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Youtube Always Play in Highest Quality

Always play youtube videos in highest available quality, embedded ones too, everywhere.

当前为 2014-09-13 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Youtube Always Play in Highest Quality
  3. // @description Always play youtube videos in highest available quality, embedded ones too, everywhere.
  4. // @namespace   YAPiHQ
  5. // @include     *
  6. // @run-at      document-start
  7. // @grant       none
  8. // @version     6
  9. // ==/UserScript==
  10.  
  11. //Tested with:
  12. // Firefox 24.0 with Greasemonkey 1.12
  13. // Chrome 30.0 with Tampermonkey  3.5
  14.  
  15. //SETTINGS
  16. //Change default quality level by setting the variable defaultQuality to one of the following values:
  17. //	small, medium, large, hd720, hd1080, highres
  18. // It's set to highres by default.
  19. // More information about the quality levels: https://developers.google.com/youtube/js_api_reference#Playback_quality
  20. var defaultQuality = "highres";
  21. //END OF SETTINGS
  22.  
  23. defaultQuality = verifyDefaultQuality(defaultQuality);
  24.  
  25. //console.log(window.location.href); //DEBUG
  26.  
  27. //On /v/ or /embed/ pages (loaded directly or via an iframe)
  28. if ((/^(https?\:\/\/(www\.)?youtube(-nocookie)?.com\/(v|embed|e)\/[a-zA-Z0-9+\-\_]{11})/).test(window.location.href)){
  29. 	//console.log("v/embed"); //DEBUG
  30. 	var nhref=window.location.href;
  31. 	var nhrefFragId = "";
  32.  
  33. 	//Split url by the the # fragment identifier into two parts for easier handling
  34. 	var rxFid = window.location.href.match(/^(.*?)#/);
  35. 	if (rxFid != null){
  36. 		nhref=rxFid[1];
  37. 		nhrefFragId=window.location.href.replace(nhref,"");
  38. 	}
  39. 	
  40. 	var rxVq = nhref.match(new RegExp("(\\?|\\&)vq=([^&]*)(\\&)?"));
  41. 	//If there is a vq parameter in the url and it's set to the value of defaultQuality, don't do anything
  42. 	if (!(rxVq != null && rxVq[2] === defaultQuality)){
  43. 		if (rxVq != null && rxVq[2] !== defaultQuality)
  44. 		{
  45. 			nhref = nhref.replace(new RegExp("(\\?|\\&)vq=[^&]*(\\&)?"),"$1vq=" +defaultQuality+ "$2");
  46. 		} else if (rxVq == null){
  47. 			nhref = nhref.replace(/^(https?\:\/\/(?:www\.)?youtube(?:-nocookie)?\.com\/(?:v|embed|e)\/[a-zA-Z0-9+\-\_]{11})\??/,"$1?vq=" +defaultQuality + "&");
  48. 		}
  49. 	}
  50. 	
  51. 	var rxAPI = nhref.match(new RegExp("(\\?|\\&)enablejsapi=([^&]*)(\\&)?"));
  52. 	//If there is an enablejsapi parameter in the url and it's set to  1, don't do anything
  53. 	if (!(rxAPI != null && rxAPI[2] === "1")){
  54. 		if (rxAPI != null && rxAPI[2] !== "1")
  55. 		{
  56. 			nhref = nhref.replace(new RegExp("(\\?|\\&)enablejsapi=[^&]*(\\&)?"),"$1enablejsapi=" +"1"+ "$2");
  57. 		} else if (rxAPI == null){
  58. 			nhref = nhref.replace(/^(https?\:\/\/(?:www\.)?youtube(?:-nocookie)?\.com\/(?:v|embed|e)\/[a-zA-Z0-9+\-\_]{11})\??/,"$1?enablejsapi=" + "1" + "&");
  59. 		}
  60. 	}
  61. 	if (nhref+nhrefFragId !== window.location.href)
  62. 		window.location = nhref + nhrefFragId;
  63. 	else {
  64. 		document.addEventListener('DOMContentLoaded', function(){
  65. 			//console.log("embed"); //DEBUG
  66.             var interval = setInterval(function(){
  67.                 var player = document.getElementById("player").childNodes[0];
  68.                 if (player != undefined){
  69.                     if(player.nodeName.toLowerCase() != "embed"){	
  70.                         //console.log("html5 embed"); //DEBUG
  71.                         ensureSetQuality(player);
  72.                     }
  73.                     clearInterval(interval);
  74.                 }
  75. 			},10);
  76. 		}, false);
  77. 	}
  78. //All the other pages
  79. } else {
  80. 	// Continue after the page is fully loaded
  81. 	document.addEventListener('DOMContentLoaded', execOnPageLoad, false);
  82. }
  83.  
