mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-16 15:20:42 +01:00
c329350008
Bug: webrtc:369904700 Change-Id: I698dd126f1627f84abe2633bde215c06aeef6299 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/372400 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43733}
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef API_AUDIO_ECHO_CONTROL_H_
|
|
#define API_AUDIO_ECHO_CONTROL_H_
|
|
|
|
#include <memory>
|
|
|
|
#include "absl/base/nullability.h"
|
|
#include "api/environment/environment.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class AudioBuffer;
|
|
|
|
// Interface for an acoustic echo cancellation (AEC) submodule.
|
|
class EchoControl {
|
|
public:
|
|
// 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 level_change) = 0;
|
|
|
|
// As above, but also returns the linear filter output.
|
|
virtual void ProcessCapture(AudioBuffer* capture,
|
|
AudioBuffer* linear_output,
|
|
bool level_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(int delay_ms) = 0;
|
|
|
|
// Specifies whether the capture output will be used. The purpose of this is
|
|
// to allow the echo controller to deactivate some of the processing when the
|
|
// resulting output is anyway not used, for instance when the endpoint is
|
|
// muted.
|
|
// TODO(b/177830919): Make pure virtual.
|
|
virtual void SetCaptureOutputUsage(bool /* capture_output_used */) {}
|
|
|
|
// Returns wheter the signal is altered.
|
|
virtual bool ActiveProcessing() const = 0;
|
|
|
|
virtual ~EchoControl() {}
|
|
};
|
|
|
|
// Interface for a factory that creates EchoControllers.
|
|
class EchoControlFactory {
|
|
public:
|
|
virtual ~EchoControlFactory() = default;
|
|
|
|
virtual absl::Nonnull<std::unique_ptr<EchoControl>> Create(
|
|
const Environment& env,
|
|
int sample_rate_hz,
|
|
int num_render_channels,
|
|
int num_capture_channels) = 0;
|
|
};
|
|
} // namespace webrtc
|
|
|
|
#endif // API_AUDIO_ECHO_CONTROL_H_
|