Add Tag Edit Function & Wasm for Qmc & Kgm

package.json

@@ -1,8 +1,8 @@
 {
   "name": "unlock-music",
-  "version": "v1.10.0",
+  "version": "v1.10.3",
   "ext_build": 0,
-  "updateInfo": "重写QMC解锁，完全支持.mflac*/.mgg*; 支持JOOX解锁",
+  "updateInfo": "完善音乐标签编辑功能，支持编辑更多标签",
   "license": "MIT",
   "description": "Unlock encrypted music file in browser.",
   "repository": {
@@ -22,7 +22,6 @@
   "dependencies": {
     "@babel/preset-typescript": "^7.16.5",
     "@jixun/kugou-crypto": "^1.0.3",
-    "@jixun/qmc2-crypto": "^0.0.6-R1",
     "@unlock-music/joox-crypto": "^0.0.1-R5",
     "base64-js": "^1.5.1",
     "browser-id3-writer": "^4.4.0",

src/component/EditDialog.vue

@@ -0,0 +1,178 @@
+<style scoped>
+label {
+  cursor: pointer;
+  line-height: 1.2;
+  display: block;
+}
+.item-desc {
+  color: #aaa;
+  font-size: small;
+  display: block;
+  line-height: 1.2;
+  margin-top: 0.2em;
+}
+.item-desc a {
+  color: #aaa;
+}
+
+form >>> input {
+  font-family: 'Courier New', Courier, monospace;
+}
+
+* >>> .um-edit-dialog {
+  max-width: 90%;
+  width: 30em;
+}
+</style>
+
+<template>
+  <el-dialog @close="cancel()" title="音乐标签编辑" :visible="show" custom-class="um-edit-dialog" center>
+    <el-form ref="form" status-icon :model="form" label-width="0">
+      <section>
+        <el-image v-show="!editPicture" :src="imgFile.url || picture" style="width: 100px; height: 100px">
+          <div slot="error" class="image-slot el-image__error">暂无封面</div>
+        </el-image>
+        <el-upload v-show="editPicture" :auto-upload="false" :on-change="addFile" :on-remove="rmvFile" :show-file-list="true" :limit="1" list-type="picture" action="" drag>
+          <i class="el-icon-upload" />
+          <div class="el-upload__text">将新图片拖到此处，或<em>点击选择</em><br />以替换自动匹配的图片</div>
+          <div slot="tip" class="el-upload__tip">
+            新拖到此处的图片将覆盖原始图片
+          </div>
+        </el-upload> 
+        <i
+          :class="{'el-icon-edit': !editPicture, 'el-icon-check': editPicture}"
+          @click="changeCover"
+        ></i><br />
+        标题: 
+        <span v-show="!editTitle">{{title}}</span>
+        <el-input v-show="editTitle" v-model="title"></el-input>
+        <i
+          :class="{'el-icon-edit': !editTitle, 'el-icon-check': editTitle}"
+          @click="editTitle = !editTitle"
+        ></i><br />
+        艺术家: 
+        <span v-show="!editArtist">{{artist}}</span>
+        <el-input v-show="editArtist" v-model="artist"></el-input>
+        <i
+          :class="{'el-icon-edit': !editArtist, 'el-icon-check': editArtist}"
+          @click="editArtist = !editArtist"
+        ></i><br />
+        专辑: 
+        <span v-show="!editAlbum">{{album}}</span>
+        <el-input v-show="editAlbum" v-model="album"></el-input>
+        <i
+          :class="{'el-icon-edit': !editAlbum, 'el-icon-check': editAlbum}"
+          @click="editAlbum = !editAlbum"
+        ></i><br />
+        专辑艺术家: 
+        <span v-show="!editAlbumartist">{{albumartist}}</span>
+        <el-input v-show="editAlbumartist" v-model="albumartist"></el-input>
+        <i
+          :class="{'el-icon-edit': !editAlbumartist, 'el-icon-check': editAlbumartist}"
+          @click="editAlbumartist = !editAlbumartist"
+        ></i><br />
+        风格: 
+        <span v-show="!editGenre">{{genre}}</span>
+        <el-input v-show="editGenre" v-model="genre"></el-input>
+        <i
+          :class="{'el-icon-edit': !editGenre, 'el-icon-check': editGenre}"
+          @click="editGenre = !editGenre"
+        ></i><br />
+
+        <p class="item-desc">
+          为了节省您设备的资源，请在确定前充分检查，避免反复修改。<br />
+          直接关闭此对话框不会保留所作的更改。
+        </p>
+      </section>
+    </el-form>
+    <span slot="footer" class="dialog-footer">
+      <el-button type="primary" @click="emitConfirm()">确 定</el-button>
+    </span>
+  </el-dialog>
+</template>
+
+<script>
+import Ruby from './Ruby';
+
+export default {
+  components: {
+    Ruby,
+  },
+  props: {
+    show: { type: Boolean, required: true },
+    picture: { type: String | undefined, required: true },
+    title: { type: String | undefined, required: true },
+    artist: { type: String | undefined, required: true },
+    album: { type: String | undefined, required: true },
+    albumartist: { type: String | undefined, required: true },
+    genre: { type: String | undefined, required: true },
+  },
+  data() {
+    return {
+      form: {
+      },
+      imgFile: { tmpblob: undefined, blob: undefined, url: undefined },
+      editPicture: false,
+      editTitle: false,
+      editArtist: false,
+      editAlbum: false,
+      editAlbumartist: false,
+      editGenre: false,
+    };
+  },
+  async mounted() {
+    this.refreshForm();
+  },
+  methods: {
+    addFile(file) {
+      this.imgFile.tmpblob = file.raw;
+    },
+    rmvFile() {
+      this.imgFile.tmpblob = undefined;
+    },
+    changeCover() {
+      this.editPicture = !this.editPicture;
+      if (!this.editPicture && this.imgFile.tmpblob) {
+        this.imgFile.blob = this.imgFile.tmpblob;
+        if (this.imgFile.url) {
+          URL.revokeObjectURL(this.imgFile.url);
+        }
+        this.imgFile.url = URL.createObjectURL(this.imgFile.blob);
+      }
+    },
+
+    async refreshForm() {
+      if (this.imgFile.url) {
+        URL.revokeObjectURL(this.imgFile.url);
+      }
+      this.imgFile = { tmpblob: undefined, blob: undefined, url: undefined };
+      this.editPicture = false;
+      this.editTitle = false;
+      this.editArtist = false;
+      this.editAlbum = false;
+      this.editAlbumartist = false;
+      this.editGenre = false;
+    },
+    async cancel() {
+      this.refreshForm();
+      this.$emit('cancel');
+    },
+    async emitConfirm() {
+      if (this.editPicture) {
+        this.changeCover();
+      }
+      if (this.imgFile.url) {
+        URL.revokeObjectURL(this.imgFile.url);
+      }
+      this.$emit('ok', {
+        picture: this.imgFile.blob,
+        title: this.title,
+        artist: this.artist,
+        album: this.album,
+        albumartist: this.albumartist,
+        genre: this.genre,
+      });
+    },
+  },
+};
+</script>

