Fix GBK Encoding Reading in QQMusic Mp3

src/decrypt/qmc.js

@@ -1,6 +1,8 @@
 import {AudioMimeType, DetectAudioExt, GetArrayBuffer, GetFileInfo, GetMetaCoverURL, RequestJsonp} from "./util";
 import {QmcMaskCreate58, QmcMaskDetectMflac, QmcMaskDetectMgg, QmcMaskGetDefault} from "./qmcMask";
 
+import {decode} from "iconv-lite"
+
 const musicMetadata = require("music-metadata-browser");
 
 const HandlerMap = {
@@ -40,8 +42,15 @@ export async function Decrypt(file, raw_filename, raw_ext) {
     let musicBlob = new Blob([musicDecoded], {type: mime});
 
     const musicMeta = await musicMetadata.parseBlob(musicBlob);
+    let isGbk = musicMeta.native["ID3v2.3"]
+        .some(item => item.id === "TCON" && item.value === "(12)");
+    if (isGbk) {
+        musicMeta.common.artist = decode(musicMeta.common.artist, "gbk");
+        musicMeta.common.title = decode(musicMeta.common.title, "gbk");
+        musicMeta.common.album = decode(musicMeta.common.album, "gbk");
+    }
+    //todo: Use artists list to replace artist
     const info = GetFileInfo(musicMeta.common.artist, musicMeta.common.title, raw_filename);
-
     if (handler.detect) reportKeyUsage(keyData, seed.Matrix128,
         info.artist, info.title, musicMeta.common.album, raw_filename, raw_ext);