Add option to define dtype externally for highpass-filter

src/spikeinterface/preprocessing/highpass_spatial_filter.py

@@ -3,6 +3,7 @@
 import numpy as np
 
 from .basepreprocessor import BasePreprocessor, BasePreprocessorSegment
+from .filter import fix_dtype
 from ..core import order_channels_by_depth, get_chunk_with_margin
 from ..core.core_tools import define_function_from_class
 
@@ -47,6 +48,8 @@ class HighpassSpatialFilterRecording(BasePreprocessor):
         Order of spatial butterworth filter
     highpass_butter_wn : float, default: 0.01
         Critical frequency (with respect to Nyquist) of spatial butterworth filter
+    dtype : dtype, default: None
+        The dtype of the output traces. If None, the dtype is the same as the input traces
 
     Returns
     -------
@@ -73,6 +76,7 @@ def __init__(
         agc_window_length_s=0.1,
         highpass_butter_order=3,
         highpass_butter_wn=0.01,
+        dtype=None,
     ):
         BasePreprocessor.__init__(self, recording)
 
@@ -117,7 +121,7 @@ def __init__(
         butter_kwargs = dict(btype="highpass", N=highpass_butter_order, Wn=highpass_butter_wn)
         sos_filter = scipy.signal.butter(**butter_kwargs, output="sos")
 
-        dtype = recording.get_dtype()
+        dtype = fix_dtype(recording, dtype)
 
         for parent_segment in recording._recording_segments:
             rec_segment = HighPassSpatialFilterSegment(