3 # Copyright 2005,2006,2007,2010 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
24 from gnuradio import blks2
31 #raw_input('Attach with gdb, then press Enter: ')
37 r.append(float(random.randint(-32768, 32768)))
41 def reference_dec_filter(src_data, decim, taps):
43 src = gr.vector_source_f(src_data)
44 op = gr.fir_filter_fff(decim, taps)
45 dst = gr.vector_sink_f()
46 tb.connect(src, op, dst)
48 result_data = dst.data()
52 def reference_interp_filter(src_data, interp, taps):
54 src = gr.vector_source_f(src_data)
55 op = gr.interp_fir_filter_fff(interp, taps)
56 dst = gr.vector_sink_f()
57 tb.connect(src, op, dst)
59 result_data = dst.data()
63 def reference_interp_dec_filter(src_data, interp, decim, taps):
65 src = gr.vector_source_f(src_data)
66 up = gr.interp_fir_filter_fff(interp, (1,))
67 dn = gr.fir_filter_fff(decim, taps)
68 dst = gr.vector_sink_f()
69 tb.connect(src, up, dn, dst)
71 result_data = dst.data()
76 class test_rational_resampler (gr_unittest.TestCase):
85 # test the gr.rational_resampler_base primitives...
88 def test_000_1_to_1(self):
90 src_data = (234, -4, 23, -56, 45, 98, -23, -7)
91 xr = (-936, 1186, -112, 339, -460, -167, 582)
92 expected_result = tuple([float(x) for x in xr])
95 src = gr.vector_source_f(src_data)
96 op = gr.rational_resampler_base_fff(1, 1, taps)
97 dst = gr.vector_sink_f()
101 result_data = dst.data()
102 self.assertEqual(expected_result, result_data)
104 def test_001_interp(self):
105 taps = [1, 10, 100, 1000, 10000]
106 src_data = (0, 2, 3, 5, 7, 11, 13, 17)
108 xr = (0,0,0,0,2,20,200,2003,20030,300,3005,30050,500,5007,50070,700,7011,70110,1100,11013,110130,1300,13017,130170,1700.0,17000.0,170000.0)
109 expected_result = tuple([float(x) for x in xr])
112 src = gr.vector_source_f(src_data)
113 op = gr.rational_resampler_base_fff(interpolation, 1, taps)
114 dst = gr.vector_sink_f()
118 result_data = dst.data()
119 self.assertEqual(expected_result, result_data)
121 def test_002_interp(self):
122 taps = random_floats(31)
123 #src_data = random_floats(10000) # FIXME the 10k case fails!
124 src_data = random_floats(1000)
127 expected_result = reference_interp_filter(src_data, interpolation, taps)
130 src = gr.vector_source_f(src_data)
131 op = gr.rational_resampler_base_fff(interpolation, 1, taps)
132 dst = gr.vector_sink_f()
136 result_data = dst.data()
138 L1 = len(result_data)
139 L2 = len(expected_result)
142 sys.stderr.write('delta = %2d: ntaps = %d interp = %d ilen = %d\n' %
143 (L2 - L1, len(taps), interpolation, len(src_data)))
144 sys.stderr.write(' len(result_data) = %d len(expected_result) = %d\n' %
145 (len(result_data), len(expected_result)))
146 #self.assertEqual(expected_result[0:L], result_data[0:L])
147 # FIXME check first 3 answers
148 self.assertEqual(expected_result[3:L], result_data[3:L])
150 def test_003_interp(self):
151 taps = random_floats(31)
152 src_data = random_floats(10000)
155 expected_result = reference_dec_filter(src_data, decimation, taps)
158 src = gr.vector_source_f(src_data)
159 op = gr.rational_resampler_base_fff(1, decimation, taps)
160 dst = gr.vector_sink_f()
164 result_data = dst.data()
166 L1 = len(result_data)
167 L2 = len(expected_result)
170 sys.stderr.write('delta = %2d: ntaps = %d decim = %d ilen = %d\n' %
171 (L2 - L1, len(taps), decimation, len(src_data)))
172 sys.stderr.write(' len(result_data) = %d len(expected_result) = %d\n' %
173 (len(result_data), len(expected_result)))
