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/*******************************************************************************
* 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.layers.recurrent.config;
import lombok.Builder;
import lombok.Data;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.linalg.util.ArrayUtil;
import java.util.LinkedHashMap;
import java.util.Map;
@Builder
@Data
public class LSTMCellConfiguration {
/**
* NDArray* xt = INPUT_VARIABLE(0); // input [batchSize x inSize]
NDArray* ht_1 = INPUT_VARIABLE(1); // previous cell output [batchSize x numProj], that is at previous time step t-1, in case of projection=false -> numProj=numUnits!!!
NDArray* ct_1 = INPUT_VARIABLE(2); // previous cell state [batchSize x numUnits], that is at previous time step t-1
NDArray* Wx = INPUT_VARIABLE(3); // input-to-hidden weights, [inSize x 4*numUnits]
NDArray* Wh = INPUT_VARIABLE(4); // hidden-to-hidden weights, [numProj x 4*numUnits]
NDArray* Wc = INPUT_VARIABLE(5); // diagonal weights for peephole connections [1 x 3*numUnits]
NDArray* Wp = INPUT_VARIABLE(6); // projection weights [numUnits x numProj]
NDArray* b = INPUT_VARIABLE(7); // biases, [1 x 4*numUnits]
NDArray* ht = OUTPUT_VARIABLE(0); // current cell output [batchSize x numProj], that is at current time step t
NDArray* ct = OUTPUT_VARIABLE(1); // current cell state [batchSize x numUnits], that is at current time step t
const bool peephole = (bool)INT_ARG(0); // if true, provide peephole connections
const bool projection = (bool)INT_ARG(1); // if true, then projection is performed, if false then numProj==numUnits is mandatory!!!!
T clippingCellValue = T_ARG(0); // clipping value for ct, if it is not equal to zero, then cell state is clipped
T clippingProjValue = T_ARG(1); // clipping value for projected ht, if it is not equal to zero, then projected cell output is clipped
const T forgetBias = T_ARG(2);
*/
private boolean peepHole;
private boolean projection;
private double clippingCellValue;
private double clippingProjValue;
private double forgetBias;
//input variables
private SDVariable xt,ht_1,ct_1,Wx,Wh,Wc,Wp,b;
public Map toProperties() {
Map ret = new LinkedHashMap<>();
ret.put("peepHole",peepHole);
ret.put("projection",projection);
ret.put("clippingCellValue",clippingCellValue);
ret.put("clippingProjValue",clippingProjValue);
ret.put("forgetBias",forgetBias);
return ret;
}
public SDVariable[] args() {
return new SDVariable[] {xt,ht_1,ct_1,Wx,Wh,Wc,Wp,b};
}
public int[] iArgs() {
return new int[] {ArrayUtil.fromBoolean(peepHole),ArrayUtil.fromBoolean(projection)};
}
public double[] tArgs() {
return new double[] {clippingCellValue,clippingProjValue,forgetBias};
}
}