bcec8b0b21
This is from the upstream library commit id 3326535126e435f1ba647885ce43a8f0f3d317eb, corresponding to Chromium 88.0.4290.1.
53 lines
1.3 KiB
C++
53 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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#include "modules/audio_processing/echo_detector/moving_max.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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namespace {
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// Parameter for controlling how fast the estimated maximum decays after the
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// previous maximum is no longer valid. With a value of 0.99, the maximum will
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// decay to 1% of its former value after 460 updates.
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constexpr float kDecayFactor = 0.99f;
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} // namespace
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MovingMax::MovingMax(size_t window_size) : window_size_(window_size) {
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RTC_DCHECK_GT(window_size, 0);
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}
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MovingMax::~MovingMax() {}
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void MovingMax::Update(float value) {
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if (counter_ >= window_size_ - 1) {
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max_value_ *= kDecayFactor;
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} else {
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++counter_;
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}
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if (value > max_value_) {
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max_value_ = value;
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counter_ = 0;
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}
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}
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float MovingMax::max() const {
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return max_value_;
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}
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void MovingMax::Clear() {
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max_value_ = 0.f;
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counter_ = 0;
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}
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} // namespace webrtc
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