Reconstruct

src/App.vue

@@ -85,10 +85,7 @@
 
 <script>
 
-    const NcmDecrypt = require("./plugins/ncm");
+    const dec = require("./decrypt/common");
-    const QmcDecrypt = require("./plugins/qmc");
-    const RawDecrypt = require("./plugins/raw");
-    const MFlacDecrypt = require("./plugins/mflac");
     export default {
         name: 'app',
         components: {},
@@ -119,33 +116,9 @@
                 });
             },
             handleFile(file) {
-                let ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
+
                 (async () => {
-                    let data = null;
+                    let data =await dec.CommonDecrypt(file);
-                    switch (ext) {
-                        case "ncm":
-                            data = await NcmDecrypt.Decrypt(file.raw);
-                            break;
-                        case "mp3":
-                        case "flac":
-                            data = await RawDecrypt.Decrypt(file.raw);
-                            break;
-                        case "qmc3":
-                        case "qmc0":
-                        case "qmcflac":
-                        case "qmcogg":
-                            data = await QmcDecrypt.Decrypt(file.raw);
-                            break;
-                        case "mflac":
-                            data = await MFlacDecrypt.Decrypt(file.raw);
-                            break;
-                        default:
-                            data = {
-                                status: false,
-                                message: "不支持此文件格式",
-                            };
-                            break;
-                    }
                     if (data.status) {
                         this.tableData.push(data);
                         this.$notify.success({
@@ -154,8 +127,7 @@
                             duration: 3000
                         });
                         let _rp_data = [data.title, data.artist, data.album];
-                        console.log(data);
+                        window._paq.push(["trackEvent", "Unlock", data.rawExt + "," + data.mime, JSON.stringify(_rp_data)]);
-                        window._paq.push(["trackEvent", "Unlock", ext + "," + data.mime, JSON.stringify(_rp_data)]);
                     } else {
                         this.$notify.error({
                             title: '出现问题',
@@ -173,7 +145,6 @@
                 this.playing_auto = true;
             },
             handleDelete(index, row) {
-                console.log(index);
                 URL.revokeObjectURL(row.file);
                 URL.revokeObjectURL(row.picture);
                 this.tableData.splice(index, 1);

src/decrypt/common.js

@@ -0,0 +1,44 @@
+const NcmDecrypt = require("./ncm");
+const QmcDecrypt = require("./qmc");
+const RawDecrypt = require("./raw");
+const MFlacDecrypt = require("./mflac");
+
+export {CommonDecrypt}
+
+async function CommonDecrypt(file) {
+    let raw_ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
+    let raw_filename = file.name.substring(0, file.name.lastIndexOf("."));
+    let rt_data;
+    switch (raw_ext) {
+        case "ncm":// Netease Mp3/Flac
+            rt_data = await NcmDecrypt.Decrypt(file.raw);
+            break;
+        case "mp3":// Raw Mp3
+        case "flac"://Raw Flac
+        case "m4a":// todo: Raw M4A
+        case "tm0":// QQ Music IOS Mp3
+        case "tm3":// QQ Music IOS Mp3
+            rt_data = await RawDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
+            break;
+        case "qmc3"://QQ Music Android Mp3
+        case "qmc0"://QQ Music Android Mp3
+        case "qmcflac"://QQ Music Android Flac
+        case "qmcogg"://QQ Music Android Ogg
+            rt_data = await QmcDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
+            break;
+        case "mflac"://QQ Music Desktop Flac
+            rt_data = await MFlacDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
+            break;
+        case "tm2":// todo: QQ Music IOS M4A
+        case "tm6":// todo: QQ Music IOS M4A
+            debugger;
+            break;
+        default:
+            rt_data = {status: false, message: "不支持此文件格式",}
+    }
+    if (rt_data.status) {
+        rt_data.rawExt = raw_ext;
+        rt_data.rawFilename = raw_filename;
+    }
+    return rt_data;
+}

src/decrypt/mflac.js

@@ -1,21 +1,15 @@
 const musicMetadata = require("music-metadata-browser");
+const util = require("./util");
 export {Decrypt}
 
