c20978e581
NOPRESUBMIT=True # cpplint errors that aren't caused by this CL. NOTRY=True NOTREECHECKS=True TBR=kwiberg@webrtc.org, kjellander@webrtc.org Bug: webrtc:7634 Change-Id: I3cca0fbaa807b563c95979cccd6d1bec32055f36 Reviewed-on: https://chromium-review.googlesource.com/562156 Commit-Queue: Edward Lemur <ehmaldonado@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#18919}
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
/*
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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 WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_ERL_ESTIMATOR_H_
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#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_ERL_ESTIMATOR_H_
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#include <array>
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#include "webrtc/modules/audio_processing/aec3/aec3_common.h"
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#include "webrtc/rtc_base/constructormagic.h"
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namespace webrtc {
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// Estimates the echo return loss based on the signal spectra.
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class ErlEstimator {
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public:
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ErlEstimator();
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~ErlEstimator();
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// Updates the ERL estimate.
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void Update(const std::array<float, kFftLengthBy2Plus1>& render_spectrum,
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const std::array<float, kFftLengthBy2Plus1>& capture_spectrum);
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// Returns the most recent ERL estimate.
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const std::array<float, kFftLengthBy2Plus1>& Erl() const { return erl_; }
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private:
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std::array<float, kFftLengthBy2Plus1> erl_;
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std::array<int, kFftLengthBy2Minus1> hold_counters_;
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RTC_DISALLOW_COPY_AND_ASSIGN(ErlEstimator);
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_ERL_ESTIMATOR_H_
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