1d68089f4b
This CL increases the transparency of the AEC3 via tuning. The major changes are 1) Limiting the suppression gain to the 16 bit sample floor. 2) Controlling the rate of the suppression gain increase according to the signal characteristics. Apart from these tunings, the code for the suppression gain was refactored to increase/maintain the code quality after the above changes. BUG=webrtc:7519,webrtc:7528, chromium:715893 Review-Url: https://codereview.webrtc.org/2886733002 Cr-Commit-Position: refs/heads/master@{#18229}
90 lines
3.1 KiB
C++
90 lines
3.1 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 "webrtc/modules/audio_processing/aec3/suppression_gain.h"
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#include "webrtc/base/checks.h"
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#include "webrtc/system_wrappers/include/cpu_features_wrapper.h"
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#include "webrtc/test/gtest.h"
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#include "webrtc/typedefs.h"
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namespace webrtc {
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namespace aec3 {
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#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
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// Verifies that the check for non-null output gains works.
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TEST(SuppressionGain, NullOutputGains) {
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std::array<float, kFftLengthBy2Plus1> E2;
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std::array<float, kFftLengthBy2Plus1> R2;
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std::array<float, kFftLengthBy2Plus1> N2;
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E2.fill(0.f);
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R2.fill(0.f);
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N2.fill(0.f);
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float high_bands_gain;
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EXPECT_DEATH(SuppressionGain(DetectOptimization())
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.GetGain(E2, R2, N2, false,
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std::vector<std::vector<float>>(
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3, std::vector<float>(kBlockSize, 0.f)),
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false, &high_bands_gain, nullptr),
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"");
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}
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#endif
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// Does a sanity check that the gains are correctly computed.
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TEST(SuppressionGain, BasicGainComputation) {
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SuppressionGain suppression_gain(DetectOptimization());
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float high_bands_gain;
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std::array<float, kFftLengthBy2Plus1> E2;
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std::array<float, kFftLengthBy2Plus1> R2;
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std::array<float, kFftLengthBy2Plus1> N2;
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std::array<float, kFftLengthBy2Plus1> g;
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std::vector<std::vector<float>> x(1, std::vector<float>(kBlockSize, 0.f));
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// Ensure that a strong noise is detected to mask any echoes.
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E2.fill(10.f);
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R2.fill(0.1f);
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N2.fill(100.f);
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for (int k = 0; k < 10; ++k) {
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suppression_gain.GetGain(E2, R2, N2, false, x, false, &high_bands_gain, &g);
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}
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std::for_each(g.begin(), g.end(),
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[](float a) { EXPECT_NEAR(1.f, a, 0.001); });
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// Ensure that a strong nearend is detected to mask any echoes.
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E2.fill(100.f);
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R2.fill(0.1f);
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N2.fill(0.f);
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for (int k = 0; k < 10; ++k) {
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suppression_gain.GetGain(E2, R2, N2, false, x, false, &high_bands_gain, &g);
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}
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std::for_each(g.begin(), g.end(),
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[](float a) { EXPECT_NEAR(1.f, a, 0.001); });
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// Ensure that a strong echo is suppressed.
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E2.fill(1000000000.f);
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R2.fill(10000000000000.f);
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N2.fill(0.f);
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for (int k = 0; k < 10; ++k) {
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suppression_gain.GetGain(E2, R2, N2, false, x, false, &high_bands_gain, &g);
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}
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std::for_each(g.begin(), g.end(),
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[](float a) { EXPECT_NEAR(0.f, a, 0.001); });
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// Verify the functionality for forcing a zero gain.
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suppression_gain.GetGain(E2, R2, N2, false, x, true, &high_bands_gain, &g);
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std::for_each(g.begin(), g.end(), [](float a) { EXPECT_FLOAT_EQ(0.f, a); });
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EXPECT_FLOAT_EQ(0.f, high_bands_gain);
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}
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} // namespace aec3
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} // namespace webrtc
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