3 * Copyright 2002,2007 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 #include <cppunit/TestAssert.h>
24 #include <qa_gri_mmse_fir_interpolator_cc.h>
25 #include <gri_mmse_fir_interpolator_cc.h>
30 #define NELEM(x) (sizeof (x) / sizeof (x[0]))
34 test_fcn_sin(double index)
36 return (2 * sin (index * 0.25 * 2 * M_PI + 0.125 * M_PI)
37 + 3 * sin (index * 0.077 * 2 * M_PI + 0.3 * M_PI));
41 test_fcn_cos(double index)
43 return (2 * cos (index * 0.25 * 2 * M_PI + 0.125 * M_PI)
44 + 3 * cos (index * 0.077 * 2 * M_PI + 0.3 * M_PI));
48 test_fcn(double index)
50 return gr_complex(test_fcn_cos(index), test_fcn_sin(index));
55 qa_gri_mmse_fir_interpolator_cc::t1()
57 static const unsigned N = 100;
58 gr_complex input[N + 10] __attribute__ ((aligned (8)));
60 for (unsigned i = 0; i < NELEM(input); i++)
61 input[i] = test_fcn ((double) i);
63 gri_mmse_fir_interpolator_cc intr;
64 float inv_nsteps = 1.0 / intr.nsteps ();
66 for (unsigned i = 0; i < N; i++){
67 for (unsigned imu = 0; imu <= intr.nsteps (); imu += 1){
68 gr_complex expected = test_fcn ((i + 3) + imu * inv_nsteps);
69 gr_complex actual = intr.interpolate (&input[i], imu * inv_nsteps);
71 CPPUNIT_ASSERT_COMPLEXES_EQUAL (expected, actual, 0.004);
72 // printf ("%9.6f %9.6f %9.6f\n", expected, actual, expected - actual);
79 * Force bad alignment and confirm that it raises an exception
82 qa_gri_mmse_fir_interpolator_cc::t2_body()
84 static const unsigned N = 100;
85 float float_input[2*(N+10) + 1];
88 // We require that gr_complex be aligned on an 8-byte boundary.
89 // Ensure that we ARE NOT ;)
91 if (((intptr_t) float_input & 0x7) == 0)
92 input = reinterpret_cast<gr_complex *>(&float_input[1]);
94 input = reinterpret_cast<gr_complex *>(&float_input[0]);
97 for (unsigned i = 0; i < (N+10); i++)
98 input[i] = test_fcn ((double) i);
100 gri_mmse_fir_interpolator_cc intr;
101 float inv_nsteps = 1.0 / intr.nsteps ();
103 for (unsigned i = 0; i < N; i++){
104 for (unsigned imu = 0; imu <= intr.nsteps (); imu += 1){
105 gr_complex expected = test_fcn ((i + 3) + imu * inv_nsteps);
106 gr_complex actual = intr.interpolate (&input[i], imu * inv_nsteps);
108 CPPUNIT_ASSERT_COMPLEXES_EQUAL (expected, actual, 0.004);
109 // printf ("%9.6f %9.6f %9.6f\n", expected, actual, expected - actual);
115 qa_gri_mmse_fir_interpolator_cc::t2()
117 CPPUNIT_ASSERT_THROW(t2_body(), std::invalid_argument);