---
title: streamingAdvanceCount
framework: accelerate
role: symbol
role_heading: Instance Property
path: accelerate/bnnsgraph/context/streamingadvancecount
---

# streamingAdvanceCount

Sets streaming advancement amount for cases with dynamically shaped inputs.

## Declaration

```swift
var streamingAdvanceCount: Int { get set }
```

## Parameters

- `context`: The graph context.
- `advance_count`: An integer value that specifies the number of elements that the function advances the internal state pointer.

## Discussion

Discussion For models compiled with the BNNSOption attribute StateMode=Streaming enabled, where slice_update operations use an update parameter of dynamic shape, BNNS can’t unambigiously determine the streaming advancement size. In this case, call this function before calling BNNSGraphContextExecute(_:_:_:_:_:_:) to set the advancement size for each frame. This function advances the internal state pointer by advance_count elements in the streaming dimension before returning from BNNSGraphContextExecute(_:_:_:_:_:_:). note: The BNNS streaming APIs do not support models that require different advancement amounts for different states.