b5c48b97f6
Ongoing fixes and improvements, transient suppressor is gone. Also, dropping isac because it doesn't seem to be useful, and is just build system deadweight now. Upstream references: Version: 131.0.6778.200 WebRTC: 79aff54b0fa9238ce3518dd9eaf9610cd6f22e82 Chromium: 2a19506ad24af755f2a215a4c61f775393e0db42
82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
/*
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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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#ifndef MODULES_AUDIO_PROCESSING_AGC2_SPEECH_LEVEL_ESTIMATOR_H_
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#define MODULES_AUDIO_PROCESSING_AGC2_SPEECH_LEVEL_ESTIMATOR_H_
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#include <stddef.h>
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#include <type_traits>
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#include "api/audio/audio_processing.h"
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#include "modules/audio_processing/agc2/agc2_common.h"
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namespace webrtc {
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class ApmDataDumper;
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// Active speech level estimator based on the analysis of the following
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// framewise properties: RMS level (dBFS), peak level (dBFS), speech
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// probability.
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class SpeechLevelEstimator {
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public:
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SpeechLevelEstimator(
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ApmDataDumper* apm_data_dumper,
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const AudioProcessing::Config::GainController2::AdaptiveDigital& config,
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int adjacent_speech_frames_threshold);
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SpeechLevelEstimator(const SpeechLevelEstimator&) = delete;
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SpeechLevelEstimator& operator=(const SpeechLevelEstimator&) = delete;
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// Updates the level estimation.
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void Update(float rms_dbfs, float peak_dbfs, float speech_probability);
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// Returns the estimated speech plus noise level.
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float level_dbfs() const { return level_dbfs_; }
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// Returns true if the estimator is confident on its current estimate.
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bool is_confident() const { return is_confident_; }
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void Reset();
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private:
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// Part of the level estimator state used for check-pointing and restore ops.
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struct LevelEstimatorState {
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bool operator==(const LevelEstimatorState& s) const;
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inline bool operator!=(const LevelEstimatorState& s) const {
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return !(*this == s);
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}
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// TODO(bugs.webrtc.org/7494): Remove `time_to_confidence_ms` if redundant.
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int time_to_confidence_ms;
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struct Ratio {
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float numerator;
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float denominator;
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float GetRatio() const;
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} level_dbfs;
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};
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static_assert(std::is_trivially_copyable<LevelEstimatorState>::value, "");
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void UpdateIsConfident();
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void ResetLevelEstimatorState(LevelEstimatorState& state) const;
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void DumpDebugData() const;
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ApmDataDumper* const apm_data_dumper_;
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const float initial_speech_level_dbfs_;
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const int adjacent_speech_frames_threshold_;
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LevelEstimatorState preliminary_state_;
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LevelEstimatorState reliable_state_;
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float level_dbfs_;
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bool is_confident_;
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int num_adjacent_speech_frames_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AGC2_SPEECH_LEVEL_ESTIMATOR_H_
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