---
title: GetAvailableStreamFormats
framework: audiodriverkit
role: symbol
role_heading: Instance Method
path: audiodriverkit/iouseraudiostream/getavailablestreamformats
---

# GetAvailableStreamFormats

Returns the available stream formats as an array of audio stream basic descriptions.

## Declaration

```occ
size_t GetAvailableStreamFormats(IOUserAudioStreamBasicDescription *out_formats, size_t in_num_formats);
```

## Parameters

- `out_formats`: A pointer to a buffer of type IOUserAudioStreamBasicDescription, with a size of in_num_formats. On return, this buffer contains the available formats.
- `in_num_formats`: The size of the out_formats buffer.

## Return Value

Return Value The number of descriptions populated in the out_formats buffer.

## Discussion

Discussion This method synchronizes by using the work queue created by the object.

## See Also

### Working with Stream Formats

- [SetCurrentStreamFormat](audiodriverkit/iouseraudiostream/setcurrentstreamformat.md)
- [GetCurrentStreamFormat](audiodriverkit/iouseraudiostream/getcurrentstreamformat.md)
- [SetAvailableStreamFormats](audiodriverkit/iouseraudiostream/setavailablestreamformats.md)
- [GetNumberAvailableStreamFormats](audiodriverkit/iouseraudiostream/getnumberavailablestreamformats.md)
- [IOUserAudioStreamBasicDescription](audiodriverkit/audiodriverkit/iouseraudiostreambasicdescription.md)
- [GetStreamDirection](audiodriverkit/iouseraudiostream/getstreamdirection.md)
- [IOUserAudioStreamDirection](audiodriverkit/audiodriverkit/iouseraudiostreamdirection.md)
- [SetStreamIsActive](audiodriverkit/iouseraudiostream/setstreamisactive.md)
- [GetStreamIsActive](audiodriverkit/iouseraudiostream/getstreamisactive.md)