> ## 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.

# PartyAudioManipulationSourceStream::GetNextBuffer

> 获取流中下一个可用的缓冲区。

获取流中下一个可用的缓冲区。

## 语法

```cpp theme={null}
PartyError GetNextBuffer(  
    PartyMutableDataBuffer* buffer  
)  
```

### 参数

**`buffer`**   [PartyMutableDataBuffer\*](/services/playfab/multiplayer/networking/reference/structs/partymutabledatabuffer)
*输出*

输出缓冲区。如果没有可用的缓冲区,则 PartyMutableDataBuffer 的 *bufferByteCount* 字段为 0,其 *buffer* 字段为 nullptr。

### 返回值

PartyError

如果调用成功,则返回 `c_partyErrorSuccess`;否则返回错误代码。可以通过 [PartyManager::GetErrorMessage()](/services/playfab/multiplayer/networking/reference/classes/PartyManager/methods/partymanager_geterrormessage) 检索错误代码的人类可读形式。

## 备注

当检测到语音活动时,每 40 毫秒会有一个新缓冲区可用。否则,没有可用的缓冲区。通过此方法检索的缓冲区在使用完毕后必须通过 [PartyAudioManipulationSourceStream::ReturnBuffer()](/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/methods/partyaudiomanipulationsourcestream_returnbuffer) 返还给库。<br /><br /> 可以通过 [PartyAudioManipulationSourceStream::GetAvailableBufferCount()](/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/methods/partyaudiomanipulationsourcestream_getavailablebuffercount) 检索瞬时可用缓冲区的总数。可以在返还任何缓冲区之前连续检索多个缓冲区。<br /><br /> 每个缓冲区都采用 [PartyAudioManipulationSourceStream::GetFormat()](/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/methods/partyaudiomanipulationsourcestream_getformat) 指定的格式。<br /><br /> 提供的可变数据缓冲区使应用可以选择在原位修改音频。

## 要求

\*\*头文件:\*\*Party.h

## 另请参阅

[PartyAudioManipulationSourceStream](/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/partyaudiomanipulationsourcestream)
[PartyAudioManipulationSourceStream::GetFormat](/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/methods/partyaudiomanipulationsourcestream_getformat)
[PartyAudioManipulationSourceStream::ReturnBuffer](/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/methods/partyaudiomanipulationsourcestream_returnbuffer)


## Related topics

- [PartyAudioManipulationSourceStream](/zh-CN/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/partyaudiomanipulationsourcestream.md)
- [PartyAudioManipulationSourceStream::ReturnBuffer](/zh-CN/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/methods/partyaudiomanipulationsourcestream_returnbuffer.md)
- [PartyAudioManipulationSourceStream::GetFormat](/zh-CN/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/methods/partyaudiomanipulationsourcestream_getformat.md)
- [PartyAudioManipulationSourceStream::GetAvailableBufferCount](/zh-CN/services/playfab/multiplayer/networking/reference/classes/PartyAudioManipulationSourceStream/methods/partyaudiomanipulationsourcestream_getavailablebuffercount.md)
- [PartyAudioManipulationSourceStreamConfiguration](/zh-CN/services/playfab/multiplayer/networking/reference/structs/partyaudiomanipulationsourcestreamconfiguration.md)