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function test_failed=test_pfilt
Lr =[27,100,213];
%-*- texinfo -*-
%@deftypefn {Function} test_pfilt
%@verbatim
%
%@end verbatim
%@strong{Url}: @url{http://ltfat.github.io/doc/testing/test_pfilt.html}
%@end deftypefn
% Copyright (C) 2005-2016 Peter L. Soendergaard <peter@sonderport.dk>.
% This file is part of LTFAT version 2.2.0
%
% 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/>.
gr{1}=randn(20,1);
gr{2}=randn(21,1);
gr{3}=firfilter('hanning',19);
gr{4}=firfilter('hanning',20);
gr{5}=randn(4,1);
gr{6}=firfilter('hanning',20,'causal');
gr{7}=firfilter('hanning',20,'delay',13);
gr{8}=firfilter('hanning',20,'delay',-13);
gr{7}=firfilter('hanning',20,'delay',14);
gr{8}=firfilter('hanning',20,'delay',-14);
gr{9}=firfilter('hamming',19,.3);
gr{10}=firfilter('hamming',19,.3,'real');
gr{11}=blfilter('hanning',.19);
gr{12}=blfilter('hanning',.2);
gr{13}=blfilter('hanning',.132304);
gr{14}=blfilter('hanning',.23,'delay',13);
gr{15}=blfilter('hamming',.23,.3);
gr{16}=blfilter('hamming',.23,.3,'real');
% (almost) Allpass filter
gr{17}=blfilter('hanning',2);
gr{18}=blfilter('hanning',1);
gr{19}=blfilter('hanning',2,1);
gr{20}=blfilter('hanning',1,-1);
gr{21}=blfilter('hamming',.1,-.3);
gr{22}=blfilter('hanning',1.7);
% REMARK: modcent is applied to fc
test_failed=0;
disp(' =============== TEST_PFILT ==============');
disp('--- Used subroutines ---');
which comp_filterbank_td
which comp_filterbank_fft
which comp_filterbank_fftbl
which comp_filterbank
disp('--- Regular subsampling ---');
for ii=1:numel(gr)
% Skip empry fields in gr
g=gr{ii};
if isempty(g)
continue;
end
for a=1:3
for jj=1:length(Lr)
% Create input signal of proper length
L=ceil(Lr(jj)/a)*a;
for W=1:3
for rtype=1:2
if rtype==1
rname='REAL ';
f=tester_rand(L,W);
else
rname='CMPLX';
f=tester_crand(L,W);
end;
h2=ref_pfilt(f,g,a);
h1=pfilt(f,g,a);
res=norm(h1-h2);
[test_failed,fail]=ltfatdiditfail(res,test_failed);
s=sprintf('PFILT %3s filtno:%3i L:%3i W:%3i a:%3i %0.5g %s',rname,ii,L,W,a,res,fail);
disp(s);
end;
end;
end;
end;
end;
disp('--- Fractional subsampling ---');
% Pick just bl filters
idx = cellfun(@(grEl) isfield(grEl,'H'),gr);
tmpRange = 1:numel(gr);
tmpRange = tmpRange(idx);
for ii=tmpRange
g = gr{ii};
for jj=1:length(Lr)
L = Lr(jj);
% Find support and offset of the filter
tmpH = g.H(L);
if numel(tmpH) == L
% this is no longer a band pass filter
end
foff = g.foff(L);
Nmin = numel(tmpH);
for Nalt=[-3,-7,3,0];
% Nalt==0 painless
% Nalt>0 painless
% Nalt<0 not painless
if Nmin + Nalt <=0
a = [L,1];
elseif Nmin + Nalt >= L
% This is no longer fractional subsampling
a = [L,L];
else
a = [L,Nmin+Nalt];
end
for W=1:3
for rtype=1:2
if rtype==1
rname='REAL ';
f=tester_rand(L,W);
else
rname='CMPLX';
f=tester_crand(L,W);
end;
h2=ref_pfilt(f,g,a);
h1=pfilt(f,g,a);
res=norm(h1-h2);
[test_failed,fail]=ltfatdiditfail(res,test_failed);
s=sprintf('PFILT %3s filtno:%3i L:%3i W:%3i a:[%3i,%3i], fb: %i, %0.5g %s',...
rname,ii,L,W,a(1),a(2),Nmin,res,fail);
disp(s);
end
end
end
end
end
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