Add HLS support to multi-audio

youtube/hls_cache.py

@@ -0,0 +1,23 @@
+"""Multi-audio track support via HLS streaming.
+
+Instead of downloading all segments, we proxy the HLS playlist and
+let the browser stream the audio directly. Zero local storage needed.
+"""
+
+_tracks = {}  # cache_key -> {'hls_url': str, ...}
+
+
+def register_track(cache_key, hls_playlist_url, content_length=0,
+                   video_id=None, track_id=None):
+    print(f'[audio-track-cache] Registering track: {cache_key} -> {hls_playlist_url[:80]}...')
+    _tracks[cache_key] = {'hls_url': hls_playlist_url}
+    print(f'[audio-track-cache] Available tracks: {list(_tracks.keys())}')
+
+
+def get_hls_url(cache_key):
+    entry = _tracks.get(cache_key)
+    if entry:
+        print(f'[audio-track-cache] Found track: {cache_key}')
+    else:
+        print(f'[audio-track-cache] Track not found: {cache_key}')
+    return entry['hls_url'] if entry else None