src/component/PreviewTable.vue

@@ -27,6 +27,7 @@
         <el-button circle icon="el-icon-video-play" type="success" @click="handlePlay(scope.$index, scope.row)">
         </el-button>
         <el-button circle icon="el-icon-download" @click="handleDownload(scope.row)"></el-button>
+        <el-button circle icon="el-icon-edit" @click="handleEdit(scope.row)"></el-button>
         <el-button circle icon="el-icon-delete" type="danger" @click="handleDelete(scope.$index, scope.row)">
         </el-button>
       </template>
@@ -55,6 +56,9 @@ export default {
     handleDownload(row) {
       this.$emit('download', row);
     },
+    handleEdit(row) {
+      this.$emit('edit', row);
+    },
   },
 };
 </script>

src/decrypt/kgm.ts

@@ -8,6 +8,7 @@ import {
 } from '@/decrypt/utils';
 import { parseBlob as metaParseBlob } from 'music-metadata-browser';
 import { DecryptResult } from '@/decrypt/entity';
+import { DecryptKgmWasm } from '@/decrypt/kgm_wasm';
 import { decryptKgmByteAtOffsetV2, decryptVprByteAtOffset } from '@jixun/kugou-crypto/dist/utils/decryptionHelper';
 
 //prettier-ignore
@@ -22,31 +23,48 @@ const KgmHeader = [
 ]
 
 export async function Decrypt(file: File, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
-  const oriData = new Uint8Array(await GetArrayBuffer(file));
+  const oriData = await GetArrayBuffer(file);
   if (raw_ext === 'vpr') {
-    if (!BytesHasPrefix(oriData, VprHeader)) throw Error('Not a valid vpr file!');
+    if (!BytesHasPrefix(new Uint8Array(oriData), VprHeader)) throw Error('Not a valid vpr file!');
   } else {
-    if (!BytesHasPrefix(oriData, KgmHeader)) throw Error('Not a valid kgm(a) file!');
+    if (!BytesHasPrefix(new Uint8Array(oriData), KgmHeader)) throw Error('Not a valid kgm(a) file!');
   }
-  let bHeaderLen = new DataView(oriData.slice(0x10, 0x14).buffer);
+  let musicDecoded: Uint8Array | undefined;
+  if (globalThis.WebAssembly) {
+    console.log('kgm: using wasm decoder');
+
+    const kgmDecrypted = await DecryptKgmWasm(oriData, raw_ext);
+    // 若 v2 检测失败，降级到 v1 再尝试一次
+    if (kgmDecrypted.success) {
+      musicDecoded = kgmDecrypted.data;
+      console.log('kgm wasm decoder suceeded');
+    } else {
+      console.warn('KgmWasm failed with error %s', kgmDecrypted.error || '(no error)');
+    }
+  }
+
+  if (!musicDecoded) {
+    musicDecoded = new Uint8Array(oriData);
+    let bHeaderLen = new DataView(musicDecoded.slice(0x10, 0x14).buffer);
     let headerLen = bHeaderLen.getUint32(0, true);
 
-  let audioData = oriData.slice(headerLen);
+    let key1 = Array.from(musicDecoded.slice(0x1c, 0x2c));
-  let dataLen = audioData.length;
-
-  let key1 = Array.from(oriData.slice(0x1c, 0x2c));
     key1.push(0);
 
