Add OS Lyrics extension (#2656)

* draft commit

* time to fight pipeline

* round 2 changes

* remove unnecessary line

* fight taglib. again

* make taglib work again???

* add id3 tags

* taglib 1.12 vs 1.13

* use int instead for windows

* store as json now

* add migration, more tests

* support repeated line, multiline

* fix ms and support .m, .mm, .mmm

* address some concerns, make cpp a bit safer

* separate responses from model

* remove [:]

* Add trace log

* Try to unblock pipeline

* Fix merge errors

* Fix SIGSEGV error (proper handling of empty frames)

* Add fallback artist/title to structured lyrics

* Rename conflicting named vars

* Fix tests

* Do we still need ffmpeg in the pipeline?

* Revert "Do we still need ffmpeg in the pipeline?"

Yes we do.

This reverts commit 87df7f6df7.

* Does this passes now, with a newer ffmpeg version?

* Revert "Does this passes now, with a newer ffmpeg version?"

No, it does not :(

This reverts commit 372eb4b0ae.

* My OCD made me do it :P

---------

Co-authored-by: Deluan Quintão <deluan@navidrome.org>

ui/src/reducers/playerReducer.js

@@ -20,8 +20,14 @@ const initialState = {
   savedPlayIndex: 0,
 }
 
-const timestampRegex =
-  /(\[([0-9]{1,2}:)?([0-9]{1,2}:)([0-9]{1,2})(\.[0-9]{1,2})?\])/g
+const pad = (value) => {
+  const str = value.toString()
+  if (str.length === 1) {
+    return `0${str}`
+  } else {
+    return str
+  }
+}
 
 const mapToAudioLists = (item) => {
   // If item comes from a playlist, trackId is mediaFileId
@@ -40,12 +46,33 @@ const mapToAudioLists = (item) => {
   }
 
   const { lyrics } = item
+  let lyricText = ''
+
+  if (lyrics) {
+    const structured = JSON.parse(lyrics)
+    for (const structuredLyric of structured) {
+      if (structuredLyric.synced) {
+        for (const line of structuredLyric.line) {
+          let time = Math.floor(line.start / 10)
+          const ms = time % 100
+          time = Math.floor(time / 100)
+          const sec = time % 60
+          time = Math.floor(time / 60)
+          const min = time % 60
+
+          ms.toString()
+          lyricText += `[${pad(min)}:${pad(sec)}.${pad(ms)}] ${line.value}\n`
+        }
+      }
+    }
+  }
+
   return {
     trackId,
     uuid: uuidv4(),
     song: item,
     name: item.title,
-    lyric: timestampRegex.test(lyrics) ? lyrics : '',
+    lyric: lyricText,
     singer: item.artist,
     duration: item.duration,
     musicSrc: subsonic.streamUrl(trackId),