/**
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* @fileoverview
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* Utils used by {@class Html5Qrcode} & {@class Html5QrcodeScanner}
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*
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* @author mebjas <minhazav@gmail.com>
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*
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* The word "QR Code" is registered trademark of DENSO WAVE INCORPORATED
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* http://www.denso-wave.com/qrcode/faqpatent-e.html
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*/
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import { Logger } from "./core";
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/**
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* Utils around {@interface MediaTrackConstraints} for video.
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*/
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export class VideoConstraintsUtil {
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public static isMediaStreamConstraintsValid(
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videoConstraints: MediaTrackConstraints,
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logger: Logger): boolean {
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if (typeof videoConstraints !== "object") {
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const typeofVideoConstraints = typeof videoConstraints;
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logger.logError(
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"videoConstraints should be of type object, the "
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+ `object passed is of type ${typeofVideoConstraints}.`,
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/* experimental= */ true);
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return false;
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}
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// TODO(mebjas): Make this validity check more sophisticuated
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// Following keys are audio controls, audio controls are not supported.
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const bannedKeys = [
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"autoGainControl",
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"channelCount",
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"echoCancellation",
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"latency",
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"noiseSuppression",
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"sampleRate",
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"sampleSize",
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"volume"
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];
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const bannedkeysSet = new Set(bannedKeys);
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const keysInVideoConstraints = Object.keys(videoConstraints);
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for (const key of keysInVideoConstraints) {
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if (bannedkeysSet.has(key)) {
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logger.logError(
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`${key} is not supported videoConstaints.`,
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/* experimental= */ true);
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return false;
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}
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}
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return true;
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}
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}
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