+    musicDecoded = musicDecoded.slice(headerLen);
+    let dataLen = musicDecoded.length;
+
     const decryptByte = raw_ext === 'vpr' ? decryptVprByteAtOffset : decryptKgmByteAtOffsetV2;
     for (let i = 0; i < dataLen; i++) {
-    audioData[i] = decryptByte(audioData[i], key1, i);
+      musicDecoded[i] = decryptByte(musicDecoded[i], key1, i);
+    }
   }
 
-  const ext = SniffAudioExt(audioData);
+  const ext = SniffAudioExt(musicDecoded);
   const mime = AudioMimeType[ext];
-  let musicBlob = new Blob([audioData], { type: mime });
+  let musicBlob = new Blob([musicDecoded], { type: mime });
   const musicMeta = await metaParseBlob(musicBlob);
-  const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist);
+  const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artists == undefined ? musicMeta.common.artist : musicMeta.common.artists.toString());
   return {
     album: musicMeta.common.album,
     picture: GetCoverFromFile(musicMeta),

src/decrypt/kgm_wasm.ts

@@ -0,0 +1,67 @@
+import KgmCryptoModule from '@/KgmWasm/KgmWasmBundle';
+import { MergeUint8Array } from '@/utils/MergeUint8Array';
+
+// 每次处理 2M 的数据
+const DECRYPTION_BUF_SIZE = 2 *1024 * 1024;
+
+export interface KGMDecryptionResult {
+  success: boolean;
+  data: Uint8Array;
+  error: string;
+}
+
+/**
+ * 解密一个 KGM 加密的文件。
+ *
+ * 如果检测并解密成功，返回解密后的 Uint8Array 数据。
+ * @param  {ArrayBuffer} kgmBlob 读入的文件 Blob
+ */
+export async function DecryptKgmWasm(kgmBlob: ArrayBuffer, ext: string): Promise<KGMDecryptionResult> {
+  const result: KGMDecryptionResult = { success: false, data: new Uint8Array(), error: '' };
+
+  // 初始化模组
+  let KgmCrypto: any;
+
+  try {
+    KgmCrypto = await KgmCryptoModule();
+  } catch (err: any) {
+    result.error = err?.message || 'wasm 加载失败';
+    return result;
+  }
+  if (!KgmCrypto) {
+    result.error = 'wasm 加载失败';
+    return result;
+  }
+
+  // 申请内存块，并文件末端数据到 WASM 的内存堆
+  let kgmBuf = new Uint8Array(kgmBlob);
+  const pQmcBuf = KgmCrypto._malloc(DECRYPTION_BUF_SIZE);
+  KgmCrypto.writeArrayToMemory(kgmBuf.slice(0, DECRYPTION_BUF_SIZE), pQmcBuf);
+
+  // 进行解密初始化
+  const headerSize = KgmCrypto.preDec(pQmcBuf, DECRYPTION_BUF_SIZE, ext);
+  console.log(headerSize);
+  kgmBuf = kgmBuf.slice(headerSize);
+
+  const decryptedParts = [];
+  let offset = 0;
+  let bytesToDecrypt = kgmBuf.length;
+  while (bytesToDecrypt > 0) {
+    const blockSize = Math.min(bytesToDecrypt, DECRYPTION_BUF_SIZE);
+
+    // 解密一些片段
+    const blockData = new Uint8Array(kgmBuf.slice(offset, offset + blockSize));
+    KgmCrypto.writeArrayToMemory(blockData, pQmcBuf);
+    KgmCrypto.decBlob(pQmcBuf, blockSize, offset);
+    decryptedParts.push(KgmCrypto.HEAPU8.slice(pQmcBuf, pQmcBuf + blockSize));
+
+    offset += blockSize;
+    bytesToDecrypt -= blockSize;
+  }
+  KgmCrypto._free(pQmcBuf);
+
+  result.data = MergeUint8Array(decryptedParts);
+  result.success = true;
+
+  return result;
+}

src/decrypt/kwm.ts

@@ -38,7 +38,7 @@ export async function Decrypt(file: File, raw_filename: string, _: string): Prom
   let musicBlob = new Blob([audioData], { type: mime });
 
   const musicMeta = await metaParseBlob(musicBlob);
-  const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist);
+  const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artists == undefined ? musicMeta.common.artist : musicMeta.common.artists.toString());
   return {
     album: musicMeta.common.album,
     picture: GetCoverFromFile(musicMeta),

src/decrypt/ncmcache.ts

@@ -13,7 +13,7 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
   const ext = SniffAudioExt(buffer, raw_ext);
   if (ext !== raw_ext) file = new Blob([buffer], { type: AudioMimeType[ext] });
   const tag = await metaParseBlob(file);
-  const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist);
+  const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artists == undefined ? tag.common.artist : tag.common.artists.toString());
 
   return {
     title,

src/decrypt/qmc.ts

@@ -3,7 +3,7 @@ import { AudioMimeType, GetArrayBuffer, SniffAudioExt } from '@/decrypt/utils';
 
 import { DecryptResult } from '@/decrypt/entity';
 import { QmcDeriveKey } from '@/decrypt/qmc_key';
-import { DecryptQMCWasm } from '@/decrypt/qmc_wasm';
+import { DecryptQmcWasm } from '@/decrypt/qmc_wasm';
 import { extractQQMusicMeta } from '@/utils/qm_meta';
 
 interface Handler {
@@ -24,9 +24,9 @@ export const HandlerMap: { [key: string]: Handler } = {
   qmcflac: { ext: 'flac', version: 2 },
   qmcogg: { ext: 'ogg', version: 2 },
 
