> ## 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.

# GetXmaPacketFirstFrameOffsetInBits

> GetXmaPacketFirstFrameOffsetInBits

This is a helper function for the `XMA2PACKET` structure that returns the first frame offset.

## Syntax

```cpp theme={null}
DWORD GetXmaPacketFirstFrameOffsetInBits(  
         const BYTE* pPacket  
)  
```

### Parameters

*pPacket*   \_In\_bytecount\_(3)\
Type: BYTE\*

Pointer to the packet.

### Return value

Type: DWORD

The first frame offset, in bits.

## Remarks

`GetXmaPacketFirstFrameOffsetInBits` gets the bit offset of the first frame of the XBOX Media Audio (XMA) packet.

> [!NOTE]
>
> Bitfields cannot be read directly on little-endian architectures such as the Intel x86, as they are laid out in big-endian form.

For more information about XMA2, see [Overview of XMA2](https://docs.xbox.com/build/console-features/audio/overviews/xma2-overview.md). For an overview of the audio architecture of XBOX One, see **The sound of the future**: [The audio architecture in XBOX One](https://docs.xbox.com/build/console-features/audio/overviews/xbox-one-audio-architecture.md).

## Requirements

**Header:** xma2defs.h

**Supported platforms:** XBOX One family consoles and XBOX Series consoles

## See also

[xma2defs](https://docs.xbox.com/reference/audio/xma2defs/xma2defs_members.md)


## Related topics

- [XMA2Defs](https://docs.xbox.com/reference/audio/xma2defs/xma2defs_members.md)
- [GetXmaFrameLengthInBits](https://docs.xbox.com/reference/audio/xma2defs/functions/getxmaframelengthinbits.md)
- [XMA2PACKET](https://docs.xbox.com/reference/audio/xma2defs/structs/xma2packet.md)
- [GetXmaFrameBitPosition](https://docs.xbox.com/reference/audio/xma2defs/functions/getxmaframebitposition.md)
- [GetLastXmaFrameBitPosition](https://docs.xbox.com/reference/audio/xma2defs/functions/getlastxmaframebitposition.md)