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52f8188f5d
This reverts commit 6f37ed78d9.
Reason for revert: <INSERT REASONING HERE>
Original change's description:
> Deprecate the adaptive level controller
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> Level control handled by default-on AGC.
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> Bug: none
> Change-Id: I405daeceece12c896d41156b649fcfd556726f77
> Reviewed-on: https://webrtc-review.googlesource.com/59682
> Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
> Reviewed-by: Alex Loiko <aleloi@webrtc.org>
> Commit-Queue: Sam Zackrisson <saza@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#22305}
TBR=solenberg@webrtc.org,saza@webrtc.org,aleloi@webrtc.org
Change-Id: Ic52f41fcbebfd2291a51b17ac788313e1ceef163
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: none
Reviewed-on: https://webrtc-review.googlesource.com/60240
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Commit-Queue: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22308}
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
/*
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* Copyright (c) 2016 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/level_controller/noise_spectrum_estimator.h"
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#include <string.h>
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#include <algorithm>
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#include "api/array_view.h"
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#include "modules/audio_processing/logging/apm_data_dumper.h"
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#include "rtc_base/arraysize.h"
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namespace webrtc {
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namespace {
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constexpr float kMinNoisePower = 100.f;
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} // namespace
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NoiseSpectrumEstimator::NoiseSpectrumEstimator(ApmDataDumper* data_dumper)
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: data_dumper_(data_dumper) {
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Initialize();
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}
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void NoiseSpectrumEstimator::Initialize() {
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std::fill(noise_spectrum_, noise_spectrum_ + arraysize(noise_spectrum_),
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kMinNoisePower);
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}
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void NoiseSpectrumEstimator::Update(rtc::ArrayView<const float> spectrum,
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bool first_update) {
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RTC_DCHECK_EQ(65, spectrum.size());
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if (first_update) {
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// Initialize the noise spectral estimate with the signal spectrum.
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std::copy(spectrum.data(), spectrum.data() + spectrum.size(),
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noise_spectrum_);
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} else {
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// Smoothly update the noise spectral estimate towards the signal spectrum
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// such that the magnitude of the updates are limited.
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for (size_t k = 0; k < spectrum.size(); ++k) {
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if (noise_spectrum_[k] < spectrum[k]) {
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noise_spectrum_[k] = std::min(
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1.01f * noise_spectrum_[k],
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noise_spectrum_[k] + 0.05f * (spectrum[k] - noise_spectrum_[k]));
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} else {
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noise_spectrum_[k] = std::max(
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0.99f * noise_spectrum_[k],
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noise_spectrum_[k] + 0.05f * (spectrum[k] - noise_spectrum_[k]));
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}
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}
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}
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// Ensure that the noise spectal estimate does not become too low.
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for (auto& v : noise_spectrum_) {
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v = std::max(v, kMinNoisePower);
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}
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data_dumper_->DumpRaw("lc_noise_spectrum", 65, noise_spectrum_);
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data_dumper_->DumpRaw("lc_signal_spectrum", spectrum);
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}
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} // namespace webrtc
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