-  qmc0: { ext: 'mp3', version: 1 },
+  qmc0: { ext: 'mp3', version: 2 },
-  qmc2: { ext: 'ogg', version: 1 },
+  qmc2: { ext: 'ogg', version: 2 },
-  qmc3: { ext: 'mp3', version: 1 },
+  qmc3: { ext: 'mp3', version: 2 },
   bkcmp3: { ext: 'mp3', version: 1 },
   bkcflac: { ext: 'flac', version: 1 },
   tkm: { ext: 'm4a', version: 1 },
@@ -49,13 +49,14 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
   if (version === 2 && globalThis.WebAssembly) {
     console.log('qmc: using wasm decoder');
 
-    const v2Decrypted = await DecryptQMCWasm(fileBuffer);
+    const v2Decrypted = await DecryptQmcWasm(fileBuffer, raw_ext);
     // 若 v2 检测失败，降级到 v1 再尝试一次
     if (v2Decrypted.success) {
       musicDecoded = v2Decrypted.data;
       musicID = v2Decrypted.songId;
+      console.log('qmc wasm decoder suceeded');
     } else {
-      console.warn('qmc2-wasm failed with error %s', v2Decrypted.error || '(no error)');
+      console.warn('QmcWasm failed with error %s', v2Decrypted.error || '(no error)');
     }
   }
 
@@ -151,7 +152,7 @@ export class QmcDecoder {
     } else {
       const sizeView = new DataView(last4Byte.buffer, last4Byte.byteOffset);
       const keySize = sizeView.getUint32(0, true);
-      if (keySize < 0x300) {
+      if (keySize < 0x400) {
         this.audioSize = this.size - keySize - 4;
         const rawKey = this.file.subarray(this.audioSize, this.size - 4);
         this.setCipher(rawKey);

src/decrypt/qmc_key.ts

@@ -5,12 +5,14 @@ const ZERO_LEN = 7;
 
 export function QmcDeriveKey(raw: Uint8Array): Uint8Array {
   const textDec = new TextDecoder();
-  const rawDec = Buffer.from(textDec.decode(raw), 'base64');
+  let rawDec = Buffer.from(textDec.decode(raw), 'base64');
   let n = rawDec.length;
   if (n < 16) {
     throw Error('key length is too short');
   }
 
+  rawDec = decryptV2Key(rawDec);
+
   const simpleKey = simpleMakeKey(106, 8);
   let teaKey = new Uint8Array(16);
   for (let i = 0; i < 8; i++) {
@@ -32,6 +34,30 @@ export function simpleMakeKey(salt: number, length: number): number[] {
   return keyBuf;
 }
 
+const mixKey1: Uint8Array = new Uint8Array([ 0x33, 0x38, 0x36, 0x5A, 0x4A, 0x59, 0x21, 0x40, 0x23, 0x2A, 0x24, 0x25, 0x5E, 0x26, 0x29, 0x28 ])
+const mixKey2: Uint8Array = new Uint8Array([ 0x2A, 0x2A, 0x23, 0x21, 0x28, 0x23, 0x24, 0x25, 0x26, 0x5E, 0x61, 0x31, 0x63, 0x5A, 0x2C, 0x54 ])
+
+const v2KeyPrefix: Uint8Array = new Uint8Array([ 0x51, 0x51, 0x4D, 0x75, 0x73, 0x69, 0x63, 0x20, 0x45, 0x6E, 0x63, 0x56, 0x32, 0x2C, 0x4B, 0x65, 0x79, 0x3A ])
+
+function decryptV2Key(key: Buffer): Buffer
+{
+  const textEnc = new TextDecoder();
+  if (key.length < 18 || textEnc.decode(key.slice(0, 18)) !== 'QQMusic EncV2,Key:') {
+    return key;
+  }
+
+  let out = decryptTencentTea(key.slice(18), mixKey1);
+  out = decryptTencentTea(out, mixKey2);
+  const textDec = new TextDecoder();
+  const keyDec = Buffer.from(textDec.decode(out), 'base64');
+  let n = keyDec.length;
+  if (n < 16) {
+    throw Error('EncV2 key decode failed');
+  }
+
+  return keyDec;
+}
+
 function decryptTencentTea(inBuf: Uint8Array, key: Uint8Array): Uint8Array {
   if (inBuf.length % 8 != 0) {
     throw Error('inBuf size not a multiple of the block size');

src/decrypt/qmc_wasm.ts

@@ -1,14 +1,10 @@
-import QMCCryptoModule from '@jixun/qmc2-crypto/QMC2-wasm-bundle';
+import QmcCryptoModule from '@/QmcWasm/QmcWasmBundle';
 import { MergeUint8Array } from '@/utils/MergeUint8Array';
-import { QMCCrypto } from '@jixun/qmc2-crypto/QMCCrypto';
-
-// 检测文件末端使用的缓冲区大小
-const DETECTION_SIZE = 40;
 
 // 每次处理 2M 的数据
-const DECRYPTION_BUF_SIZE = 2 * 1024 * 1024;
+const DECRYPTION_BUF_SIZE = 2 *1024 * 1024;
 
-export interface QMC2DecryptionResult {
+export interface QMCDecryptionResult {
   success: boolean;
   data: Uint8Array;
   songId: string | number;
@@ -16,96 +12,62 @@ export interface QMC2DecryptionResult {
 }
 
