90 lines
3.6 KiB
JavaScript
90 lines
3.6 KiB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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import { ZXingHtml5QrcodeDecoder } from "./zxing-html5-qrcode-decoder";
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import { BarcodeDetectorDelegate } from "./native-bar-code-detector";
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export class Html5QrcodeShim {
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constructor(requestedFormats, useBarCodeDetectorIfSupported, verbose, logger) {
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this.EXECUTIONS_TO_REPORT_PERFORMANCE = 100;
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this.executions = 0;
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this.executionResults = [];
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this.wasPrimaryDecoderUsedInLastDecode = false;
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this.verbose = verbose;
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if (useBarCodeDetectorIfSupported
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&& BarcodeDetectorDelegate.isSupported()) {
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this.primaryDecoder = new BarcodeDetectorDelegate(requestedFormats, verbose, logger);
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this.secondaryDecoder = new ZXingHtml5QrcodeDecoder(requestedFormats, verbose, logger);
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}
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else {
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this.primaryDecoder = new ZXingHtml5QrcodeDecoder(requestedFormats, verbose, logger);
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}
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}
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decodeAsync(canvas) {
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return __awaiter(this, void 0, void 0, function* () {
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let startTime = performance.now();
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try {
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return yield this.getDecoder().decodeAsync(canvas);
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}
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finally {
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this.possiblyLogPerformance(startTime);
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}
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});
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}
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decodeRobustlyAsync(canvas) {
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return __awaiter(this, void 0, void 0, function* () {
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let startTime = performance.now();
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try {
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return yield this.primaryDecoder.decodeAsync(canvas);
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}
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catch (error) {
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if (this.secondaryDecoder) {
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return this.secondaryDecoder.decodeAsync(canvas);
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}
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throw error;
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}
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finally {
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this.possiblyLogPerformance(startTime);
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}
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});
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}
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getDecoder() {
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if (!this.secondaryDecoder) {
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return this.primaryDecoder;
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}
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if (this.wasPrimaryDecoderUsedInLastDecode === false) {
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this.wasPrimaryDecoderUsedInLastDecode = true;
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return this.primaryDecoder;
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}
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this.wasPrimaryDecoderUsedInLastDecode = false;
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return this.secondaryDecoder;
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}
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possiblyLogPerformance(startTime) {
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if (!this.verbose) {
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return;
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}
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let executionTime = performance.now() - startTime;
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this.executionResults.push(executionTime);
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this.executions++;
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this.possiblyFlushPerformanceReport();
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}
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possiblyFlushPerformanceReport() {
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if (this.executions < this.EXECUTIONS_TO_REPORT_PERFORMANCE) {
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return;
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}
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let sum = 0;
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for (let executionTime of this.executionResults) {
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sum += executionTime;
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}
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let mean = sum / this.executionResults.length;
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console.log(`${mean} ms for ${this.executionResults.length} last runs.`);
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this.executions = 0;
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this.executionResults = [];
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}
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}
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//# sourceMappingURL=code-decoder.js.map
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