> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

# SetShapeFiltVolInputHeadroom

> SetShapeFiltVolInputHeadroom

# SetShapeFiltVolInputHeadroom

设置输入余量(headroom)。

## 语法

```cpp theme={null}
HRESULT SetShapeFiltVolInputHeadroom(  
         SHAPE_FILTVOL_CONTEXT* context,  
         SHAPE_FILTER_HEADROOM inputHeadroom  
)  
```

### 参数

*context*   \_Inout\_\
类型:[SHAPE\_FILTVOL\_CONTEXT](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/structs/shape_filtvol_context.md)\*

指向 [SHAPE\_FILTVOL\_CONTEXT](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/structs/shape_filtvol_context.md) 对象的指针。

*inputHeadroom*   \
类型:[SHAPE\_FILTER\_HEADROOM](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/enums/shape_filter_headroom.md)

[SHAPE\_FILTER\_HEADROOM](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/enums/shape_filter_headroom.md) 枚举的一个成员。

### 返回值

类型:HRESULT

HRESULT 成功或错误代码。

## 注解

状态变量滤波器的本质使其可能产生共振,导致中间值超过 1.0(或 -1.0)。为缓解中间值饱和带来的问题,FLTVOL 模块具备可编程的余量缩放,该缩放会应用于输入信号,并在输出时进行补偿。

有关详细信息,请参阅 [SHAPE 概述](https://docs.xbox.com/zh-CN/build/console-features/audio/overviews/shape-overview.md) 的 [滤波器/音量模块 (FLTVOL)](https://docs.xbox.com/zh-CN/build/console-features/audio/overviews/shape-overview.md#ID4EBH) 部分。

## 要求

**头文件:** shapefiltvolcontext.h

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

## 另请参阅

[GetShapeFiltVolInputHeadroom](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/functions/getshapefiltvolinputheadroom.md)\
[ShapeFiltVolContext](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/shapefiltvolcontext_members.md)


## Related topics

- [GetShapeFiltVolInputHeadroom](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/functions/getshapefiltvolinputheadroom.md)
- [SHAPE_FILTER_HEADROOM](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/enums/shape_filter_headroom.md)
- [GetShapeFiltVolInternalSaturate](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/functions/getshapefiltvolinternalsaturate.md)
- [ShapeFiltVolContext](https://docs.xbox.com/zh-CN/reference/audio/shapefiltvolcontext/shapefiltvolcontext_members.md)
- [SetShapeFiltVolCommand](https://docs.xbox.com/zh-CN/reference/audio/shapeflowgraph/functions/setshapefiltvolcommand.md)