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* Copyright 2002,2007 Free Software Foundation, Inc.
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* This file is part of GNU Radio
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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#include <cppunit/TestAssert.h>
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#include <qa_gri_mmse_fir_interpolator_cc.h>
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#include <gri_mmse_fir_interpolator_cc.h>
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#define NELEM(x) (sizeof (x) / sizeof (x[0]))
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test_fcn_sin(double index)
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return (2 * sin (index * 0.25 * 2 * M_PI + 0.125 * M_PI)
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+ 3 * sin (index * 0.077 * 2 * M_PI + 0.3 * M_PI));
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test_fcn_cos(double index)
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return (2 * cos (index * 0.25 * 2 * M_PI + 0.125 * M_PI)
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+ 3 * cos (index * 0.077 * 2 * M_PI + 0.3 * M_PI));
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test_fcn(double index)
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return gr_complex(test_fcn_cos(index), test_fcn_sin(index));
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qa_gri_mmse_fir_interpolator_cc::t1()
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static const unsigned N = 100;
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gr_complex input[N + 10] __attribute__ ((aligned (8)));
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for (unsigned i = 0; i < NELEM(input); i++)
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input[i] = test_fcn ((double) i);
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gri_mmse_fir_interpolator_cc intr;
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float inv_nsteps = 1.0 / intr.nsteps ();
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for (unsigned i = 0; i < N; i++){
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for (unsigned imu = 0; imu <= intr.nsteps (); imu += 1){
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gr_complex expected = test_fcn ((i + 3) + imu * inv_nsteps);
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gr_complex actual = intr.interpolate (&input[i], imu * inv_nsteps);
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CPPUNIT_ASSERT_COMPLEXES_EQUAL (expected, actual, 0.004);
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// printf ("%9.6f %9.6f %9.6f\n", expected, actual, expected - actual);
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* Force bad alignment and confirm that it raises an exception
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qa_gri_mmse_fir_interpolator_cc::t2_body()
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static const unsigned N = 100;
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float float_input[2*(N+10) + 1];
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// We require that gr_complex be aligned on an 8-byte boundary.
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// Ensure that we ARE NOT ;)
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if (((intptr_t) float_input & 0x7) == 0)
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input = reinterpret_cast<gr_complex *>(&float_input[1]);
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input = reinterpret_cast<gr_complex *>(&float_input[0]);
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for (unsigned i = 0; i < (N+10); i++)
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input[i] = test_fcn ((double) i);
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gri_mmse_fir_interpolator_cc intr;
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float inv_nsteps = 1.0 / intr.nsteps ();
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for (unsigned i = 0; i < N; i++){
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for (unsigned imu = 0; imu <= intr.nsteps (); imu += 1){
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gr_complex expected = test_fcn ((i + 3) + imu * inv_nsteps);
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gr_complex actual = intr.interpolate (&input[i], imu * inv_nsteps);
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CPPUNIT_ASSERT_COMPLEXES_EQUAL (expected, actual, 0.004);
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// printf ("%9.6f %9.6f %9.6f\n", expected, actual, expected - actual);
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qa_gri_mmse_fir_interpolator_cc::t2()
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CPPUNIT_ASSERT_THROW(t2_body(), std::invalid_argument);