---
title: CMSampleDataReference
framework: coremedia
role: symbol
role_heading: Structure
path: coremedia/cmsampledatareference
---

# CMSampleDataReference

References sample data in at a URL.

## Declaration

```swift
struct CMSampleDataReference
```

## Overview

Overview The size of the data is provided as totalSampleSize.

## Topics

### Initializers

- [init(containerLocation:byteOffset:)](coremedia/cmsampledatareference/init(containerlocation:byteoffset:).md)

### Instance Properties

- [byteOffset](coremedia/cmsampledatareference/byteoffset.md)
- [containerLocation](coremedia/cmsampledatareference/containerlocation.md)

## Relationships

### Conforms To

- [CMSampleBuffer.Content](coremedia/cmsamplebuffer/content.md)
- [CMSampleBuffer.ContentWithFormatDescription](coremedia/cmsamplebuffer/contentwithformatdescription.md)
- [CMSampleBuffer.MultiSampleContent](coremedia/cmsamplebuffer/multisamplecontent.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Sample Processing

- [CMSampleBuffer](coremedia/cmsamplebuffer-api.md)
- [CMBlockBuffer](coremedia/cmblockbuffer-api.md)
- [CMTaggedBufferGroup](coremedia/cmtaggedbuffergroup.md)
- [CMFormatDescription](coremedia/cmformatdescription-api.md)
- [CMAttachment](coremedia/cmattachment-api.md)
- [CMTaggedBuffer](coremedia/cmtaggedbuffer.md)
- [CMMutableDataBlockBuffer](coremedia/cmmutabledatablockbuffer.md)
- [CMReadOnlyDataBlockBuffer](coremedia/cmreadonlydatablockbuffer.md)
- [CMReadySampleBuffer](coremedia/cmreadysamplebuffer.md)
- [CMTaggedDynamicBuffer](coremedia/cmtaggeddynamicbuffer.md)