refactor(typescript): .xm & .kgm

src/decrypt/kgm.ts

@@ -7,6 +7,7 @@ import {
     SniffAudioExt
 } from "@/decrypt/utils.ts";
 import {parseBlob as metaParseBlob} from "music-metadata-browser";
+import {DecryptResult} from "@/decrypt/entity";
 
 const VprHeader = [
     0x05, 0x28, 0xBC, 0x96, 0xE9, 0xE4, 0x5A, 0x43,
@@ -14,27 +15,22 @@ const VprHeader = [
 const KgmHeader = [
     0x7C, 0xD5, 0x32, 0xEB, 0x86, 0x02, 0x7F, 0x4B,
     0xA8, 0xAF, 0xA6, 0x8E, 0x0F, 0xFF, 0x99, 0x14]
-const VprMaskDiff = [0x25, 0xDF, 0xE8, 0xA6, 0x75, 0x1E, 0x75, 0x0E,
+const VprMaskDiff = [
+    0x25, 0xDF, 0xE8, 0xA6, 0x75, 0x1E, 0x75, 0x0E,
     0x2F, 0x80, 0xF3, 0x2D, 0xB8, 0xB6, 0xE3, 0x11,
     0x00]
 
-export async function Decrypt(file, raw_filename, raw_ext) {
-    try {
-        if (window.location.protocol === "file:") {
-            return {
-                status: false,
-                message: "请使用<a target='_blank' href='https://github.com/ix64/unlock-music/wiki/其他音乐格式工具'>CLI版本</a>进行解锁"
-            }
-        }
-    } catch {
+
+export async function Decrypt(file: File, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
+    if (window?.location?.protocol === "file:") {
+        throw Error("请使用 <a target='_blank' href='https://github.com/unlock-music/cli'>CLI版本</a> 进行解锁")
     }
+
     const oriData = new Uint8Array(await GetArrayBuffer(file));
     if (raw_ext === "vpr") {
-        if (!BytesHasPrefix(oriData, VprHeader))
-            return {status: false, message: "Not a valid vpr file!"}
+        if (!BytesHasPrefix(oriData, VprHeader)) throw Error("Not a valid vpr file!")
     } else {
-        if (!BytesHasPrefix(oriData, KgmHeader))
-            return {status: false, message: "Not a valid kgm/kgma file!"}
+        if (!BytesHasPrefix(oriData, KgmHeader)) throw Error("Not a valid kgm(a) file!")
     }
     let bHeaderLen = new DataView(oriData.slice(0x10, 0x14).buffer)
     let headerLen = bHeaderLen.getUint32(0, true)
@@ -42,18 +38,13 @@ export async function Decrypt(file, raw_filename, raw_ext) {
     let audioData = oriData.slice(headerLen)
     let dataLen = audioData.length
     if (audioData.byteLength > 1 << 26) {
-        return {
-            status: false,
-            message: "文件过大，请使用<a target='_blank' href='https://github.com/ix64/unlock-music/wiki/其他音乐格式工具'>CLI版本</a>进行解锁"
-        }
+        throw Error("文件过大，请使用 <a target='_blank' href='https://github.com/unlock-music/cli'>CLI版本</a> 进行解锁")
     }
 
     let key1 = new Uint8Array(17)
     key1.set(oriData.slice(0x1c, 0x2c), 0)
-    if (MaskV2 == null) {
-        if (!await LoadMaskV2()) {
-            return {status: false, message: "加载Kgm/Vpr Mask数据失败"}
-        }
+    if (MaskV2.length === 0) {
+        if (!await LoadMaskV2()) throw Error("加载Kgm/Vpr Mask数据失败")
     }
 
     for (let i = 0; i < dataLen; i++) {
@@ -85,17 +76,16 @@ export async function Decrypt(file, raw_filename, raw_ext) {
     }
 }
 
-function GetMask(pos) {
+
+function GetMask(pos: number) {
     return MaskV2PreDef[pos % 272] ^ MaskV2[pos >> 4]
 }
 
-let MaskV2 = null;
+let MaskV2: Uint8Array = new Uint8Array(0);
 
-async function LoadMaskV2() {
+async function LoadMaskV2(): Promise<boolean> {
     try {
-        let resp = await fetch("./static/kgm.mask", {
-            method: "GET"
-        })
+        const resp = await fetch("./static/kgm.mask", {method: "GET"})
         MaskV2 = new Uint8Array(await resp.arrayBuffer());
         return true
     } catch (e) {

src/decrypt/ncm.js

@@ -1,4 +1,11 @@
-import {AudioMimeType, BytesHasPrefix, GetArrayBuffer, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils.ts";
+import {
+    AudioMimeType,
+    BytesHasPrefix,
+    GetArrayBuffer,
+    GetImageFromURL,
+    GetMetaFromFile,
+    SniffAudioExt
+} from "@/decrypt/utils.ts";
 import {parseBlob as metaParseBlob} from "music-metadata-browser";
 
 const CryptoJS = require("crypto-js");
@@ -10,7 +17,6 @@ const MagicHeader = [0x43, 0x54, 0x45, 0x4E, 0x46, 0x44, 0x41, 0x4D];
 import jimp from 'jimp';
 
 import {
-    GetWebImage,
     WriteMp3Meta
 } from "./util"
 
@@ -41,8 +47,8 @@ export async function Decrypt(file, raw_filename, _) {
 
     if (musicMeta.format === undefined) musicMeta.format = SniffAudioExt(audioData);
 
