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92ea95e34a
In https://webrtc-review.googlesource.com/c/src/+/1560 we moved WebRTC from src/webrtc to src/ (in order to preserve an healthy git history). This CL takes care of fixing header guards, #include paths, etc... NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iea91618212bee0af16aa3f05071eab8f93706578 Reviewed-on: https://webrtc-review.googlesource.com/1561 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19846}
74 lines
2.3 KiB
C++
74 lines
2.3 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/peak_level_estimator.h"
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#include <algorithm>
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#include "modules/audio_processing/audio_buffer.h"
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#include "modules/audio_processing/logging/apm_data_dumper.h"
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namespace webrtc {
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namespace {
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constexpr float kMinLevel = 30.f;
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} // namespace
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PeakLevelEstimator::PeakLevelEstimator(float initial_peak_level_dbfs) {
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Initialize(initial_peak_level_dbfs);
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}
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PeakLevelEstimator::~PeakLevelEstimator() {}
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void PeakLevelEstimator::Initialize(float initial_peak_level_dbfs) {
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RTC_DCHECK_LE(-100.f, initial_peak_level_dbfs);
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RTC_DCHECK_GE(0.f, initial_peak_level_dbfs);
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peak_level_ = std::pow(10.f, initial_peak_level_dbfs / 20.f) * 32768.f;
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peak_level_ = std::max(peak_level_, kMinLevel);
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hold_counter_ = 0;
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initialization_phase_ = true;
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}
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float PeakLevelEstimator::Analyze(SignalClassifier::SignalType signal_type,
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float frame_peak_level) {
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if (frame_peak_level == 0) {
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RTC_DCHECK_LE(kMinLevel, peak_level_);
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return peak_level_;
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}
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if (peak_level_ < frame_peak_level) {
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// Smoothly update the estimate upwards when the frame peak level is
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// higher than the estimate.
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peak_level_ += 0.1f * (frame_peak_level - peak_level_);
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hold_counter_ = 100;
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initialization_phase_ = false;
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} else {
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hold_counter_ = std::max(0, hold_counter_ - 1);
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// When the signal is highly non-stationary, update the estimate slowly
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// downwards if the estimate is lower than the frame peak level.
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if ((signal_type == SignalClassifier::SignalType::kHighlyNonStationary &&
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hold_counter_ == 0) ||
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initialization_phase_) {
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peak_level_ =
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std::max(peak_level_ + 0.01f * (frame_peak_level - peak_level_),
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peak_level_ * 0.995f);
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}
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}
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peak_level_ = std::max(peak_level_, kMinLevel);
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return peak_level_;
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}
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} // namespace webrtc
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