 /**
- * 解密一个 QMC2 加密的文件。
+ * 解密一个 QMC 加密的文件。
  *
  * 如果检测并解密成功，返回解密后的 Uint8Array 数据。
- * @param  {ArrayBuffer} mggBlob 读入的文件 Blob
+ * @param  {ArrayBuffer} qmcBlob 读入的文件 Blob
  */
-export async function DecryptQMCWasm(mggBlob: ArrayBuffer): Promise<QMC2DecryptionResult> {
+export async function DecryptQmcWasm(qmcBlob: ArrayBuffer, ext: string): Promise<QMCDecryptionResult> {
-  const result: QMC2DecryptionResult = { success: false, data: new Uint8Array(), songId: 0, error: '' };
+  const result: QMCDecryptionResult = { success: false, data: new Uint8Array(), songId: 0, error: '' };
 
   // 初始化模组
-  let QMCCrypto: QMCCrypto;
+  let QmcCrypto: any;
 
   try {
-    QMCCrypto = await QMCCryptoModule();
+    QmcCrypto = await QmcCryptoModule();
   } catch (err: any) {
     result.error = err?.message || 'wasm 加载失败';
     return result;
   }
-
+  if (!QmcCrypto) {
-  // 申请内存块，并文件末端数据到 WASM 的内存堆
+    result.error = 'wasm 加载失败';
-  const detectionBuf = new Uint8Array(mggBlob.slice(-DETECTION_SIZE));
-  const pDetectionBuf = QMCCrypto._malloc(detectionBuf.length);
-  QMCCrypto.writeArrayToMemory(detectionBuf, pDetectionBuf);
-
-  // 检测结果内存块
-  const pDetectionResult = QMCCrypto._malloc(QMCCrypto.sizeof_qmc_detection());
-
-  // 进行检测
-  const detectOK = QMCCrypto.detectKeyEndPosition(pDetectionResult, pDetectionBuf, detectionBuf.length);
-
-  // 提取结构体内容：
-  // (pos: i32; len: i32; error: char[??])
-  const position = QMCCrypto.getValue(pDetectionResult, 'i32');
-  const len = QMCCrypto.getValue(pDetectionResult + 4, 'i32');
-
-  result.success = detectOK;
-  result.error = QMCCrypto.UTF8ToString(
-    pDetectionResult + QMCCrypto.offsetof_error_msg(),
-    QMCCrypto.sizeof_error_msg(),
-  );
-  const songId = QMCCrypto.UTF8ToString(pDetectionResult + QMCCrypto.offsetof_song_id(), QMCCrypto.sizeof_song_id());
-  if (!songId) {
-    console.debug('qmc2-wasm: songId not found');
-  } else if (/^\d+$/.test(songId)) {
-    result.songId = songId;
-  } else {
-    console.warn('qmc2-wasm: Invalid songId: %s', songId);
-  }
-
-  // 释放内存
-  QMCCrypto._free(pDetectionBuf);
-  QMCCrypto._free(pDetectionResult);
-
-  if (!detectOK) {
     return result;
   }
 
-  // 计算解密后文件的大小。
+  // 申请内存块，并文件末端数据到 WASM 的内存堆
-  // 之前得到的 position 为相对当前检测数据起点的偏移。
+  const qmcBuf = new Uint8Array(qmcBlob);
-  const decryptedSize = mggBlob.byteLength - DETECTION_SIZE + position;
+  const pQmcBuf = QmcCrypto._malloc(DECRYPTION_BUF_SIZE);
+  QmcCrypto.writeArrayToMemory(qmcBuf.slice(-DECRYPTION_BUF_SIZE), pQmcBuf);
 
-  // 提取嵌入到文件的 EKey
+  // 进行解密初始化
-  const ekey = new Uint8Array(mggBlob.slice(decryptedSize, decryptedSize + len));
+  ext = '.' + ext;
-
+  const tailSize = QmcCrypto.preDec(pQmcBuf, DECRYPTION_BUF_SIZE, ext);
-  // 解码 UTF-8 数据到 string
+  if (tailSize == -1) {
-  const decoder = new TextDecoder();
+    result.error = QmcCrypto.getError();
-  const ekey_b64 = decoder.decode(ekey);
+    return result;
-
+  } else {
-  // 初始化加密与缓冲区
+    result.songId = QmcCrypto.getSongId();
-  const hCrypto = QMCCrypto.createInstWidthEKey(ekey_b64);
+    result.songId = result.songId == "0" ? 0 : result.songId;
-  const buf = QMCCrypto._malloc(DECRYPTION_BUF_SIZE);
+  }
 
   const decryptedParts = [];
   let offset = 0;
-  let bytesToDecrypt = decryptedSize;
+  let bytesToDecrypt = qmcBuf.length - tailSize;
   while (bytesToDecrypt > 0) {
     const blockSize = Math.min(bytesToDecrypt, DECRYPTION_BUF_SIZE);
 
