2020-07-18 13:58:07 +00:00
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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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GetWebImage,
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2020-12-05 18:16:45 +00:00
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IXAREA_API_ENDPOINT,
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WriteMp3Meta
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2020-07-18 13:58:07 +00:00
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} from "./util";
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2020-03-01 15:36:16 +00:00
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import {QmcMaskCreate58, QmcMaskDetectMflac, QmcMaskDetectMgg, QmcMaskGetDefault} from "./qmcMask";
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2020-07-16 16:33:10 +00:00
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import {fromByteArray as Base64Encode, toByteArray as Base64Decode} from 'base64-js'
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2020-02-11 06:33:45 +00:00
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2020-07-18 13:45:53 +00:00
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const MetaFlac = require('metaflac-js');
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2020-07-16 16:33:10 +00:00
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const ID3Writer = require("browser-id3-writer");
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2020-04-26 06:32:32 +00:00
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2020-07-16 16:33:10 +00:00
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const iconv = require('iconv-lite');
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const decode = iconv.decode
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2020-04-05 11:18:56 +00:00
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2019-09-07 17:50:04 +00:00
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const musicMetadata = require("music-metadata-browser");
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2020-02-11 06:33:45 +00:00
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const HandlerMap = {
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2020-02-11 06:48:27 +00:00
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"mgg": {handler: QmcMaskDetectMgg, ext: "ogg", detect: true},
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"mflac": {handler: QmcMaskDetectMflac, ext: "flac", detect: true},
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"qmc0": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
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2020-04-04 17:01:59 +00:00
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"qmc2": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
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2020-02-11 06:48:27 +00:00
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"qmc3": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
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"qmcogg": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
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"qmcflac": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
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"bkcmp3": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
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"bkcflac": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
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2020-09-19 04:03:02 +00:00
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"tkm": {handler: QmcMaskGetDefault, ext: "m4a", detect: false},
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"666c6163": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
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"6d7033": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
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"6f6767": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
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"6d3461": {handler: QmcMaskGetDefault, ext: "m4a", detect: false},
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"776176": {handler: QmcMaskGetDefault, ext: "wav", detect: false}
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2020-01-27 04:50:24 +00:00
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};
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2020-01-21 11:03:41 +00:00
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2020-02-10 16:34:26 +00:00
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export async function Decrypt(file, raw_filename, raw_ext) {
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2020-02-11 06:33:45 +00:00
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if (!(raw_ext in HandlerMap)) return {status: false, message: "File type is incorrect!"};
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const handler = HandlerMap[raw_ext];
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const fileData = new Uint8Array(await GetArrayBuffer(file));
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let audioData, seed, keyData;
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if (handler.detect) {
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2020-04-26 06:32:32 +00:00
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const keyLen = new DataView(fileData.slice(fileData.length - 4).buffer).getUint32(0, true)
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const keyPos = fileData.length - 4 - keyLen;
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audioData = fileData.slice(0, keyPos);
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2020-02-11 06:33:45 +00:00
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seed = handler.handler(audioData);
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2020-04-26 06:32:32 +00:00
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keyData = fileData.slice(keyPos, keyPos + keyLen);
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2020-02-11 06:33:45 +00:00
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if (seed === undefined) seed = await queryKeyInfo(keyData, raw_filename, raw_ext);
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2020-04-09 03:22:52 +00:00
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if (seed === undefined) return {status: false, message: raw_ext + "格式仅提供实验性支持"};
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2020-02-11 06:33:45 +00:00
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} else {
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audioData = fileData;
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seed = handler.handler(audioData);
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2019-07-05 07:05:11 +00:00
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}
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2020-04-05 09:32:19 +00:00
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let musicDecoded = seed.Decrypt(audioData);
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2020-02-11 06:33:45 +00:00
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2020-04-05 09:32:19 +00:00
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const ext = DetectAudioExt(musicDecoded, handler.ext);
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2020-02-11 07:51:07 +00:00
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const mime = AudioMimeType[ext];
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2020-04-05 09:32:19 +00:00
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let musicBlob = new Blob([musicDecoded], {type: mime});
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const musicMeta = await musicMetadata.parseBlob(musicBlob);
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2020-04-06 04:53:16 +00:00
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for (let metaIdx in musicMeta.native) {
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if (musicMeta.native[metaIdx].some(item => item.id === "TCON" && item.value === "(12)")) {
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2020-08-03 06:03:10 +00:00
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console.warn("The metadata is using gbk encoding")
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2020-04-06 04:53:16 +00:00
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musicMeta.common.artist = decode(musicMeta.common.artist, "gbk");
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musicMeta.common.title = decode(musicMeta.common.title, "gbk");
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musicMeta.common.album = decode(musicMeta.common.album, "gbk");
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}
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2020-04-05 11:18:56 +00:00
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}
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2020-04-06 04:53:16 +00:00
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2020-04-05 09:32:19 +00:00
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const info = GetFileInfo(musicMeta.common.artist, musicMeta.common.title, raw_filename);
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2020-02-11 06:33:45 +00:00
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if (handler.detect) reportKeyUsage(keyData, seed.Matrix128,
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2020-04-05 09:32:19 +00:00
