tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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MediaUtils.sys.mjs (2051B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
      3 * You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 export const MediaUtils = {
      6  getMetadata(aElement) {
      7    if (!aElement) {
      8      return null;
      9    }
     10    return {
     11      src: aElement.currentSrc ?? aElement.src,
     12      width: aElement.videoWidth ?? 0,
     13      height: aElement.videoHeight ?? 0,
     14      duration: aElement.duration,
     15      seekable: !!aElement.seekable,
     16      audioTrackCount:
     17        (aElement.audioTracks?.length ??
     18        aElement.mozHasAudio ??
     19        aElement.webkitAudioDecodedByteCount ??
     20        MediaUtils.isAudioElement(aElement))
     21          ? 1
     22          : 0,
     23      videoTrackCount:
     24        (aElement.videoTracks?.length ?? MediaUtils.isVideoElement(aElement))
     25          ? 1
     26          : 0,
     27    };
     28  },
     29 
     30  isVideoElement(aElement) {
     31    return (
     32      aElement && ChromeUtils.getClassName(aElement) === "HTMLVideoElement"
     33    );
     34  },
     35 
     36  isAudioElement(aElement) {
     37    return (
     38      aElement && ChromeUtils.getClassName(aElement) === "HTMLAudioElement"
     39    );
     40  },
     41 
     42  isMediaElement(aElement) {
     43    return (
     44      MediaUtils.isVideoElement(aElement) || MediaUtils.isAudioElement(aElement)
     45    );
     46  },
     47 
     48  findMediaElement(aElement) {
     49    return (
     50      MediaUtils.findVideoElement(aElement) ??
     51      MediaUtils.findAudioElement(aElement)
     52    );
     53  },
     54 
     55  findVideoElement(aElement) {
     56    if (!aElement) {
     57      return null;
     58    }
     59    if (MediaUtils.isVideoElement(aElement)) {
     60      return aElement;
     61    }
     62    const childrenMedia = aElement.getElementsByTagName("video");
     63    if (childrenMedia && childrenMedia.length) {
     64      return childrenMedia[0];
     65    }
     66    return null;
     67  },
     68 
     69  findAudioElement(aElement) {
     70    if (!aElement || MediaUtils.isAudioElement(aElement)) {
     71      return aElement;
     72    }
     73    const childrenMedia = aElement.getElementsByTagName("audio");
     74    if (childrenMedia && childrenMedia.length) {
     75      return childrenMedia[0];
     76    }
     77    return null;
     78  },
     79 };