@tensorflow/tfjs-backend-wasm
Version:
This package adds a WebAssembly backend to TensorFlow.js. It currently supports the following models from our [models](https://github.com/tensorflow/tfjs-models) repo: - BlazeFace - BodyPix - CocoSSD - Face landmarks detection - HandPose - KNN classifier
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JavaScript
/**
* @license
* Copyright 2021 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, SparseFillEmptyRows } from '@tensorflow/tfjs-core';
import { slice } from './Slice';
import { CppDType } from './types';
let wasmSparseFillEmptyRows;
export function setup(backend) {
wasmSparseFillEmptyRows =
backend.wasm.cwrap('SparseFillEmptyRows', 'number', [
'number',
'number',
'number',
'number',
'number',
'number',
'number',
'number',
'number',
'number',
'number',
'number', // exceptionValuesId
]);
}
export function sparseFillEmptyRows(args) {
const { backend, inputs } = args;
const { indices, values, denseShape, defaultValue } = inputs;
const indicesCount = indices.shape[0];
const rank = indices.shape[1];
const denseRows = backend.readSync(denseShape.dataId)[0];
// Set output size to maximum possible and resize later (actual result
// might be smaller).
const maxOutputIndicesShape = [indicesCount + denseRows, rank];
const indicesId = backend.dataIdMap.get(indices.dataId).id;
const valuesId = backend.dataIdMap.get(values.dataId).id;
const defaultValueId = backend.dataIdMap.get(defaultValue.dataId).id;
const outputIndices = backend.makeOutput(maxOutputIndicesShape, indices.dtype);
const outputIndicesId = backend.dataIdMap.get(outputIndices.dataId).id;
const outputValues = backend.makeOutput(maxOutputIndicesShape.slice(0, 1), values.dtype);
const outputValuesId = backend.dataIdMap.get(outputValues.dataId).id;
const emptyRowIndicator = backend.makeOutput([denseRows], 'bool');
const emptyRowIndicatorId = backend.dataIdMap.get(emptyRowIndicator.dataId).id;
const reverseIndexMap = backend.makeOutput([indicesCount], indices.dtype);
const reverseIndexMapId = backend.dataIdMap.get(reverseIndexMap.dataId).id;
const exceptionValues = backend.makeOutput([4], 'int32');
const exceptionValuesId = backend.dataIdMap.get(exceptionValues.dataId).id;
const outputRows = wasmSparseFillEmptyRows(indicesId, valuesId, CppDType[values.dtype], indicesCount, denseRows, rank, defaultValueId, outputIndicesId, outputValuesId, emptyRowIndicatorId, reverseIndexMapId, exceptionValuesId);
const exceptionValuesArray = backend.readSync(exceptionValues.dataId);
let exceptionMessage;
switch (exceptionValuesArray[0]) {
case 1: {
exceptionMessage =
backend_util.getSparseFillEmptyRowsIndicesDenseShapeMismatch(exceptionValuesArray[1]);
break;
}
case 2: {
exceptionMessage =
backend_util.getSparseFillEmptyRowsNegativeIndexErrorMessage(exceptionValuesArray[1], exceptionValuesArray[2]);
break;
}
case 3:
exceptionMessage =
backend_util.getSparseFillEmptyRowsOutOfRangeIndexErrorMessage(exceptionValuesArray[1], exceptionValuesArray[2], exceptionValuesArray[3]);
break;
default:
exceptionMessage = '';
}
backend.disposeData(exceptionValues.dataId);
if (exceptionMessage) {
backend.disposeData(outputIndices.dataId);
backend.disposeData(outputValues.dataId);
backend.disposeData(emptyRowIndicator.dataId);
backend.disposeData(reverseIndexMap.dataId);
throw new Error(exceptionMessage);
}
let resizedIndices = outputIndices;
let resizedValues = outputValues;
// Overestimated output size.
