65 lines
2.5 KiB
C++
65 lines
2.5 KiB
C++
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/*
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* Copyright (c) 2018 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/subtractor_output_analyzer.h"
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#include <algorithm>
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#include "modules/audio_processing/aec3/aec3_common.h"
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namespace webrtc {
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SubtractorOutputAnalyzer::SubtractorOutputAnalyzer(size_t num_capture_channels)
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: filters_converged_(num_capture_channels, false) {}
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void SubtractorOutputAnalyzer::Update(
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rtc::ArrayView<const SubtractorOutput> subtractor_output,
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bool* any_filter_converged,
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bool* any_coarse_filter_converged,
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bool* all_filters_diverged) {
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RTC_DCHECK(any_filter_converged);
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RTC_DCHECK(all_filters_diverged);
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RTC_DCHECK_EQ(subtractor_output.size(), filters_converged_.size());
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*any_filter_converged = false;
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*any_coarse_filter_converged = false;
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*all_filters_diverged = true;
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for (size_t ch = 0; ch < subtractor_output.size(); ++ch) {
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const float y2 = subtractor_output[ch].y2;
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const float e2_refined = subtractor_output[ch].e2_refined;
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const float e2_coarse = subtractor_output[ch].e2_coarse;
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constexpr float kConvergenceThreshold = 50 * 50 * kBlockSize;
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constexpr float kConvergenceThresholdLowLevel = 20 * 20 * kBlockSize;
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bool refined_filter_converged =
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e2_refined < 0.5f * y2 && y2 > kConvergenceThreshold;
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bool coarse_filter_converged_strict =
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e2_coarse < 0.05f * y2 && y2 > kConvergenceThreshold;
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bool coarse_filter_converged_relaxed =
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e2_coarse < 0.3f * y2 && y2 > kConvergenceThresholdLowLevel;
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float min_e2 = std::min(e2_refined, e2_coarse);
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bool filter_diverged = min_e2 > 1.5f * y2 && y2 > 30.f * 30.f * kBlockSize;
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filters_converged_[ch] =
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refined_filter_converged || coarse_filter_converged_strict;
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*any_filter_converged = *any_filter_converged || filters_converged_[ch];
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*any_coarse_filter_converged =
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*any_coarse_filter_converged || coarse_filter_converged_relaxed;
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*all_filters_diverged = *all_filters_diverged && filter_diverged;
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}
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}
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void SubtractorOutputAnalyzer::HandleEchoPathChange() {
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std::fill(filters_converged_.begin(), filters_converged_.end(), false);
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}
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} // namespace webrtc
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