Fix apply_codec to use named file

Follow-up pytorch#3386 The intended change was to use path of temporary
file, instead of file-like object

torchaudio/_internal/module_utils.py

@@ -46,6 +46,7 @@ def deprecated(direction: str, version: Optional[str] = None, remove: bool = Fal
     Args:
         direction (str): Migration steps to be given to users.
         version (str or int): The version when the object will be removed
+        remove (bool): If enabled, message about future removal is amended.
     """
 
     def decorator(func):

torchaudio/functional/functional.py

@@ -1330,12 +1330,11 @@ def apply_codec(
         Tensor: Resulting Tensor.
         If ``channels_first=True``, it has `(channel, time)` else `(time, channel)`.
     """
-    with tempfile.TemporaryFile() as f:
+    with tempfile.NamedTemporaryFile() as f:
         torchaudio.backend.sox_io_backend.save(
-            f, waveform, sample_rate, channels_first, compression, format, encoding, bits_per_sample
+            f.name, waveform, sample_rate, channels_first, compression, format, encoding, bits_per_sample
         )
-        f.seek(0)
-        augmented, sr = torchaudio.backend.sox_io_backend.load(f, channels_first=channels_first, format=format)
+        augmented, sr = torchaudio.backend.sox_io_backend.load(f.name, channels_first=channels_first, format=format)
     if sr != sample_rate:
         augmented = resample(augmented, sr, sample_rate)
     return augmented