v2.0.0

src/main/modules/winMain/rendererEvent/kw_decodeLyric.ts

@@ -0,0 +1,50 @@
+import { inflate } from 'zlib'
+import iconv from 'iconv-lite'
+import { mainHandle } from '@common/mainIpc'
+import { WIN_MAIN_RENDERER_EVENT_NAME } from '@common/ipcNames'
+
+const handleInflate = async(data: Buffer) => {
+  return await new Promise((resolve: (result: Buffer) => void, reject) => {
+    inflate(data, (err, result) => {
+      if (err) return reject(err)
+      resolve(result)
+    })
+  })
+}
+
+const buf_key = Buffer.from('yeelion')
+const buf_key_len = buf_key.length
+
+const decodeLyric = async(buf: Buffer, isGetLyricx: boolean) => {
+  // const info = buf.slice(0, index).toString()
+  // if (!info.startsWith('tp=content')) return null
+  // const isLyric = info.includes('\r\nlrcx=0\r\n')
+  if (buf.toString('utf8', 0, 10) != 'tp=content') return ''
+  // const index = buf.indexOf('\r\n\r\n') + 4
+  const lrcData = await handleInflate(buf.slice(buf.indexOf('\r\n\r\n') + 4))
+
+  if (!isGetLyricx) return iconv.decode(lrcData, 'gb18030')
+
+  const buf_str = Buffer.from(lrcData.toString(), 'base64')
+  const buf_str_len = buf_str.length
+  const output = new Uint16Array(buf_str_len)
+  let i = 0
+  while (i < buf_str_len) {
+    let j = 0
+    while (j < buf_key_len && i < buf_str_len) {
+      output[i] = buf_str[i] ^ buf_key[j]
+      i++
+      j++
+    }
+  }
+
+  return iconv.decode(Buffer.from(output), 'gb18030')
+}
+
+
+export default () => {
+  mainHandle<{ lrcBase64: string, isGetLyricx: boolean }, string>(WIN_MAIN_RENDERER_EVENT_NAME.handle_kw_decode_lyric, async({ params: { lrcBase64, isGetLyricx } }) => {
+    const lrc = await decodeLyric(Buffer.from(lrcBase64, 'base64'), isGetLyricx)
+    return Buffer.from(lrc).toString('base64')
+  })
+}