@tensorflow/tfjs-converter
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Tensorflow model converter for javascript
93 lines • 12 kB
JavaScript
/**
* @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.
* =============================================================================
*/
/**
* This differs from util.assertShapesMatch in that it allows values of
* negative one, an undefined size of a dimensinon, in a shape to match
* anything.
*/
import { util } from '@tensorflow/tfjs-core';
/**
* Used by TensorList and TensorArray to verify if elementShape matches, support
* negative value as the dim shape.
* @param shapeA
* @param shapeB
* @param errorMessagePrefix
*/
export function assertShapesMatchAllowUndefinedSize(shapeA, shapeB, errorMessagePrefix = '') {
// constant shape means unknown rank
if (typeof shapeA === 'number' || typeof shapeB === 'number') {
return;
}
util.assert(shapeA.length === shapeB.length, () => errorMessagePrefix + ` Shapes ${shapeA} and ${shapeB} must match`);
for (let i = 0; i < shapeA.length; i++) {
const dim0 = shapeA[i];
const dim1 = shapeB[i];
util.assert(dim0 < 0 || dim1 < 0 || dim0 === dim1, () => errorMessagePrefix + ` Shapes ${shapeA} and ${shapeB} must match`);
}
}
export function fullDefinedShape(elementShape) {
if (typeof elementShape === 'number' || elementShape.some(dim => dim < 0)) {
return false;
}
return true;
}
/**
* Generate the output element shape from the list elementShape, list tensors
* and input param.
* @param listElementShape
* @param tensors
* @param elementShape
*/
export function inferElementShape(listElementShape, tensors, elementShape) {
let partialShape = mergeElementShape(listElementShape, elementShape);
const notfullDefinedShape = !fullDefinedShape(partialShape);
if (notfullDefinedShape && tensors.length === 0) {
throw new Error(`Tried to calculate elements of an empty list` +
` with non-fully-defined elementShape: ${partialShape}`);
}
if (notfullDefinedShape) {
tensors.forEach(tensor => {
partialShape = mergeElementShape(tensor.shape, partialShape);
});
}
if (!fullDefinedShape(partialShape)) {
throw new Error(`Non-fully-defined elementShape: ${partialShape}`);
}
return partialShape;
}
export function mergeElementShape(elementShapeA, elementShapeB) {
if (typeof elementShapeA === 'number') {
return elementShapeB;
}
if (typeof elementShapeB === 'number') {
return elementShapeA;
}
if (elementShapeA.length !== elementShapeB.length) {
throw new Error(`Incompatible ranks during merge: ${elementShapeA} vs. ${elementShapeB}`);
}
const result = [];
for (let i = 0; i < elementShapeA.length; ++i) {
const dim0 = elementShapeA[i];
const dim1 = elementShapeB[i];
if (dim0 >= 0 && dim1 >= 0 && dim0 !== dim1) {
throw new Error(`Incompatible shape during merge: ${elementShapeA} vs. ${elementShapeB}`);
}
result[i] = dim0 >= 0 ? dim0 : dim1;
}
return result;
}
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All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\n/**\n * This differs from util.assertShapesMatch in that it allows values of\n * negative one, an undefined size of a dimensinon, in a shape to match\n * anything.\n */\n\nimport {Tensor, util} from '@tensorflow/tfjs-core';\n\n/**\n * Used by TensorList and TensorArray to verify if elementShape matches, support\n * negative value as the dim shape.\n * @param shapeA\n * @param shapeB\n * @param errorMessagePrefix\n */\nexport function assertShapesMatchAllowUndefinedSize(\n    shapeA: number|number[], shapeB: number|number[],\n    errorMessagePrefix = ''): void {\n  // constant shape means unknown rank\n  if (typeof shapeA === 'number' || typeof shapeB === 'number') {\n    return;\n  }\n  util.assert(\n      shapeA.length === shapeB.length,\n      () => errorMessagePrefix + ` Shapes ${shapeA} and ${shapeB} must match`);\n  for (let i = 0; i < shapeA.length; i++) {\n    const dim0 = shapeA[i];\n    const dim1 = shapeB[i];\n    util.assert(\n        dim0 < 0 || dim1 < 0 || dim0 === dim1,\n        () =>\n            errorMessagePrefix + ` Shapes ${shapeA} and ${shapeB} must match`);\n  }\n}\n\nexport function fullDefinedShape(elementShape: number|number[]): boolean {\n  if (typeof elementShape === 'number' || elementShape.some(dim => dim < 0)) {\n    return false;\n  }\n  return true;\n}\n/**\n * Generate the output element shape from the list elementShape, list tensors\n * and input param.\n * @param listElementShape\n * @param tensors\n * @param elementShape\n */\nexport function inferElementShape(\n    listElementShape: number|number[], tensors: Tensor[],\n    elementShape: number|number[]): number[] {\n  let partialShape = mergeElementShape(listElementShape, elementShape);\n  const notfullDefinedShape = !fullDefinedShape(partialShape);\n  if (notfullDefinedShape && tensors.length === 0) {\n    throw new Error(\n        `Tried to calculate elements of an empty list` +\n        ` with non-fully-defined elementShape: ${partialShape}`);\n  }\n  if (notfullDefinedShape) {\n    tensors.forEach(tensor => {\n      partialShape = mergeElementShape(tensor.shape, partialShape);\n    });\n  }\n  if (!fullDefinedShape(partialShape)) {\n    throw new Error(`Non-fully-defined elementShape: ${partialShape}`);\n  }\n  return partialShape as number[];\n}\n\nexport function mergeElementShape(\n    elementShapeA: number|number[], elementShapeB: number|number[]): number|\n    number[] {\n  if (typeof elementShapeA === 'number') {\n    return elementShapeB;\n  }\n  if (typeof elementShapeB === 'number') {\n    return elementShapeA;\n  }\n\n  if (elementShapeA.length !== elementShapeB.length) {\n    throw new Error(`Incompatible ranks during merge: ${elementShapeA} vs. ${\n        elementShapeB}`);\n  }\n\n  const result: number[] = [];\n  for (let i = 0; i < elementShapeA.length; ++i) {\n    const dim0 = elementShapeA[i];\n    const dim1 = elementShapeB[i];\n    if (dim0 >= 0 && dim1 >= 0 && dim0 !== dim1) {\n      throw new Error(`Incompatible shape during merge: ${elementShapeA} vs. ${\n          elementShapeB}`);\n    }\n    result[i] = dim0 >= 0 ? dim0 : dim1;\n  }\n  return result;\n}\n"]}