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// Copyright 2022 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_BASE_AUDIO_PROCESSOR_CONTROLS_H_
#define MEDIA_BASE_AUDIO_PROCESSOR_CONTROLS_H_
#include "base/callback.h"
#include "media/base/media_export.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
namespace media {
// Audio processing metrics that are reported by the audio service.
struct MEDIA_EXPORT AudioProcessingStats {
absl::optional<double> echo_return_loss;
absl::optional<double> echo_return_loss_enhancement;
};
// Interactions with the audio service.
class MEDIA_EXPORT AudioProcessorControls {
public:
using GetStatsCB =
base::OnceCallback<void(const media::AudioProcessingStats& stats)>;
// Request the latest stats from the audio processor. Stats are returned
// asynchronously through |callback|.
virtual void GetStats(GetStatsCB callback) = 0;
// Set preferred number of microphone channels.
virtual void SetPreferredNumCaptureChannels(
int32_t num_preferred_channels) = 0;
protected:
virtual ~AudioProcessorControls() = default;
};
} // namespace media
#endif // MEDIA_BASE_AUDIO_PROCESSOR_CONTROLS_H_
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