     // 解密一些片段
-    const blockData = new Uint8Array(mggBlob.slice(offset, offset + blockSize));
+    const blockData = new Uint8Array(qmcBuf.slice(offset, offset + blockSize));
-    QMCCrypto.writeArrayToMemory(blockData, buf);
+    QmcCrypto.writeArrayToMemory(blockData, pQmcBuf);
-    QMCCrypto.decryptStream(hCrypto, buf, offset, blockSize);
+    decryptedParts.push(QmcCrypto.HEAPU8.slice(pQmcBuf, pQmcBuf + QmcCrypto.decBlob(pQmcBuf, blockSize, offset)));
-    decryptedParts.push(QMCCrypto.HEAPU8.slice(buf, buf + blockSize));
 
     offset += blockSize;
     bytesToDecrypt -= blockSize;
   }
-  QMCCrypto._free(buf);
+  QmcCrypto._free(pQmcBuf);
-  hCrypto.delete();
 
   result.data = MergeUint8Array(decryptedParts);
+  result.success = true;
 
   return result;
 }

src/decrypt/qmccache.ts

@@ -8,34 +8,53 @@ import {
 } from '@/decrypt/utils';
 
 import { Decrypt as QmcDecrypt, HandlerMap } from '@/decrypt/qmc';
+import { DecryptQmcWasm } from '@/decrypt/qmc_wasm';
 
 import { DecryptResult } from '@/decrypt/entity';
 
 import { parseBlob as metaParseBlob } from 'music-metadata-browser';
 
-export async function Decrypt(file: Blob, raw_filename: string, _: string): Promise<DecryptResult> {
+export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
-  const buffer = new Uint8Array(await GetArrayBuffer(file));
+  const buffer = await GetArrayBuffer(file);
-  let length = buffer.length;
+
-  for (let i = 0; i < length; i++) {
+  let musicDecoded: Uint8Array | undefined;
-    buffer[i] ^= 0xf4;
+  if (globalThis.WebAssembly) {
-    if (buffer[i] <= 0x3f) buffer[i] = buffer[i] * 4;
+    console.log('qmc: using wasm decoder');
-    else if (buffer[i] <= 0x7f) buffer[i] = (buffer[i] - 0x40) * 4 + 1;
+
-    else if (buffer[i] <= 0xbf) buffer[i] = (buffer[i] - 0x80) * 4 + 2;
+    const qmcDecrypted = await DecryptQmcWasm(buffer, raw_ext);
-    else buffer[i] = (buffer[i] - 0xc0) * 4 + 3;
+    // 若 qmc 检测失败，降级到 v1 再尝试一次
+    if (qmcDecrypted.success) {
+      musicDecoded = qmcDecrypted.data;
+      console.log('qmc wasm decoder suceeded');
+    } else {
+      console.warn('QmcWasm failed with error %s', qmcDecrypted.error || '(no error)');
     }
-  let ext = SniffAudioExt(buffer, '');
+  }
+
+  if (!musicDecoded) {
+    musicDecoded = new Uint8Array(buffer);
+    let length = musicDecoded.length;
+    for (let i = 0; i < length; i++) {
+      musicDecoded[i] ^= 0xf4;
+      if (musicDecoded[i] <= 0x3f) musicDecoded[i] = musicDecoded[i] * 4;
+      else if (musicDecoded[i] <= 0x7f) musicDecoded[i] = (musicDecoded[i] - 0x40) * 4 + 1;
+      else if (musicDecoded[i] <= 0xbf) musicDecoded[i] = (musicDecoded[i] - 0x80) * 4 + 2;
+      else musicDecoded[i] = (musicDecoded[i] - 0xc0) * 4 + 3;
+    }
+  }
+  let ext = SniffAudioExt(musicDecoded, '');
   const newName = SplitFilename(raw_filename);
   let audioBlob: Blob;
   if (ext !== '' || newName.ext === 'mp3') {
-    audioBlob = new Blob([buffer], { type: AudioMimeType[ext] });
+    audioBlob = new Blob([musicDecoded], { type: AudioMimeType[ext] });
   } else if (newName.ext in HandlerMap) {
-    audioBlob = new Blob([buffer], { type: 'application/octet-stream' });
+    audioBlob = new Blob([musicDecoded], { type: 'application/octet-stream' });
     return QmcDecrypt(audioBlob, newName.name, newName.ext);
   } else {
     throw '不支持的QQ音乐缓存格式';
   }
   const tag = await metaParseBlob(audioBlob);
-  const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist);
+  const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artists == undefined ? tag.common.artist : tag.common.artists.toString());
 
   return {
     title,

src/decrypt/raw.ts

@@ -17,7 +17,7 @@ export async function Decrypt(
     if (ext !== raw_ext) file = new Blob([buffer], { type: AudioMimeType[ext] });
   }
   const tag = await metaParseBlob(file);
-  const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist);
+  const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artists == undefined ? tag.common.artist : tag.common.artists.toString());
 
   return {
     title,

src/decrypt/utils.ts

@@ -2,6 +2,8 @@ import { IAudioMetadata } from 'music-metadata-browser';
 import ID3Writer from 'browser-id3-writer';
 import MetaFlac from 'metaflac-js';
 
