Add aliases to typing for clearer params

vskernels/kernels/abstract.py

@@ -13,6 +13,7 @@
 )
 
 from ..exceptions import UnknownDescalerError, UnknownKernelError, UnknownResamplerError, UnknownScalerError
+from ..types import LeftShift, TopShift
 
 __all__ = [
     'Scaler', 'ScalerT',
@@ -173,14 +174,14 @@ class Scaler(BaseScaler):
     @inject_self.cached
     @inject_kwargs_params
     def scale(  # type: ignore[override]
-        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0), **kwargs: Any
+        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0), **kwargs: Any
     ) -> vs.VideoNode:
         check_correct_subsampling(clip, width, height)
         return self.scale_function(clip, **self.get_scale_args(clip, shift, width, height, **kwargs))
 
     @inject_self.cached
     def multi(
-        self, clip: vs.VideoNode, multi: float = 2, shift: tuple[float, float] = (0, 0), **kwargs: Any
+        self, clip: vs.VideoNode, multi: float = 2, shift: tuple[TopShift, LeftShift] = (0, 0), **kwargs: Any
     ) -> vs.VideoNode:
         assert check_variable_resolution(clip, self.multi)
 
@@ -194,7 +195,7 @@ def multi(
         return self.scale(clip, dst_width, dst_height, shift, **kwargs)
 
     def get_scale_args(
-        self, clip: vs.VideoNode, shift: tuple[float, float] = (0, 0),
+        self, clip: vs.VideoNode, shift: tuple[TopShift, LeftShift] = (0, 0),
         width: int | None = None, height: int | None = None,
         *funcs: Callable[..., Any], **kwargs: Any
     ) -> KwargsT:
@@ -225,7 +226,7 @@ class Descaler(BaseScaler):
     @inject_self.cached
     @inject_kwargs_params
     def descale(  # type: ignore[override]
-        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0), **kwargs: Any
+        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0), **kwargs: Any
     ) -> vs.VideoNode:
         check_correct_subsampling(clip, width, height)
 
@@ -255,7 +256,7 @@ def descale(  # type: ignore[override]
         return depth(descaled, bits)
 
     def get_descale_args(
-        self, clip: vs.VideoNode, shift: tuple[float, float] = (0, 0),
+        self, clip: vs.VideoNode, shift: tuple[TopShift, LeftShift] = (0, 0),
         width: int | None = None, height: int | None = None,
         *funcs: Callable[..., Any], **kwargs: Any
     ) -> KwargsT:
@@ -320,7 +321,7 @@ class Kernel(Scaler, Descaler, Resampler):  # type: ignore
     @overload  # type: ignore
     @inject_self.cached
     @inject_kwargs_params
-    def shift(self, clip: vs.VideoNode, shift: tuple[float, float] = (0, 0), **kwargs: Any) -> vs.VideoNode:
+    def shift(self, clip: vs.VideoNode, shift: tuple[TopShift, LeftShift] = (0, 0), **kwargs: Any) -> vs.VideoNode:
         ...
 
     @overload  # type: ignore
@@ -343,7 +344,7 @@ def shift(
 
         n_planes = clip.format.num_planes
 
-        def _shift(src: vs.VideoNode, shift: tuple[float, float] = (0, 0)) -> vs.VideoNode:
+        def _shift(src: vs.VideoNode, shift: tuple[TopShift, LeftShift] = (0, 0)) -> vs.VideoNode:
             return self.scale_function(src, **self.get_scale_args(src, shift, **kwargs))
 
         if not shifts_or_top and not shift_left:
@@ -469,7 +470,7 @@ def get_params_args(
         return dict(width=width, height=height) | kwargs
 
     def get_scale_args(
-        self, clip: vs.VideoNode, shift: tuple[float, float] = (0, 0),
+        self, clip: vs.VideoNode, shift: tuple[TopShift, LeftShift] = (0, 0),
         width: int | None = None, height: int | None = None,
         *funcs: Callable[..., Any], **kwargs: Any
     ) -> KwargsT:
@@ -480,7 +481,7 @@ def get_scale_args(
         )
 
     def get_descale_args(
-        self, clip: vs.VideoNode, shift: tuple[float, float] = (0, 0),
+        self, clip: vs.VideoNode, shift: tuple[TopShift, LeftShift] = (0, 0),
         width: int | None = None, height: int | None = None,
         *funcs: Callable[..., Any], **kwargs: Any
     ) -> KwargsT:

vskernels/kernels/complex.py

@@ -5,6 +5,7 @@
 from stgpytools import inject_kwargs_params
 from vstools import Dar, KwargsT, Resolution, Sar, VSFunctionAllArgs, check_correct_subsampling, inject_self, vs
 
+from ..types import Center, LeftShift, Slope, TopShift
 from .abstract import Descaler, Kernel, Resampler, Scaler
 
