fix(automotive): keep video from starting while a car is driving

DD-3 gives video no exemption: a restricted vehicle must not play it at all. The gate is read at the single point where media actually opens, so every path that can start a picture - an explicit play, a gapless arm, a track or channel switch, a frame-rate-match resume, a reload, and the queue navigation commands of the OS media session - is covered by one check rather than by a guard at each call site. A seek can also start playback with no play call, because mpv resumes when it seeks off the end of a file, so a restricted seek is followed by a pause. Watch Together needed the pause to be local. A vehicle stopping one peer is not a room-wide intent: a guest's forced pause is swallowed by the attachment's ledger rather than published, while a host's still pauses the room, because a host that kept broadcasting a frozen anchor would stall or rewind every guest it was meant to protect. The layer that owns a pause owns the resume for it, and one acknowledgement is recorded per event, so a surplus cannot eat the user's next real pause.
2026-08-06 03:45:09 +02:00
parent 3a56218a12
commit 4607d165fd
11 changed files with 396 additions and 9 deletions
@@ -128,7 +128,18 @@ extension _VideoPlayerLifecycleMethods on VideoPlayerScreenState {
      _wasPlayingBeforeInactive = _wasPlayingBeforeInactive || wasActive;
      if (wasActive) {
        try {
-          await _pauseWithPlaybackIntent(currentPlayer);
+          // On a car this is the driving transition itself, on every head unit whose vehicle cannot
+          // report its restrictions. It is forced on this peer alone, so it must not travel to the
+          // rest of a Watch Together room; elsewhere backgrounding keeps its existing meaning.
+          if (isAutomotive) {
+            if (await _pauseWithoutDisturbingTheRoom(currentPlayer)) {
+              // The sync layer owns this pause and its resume. Drop the latch so the screen does not
+              // also restore playback on the way back and ask the room to play along with it.
+              _wasPlayingBeforeInactive = false;
+            }
+          } else {
+            await _pauseWithPlaybackIntent(currentPlayer);
+          }
          appLogger.d(
            'Video paused due to app being hidden '
            '(${isAutomotive