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Diffstat (limited to 'webrtc/modules/audio_processing/aec3/subtractor_output_analyzer.cc')
-rw-r--r-- | webrtc/modules/audio_processing/aec3/subtractor_output_analyzer.cc | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/webrtc/modules/audio_processing/aec3/subtractor_output_analyzer.cc b/webrtc/modules/audio_processing/aec3/subtractor_output_analyzer.cc new file mode 100644 index 0000000..8b22185 --- /dev/null +++ b/webrtc/modules/audio_processing/aec3/subtractor_output_analyzer.cc @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2018 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/subtractor_output_analyzer.h" + +#include <algorithm> + +#include "modules/audio_processing/aec3/aec3_common.h" + +namespace webrtc { + +SubtractorOutputAnalyzer::SubtractorOutputAnalyzer(size_t num_capture_channels) + : filters_converged_(num_capture_channels, false) {} + +void SubtractorOutputAnalyzer::Update( + rtc::ArrayView<const SubtractorOutput> subtractor_output, + bool* any_filter_converged, + bool* all_filters_diverged) { + RTC_DCHECK(any_filter_converged); + RTC_DCHECK(all_filters_diverged); + RTC_DCHECK_EQ(subtractor_output.size(), filters_converged_.size()); + + *any_filter_converged = false; + *all_filters_diverged = true; + + for (size_t ch = 0; ch < subtractor_output.size(); ++ch) { + const float y2 = subtractor_output[ch].y2; + const float e2_refined = subtractor_output[ch].e2_refined; + const float e2_coarse = subtractor_output[ch].e2_coarse; + + constexpr float kConvergenceThreshold = 50 * 50 * kBlockSize; + bool refined_filter_converged = + e2_refined < 0.5f * y2 && y2 > kConvergenceThreshold; + bool coarse_filter_converged = + e2_coarse < 0.05f * y2 && y2 > kConvergenceThreshold; + float min_e2 = std::min(e2_refined, e2_coarse); + bool filter_diverged = min_e2 > 1.5f * y2 && y2 > 30.f * 30.f * kBlockSize; + filters_converged_[ch] = + refined_filter_converged || coarse_filter_converged; + + *any_filter_converged = *any_filter_converged || filters_converged_[ch]; + *all_filters_diverged = *all_filters_diverged && filter_diverged; + } +} + +void SubtractorOutputAnalyzer::HandleEchoPathChange() { + std::fill(filters_converged_.begin(), filters_converged_.end(), false); +} + +} // namespace webrtc |