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info.artist, info.title, musicMeta.common.album, raw_filename, raw_ext);
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let imgUrl = GetMetaCoverURL(musicMeta);
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if (imgUrl === "") {
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imgUrl = await queryAlbumCoverImage(info.artist, info.title, musicMeta.common.album);
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2020-07-16 16:33:10 +00:00
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if (imgUrl !== "") {
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const imageInfo = await GetWebImage(imgUrl);
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if (imageInfo.url !== "") {
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imgUrl = imageInfo.url
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2020-07-31 17:10:27 +00:00
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try {
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if (ext === "mp3") {
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2020-12-05 18:16:45 +00:00
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musicDecoded = await WriteMp3Meta(musicDecoded,
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info.artist.split(" _ "), info.title, "",
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imageInfo.buffer, "Cover", musicMeta)
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2020-07-31 17:10:27 +00:00
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musicBlob = new Blob([musicDecoded], {type: mime});
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} else if (ext === 'flac') {
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const writer = new MetaFlac(Buffer.from(musicDecoded))
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writer.importPictureFromBuffer(Buffer.from(imageInfo.buffer))
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musicDecoded = writer.save()
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musicBlob = new Blob([musicDecoded], {type: mime});
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2020-12-05 18:32:57 +00:00
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} else {
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console.info("writing metadata for " + ext + " is not being supported for now")
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2020-07-31 17:10:27 +00:00
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}
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} catch (e) {
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console.warn("Error while appending cover image to file " + e)
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2020-07-16 16:33:10 +00:00
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}
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}
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}
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2020-04-05 09:32:19 +00:00
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}
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2019-07-05 07:05:11 +00:00
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return {
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2020-01-21 11:03:41 +00:00
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status: true,
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title: info.title,
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artist: info.artist,
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2020-02-11 07:51:07 +00:00
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ext: ext,
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2020-04-05 09:32:19 +00:00
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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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2019-07-05 07:05:11 +00:00
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mime: mime
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}
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}
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2020-02-11 06:33:45 +00:00
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function reportKeyUsage(keyData, maskData, artist, title, album, filename, format) {
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2020-07-18 13:58:07 +00:00
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fetch(IXAREA_API_ENDPOINT + "/qmcmask/usage", {
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2020-02-11 06:33:45 +00:00
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method: "POST",
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headers: {"Content-Type": "application/json"},
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body: JSON.stringify({
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2020-04-26 06:32:32 +00:00
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Mask: Base64Encode(new Uint8Array(maskData)), Key: Base64Encode(keyData),
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2020-02-11 06:33:45 +00:00
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Artist: artist, Title: title, Album: album, Filename: filename, Format: format
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}),
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}).then().catch()
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}
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async function queryKeyInfo(keyData, filename, format) {
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try {
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2020-07-18 13:58:07 +00:00
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const resp = await fetch(IXAREA_API_ENDPOINT + "/qmcmask/query", {
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2020-02-11 06:33:45 +00:00
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method: "POST",
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headers: {"Content-Type": "application/json"},
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2020-04-26 06:32:32 +00:00
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body: JSON.stringify({Format: format, Key: Base64Encode(keyData), Filename: filename, Type: 44}),
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2020-02-11 06:33:45 +00:00
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});
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let data = await resp.json();
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2020-04-26 06:32:32 +00:00
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return QmcMaskCreate58(Base64Decode(data.Matrix44));
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2020-02-11 06:33:45 +00:00
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} catch (e) {
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2020-04-26 03:13:50 +00:00
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console.log(e);
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2020-02-11 06:33:45 +00:00
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}
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}
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2020-04-05 09:32:19 +00:00
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async function queryAlbumCoverImage(artist, title, album) {
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2020-07-18 13:58:07 +00:00
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const song_query_url = IXAREA_API_ENDPOINT + "/music/qq-cover"
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2020-04-05 09:32:19 +00:00
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try {
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2020-07-18 14:43:25 +00:00
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const params = {Artist: artist, Title: title, Album: album};
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let _url = song_query_url + "?";
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for (let pKey in params) {
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_url += pKey + "=" + encodeURIComponent(params[pKey]) + "&"
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}
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const resp = await fetch(_url)
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2020-07-18 13:45:53 +00:00
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if (resp.ok) {
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let data = await resp.json();
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return song_query_url + "/" + data.Type + "/" + data.Id
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2020-04-05 09:32:19 +00:00
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}
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2020-07-18 13:45:53 +00:00
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} catch (e) {
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console.log(e);
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2020-04-05 09:32:19 +00:00
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}
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2020-07-18 13:45:53 +00:00
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return "";
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2020-04-23 10:15:47 +00:00
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}
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