-    const imageInfo = await GetWebImage(musicMeta.albumPic);
-    while (!!imageInfo.buffer && imageInfo.buffer.byteLength >= 16 * 1024 * 1024) {
+    const imageInfo = await GetImageFromURL(musicMeta.albumPic);
+    while (imageInfo && imageInfo.buffer.byteLength >= 1 << 24) {
         let img = await jimp.read(imageInfo.buffer)
         await img.resize(Math.round(img.getHeight() / 2), jimp.AUTO)
         imageInfo.buffer = await img.getBufferAsync("image/jpeg")

src/decrypt/qmc.js

@@ -1,11 +1,17 @@
 import {
-    GetWebImage,
     IXAREA_API_ENDPOINT,
     WriteMp3Meta
 } from "./util";
 import {QmcMaskCreate58, QmcMaskDetectMflac, QmcMaskDetectMgg, QmcMaskGetDefault} from "./qmcMask";
 import {fromByteArray as Base64Encode, toByteArray as Base64Decode} from 'base64-js'
-import {AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils.ts";
+import {
+    AudioMimeType,
+    GetArrayBuffer,
+    GetCoverFromFile,
+    GetImageFromURL,
+    GetMetaFromFile,
+    SniffAudioExt
+} from "@/decrypt/utils.ts";
 import {parseBlob as metaParseBlob} from "music-metadata-browser";
 
 const MetaFlac = require('metaflac-js');
@@ -75,8 +81,8 @@ export async function Decrypt(file, raw_filename, raw_ext) {
     if (!imgUrl) {
         imgUrl = await queryAlbumCoverImage(info.artist, info.title, musicMeta.common.album);
         if (imgUrl !== "") {
-            const imageInfo = await GetWebImage(imgUrl);
-            if (imageInfo.url !== "") {
+            const imageInfo = await GetImageFromURL(imgUrl);
+            if (imageInfo) {
                 imgUrl = imageInfo.url
                 try {
                     if (ext === "mp3") {

src/decrypt/util.js

@@ -4,21 +4,6 @@ const ID3Writer = require("browser-id3-writer");
 export const IXAREA_API_ENDPOINT = "https://stats.ixarea.com/apis"
 
 
-export async function GetWebImage(pic_url) {
-    try {
-        let resp = await fetch(pic_url);
-        let mime = resp.headers.get("Content-Type");
-        if (mime.startsWith("image/")) {
-            let buf = await resp.arrayBuffer();
-            let objBlob = new Blob([buf], {type: mime});
-            let objUrl = URL.createObjectURL(objBlob);
-            return {"buffer": buf, "src": pic_url, "url": objUrl, "type": mime};
-        }
-    } catch (e) {
-    }
-    return {"buffer": null, "src": pic_url, "url": "", "type": ""}
-}
-
 export async function WriteMp3Meta(audioData, artistList, title, album, pictureData = null, pictureDesc = "Cover", originalMeta = null) {
     const writer = new ID3Writer(audioData);
     if (originalMeta !== null) {

src/decrypt/utils.ts

@@ -89,3 +89,18 @@ export function GetMetaFromFile(filename: string, exist_title?: string, exist_ar
     }
     return meta
 }
+
+export async function GetImageFromURL(src: string):
+    Promise<{ mime: string; buffer: ArrayBuffer; url: string } | undefined> {
+    try {
+        const resp = await fetch(src);
+        const mime = resp.headers.get("Content-Type");
+        if (mime?.startsWith("image/")) {
+            const buffer = await resp.arrayBuffer();
+            const url = URL.createObjectURL(new Blob([buffer], {type: mime}))
+            return {buffer, url, mime}
+        }
+    } catch (e) {
+        console.warn(e)
+    }
+}

src/decrypt/xm.ts

@@ -1,22 +1,23 @@
-import {Decrypt as RawDecrypt} from "./raw";
+import {Decrypt as RawDecrypt} from "@/decrypt/raw";
+import {DecryptResult} from "@/decrypt/entity";
 import {AudioMimeType, BytesHasPrefix, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile} from "@/decrypt/utils.ts";
 
 import {parseBlob as metaParseBlob} from "music-metadata-browser";
 
 const MagicHeader = [0x69, 0x66, 0x6D, 0x74]
 const MagicHeader2 = [0xfe, 0xfe, 0xfe, 0xfe]
-const FileTypeMap = {
+const FileTypeMap: { [key: string]: string } = {
     " WAV": ".wav",
     "FLAC": ".flac",
     " MP3": ".mp3",
     " A4M": ".m4a",
 }
 
-export async function Decrypt(file, raw_filename, raw_ext) {
+export async function Decrypt(file: File, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
     const oriData = new Uint8Array(await GetArrayBuffer(file));
     if (!BytesHasPrefix(oriData, MagicHeader) || !BytesHasPrefix(oriData.slice(8, 12), MagicHeader2)) {
         if (raw_ext === "xm") {
-            return {status: false, message: "此xm文件已损坏"}
+            throw Error("此xm文件已损坏")
         } else {
             return await RawDecrypt(file, raw_filename, raw_ext, true)
         }
@@ -24,7 +25,7 @@ export async function Decrypt(file, raw_filename, raw_ext) {
 
     let typeText = (new TextDecoder()).decode(oriData.slice(4, 8))
     if (!FileTypeMap.hasOwnProperty(typeText)) {
-        return {status: false, message: "未知的xm文件类型"}
+        throw Error("未知的.xm文件类型")
     }
 
     let key = oriData[0xf]