 __all__ = [
@@ -41,8 +42,8 @@ def _linear_op(op_name: str) -> Any:
         @inject_kwargs_params
         def func(
             self: _BaseLinearOperation, clip: vs.VideoNode, width: int, height: int,
-            shift: tuple[float, float] = (0, 0), *,
-            linear: bool = False, sigmoid: bool | tuple[float, float] = False, **kwargs: Any
+            shift: tuple[TopShift, LeftShift] = (0, 0), *,
+            linear: bool = False, sigmoid: bool | tuple[Slope, Center] = False, **kwargs: Any
         ) -> vs.VideoNode:
             from ..util import LinearLight
 
@@ -73,8 +74,8 @@ class LinearScaler(_BaseLinearOperation, Scaler):
         @inject_self.cached
         @inject_kwargs_params
         def scale(  # type: ignore[override]
-            self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0),
-            *, linear: bool = False, sigmoid: bool | tuple[float, float] = False, **kwargs: Any
+            self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0),
+            *, linear: bool = False, sigmoid: bool | tuple[Slope, Center] = False, **kwargs: Any
         ) -> vs.VideoNode:
             ...
     else:
@@ -86,8 +87,8 @@ class LinearDescaler(_BaseLinearOperation, Descaler):
         @inject_self.cached
         @inject_kwargs_params
         def descale(  # type: ignore[override]
-            self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0),
-            *, linear: bool = False, sigmoid: bool | tuple[float, float] = False, **kwargs: Any
+            self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0),
+            *, linear: bool = False, sigmoid: bool | tuple[Slope, Center] = False, **kwargs: Any
         ) -> vs.VideoNode:
             ...
     else:
@@ -116,9 +117,9 @@ def _get_kwargs_keep_ar(
         return kwargs
 
     def _handle_crop_resize_kwargs(  # type: ignore[override]
-        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float],
+        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift],
         sar: Sar | bool | float | None, dar: Dar | bool | float | None, **kwargs: Any
-    ) -> tuple[KwargsT, tuple[float, float], Sar | None]:
+    ) -> tuple[KwargsT, tuple[TopShift, LeftShift], Sar | None]:
         kwargs.setdefault('src_top', kwargs.pop('sy', shift[0]))
         kwargs.setdefault('src_left', kwargs.pop('sx', shift[1]))
         kwargs.setdefault('src_width', kwargs.pop('sw', clip.width))
@@ -162,7 +163,7 @@ def _handle_crop_resize_kwargs(  # type: ignore[override]
     @inject_self.cached
     @inject_kwargs_params
     def scale(  # type: ignore[override]
-        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0), *,
+        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0), *,
         sar: Sar | float | bool | None = None, dar: Dar | float | bool | None = None, keep_ar: bool = False,
         **kwargs: Any
     ) -> vs.VideoNode:
@@ -189,10 +190,10 @@ class ComplexScaler(LinearScaler, KeepArScaler):
     @inject_self.cached
     @inject_kwargs_params
     def scale(  # type: ignore[override]
-        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0),
+        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0),
         *,
         sar: Sar | bool | float | None = None, dar: Dar | bool | float | None = None, keep_ar: bool = False,
-        linear: bool = False, sigmoid: bool | tuple[float, float] = False,
+        linear: bool = False, sigmoid: bool | tuple[Slope, Center] = False,
         **kwargs: Any
     ) -> vs.VideoNode:
         return super().scale(

vskernels/kernels/fmtconv.py

@@ -6,6 +6,7 @@
 from stgpytools import inject_kwargs_params
 from vstools import VideoFormatT, VSFunction, core, inject_self, vs
 
+from ..types import LeftShift, TopShift
 from .abstract import Resampler
 from .bicubic import Bicubic
 from .complex import ComplexScaler
@@ -102,7 +103,7 @@ def _clean_args(self, **kwargs: Any) -> dict[str, Any]:
         return kwargs
 
     def get_scale_args(
-        self, clip: vs.VideoNode, shift: tuple[float, float] = (0, 0),
+        self, clip: vs.VideoNode, shift: tuple[TopShift, LeftShift] = (0, 0),
         width: int | None = None, height: int | None = None,
         *funcs: Callable[..., Any], **kwargs: Any
     ) -> dict[str, Any]:
@@ -124,7 +125,7 @@ def get_params_args(
     @overload  # type: ignore
     @inject_self.cached
     @inject_kwargs_params
-    def shift(self, clip: vs.VideoNode, shift: tuple[float, float] = (0, 0), **kwargs: Any) -> vs.VideoNode:
+    def shift(self, clip: vs.VideoNode, shift: tuple[TopShift, LeftShift] = (0, 0), **kwargs: Any) -> vs.VideoNode:
         ...
 
