73 lines
2.2 KiB
TypeScript
73 lines
2.2 KiB
TypeScript
// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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import {flatbuffers} from 'flatbuffers';
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import {onnx} from 'onnx-proto';
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import {Graph} from './graph';
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import {OpSet} from './opset';
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import {onnxruntime} from './ort-schema/ort-generated';
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import {LongUtil} from './util';
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import ortFbs = onnxruntime.experimental.fbs;
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export class Model {
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// empty model
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constructor() {}
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load(buf: Uint8Array, graphInitializer?: Graph.Initializer, isOrtFormat?: boolean): void {
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if (!isOrtFormat) {
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// isOrtFormat === false || isOrtFormat === undefined
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try {
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this.loadFromOnnxFormat(buf, graphInitializer);
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return;
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} catch (e) {
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if (isOrtFormat !== undefined) {
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throw e;
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}
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}
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}
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this.loadFromOrtFormat(buf, graphInitializer);
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}
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private loadFromOnnxFormat(buf: Uint8Array, graphInitializer?: Graph.Initializer): void {
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const modelProto = onnx.ModelProto.decode(buf);
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const irVersion = LongUtil.longToNumber(modelProto.irVersion);
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if (irVersion < 3) {
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throw new Error('only support ONNX model with IR_VERSION>=3');
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}
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this._opsets =
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modelProto.opsetImport.map(i => ({domain: i.domain as string, version: LongUtil.longToNumber(i.version!)}));
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this._graph = Graph.from(modelProto.graph!, graphInitializer);
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}
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private loadFromOrtFormat(buf: Uint8Array, graphInitializer?: Graph.Initializer): void {
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const fb = new flatbuffers.ByteBuffer(buf);
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const ortModel = ortFbs.InferenceSession.getRootAsInferenceSession(fb).model()!;
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const irVersion = LongUtil.longToNumber(ortModel.irVersion());
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if (irVersion < 3) {
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throw new Error('only support ONNX model with IR_VERSION>=3');
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}
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this._opsets = [];
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for (let i = 0; i < ortModel.opsetImportLength(); i++) {
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const opsetId = ortModel.opsetImport(i)!;
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this._opsets.push({domain: opsetId?.domain() as string, version: LongUtil.longToNumber(opsetId.version()!)});
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}
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this._graph = Graph.from(ortModel.graph()!, graphInitializer);
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}
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private _graph: Graph;
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get graph(): Graph {
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return this._graph;
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}
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private _opsets: OpSet[];
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get opsets(): readonly OpSet[] {
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return this._opsets;
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}
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}
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