clear all;
f = gspi;
a = 256;
M = 1024;
M2 = floor(M/2) + 1; 
gl = 1024;
L = dgtlength(numel(f),a,M);
g = firwin('blackman',gl);
gd = long2fir(gabdual(g,a,M),gl);
N = L/a;


corig = dgtreal(f,{'hann',gl},a,M,'timeinv');
s = abs(corig);
cout = zeros(2*M2,N);
cout(1:numel(s)) = s(:);
coutPtr = libpointer('doublePtr',cout);
calllib('libphaseret','phaseret_spsi_d',coutPtr,L,1,a,M,libpointer(),coutPtr);

%-*- texinfo -*-
%@deftypefn {Function} test_libphaseret_spsi
%@verbatim
%cout2 = interleaved2complex(coutPtr.Value);
%@end verbatim
%@strong{Url}: @url{http://ltfat.github.io/doc/libltfat/modules/libphaseret/testing/mUnit/test_libphaseret_spsi.html}
%@end deftypefn

% Copyright (C) 2005-2016 Peter L. Soendergaard <peter@sonderport.dk>.
% This file is part of LTFAT version 2.3.0
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program.  If not, see <http://www.gnu.org/licenses/>.
cout2 = spsi(s,a,M,'timeinv');

frec = idgtreal(cout2,{'dual',{'hann',gl}},a,M,'timeinv');

s2 = dgtreal(frec,{'hann',gl},a,M,'timeinv');
magnitudeerrdb(s,s2)





