base ¶

def apply(self, clip: vs.VideoNode) -> vs.VideoNode:
    """
    Applies the property to the VideoNode.
    """
    return clip.std.SetFrameProp(self.prop_key, self.value)

@classmethod
def ensure_presence(cls, clip: vs.VideoNode, value: Any, func: FuncExcept | None = None) -> vs.VideoNode:
    """
    Ensure the presence of the property in the VideoNode.
    """
    enum_value = cls.from_param_or_video(value, clip, True, func)

    return clip.std.SetFrameProp(enum_value.prop_key, enum_value.value)

@staticmethod
def ensure_presences(
    clip: vs.VideoNode, prop_enums: Iterable[type[PropEnum] | PropEnum], func: FuncExcept | None = None
) -> vs.VideoNode:
    """
    Ensure the presence of multiple PropEnums at once.
    """
    return clip.std.SetFrameProps(
        **{
            value.prop_key: value.value
            for value in (
                prop_enum if isinstance(prop_enum, PropEnum) else prop_enum.from_video(clip, True, func)
                for prop_enum in prop_enums
            )
        },
    )

@classmethod
def from_param_or_video(
    cls,
    value: Any,
    src: vs.VideoNode | vs.VideoFrame | Mapping[str, Any],
    strict: bool = False,
    func_except: FuncExcept | None = None,
) -> Self:
    """
    Get the enum member from a value that can be casted to this prop value or grab it from frame properties.

    If `strict=False`, gather the heuristics using the clip's size or format.

    Args:
        value: Value to cast.
        src: Clip to get prop from.
        strict: Be strict about the frame properties. Default: False.
        func_except: Function returned for custom error handling.
    """
    prop = cls.from_param_with_fallback(value, None)

    # Delay the `from_video` call here to avoid unnecessary frame rendering
    if prop is None:
        return cls.from_video(src, strict, func_except)

    return prop

@classmethod
def from_param_with_fallback[T](cls, value: Any, fallback: T | None = None) -> Self | T | None:
    """
    Attempts to obtain an enum member from a parameter value, returning a fallback if the value cannot be converted
    or represents an unspecified enum member.

    Args:
        value: The input value to convert into an enum member.
        fallback: The value to return if the input cannot be converted. Defaults to `None`.

    Returns:
        The corresponding enum member if conversion succeeds, otherwise the provided `fallback` value.
    """
    with suppress(NotFoundEnumValueError, CustomValueError):
        # Will raise a NotFoundEnumValueError if the value can't be casted
        casted = cls.from_param(value)

        # If unspecified, fallbacks to `fallback` value
        if casted.is_unspecified():
            raise CustomValueError

        return casted

    return fallback

@classmethod
@abstractmethod
def from_res(cls, frame: vs.VideoNode | vs.VideoFrame) -> Self:
    """
    Get an enum member from the video resolution with heuristics.
    """

@classmethod
@abstractmethod
def from_video(
    cls, src: vs.VideoNode | vs.VideoFrame | Mapping[str, Any], strict: bool = False, func: FuncExcept | None = None
) -> Self:
    """
    Get an enum member from the frame properties or optionally fall back to resolution when strict=False.
    """

def is_unspecified(self) -> bool:
    """
    Whether the value is unspecified.
    """
    return False

@cachedproperty
def pretty_string(self) -> str:
    """
    Get a pretty, displayable string of the enum member.
    """
    return self._pretty_string

@classproperty
@classmethod
def prop_key(cls) -> str:
    """
    The key used in props to store the enum.
    """
    return f"_{cls.__name__}"

@cachedproperty
def string(self) -> str:
    """
    Get the string representation used in resize plugin/encoders.
    """
    return self._string