Fix. Do not get displays on server start.

Signed-off-by: fufesou <shuanglongchen@yeah.net>

src/server.rs

@@ -77,6 +77,7 @@ lazy_static::lazy_static! {
     // Now we use this [`CLIENT_SERVER`] to do following operations:
     // - record local audio, and send to remote
     pub static ref CLIENT_SERVER: ServerPtr = new();
+    static ref PRIMARY_VIDEO_SERVICE_LOCK: Arc<Mutex<()>> = Default::default();
 }
 
 pub struct Server {
@@ -97,9 +98,6 @@ pub fn new() -> ServerPtr {
     server.add_service(Box::new(audio_service::new()));
     #[cfg(not(target_os = "ios"))]
     server.add_service(Box::new(display_service::new()));
-    server.add_service(Box::new(video_service::new(
-        *display_service::PRIMARY_DISPLAY_IDX,
-    )));
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
     {
         server.add_service(Box::new(clipboard_service::new()));
@@ -262,6 +260,17 @@ impl Server {
         name.starts_with(video_service::NAME)
     }
 
+    pub fn try_add_privay_video_service(&mut self) {
+        let _lock = PRIMARY_VIDEO_SERVICE_LOCK.lock().unwrap();
+        let primary_video_service_name =
+            video_service::get_service_name(*display_service::PRIMARY_DISPLAY_IDX);
+        if !self.contains(&primary_video_service_name) {
+            self.add_service(Box::new(video_service::new(
+                *display_service::PRIMARY_DISPLAY_IDX,
+            )));
+        }
+    }
+
     pub fn add_connection(&mut self, conn: ConnInner, noperms: &Vec<&'static str>) {
         let primary_video_service_name =
             video_service::get_service_name(*display_service::PRIMARY_DISPLAY_IDX);

src/server/connection.rs

@@ -1244,6 +1244,7 @@ impl Connection {
                 #[cfg(not(any(target_os = "android", target_os = "ios")))]
                 let _h = try_start_record_cursor_pos();
                 self.auto_disconnect_timer = Self::get_auto_disconenct_timer();
+                s.try_add_privay_video_service();
                 s.add_connection(self.inner.clone(), &noperms);
             }
         }

src/server/display_service.rs

@@ -24,7 +24,7 @@ lazy_static::lazy_static! {
     static ref IS_CAPTURER_MAGNIFIER_SUPPORTED: bool = is_capturer_mag_supported();
     static ref CHANGED_RESOLUTIONS: Arc<RwLock<HashMap<String, ChangedResolution>>> = Default::default();
     // Initial primary display index.
-    // It should only be updated when the rustdesk server is started, and should not be updated when displays changed.
+    // It should should not be updated when displays changed.
     pub static ref PRIMARY_DISPLAY_IDX: usize = get_primary();
     static ref SYNC_DISPLAYS: Arc<Mutex<SyncDisplaysInfo>> = Default::default();
 }