libvlc: player: watch: prevent normal update while seeking

The behavior is different from the CORE, but I don't see any use case for
receiving points prior to the seek request while seeking. It is possible
from the core, but no UI is doing it for now.

include/vlc/libvlc_media_player.h

@@ -2974,6 +2974,8 @@ typedef void (*libvlc_media_player_watch_time_on_paused)(
  *
  * \warning It is forbidden to call any Media Player functions from here.
  *
+ * \note It is not possible to receive points via on_update() while seeking.
+ *
  * \param value point of the seek request or NULL when seeking is finished
  * \param data opaque pointer set by libvlc_media_player_watch_time()
  */

lib/media_player.c

@@ -2262,6 +2262,9 @@ static void player_timer_on_update(const struct vlc_player_timer_point *point,
 {
     libvlc_media_player_t *p_mi = data;
 
+    if (p_mi->timer.seeking)
+        return;
+
     const libvlc_media_player_time_point_t libpoint = PLAYER_TIME_CORE_TO_LIB(point);
 
     p_mi->timer.on_update(&libpoint, p_mi->timer.cbs_data);
@@ -2289,9 +2292,13 @@ static void player_timer_on_seek(const struct vlc_player_timer_point *point,
     {
         const libvlc_media_player_time_point_t libpoint = PLAYER_TIME_CORE_TO_LIB(point);
         p_mi->timer.on_seek(&libpoint, p_mi->timer.cbs_data);
+        p_mi->timer.seeking = true;
     }
     else
+    {
         p_mi->timer.on_seek(NULL, p_mi->timer.cbs_data);
+        p_mi->timer.seeking = false;
+    }
 }
 
 int
@@ -2325,6 +2332,7 @@ libvlc_media_player_watch_time(libvlc_media_player_t *p_mi,
     p_mi->timer.on_paused = on_paused;
     p_mi->timer.on_seek = on_seek;
     p_mi->timer.cbs_data = cbs_data;
+    p_mi->timer.seeking = false;
 
     p_mi->timer.id = vlc_player_AddTimer(player, VLC_TICK_FROM_US(min_period_us),
                                          &player_timer_cbs, p_mi);

lib/media_player_internal.h

@@ -53,6 +53,7 @@ struct libvlc_media_player_t
         libvlc_media_player_watch_time_on_paused on_paused;
         libvlc_media_player_watch_time_on_seek on_seek;
         void *cbs_data;
+        bool seeking;
     } timer;
 };