> ## Documentation Index
> Fetch the complete documentation index at: https://docs.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](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/structs/shape_filtvol_context.md)\*

指向 [SHAPE\_FILTVOL\_CONTEXT](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/structs/shape_filtvol_context.md) 物件的指標。

### 傳回值

類型: SHAPE\_FILTER\_HEADROOM

[SHAPE\_FILTER\_HEADROOM](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/enums/shape_filter_headroom.md) 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](https://docs.xbox.com/zh-TW/build/console-features/audio/overviews/shape-overview.md)的[濾波器/音量區塊 (FLTVOL)](https://docs.xbox.com/zh-TW/build/console-features/audio/overviews/shape-overview.md#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](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/functions/setshapefiltvolinputheadroom.md)\
[ShapeFiltVolContext](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/shapefiltvolcontext_members.md)


## Related topics

- [SetShapeFiltVolInputHeadroom](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/functions/setshapefiltvolinputheadroom.md)
- [SHAPE_FILTER_HEADROOM](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/enums/shape_filter_headroom.md)
- [ShapeFiltVolContext](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/shapefiltvolcontext_members.md)
- [GetShapeFiltVolInternalSaturate](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/functions/getshapefiltvolinternalsaturate.md)
- [GetShapeFiltVolQ](https://docs.xbox.com/zh-TW/reference/audio/shapefiltvolcontext/functions/getshapefiltvolq.md)