> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt
> 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](/reference/audio/shapefiltvolcontext/structs/shape_filtvol_context)\*

指向 [SHAPE\_FILTVOL\_CONTEXT](/reference/audio/shapefiltvolcontext/structs/shape_filtvol_context) 对象的指针。

*inputHeadroom*   \
类型:[SHAPE\_FILTER\_HEADROOM](/reference/audio/shapefiltvolcontext/enums/shape_filter_headroom)

[SHAPE\_FILTER\_HEADROOM](/reference/audio/shapefiltvolcontext/enums/shape_filter_headroom) 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](/build/console-features/audio/overviews/shape-overview) 的 [滤波器/音量模块 (FLTVOL)](/build/console-features/audio/overviews/shape-overview#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](/reference/audio/shapefiltvolcontext/functions/getshapefiltvolinputheadroom)\
[ShapeFiltVolContext](/reference/audio/shapefiltvolcontext/shapefiltvolcontext_members)