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refactor(qmc): extract qm meta code to utils 

(cherry picked from commit b6497e2bd3679e0e62bd6a90bdac16fa7c7f1b4e)
This commit is contained in:
Jixun Wu 2021-12-21 22:34:18 +00:00 committed by MengYX
parent 57d2244c28
commit 4ae92cd630
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GPG Key ID: E63F9C7303E8F604
2 changed files with 83 additions and 67 deletions
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79
src/decrypt/qmc.ts
View File

@ -1,21 +1,10 @@
import { QmcMapCipher, QmcRC4Cipher, QmcStaticCipher, QmcStreamCipher } from './qmc_cipher';
import {
AudioMimeType,
GetArrayBuffer,
GetCoverFromFile,
GetImageFromURL,
GetMetaFromFile,
SniffAudioExt,
WriteMetaToFlac,
WriteMetaToMp3,
} from '@/decrypt/utils';
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
import { AudioMimeType, GetArrayBuffer, SniffAudioExt } from '@/decrypt/utils';
import { DecryptQMCWasm } from './qmc_wasm';
import iconv from 'iconv-lite';
import { DecryptResult } from '@/decrypt/entity';
import { queryAlbumCover } from '@/utils/api';
import { QmcDeriveKey } from '@/decrypt/qmc_key';
import { extractQQMusicMeta } from '@/utils/qm_meta';
interface Handler {
ext: string;
@ -72,68 +61,24 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
const ext = SniffAudioExt(musicDecoded, handler.ext);
const mime = AudioMimeType[ext];
let musicBlob = new Blob([musicDecoded], { type: mime });
const { album, artist, imgUrl, blob, title } = await extractQQMusicMeta(
new Blob([musicDecoded], { type: mime }),
raw_filename,
ext,
);
const musicMeta = await metaParseBlob(musicBlob);
for (let metaIdx in musicMeta.native) {
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 = iconv.decode(new Buffer(musicMeta.common.artist ?? ''), 'gbk');
musicMeta.common.title = iconv.decode(new Buffer(musicMeta.common.title ?? ''), 'gbk');
musicMeta.common.album = iconv.decode(new Buffer(musicMeta.common.album ?? ''), 'gbk');
}
}
const info = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist);
let imgUrl = GetCoverFromFile(musicMeta);
if (!imgUrl) {
imgUrl = await getCoverImage(info.title, info.artist, musicMeta.common.album);
if (imgUrl) {
const imageInfo = await GetImageFromURL(imgUrl);
if (imageInfo) {
imgUrl = imageInfo.url;
try {
const newMeta = { picture: imageInfo.buffer, title: info.title, artists: info.artist?.split(' _ ') };
if (ext === 'mp3') {
musicDecoded = WriteMetaToMp3(Buffer.from(musicDecoded), newMeta, musicMeta);
musicBlob = new Blob([musicDecoded], { type: mime });
} else if (ext === 'flac') {
musicDecoded = WriteMetaToFlac(Buffer.from(musicDecoded), newMeta, musicMeta);
musicBlob = new Blob([musicDecoded], { type: mime });
} else {
console.info('writing metadata for ' + ext + ' is not being supported for now');
}
} catch (e) {
console.warn('Error while appending cover image to file ' + e);
}
}
}
}
return {
title: info.title,
artist: info.artist,
title: title,
artist: artist,
ext: ext,
album: musicMeta.common.album,
album: album,
picture: imgUrl,
file: URL.createObjectURL(musicBlob),
blob: musicBlob,
file: URL.createObjectURL(blob),
blob: blob,
mime: mime,
};
}
async function getCoverImage(title: string, artist?: string, album?: string): Promise<string> {
const song_query_url = 'https://stats.ixarea.com/apis' + '/music/qq-cover';
try {
const data = await queryAlbumCover(title, artist, album);
return `${song_query_url}/${data.Type}/${data.Id}`;
} catch (e) {
console.warn(e);
}
return '';
}
export class QmcDecoder {
private static readonly BYTE_COMMA = ','.charCodeAt(0);
file: Uint8Array;

71
src/utils/qm_meta.ts Normal file
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@ -0,0 +1,71 @@
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
import iconv from 'iconv-lite';
import {
GetCoverFromFile,
GetImageFromURL,
GetMetaFromFile,
WriteMetaToFlac,
WriteMetaToMp3,
AudioMimeType,
} from '@/decrypt/utils';
import { queryAlbumCover } from '@/utils/api';
export async function extractQQMusicMeta(musicBlob: Blob, name: string, ext: string) {
const musicMeta = await metaParseBlob(musicBlob);
for (let metaIdx in musicMeta.native) {
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 = iconv.decode(new Buffer(musicMeta.common.artist ?? ''), 'gbk');
musicMeta.common.title = iconv.decode(new Buffer(musicMeta.common.title ?? ''), 'gbk');
musicMeta.common.album = iconv.decode(new Buffer(musicMeta.common.album ?? ''), 'gbk');
}
}
const info = GetMetaFromFile(name, musicMeta.common.title, musicMeta.common.artist);
let imgUrl = GetCoverFromFile(musicMeta);
if (!imgUrl) {
imgUrl = await getCoverImage(info.title, info.artist, musicMeta.common.album);
if (imgUrl) {
const imageInfo = await GetImageFromURL(imgUrl);
if (imageInfo) {
imgUrl = imageInfo.url;
try {
const newMeta = { picture: imageInfo.buffer, title: info.title, artists: info.artist?.split(' _ ') };
const buffer = Buffer.from(await musicBlob.arrayBuffer());
const mime = AudioMimeType[ext] || AudioMimeType.mp3;
if (ext === 'mp3') {
musicBlob = new Blob([WriteMetaToMp3(buffer, newMeta, musicMeta)], { type: mime });
} else if (ext === 'flac') {
musicBlob = new Blob([WriteMetaToFlac(buffer, newMeta, musicMeta)], { type: mime });
} else {
console.info('writing metadata for ' + ext + ' is not being supported for now');
}
} catch (e) {
console.warn('Error while appending cover image to file ' + e);
}
}
}
}
return {
title: info.title,
artist: info.artist,
album: musicMeta.common.album,
imgUrl: imgUrl,
blob: musicBlob,
};
}
async function getCoverImage(title: string, artist?: string, album?: string): Promise<string> {
const song_query_url = 'https://stats.ixarea.com/apis' + '/music/qq-cover';
try {
const data = await queryAlbumCover(title, artist, album);
return `${song_query_url}/${data.Type}/${data.Id}`;
} catch (e) {
console.warn(e);
}
return '';
}