blob: f549f40fbb05ac8f636a5eed664c80dd59d9a844 [file] [log] [blame]
* Copyright (c) 2018 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 <memory>
namespace webrtc {
class AudioBuffer;
// Interface for an acoustic echo cancellation (AEC) submodule.
class EchoControl {
// Analysis (not changing) of the render signal.
virtual void AnalyzeRender(AudioBuffer* render) = 0;
// Analysis (not changing) of the capture signal.
virtual void AnalyzeCapture(AudioBuffer* capture) = 0;
// Processes the capture signal in order to remove the echo.
virtual void ProcessCapture(AudioBuffer* capture, bool echo_path_change) = 0;
struct Metrics {
double echo_return_loss;
double echo_return_loss_enhancement;
int delay_ms;
// Collect current metrics from the echo controller.
virtual Metrics GetMetrics() const = 0;
// Provides an optional external estimate of the audio buffer delay.
virtual void SetAudioBufferDelay(size_t delay_ms) = 0;
virtual ~EchoControl() {}
// Interface for a factory that creates EchoControllers.
class EchoControlFactory {
virtual std::unique_ptr<EchoControl> Create(int sample_rate_hz) = 0;
virtual ~EchoControlFactory() = default;
} // namespace webrtc