---
title: "init(input:output:mode:size:filterParameters:)"
framework: accelerate
role: symbol
role_heading: Initializer
path: "accelerate/bnns/paddinglayer/init(input:output:mode:size:filterparameters:)"
---

# init(input:output:mode:size:filterParameters:)

Returns a new padding layer.

## Declaration

```swift
convenience init?(input: BNNSNDArrayDescriptor, output: BNNSNDArrayDescriptor, mode: BNNS.PaddingMode, size: [(x: Int, y: Int)], filterParameters: BNNSFilterParameters? = nil)
```

## Parameters

- `input`: The descriptor of the input.
- `output`: The descriptor of the output.
- `mode`: The mode the operation uses to pad.
- `size`: The number of padding elements to add before and after the original data.
- `filterParameters`: The filter runtime parameters.

## Discussion

Discussion important: Padding isn’t supported beyond 4D tensors.