  84. function execOnPageLoad(){
  85. 	//console.log("execOnPageLoad"); // DEBUG
  86. 	
  87. 	if ((/^(https?\:\/\/(www\.)?youtube.com\/(watch|user\/|channel\/))/).test(window.location.href)){
  88. 		//console.log("watch"); //DEBUG
  89. 		
  90. 		if (document.getElementById("gm-YAPiHQ") == null){
  91. 			var scr = document.createElement("script");
  92. 			scr.id = "gm-YAPiHQ";
  93. 			scr.innerHTML = 
  94. 				["var tag = document.createElement('script');",
  95. 				"tag.src = '//www.youtube.com/iframe_api';",
  96. 				"var firstScriptTag = document.getElementsByTagName('script')[0];",
  97. 				"firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);",
  98. 				"var ytplayer0;",
  99. 				"function onYouTubePlayerReady(playerId){",
  100. 				//"	console.log('onReady1');", //DEBUG
  101. 				"   ytplayer0 = window.top.document.getElementById('movie_player') || window.top.document.getElementById('movie_player-html5') || window.top.document.getElementById('movie_player-flash') || window.top.document.getElementById('video-player-flash') || window.top.document.getElementById('video-player');",
  102. 				"	ytplayer0.setPlaybackQuality('" + defaultQuality + "');",
  103. 				"	waitSetHQ();",
  104. 				"};",
  105. 				"function ytPlayerOnYouTubePlayerReady(playerId){",
  106. 				//"	console.log('onReady2');", //DEBUG
  107. 				"   ytplayer0 = window.top.document.getElementById('movie_player') || window.top.document.getElementById('movie_player-html5') || window.top.document.getElementById('movie_player-flash') || window.top.document.getElementById('video-player-flash') || window.top.document.getElementById('video-player');",
  108. 				"	ytplayer0.setPlaybackQuality('" + defaultQuality + "');",
  109. 				"	waitSetHQ();",
  110. 				"};",
  111. 				"var c;",
  112. 				"function waitSetHQ(wStart){",
  113. 				//"	console.log('WSHQ');", //DEBUG
  114. 				"	if (wStart==undefined)",
  115. 				"		wStart = new Date();",
  116. 				"   ytplayer0 = window.top.document.getElementById('movie_player') || window.top.document.getElementById('movie_player-html5') || window.top.document.getElementById('movie_player-flash') || window.top.document.getElementById('video-player-flash') || window.top.document.getElementById('video-player');",
  117. 				"  	ytplayer0.setPlaybackQuality('" + defaultQuality + "');",
  118. 				"	if (c==undefined){",
  119. 				//"		console.log(c);", //DEBUG
  120. 				"		c='" + defaultQuality + "';",
  121. 				"		var q = ['small','medium','large','hd720','hd1080','highres'];",
  122. 				"		var avq = ytplayer0.getAvailableQualityLevels();",
  123. 				"		for (var i=q.lastIndexOf('" + defaultQuality + "');i>=0;--i){",
  124. 				"			if (avq.lastIndexOf(q[i]) >= 0){",
  125. 				"				c=q[i];",
  126. 				"				break;",
  127. 				"			}", 
  128. 				"		}",
  129. 				"	}",
  130. 				"	if (c==ytplayer0.getPlaybackQuality()){",
