@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, SparseReshape, util } from '@tensorflow/tfjs-core';
let wasmSparseReshape;
function setup(backend) {
wasmSparseReshape = backend.wasm.cwrap(SparseReshape, null /*void*/, [
'number',
'number',
'number',
'number',
'number',
'number',
'number', // exceptionValuesId
]);
}
function sparseReshape(args) {
const { backend, inputs } = args;
const { inputIndices, inputShape, newShape } = inputs;
if (inputIndices.shape.length !== 2) {
throw new Error(`Input indices should be a matrix but received shape
${inputIndices.shape}`);
}
if (inputShape.shape.length !== 1) {
throw new Error(`Input shape should be a vector but received shape
${inputShape.shape}`);
}
if (newShape.shape.length !== 1) {
throw new Error(`Target shape should be a vector but received shape ${newShape.shape}`);
}
const inputIndicesId = backend.dataIdMap.get(inputIndices.dataId).id;
const inputShapeId = backend.dataIdMap.get(inputShape.dataId).id;
const newShapeId = backend.dataIdMap.get(newShape.dataId).id;
const nnz = inputIndices.shape[0];
const outputRank = util.sizeFromShape(newShape.shape);
const newIndices = backend.makeOutput([nnz, outputRank], inputIndices.dtype);
const newIndicesId = backend.dataIdMap.get(newIndices.dataId).id;
const outputShape = backend.makeOutput([outputRank], newShape.dtype);
const outputShapeId = backend.dataIdMap.get(outputShape.dataId).id;
const exceptionValues = backend.makeOutput([3], 'int32');
const exceptionValuesId = backend.dataIdMap.get(exceptionValues.dataId).id;
wasmSparseReshape(inputIndicesId, inputShapeId, newShapeId, nnz, newIndicesId, outputShapeId, exceptionValuesId);
const exceptionValuesArray = backend.readSync(exceptionValues.dataId);
let exceptionMessage;
switch (exceptionValuesArray[0]) {
case 0: {
exceptionMessage =
backend_util.getSparseReshapeMultipleNegativeOneOutputDimErrorMessage(exceptionValuesArray[1], exceptionValuesArray[2]);
break;
}
case 1: {
exceptionMessage =
backend_util.getSparseReshapeNegativeOutputDimErrorMessage(exceptionValuesArray[1], exceptionValuesArray[2]);
break;
}
case 2:
exceptionMessage =
backend_util.getSparseReshapeEmptyTensorZeroOutputDimErrorMessage();
break;
case 3: {
const inputShapeValues = Array.from(backend.readSync(inputShape.dataId)), outputShapeValues = Array.from(backend.readSync(outputShape.dataId));
exceptionMessage =
backend_util.getSparseReshapeInputOutputMultipleErrorMessage(inputShapeValues, outputShapeValues);
break;
}
case 4: {
const inputShapeValues = Array.from(backend.readSync(inputShape.dataId)), outputShapeValues = Array.from(backend.readSync(outputShape.dataId));
exceptionMessage =
backend_util.getSparseReshapeInputOutputMismatchErrorMessage(inputShapeValues, outputShapeValues);
break;
}
default:
exceptionMessage = '';
}
backend.disposeData(exceptionValues.dataId);
if (exceptionMessage) {
backend.disposeData(newIndices.dataId);
backend.disposeData(outputShape.dataId);
throw new Error(exceptionMessage);
}
return [newIndices, outputShape];
}
export const sparseReshapeConfig = {
kernelName: SparseReshape,
backendName: 'wasm',
setupFunc: setup,
kernelFunc: sparseReshape
};
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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, SparseReshape, SparseReshapeInputs, TensorInfo, util} from '@tensorflow/tfjs-core';\n\nimport {BackendWasm} from '../backend_wasm';\n\nlet wasmSparseReshape: (\n    inputIndicesId: number, inputShapeId: number, newShapeId: number,\n    nnz: number, newIndicesId: number, outputShapeId: number,\n    exceptionValuesId: number) => void;\n\nfunction setup(backend: BackendWasm): void {\n  wasmSparseReshape = backend.wasm.cwrap(SparseReshape, null /*void*/, [\n    'number',  // inputIndicesId\n    'number',  // inputShapeId\n    'number',  // newShapeId\n    'number',  // nnz\n    'number',  // newIndicesId\n    'number',  // outputShapeId\n    'number',  // exceptionValuesId\n  ]);\n}\n\nfunction sparseReshape(args: {\n  backend: BackendWasm,\n  inputs: SparseReshapeInputs,\n}): [TensorInfo, TensorInfo] {\n  const {backend, inputs} = args;\n  const {inputIndices, inputShape, newShape} = inputs;\n\n  if (inputIndices.shape.length !