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forked from um/web

Add Support For Xiami .xm Files!

This commit is contained in:
MengYX 2020-04-23 20:46:08 +08:00
parent f2ea85bae9
commit 2526adcab0
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GPG Key ID: E63F9C7303E8F604
3 changed files with 88 additions and 7 deletions

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@ -1,5 +1,6 @@
const NcmDecrypt = require("./ncm");
const KwmDecrypt = require("./kwm");
const XmDecrypt = require("./xm");
const QmcDecrypt = require("./qmc");
const RawDecrypt = require("./raw");
const TmDecrypt = require("./tm");
@ -12,12 +13,16 @@ export async function CommonDecrypt(file) {
case "ncm":// Netease Mp3/Flac
rt_data = await NcmDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
break;
case "kwm"://Kuwo Mp3/Flac
case "kwm":// Kuwo Mp3/Flac
rt_data = await KwmDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
break
case "mp3":// Raw Mp3
case "flac"://Raw Flac
case "m4a":// Raw M4a
case "xm": // Xiami Wav/M4a/Mp3/Flac
case "wav":// Xiami/Raw Wav
case "mp3":// Xiami/Raw Mp3
case "flac":// Xiami/Raw Flac
case "m4a":// Xiami/Raw M4a
rt_data = await XmDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
break;
case "ogg":// Raw Ogg
rt_data = await RawDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
break;

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@ -7,11 +7,14 @@ export const WMA_HEADER = [
0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11,
0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C,
]
export const WAV_HEADER = [0x52, 0x49, 0x46, 0x46]
export const AudioMimeType = {
mp3: "audio/mpeg",
flac: "audio/flac",
m4a: "audio/mp4",
ogg: "audio/ogg"
ogg: "audio/ogg",
wma: "audio/x-ms-wma",
wav: "audio/x-wav"
};
// Also a new draft API: blob.arrayBuffer()
@ -25,9 +28,9 @@ export async function GetArrayBuffer(blobObject) {
});
}
export function GetFileInfo(artist, title, filenameNoExt) {
export function GetFileInfo(artist, title, filenameNoExt, separator = "-") {
let newArtist = "", newTitle = "";
let filenameArray = filenameNoExt.split("-");
let filenameArray = filenameNoExt.split(separator);
if (filenameArray.length > 1) {
newArtist = filenameArray[0].trim();
newTitle = filenameArray[1].trim();
@ -68,6 +71,7 @@ export function DetectAudioExt(data, fallbackExt) {
if (IsBytesEqual(OGG_HEADER, data.slice(0, OGG_HEADER.length))) return "ogg";
if (IsBytesEqual(M4A_HEADER, data.slice(4, 4 + M4A_HEADER.length))) return "m4a";
if (IsBytesEqual(WMA_HEADER, data.slice(0, WMA_HEADER.length))) return "wma";
if (IsBytesEqual(WAV_HEADER, data.slice(0, WAV_HEADER.length))) return "wav";
return fallbackExt;
}

72
src/decrypt/xm.js Normal file
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@ -0,0 +1,72 @@
import {
AudioMimeType,
DetectAudioExt,
GetArrayBuffer,
GetFileInfo,
GetMetaCoverURL,
IsBytesEqual
} from "./util";
import {Decrypt as RawDecrypt} from "./raw";
const musicMetadata = require("music-metadata-browser");
const MagicHeader = [0x69, 0x66, 0x6D, 0x74]
const MagicHeader2 = [0xfe, 0xfe, 0xfe, 0xfe]
const FileTypeMap = {
" WAV": ".wav",
"FLAC": ".flac",
" MP3": ".mp3",
" A4M": ".m4a",
}
export async function Decrypt(file, raw_filename, raw_ext) {
const oriData = new Uint8Array(await GetArrayBuffer(file));
if (!IsBytesEqual(MagicHeader, oriData.slice(0, 4)) ||
!IsBytesEqual(MagicHeader2, oriData.slice(8, 12))) {
if (raw_ext === "xm") {
return {status: false, message: "Not a valid xm file!"}
} else {
return await RawDecrypt(file, raw_filename, raw_ext, true)
}
}
let typeText = (new TextDecoder()).decode(oriData.slice(4, 8))
if (!FileTypeMap.hasOwnProperty(typeText)) {
return {status: false, message: "New Xiami file category!"}
}
let key = oriData[0xf]
let dataOffset = oriData[0xc] | oriData[0xd] << 8
let audioData = oriData.slice(0x10);
let lenAudioData = audioData.length;
for (let cur = dataOffset; cur < lenAudioData; ++cur)
audioData[cur] = (audioData[cur] - key) ^ 0xff;
const ext = DetectAudioExt(audioData, "mp3");
const mime = AudioMimeType[ext];
let musicBlob = new Blob([audioData], {type: mime});
const musicMeta = await musicMetadata.parseBlob(musicBlob);
if (ext === "wav") {
//todo:未知的编码方式
musicMeta.common.album = "";
musicMeta.common.artist = "";
musicMeta.common.title = "";
}
const info = GetFileInfo(musicMeta.common.artist, musicMeta.common.title, raw_filename, "_");
const imgUrl = GetMetaCoverURL(musicMeta);
return {
status: true,
title: info.title,
artist: info.artist,
ext: ext,
album: musicMeta.common.album,
picture: imgUrl,
file: URL.createObjectURL(musicBlob),
mime: mime
}
}