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b4161d3c0d
This CL adds support for multichannel in the residual echo estimator code. It also adds placeholder functionality in the surrounding code to ensure that the residual echo estimator receives the require inputs. The changes in the CL has been shown to be bitexact on a large set of mono recordings. Bug: webrtc:10913 Change-Id: I726128ca928648b1dcf36c5f479eb243f3ff3f96 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/155361 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29400}
58 lines
1.9 KiB
C++
58 lines
1.9 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_AEC3_REVERB_MODEL_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_REVERB_MODEL_H_
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#include <array>
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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namespace webrtc {
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// The ReverbModel class describes an exponential reverberant model
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// that can be applied over power spectrums.
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class ReverbModel {
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public:
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ReverbModel();
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~ReverbModel();
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// Resets the state.
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void Reset();
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// Returns the reverb.
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rtc::ArrayView<const float, kFftLengthBy2Plus1> reverb() const {
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return reverb_;
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}
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// The methods UpdateReverbNoFreqShaping and UpdateReverb update the
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// estimate of the reverberation contribution to an input/output power
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// spectrum. Before applying the exponential reverberant model, the input
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// power spectrum is pre-scaled. Use the method UpdateReverb when a different
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// scaling should be applied per frequency and UpdateReverb_no_freq_shape if
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// the same scaling should be used for all the frequencies.
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void UpdateReverbNoFreqShaping(rtc::ArrayView<const float> power_spectrum,
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float power_spectrum_scaling,
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float reverb_decay);
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// Update the reverb based on new data.
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void UpdateReverb(rtc::ArrayView<const float> power_spectrum,
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rtc::ArrayView<const float> power_spectrum_scaling,
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float reverb_decay);
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private:
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std::array<float, kFftLengthBy2Plus1> reverb_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_REVERB_MODEL_H_
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