  131. 				//"		console.log(c+' '+ytplayer0.getPlaybackQuality());", //DEBUG
  132. 				"		c=undefined;",
  133. 				"		return;",
  134. 				"   } else if ((new Date())-wStart<10000)",
  135. 				"      setTimeout(function(){waitSetHQ(wStart)},10);",
  136. 				"}",
  137. 				].join('\n');
  138. 			//console.log(scr.innerHTML); // DEBUG
  139. 			document.getElementsByTagName("body")[0].appendChild(scr);
  140. 		}
  141. 		var target = document.getElementById("player");
  142. 		var observer;
  143. 		try {
  144. 			observer = new MutationObserver(waitSetHQ); //Firefox (Gecko)
  145. 		} catch (e){
  146. 			observer = new WebKitMutationObserver(waitSetHQ); //Chrome (WebKit)
  147. 		}
  148. 		var config = { attributes: true, childList: false, characterData: true, subtree: false };
  149. 		observer.observe(target, config); // register observer
  150. 		
  151. 	} else if ((/^(https?\:\/\/(www\.)?youtube.com\/channels)/).test(window.location.href)){
  152. 	
  153. 		var target = document.body;
  154. 		var observer;
  155. 		try {
  156. 			observer = new MutationObserver(onChannelsMutation); //Firefox (Gecko)
  157. 		} catch (e){
  158. 			observer = new WebKitMutationObserver(onChannelsMutation); //Chrome (WebKit)
  159. 		}
  160. 		var config = { attributes: true, childList: true, characterData: true, subtree: true };
  161. 		observer.observe(target, config);
  162. 		
  163. 	//Everywhere else
  164. 	} else {
  165. 		searchAndReplace(); // Look for embedded videos
  166. 		
  167. 		// Keep watching for changes in page content, pass changed/inserted nodes to searchAndReplace()
  168. 		// https://developer.mozilla.org/en-US/docs/DOM/MutationObserver
  169. 		var target = document.body;
  170. 		var observer;
  171. 		try {
  172. 			observer = new MutationObserver(onMutation); //Firefox (Gecko)
  173. 		} catch (e){
  174. 			observer = new WebKitMutationObserver(onMutation); //Chrome (WebKit)
  175. 		}
  176. 		var config = { attributes: true, childList: true, characterData: true, subtree: true };
  177. 		observer.observe(target, config); // register observer
  178. 	}
  179. }
  180.  
  181. //Caller must make sure that videoObj.setPlaybackQuality will be defined at some point, 
  182. // if not, the function will keep calling itself every 100ms on videoObj until the 10s timeout.
  183. function ensureSetQuality(videoObj,highestAQ,firstCalledAt){
  184. 	//console.log("ensureSetQuality()" + firstCalledAt); //DEBUG
  185. 	if (firstCalledAt==undefined)
  186. 		firstCalledAt = new Date();
  187. 	else if ((new Date()-firstCalledAt) > 10000)
  188. 		return;
  189. 	if (typeof(videoObj.setPlaybackQuality) == "function"){
  190. 		videoObj.setPlaybackQuality(defaultQuality);
  191. 		if (videoObj.getPlayerState() == 1 || videoObj.getPlayerState() == 3)
  192. 			videoObj.playVideo(); // to avoid reload glitch after pausing/starting again
  193. 		
