# MediaDeviceRoutingManager An object used by a [`MediaDeviceExtension`](/documentation/MediaDevice/MediaDeviceExtension) to report device discovery, state changes, and playback events back to the system. ``` @MainActor final class MediaDeviceRoutingManager ``` ## Topics ### Instance Methods [`func activatedDevice(MediaOutputDevice, session: MediaOutputSession)`](/documentation/MediaDevice/MediaDeviceRoutingManager/activatedDevice(_:session:)) Notifies the system that a device has been successfully activated and is ready for use. [`func discoveryFailed(MediaDeviceError)`](/documentation/MediaDevice/MediaDeviceRoutingManager/discoveryFailed(_:)) Reports a discovery failure to the system, indicating that the extension was unable to search for devices. [`func failedToActivateDevice(MediaOutputDevice, session: MediaOutputSession, error: MediaDeviceError)`](/documentation/MediaDevice/MediaDeviceRoutingManager/failedToActivateDevice(_:session:error:)) Reports a device activation failure to the system so it can inform the user and clean up the session. [`func foundDevice(MediaOutputDevice)`](/documentation/MediaDevice/MediaDeviceRoutingManager/foundDevice(_:)) Notifies the system of a new media device, so it can be included in device lists for users to select. [`func lostDevice(MediaOutputDevice)`](/documentation/MediaDevice/MediaDeviceRoutingManager/lostDevice(_:)) Removes a device from the system’s device lists so users can no longer select it. [`func receiveData(Data, fromApplication: String, session: MediaOutputSession)`](/documentation/MediaDevice/MediaDeviceRoutingManager/receiveData(_:fromApplication:session:)) Delivers data received from a remote application to the system for processing. [`func reportQualityMetricsPassed(Bool, forSession: MediaOutputSession)`](/documentation/MediaDevice/MediaDeviceRoutingManager/reportQualityMetricsPassed(_:forSession:)) Reports whether the realtime sample delivery session has met its quality KPIs. [`func requestPairingCode(for: MediaOutputDevice, session: MediaOutputSession, reason: LocalizedStringResource, authorizationMethod: MediaOutputDevice.AuthorizationMethod)`](/documentation/MediaDevice/MediaDeviceRoutingManager/requestPairingCode(for:session:reason:authorizationMethod:)) Presents a pairing user interface so the user can enter authorization credentials for a device. [`func sessionFailed(MediaOutputSession, error: MediaDeviceError)`](/documentation/MediaDevice/MediaDeviceRoutingManager/sessionFailed(_:error:)) Reports an unrecoverable session error to the system so it can end the session and inform the user. [`func started(application: String?, playbackControl: T, session: MediaOutputSession)`](/documentation/MediaDevice/MediaDeviceRoutingManager/started(application:playbackControl:session:)) Notifies the system that a remote application has successfully started on the target device. [`func updateDevices([MediaOutputDevice])`](/documentation/MediaDevice/MediaDeviceRoutingManager/updateDevices(_:)) Notifies the system that one or more devices have changed state, so their information can be refreshed in device lists. [`func volumeChanged(for: MediaOutputDevice)`](/documentation/MediaDevice/MediaDeviceRoutingManager/volumeChanged(for:)) Notifies the system that the volume state has changed on a remote device. ### Type Methods [`static func routingManager(for: any MediaDeviceExtension) -> MediaDeviceRoutingManager`](/documentation/MediaDevice/MediaDeviceRoutingManager/routingManager(for:)) Returns the shared routing manager instance for a media device extension. ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sendable`](/documentation/Swift/Sendable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)