Use Universal Mask for Qmc,Mgg,Mflac

Add Local Experimental Support For Mgg

src/decrypt/util.js

@@ -1,7 +1,13 @@
-export {GetArrayBuffer, GetFileInfo, GetCoverURL, AudioMimeType}
+export const AudioMimeType = {
+    mp3: "audio/mpeg",
+    flac: "audio/flac",
+    m4a: "audio/mp4",
+    ogg: "audio/ogg"
+};
+export const FLAC_HEADER = [0x66, 0x4C, 0x61, 0x43, 0x00];
 
 // Also a new draft API: blob.arrayBuffer()
-async function GetArrayBuffer(blobObject) {
+export async function GetArrayBuffer(blobObject) {
     return await new Promise(resolve => {
         const reader = new FileReader();
         reader.onload = (e) => {
@@ -11,14 +17,7 @@ async function GetArrayBuffer(blobObject) {
     });
 }
 
-const AudioMimeType = {
-    mp3: "audio/mpeg",
-    flac: "audio/flac",
-    m4a: "audio/mp4",
-    ogg: "audio/ogg"
-};
-
-function GetFileInfo(artist, title, filenameNoExt) {
+export function GetFileInfo(artist, title, filenameNoExt) {
     let newArtist = "", newTitle = "";
     let filenameArray = filenameNoExt.split("-");
     if (filenameArray.length > 1) {
@@ -28,19 +27,15 @@ function GetFileInfo(artist, title, filenameNoExt) {
         newTitle = filenameArray[0].trim();
     }
 
-    if (typeof artist == "string" && artist !== "") {
-        newArtist = artist;
-    }
-    if (typeof title == "string" && title !== "") {
-        newTitle = title;
-    }
+    if (typeof artist == "string" && artist !== "") newArtist = artist;
+    if (typeof title == "string" && title !== "") newTitle = title;
     return {artist: newArtist, title: newTitle};
 }
 
 /**
  * @return {string}
  */
-function GetCoverURL(metadata) {
+export function GetCoverURL(metadata) {
     let pic_url = "";
     if (metadata.common.picture !== undefined && metadata.common.picture.length > 0) {
         let pic = new Blob([metadata.common.picture[0].data], {type: metadata.common.picture[0].format});
@@ -48,3 +43,9 @@ function GetCoverURL(metadata) {
     }
     return pic_url;
 }
+
+export function IsBytesEqual(first, second) {
+    return first.every((val, idx) => {
+        return val === second[idx];
+    })
+}