@tensorflow/tfjs-converter
Version:
Tensorflow model converter for javascript
133 lines • 19.6 kB
JavaScript
/**
* @license
* Copyright 2018 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 { clone, util } from '@tensorflow/tfjs-core';
export function getParamValue(paramName, node, tensorMap, context, resourceManager) {
const inputParam = node.inputParams[paramName];
if (inputParam && inputParam.inputIndexStart !== undefined) {
const start = inputParam.inputIndexStart;
const end = inputParam.inputIndexEnd === 0 ?
undefined :
(inputParam.inputIndexEnd === undefined ? start + 1 :
inputParam.inputIndexEnd);
if (inputParam.type === 'tensor') {
return getTensor(node.inputNames[inputParam.inputIndexStart], tensorMap, context, resourceManager);
}
if (inputParam.type === 'tensors') {
const inputs = node.inputNames.slice(start, end);
return inputs.map(name => getTensor(name, tensorMap, context, resourceManager));
}
const tensor = getTensor(node.inputNames.slice(start)[0], tensorMap, context, resourceManager);
const data = tensor.dataSync();
return inputParam.type === 'number' ?
data[0] :
util.toNestedArray(tensor.shape, data);
}
const attrParam = node.attrParams[paramName];
return attrParam && attrParam.value;
}
/**
* Retrieve the tensor from tensorsMap based on input name.
* @param name Node input name
* @param tensorsMap Tensors map keyed by the node
* @param context contains tensors and information for running the current node.
* @param resourceManager Optional. Contains global resources of the model.
*/
export function getTensor(name, tensorsMap, context, resourceManager) {
const [nodeName, index] = parseNodeName(name);
if (resourceManager != null) {
const tensor = resourceManager.getHashTableHandleByName(nodeName);
if (tensor != null) {
return tensor;
}
}
const contextId = context.currentContextIds.find(contextId => {
return !!tensorsMap[getNodeNameWithContextId(nodeName, contextId)];
});
return contextId !== undefined ?
tensorsMap[getNodeNameWithContextId(nodeName, contextId)][index] :
undefined;
}
/**
* Retrieve the tensors based on input name for current context.
* @param name Node input name
* @param tensorsMap Tensors map keyed by the node
*/
export function getTensorsForCurrentContenxt(name, tensorsMap, context) {
return tensorsMap[getNodeNameWithContextId(name, context.currentContextId)];
}
/**
* Returns the node name, outputName and index from the Node input name.
* @param inputName The input name of the node, in format of
* node_name:output_index, i.e. MatMul:0, if the output_index is not set, it is
* default to 0.
* If the input name contains output name i.e. StringSplit:indices:0, it will
* return ['StringSplit', 0, 'indices'].
*/
export function getNodeNameAndIndex(inputName, context) {
const [nodeName, index, outputName] = parseNodeName(inputName);
return [
getNodeNameWithContextId(nodeName, context && context.currentContextId),
index, outputName
];
}
function getNodeNameWithContextId(name, contextId) {
return !!contextId ? `${name}-${contextId}` : name;
}
export function parseNodeName(name) {
const parts = name.split(':');
if (parts.length === 1) {
return [name, 0, undefined];
}
const nodeName = parts[0];
const outputName = parts.length === 3 ? parts[1] : undefined;
const index = Number(parts[parts.length - 1]);
return [nodeName, index, outputName];
}
export function split(arr, size) {
const res = [];
for (let i = 0; i < arr.length; i += size) {
res.push(arr.slice(i, i + size));
}
return res;
}
export function getPadding(node, tensorMap, context) {
let pad = getParamValue('pad', node, tensorMap, context);
if (pad === 'explicit') {
// This is 1d array, we need to convert it to 2d array
pad = getParamValue('explicitPaddings', node, tensorMap, context);
const explicitPadding = [[0, 0], [0, 0], [0, 0], [0, 0]];
for (let i = 0; i < 4; i++) {
explicitPadding[i][0] = pad[i * 2];
explicitPadding[i][1] = pad[i * 2 + 1];
}
return explicitPadding;
}
return pad;
}
/**
* Reuse the tensor if it is marked as keep, otherwise clone the tensor to
* avoid disposal. This is important for TensorArray and TensorList ops, since
* internally they use a tensor as the id for TensorArray and TensorList, and
* to simplify lookup, they also use Tensor.id as the key to the internal map.
* These id tensors have been marked as kept in the backend, we need avoid clone
* them in order to create new Tensor.id.
