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function c=comp_dgt(f,g,a,M,lt,phasetype,algfir,algns)
%-*- texinfo -*-
%@deftypefn {Function} comp_dgt
%@verbatim
%COMP_DGT Compute a DGT
% Usage: c=comp_dgt(f,g,a,M,L,phasetype);
%
% Input parameters:
% f : Input data
% g : Window function.
% a : Length of time shift.
% M : Number of modulations.
% L : Length of transform to do.
% lt : Lattice type
% phasetype : Type of phase
% algtype : Select algorithm
% Output parameters:
% c : M*N*W array of coefficients.
%
% If phasetype is zero, a freq-invariant transform is computed. If
% phase-type is one, a time-invariant transform is computed.
%
% The algorithm chooser do the following:
%
% algfir=0 : Default value, automatically choose the fastest
% algorithm.
%
% algfir=1 : Choose the algorithm depending on the input.
%
% algns=0 : Default value, automatically choose the fastest
% algorithm.
%
% algns=1 : Always choose multiwindow.
%
% algns=2 : Always choose shear
%@end verbatim
%@strong{Url}: @url{http://ltfat.github.io/doc/comp/comp_dgt.html}
%@end deftypefn
% Copyright (C) 2005-2016 Peter L. Soendergaard <peter@sonderport.dk>.
% This file is part of LTFAT version 2.3.1
%
% 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/>.
% AUTHOR : Peter L. Soendergaard.
% TESTING: OK
% REFERENCE: OK
L=size(f,1);
if lt(2)==1
c=comp_sepdgt(f,g,a,M,phasetype);
else
g=fir2long(g,L);
if (algns==0 && lt(2)<=2) || (algns==1)
c=comp_nonsepdgt_multi(f,g,a,M,lt);
else
[s0,s1,br] = shearfind(L,a,M,lt);
c=comp_nonsepdgt_shear(f,g,a,M,s0,s1,br);
end;
% FIXME : Calls non-comp function
if phasetype==1
c=phaselock(c,a,'lt',lt);
end;
end;
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