+export const split_regex = /[ ]?[,;/_、][ ]?/;
+
 export const FLAC_HEADER = [0x66, 0x4c, 0x61, 0x43];
 export const MP3_HEADER = [0x49, 0x44, 0x33];
 export const OGG_HEADER = [0x4f, 0x67, 0x67, 0x53];
@@ -91,7 +93,7 @@ export function GetMetaFromFile(
 
   const items = filename.split(separator);
   if (items.length > 1) {
-    if (!meta.artist) meta.artist = items[0].trim();
+    if (!meta.artist || meta.artist.split(split_regex).length < items[0].trim().split(split_regex).length) meta.artist = items[0].trim();
     if (!meta.title) meta.title = items[1].trim();
   } else if (items.length === 1) {
     if (!meta.title) meta.title = items[0].trim();
@@ -119,6 +121,8 @@ export interface IMusicMeta {
   title: string;
   artists?: string[];
   album?: string;
+  albumartist?: string;
+  genre?: string[];
   picture?: ArrayBuffer;
   picture_desc?: string;
 }
@@ -169,6 +173,83 @@ export function WriteMetaToFlac(audioData: Buffer, info: IMusicMeta, original: I
   return writer.save();
 }
 
+export function RewriteMetaToMp3(audioData: Buffer, info: IMusicMeta, original: IAudioMetadata) {
+  const writer = new ID3Writer(audioData);
+
+  // reserve original data
+  const frames = original.native['ID3v2.4'] || original.native['ID3v2.3'] || original.native['ID3v2.2'] || [];
+  frames.forEach((frame) => {
+    if (frame.id !== 'TPE1'
+      && frame.id !== 'TIT2'
+      && frame.id !== 'TALB'
+      && frame.id !== 'TPE2'
+      && frame.id !== 'TCON'
+    ) {
+      try {
+        writer.setFrame(frame.id, frame.value);
+      } catch (e) {
+        throw new Error('write unknown mp3 frame failed');
+      }
+    }
+  });
+
+  const old = original.common;
+  writer
+    .setFrame('TPE1', info?.artists || old.artists || [])
+    .setFrame('TIT2', info?.title || old.title)
+    .setFrame('TALB', info?.album || old.album || '')
+    .setFrame('TPE2', info?.albumartist || old.albumartist || '')
+    .setFrame('TCON', info?.genre || old.genre || []);
+  if (info.picture) {
+    writer.setFrame('APIC', {
+      type: 3,
+      data: info.picture,
+      description: info.picture_desc || '',
+    });
+  }
+  return writer.addTag();
+}
+
+export function RewriteMetaToFlac(audioData: Buffer, info: IMusicMeta, original: IAudioMetadata) {
+  const writer = new MetaFlac(audioData);
+  const old = original.common;
+  if (info.title) {
+    if (old.title) {
+      writer.removeTag('TITLE');
+    }
+    writer.setTag('TITLE=' + info.title);
+  }
+  if (info.album) {
+    if (old.album) {
+      writer.removeTag('ALBUM');
+    }
+    writer.setTag('ALBUM=' + info.album);
+  }
+  if (info.albumartist) {
+    if (old.albumartist) {
+      writer.removeTag('ALBUMARTIST');
+    }
+    writer.setTag('ALBUMARTIST=' + info.albumartist);
+  }
+  if (info.artists) {
+    if (old.artists) {
+      writer.removeTag('ARTIST');
+    }
+    info.artists.forEach((artist) => writer.setTag('ARTIST=' + artist));
+  }
+  if (info.genre) {
+    if (old.genre) {
+      writer.removeTag('GENRE');
+    }
+    info.genre.forEach((singlegenre) => writer.setTag('GENRE=' + singlegenre));
+  }
+
+  if (info.picture) {
+    writer.importPictureFromBuffer(Buffer.from(info.picture));
+  }
+  return writer.save();
+}
+
 export function SplitFilename(n: string): { name: string; ext: string } {
   const pos = n.lastIndexOf('.');
   return {

src/decrypt/xm.ts

@@ -49,7 +49,7 @@ export async function Decrypt(file: File, raw_filename: string, raw_ext: string)
   const { title, artist } = GetMetaFromFile(
     raw_filename,
     musicMeta.common.title,
-    musicMeta.common.artist,
+    musicMeta.common.artists == undefined ? musicMeta.common.artist : musicMeta.common.artists.toString(),
     raw_filename.indexOf('_') === -1 ? '-' : '_',
   );
 

src/utils/qm_meta.ts

@@ -8,6 +8,7 @@ import {
   WriteMetaToFlac,
   WriteMetaToMp3,
   AudioMimeType,
+  split_regex,
 } from '@/decrypt/utils';
 import { getQMImageURLFromPMID, queryAlbumCover, querySongInfoById } from '@/utils/api';
 
@@ -38,13 +39,20 @@ export async function extractQQMusicMeta(
     if (!musicMeta.native.hasOwnProperty(metaIdx)) continue;
     if (musicMeta.native[metaIdx].some((item) => item.id === 'TCON' && item.value === '(12)')) {
       console.warn('try using gbk encoding to decode meta');
+      musicMeta.common.artist = '';
+      if (musicMeta.common.artists == undefined) {
         musicMeta.common.artist = iconv.decode(new Buffer(musicMeta.common.artist ?? ''), 'gbk');
+      }
+      else {
+        musicMeta.common.artists.forEach((artist) => artist = iconv.decode(new Buffer(artist ?? ''), 'gbk'));
+        musicMeta.common.artist = musicMeta.common.artists.toString();
+      }
       musicMeta.common.title = iconv.decode(new Buffer(musicMeta.common.title ?? ''), 'gbk');
       musicMeta.common.album = iconv.decode(new Buffer(musicMeta.common.album ?? ''), 'gbk');
     }
   }
 
