org.nd4j.linalg.api.ops.impl.layers.recurrent.outputs.SRULayerOutputs Maven / Gradle / Ivy
package org.nd4j.linalg.api.ops.impl.layers.recurrent.outputs;
import java.util.Arrays;
import java.util.List;
import lombok.AccessLevel;
import lombok.Getter;
import org.nd4j.autodiff.samediff.SDIndex;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.base.Preconditions;
import org.nd4j.linalg.api.ops.impl.layers.recurrent.GRUCell;
/**
* The outputs of a GRU cell ({@link GRUCell}.
*/
@Getter
public class SRULayerOutputs {
/**
* Current cell output [batchSize, inSize, timeSeriesLength].
*/
private SDVariable h;
/**
* Current cell state [batchSize, inSize, timeSeriesLength].
*/
private SDVariable c;
public SRULayerOutputs(SDVariable[] outputs){
Preconditions.checkArgument(outputs.length == 2,
"Must have 2 SRU cell outputs, got %s", outputs.length);
h = outputs[0];
c = outputs[1];
}
/**
* Get all outputs returned by the cell.
*/
public List getAllOutputs(){
return Arrays.asList(h, c);
}
/**
* Get h, the output of the cell.
*
* Has shape [batchSize, inSize, timeSeriesLength].
*/
public SDVariable getOutput(){
return h;
}
/**
* Get c, the state of the cell.
*
* Has shape [batchSize, inSize, timeSeriesLength].
*/
public SDVariable getState(){
return c;
}
private SDVariable lastOutput = null;
/**
* Get y, the output of the cell, for the last time step.
*
* Has shape [batchSize, inSize].
*/
public SDVariable getLastOutput(){
if(lastOutput != null)
return lastOutput;
lastOutput = getOutput().get(SDIndex.all(), SDIndex.all(), SDIndex.point(-1));
return lastOutput;
}
private SDVariable lastState = null;
/**
* Get c, the state of the cell, for the last time step.
*
* Has shape [batchSize, inSize].
*/
public SDVariable getLastState(){
if(lastState != null)
return lastState;
lastOutput = getOutput().get(SDIndex.all(), SDIndex.all(), SDIndex.point(-1));
return lastState;
}
}