onnxmodel fp16_to_fp32: misc improvements (#33615)

selfdrive/modeld/runners/onnxmodel.py

@@ -14,8 +14,12 @@ def attributeproto_fp16_to_fp32(attr):
   attr.data_type = 1
   attr.raw_data = float32_list.astype(np.float32).tobytes()
 
-def convert_fp16_to_fp32(path):
-  model = onnx.load(path)
+def convert_fp16_to_fp32(onnx_path_or_bytes):
+  if isinstance(onnx_path_or_bytes, bytes):
+    model = onnx.load_from_string(onnx_path_or_bytes)
+  elif isinstance(onnx_path_or_bytes, str):
+    model = onnx.load(onnx_path_or_bytes)
+
   for i in model.graph.initializer:
     if i.data_type == 10:
       attributeproto_fp16_to_fp32(i)
@@ -23,6 +27,8 @@ def convert_fp16_to_fp32(path):
     if i.type.tensor_type.elem_type == 10:
       i.type.tensor_type.elem_type = 1
   for i in model.graph.node:
+    if i.op_type == 'Cast' and i.attribute[0].i == 10:
+      i.attribute[0].i = 1
     for a in i.attribute:
       if hasattr(a, 't'):
         if a.t.data_type == 10: