webOS 2.2.4 patch: Fix low YouTube quality; see http://forums.webosnation.com/webos-patches/326010-patch-webos-2-fix-low-youtube-quality.html

webos-youtube-quality-fix.patch

# webOS-2.2.4-v2: Fix low YouTube quality (http://forums.webosnation.com/webos-patches/326010-patch-webos-2-fix-low-youtube-quality.html)

#Copyright (c) 2013, "pcworld", [email protected]
#All rights reserved.
#
#Redistribution and use in source and binary forms, with or without
#modification, are permitted provided that the following conditions are met:
#    * Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
#    * Redistributions in binary form must reproduce the above copyright
#      notice, this list of conditions and the following disclaimer in the
#      documentation and/or other materials provided with the distribution.
#    * Neither the name of the author nor the
#      names of its contributors may be used to endorse or promote products
#      derived from this software without specific prior written permission.
#
#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
#ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
#WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
#DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
#DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
#(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
#LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
#ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
#SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# This patch is based on information found on http://coding-everyday.blogspot.de/2013/03/how-to-grab-youtube-playback-video-files.html and http://userscripts.org/scripts/review/25105

diff -burN com.palm.app.youtube_orig/app/controllers/home-assistant.js com.palm.app.youtube/app/controllers/home-assistant.js
--- /usr/palm/applications/com.palm.app.youtube/app/controllers/home-assistant.js	2011-07-09 02:53:42.000000000 +0200
+++ /usr/palm/applications/com.palm.app.youtube/app/controllers/home-assistant.js	2013-09-08 20:56:49.837472384 +0200
@@ -28,33 +28,86 @@
 			videoId = videoId.substr(0, videoId.indexOf("&"));
 		}
 		
-		Mojo.Log.info ("findme looking up the video");
-		AppAssistant.api.lookupVideo(videoId, 
-			function(video) {
-				Mojo.Log.info ("findme have the id...");
-				if (video) {
-					Mojo.Log.info("Youtube: startYoutube lookupVideo video %j", video);
+		new Ajax.Request("http://www.youtube.com/get_video_info?video_id=" + videoId, {
+			onSuccess: function(resp) {
+				var videoInfo = resp.responseText;
+				var videoInfoSplit = videoInfo.split("&");
+				var streams, title, thumbnail;
+				for (var i = 0; i < videoInfo.length; i++) {
+					var paramPair = videoInfoSplit[i].split("=");
+					if (paramPair[0] === "url_encoded_fmt_stream_map") {
+						streams = decodeURIComponent(paramPair[1]);
+					} else if (paramPair[0] === "title") {
+						title = decodeURIComponent(paramPair[1]).replace(/\+/g, " ");
+					} else if (paramPair[0] === "iurl") { // for higher quality, use "iurlsd" or even "iurlmaxres"
+						thumbnail = decodeURIComponent(paramPair[1]);
+					}
 					
-					//If launch parameter direct set to true then launch video directly
-					if (this.appIsRunning) {
-							AppAssistant.myStageController.activate();
+					if (streams && title && thumbnail)
+						break;
+				}
+				
+				if (!streams) {
+					var msg = "YouTube videoInfo parsing: url_encoded_fmt_stream_map not found";
+					Mojo.Log.error(msg);
+					this.closeWindowDialogue(msg);
+					return;
+				}
+				streamsSplit = streams.split("&");
+				
+				// some lines contain two value pairs separated by comma
+				var newSplit = [];
+				for (var i = 0; i < streamsSplit.length; i++) {
+					var secondSplit = streamsSplit[i].split(",");
+					newSplit.push.apply(newSplit, secondSplit);
 						}
+				streamsSplit = newSplit;
 						
+				var url, sig, itag;
+				var found = false;
+				for (var i = 0; i < streamsSplit.length; i++) {
+					var paramPair = streamsSplit[i].split("=");
+					if (paramPair[0] === "url") {
+						url = decodeURIComponent(paramPair[1]);
+					} else if (paramPair[0] === "sig") {
+						sig = paramPair[1]; // do not decode, as we would have to encode it later (although decoding/encoding has currently no effect for the signature)
+					} else if (paramPair[0] === "itag") {
+						itag = paramPair[1];
+					}
+					if ((i + 1) % 6 === 0 && itag === "18") { // 6 parameters per video; itag 18 is "MP4 360p", see http://userscripts.org/scripts/review/25105
+						found = true;
+						url += "&signature=" + sig;
+						break;
+					}
+				}
 						
-					this.foundVideo(video);
-					//AppAssistant.common.playVideo(video);
+				// Palm Code: "If launch parameter direct set to true then launch video directly"
+				if (this.appIsRunning) {
+					AppAssistant.myStageController.activate();
 				}
-				else {
-					Mojo.Log.error("Youtube:invalid video found");
-					this.closeWindowDialogue();
-					//window.close();
+				
+				if (found) {
+					Mojo.Log.info("video direct URL found: " + url);
+					this.foundVideo({
+						link: url,
+						title: title,
+						thumbnail_240_320: thumbnail
+					});
+				} else {
+					var msg = "Couldn't find video in MP4 360p";
+					Mojo.Log.error(msg);
+					this.closeWindowDialogue(msg);
+					return;
 				}
 			}.bind(this), 
-			function(err) {
-				Mojo.Log.error("Youtube: startYoutube lookupVideo failed FUNCTION %s", err);
-				this.closeWindowDialogue();
-				//window.close();
-			}.bind(this));
+			
+			onFailure: function() {
+				var msg = "requesting get_video_info failed";
+				Mojo.Log.error(msg);
+				this.closeWindowDialogue(msg);
+				return;
+			}.bind(this)
+		});
 	},
 	
 	foundVideo: function(video){