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webrtc / src / 81125f0abacb5b1c2a2c4606caf8682309d6e58f / . / common_audio / window_generator_unittest.cc
blob: cf339327c6af9325ca4a3d1a7fc0f94a7a5c4a7a [file] [log] [blame]
andrew@webrtc.org325cff02014-10-01 17:42:18[diff] [blame]1/*
2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
Mirko Bonadei92ea95e2017-09-15 04:47:31[diff] [blame]11#include "common_audio/window_generator.h"
andrew@webrtc.org325cff02014-10-01 17:42:18[diff] [blame]12
13#include <cstring>
14
Mirko Bonadei92ea95e2017-09-15 04:47:31[diff] [blame]15#include "test/gtest.h"
andrew@webrtc.org325cff02014-10-01 17:42:18[diff] [blame]16
17namespace webrtc {
18
19TEST(WindowGeneratorTest, KaiserBesselDerived) {
20 float window[7];
21
22 memset(window, 0, sizeof(window));
23
24 WindowGenerator::KaiserBesselDerived(0.397856f, 2, window);
25 ASSERT_NEAR(window[0], 0.707106f, 1e-6f);
26 ASSERT_NEAR(window[1], 0.707106f, 1e-6f);
27 ASSERT_NEAR(window[2], 0.0f, 1e-6f);
28 ASSERT_NEAR(window[3], 0.0f, 1e-6f);
29 ASSERT_NEAR(window[4], 0.0f, 1e-6f);
30 ASSERT_NEAR(window[5], 0.0f, 1e-6f);
31 ASSERT_NEAR(window[6], 0.0f, 1e-6f);
32
33 WindowGenerator::KaiserBesselDerived(0.397856f, 3, window);
34 ASSERT_NEAR(window[0], 0.598066f, 1e-6f);
35 ASSERT_NEAR(window[1], 0.922358f, 1e-6f);
36 ASSERT_NEAR(window[2], 0.598066f, 1e-6f);
37 ASSERT_NEAR(window[3], 0.0f, 1e-6f);
38 ASSERT_NEAR(window[4], 0.0f, 1e-6f);
39 ASSERT_NEAR(window[5], 0.0f, 1e-6f);
40 ASSERT_NEAR(window[6], 0.0f, 1e-6f);
41
42 WindowGenerator::KaiserBesselDerived(0.397856f, 6, window);
43 ASSERT_NEAR(window[0], 0.458495038865344f, 1e-6f);
44 ASSERT_NEAR(window[1], 0.707106781186548f, 1e-6f);
45 ASSERT_NEAR(window[2], 0.888696967101760f, 1e-6f);
46 ASSERT_NEAR(window[3], 0.888696967101760f, 1e-6f);
47 ASSERT_NEAR(window[4], 0.707106781186548f, 1e-6f);
48 ASSERT_NEAR(window[5], 0.458495038865344f, 1e-6f);
49 ASSERT_NEAR(window[6], 0.0f, 1e-6f);
50}
51
52TEST(WindowGeneratorTest, Hanning) {
53 float window[7];
54
55 memset(window, 0, sizeof(window));
56
57 window[0] = -1.0f;
58 window[1] = -1.0f;
59 WindowGenerator::Hanning(2, window);
60 ASSERT_NEAR(window[0], 0.0f, 1e-6f);
61 ASSERT_NEAR(window[1], 0.0f, 1e-6f);
62 ASSERT_NEAR(window[2], 0.0f, 1e-6f);
63 ASSERT_NEAR(window[3], 0.0f, 1e-6f);
64 ASSERT_NEAR(window[4], 0.0f, 1e-6f);
65 ASSERT_NEAR(window[5], 0.0f, 1e-6f);
66 ASSERT_NEAR(window[6], 0.0f, 1e-6f);
67
68 window[0] = -1.0f;
69 window[2] = -1.0f;
70 WindowGenerator::Hanning(3, window);
71 ASSERT_NEAR(window[0], 0.0f, 1e-6f);
72 ASSERT_NEAR(window[1], 1.0f, 1e-6f);
73 ASSERT_NEAR(window[2], 0.0f, 1e-6f);
74 ASSERT_NEAR(window[3], 0.0f, 1e-6f);
75 ASSERT_NEAR(window[4], 0.0f, 1e-6f);
76 ASSERT_NEAR(window[5], 0.0f, 1e-6f);
77 ASSERT_NEAR(window[6], 0.0f, 1e-6f);
78
79 window[0] = -1.0f;
80 window[5] = -1.0f;
81 WindowGenerator::Hanning(6, window);
82 ASSERT_NEAR(window[0], 0.0f, 1e-6f);
83 ASSERT_NEAR(window[1], 0.345491f, 1e-6f);
84 ASSERT_NEAR(window[2], 0.904508f, 1e-6f);
85 ASSERT_NEAR(window[3], 0.904508f, 1e-6f);
86 ASSERT_NEAR(window[4], 0.345491f, 1e-6f);
87 ASSERT_NEAR(window[5], 0.0f, 1e-6f);
88 ASSERT_NEAR(window[6], 0.0f, 1e-6f);
89}
90
91} // namespace webrtc