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* ******************************************************************************
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* *
* * 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.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * 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.
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* * SPDX-License-Identifier: Apache-2.0
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package org.deeplearning4j.nn.conf.layers;
import lombok.*;
import org.deeplearning4j.nn.api.ParamInitializer;
import org.deeplearning4j.nn.conf.CNN2DFormat;
import org.deeplearning4j.nn.conf.InputPreProcessor;
import org.deeplearning4j.nn.conf.NeuralNetConfiguration;
import org.deeplearning4j.nn.conf.inputs.InputType;
import org.deeplearning4j.nn.conf.memory.LayerMemoryReport;
import org.deeplearning4j.nn.conf.memory.MemoryReport;
import org.deeplearning4j.nn.params.EmptyParamInitializer;
import org.deeplearning4j.optimize.api.TrainingListener;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import java.util.Collection;
import java.util.Map;
@Data
@NoArgsConstructor
@ToString(callSuper = true)
@EqualsAndHashCode(callSuper = true)
public class SpaceToDepthLayer extends NoParamLayer {
/**
* @deprecated Use {@link CNN2DFormat} instead
*/
@Deprecated
public enum DataFormat {
NCHW, NHWC;
public CNN2DFormat toFormat(){
return this == NCHW ? CNN2DFormat.NCHW : CNN2DFormat.NHWC;
}
}
protected int blockSize;
protected CNN2DFormat dataFormat;
protected SpaceToDepthLayer(Builder builder) {
super(builder);
this.setBlockSize(builder.blockSize);
this.setDataFormat(builder.dataFormat);
}
@Override
public SpaceToDepthLayer clone() {
return (SpaceToDepthLayer) super.clone();
}
@Override
public org.deeplearning4j.nn.api.Layer instantiate(NeuralNetConfiguration conf,
Collection trainingListeners, int layerIndex, INDArray layerParamsView,
boolean initializeParams, DataType networkDataType) {
org.deeplearning4j.nn.layers.convolution.SpaceToDepth ret =
new org.deeplearning4j.nn.layers.convolution.SpaceToDepth(conf, networkDataType);
ret.setListeners(trainingListeners);
ret.setIndex(layerIndex);
ret.setParamsViewArray(layerParamsView);
Map paramTable = initializer().init(conf, layerParamsView, initializeParams);
ret.setParamTable(paramTable);
ret.setConf(conf);
return ret;
}
@Override
public LayerMemoryReport getMemoryReport(InputType inputType) {
InputType.InputTypeConvolutional outputType = (InputType.InputTypeConvolutional) getOutputType(-1, inputType);
return new LayerMemoryReport.Builder(layerName, SpaceToDepthLayer.class, inputType, outputType)
.standardMemory(0, 0) //No params
.cacheMemory(MemoryReport.CACHE_MODE_ALL_ZEROS, MemoryReport.CACHE_MODE_ALL_ZEROS) //No caching
.build();
}
@Override
public InputType getOutputType(int layerIndex, InputType inputType) {
if (inputType == null || inputType.getType() != InputType.Type.CNN) {
throw new IllegalStateException("Invalid input for space to channels layer (layer name=\"" + getLayerName()
+ "\"): Expected CNN input, got " + inputType);
}
InputType.InputTypeConvolutional i = (InputType.InputTypeConvolutional) inputType;
return InputType.convolutional(i.getHeight() / blockSize, i.getWidth() / blockSize,
i.getChannels() * blockSize * blockSize, i.getFormat());
}
@Override
public ParamInitializer initializer() {
return EmptyParamInitializer.getInstance();
}
@Override
public void setNIn(InputType inputType, boolean override) {
this.dataFormat = ((InputType.InputTypeConvolutional)inputType).getFormat();
}
@Override
public InputPreProcessor getPreProcessorForInputType(InputType inputType) {
if (inputType == null) {
throw new IllegalStateException("Invalid input for space to channels layer (layer name=\"" + getLayerName()
+ "\"): input is null");
}
return InputTypeUtil.getPreProcessorForInputTypeCnnLayers(inputType, getLayerName());
}
@Override
public boolean isPretrainParam(String paramName) {
throw new UnsupportedOperationException("SpaceToDepthLayer does not contain parameters");
}
@NoArgsConstructor
@Getter
@Setter
public static class Builder> extends Layer.Builder {
protected int blockSize;
/**
* Data format for input activations. Note DL4J uses NCHW in most cases
*/
protected CNN2DFormat dataFormat = CNN2DFormat.NCHW;
/**
* @param blockSize Block size
*/
public Builder(int blockSize) {
this.setBlockSize(blockSize);
}
/**
* @param blockSize Block size
* @param dataFormat Data format for input activations. Note DL4J uses NCHW in most cases
*/
@Deprecated
public Builder(int blockSize, DataFormat dataFormat) {
this(blockSize, dataFormat.toFormat());
}
public Builder(int blockSize, CNN2DFormat dataFormat) {
this.setBlockSize(blockSize);
this.setDataFormat(dataFormat);
}
/**
* @param blockSize Block size
*/
public T blocks(int blockSize) {
this.setBlockSize(blockSize);
return (T) this;
}
/**
* @param dataFormat Data format for input activations. Note DL4J uses NCHW in most cases
* @deprecated Use {@link #dataFormat(CNN2DFormat)}
*/
@Deprecated
public T dataFormat(DataFormat dataFormat) {
return dataFormat(dataFormat.toFormat());
}
/**
* Set the data format for the CNN activations - NCHW (channels first) or NHWC (channels last).
* See {@link CNN2DFormat} for more details.
* Default: NCHW
* @param dataFormat Format for activations (in and out)
*/
public T dataFormat(CNN2DFormat dataFormat) {
this.setDataFormat(dataFormat);
return (T) this;
}
@Override
public T name(String layerName) {
this.setLayerName(layerName);
return (T) this;
}
@Override
@SuppressWarnings("unchecked")
public SpaceToDepthLayer build() {
return new SpaceToDepthLayer(this);
}
}
}