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update_yaml_file(file_path, key_path, value)
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update_yaml_file(file_path, key_path, value)
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def update_yaml_file(file_path, key_path, new_value):
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yaml = YAML()
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yaml.indent(mapping=2, sequence=4, offset=2)
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with open(file_path, "r") as f:
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data = yaml.load(f)
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data = update_yaml(data, key_path, new_value)
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with open(file_path, "w") as f:
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yaml.dump(data, f)
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def update_yaml(data, key_path, new_value):
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temp = data
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for key in key_path[:-1]:
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if isinstance(key, tuple):
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if key[0] not in temp:
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temp[key[0]] = [{}] * max(1, key[1] + 1)
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elif len(temp[key[0]]) <= key[1]:
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temp[key[0]] += [{}] * (key[1] - len(temp[key[0]]) + 1)
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temp = temp[key[0]][key[1]]
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else:
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if key not in temp or temp[key] is None:
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temp[key] = {}
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temp = temp[key]
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last_key = key_path[-1]
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if new_value == "":
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if isinstance(last_key, tuple):
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del temp[last_key[0]][last_key[1]]
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else:
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del temp[last_key]
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else:
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if isinstance(last_key, tuple):
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if last_key[0] not in temp:
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temp[last_key[0]] = [{}] * max(1, last_key[1] + 1)
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elif len(temp[last_key[0]]) <= last_key[1]:
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temp[last_key[0]] += [{}] * (last_key[1] - len(temp[last_key[0]]) + 1)
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temp[last_key[0]][last_key[1]] = new_value
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else:
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if (
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last_key in temp
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and isinstance(temp[last_key], dict)
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and isinstance(new_value, dict)
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):
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temp[last_key].update(new_value)
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else:
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temp[last_key] = new_value
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return data
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def find_by_key(dictionary, target_key):
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if target_key in dictionary:
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return dictionary[target_key]
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else:
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for value in dictionary.values():
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if isinstance(value, dict):
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result = find_by_key(value, target_key)
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if result is not None:
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return result
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return None
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def save_default_config(location: str) -> None:
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try:
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with open(location, "w") as f:
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f.write(
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"""
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mqtt:
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enabled: False
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cameras:
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name_of_your_camera: # <------ Name the camera
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enabled: True
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ffmpeg:
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inputs:
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- path: rtsp://10.0.10.10:554/rtsp # <----- The stream you want to use for detection
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roles:
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- detect
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detect:
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enabled: False # <---- disable detection until you have a working camera feed
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width: 1280
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height: 720
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"""
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)
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except PermissionError:
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logger.error("Unable to write default config to /config")
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return
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logger.info(
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"Created default config file, see the getting started docs for configuration https://docs.frigate.video/guides/getting_started"
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)
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def get_tomorrow_at_time(hour: int) -> datetime.datetime:
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"""Returns the datetime of the following day at 2am."""
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try:
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tomorrow = datetime.datetime.now(get_localzone()) + datetime.timedelta(days=1)
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except ZoneInfoNotFoundError:
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tomorrow = datetime.datetime.now(datetime.timezone.utc) + datetime.timedelta(
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days=1
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)
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logger.warning(
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"Using utc for maintenance due to missing or incorrect timezone set"
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)
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return tomorrow.replace(hour=hour, minute=0, second=0).astimezone(
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datetime.timezone.utc
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)
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def clear_and_unlink(file: Path, missing_ok: bool = True) -> None:
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"""clear file then unlink to avoid space retained by file descriptors."""
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if not missing_ok and not file.exists():
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raise FileNotFoundError()
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# empty contents of file before unlinking https://github.com/blakeblackshear/frigate/issues/4769
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with open(file, "w"):
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pass
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file.unlink(missing_ok=missing_ok)
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def empty_and_close_queue(q: mp.Queue):
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while True:
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try:
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q.get(block=True, timeout=0.5)
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except queue.Empty:
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q.close()
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q.join_thread()
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return
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def generate_color_palette(n):
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# mimic matplotlib's color scheme
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base_colors = [
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(31, 119, 180), # blue
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(255, 127, 14), # orange
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(44, 160, 44), # green
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(214, 39, 40), # red
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(148, 103, 189), # purple
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(140, 86, 75), # brown
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(227, 119, 194), # pink
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(127, 127, 127), # gray
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(188, 189, 34), # olive
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(23, 190, 207), # cyan
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]
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def interpolate(color1, color2, factor):
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return tuple(int(c1 + (c2 - c1) * factor) for c1, c2 in zip(color1, color2))
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if n <= len(base_colors):
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return base_colors[:n]
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colors = base_colors.copy()
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step = 1 / (n - len(base_colors) + 1)
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extra_colors_needed = n - len(base_colors)
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# interpolate between the base colors to generate more if needed
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for i in range(extra_colors_needed):
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index = i % (len(base_colors) - 1)
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factor = (i + 1) * step
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color1 = base_colors[index]
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color2 = base_colors[index + 1]
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colors.append(interpolate(color1, color2, factor))
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return colors
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