-async function Decrypt(file) {
+async function Decrypt(file, raw_filename, raw_ext) {
     // 获取扩展名
-    let filename_ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
+    if (raw_ext !== "mflac") return {
-    if (filename_ext !== "mflac") return {
         status: false,
         message: "File type is incorrect!",
     };
     // 读取文件
-    const fileBuffer = await new Promise(resolve => {
+    const fileBuffer = await util.GetArrayBuffer(file);
-        const reader = new FileReader();
-        reader.onload = (e) => {
-            resolve(e.target.result);
-        };
-        reader.readAsArrayBuffer(file);
-    });
     const audioData = new Uint8Array(fileBuffer.slice(0, -0x170));
     const audioDataLen = audioData.length;
 
@@ -34,35 +28,16 @@ async function Decrypt(file) {
 
     // 读取Meta
     let tag = await musicMetadata.parseBlob(musicData);
-
+    const info = util.GetFileInfo(tag.common.artist, tag.common.title, raw_filename, "flac");
-    // 处理无标题歌手
+    let picUrl = util.GetCoverURL(tag);
-    let filename_array = file.name.substring(0, file.name.lastIndexOf(".")).split("-");
+    // 返回
-    let title = tag.common.title;
-    let artist = tag.common.artist;
-    if (filename_array.length > 1) {
-        if (artist === undefined) artist = filename_array[0].trim();
-        if (title === undefined) title = filename_array[1].trim();
-    } else if (filename_array.length === 1) {
-        if (title === undefined) title = filename_array[0].trim();
-    }
-    const filename = artist + " - " + title + ".flac";
-    // 处理无封面
-    let pic_url = "";
-
-    if (tag.common.picture !== undefined && tag.common.picture.length >= 1) {
-        const picture = tag.common.picture[0];
-        const blobPic = new Blob([picture.data], {type: picture.format});
-        pic_url = URL.createObjectURL(blobPic);
-    }
-    // 返回*/
     return {
         status: true,
-        message: "",
+        filename: info.filename,
-        filename: filename,
+        title: info.title,
-        title: title,
+        artist: info.artist,
-        artist: artist,
         album: tag.common.album,
-        picture: pic_url,
+        picture: picUrl,
         file: musicUrl,
         mime: "audio/flac"
     }