  194. 		//Store the defaultQuality or the next highest available quality in highestAQ
  195. 		if (highestAQ==undefined){
  196. 			var q = ["small","medium","large","hd720","hd1080","highres"];
  197. 			for (var i=q.lastIndexOf(defaultQuality);i>=0;--i){
  198. 				if ((videoObj.getAvailableQualityLevels()).lastIndexOf(q[i]) >= 0){
  199. 					highestAQ=q[i];
  200. 					break;
  201. 				} 
  202. 			}
  203. 		}
  204. 		if (videoObj.getPlaybackQuality() != highestAQ){
  205. 			setTimeout(function(){ensureSetQuality(videoObj,highestAQ,firstCalledAt)},100)
  206. 		} 
  207. 	} else
  208. 		setTimeout(function(){ensureSetQuality(videoObj,highestAQ,firstCalledAt)},100);
  209. }
  210.  
  211. function onChannelsMutation(mutations){
  212. 	mutations.forEach(function(mutation) {
  213. 		if (mutation.type === "attributes"){
  214. 			if (mutation.target.nodeName.toLowerCase() == "embed"){
  215. 				if (typeof(mutation.target.setPlaybackQuality == "function")){
  216. 					//console.log("attr hit"); //DEBUG
  217. 					ensureSetQuality(ensureSetQuality);
  218. 				}
  219. 			}
  220. 		} else if (mutation.type === "childList"){
  221. 			for (var i=0;i<mutation.addedNodes.length;++i)
  222. 				if (mutation.addedNodes[i].nodeName.toLowerCase() == "embed"){
  223. 					if (typeof(mutation.addedNodes[i].setPlaybackQuality == "function")){
  224. 						//console.log("added hit"); //DEBUG
  225. 						ensureSetQuality(mutation.addedNodes[i]);
  226. 				}
  227. 			}
  228. 		}
  229. 	});    
  230. }
  231.  
  232. function onMutation(mutations){
  233. 	var significantNodes = [];
  234. 	mutations.forEach(function(mutation) {
  235. 		//console.log(mutation.type); // DEBUG
  236. 		if (mutation.type === "attributes"){
  237. 			significantNodes[significantNodes.length] = mutation.target;
  238. 		} else if (mutation.type === "childList"){
  239. //			console.log("onMutation: childList"); //DEBUG
  240. 			for (var i=0;i<mutation.addedNodes.length;++i)
  241. 				significantNodes[significantNodes.length] = mutation.addedNodes[i];
  242. 		}
  243. 	});    
  244. 	//console.log("significantNodes length: " + significantNodes.length); // DEBUG
  245. 	if (significantNodes.length>0)
  246. 		searchAndReplace(significantNodes);
  247. }
  248.  
  249. function recAddToArr(obj,array){
  250. 	array.push(obj);
  251. }
  252.  
  253. function onMutation(mutations){
  254. 	var significantNodes = [];
  255. 	mutations.forEach(function(mutation) {
  256. 		//console.log(mutation.type); // DEBUG
  257. 		if (mutation.type === "attributes"){
  258. 			significantNodes[significantNodes.length] = mutation.target;
  259. 		} else if (mutation.type === "childList"){
  260. //			console.log("onMutation: childList"); //DEBUG
  261. 			for (var i=0;i<mutation.addedNodes.length;++i)
  262. 				significantNodes[significantNodes.length] = mutation.addedNodes[i];
  263. 		}
  264. 	});    
  265. 	//console.log("significantNodes length: " + significantNodes.length); // DEBUG
  266. 	if (significantNodes.length>0)
  267. 		searchAndReplace(significantNodes);
  268. }
  269.  
  270. function searchAndReplace(pNodes){
  271. //	console.log("searchAndReplace()"); //DEBUG
  272. if (typeof pNodes == "object")	//if searchAndReplace() was called because the page content changed and the function received the changed nodes
  273. 	{
  274. //		console.log("searchAndReplace(pNodes) : " + pNodes.length); // DEBUG
  275. 		for (var i=0;i<pNodes.length;++i){
  276. //			console.log(pNodes[i].nodeName.toLowerCase());
  277. //			console.log(pNodes[i].getElementsByTagName("object").length); //DEBUG
  278. 			
