I'm sorry, I don't know where to start from or what to look for in these code bases.
The function load_xdf.m from xdf-modules/xdf-Matlab is the one I've been using:
Please feel free to open PR to fix the XDF reader directly on the Brainstorm github repo:
function [DataMat, ChannelMat] = in_data_xdf(DataFile)
% IN_DATA_XDF: Read XDF files.
%
% REFERENCE: https://github.com/xdf-modules/xdf-Matlab
% @=============================================================================
% This function is part of the Brainstorm software:
% https://neuroimage.usc.edu/brainstorm
%
% Copyright (c) University of Southern California & McGill University
% This software is distributed under the terms of the GNU General Public License
% as published by the Free Software Foundation. Further details on the GPLv3
% license can be found at http://www.gnu.org/copyleft/gpl.html.
%
% FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
% UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
% WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
% MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
% LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
%
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