> ## 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.

# GetShapeFiltVolInputHeadroom

> GetShapeFiltVolInputHeadroom

# GetShapeFiltVolInputHeadroom

取得輸入餘裕空間 (headroom)。

## 語法

```cpp theme={null}
SHAPE_FILTER_HEADROOM GetShapeFiltVolInputHeadroom(  
         const SHAPE_FILTVOL_CONTEXT* context  
)  
```

### 參數

*context*   \_In\_\
類型: [SHAPE\_FILTVOL\_CONTEXT](/zh-TW/reference/audio/shapefiltvolcontext/structs/shape_filtvol_context)\*

指向 [SHAPE\_FILTVOL\_CONTEXT](/zh-TW/reference/audio/shapefiltvolcontext/structs/shape_filtvol_context) 物件的指標。

### 傳回值

類型: SHAPE\_FILTER\_HEADROOM

[SHAPE\_FILTER\_HEADROOM](/zh-TW/reference/audio/shapefiltvolcontext/enums/shape_filter_headroom) 列舉的成員。

## 備註

狀態變數濾波器本身的特性可能會產生共振,導致中間值超過 1.0 (或 -1.0)。為了減輕中間值飽和所造成的問題,FLTVOL 區塊具有可程式化的餘裕空間縮放量,此縮放會套用至傳入的訊號,然後在輸出時加以補償。

如需詳細資訊,請參閱 [SHAPE 概觀](/zh-TW/build/console-features/audio/overviews/shape-overview)的[濾波器/音量區塊 (FLTVOL)](/zh-TW/build/console-features/audio/overviews/shape-overview#ID4EBH) 一節。

## 需求

**標頭:** shapefiltvolcontext.h

**支援的平台:** XBOX One 系列主機和 XBOX Series 主機

## 另請參閱

[SetShapeFiltVolInputHeadroom](/zh-TW/reference/audio/shapefiltvolcontext/functions/setshapefiltvolinputheadroom)\
[ShapeFiltVolContext](/zh-TW/reference/audio/shapefiltvolcontext/shapefiltvolcontext_members)


## Related topics

- [GetShapeFiltVolInputHeadroom](/reference/audio/shapefiltvolcontext/functions/getshapefiltvolinputheadroom.md)
- [SetShapeFiltVolInputHeadroom](/es/reference/audio/shapefiltvolcontext/functions/setshapefiltvolinputheadroom.md)