// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// TODO(fxbug.dev/36191): Move to fuchsia.media.audio

library fuchsia.media;

/// A protocol for monitoring the usage activity of the AudioRenderers and AudioCapturers.
[Discoverable]
protocol ActivityReporter {
    /// Notifies the client whenever there is a change in the set of active AudioRenderUsages.
    /// It returns immediately the first time that it is called.
    WatchRenderActivity() -> (vector<AudioRenderUsage>:RENDER_USAGE_COUNT active_usages);

    /// Notifies the client whenever there is a change in the set of active AudioCaptureUsages.
    /// It returns immediately the first time that it is called.
    WatchCaptureActivity() -> (vector<AudioCaptureUsage>:CAPTURE_USAGE_COUNT active_usages);
};