org.nd4j.linalg.api.ops.impl.layers.convolution.Im2colBp Maven / Gradle / Ivy
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* * terms of the Apache License, Version 2.0 which is available at
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package org.nd4j.linalg.api.ops.impl.layers.convolution;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.common.base.Preconditions;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
import org.nd4j.linalg.api.ops.impl.layers.convolution.config.Conv2DConfig;
import org.nd4j.common.util.ArrayUtil;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public class Im2colBp extends DynamicCustomOp {
protected Conv2DConfig conv2DConfig;
public Im2colBp(SameDiff sameDiff, SDVariable i2cInput, SDVariable gradAtOutput, Conv2DConfig conv2DConfig) {
super(null, sameDiff,new SDVariable[]{i2cInput, gradAtOutput});
this.conv2DConfig = conv2DConfig;
addArgs();
}
public Im2colBp(SameDiff sd, SDVariable input, Conv2DConfig config) {
super(null, sd, new SDVariable[]{input});
this.conv2DConfig = config;
addArgs();
}
public Im2colBp() {}
protected void addArgs() {
addIArgument(conv2DConfig.getKH());
addIArgument(conv2DConfig.getKW());
addIArgument(conv2DConfig.getSH());
addIArgument(conv2DConfig.getSW());
addIArgument(conv2DConfig.getPH());
addIArgument(conv2DConfig.getPW());
addIArgument(conv2DConfig.getDH());
addIArgument(conv2DConfig.getDW());
addIArgument(conv2DConfig.getPaddingMode().index);
}
@Override
public Map propertiesForFunction() {
return conv2DConfig.toProperties();
}
@Override
public String opName() {
return "im2col_bp";
}
@Override
public List doDiff(List f1) {
throw new UnsupportedOperationException("Differentiation not supported for this op: " + getClass().getSimpleName());
}
@Override
public List calculateOutputDataTypes(List inputDataTypes){
Preconditions.checkState(inputDataTypes != null && inputDataTypes.size() == 2, "Expected 2 input data types for %s, got %s", getClass(), inputDataTypes);
return Collections.singletonList(inputDataTypes.get(0));
}
}