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BatchToSpaceND.ts
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BatchToSpaceND.ts
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/**
* @license
* Copyright 2020 Google LLC. All Rights Reserved.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://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.
* =============================================================================
*/
import {backend_util, BatchToSpaceND, BatchToSpaceNDAttrs, BatchToSpaceNDInputs, KernelConfig, KernelFunc, TensorInfo} from '@tensorflow/tfjs-core';
import {MathBackendCPU} from '../backend_cpu';
import {assertNotComplex} from '../cpu_util';
import {reshape} from './Reshape';
import {slice} from './Slice';
import {transpose} from './Transpose';
export function batchToSpaceND(args: {
inputs: BatchToSpaceNDInputs,
backend: MathBackendCPU,
attrs: BatchToSpaceNDAttrs
}): TensorInfo {
const {inputs, backend, attrs} = args;
const {x} = inputs;
const {blockShape, crops} = attrs;
assertNotComplex([x], 'batchToSpaceND');
const prod = blockShape.reduce((a, b) => a * b);
const reshaped = backend_util.getReshaped(x.shape, blockShape, prod);
const permuted = backend_util.getPermuted(reshaped.length, blockShape.length);
const reshapedPermuted =
backend_util.getReshapedPermuted(x.shape, blockShape, prod);
const sliceBeginCoords =
backend_util.getSliceBeginCoords(crops, blockShape.length);
const sliceSize =
backend_util.getSliceSize(reshapedPermuted, crops, blockShape.length);
const xReshaped = reshape({inputs: {x}, backend, attrs: {shape: reshaped}});
const xTransposed =
transpose({inputs: {x: xReshaped}, backend, attrs: {perm: permuted}});
const xTransposedReshaped = reshape(
{inputs: {x: xTransposed}, backend, attrs: {shape: reshapedPermuted}});
const result = slice({
inputs: {x: xTransposedReshaped},
backend,
attrs: {begin: sliceBeginCoords, size: sliceSize}
});
backend.disposeIntermediateTensorInfo(xReshaped);
backend.disposeIntermediateTensorInfo(xTransposed);
backend.disposeIntermediateTensorInfo(xTransposedReshaped);
return result;
}
export const batchToSpaceNDConfig: KernelConfig = {
kernelName: BatchToSpaceND,
backendName: 'cpu',
kernelFunc: batchToSpaceND as unknown as KernelFunc
};