3 # Copyright 2004 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
23 from gnuradio import gr, gr_unittest
25 class test_iir (gr_unittest.TestCase):
28 self.fg = gr.flow_graph ()
33 def test_iir_direct_001 (self):
34 src_data = (1, 2, 3, 4, 5, 6, 7, 8)
37 expected_result = (0, 0, 0, 0, 0, 0, 0, 0)
38 src = gr.vector_source_f (src_data)
39 op = gr.iir_filter_ffd (fftaps, fbtaps)
40 dst = gr.vector_sink_f ()
41 self.fg.connect (src, op)
42 self.fg.connect (op, dst)
44 result_data = dst.data ()
45 self.assertFloatTuplesAlmostEqual (expected_result, result_data)
47 def test_iir_direct_002 (self):
48 src_data = (1, 2, 3, 4, 5, 6, 7, 8)
51 expected_result = (2, 4, 6, 8, 10, 12, 14, 16)
52 src = gr.vector_source_f (src_data)
53 op = gr.iir_filter_ffd (fftaps, fbtaps)
54 dst = gr.vector_sink_f ()
55 self.fg.connect (src, op)
56 self.fg.connect (op, dst)
58 result_data = dst.data ()
59 self.assertFloatTuplesAlmostEqual (expected_result, result_data)
61 def test_iir_direct_003 (self):
62 src_data = (1, 2, 3, 4, 5, 6, 7, 8)
65 expected_result = (2, 15, 28, 41, 54, 67, 80, 93)
66 src = gr.vector_source_f (src_data)
67 op = gr.iir_filter_ffd (fftaps, fbtaps)
68 dst = gr.vector_sink_f ()
69 self.fg.connect (src, op)
70 self.fg.connect (op, dst)
72 result_data = dst.data ()
73 self.assertFloatTuplesAlmostEqual (expected_result, result_data)
75 def test_iir_direct_004 (self):
76 src_data = (1, 2, 3, 4, 5, 6, 7, 8)
79 expected_result = (2, 13, 15, 26, 28, 39, 41, 52)
80 src = gr.vector_source_f (src_data)
81 op = gr.iir_filter_ffd (fftaps, fbtaps)
82 dst = gr.vector_sink_f ()
83 self.fg.connect (src, op)
84 self.fg.connect (op, dst)
86 result_data = dst.data ()
87 self.assertFloatTuplesAlmostEqual (expected_result, result_data)
89 def test_iir_direct_005 (self):
90 src_data = (1, 2, 3, 4, 5, 6, 7, 8)
93 expected_result = (2, 13, 21, 59, 58, 186, 68, 583)
94 src = gr.vector_source_f (src_data)
95 op = gr.iir_filter_ffd (fftaps, fbtaps)
96 dst = gr.vector_sink_f ()
97 self.fg.connect (src, op)
98 self.fg.connect (op, dst)
100 result_data = dst.data ()
101 self.assertFloatTuplesAlmostEqual (expected_result, result_data)
103 def test_iir_direct_006 (self):
106 self.assertRaises ((RuntimeError, ValueError), gr.iir_filter_ffd, fftaps, fbtaps)
108 def test_iir_direct_007 (self):
109 src_data = (1, 2, 3, 4, 5, 6, 7, 8)
110 expected_result = (2, 13, 21, 59, 58, 186, 68, 583)
113 src = gr.vector_source_f (src_data)
114 op = gr.iir_filter_ffd (fftaps, fbtaps)
117 op.set_taps (fftaps, fbtaps)
118 dst = gr.vector_sink_f ()
119 self.fg.connect (src, op)
120 self.fg.connect (op, dst)
122 result_data = dst.data ()
123 self.assertFloatTuplesAlmostEqual (expected_result, result_data)
125 def test_iir_direct_008 (self):
128 op = gr.iir_filter_ffd (fftaps, fbtaps)
131 self.assertRaises ((RuntimeError, ValueError), op.set_taps, fftaps, fbtaps)
133 if __name__ == '__main__':