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d0fa820559
This CL adds support for using any externally reported audio buffer delay to set the initial alignment in AEC3 which is used before the AEC has been able to detect the delay. Bug: chromium:834182,webrtc:9163 Change-Id: Ic71355f69b7c4d5815b78e49987043441e7908fb Reviewed-on: https://webrtc-review.googlesource.com/70580 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22917}
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
/*
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* Copyright (c) 2018 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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#ifndef API_AUDIO_ECHO_CONTROL_H_
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#define API_AUDIO_ECHO_CONTROL_H_
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#include <memory>
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namespace webrtc {
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class AudioBuffer;
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// Interface for an acoustic echo cancellation (AEC) submodule.
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class EchoControl {
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public:
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// Analysis (not changing) of the render signal.
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virtual void AnalyzeRender(AudioBuffer* render) = 0;
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// Analysis (not changing) of the capture signal.
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virtual void AnalyzeCapture(AudioBuffer* capture) = 0;
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// Processes the capture signal in order to remove the echo.
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virtual void ProcessCapture(AudioBuffer* capture, bool echo_path_change) = 0;
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struct Metrics {
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double echo_return_loss;
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double echo_return_loss_enhancement;
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int delay_ms;
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};
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// Collect current metrics from the echo controller.
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virtual Metrics GetMetrics() const = 0;
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// Provides an optional external estimate of the audio buffer delay.
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virtual void SetAudioBufferDelay(size_t delay_ms) = 0;
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virtual ~EchoControl() {}
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};
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// Interface for a factory that creates EchoControllers.
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class EchoControlFactory {
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public:
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virtual std::unique_ptr<EchoControl> Create(int sample_rate_hz) = 0;
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virtual ~EchoControlFactory() = default;
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};
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} // namespace webrtc
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#endif // API_AUDIO_ECHO_CONTROL_H_
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