streaming edits

lib/subsonic/subsonic_client.dart

@@ -302,11 +302,25 @@ class SubsonicClient {
   /// manager, which fetches these bytes to disk). `maxBitRate == 0` means
   /// original / no transcode; [format] requests a specific transcode container
   /// (e.g. `mp3`, `opus`), or null for the server default / original.
-  Uri streamUri(String id, {int maxBitRate = 0, String? format}) =>
+  ///
+  /// [estimateContentLength] asks the server to send an (estimated)
+  /// `Content-Length` header even for on-the-fly transcodes. Transcoded
+  /// responses are otherwise chunked with no length and no byte ranges, so the
+  /// native player reports `duration == null`, never reaches `ready`, and the
+  /// playhead freezes at 0:00 (then restarts). Only meaningful when transcoding
+  /// (`maxBitRate > 0` or a [format]); original streams already carry a real
+  /// length.
+  Uri streamUri(
+    String id, {
+    int maxBitRate = 0,
+    String? format,
+    bool estimateContentLength = false,
+  }) =>
       _uri('stream', {
         'id': id,
         if (maxBitRate > 0) 'maxBitRate': '$maxBitRate',
         if (format != null && format.isNotEmpty) 'format': format,
+        if (estimateContentLength) 'estimateContentLength': 'true',
       });
 
   /// Signed cover-art URL. [size] is clamped to Subsonic's 32–2048 range.