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MSE Dump Tools

Media Source Extensions API 数据 Dump 工具

当前为 2021-11-30 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         MSE Dump Tools
  3. // @namespace    CloudMoeMediaSourceExtensionsAPIDataDumper
  4. // @version      1.4.0
  5. // @description  Media Source Extensions API 数据 Dump 工具
  6. // @author       TGSAN
  7. // @include      /.*/
  8. // @run-at       document-start
  9. // @grant        GM_unregisterMenuCommand
  10. // @grant        GM_registerMenuCommand
  11. // @grant        unsafeWindow
  12. // ==/UserScript==
  13.  
  14. (function () {
  15.     'use strict';
  16.  
  17.     GM_registerMenuCommand(`视频 - 最快播放速度`, function () { document.getElementsByTagName("video")[0].playbackRate = 16 });
  18.     GM_registerMenuCommand(`视频 - 恢复播放速度`, function () { document.getElementsByTagName("video")[0].playbackRate = 1 });
  19.     GM_registerMenuCommand(`音频 - 最快播放速度`, function () { document.getElementsByTagName("audio")[0].playbackRate = 16 });
  20.     GM_registerMenuCommand(`音频 - 恢复播放速度`, function () { document.getElementsByTagName("audio")[0].playbackRate = 1 });
  21.     GM_registerMenuCommand(`结束Dump`, EndAllDumpTasks);
  22.  
  23.     var dumpEndTasks = [];
  24.  
  25.     function dateFormat(dataObj, fmt) {
  26.         var o = {
  27.             "M+": dataObj.getMonth() + 1,               //月份
  28.             "d+": dataObj.getDate(),                    //日
  29.             "h+": dataObj.getHours(),                   //小时
  30.             "m+": dataObj.getMinutes(),                 //分
  31.             "s+": dataObj.getSeconds(),                 //秒
  32.             "q+": Math.floor((dataObj.getMonth() + 3) / 3), //季度
  33.             "S": dataObj.getMilliseconds()             //毫秒
  34.         };
  35.         if (/(y+)/.test(fmt)) {
  36.             fmt = fmt.replace(RegExp.$1, (dataObj.getFullYear() + "").substr(4 - RegExp.$1.length));
  37.         }
  38.         for (var k in o) {
  39.             if (new RegExp("(" + k + ")").test(fmt)) {
  40.                 fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
  41.             }
  42.         }
  43.         return fmt;
  44.     }
  45.  
  46.     function EndAllDumpTasks() {
  47.         while (dumpEndTasks.length > 0) {
  48.             let endTask = dumpEndTasks.shift();
  49.             endTask();
  50.         }
  51.     }
  52.  
  53.     unsafeWindow.SavedDataList = [];
  54.  
  55.     unsafeWindow.DownloadData = function (dataKey, fileName) {
  56.         const link = document.createElement('a');
  57.         link.href = URL.createObjectURL(new Blob([unsafeWindow.SavedDataList[dataKey]]));
  58.         link.download = fileName;
  59.         link.click();
  60.         window.URL.revokeObjectURL(link.href);
  61.     }
  62.  
  63.     function DownloadDataCmd(key, type, date) {
  64.         var ext = "bin";
  65.         if (type == "audio") {
  66.             ext = "m4a";
  67.         } else if (type == "video") {
  68.             ext = "mp4";
  69.         }
  70.         DownloadData(key, "dumped_" + type + "_" + dateFormat(date, "yyyyMMddhhmmss") + "." + ext);
  71.     }
  72.  
  73.     function Uint8ArrayConcat(a, b) {
  74.         var c = new Uint8Array(a.length + b.length);
  75.         c.set(a);
  76.         c.set(b, a.length);
  77.         return c;
  78.     }
  79.  
  80.     function BytesToSize(bytes) {
  81.         if (bytes === 0) return '0 B';
  82.         var k = 1024;
  83.         var sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
  84.         var i = Math.floor(Math.log(bytes) / Math.log(k));
  85.         return (bytes / Math.pow(k, i)).toPrecision(3) + ' ' + sizes[i];
  86.     }
  87.  
  88.     var _addSourceBuffer = unsafeWindow.MediaSource.prototype.addSourceBuffer;
  89.     unsafeWindow.MediaSource.prototype.addSourceBuffer = function (mime) {
  90.         console.log("MediaSource addSourceBuffer Type: ", mime);
  91.         var sourceBuffer = _addSourceBuffer.call(this, mime);
  92.         var _append = sourceBuffer.appendBuffer;
  93.         var endToSave = false;
  94.         var sourceBufferData = new Uint8Array();
  95.         var isVideo = (mime.startsWith("audio") ? false : true);
  96.         var type = (isVideo ? "video" : "audio");
  97.         var key = type + "_" + window.performance.now().toString();
  98.         var startDate = new Date();
  99.         dumpEndTasks.push(() => {
  100.             endToSave = true;
  101.             console.warn(`轨道： ${mime} 已结束保存。`);
  102.             unsafeWindow.SavedDataList[key] = sourceBufferData;
  103.             let downloadCaption = `下载${(isVideo ? "视频" : "音频")}数据 (${BytesToSize(sourceBufferData.length)}, at ${dateFormat(startDate, "yyyy/MM/dd hh:mm:ss")})`;
  104.             GM_registerMenuCommand(downloadCaption, () => { DownloadDataCmd(key, type, startDate); });
  105.         });
  106.         sourceBuffer.appendBuffer = function (buffer) {
  107.             if (!endToSave) {
  108.                 sourceBufferData = Uint8ArrayConcat(sourceBufferData, new Uint8Array(buffer));
  109.             }
  110.             _append.call(this, buffer);
  111.         }
  112.         return sourceBuffer;
  113.     }
  114.  
  115. })();