// Copyright 2022 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.

library fuchsia.audio;

using zx;

/// Watches for a delay to change.
closed protocol DelayWatcher {
    /// The first call returns immediately with the current delay, if known.
    /// Subsequent calls block until the delay changes. There can be at most one
    /// outstanding call, otherwise the channel may be closed.
    strict WatchDelay(table {}) -> (table {
        /// Optional. If not specified, the delay is unknown.
        1: delay zx.Duration;
    });
};