> ## Documentation Index
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# XUserDefaultAudioEndpointKind

> XUserDefaultAudioEndpointKind

# XUserDefaultAudioEndpointKind

指定用户的默认音频终结点是呈现还是捕获音频。

## Syntax

```cpp theme={null}
enum class XUserDefaultAudioEndpointKind  : uint32_t  
{  
    CommunicationRender = 0,  
    CommunicationCapture = 1  
}  
```

## Constants

| 常量                   | 说明              |
| -------------------- | --------------- |
| CommunicationRender  | 用户的默认音频终结点呈现音频。 |
| CommunicationCapture | 用户的默认音频终结点捕获音频。 |

## Remarks

[XUserGetDefaultAudioEndpointUtf16](/reference/system/xuser/functions/xusergetdefaultaudioendpointutf16) 函数使用 XUserDefaultAudioEndpointKind 枚举参数来获取用户的默认音频终结点。
[XUserDefaultAudioEndpointUtf16ChangedCallback](/reference/system/xuser/functions/xuserdefaultaudioendpointutf16changedcallback) 函数接受 XUserDefaultAudioEndpointKind 枚举参数，并在用户的默认音频终结点更改时被调用。

以下示例演示了如何检索用户的默认音频终结点。

```cpp theme={null}
HRESULT GetAudioDeviceAssociation(
    IMMDeviceEnumerator* audioDeviceEnumerator,
    XUserLocalId user,
    XUserDefaultAudioEndpointKind defaultAudioEndpointKind,
    _Outptr_result_maybenull_ IMMDevice** endpoint)
{
    wchar_t audioDeviceId[XUserAudioEndpointMaxUtf16Count];
    RETURN_IF_FAILED_WITH_EXPECTED(XUserGetDefaultAudioEndpointUtf16(user, defaultAudioEndpointKind, std::size(audioDeviceId), audioDeviceId, nullptr), E_NOTFOUND);

    return audioDeviceEnumerator->GetDevice(audioDeviceId, endpoint);
}

HRESULT GetAudioAssociations()
{
    Mwrl::ComPtr<IMMDeviceEnumerator> audioDeviceEnumerator;

    RETURN_IF_FAILED(CoCreateInstance(
        __uuidof(MMDeviceEnumerator),
        nullptr,
        CLSCTX_ALL,
        __uuidof(IMMDeviceEnumerator),
        (void**)&audioDeviceEnumerator));

    XUserLocalId userLocalId;
    RETURN_IF_FAILED(XUserGetLocalId(_handle.get(), &userLocalId));

    {
        wil::unique_cotaskmem_string id;
        Mwrl::ComPtr<IMMDevice> device;
        if (SUCCEEDED(GetAudioDeviceAssociation(audioDeviceEnumerator.Get(), userLocalId, XUserDefaultAudioEndpointKind::CommunicationRender, &device)))
        {
            RETURN_IF_FAILED(device->GetId(&id));
        }
        appLog.AddLog("Preferred render communication device id: %S\n", id.get());
    }

    {
        wil::unique_cotaskmem_string id;
        Mwrl::ComPtr<IMMDevice> device;
        if (SUCCEEDED(GetAudioDeviceAssociation(audioDeviceEnumerator.Get(), userLocalId, XUserDefaultAudioEndpointKind::CommunicationCapture, &device)))
        {
            RETURN_IF_FAILED(device->GetId(&id));
        }
        appLog.AddLog("Preferred capture communication device id: %S\n", id.get());
    }

    return S_OK;
}
```

## Requirements

**头文件：** XUser.h

**受支持的平台：** Windows、XBOX One 系列主机和 XBOX Series 主机

## See also

[XUser](/reference/system/xuser/xuser_members)

[XUserGetDefaultAudioEndpointUtf16](/reference/system/xuser/functions/xusergetdefaultaudioendpointutf16)

[XUserDefaultAudioEndpointUtf16ChangedCallback](/reference/system/xuser/functions/xuserdefaultaudioendpointutf16changedcallback)