src/decrypt/ncm.js

@@ -0,0 +1,171 @@
+const CryptoJS = require("crypto-js");
+const ID3Writer = require("browser-id3-writer");
+const util = require("./util");
+const CORE_KEY = CryptoJS.enc.Hex.parse("687a4852416d736f356b496e62617857");
+const META_KEY = CryptoJS.enc.Hex.parse("2331346C6A6B5F215C5D2630553C2728");
+
+
+export {Decrypt};
+
+async function Decrypt(file) {
+
+    const fileBuffer = await util.GetArrayBuffer(file);
+    const dataView = new DataView(fileBuffer);
+
+    if (dataView.getUint32(0, true) !== 0x4e455443 ||
+        dataView.getUint32(4, true) !== 0x4d414446)
+        return {status: false, message: "此ncm文件已损坏"};
+
+
+    const keyDataObj = getKeyData(dataView, fileBuffer, 10);
+    const keyBox = getKeyBox(keyDataObj.data);
+
+    const musicMetaObj = getMetaData(dataView, fileBuffer, keyDataObj.offset);
+    const musicMeta = musicMetaObj.data;
+
+    let audioOffset = musicMetaObj.offset + dataView.getUint32(musicMetaObj.offset + 5, true) + 13;
+    let audioData = new Uint8Array(fileBuffer, audioOffset);
+
+    for (let cur = 0; cur < audioData.length; ++cur) {
+        audioData[cur] ^= keyBox[cur & 0xff];
+    }
+
+    if (musicMeta.format === undefined) {
+        const [f, L, a, C] = audioData;
+        if (f === 0x66 && L === 0x4c && a === 0x61 && C === 0x43) {
+            musicMeta.format = "flac";
+        } else {
+            musicMeta.format = "mp3";
+        }
+    }
+    const mime = util.AudioMimeType[musicMeta.format];
+
+    const artists = [];
+    musicMeta.artist.forEach(arr => {
+        artists.push(arr[0]);
+    });
+    if (musicMeta.format === "mp3") {
+        audioData = await writeID3(audioData, artists, musicMeta.musicName, musicMeta.album, musicMeta.albumPic)
+    }
+
+    const musicData = new Blob([audioData], {type: mime});
+    const musicUrl = URL.createObjectURL(musicData);
+    const filename = artists.join(" & ") + " - " + musicMeta.musicName + "." + musicMeta.format;
+    return {
+        status: true,
+        filename: filename,
+        title: musicMeta.musicName,
+        artist: artists.join(" & "),
+        album: musicMeta.album,
+        picture: musicMeta.albumPic,
+        file: musicUrl,
+        mime: mime
+    };
+}
+
+async function writeID3(audioData, artistList, title, album, picture) {
+    const writer = new ID3Writer(audioData);
+    writer.setFrame("TPE1", artistList)
+        .setFrame("TIT2", title)
+        .setFrame("TALB", album);
+    if (picture !== "") {
+        try {
+            const img = await (await fetch(picture)).arrayBuffer();
+            writer.setFrame('APIC', {
+                type: 3,
+                data: img,
+                description: 'Cover'
+            })
+        } catch (e) {
+            console.log("Fail to write cover image!");
+        }
+    }
+    writer.addTag();
+    return writer.arrayBuffer;
+}
+
+function getKeyData(dataView, fileBuffer, offset) {
+    const keyLen = dataView.getUint32(offset, true);
+    offset += 4;
+    const cipherText = new Uint8Array(fileBuffer, offset, keyLen).map(
+        uint8 => uint8 ^ 0x64
+    );
+    offset += keyLen;
+
+    const plainText = CryptoJS.AES.decrypt(
+        {ciphertext: CryptoJS.lib.WordArray.create(cipherText)},
+        CORE_KEY,
+        {
+            mode: CryptoJS.mode.ECB,
+            padding: CryptoJS.pad.Pkcs7
+        }
+    );
+
+    const result = new Uint8Array(plainText.sigBytes);
+
+    const words = plainText.words;
+    const sigBytes = plainText.sigBytes;
+    for (let i = 0; i < sigBytes; i++) {
+        result[i] = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
+    }
+
+    return {offset: offset, data: result.slice(17)};
+}
+
+function getKeyBox(keyData) {
+    const box = new Uint8Array(Array(256).keys());
+
+    const keyDataLen = keyData.length;
+
+    let j = 0;
+
+    for (let i = 0; i < 256; i++) {
+        j = (box[i] + j + keyData[i % keyDataLen]) & 0xff;
+        [box[i], box[j]] = [box[j], box[i]];
+    }
+
+    return box.map((_, i, arr) => {
+        i = (i + 1) & 0xff;
+        const si = arr[i];
+        const sj = arr[(i + si) & 0xff];
+        return arr[(si + sj) & 0xff];
+    });
+}
+
+/**
+ * @typedef {Object} MusicMetaType
+ * @property {Number} musicId
+ * @property {String} musicName
+ * @property {[[String, Number]]} artist
+ * @property {String} album
+ * @property {"flac"|"mp3"} format
+ * @property {String} albumPic
+ */
+
+function getMetaData(dataView, fileBuffer, offset) {
+    const metaDataLen = dataView.getUint32(offset, true);
+    offset += 4;
+    if (metaDataLen === 0) {
+        return {};
+    }
+
+    const cipherText = new Uint8Array(fileBuffer, offset, metaDataLen).map(
+        data => data ^ 0x63
+    );
+    offset += metaDataLen;
+
+    const plainText = CryptoJS.AES.decrypt({
+            ciphertext: CryptoJS.enc.Base64.parse(
+                CryptoJS.lib.WordArray.create(cipherText.slice(22)).toString(CryptoJS.enc.Utf8)
+            )
+        },
+        META_KEY,
+        {mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7}
+    );
+
+    const result = JSON.parse(plainText.toString(CryptoJS.enc.Utf8).slice(6));
+    result.albumPic = result.albumPic.replace("http:", "https:");
+    return {data: result, offset: offset};
+}
+
+

src/decrypt/qmc.js

@@ -1,4 +1,5 @@
 const musicMetadata = require("music-metadata-browser");
+const util = require("./util");
 export {Decrypt}
 const SEED_MAP = [
     [0x4a, 0xd6, 0xca, 0x90, 0x67, 0xf7, 0x52],
@@ -9,17 +10,12 @@ const SEED_MAP = [
     [0x1d, 0x95, 0xde, 0x9f, 0x84, 0x11, 0xf4],
     [0x0e, 0x74, 0xbb, 0x90, 0xbc, 0x3f, 0x92],
     [0x00, 0x09, 0x5b, 0x9f, 0x62, 0x66, 0xa1]];
-const audio_mime_type = {
-    mp3: "audio/mpeg",
-    flac: "audio/flac",
-    ogg: "audio/ogg"
-};
 
