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| 1 /* |
| 2 * Copyright (c) 2017 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/modules/audio_processing/aec3/erle_estimator.h" |
| 12 #include "webrtc/test/gtest.h" |
| 13 |
| 14 namespace webrtc { |
| 15 |
| 16 namespace { |
| 17 |
| 18 void VerifyErle(const std::array<float, kFftLengthBy2Plus1>& erle, |
| 19 float reference) { |
| 20 std::for_each(erle.begin(), erle.end(), |
| 21 [reference](float a) { EXPECT_NEAR(reference, a, 0.001); }); |
| 22 } |
| 23 |
| 24 } // namespace |
| 25 |
| 26 // Verifies that the correct ERLE estimates are achieved. |
| 27 TEST(ErleEstimator, Estimates) { |
| 28 std::array<float, kFftLengthBy2Plus1> X2; |
| 29 std::array<float, kFftLengthBy2Plus1> E2; |
| 30 std::array<float, kFftLengthBy2Plus1> Y2; |
| 31 |
| 32 ErleEstimator estimator; |
| 33 |
| 34 // Verifies that the ERLE estimate is properley increased to higher values. |
| 35 X2.fill(500 * 1000.f * 1000.f); |
| 36 E2.fill(1000.f * 1000.f); |
| 37 Y2.fill(10 * E2[0]); |
| 38 for (size_t k = 0; k < 200; ++k) { |
| 39 estimator.Update(X2, Y2, E2); |
| 40 } |
| 41 VerifyErle(estimator.Erle(), 8.f); |
| 42 |
| 43 // Verifies that the ERLE is not immediately decreased when the ERLE in the |
| 44 // data decreases. |
| 45 Y2.fill(0.1f * E2[0]); |
| 46 for (size_t k = 0; k < 98; ++k) { |
| 47 estimator.Update(X2, Y2, E2); |
| 48 } |
| 49 VerifyErle(estimator.Erle(), 8.f); |
| 50 |
| 51 // Verifies that the minimum ERLE is eventually achieved. |
| 52 for (size_t k = 0; k < 1000; ++k) { |
| 53 estimator.Update(X2, Y2, E2); |
| 54 } |
| 55 VerifyErle(estimator.Erle(), 1.f); |
| 56 |
| 57 // Verifies that the ERLE estimate is is not updated for low-level render |
| 58 // signals. |
| 59 X2.fill(1000.f * 1000.f); |
| 60 Y2.fill(10 * E2[0]); |
| 61 for (size_t k = 0; k < 200; ++k) { |
| 62 estimator.Update(X2, Y2, E2); |
| 63 } |
| 64 VerifyErle(estimator.Erle(), 1.f); |
| 65 } |
| 66 } // namespace webrtc |
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