blakeblackshear.frigate/frigate/detectors/detector_config.py

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import logging
from enum import Enum
from typing import Dict, List, Optional, Tuple, Union, Literal
import matplotlib.pyplot as plt
from pydantic import BaseModel, Extra, Field, validator
from pydantic.fields import PrivateAttr
from frigate.util import load_labels
logger = logging.getLogger(__name__)
class PixelFormatEnum(str, Enum):
rgb = "rgb"
bgr = "bgr"
yuv = "yuv"
class InputTensorEnum(str, Enum):
nchw = "nchw"
nhwc = "nhwc"
class ModelConfig(BaseModel):
path: Optional[str] = Field(title="Custom Object detection model path.")
labelmap_path: Optional[str] = Field(title="Label map for custom object detector.")
width: int = Field(default=320, title="Object detection model input width.")
height: int = Field(default=320, title="Object detection model input height.")
labelmap: Dict[int, str] = Field(
default_factory=dict, title="Labelmap customization."
)
input_tensor: InputTensorEnum = Field(
default=InputTensorEnum.nhwc, title="Model Input Tensor Shape"
)
input_pixel_format: PixelFormatEnum = Field(
default=PixelFormatEnum.rgb, title="Model Input Pixel Color Format"
)
_merged_labelmap: Optional[Dict[int, str]] = PrivateAttr()
_colormap: Dict[int, Tuple[int, int, int]] = PrivateAttr()
@property
def merged_labelmap(self) -> Dict[int, str]:
return self._merged_labelmap
@property
def colormap(self) -> Dict[int, Tuple[int, int, int]]:
return self._colormap
def __init__(self, **config):
super().__init__(**config)
self._merged_labelmap = {
**load_labels(config.get("labelmap_path", "/labelmap.txt")),
**config.get("labelmap", {}),
}
cmap = plt.cm.get_cmap("tab10", len(self._merged_labelmap.keys()))
self._colormap = {}
for key, val in self._merged_labelmap.items():
self._colormap[val] = tuple(int(round(255 * c)) for c in cmap(key)[:3])
class Config:
extra = Extra.forbid
class BaseDetectorConfig(BaseModel):
# the type field must be defined in all subclasses
type: str = Field(default="cpu", title="Detector Type")
model: ModelConfig = Field(
default=None, title="Detector specific model configuration."
)
class Config:
extra = Extra.allow
arbitrary_types_allowed = True