-async function Decrypt(file) {
+
+async function Decrypt(file, raw_filename, raw_ext) {
     // 获取扩展名
-    let filename_ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
     let new_ext;
-    switch (filename_ext) {
+    switch (raw_ext) {
         case "qmc0":
         case "qmc3":
             new_ext = "mp3";
@@ -31,62 +27,33 @@ async function Decrypt(file) {
             new_ext = "flac";
             break;
         default:
-            return {
+            return {status: false, message: "File type is incorrect!"}
-                status: false,
-                message: "File type is incorrect!",
-            };
     }
-    const mime = audio_mime_type[new_ext];
+    const mime = util.AudioMimeType[new_ext];
     // 读取文件
-    const fileBuffer = await new Promise(resolve => {
+    const fileBuffer = await util.GetArrayBuffer(file);
-        const reader = new FileReader();
-        reader.onload = (e) => {
-            resolve(e.target.result);
-        };
-        reader.readAsArrayBuffer(file);
-    });
     const audioData = new Uint8Array(fileBuffer);
-    const audioDataLen = audioData.length;
     // 转换数据
     const seed = new Mask();
-    for (let cur = 0; cur < audioDataLen; ++cur) {
+    for (let cur = 0; cur < audioData.length; ++cur) {
         audioData[cur] ^= seed.NextMask();
     }
     // 导出
-    const musicData = new Blob([audioData], {
+    const musicData = new Blob([audioData], {type: mime});
-        type: mime
-    });
     const musicUrl = URL.createObjectURL(musicData);
     // 读取Meta
     let tag = await musicMetadata.parseBlob(musicData);
+    const info = util.GetFileInfo(tag.common.artist, tag.common.title, raw_filename, raw_ext);
+    let picUrl = util.GetCoverURL(tag);
 
-    // 处理无标题歌手
-    let filename_array = file.name.substring(0, file.name.lastIndexOf(".")).split("-");
-    let title = tag.common.title;
-    let artist = tag.common.artist;
-    if (filename_array.length > 1) {
-        if (artist === undefined) artist = filename_array[0].trim();
-        if (title === undefined) title = filename_array[1].trim();
-    } else if (filename_array.length === 1) {
-        if (title === undefined) title = filename_array[0].trim();
-    }
-    const filename = artist + " - " + title + "." + new_ext;
-    // 处理无封面
-    let pic_url = "";
-
-    if (tag.common.picture !== undefined && tag.common.picture.length >= 1) {
-        const picture = tag.common.picture[0];
-        const blobPic = new Blob([picture.data], {type: picture.format});
-        pic_url = URL.createObjectURL(blobPic);
-    }
     // 返回
     return {
         status: true,
-        filename: filename,
+        filename: info.filename,
-        title: title,
+        title: info.title,
-        artist: artist,
+        artist: info.artist,
         album: tag.common.album,
-        picture: pic_url,
+        picture: picUrl,
         file: musicUrl,
         mime: mime
     }

src/decrypt/raw.js

@@ -0,0 +1,25 @@
+const musicMetadata = require("music-metadata-browser");
+const util = require("./util");
+export {Decrypt}
+
+
+async function Decrypt(file, raw_filename, raw_ext) {
+    let tag = await musicMetadata.parseBlob(file);
+
+    let fileUrl = URL.createObjectURL(file);
+
+    const picUrl = util.GetCoverURL(tag);
+    const mime = util.AudioMimeType[raw_ext];
+    const info = util.GetFileInfo(tag.common.artist, tag.common.title, raw_filename, raw_ext);
+
+    return {
+        status: true,
+        filename: info.filename,
+        title: info.title,
+        artist: info.artist,
+        album: tag.common.album,
+        picture: picUrl,
+        file: fileUrl,
+        mime: mime
+    }
+}

