/**
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* @license
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* Copyright 2019 Google Inc. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* =============================================================================
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*/
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import {Tensor} from '../tensor';
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import * as util from '../util';
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/**
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* Normalize noise shape based on provided tensor and noise shape.
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*
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* @param x Tensor.
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* @param noiseShape The shape for the randomly generated keep/drop flags, as
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* an array of numbers. Optional.
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* @returns Normalized noise shape.
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*/
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export function getNoiseShape(x: Tensor, noiseShape?: number[]): number[] {
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if (noiseShape == null) {
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return x.shape.slice();
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}
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if (util.arraysEqual(x.shape, noiseShape)) {
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return noiseShape;
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}
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if (x.shape.length === noiseShape.length) {
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const newDimension: number[] = [];
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for (let i = 0; i < x.shape.length; i++) {
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if (noiseShape[i] == null && x.shape[i] != null) {
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newDimension.push(x.shape[i]);
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} else {
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newDimension.push(noiseShape[i]);
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}
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}
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return newDimension;
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}
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return noiseShape;
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}
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