     @overload  # type: ignore

vskernels/kernels/impulse.py

@@ -5,6 +5,7 @@
 from stgpytools import inject_kwargs_params
 from vstools import inject_self, vs
 
+from ..types import LeftShift, TopShift
 from .fmtconv import FmtConv
 
 __all__ = [
@@ -43,7 +44,7 @@ def __init__(self, impulse: Sequence[float], oversample: int = 8, taps: float =
     @inject_self.cached
     @inject_kwargs_params
     def scale(  # type: ignore[override]
-        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (-0.125, -0.125), **kwargs: Any
+        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (-0.125, -0.125), **kwargs: Any
     ) -> vs.VideoNode:
         return super().scale(clip, width, height, shift, **kwargs)
 

vskernels/kernels/placebo.py

@@ -6,6 +6,7 @@
 from stgpytools import inject_kwargs_params
 from vstools import Transfer, TransferT, core, fallback, inject_self, vs
 
+from ..types import Center, LeftShift, Slope, TopShift
 from .complex import LinearScaler
 
 __all__ = [
@@ -56,8 +57,8 @@ def __init__(
     @inject_self.cached
     @inject_kwargs_params
     def scale(  # type: ignore[override]
-        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0),
-        *, linear: bool = True, sigmoid: bool | tuple[float, float] = True, curve: TransferT | None = None,
+        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0),
+        *, linear: bool = True, sigmoid: bool | tuple[Slope, Center] = True, curve: TransferT | None = None,
         **kwargs: Any
     ) -> vs.VideoNode:
         return super().scale(
@@ -66,7 +67,7 @@ def scale(  # type: ignore[override]
         )
 
     def get_scale_args(
-        self, clip: vs.VideoNode, shift: tuple[float, float] = (0, 0),
+        self, clip: vs.VideoNode, shift: tuple[TopShift, LeftShift] = (0, 0),
         width: int | None = None, height: int | None = None,
         *funcs: Callable[..., Any], **kwargs: Any
     ) -> dict[str, Any]:

vskernels/kernels/zimg.py

@@ -5,6 +5,7 @@
 from stgpytools import inject_kwargs_params
 from vstools import CustomIntEnum, inject_self, vs
 
+from ..types import Center, LeftShift, Slope, TopShift
 from .abstract import Descaler
 from .complex import ComplexKernel
 
@@ -26,7 +27,7 @@ class ZimgDescaler(Descaler):
         @inject_self.cached
         @inject_kwargs_params
         def descale(  # type: ignore[override]
-            self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0),
+            self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0),
             *, blur: float = 1.0, border_handling: BorderHandlingT = BorderHandling.MIRROR, **kwargs: Any
         ) -> vs.VideoNode:
             ...
@@ -37,9 +38,9 @@ class ZimgComplexKernel(ComplexKernel, ZimgDescaler):  # type: ignore
         @inject_self.cached
         @inject_kwargs_params
         def descale(  # type: ignore[override]
-            self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0),
+            self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0),
             *, blur: float = 1.0, border_handling: BorderHandlingT, ignore_mask: vs.VideoNode | None = None,
-            linear: bool = False, sigmoid: bool | tuple[float, float] = False, **kwargs: Any
+            linear: bool = False, sigmoid: bool | tuple[Slope, Center] = False, **kwargs: Any
         ) -> vs.VideoNode:
             ...
 

vskernels/types.py

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+from typing import TypeAlias
+
+__all__ = [
+    'TopShift',
+    'LeftShift'
+]
+
+TopShift: TypeAlias = float
+LeftShift: TypeAlias = float
+Slope: TypeAlias = float
+Center: TypeAlias = float

vskernels/util.py

@@ -15,6 +15,7 @@
     Point, Resampler, ResamplerT, Scaler, ZimgComplexKernel, ZimgDescaler
 )
 from .kernels.bicubic import MemeKernel
+from .types import Center, LeftShift, Slope, TopShift
 
 __all__ = [
     'abstract_kernels', 'excluded_kernels',
@@ -85,7 +86,7 @@ class NoScaleBase(Scaler):
     @inject_self.cached
     @inject_kwargs_params
     def scale(  # type: ignore
-        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[float, float] = (0, 0), **kwargs: Any
+        self, clip: vs.VideoNode, width: int, height: int, shift: tuple[TopShift, LeftShift] = (0, 0), **kwargs: Any
     ) -> vs.VideoNode:
         try:
             return super().scale(clip, clip.width, clip.height, shift, **kwargs)  # type: ignore
@@ -144,7 +145,7 @@ class LinearLight:
     clip: vs.VideoNode
 
     linear: bool = True
-    sigmoid: bool | tuple[float, float] = False
+    sigmoid: bool | tuple[Slope, Center] = False
 
     resampler: ResamplerT | None = Catrom
 
@@ -176,7 +177,7 @@ def linear(self) -> vs.VideoNode:
 
             return wclip
 
-        @linear.setter
+        @linear.setter  # type: ignore
         def linear(self, processed: vs.VideoNode) -> None:
             if self.ll._exited:
                 raise CustomRuntimeError('You can\'t set .linear after going out of the context manager!')
@@ -190,7 +191,7 @@ def out(self) -> vs.VideoNode:
             if not hasattr(self, '_linear'):
                 raise CustomValueError('You need to set .linear before getting .out!', self.__class__)
 
-            processed = self._linear
+            processed = self._linear  # type: ignore
 
             if self.ll.sigmoid:
                 processed = processed.std.Expr(