89 lines
2.7 KiB
TypeScript
89 lines
2.7 KiB
TypeScript
import { AudioMimeType, GetArrayBuffer, SniffAudioExt } from '@/decrypt/utils';
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import { DecryptResult } from '@/decrypt/entity';
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import { DecryptQmcWasm } from '@/decrypt/qmc_wasm';
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import { extractQQMusicMeta } from '@/utils/qm_meta';
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interface Handler {
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ext: string;
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version: number;
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}
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export const HandlerMap: { [key: string]: Handler } = {
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mgg: { ext: 'ogg', version: 2 },
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mgg0: { ext: 'ogg', version: 2 },
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mggl: { ext: 'ogg', version: 2 },
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mgg1: { ext: 'ogg', version: 2 },
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mflac: { ext: 'flac', version: 2 },
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mflac0: { ext: 'flac', version: 2 },
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mmp4: { ext: 'mp4', version: 2 },
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// qmcflac / qmcogg:
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// 有可能是 v2 加密但混用同一个后缀名。
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qmcflac: { ext: 'flac', version: 2 },
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qmcogg: { ext: 'ogg', version: 2 },
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qmc0: { ext: 'mp3', version: 2 },
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qmc2: { ext: 'ogg', version: 2 },
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qmc3: { ext: 'mp3', version: 2 },
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qmc4: { ext: 'ogg', version: 2 },
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qmc6: { ext: 'ogg', version: 2 },
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qmc8: { ext: 'ogg', version: 2 },
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bkcmp3: { ext: 'mp3', version: 1 },
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bkcm4a: { ext: 'm4a', version: 1 },
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bkcflac: { ext: 'flac', version: 1 },
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bkcwav: { ext: 'wav', version: 1 },
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bkcape: { ext: 'ape', version: 1 },
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bkcogg: { ext: 'ogg', version: 1 },
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bkcwma: { ext: 'wma', version: 1 },
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tkm: { ext: 'm4a', version: 1 },
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'666c6163': { ext: 'flac', version: 1 },
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'6d7033': { ext: 'mp3', version: 1 },
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'6f6767': { ext: 'ogg', version: 1 },
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'6d3461': { ext: 'm4a', version: 1 },
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'776176': { ext: 'wav', version: 1 },
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};
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export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
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if (!(raw_ext in HandlerMap)) throw `Qmc cannot handle type: ${raw_ext}`;
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const handler = HandlerMap[raw_ext];
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let { version } = handler;
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const fileBuffer = await GetArrayBuffer(file);
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let musicDecoded = new Uint8Array();
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let musicID: number | string | undefined;
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if (version === 2 && globalThis.WebAssembly) {
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const v2Decrypted = await DecryptQmcWasm(fileBuffer, raw_ext);
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// 若 v2 检测失败，降级到 v1 再尝试一次
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if (v2Decrypted.success) {
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musicDecoded = v2Decrypted.data;
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musicID = v2Decrypted.songId;
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console.log('qmc wasm decoder suceeded');
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} else {
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throw new Error(v2Decrypted.error || '(unknown error)');
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}
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}
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const ext = SniffAudioExt(musicDecoded, handler.ext);
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const mime = AudioMimeType[ext];
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const { album, artist, imgUrl, blob, title } = await extractQQMusicMeta(
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new Blob([musicDecoded], { type: mime }),
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raw_filename,
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ext,
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musicID,
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);
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return {
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title: title,
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artist: artist,
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ext: ext,
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album: album,
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picture: imgUrl,
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file: URL.createObjectURL(blob),
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blob: blob,
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mime: mime,
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};
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}
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