# ReadPackedIntDelta(int, in StreamCompressionModel)

> Reads a 4-byte signed integer delta value from the data stream using a StreamCompressionModel.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Collections](/engine/6000.7/script-reference/unity/collections.md)
* **Assembly:** UnityEngine.ManagedKernelModule

## ReadPackedIntDelta(int, StreamCompressionModel)

```csharp
public int ReadPackedIntDelta(int baseline, in StreamCompressionModel model)
```

### Parameters

**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): The previous 4-byte signed integer value, used to compute the diff.**** (\[StreamCompressionModel]\(/engine/6000.7/script-reference/unity/collections/streamcompressionmodel)): [StreamCompressionModel](/engine/6000.7/script-reference/unity/collections/streamcompressionmodel.md) model for reading value in a packed manner.

### Returns

| Type                                                       | Description                                                                                                                                            |
| ---------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
| [int](https://learn.microsoft.com/dotnet/api/system.int32) | A 4-byte signed integer read from the current stream, or 0 if the end of the stream has been reached. If the data did not change, this also returns 0. |