53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2019 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef MODULES_AUDIO_PROCESSING_AEC3_SUBBAND_NEAREND_DETECTOR_H_
|
||
|
|
#define MODULES_AUDIO_PROCESSING_AEC3_SUBBAND_NEAREND_DETECTOR_H_
|
||
|
|
|
||
|
|
#include <vector>
|
||
|
|
|
||
|
|
#include "api/array_view.h"
|
||
|
|
#include "api/audio/echo_canceller3_config.h"
|
||
|
|
#include "modules/audio_processing/aec3/moving_average.h"
|
||
|
|
#include "modules/audio_processing/aec3/nearend_detector.h"
|
||
|
|
|
||
|
|
namespace webrtc {
|
||
|
|
// Class for selecting whether the suppressor is in the nearend or echo state.
|
||
|
|
class SubbandNearendDetector : public NearendDetector {
|
||
|
|
public:
|
||
|
|
SubbandNearendDetector(
|
||
|
|
const EchoCanceller3Config::Suppressor::SubbandNearendDetection& config,
|
||
|
|
size_t num_capture_channels);
|
||
|
|
|
||
|
|
// Returns whether the current state is the nearend state.
|
||
|
|
bool IsNearendState() const override { return nearend_state_; }
|
||
|
|
|
||
|
|
// Updates the state selection based on latest spectral estimates.
|
||
|
|
void Update(rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
|
||
|
|
nearend_spectrum,
|
||
|
|
rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
|
||
|
|
residual_echo_spectrum,
|
||
|
|
rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
|
||
|
|
comfort_noise_spectrum,
|
||
|
|
bool initial_state) override;
|
||
|
|
|
||
|
|
private:
|
||
|
|
const EchoCanceller3Config::Suppressor::SubbandNearendDetection config_;
|
||
|
|
const size_t num_capture_channels_;
|
||
|
|
std::vector<aec3::MovingAverage> nearend_smoothers_;
|
||
|
|
const float one_over_subband_length1_;
|
||
|
|
const float one_over_subband_length2_;
|
||
|
|
bool nearend_state_ = false;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace webrtc
|
||
|
|
|
||
|
|
#endif // MODULES_AUDIO_PROCESSING_AEC3_SUBBAND_NEAREND_DETECTOR_H_
|