  279. 			if ((/^embed$/i).test(pNodes[i].nodeName)){
  280. //				console.log("embed mutation"); //DEBUG
  281. 				var embedSrc = pNodes[i].getAttribute("src");
  282. 				if (!embedSrc)
  283. 					continue;
  284. //				console.log("embedSrc: " + embedSrc); //DEBUG
  285. 				var replaceUrl = replaceSrc(embedSrc);
  286. 				if (embedSrc != replaceUrl)
  287. 					pNodes[i].setAttribute("src",replaceUrl);
  288. 			} else if ((/^object$/i).test(pNodes[i].nodeName)){
  289. 				var objectData = pNodes[i].getAttribute("data");
  290. 				if (!objectData)
  291. 					continue;
  292. //				console.log("objectData: " + objectData); //DEBUG
  293. 				var replaceUrl = replaceSrc(objectData);
  294. 				if (objectData != replaceUrl)
  295. 					pNodes[i].setAttribute("data",replaceUrl);
  296. 				var objectChildren = pNodes[i].getElementsByTagName("param");
  297. 				for (var j=0;j<objectChildren.length;++j){
  298. 					if (objectChildren[j].getAttribute("name") != "movie")
  299. 						continue;
  300. 					var paramMovie = objectChildren[j].getAttribute("value");
  301. 					if (paramMovie){
  302. //						console.log("paramMovie: " + paramMovie); //DEBUG
  303. 						var replaceUrl = replaceSrc(paramMovie);
  304. 						if (paramMovie != replaceUrl)
  305. 							objectChildren[j].setAttribute("movie",replaceUrl);
  306. 					} // if
  307. 				} // for j
  308. 			} // else if
  309. 		} // for i
  310. 	} else {
  311. 		//console.log("searchAndReplace()"); // DEBUG
  312.  
  313. 		var lElems = new Array();
  314. 		lElems["object"] = "data";
  315. 		lElems["embed"] = "src";
  316. 		lElems["param"] = "value";
  317.  
  318. 		for (var cTag in lElems){
  319. 			var cParam = lElems[cTag];
  320. 			var tagArr = document.getElementsByTagName(cTag);
  321. 			for (var i=0;i<tagArr.length;++i){
  322. 				var tagParam = tagArr[i].getAttribute(cParam);
  323. 				if (!tagParam
  324.                     || (cTag == "param" && tagArr[i].getAttribute("name") != "movie"))
  325. 						continue;
  326. 				var replaceUrl = replaceSrc(tagParam);
  327. 				if (tagParam != replaceUrl)
  328. 					tagArr[i].setAttribute(cParam,replaceUrl);
  329. 			} // for i 
  330. 		} //for key
  331. 	} // else
  332. }
  333.  
  334. function replaceSrc(src){
  335. 	if ((/^(https?\:\/\/(www\.)?youtube(-nocookie)?\.com\/(v|e)\/[a-zA-Z0-9+\-\_]{11})/).test(src)){
  336. 		if ((new RegExp("(\\?|\\&)vq=[^#^&]*(\\#|\\&)?")).test(src))
  337. 			src = src.replace(new RegExp("(\\?|\\&)vq=[^#^&]*(\\#|\\&)?"),"$1vq=" +defaultQuality+ "$2");
  338. 		else 
  339. 			src = src.replace(/^(https?\:\/\/(www\.)?youtube(-nocookie)?\.com\/(v|e)\/[a-zA-Z0-9+\-\_]{11})\??/,"$1?vq=" +defaultQuality + "&");
  340. 	}
  341. 	return src;
  342. }
  343.  
  344. function verifyDefaultQuality(quality){
  345. 	if (["small","medium","large","hd720","hd1080","highres"].indexOf(quality) < 0)
  346. 		return "highres";
  347. 	return quality;
  348. }