Allow disabling subtitles

lazy_player/__init__.py

@@ -72,12 +72,12 @@ class MainWindow(Gtk.ApplicationWindow):
         overlay_box.set_name("black-overlay")
         overlay_box.set_vexpand(True)
         overlay_box.set_hexpand(True)
-        
+
         # Create an overlay container
         overlay = Gtk.Overlay()
         overlay.set_child(self.video_widget)
         overlay.add_overlay(self.overlay_label)
-        
+
         overlay_box.append(overlay)
 
         # Setup GStreamer pipeline
@@ -234,7 +234,7 @@ class MainWindow(Gtk.ApplicationWindow):
         elif keyval == Gdk.keyval_from_name("Down"):
             self._seek_relative(-60)
             return True
-            
+
         elif keyval == Gdk.keyval_from_name("j"):
             self._cycle_subtitles()
             return True
@@ -276,13 +276,28 @@ class MainWindow(Gtk.ApplicationWindow):
             Gst.Format.TIME, Gst.SeekFlags.FLUSH | Gst.SeekFlags.KEY_UNIT, new_pos
         )
 
+    def _get_subtitle_info(self, track_index: int) -> str:
+        """Get subtitle track info including language if available"""
+        playbin = self.pipeline.get_by_name("playbin")
+        if not playbin:
+            return str(track_index)
+
+        # Query the subtitle track's tags
+        caps: Gst.TagList | None = playbin.emit("get-text-tags", track_index)
+        if not caps:
+            return str(track_index)
+
+        found, lang = caps.get_string("language-code")
+        return f"{track_index} ({lang})" if found else str(track_index)
+
     def _cycle_subtitles(self) -> None:
-        """Cycle through available subtitle tracks"""
+        """Cycle through available subtitle tracks, including off state"""
         playbin = self.pipeline.get_by_name("playbin")
         if not playbin:
             return
 
-        # Get current subtitle track
+        # Get current flags and subtitle track
+        flags = playbin.get_property("flags")
         current = playbin.get_property("current-text")
         n_text = playbin.get_property("n-text")
 
@@ -290,12 +305,27 @@ class MainWindow(Gtk.ApplicationWindow):
             self.show_overlay_text("No subtitles available")
             return
 
-        # Cycle to next track, wrapping around
-        next_track = (current + 1) % n_text
+        # If subtitles are disabled, enable them and set to first track
+        if not (flags & 0x00000004):  # TEXT flag
+            flags |= 0x00000004
+            playbin.set_property("flags", flags)
+            playbin.set_property("current-text", 0)
+            track_info = self._get_subtitle_info(0)
+            self.show_overlay_text(f"Subtitle track: {track_info}")
+            return
+
+        # If we're on the last track, disable subtitles
+        if current >= n_text - 1:
+            flags &= ~0x00000004  # TEXT flag
+            playbin.set_property("flags", flags)
+            self.show_overlay_text("Subtitles: Off")
+            return
+
+        # Otherwise cycle to next track
+        next_track = current + 1
         playbin.set_property("current-text", next_track)
-        
-        # Show the new track number
-        self.show_overlay_text(f"Subtitle track: {next_track}")
+        track_info = self._get_subtitle_info(next_track)
+        self.show_overlay_text(f"Subtitle track: {track_info}")
 
     def show_overlay_text(self, text: str, timeout_seconds: float = 1.0) -> None:
         """Show text in a centered overlay that disappears after timeout"""