feat: added support for mmp4 extension

src/decrypt/index.ts

@@ -70,6 +70,7 @@ export async function Decrypt(file: FileInfo, config: Record<string, any>): Prom
     case 'mgg': //QQ Music New Ogg
     case 'mgg1': //QQ Music New Ogg
     case 'mgg0':
+    case 'mmp4': // QMC MP4 Container w/ E-AC-3 JOC
     case '666c6163': //QQ Music Weiyun Flac
     case '6d7033': //QQ Music Weiyun Mp3
     case '6f6767': //QQ Music Weiyun Ogg

src/decrypt/qmc.ts

@@ -18,6 +18,7 @@ export const HandlerMap: { [key: string]: Handler } = {
   mgg1: { ext: 'ogg', version: 2 },
   mflac: { ext: 'flac', version: 2 },
   mflac0: { ext: 'flac', version: 2 },
+  mmp4: { ext: 'mmp4', version: 2 },
 
   // qmcflac / qmcogg:
   // 有可能是 v2 加密但混用同一个后缀名。