Add convertPlaylistsToDataUrls util

src/utils/playlist.ts

@@ -0,0 +1,23 @@
+import { parse, stringify } from 'hls-parser';
+import { MasterPlaylist } from 'hls-parser/types';
+
+import { UseableFetcher } from '@/fetchers/types';
+
+export async function convertPlaylistsToDataUrls(
+  fetcher: UseableFetcher,
+  playlistUrl: string,
+  headers?: Record<string, string>,
+) {
+  const playlistData = await fetcher(playlistUrl, { headers });
+  const playlist = parse(playlistData);
+
+  if (playlist.isMasterPlaylist) {
+    for (const variant of (playlist as MasterPlaylist).variants) {
+      const variantPlaylistData = await fetcher(variant.uri, { headers });
+      const variantPlaylist = parse(variantPlaylistData);
+      variant.uri = `data:application/vnd.apple.mpegurl;base64,${btoa(stringify(variantPlaylist))}`;
+    }
+  }
+
+  return `data:application/vnd.apple.mpegurl;base64,${btoa(stringify(playlist))}`;
+}