-  if (id) {
+  if (id && id !== '0') {
     try {
       return fetchMetadataFromSongId(id, ext, musicMeta, musicBlob);
     } catch (e) {
@@ -67,7 +75,7 @@ export async function extractQQMusicMeta(
     imgUrl: imageURL,
     blob: await writeMetaToAudioFile({
       title: info.title,
-      artists: info.artist.split(' _ '),
+      artists: info.artist.split(split_regex),
       ext,
       imageURL,
       musicMeta,
@@ -88,7 +96,7 @@ async function fetchMetadataFromSongId(
 
   return {
     title: info.track_info.title,
-    artist: artists.join('、'),
+    artist: artists.join(','),
     album: info.track_info.album.name,
     imgUrl: imageURL,
 

src/view/Home.vue

@@ -10,6 +10,15 @@
         </el-radio>
       </el-row>
       <el-row>
+        <edit-dialog
+          :show="showEditDialog"
+          :picture="editing_data.picture"
+          :title="editing_data.title"
+          :artist="editing_data.artist"
+          :album="editing_data.album"
+          :albumartist="editing_data.albumartist"
+          :genre="editing_data.genre"
+          @cancel="showEditDialog = false" @ok="handleEdit"></edit-dialog>
         <config-dialog :show="showConfigDialog" @done="showConfigDialog = false"></config-dialog>
         <el-tooltip class="item" effect="dark" placement="top">
           <div slot="content">
@@ -35,7 +44,7 @@
 
     <audio :autoplay="playing_auto" :src="playing_url" controls />
 
-    <PreviewTable :policy="filename_policy" :table-data="tableData" @download="saveFile" @play="changePlaying" />
+    <PreviewTable :policy="filename_policy" :table-data="tableData" @download="saveFile" @edit="editFile" @play="changePlaying" />
   </div>
 </template>
 
@@ -43,8 +52,11 @@
 import FileSelector from '@/component/FileSelector';
 import PreviewTable from '@/component/PreviewTable';
 import ConfigDialog from '@/component/ConfigDialog';
+import EditDialog from '@/component/EditDialog';
 
 import { DownloadBlobMusic, FilenamePolicy, FilenamePolicies, RemoveBlobMusic, DirectlyWriteFile } from '@/utils/utils';
+import { GetImageFromURL, RewriteMetaToMp3, RewriteMetaToFlac, AudioMimeType, split_regex } from '@/decrypt/utils';
+import { parseBlob as metaParseBlob } from 'music-metadata-browser';
 
 export default {
   name: 'Home',
@@ -52,10 +64,13 @@ export default {
     FileSelector,
     PreviewTable,
     ConfigDialog,
+    EditDialog,
   },
   data() {
     return {
       showConfigDialog: false,
+      showEditDialog: false,
+      editing_data: { picture: '', title: '', artist: '', album: '', albumartist: '', genre: '', },
       tableData: [],
       playing_url: '',
       playing_auto: false,
@@ -128,7 +143,56 @@ export default {
         }
       }, 300);
     },
+    async handleEdit(data) {
+      this.showEditDialog = false;
+      URL.revokeObjectURL(this.editing_data.file);
+      if (data.picture) {
+        URL.revokeObjectURL(this.editing_data.picture);
+        this.editing_data.picture = URL.createObjectURL(data.picture);
+      }
+      this.editing_data.title = data.title;
+      this.editing_data.artist = data.artist;
+      this.editing_data.album = data.album;
+      try {
+        const musicMeta = await metaParseBlob(new Blob([this.editing_data.blob], { type: mime }));
+        const imageInfo = await GetImageFromURL(this.editing_data.picture);
+        if (!imageInfo) {
+          console.warn('获取图像失败', this.editing_data.picture);
+        }
+        const newMeta = { picture: imageInfo?.buffer,
+          title: data.title,
+          artists: data.artist.split(split_regex),
+          album: data.album,
+          albumartist: data.albumartist,
+          genre: data.genre.split(split_regex)
+        };
+        const buffer = Buffer.from(await this.editing_data.blob.arrayBuffer());
+        const mime = AudioMimeType[this.editing_data.ext] || AudioMimeType.mp3;
+        if (this.editing_data.ext === 'mp3') {
+          this.editing_data.blob = new Blob([RewriteMetaToMp3(buffer, newMeta, musicMeta)], { type: mime });
+        } else if (this.editing_data.ext === 'flac') {
+          this.editing_data.blob = new Blob([RewriteMetaToFlac(buffer, newMeta, musicMeta)], { type: mime });
+        } else {
+          console.info('writing metadata for ' + info.ext + ' is not being supported for now');
+        }
+      } catch (e) {
+        console.warn('Error while appending cover image to file ' + e);
+      }
+      this.editing_data.file = URL.createObjectURL(this.editing_data.blob);/**/
+      this.$notify.success({
+        title: '修改成功',
+        message: '成功修改 ' + this.editing_data.title,
+        duration: 3000,
+      });
+    },
 
+    async editFile(data) {
+      this.editing_data = data;
+      const musicMeta = await metaParseBlob(this.editing_data.blob);
+      this.editing_data.albumartist = musicMeta.common.albumartist || '';
+      this.editing_data.genre = musicMeta.common.genre?.toString() || '';
+      this.showEditDialog = true;
+    },
     async saveFile(data) {
       if (this.dir) {
         await DirectlyWriteFile(data, this.filename_policy, this.dir);