refactor(mediabunny): [PKG-MB-03] type inputs and cancel owned loads

packages/artplayer-proxy-mediabunny/src/hls-state.ts

@@ -0,0 +1,47 @@
+import type { InputTrack } from 'mediabunny'
+import type { PlaybackMedia } from './media'
+
+async function getTrackBitrate(track: InputTrack): Promise<number> {
+  return await track.getAverageBitrate() ?? await track.getBitrate() ?? 0
+}
+
+export async function getHlsState(media: PlaybackMedia | null) {
+  if (!media?.isHls || !media.input)
+    return null
+
+  const [videoTracks, pairableAudioTracks] = await Promise.all([
+    media.input.getVideoTracks(),
+    media.videoTrack ? media.videoTrack.getPairableAudioTracks() : [],
+  ])
+  const [levels, audios] = await Promise.all([
+    Promise.all(videoTracks.map(async (track, index) => ({
+      id: track.id,
+      track,
+      index,
+      name: await track.getName(),
+      height: await track.getDisplayHeight(),
+      bitrate: await getTrackBitrate(track),
+    }))),
+    Promise.all(pairableAudioTracks.map(async (track, index) => {
+      const name = await track.getName()
+      const language = await track.getLanguageCode()
+      return {
+        id: track.id,
+        track,
+        index,
+        name,
+        lang: language,
+        language,
+        bitrate: await getTrackBitrate(track),
+      }
+    })),
+  ])
+  return {
+    levels,
+    audios,
+    currentLevel: media.videoTrack ? levels.find(item => item.id === media.videoTrack?.id) ?? null : null,
+    currentAudio: media.audioTrack ? audios.find(item => item.id === media.audioTrack?.id) ?? null : null,
+    videoMode: media.videoMode ?? 'auto',
+    audioMode: media.audioMode ?? 'auto',
+  }
+}