== 2) {\n    throw new Error(`Input indices should be a matrix but received shape\n        ${inputIndices.shape}`);\n  }\n  if (inputShape.shape.length !== 1) {\n    throw new Error(`Input shape should be a vector but received shape\n        ${inputShape.shape}`);\n  }\n  if (newShape.shape.length !== 1) {\n    throw new Error(\n        `Target shape should be a vector but received shape ${newShape.shape}`);\n  }\n\n  const inputIndicesId = backend.dataIdMap.get(inputIndices.dataId).id;\n  const inputShapeId = backend.dataIdMap.get(inputShape.dataId).id;\n  const newShapeId = backend.dataIdMap.get(newShape.dataId).id;\n\n  const nnz = inputIndices.shape[0];\n  const outputRank = util.sizeFromShape(newShape.shape);\n\n  const newIndices = backend.makeOutput([nnz, outputRank], inputIndices.dtype);\n  const newIndicesId = backend.dataIdMap.get(newIndices.dataId).id;\n\n  const outputShape = backend.makeOutput([outputRank], newShape.dtype);\n  const outputShapeId = backend.dataIdMap.get(outputShape.dataId).id;\n\n  const exceptionValues = backend.makeOutput([3], 'int32');\n  const exceptionValuesId = backend.dataIdMap.get(exceptionValues.dataId).id;\n\n  wasmSparseReshape(\n      inputIndicesId, inputShapeId, newShapeId, nnz, newIndicesId,\n      outputShapeId, exceptionValuesId);\n\n  const exceptionValuesArray =\n      backend.readSync(exceptionValues.dataId) as Int32Array;\n\n  let exceptionMessage: string;\n  switch (exceptionValuesArray[0]) {\n    case 0: {\n      exceptionMessage =\n          backend_util.getSparseReshapeMultipleNegativeOneOutputDimErrorMessage(\n              exceptionValuesArray[1], exceptionValuesArray[2]);\n      break;\n    }\n    case 1: {\n      exceptionMessage =\n          backend_util.getSparseReshapeNegativeOutputDimErrorMessage(\n              exceptionValuesArray[1], exceptionValuesArray[2]);\n      break;\n    }\n    case 2:\n      exceptionMessage =\n          backend_util.getSparseReshapeEmptyTensorZeroOutputDimErrorMessage();\n      break;\n    case 3: {\n      const inputShapeValues =\n          Array.from(backend.readSync(inputShape.dataId) as Int32Array),\n            outputShapeValues =\n                Array.from(backend.readSync(outputShape.dataId) as Int32Array);\n      exceptionMessage =\n          backend_util.getSparseReshapeInputOutputMultipleErrorMessage(\n              inputShapeValues, outputShapeValues);\n      break;\n    }\n    case 4: {\n      const inputShapeValues =\n          Array.from(backend.readSync(inputShape.dataId) as Int32Array),\n            outputShapeValues =\n                Array.from(backend.readSync(outputShape.dataId) as Int32Array);\n      exceptionMessage =\n          backend_util.getSparseReshapeInputOutputMismatchErrorMessage(\n              inputShapeValues, outputShapeValues);\n      break;\n    }\n    default:\n      exceptionMessage = '';\n  }\n\n  backend.disposeData(exceptionValues.dataId);\n  if (exceptionMessage) {\n    backend.disposeData(newIndices.dataId);\n    backend.disposeData(outputShape.dataId);\n    throw new Error(exceptionMessage);\n  }\n\n  return [newIndices, outputShape];\n}\n\nexport const sparseReshapeConfig: KernelConfig = {\n  kernelName: SparseReshape,\n  backendName: 'wasm',\n  setupFunc: setup,\n  kernelFunc: sparseReshape as unknown as KernelFunc\n};\n"]}