174 self.assertEqual(expected_result[0:L], result_data[0:L])
176 # FIXME disabled. Triggers hang on SuSE 10.0
177 def xtest_004_decim_random_vals(self):
182 random.seed(0) # we want reproducibility
184 for ntaps in xrange(1, MAX_TAPS + 1):
185 for decim in xrange(1, MAX_DECIM+1):
186 for ilen in xrange(ntaps + decim, ntaps + OUTPUT_LEN*decim):
187 src_data = random_floats(ilen)
188 taps = random_floats(ntaps)
189 expected_result = reference_dec_filter(src_data, decim, taps)
192 src = gr.vector_source_f(src_data)
193 op = gr.rational_resampler_base_fff(1, decim, taps)
194 dst = gr.vector_sink_f()
195 tb.connect(src, op, dst)
198 result_data = dst.data()
199 L1 = len(result_data)
200 L2 = len(expected_result)
203 sys.stderr.write('delta = %2d: ntaps = %d decim = %d ilen = %d\n' % (L2 - L1, ntaps, decim, ilen))
204 sys.stderr.write(' len(result_data) = %d len(expected_result) = %d\n' %
205 (len(result_data), len(expected_result)))
206 self.assertEqual(expected_result[0:L], result_data[0:L])
209 # FIXME disabled. Triggers hang on SuSE 10.0
210 def xtest_005_interp_random_vals(self):
215 random.seed(0) # we want reproducibility
217 for ntaps in xrange(1, MAX_TAPS + 1):
218 for interp in xrange(1, MAX_INTERP+1):
219 for ilen in xrange(ntaps, ntaps + INPUT_LEN):
220 src_data = random_floats(ilen)
221 taps = random_floats(ntaps)
222 expected_result = reference_interp_filter(src_data, interp, taps)
225 src = gr.vector_source_f(src_data)
226 op = gr.rational_resampler_base_fff(interp, 1, taps)
227 dst = gr.vector_sink_f()
228 tb.connect(src, op, dst)
231 result_data = dst.data()
232 L1 = len(result_data)
233 L2 = len(expected_result)
235 #if True or abs(L1-L2) > 1:
237 sys.stderr.write('delta = %2d: ntaps = %d interp = %d ilen = %d\n' % (L2 - L1, ntaps, interp, ilen))
238 #sys.stderr.write(' len(result_data) = %d len(expected_result) = %d\n' %
239 # (len(result_data), len(expected_result)))
240 #self.assertEqual(expected_result[0:L], result_data[0:L])
241 # FIXME check first ntaps+1 answers
242 self.assertEqual(expected_result[ntaps+1:L], result_data[ntaps+1:L])
245 def test_006_interp_decim(self):
247 src_data = range(10000)
251 expected_result = reference_interp_dec_filter(src_data, interp, decimation, taps)
254 src = gr.vector_source_f(src_data)
255 op = gr.rational_resampler_base_fff(interp, decimation, taps)
256 dst = gr.vector_sink_f()
260 result_data = dst.data()
262 L1 = len(result_data)
263 L2 = len(expected_result)
266 sys.stderr.write('delta = %2d: ntaps = %d decim = %d ilen = %d\n' %
267 (L2 - L1, len(taps), decimation, len(src_data)))
268 sys.stderr.write(' len(result_data) = %d len(expected_result) = %d\n' %
269 (len(result_data), len(expected_result)))
270 self.assertEqual(expected_result[1:L], result_data[1:L])
273 # test the blks2.rational_resampler_??? primitives...
276 def test_101_interp(self):
277 taps = [1, 10, 100, 1000, 10000]
278 src_data = (0, 2, 3, 5, 7, 11, 13, 17)
280 xr = (0,0,0,0,2,20,200,2003,20030,300,3005,30050,500,5007,50070,700,7011,70110,1100,11013,110130,1300,13017,130170,1700.0,17000.0,170000.0)
281 expected_result = tuple([float(x) for x in xr])
284 src = gr.vector_source_f(src_data)
285 op = blks2.rational_resampler_fff(interpolation, 1, taps=taps)
286 dst = gr.vector_sink_f()
290 result_data = dst.data()
291 self.assertEqual(expected_result, result_data)
294 if __name__ == '__main__':
296 # FIXME: Disabled, see ticket:210
297 # gr_unittest.run(test_rational_resampler, "test_rational_resampler.xml")