def create_stream(self, stream_class, id=None, name=None):
utils._check_type(stream_class, bt2_stream_class._StreamClass)
if stream_class.assigns_automatic_stream_id:
if id is not None:
raise ValueError(
"id provided, but stream class assigns automatic stream ids"
)
stream_ptr = native_bt.stream_create(stream_class._ptr, self._ptr)
else:
if id is None:
raise ValueError(
"id not provided, but stream class does not assign automatic stream ids"
)
utils._check_uint64(id)
stream_ptr = native_bt.stream_create_with_id(
stream_class._ptr, self._ptr, id
)
if stream_ptr is None:
raise bt2._MemoryError('cannot create stream object')
stream = bt2_stream._Stream._create_from_ptr(stream_ptr)
if name is not None:
stream._name = name
return stream
def __call__(self, name=None, id=None):
if name is not None:
utils._check_str(name)
if id is None:
stream_ptr = native_bt.stream_create(self._ptr, name)
else:
stream_ptr = native_bt.stream_create_with_id(self._ptr, name, id)
if stream_ptr is None:
raise bt2.CreationError('cannot create stream object')
return bt2.stream._create_from_ptr(stream_ptr)