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fe4d673393
Bug: webrtc:8533 Change-Id: I7160361b3468bb24cef9e6d390f10b23b988edd3 Reviewed-on: https://webrtc-review.googlesource.com/23242 Reviewed-by: Per Åhgren <peah@webrtc.org> Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20713}
72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/*
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* Copyright (c) 2017 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 "modules/audio_processing/aec3/erl_estimator.h"
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#include "test/gtest.h"
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namespace webrtc {
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namespace {
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void VerifyErl(const std::array<float, kFftLengthBy2Plus1>& erl,
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float erl_time_domain,
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float reference) {
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std::for_each(erl.begin(), erl.end(),
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[reference](float a) { EXPECT_NEAR(reference, a, 0.001); });
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EXPECT_NEAR(reference, erl_time_domain, 0.001);
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}
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} // namespace
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// Verifies that the correct ERL estimates are achieved.
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TEST(ErlEstimator, Estimates) {
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std::array<float, kFftLengthBy2Plus1> X2;
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std::array<float, kFftLengthBy2Plus1> Y2;
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ErlEstimator estimator;
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// Verifies that the ERL estimate is properly reduced to lower values.
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X2.fill(500 * 1000.f * 1000.f);
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Y2.fill(10 * X2[0]);
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for (size_t k = 0; k < 200; ++k) {
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estimator.Update(X2, Y2);
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}
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VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 10.f);
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// Verifies that the ERL is not immediately increased when the ERL in the data
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// increases.
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Y2.fill(10000 * X2[0]);
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for (size_t k = 0; k < 998; ++k) {
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estimator.Update(X2, Y2);
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}
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VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 10.f);
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// Verifies that the rate of increase is 3 dB.
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estimator.Update(X2, Y2);
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VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 20.f);
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// Verifies that the maximum ERL is achieved when there are no low RLE
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// estimates.
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for (size_t k = 0; k < 1000; ++k) {
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estimator.Update(X2, Y2);
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}
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VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 1000.f);
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// Verifies that the ERL estimate is is not updated for low-level signals
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X2.fill(1000.f * 1000.f);
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Y2.fill(10 * X2[0]);
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for (size_t k = 0; k < 200; ++k) {
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estimator.Update(X2, Y2);
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}
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VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 1000.f);
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}
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} // namespace webrtc
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