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

/*
 *  Copyright (c) 2016 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/residual_echo_detector.h"

#include <algorithm>
#include <numeric>

#include "absl/types/optional.h"
#include "modules/audio_processing/logging/apm_data_dumper.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "system_wrappers/include/metrics.h"

namespace {

float Power(rtc::ArrayView<const float> input) { … }

constexpr size_t kLookbackFrames = …;
// TODO(ivoc): Verify the size of this buffer.
constexpr size_t kRenderBufferSize = …;
constexpr float kAlpha = …;
// 10 seconds of data, updated every 10 ms.
constexpr size_t kAggregationBufferSize = …;

}  // namespace

namespace webrtc {

std::atomic<int> ResidualEchoDetector::instance_count_(0);

ResidualEchoDetector::ResidualEchoDetector()
    : … { … }

ResidualEchoDetector::~ResidualEchoDetector() = default;

void ResidualEchoDetector::AnalyzeRenderAudio(
    rtc::ArrayView<const float> render_audio) { … }

void ResidualEchoDetector::AnalyzeCaptureAudio(
    rtc::ArrayView<const float> capture_audio) { … }

void ResidualEchoDetector::Initialize(int /*capture_sample_rate_hz*/,
                                      int /*num_capture_channels*/,
                                      int /*render_sample_rate_hz*/,
                                      int /*num_render_channels*/) { … }

EchoDetector::Metrics ResidualEchoDetector::GetMetrics() const { … }
}  // namespace webrtc