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 11 #include "webrtc/common_audio/window_generator.h" 12 13 #include <cstring> 14 15 #include "testing/gtest/include/gtest/gtest.h" 16 17 namespace webrtc { 18 19 TEST(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 52 TEST(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 92 93