if (outputRows !== maxOutputIndicesShape[0]) {
resizedIndices = slice({
inputs: { x: outputIndices },
attrs: { begin: 0, size: [outputRows, rank] },
backend
});
resizedValues = slice({
inputs: { x: outputValues },
attrs: { begin: 0, size: outputRows },
backend
});
backend.disposeData(outputIndices.dataId);
backend.disposeData(outputValues.dataId);
}
return [resizedIndices, resizedValues, emptyRowIndicator, reverseIndexMap];
}
export const sparseFillEmptyRowsConfig = {
kernelName: SparseFillEmptyRows,
backendName: 'wasm',
setupFunc: setup,
kernelFunc: sparseFillEmptyRows
};
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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 {backend_util, KernelConfig, KernelFunc, SparseFillEmptyRows, SparseFillEmptyRowsInputs, TensorInfo} from '@tensorflow/tfjs-core';\n\nimport {BackendWasm} from '../backend_wasm';\nimport {slice} from './Slice';\n\nimport {CppDType} from './types';\n\nlet wasmSparseFillEmptyRows: (\n    indicesId: number, valuesId: number, valuesDType: number,\n    indicesCount: number, denseRows: number, rank: number,\n    defaultValueId: number, outputIndicesId: number, outputValuesId: number,\n    emptyRowIndicatorId: number, reverseIndexMapId: number,\n    exceptionValuesId: number) => number;\n\nexport function setup(backend: BackendWasm): void {\n  wasmSparseFillEmptyRows =\n      backend.wasm.cwrap('SparseFillEmptyRows', 'number', [\n        'number',  // indicesId\n        'number',  // valuesId\n        'number',  // valuesDType\n        'number',  // indicesCount\n        'number',  // denseRows\n        'number',  // rank\n        'number',  // defaultValueId\n        'number',  // outputIndicesId\n        'number',  // outputValuesId\n        'number',  // emptyRowIndicatorId\n        'number',  // reverseIndexMapId\n        'number',  // exceptionValuesId\n      ]);\n}\n\nexport function sparseFillEmptyRows(args: {\n  backend: BackendWasm,\n  inputs: SparseFillEmptyRowsInputs,\n}): [TensorInfo, TensorInfo, TensorInfo, TensorInfo] {\n  const {backend, inputs} = args;\n  const {indices, values, denseShape, defaultValue} = inputs;\n\n  const indicesCount = indices.shape[0];\n  const rank = indices.shape[1];\n  const denseRows = backend.readSync(denseShape.dataId)[0] as number;\n\n  // Set output size to maximum possible and resize later (actual result\n  // might be smaller).\n  const maxOutputIndicesShape = [indicesCount + denseRows, rank];\n\n  const indicesId = backend.dataIdMap.get(indices.dataId).id;\n  const valuesId = backend.dataIdMap.get(values.dataId).id;\n  const defaultValueId = backend.dataIdMap.get(defaultValue.dataId).id;\n\n  const outputIndices =\n      backend.makeOutput(maxOutputIndicesShape, indices.dtype);\n  const outputIndicesId = backend.dataIdMap.get(outputIndices.dataId).id;\n\n  const outputValues =\n      backend.makeOutput(maxOutputIndicesShape.slice(0, 1), values.dtype);\n  const outputValuesId = backend.dataIdMap.get(outputValues.dataId).id;\n\n  const emptyRowIndicator = backend.makeOutput([denseRows], 'bool');\n  const emptyRowIndicatorId =\n      backend.dataIdMap.get(emptyRowIndicator.dataId).id;\n\n  const reverseIndexMap = backend.makeOutput([indicesCount], indices.dtype);\n  const reverseIndexMapId = backend.dataIdMap.get(reverseIndexMap.dataId).id;\n\n  const exceptionValues = backend.makeOutput([4], 'int32');\n  const exceptionValuesId = backend.dataIdMap.get(exceptionValues.dataId).id;\n\n  const outputRows = wasmSparseFillEmptyRows(\n      indicesId, valuesId, CppDType[values.dtype], indicesCount, denseRows,\n      rank, defaultValueId, outputIndicesId, outputValuesId,\n      emptyRowIndicatorId, reverseIndexMapId, exceptionValuesId);\n\n  const exceptionValuesArray =\n      backend.readSync(exceptionValues.dataId) as Int32Array;\n\n  let exceptionMessage: string;\n  switch (exceptionValuesArray[0]) {\n    case 1: {\n      exceptionMessage =\n          backend_util.getSparseFillEmptyRowsIndicesDenseShapeMismatch(\n              exceptionValuesArray[1]);\n      break;\n    }\n    case 2: {\n      exceptionMessage =\n          backend_util.getSparseFillEmptyRowsNegativeIndexErrorMessage(\n              exceptionValuesArray[1], exceptionValuesArray[2]);\n      break;\n    }\n    case 3:\n      exceptionMessage =\n          backend_util.getSparseFillEmptyRowsOutOfRangeIndexErrorMessage(\n              exceptionValuesArray[1], exceptionValuesArray[2],\n              exceptionValuesArray[3]);\n      break;\n    default:\n      exceptionMessage = '';\n  }\n\n  backend.disposeData(exceptionValues.dataId);\n  if (exceptionMessage) {\n    backend.disposeData(outputIndices.dataId);\n    backend.disposeData(outputValues.dataId);\n    backend.disposeData(emptyRowIndicator.dataId);\n    backend.disposeData(reverseIndexMap.dataId);\n    throw new Error(exceptionMessage);\n  }\n\n  let resizedIndices = outputIndices;\n  let resizedValues = outputValues;\n  // Overestimated output size.\n  if (outputRows !== maxOutputIndicesShape[0]) {\n    resizedIndices = slice({\n      inputs: {x: outputIndices},\n      attrs: {begin: 0, size: [outputRows, rank]},\n      backend\n    });\n    resizedValues = slice({\n      inputs: {x: outputValues},\n      attrs: {begin: 0, size: outputRows},\n      backend\n    });\n    backend.disposeData(outputIndices.dataId);\n    backend.disposeData(outputValues.dataId);\n  }\n\n  return [resizedIndices, resizedValues, emptyRowIndicator, reverseIndexMap];\n}\n\nexport const sparseFillEmptyRowsConfig: KernelConfig = {\n  kernelName: SparseFillEmptyRows,\n  backendName: 'wasm',\n  setupFunc: setup,\n  kernelFunc: sparseFillEmptyRows as unknown as KernelFunc\n};\n"]}