MPSNNLossCallback (moe.platform.ios API)

All Superinterfaces:

NSCoding, NSCopying, NSSecureCoding
```
public interface MPSNNLossCallback
extends NSSecureCoding, NSCopying
```
[@protocol] MPSNNLossCallback MPSNNLossCallback Defines a callback protocol for @ref MPSNNForwardLossNode and @ref MPSNNLossGradientNode to set the scalar weight value just before encoding the underlying kernels.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`float`	`scalarWeightForSourceImageDestinationImage(MPSImage sourceImage, MPSImage destinationImage)`	Returns the desired loss scaling weight value.

Methods inherited from interface apple.foundation.protocol.NSCoding
encodeWithCoder, initWithCoder

Methods inherited from interface apple.foundation.protocol.NSCopying
copyWithZone

Methods inherited from interface apple.foundation.protocol.NSSecureCoding
_supportsSecureCoding

- Method Detail
  - scalarWeightForSourceImageDestinationImage
```
float scalarWeightForSourceImageDestinationImage(MPSImage sourceImage,
                                                 MPSImage destinationImage)
```
    Returns the desired loss scaling weight value.
    
    Parameters:
    
    sourceImage - One of the source images in the batch given as a reference.
    
    destinationImage - One of the destination images in the batch given as a reference.
    
    Returns:
    
    The desired scalar weight value.