325cff01b4
Add code for doing block-based frequency domain processing. Developed and reviewed in isolation. Corresponding export CL: https://chromereviews.googleplex.com/95187013/ R=bercic@google.com, kjellander@webrtc.org, turaj@webrtc.org Review URL: https://webrtc-codereview.appspot.com/31539004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@7359 4adac7df-926f-26a2-2b94-8c16560cd09d
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
/*
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* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/common_audio/window_generator.h"
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#include <cstring>
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#include "testing/gtest/include/gtest/gtest.h"
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namespace webrtc {
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TEST(WindowGeneratorTest, KaiserBesselDerived) {
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float window[7];
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memset(window, 0, sizeof(window));
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WindowGenerator::KaiserBesselDerived(0.397856f, 2, window);
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ASSERT_NEAR(window[0], 0.707106f, 1e-6f);
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ASSERT_NEAR(window[1], 0.707106f, 1e-6f);
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ASSERT_NEAR(window[2], 0.0f, 1e-6f);
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ASSERT_NEAR(window[3], 0.0f, 1e-6f);
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ASSERT_NEAR(window[4], 0.0f, 1e-6f);
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ASSERT_NEAR(window[5], 0.0f, 1e-6f);
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ASSERT_NEAR(window[6], 0.0f, 1e-6f);
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WindowGenerator::KaiserBesselDerived(0.397856f, 3, window);
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ASSERT_NEAR(window[0], 0.598066f, 1e-6f);
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ASSERT_NEAR(window[1], 0.922358f, 1e-6f);
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ASSERT_NEAR(window[2], 0.598066f, 1e-6f);
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ASSERT_NEAR(window[3], 0.0f, 1e-6f);
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ASSERT_NEAR(window[4], 0.0f, 1e-6f);
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ASSERT_NEAR(window[5], 0.0f, 1e-6f);
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ASSERT_NEAR(window[6], 0.0f, 1e-6f);
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WindowGenerator::KaiserBesselDerived(0.397856f, 6, window);
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ASSERT_NEAR(window[0], 0.458495038865344f, 1e-6f);
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ASSERT_NEAR(window[1], 0.707106781186548f, 1e-6f);
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ASSERT_NEAR(window[2], 0.888696967101760f, 1e-6f);
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ASSERT_NEAR(window[3], 0.888696967101760f, 1e-6f);
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ASSERT_NEAR(window[4], 0.707106781186548f, 1e-6f);
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ASSERT_NEAR(window[5], 0.458495038865344f, 1e-6f);
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ASSERT_NEAR(window[6], 0.0f, 1e-6f);
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}
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TEST(WindowGeneratorTest, Hanning) {
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float window[7];
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memset(window, 0, sizeof(window));
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window[0] = -1.0f;
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window[1] = -1.0f;
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WindowGenerator::Hanning(2, window);
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ASSERT_NEAR(window[0], 0.0f, 1e-6f);
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ASSERT_NEAR(window[1], 0.0f, 1e-6f);
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ASSERT_NEAR(window[2], 0.0f, 1e-6f);
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ASSERT_NEAR(window[3], 0.0f, 1e-6f);
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ASSERT_NEAR(window[4], 0.0f, 1e-6f);
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ASSERT_NEAR(window[5], 0.0f, 1e-6f);
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ASSERT_NEAR(window[6], 0.0f, 1e-6f);
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window[0] = -1.0f;
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window[2] = -1.0f;
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WindowGenerator::Hanning(3, window);
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ASSERT_NEAR(window[0], 0.0f, 1e-6f);
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ASSERT_NEAR(window[1], 1.0f, 1e-6f);
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ASSERT_NEAR(window[2], 0.0f, 1e-6f);
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ASSERT_NEAR(window[3], 0.0f, 1e-6f);
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ASSERT_NEAR(window[4], 0.0f, 1e-6f);
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ASSERT_NEAR(window[5], 0.0f, 1e-6f);
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ASSERT_NEAR(window[6], 0.0f, 1e-6f);
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window[0] = -1.0f;
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window[5] = -1.0f;
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WindowGenerator::Hanning(6, window);
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ASSERT_NEAR(window[0], 0.0f, 1e-6f);
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ASSERT_NEAR(window[1], 0.345491f, 1e-6f);
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ASSERT_NEAR(window[2], 0.904508f, 1e-6f);
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ASSERT_NEAR(window[3], 0.904508f, 1e-6f);
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ASSERT_NEAR(window[4], 0.345491f, 1e-6f);
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ASSERT_NEAR(window[5], 0.0f, 1e-6f);
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ASSERT_NEAR(window[6], 0.0f, 1e-6f);
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}
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} // namespace webrtc
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