fix auto device

BiRefNet_node.py

@@ -44,14 +44,6 @@ class BiRefNet_node:
         self.ready = False
 
     def load(self, weight_path, device, verbose=False):
-        # process auto
-        if device == "auto":
-            if torch.backends.mps.is_available():
-                device = "mps"
-            elif torch.cuda.is_available():
-                device = "cuda"
-            else:
-                device = "cpu"
         # load model
         self.model = BiRefNet()
         state_dict = torch.load(weight_path, map_location='cpu')
@@ -97,6 +89,15 @@ class BiRefNet_node:
     CATEGORY = "Fooocus"
 
     def matting(self, image, device):
+        # process auto deivce
+        if device == "auto":
+            if torch.backends.mps.is_available():
+                device = "mps"
+            elif torch.cuda.is_available():
+                device = "cuda"
+            else:
+                device = "cpu"
+
         if not self.ready:
             weight_path = os.path.join(models_dir, "BiRefNet", "BiRefNet-ep480.pth")
             self.load(weight_path, device=device)