src/decrypt/util.js

@@ -0,0 +1,51 @@
+export {GetArrayBuffer, GetFileInfo, GetCoverURL, AudioMimeType}
+
+// Also a new draft API: blob.arrayBuffer()
+async function GetArrayBuffer(blobObject) {
+    return await new Promise(resolve => {
+        const reader = new FileReader();
+        reader.onload = (e) => {
+            resolve(e.target.result);
+        };
+        reader.readAsArrayBuffer(blobObject);
+    });
+}
+
+const AudioMimeType = {
+    mp3: "audio/mpeg",
+    flac: "audio/flac",
+    m4a: "audio/mp4",
+    ogg: "audio/ogg"
+};
+
+function GetFileInfo(artist, title, filenameNoExt, ext) {
+    let newArtist = "", newTitle = "";
+    let filenameArray = filenameNoExt.split("-");
+    if (filenameArray.length > 1) {
+        newArtist = filenameArray[0].trim();
+        newTitle = filenameArray[1].trim();
+    } else if (filenameArray.length === 1) {
+        newTitle = filenameArray[0].trim();
+    }
+
+    if (typeof artist == "string" && artist !== "") {
+        newArtist = artist;
+    }
+    if (typeof title == "string" && title !== "") {
+        newTitle = title;
+    }
+    let newFilename = newArtist + " - " + newTitle + "." + ext;
+    return {artist: newArtist, title: newTitle, filename: newFilename};
+}
+
+/**
+ * @return {string}
+ */
+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});
+        pic_url = URL.createObjectURL(pic);
+    }
+    return pic_url;
+}

src/plugins/ncm.js

@@ -1,183 +0,0 @@
-const CryptoJS = require("crypto-js");
-const ID3Writer = require("browser-id3-writer");
-const CORE_KEY = CryptoJS.enc.Hex.parse("687a4852416d736f356b496e62617857");
-const META_KEY = CryptoJS.enc.Hex.parse("2331346C6A6B5F215C5D2630553C2728");
-
-const audio_mime_type = {
-    mp3: "audio/mpeg",
-    flac: "audio/flac"
-};
-
-export {Decrypt};
-
-async function Decrypt(file) {
-
-    const fileBuffer = await new Promise(reslove => {
-        const reader = new FileReader();
-        reader.onload = (e) => {
-            reslove(e.target.result);
-        };
-        reader.readAsArrayBuffer(file);
-    });
-
-    const dataView = new DataView(fileBuffer);
-
-    if (dataView.getUint32(0, true) !== 0x4e455443 ||
-        dataView.getUint32(4, true) !== 0x4d414446
-    ) return {
-        status: false,
-        message: "此ncm文件已损坏",
-    };
-
-    let offset = 10;
-
-    const keyData = (() => {
-        const keyLen = dataView.getUint32(offset, true);
-        offset += 4;
-        const cipherText = new Uint8Array(fileBuffer, offset, keyLen).map(
-            uint8 => uint8 ^ 0x64
-        );
-        offset += keyLen;
-
-        const plainText = CryptoJS.AES.decrypt(
-            {ciphertext: CryptoJS.lib.WordArray.create(cipherText)},
-            CORE_KEY,
-            {
-                mode: CryptoJS.mode.ECB,
-                padding: CryptoJS.pad.Pkcs7
-            }
-        );
-
-        const result = new Uint8Array(plainText.sigBytes);
-
-        const words = plainText.words;
-        const sigBytes = plainText.sigBytes;
-        for (let i = 0; i < sigBytes; i++) {
-            result[i] = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
-        }
-
-
-        return result.slice(17);
-    })();
-
-    const keyBox = (() => {
-        const box = new Uint8Array(Array(256).keys());
-
-        const keyDataLen = keyData.length;
-
-        let j = 0;
-
-        for (let i = 0; i < 256; i++) {
-            j = (box[i] + j + keyData[i % keyDataLen]) & 0xff;
-            [box[i], box[j]] = [box[j], box[i]];
-        }
-
-        return box.map((_, i, arr) => {
-            i = (i + 1) & 0xff;
-            const si = arr[i];
-            const sj = arr[(i + si) & 0xff];
-            return arr[(si + sj) & 0xff];
-        });
-    })();
-
-    /**
-     * @typedef {Object} MusicMetaType
-     * @property {Number} musicId
-     * @property {String} musicName
-     * @property {[[String, Number]]} artist
-     * @property {String} album
-     * @property {"flac"|"mp3"} format
-     * @property {String} albumPic
-     */
-
-    /** @type {MusicMetaType|undefined} */
-    const musicMeta = (() => {
-        const metaDataLen = dataView.getUint32(offset, true);
-        offset += 4;
-        if (metaDataLen === 0) {
-            return {};
-        }
-
-        const cipherText = new Uint8Array(fileBuffer, offset, metaDataLen).map(
-            data => data ^ 0x63
-        );
-        offset += metaDataLen;
-
-        const plainText = CryptoJS.AES.decrypt(
-            {
-                ciphertext: CryptoJS.enc.Base64.parse(
-                    CryptoJS.lib.WordArray.create(cipherText.slice(22)).toString(CryptoJS.enc.Utf8)
-                )
-            },
-            META_KEY,
-            {mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7}
-        );
-
-        const result = JSON.parse(plainText.toString(CryptoJS.enc.Utf8).slice(6));
-        result.albumPic = result.albumPic.replace("http:", "https:");
-        return result;
-    })();
-
-    offset += dataView.getUint32(offset + 5, true) + 13;
-
-    let audioData = new Uint8Array(fileBuffer, offset);
-    let audioDataLen = audioData.length;
-
-
-    for (let cur = 0; cur < audioDataLen; ++cur) {
-        audioData[cur] ^= keyBox[cur & 0xff];
-    }
-
-    if (musicMeta.format === undefined) {
-        const [f, L, a, C] = audioData;
-        if (f === 0x66 && L === 0x4c && a === 0x61 && C === 0x43) {
-            musicMeta.format = "flac";
-        } else {
-            musicMeta.format = "mp3";
-        }
-    }
-    const mime = audio_mime_type[musicMeta.format];
-
-    const artists = [];
-    musicMeta.artist.forEach(arr => {
-        artists.push(arr[0]);
-    });
-
-    if (musicMeta.format === "mp3") {
-        const writer = new ID3Writer(audioData);
-        writer.setFrame("TPE1", artists)
-            .setFrame("TIT2", musicMeta.musicName)
-            .setFrame("TALB", musicMeta.album);
-        if (musicMeta.albumPic !== "") {
-            try {
-                const img = await (await fetch(musicMeta.albumPic)).arrayBuffer();
-                writer.setFrame('APIC', {
-                    type: 3,
-                    data: img,
-                    description: 'Cover'
-                })
-            } catch (e) {
-                console.log("Fail to write cover image!");
-            }
-        }
-        writer.addTag();
-        audioData = writer.arrayBuffer;
-    }
-
-    const musicData = new Blob([audioData], {
-        type: mime
-    });
-    const musicUrl = URL.createObjectURL(musicData);
-    const filename = artists.join(" & ") + " - " + musicMeta.musicName + "." + musicMeta.format;
-    return {
-        status: true,
-        filename: filename,
-        title: musicMeta.musicName,
-        artist: artists.join(" & "),
-        album: musicMeta.album,
-        picture: musicMeta.albumPic,
-        file: musicUrl,
-        mime: mime
-    };
-}
-

