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a4d873786f
This CL was generated by running git ls-files | grep -P "(\.h|\.cc)$" | grep -v 'sdk/' | grep -v 'rtc_base/ssl_' | \ grep -v 'fake_rtc_certificate_generator.h' | grep -v 'modules/audio_device/win/' | \ grep -v 'system_wrappers/source/clock.cc' | grep -v 'rtc_base/trace_event.h' | \ grep -v 'modules/audio_coding/codecs/ilbc/' | grep -v 'screen_capturer_mac.h' | \ grep -v 'spl_inl_mips.h' | grep -v 'data_size_unittest.cc' | grep -v 'timestamp_unittest.cc' \ | xargs clang-format -i ; git cl format Most of these changes are clang-format grouping and reordering includes differently. Bug: webrtc:9340 Change-Id: Ic83ddbc169bfacd21883e381b5181c3dd4fe8a63 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/144051 Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28505}
70 lines
2.2 KiB
C++
70 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/agc2/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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#include "rtc_base/checks.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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