* @param tensor
*/
export function cloneTensor(tensor) {
return tensor.kept ? tensor : clone(tensor);
}
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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\nimport {clone, Tensor, util} from '@tensorflow/tfjs-core';\n\nimport {NamedTensorsMap} from '../../data/types';\nimport {ExecutionContext} from '../../executor/execution_context';\nimport {ResourceManager} from '../../executor/resource_manager';\nimport {Node, ValueType} from '../types';\n\nexport function getParamValue(\n    paramName: string, node: Node, tensorMap: NamedTensorsMap,\n    context: ExecutionContext, resourceManager?: ResourceManager): ValueType {\n  const inputParam = node.inputParams[paramName];\n  if (inputParam && inputParam.inputIndexStart !== undefined) {\n    const start = inputParam.inputIndexStart;\n    const end = inputParam.inputIndexEnd === 0 ?\n        undefined :\n        (inputParam.inputIndexEnd === undefined ? start + 1 :\n                                                  inputParam.inputIndexEnd);\n    if (inputParam.type === 'tensor') {\n      return getTensor(\n          node.inputNames[inputParam.inputIndexStart], tensorMap, context,\n          resourceManager);\n    }\n    if (inputParam.type === 'tensors') {\n      const inputs = node.inputNames.slice(start, end);\n\n      return inputs.map(\n          name => getTensor(name, tensorMap, context, resourceManager));\n    }\n    const tensor = getTensor(\n        node.inputNames.slice(start)[0], tensorMap, context, resourceManager);\n    const data = tensor.dataSync();\n    return inputParam.type === 'number' ?\n        data[0] :\n        util.toNestedArray(tensor.shape, data);\n  }\n  const attrParam = node.attrParams[paramName];\n  return attrParam && attrParam.value;\n}\n\n/**\n * Retrieve the tensor from tensorsMap based on input name.\n * @param name Node input name\n * @param tensorsMap Tensors map keyed by the node\n * @param context contains tensors and information for running the current node.\n * @param resourceManager Optional. Contains global resources of the model.\n */\nexport function getTensor(\n    name: string, tensorsMap: NamedTensorsMap, context: ExecutionContext,\n    resourceManager?: ResourceManager): Tensor {\n  const [nodeName, index] = parseNodeName(name);\n\n  if (resourceManager != null) {\n    const tensor = resourceManager.getHashTableHandleByName(nodeName);\n    if (tensor != null) {\n      return tensor;\n    }\n  }\n\n  const contextId = context.currentContextIds.find(contextId => {\n    return !!tensorsMap[getNodeNameWithContextId(nodeName, contextId)];\n  });\n\n  return contextId !== undefined ?\n      tensorsMap[getNodeNameWithContextId(nodeName, contextId)][index] :\n      undefined;\n}\n\n/**\n * Retrieve the tensors based on input name for current context.\n * @param name Node input name\n * @param tensorsMap Tensors map keyed by the node\n */\nexport function getTensorsForCurrentContenxt(\n    name: string, tensorsMap: NamedTensorsMap,\n    context: ExecutionContext): Tensor[] {\n  return tensorsMap[getNodeNameWithContextId(name, context.currentContextId)];\n}\n\n/**\n * Returns the node name, outputName and index from the Node input name.\n * @param inputName The input name of the node, in format of\n * node_name:output_index, i.e. MatMul:0, if the output_index is not set, it is\n * default to 0.\n * If the input name contains output name i.e. StringSplit:indices:0, it will\n * return ['StringSplit', 0, 'indices'].\n */\nexport function getNodeNameAndIndex(\n    inputName: string, context?: ExecutionContext): [string, number, string] {\n  const [nodeName, index, outputName] = parseNodeName(inputName);\n\n  return [\n    getNodeNameWithContextId(nodeName, context && context.currentContextId),\n    index, outputName\n  ];\n}\n\nfunction getNodeNameWithContextId(name: string, contextId?: string): string {\n  return !!contextId ? `${name}-${contextId}` : name;\n}\n\nexport function parseNodeName(name: string): [string, number, string] {\n  const parts = name.split(':');\n  if (parts.length === 1) {\n    return [name, 0, undefined];\n  }\n\n  const nodeName = parts[0];\n  const outputName = parts.length === 3 ? parts[1] : undefined;\n  const index = Number(parts[parts.length - 1]);\n  return [nodeName, index, outputName];\n}\n\nexport function split(arr: number[], size: number) {\n  const res = [];\n  for (let i = 0; i < arr.length; i += size) {\n    res.push(arr.slice(i, i + size));\n  }\n  return res;\n}\nexport function getPadding(\n    node: Node, tensorMap: NamedTensorsMap,\n    context: ExecutionContext): ValueType {\n  let pad = getParamValue('pad', node, tensorMap, context);\n  if (pad === 'explicit') {\n    // This is 1d array, we need to convert it to 2d array\n    pad = getParamValue('explicitPaddings', node, tensorMap, context);\n    const explicitPadding: [\n      [number, number], [number, number], [number, number], [number, number]\n    ] = [[0, 0], [0, 0], [0, 0], [0, 0]];\n    for (let i = 0; i < 4; i++) {\n      explicitPadding[i][0] = (pad as number[])[i * 2];\n      explicitPadding[i][1] = (pad as number[])[i * 2 + 1];\n    }\n    return explicitPadding;\n  }\n  return pad;\n}\n\n/**\n *  Reuse the tensor if it is marked as keep, otherwise clone the tensor to\n *  avoid disposal. This is important for TensorArray and TensorList ops, since\n *  internally they use a tensor as the id for TensorArray and TensorList, and\n * to simplify lookup, they also use Tensor.id as the key to the internal map.\n * These id tensors have been marked as kept in the backend, we need avoid clone\n * them in order to create new Tensor.id.\n * @param tensor\n */\nexport function cloneTensor(tensor: Tensor): Tensor {\n  return tensor.kept ? tensor : clone(tensor);\n}\n"]}