---
title: CMIOExtensionProvider
framework: coremediaio
role: symbol
role_heading: Class
path: coremediaio/cmioextensionprovider
---

# CMIOExtensionProvider

An object that manages device connections for a provider.

## Declaration

```swift
class CMIOExtensionProvider
```

## Mentioned in

Creating a camera extension with Core Media I/O

## Overview

Overview An extension provider manages device connections and provides the startService(provider:) class method that you call to bootstrap the service.

## Topics

### Creating a Provider

- [init(source:clientQueue:)](coremediaio/cmioextensionprovider/init(source:clientqueue:).md)

### Inspecting a Provider

- [clientQueue](coremediaio/cmioextensionprovider/clientqueue.md)
- [source](coremediaio/cmioextensionprovider/source.md)

### Starting a Provider

- [startService(provider:)](coremediaio/cmioextensionprovider/startservice(provider:).md)

### Managing Devices

- [devices](coremediaio/cmioextensionprovider/devices.md)
- [addDevice(_:)](coremediaio/cmioextensionprovider/adddevice(_:).md)
- [removeDevice(_:)](coremediaio/cmioextensionprovider/removedevice(_:).md)

### Managing Clients

- [connectedClients](coremediaio/cmioextensionprovider/connectedclients.md)
- [notifyPropertiesChanged(_:)](coremediaio/cmioextensionprovider/notifypropertieschanged(_:).md)

### Type Methods

- [ignoreSIGTERM()](coremediaio/cmioextensionprovider/ignoresigterm().md)
- [stopService(provider:)](coremediaio/cmioextensionprovider/stopservice(provider:).md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Providers

- [Creating a camera extension with Core Media I/O](coremediaio/creating-a-camera-extension-with-core-media-i-o.md)
- [Overriding the default USB video class extension](coremediaio/overriding-the-default-usb-video-class-extension.md)
- [CMIOExtensionProviderSource](coremediaio/cmioextensionprovidersource.md)
- [CMIOExtensionProviderProperties](coremediaio/cmioextensionproviderproperties.md)