63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
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/*
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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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#ifndef MODULES_AUDIO_PROCESSING_AEC3_RENDER_SIGNAL_ANALYZER_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_RENDER_SIGNAL_ANALYZER_H_
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#include <algorithm>
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#include <array>
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#include <cstddef>
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#include "absl/types/optional.h"
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#include "api/audio/echo_canceller3_config.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "modules/audio_processing/aec3/render_buffer.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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// Provides functionality for analyzing the properties of the render signal.
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class RenderSignalAnalyzer {
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public:
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explicit RenderSignalAnalyzer(const EchoCanceller3Config& config);
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~RenderSignalAnalyzer();
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RenderSignalAnalyzer(const RenderSignalAnalyzer&) = delete;
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RenderSignalAnalyzer& operator=(const RenderSignalAnalyzer&) = delete;
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// Updates the render signal analysis with the most recent render signal.
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void Update(const RenderBuffer& render_buffer,
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const absl::optional<size_t>& delay_partitions);
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// Returns true if the render signal is poorly exciting.
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bool PoorSignalExcitation() const {
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RTC_DCHECK_LT(2, narrow_band_counters_.size());
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return std::any_of(narrow_band_counters_.begin(),
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narrow_band_counters_.end(),
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[](size_t a) { return a > 10; });
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}
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// Zeros the array around regions with narrow bands signal characteristics.
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void MaskRegionsAroundNarrowBands(
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std::array<float, kFftLengthBy2Plus1>* v) const;
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absl::optional<int> NarrowPeakBand() const { return narrow_peak_band_; }
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private:
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const int strong_peak_freeze_duration_;
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std::array<size_t, kFftLengthBy2 - 1> narrow_band_counters_;
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absl::optional<int> narrow_peak_band_;
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size_t narrow_peak_counter_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_RENDER_SIGNAL_ANALYZER_H_
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