blob: ca812a5e44da0b7e1e7090e253d779257525cdbd [file] [log] [blame]
/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/audio_processing/aec3/erle_estimator.h"
#include "api/array_view.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
constexpr int kLowFrequencyLimit = kFftLengthBy2 / 2;
constexpr float kMaxErleLf = 8.f;
constexpr float kMaxErleHf = 1.5f;
constexpr float kMinErle = 1.0f;
constexpr float kTrueErle = 10.f;
constexpr float kTrueErleOnsets = 1.0f;
void VerifyErleBands(rtc::ArrayView<const float> erle,
float reference_lf,
float reference_hf) {
std::for_each(
erle.begin(), erle.begin() + kLowFrequencyLimit,
[reference_lf](float a) { EXPECT_NEAR(reference_lf, a, 0.001); });
std::for_each(
erle.begin() + kLowFrequencyLimit, erle.end(),
[reference_hf](float a) { EXPECT_NEAR(reference_hf, a, 0.001); });
}
void VerifyErle(rtc::ArrayView<const float> erle,
float erle_time_domain,
float reference_lf,
float reference_hf) {
VerifyErleBands(erle, reference_lf, reference_hf);
EXPECT_NEAR(reference_lf, erle_time_domain, 0.001);
}
void FormFarendFrame(std::array<float, kFftLengthBy2Plus1>* X2,
std::array<float, kFftLengthBy2Plus1>* E2,
std::array<float, kFftLengthBy2Plus1>* Y2,
float erle) {
X2->fill(500 * 1000.f * 1000.f);
E2->fill(1000.f * 1000.f);
Y2->fill(erle * (*E2)[0]);
}
void FormNearendFrame(std::array<float, kFftLengthBy2Plus1>* X2,
std::array<float, kFftLengthBy2Plus1>* E2,
std::array<float, kFftLengthBy2Plus1>* Y2) {
X2->fill(0.f);
Y2->fill(500.f * 1000.f * 1000.f);
E2->fill((*Y2)[0]);
}
} // namespace
TEST(ErleEstimator, VerifyErleIncreaseAndHold) {
std::array<float, kFftLengthBy2Plus1> X2;
std::array<float, kFftLengthBy2Plus1> E2;
std::array<float, kFftLengthBy2Plus1> Y2;
ErleEstimator estimator(kMinErle, kMaxErleLf, kMaxErleHf);
// Verifies that the ERLE estimate is properly increased to higher values.
FormFarendFrame(&X2, &E2, &Y2, kTrueErle);
for (size_t k = 0; k < 200; ++k) {
estimator.Update(X2, Y2, E2, true);
}
VerifyErle(estimator.Erle(), estimator.ErleTimeDomain(), 8.f, 1.5f);
FormNearendFrame(&X2, &E2, &Y2);
// Verifies that the ERLE is not immediately decreased during nearend
// activity.
for (size_t k = 0; k < 50; ++k) {
estimator.Update(X2, Y2, E2, true);
}
VerifyErle(estimator.Erle(), estimator.ErleTimeDomain(), 8.f, 1.5f);
}
TEST(ErleEstimator, VerifyErleTrackingOnOnsets) {
std::array<float, kFftLengthBy2Plus1> X2;
std::array<float, kFftLengthBy2Plus1> E2;
std::array<float, kFftLengthBy2Plus1> Y2;
ErleEstimator estimator(kMinErle, kMaxErleLf, kMaxErleHf);
for (size_t burst = 0; burst < 20; ++burst) {
FormFarendFrame(&X2, &E2, &Y2, kTrueErleOnsets);
for (size_t k = 0; k < 10; ++k) {
estimator.Update(X2, Y2, E2, true);
}
FormFarendFrame(&X2, &E2, &Y2, kTrueErle);
for (size_t k = 0; k < 200; ++k) {
estimator.Update(X2, Y2, E2, true);
}
FormNearendFrame(&X2, &E2, &Y2);
for (size_t k = 0; k < 300; ++k) {
estimator.Update(X2, Y2, E2, true);
}
}
VerifyErleBands(estimator.ErleOnsets(), kMinErle, kMinErle);
FormNearendFrame(&X2, &E2, &Y2);
for (size_t k = 0; k < 1000; k++) {
estimator.Update(X2, Y2, E2, true);
}
// Verifies that during ne activity, Erle converges to the Erle for onsets.
VerifyErle(estimator.Erle(), estimator.ErleTimeDomain(), kMinErle, kMinErle);
}
TEST(ErleEstimator, VerifyNoErleUpdateDuringLowActivity) {
std::array<float, kFftLengthBy2Plus1> X2;
std::array<float, kFftLengthBy2Plus1> E2;
std::array<float, kFftLengthBy2Plus1> Y2;
ErleEstimator estimator(kMinErle, kMaxErleLf, kMaxErleHf);
// Verifies that the ERLE estimate is is not updated for low-level render
// signals.
X2.fill(1000.f * 1000.f);
Y2.fill(10 * E2[0]);
for (size_t k = 0; k < 200; ++k) {
estimator.Update(X2, Y2, E2, true);
}
VerifyErle(estimator.Erle(), estimator.ErleTimeDomain(), kMinErle, kMinErle);
}
} // namespace webrtc