> ## 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.

# SetShapeXmaLoopStartOffset

> SetShapeXmaLoopStartOffset

# SetShapeXmaLoopStartOffset

设置 XMA 上下文循环的起始偏移量。

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## Syntax

```cpp theme={null}
HRESULT SetShapeXmaLoopStartOffset(  
         SHAPE_XMA_CONTEXT* context,  
         UINT32 offset  
)  
```

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### Parameters

*context*   \_Inout\_\
Type: [SHAPE\_XMA\_CONTEXT](/reference/audio/shapexmacontext/structs/shape_xma_context)\*

指向 [SHAPE\_XMA\_CONTEXT](/reference/audio/shapexmacontext/structs/shape_xma_context) 对象的指针。

*offset*   \
Type: UINT32

自读取缓冲区指针起、以位为单位的偏移量,解码将从该位置开始。

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### Return value

Type: HRESULT

HRESULT 成功或错误代码。

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## Remarks

有关 XMA 上下文循环的指南,请参阅 [ACP 概述](/build/console-features/audio/overviews/acp-overview) 中的[将 SRC 用于 PCM 和 XMA 数据的指南](/build/console-features/audio/overviews/acp-overview#ID4EUPAC)。

若要获取当前起始偏移量,请使用 [GetShapeXmaLoopStartOffset](/reference/audio/shapexmacontext/functions/getshapexmaloopstartoffset)。

有关详细信息,请参阅 [SHAPE 概述](/build/console-features/audio/overviews/shape-overview)的 [XMA](/build/console-features/audio/overviews/shape-overview#ID4EYD) 部分。

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## Requirements

**头文件:** shapexmacontext.h

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

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## See also

[ShapeXmaContext](/reference/audio/shapexmacontext/shapexmacontext_members)


## Related topics

- [GetShapeXmaLoopStartOffset](/zh-CN/reference/audio/shapexmacontext/functions/getshapexmaloopstartoffset.md)
- [ShapeXmaContext](/zh-CN/reference/audio/shapexmacontext/shapexmacontext_members.md)
- [SetShapeXmaLoopEndOffset](/zh-CN/reference/audio/shapexmacontext/functions/setshapexmaloopendoffset.md)
- [GetShapeXmaLoopEndOffset](/zh-CN/reference/audio/shapexmacontext/functions/getshapexmaloopendoffset.md)
- [SetShapeXmaNumLoops](/zh-CN/reference/audio/shapexmacontext/functions/setshapexmanumloops.md)