org.nd4j.linalg.api.ops.impl.transforms.BaseDynamicTransformOp Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.linalg.api.ops.impl.transforms;
import lombok.val;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
import org.nd4j.linalg.api.shape.Shape;
import org.nd4j.linalg.util.ArrayUtil;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public abstract class BaseDynamicTransformOp extends DynamicCustomOp {
public BaseDynamicTransformOp() {}
public BaseDynamicTransformOp(SameDiff sameDiff, SDVariable[] args, boolean inPlace) {
super(null, sameDiff, args, inPlace);
}
public BaseDynamicTransformOp(INDArray[] inputs, INDArray[] outputs) {
super(null, inputs, outputs);
}
@Override
public List calculateOutputShape() {
val args = args();
if(args.length < 2) {
if(args[0] == null || args[0].getShape() == null) {
return Collections.emptyList();
}
return Arrays.asList(args[0].getShape());
}
val firstArgShape = args[0].getShape();
val secondArgShape = args[1].getShape();
if(args[0] == null || args[0].getShape() == null) {
return Collections.emptyList();
}
if(args[1] == null || args[1].getShape() == null) {
return Collections.emptyList();
}
if(Arrays.equals(firstArgShape, secondArgShape)){
return Collections.singletonList(firstArgShape);
}
//Handle broadcast shape: [1,4]+[3,1] = [3,4]
Shape.assertBroadcastable(firstArgShape, secondArgShape, this.getClass());
val outShape = Shape.broadcastOutputShape(firstArgShape, secondArgShape);
return Collections.singletonList(outShape);
}
}