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tests: FFT of a constant input
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@ -8,6 +8,7 @@ check_PROGRAMS = $(TESTS)
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test_SOURCES = \
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test_SOURCES = \
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test-audio.cc \
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test-audio.cc \
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test-fft.cc \
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test-utils.cc \
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test-utils.cc \
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test.cc \
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test.cc \
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test.h
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test.h
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65
tests/test-fft.cc
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65
tests/test-fft.cc
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@ -0,0 +1,65 @@
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/* test-fft.cc
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*
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* Copyright (C) 2013 Alexander Kojevnikov <alexander@kojevnikov.com>
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*
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* Spek 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 of the License, or
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* (at your option) any later version.
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*
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* Spek 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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*
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* You should have received a copy of the GNU General Public License
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* along with Spek. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "spek-fft.h"
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#include "test.h"
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static void test_const()
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{
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FFT fft;
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for (int nbits = 4; nbits < 16; ++nbits) {
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auto plan = fft.create(nbits);
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test("input size", 1 << nbits, plan->get_input_size());
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test("output size", (1 << nbits) / 2 + 1, plan->get_output_size());
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// Test zero input.
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for (int i = 0; i < plan->get_input_size(); ++i) {
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plan->set_input(i, 0.0f);
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}
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plan->execute();
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bool ok = true;
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for (int i = 0; i < plan->get_output_size(); ++i) {
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if (plan->get_output(i) > -1e12f) {
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ok = false;
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break;
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}
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}
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test("zero input", true, ok);
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// Test DC input.
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for (int i = 0; i < plan->get_input_size(); ++i) {
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plan->set_input(i, 1.0f);
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}
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plan->execute();
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ok = true;
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test("dc component", 0.0f, plan->get_output(0));
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for (int i = 1; i < plan->get_output_size(); ++i) {
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if (plan->get_output(i) > -1e12f) {
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ok = false;
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break;
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}
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}
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test("dc input", true, ok);
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}
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}
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void test_fft()
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{
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run("fft const", test_const);
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}
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@ -26,6 +26,7 @@ int main()
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std::cerr << "-------------" << std::endl;
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std::cerr << "-------------" << std::endl;
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test_audio();
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test_audio();
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test_fft();
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test_utils();
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test_utils();
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if (g_passes < g_total) {
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if (g_passes < g_total) {
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@ -52,6 +52,7 @@ template<class T> void test(const std::string& message, const T& expected, const
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}
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}
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void test_audio();
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void test_audio();
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void test_fft();
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void test_utils();
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void test_utils();
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#endif
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#endif
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