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/*
* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "common_audio/window_generator.h"
#include <cstring>
#include "test/gtest.h"
namespace webrtc {
TEST(WindowGeneratorTest, KaiserBesselDerived) {
float window[7];
memset(window, 0, sizeof(window));
WindowGenerator::KaiserBesselDerived(0.397856f, 2, window);
ASSERT_NEAR(window[0], 0.707106f, 1e-6f);
ASSERT_NEAR(window[1], 0.707106f, 1e-6f);
ASSERT_NEAR(window[2], 0.0f, 1e-6f);
ASSERT_NEAR(window[3], 0.0f, 1e-6f);
ASSERT_NEAR(window[4], 0.0f, 1e-6f);
ASSERT_NEAR(window[5], 0.0f, 1e-6f);
ASSERT_NEAR(window[6], 0.0f, 1e-6f);
WindowGenerator::KaiserBesselDerived(0.397856f, 3, window);
ASSERT_NEAR(window[0], 0.598066f, 1e-6f);
ASSERT_NEAR(window[1], 0.922358f, 1e-6f);
ASSERT_NEAR(window[2], 0.598066f, 1e-6f);
ASSERT_NEAR(window[3], 0.0f, 1e-6f);
ASSERT_NEAR(window[4], 0.0f, 1e-6f);
ASSERT_NEAR(window[5], 0.0f, 1e-6f);
ASSERT_NEAR(window[6], 0.0f, 1e-6f);
WindowGenerator::KaiserBesselDerived(0.397856f, 6, window);
ASSERT_NEAR(window[0], 0.458495038865344f, 1e-6f);
ASSERT_NEAR(window[1], 0.707106781186548f, 1e-6f);
ASSERT_NEAR(window[2], 0.888696967101760f, 1e-6f);
ASSERT_NEAR(window[3], 0.888696967101760f, 1e-6f);
ASSERT_NEAR(window[4], 0.707106781186548f, 1e-6f);
ASSERT_NEAR(window[5], 0.458495038865344f, 1e-6f);
ASSERT_NEAR(window[6], 0.0f, 1e-6f);
}
TEST(WindowGeneratorTest, Hanning) {
float window[7];
memset(window, 0, sizeof(window));
window[0] = -1.0f;
window[1] = -1.0f;
WindowGenerator::Hanning(2, window);
ASSERT_NEAR(window[0], 0.0f, 1e-6f);
ASSERT_NEAR(window[1], 0.0f, 1e-6f);
ASSERT_NEAR(window[2], 0.0f, 1e-6f);
ASSERT_NEAR(window[3], 0.0f, 1e-6f);
ASSERT_NEAR(window[4], 0.0f, 1e-6f);
ASSERT_NEAR(window[5], 0.0f, 1e-6f);
ASSERT_NEAR(window[6], 0.0f, 1e-6f);
window[0] = -1.0f;
window[2] = -1.0f;
WindowGenerator::Hanning(3, window);
ASSERT_NEAR(window[0], 0.0f, 1e-6f);
ASSERT_NEAR(window[1], 1.0f, 1e-6f);
ASSERT_NEAR(window[2], 0.0f, 1e-6f);
ASSERT_NEAR(window[3], 0.0f, 1e-6f);
ASSERT_NEAR(window[4], 0.0f, 1e-6f);
ASSERT_NEAR(window[5], 0.0f, 1e-6f);
ASSERT_NEAR(window[6], 0.0f, 1e-6f);
window[0] = -1.0f;
window[5] = -1.0f;
WindowGenerator::Hanning(6, window);
ASSERT_NEAR(window[0], 0.0f, 1e-6f);
ASSERT_NEAR(window[1], 0.345491f, 1e-6f);
ASSERT_NEAR(window[2], 0.904508f, 1e-6f);
ASSERT_NEAR(window[3], 0.904508f, 1e-6f);
ASSERT_NEAR(window[4], 0.345491f, 1e-6f);
ASSERT_NEAR(window[5], 0.0f, 1e-6f);
ASSERT_NEAR(window[6], 0.0f, 1e-6f);
}
} // namespace webrtc
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