src/plugins/raw.js

@@ -1,44 +0,0 @@
-const musicMetadata = require("music-metadata-browser");
-export {Decrypt}
-
-const audio_mime_type = {
-    mp3: "audio/mpeg",
-    flac: "audio/flac"
-};
-
-async function Decrypt(file) {
-    let tag = await musicMetadata.parseBlob(file);
-    let pic_url = "";
-    if (tag.common.picture !== undefined && tag.common.picture.length > 0) {
-        let pic = new Blob([tag.common.picture[0].data], {type: tag.common.picture[0].format});
-        pic_url = URL.createObjectURL(pic);
-    }
-
-    let file_url = URL.createObjectURL(file);
-
-    let filename_no_ext = file.name.substring(0, file.name.lastIndexOf("."));
-    let filename_array = filename_no_ext.split("-");
-    let filename_ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
-    const mime = audio_mime_type[filename_ext];
-    let title = tag.common.title;
-    let artist = tag.common.artist;
-
-    if (filename_array.length > 1) {
-        if (artist === undefined) artist = filename_array[0].trim();
-        if (title === undefined) title = filename_array[1].trim();
-    } else if (filename_array.length === 1) {
-        if (title === undefined) title = filename_array[0].trim();
-    }
-
-    const filename = artist + " - " + title + "." + filename_ext;
-    return {
-        status:true,
-        filename: filename,
-        title: title,
-        artist: artist,
-        album: tag.common.album,
-        picture: pic_url,
-        file: file_url,
-        mime: mime
-    }
-}