81 lines
3.0 KiB
TypeScript
81 lines
3.0 KiB
TypeScript
/**
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* Copyright 2022 The MediaPipe Authors. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import {InferenceCalculatorOptions} from '../../../../calculators/tensor/inference_calculator_pb';
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import {Acceleration} from '../../../../tasks/cc/core/proto/acceleration_pb';
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import {BaseOptions as BaseOptionsProto} from '../../../../tasks/cc/core/proto/base_options_pb';
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import {ExternalFile} from '../../../../tasks/cc/core/proto/external_file_pb';
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import {BaseOptions} from '../../../../tasks/web/core/task_runner_options';
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// The OSS JS API does not support the builder pattern.
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// tslint:disable:jspb-use-builder-pattern
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/**
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* Converts a BaseOptions API object to its Protobuf representation.
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* @throws If neither a model assset path or buffer is provided
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*/
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export async function convertBaseOptionsToProto(
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updatedOptions: BaseOptions,
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currentOptions?: BaseOptionsProto): Promise<BaseOptionsProto> {
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const result =
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currentOptions ? currentOptions.clone() : new BaseOptionsProto();
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await configureExternalFile(updatedOptions, result);
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configureAcceleration(updatedOptions, result);
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return result;
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}
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/**
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* Configues the `externalFile` option and validates that a single model is
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* provided.
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*/
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async function configureExternalFile(
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options: BaseOptions, proto: BaseOptionsProto) {
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const externalFile = proto.getModelAsset() || new ExternalFile();
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proto.setModelAsset(externalFile);
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if (options.modelAssetPath || options.modelAssetBuffer) {
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if (options.modelAssetPath && options.modelAssetBuffer) {
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throw new Error(
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'Cannot set both baseOptions.modelAssetPath and baseOptions.modelAssetBuffer');
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}
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let modelAssetBuffer = options.modelAssetBuffer;
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if (!modelAssetBuffer) {
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const response = await fetch(options.modelAssetPath!.toString());
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modelAssetBuffer = new Uint8Array(await response.arrayBuffer());
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}
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externalFile.setFileContent(modelAssetBuffer);
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}
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if (!externalFile.hasFileContent()) {
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throw new Error(
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'Either baseOptions.modelAssetPath or baseOptions.modelAssetBuffer must be set');
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}
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}
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/** Configues the `acceleration` option. */
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function configureAcceleration(options: BaseOptions, proto: BaseOptionsProto) {
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const acceleration = proto.getAcceleration() ?? new Acceleration();
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if (options.delegate === 'GPU') {
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acceleration.setGpu(new InferenceCalculatorOptions.Delegate.Gpu());
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} else {
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acceleration.setTflite(new InferenceCalculatorOptions.Delegate.TfLite());
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}
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proto.setAcceleration(acceleration);
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}
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