chromium/third_party/webrtc/modules/audio_processing/rms_level.cc

/*
 *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "modules/audio_processing/rms_level.h"

#include <algorithm>
#include <cmath>
#include <numeric>

#include "rtc_base/checks.h"

namespace webrtc {
namespace {
static constexpr float kMaxSquaredLevel = …;
// kMinLevel is the level corresponding to kMinLevelDb, that is 10^(-127/10).
static constexpr float kMinLevel = …;

// Calculates the normalized RMS value from a mean square value. The input
// should be the sum of squared samples divided by the number of samples. The
// value will be normalized to full range before computing the RMS, wich is
// returned as a negated dBfs. That is, 0 is full amplitude while 127 is very
// faint.
int ComputeRms(float mean_square) { … }
}  // namespace

RmsLevel::RmsLevel() { … }

RmsLevel::~RmsLevel() = default;

void RmsLevel::Reset() { … }

void RmsLevel::Analyze(rtc::ArrayView<const int16_t> data) { … }

void RmsLevel::Analyze(rtc::ArrayView<const float> data) { … }

void RmsLevel::AnalyzeMuted(size_t length) { … }

int RmsLevel::Average() { … }

RmsLevel::Levels RmsLevel::AverageAndPeak() { … }

void RmsLevel::CheckBlockSize(size_t block_size) { … }
}  // namespace webrtc