1function [m, ph, gd] = eq_compute_response(z, p, k, f, fs)
2
3%%
4% Copyright (c) 2016, Intel Corporation
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14%   * Neither the name of the Intel Corporation nor the
15%     names of its contributors may be used to endorse or promote products
16%     derived from this software without specific prior written permission.
17%
18% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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29%
30% Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
31%
32
33switch nargin
34        case 3
35                b = z;  % 1st arg
36                f = p;  % 2nd arg
37                fs = k; % 3rd arg
38                h = freqz(b, 1, f, fs);
39                m = 20*log10(abs(h));
40                ph = 180/pi*angle(h);
41
42                if length(b) == 1
43                        gd = zeros(1, length(f));
44                else
45			if exist('OCTAVE_VERSION', 'builtin')
46				% grpdelay() has some issue so better to not show a plot
47				gd = NaN * zeros(1, length(f));
48			else
49				gd = 1/fs*grpdelay(b, 1, f, fs);
50			end
51                end
52        case 5
53                [b, a] = zp2tf(z, p, k);
54                h = freqz(b, a, f, fs);
55                m = 20*log10(abs(h));
56                ph = 180/pi*angle(h);
57
58                if length(z) == 0 && length(p) == 0
59                        gd = zeros(1, length(f));
60                else
61			if exist('OCTAVE_VERSION', 'builtin')
62				% grpdelay() has some issue so better to not show a plot
63				gd = NaN * zeros(1, length(f));
64			else
65				gd = 1/fs*grpdelay(b, a, f, fs);
66			end
67                end
68        otherwise
69                error('Incorrect input parameters');
70end
71
72end
73