Update Nnedi3.interpolate to support sneedif

vsaa/antialiasers/nnedi3.py

@@ -32,11 +32,16 @@ def get_aa_args(self, clip: vs.VideoNode, **kwargs: Any) -> dict[str, Any]:
         return dict(nsize=self.nsize, nns=self.nns, qual=self.qual, etype=self.etype, pscrn=pscrn)
 
     def interpolate(self, clip: vs.VideoNode, double_y: bool, **kwargs: Any) -> vs.VideoNode:
-        interpolated: vs.VideoNode = getattr(
-            core, 'znedi3' if hasattr(core, 'znedi3') else 'nnedi3'
-        ).nnedi3(
-            clip, self.field, double_y or not self.drop_fields, **kwargs
-        )
+        if not (hasattr(core, 'znedi3') or hasattr(core, 'nnedi3')):
+            interpolated: vs.VideoNode = self.full_interpolate(
+                clip, double_y or not self.drop_fields, False, **kwargs
+            )
+        else:
+            interpolated = getattr(
+                core, 'znedi3' if hasattr(core, 'znedi3') else 'nnedi3'
+            ).nnedi3(
+                clip, self.field, double_y or not self.drop_fields, **kwargs
+            )
 
         return self.shift_interpolate(clip, interpolated, double_y, **kwargs)