forked from um/web
Add Support For Xiami .xm Files!
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@ -1,5 +1,6 @@
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const NcmDecrypt = require("./ncm");
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const KwmDecrypt = require("./kwm");
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const XmDecrypt = require("./xm");
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const QmcDecrypt = require("./qmc");
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const RawDecrypt = require("./raw");
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const TmDecrypt = require("./tm");
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@ -15,9 +16,13 @@ export async function CommonDecrypt(file) {
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case "kwm":// Kuwo Mp3/Flac
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rt_data = await KwmDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
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break
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case "mp3":// Raw Mp3
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case "flac"://Raw Flac
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case "m4a":// Raw M4a
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case "xm": // Xiami Wav/M4a/Mp3/Flac
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case "wav":// Xiami/Raw Wav
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case "mp3":// Xiami/Raw Mp3
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case "flac":// Xiami/Raw Flac
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case "m4a":// Xiami/Raw M4a
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rt_data = await XmDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
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break;
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case "ogg":// Raw Ogg
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rt_data = await RawDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
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break;
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@ -7,11 +7,14 @@ export const WMA_HEADER = [
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0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11,
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0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C,
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]
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export const WAV_HEADER = [0x52, 0x49, 0x46, 0x46]
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export const AudioMimeType = {
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mp3: "audio/mpeg",
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flac: "audio/flac",
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m4a: "audio/mp4",
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ogg: "audio/ogg"
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ogg: "audio/ogg",
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wma: "audio/x-ms-wma",
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wav: "audio/x-wav"
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};
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// Also a new draft API: blob.arrayBuffer()
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@ -25,9 +28,9 @@ export async function GetArrayBuffer(blobObject) {
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});
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}
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export function GetFileInfo(artist, title, filenameNoExt) {
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export function GetFileInfo(artist, title, filenameNoExt, separator = "-") {
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let newArtist = "", newTitle = "";
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let filenameArray = filenameNoExt.split("-");
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let filenameArray = filenameNoExt.split(separator);
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if (filenameArray.length > 1) {
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newArtist = filenameArray[0].trim();
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newTitle = filenameArray[1].trim();
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@ -68,6 +71,7 @@ export function DetectAudioExt(data, fallbackExt) {
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if (IsBytesEqual(OGG_HEADER, data.slice(0, OGG_HEADER.length))) return "ogg";
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if (IsBytesEqual(M4A_HEADER, data.slice(4, 4 + M4A_HEADER.length))) return "m4a";
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if (IsBytesEqual(WMA_HEADER, data.slice(0, WMA_HEADER.length))) return "wma";
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if (IsBytesEqual(WAV_HEADER, data.slice(0, WAV_HEADER.length))) return "wav";
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return fallbackExt;
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}
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72
src/decrypt/xm.js
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72
src/decrypt/xm.js
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@ -0,0 +1,72 @@
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import {
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AudioMimeType,
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DetectAudioExt,
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GetArrayBuffer,
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GetFileInfo,
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GetMetaCoverURL,
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IsBytesEqual
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} from "./util";
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import {Decrypt as RawDecrypt} from "./raw";
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const musicMetadata = require("music-metadata-browser");
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const MagicHeader = [0x69, 0x66, 0x6D, 0x74]
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const MagicHeader2 = [0xfe, 0xfe, 0xfe, 0xfe]
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const FileTypeMap = {
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" WAV": ".wav",
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"FLAC": ".flac",
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" MP3": ".mp3",
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" A4M": ".m4a",
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}
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export async function Decrypt(file, raw_filename, raw_ext) {
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const oriData = new Uint8Array(await GetArrayBuffer(file));
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if (!IsBytesEqual(MagicHeader, oriData.slice(0, 4)) ||
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!IsBytesEqual(MagicHeader2, oriData.slice(8, 12))) {
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if (raw_ext === "xm") {
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return {status: false, message: "Not a valid xm file!"}
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} else {
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return await RawDecrypt(file, raw_filename, raw_ext, true)
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}
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}
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let typeText = (new TextDecoder()).decode(oriData.slice(4, 8))
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if (!FileTypeMap.hasOwnProperty(typeText)) {
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return {status: false, message: "New Xiami file category!"}
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}
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let key = oriData[0xf]
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let dataOffset = oriData[0xc] | oriData[0xd] << 8
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let audioData = oriData.slice(0x10);
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let lenAudioData = audioData.length;
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for (let cur = dataOffset; cur < lenAudioData; ++cur)
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audioData[cur] = (audioData[cur] - key) ^ 0xff;
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const ext = DetectAudioExt(audioData, "mp3");
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const mime = AudioMimeType[ext];
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let musicBlob = new Blob([audioData], {type: mime});
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const musicMeta = await musicMetadata.parseBlob(musicBlob);
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if (ext === "wav") {
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//todo:未知的编码方式
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musicMeta.common.album = "";
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musicMeta.common.artist = "";
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musicMeta.common.title = "";
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}
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const info = GetFileInfo(musicMeta.common.artist, musicMeta.common.title, raw_filename, "_");
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const imgUrl = GetMetaCoverURL(musicMeta);
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return {
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status: true,
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title: info.title,
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artist: info.artist,
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ext: ext,
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album: musicMeta.common.album,
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picture: imgUrl,
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file: URL.createObjectURL(musicBlob),
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mime: mime
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}
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}
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