send dummy event to prevent stuttering

VoidLink/ViewControllers/StreamFrameViewController.m

@@ -82,6 +82,8 @@
     dispatch_block_t _delayedRemoveExtScreen;
     VideoDecoderRenderer *_videoRenderer;
     BOOL _isRestoringFromPiP;
+    CADisplayLink *_displayLink;
+
 #if !TARGET_OS_TV
     CustomEdgeSlideGestureRecognizer *_slideToSettingsRecognizer;
     CustomEdgeSlideGestureRecognizer *_slideToCmdToolRecognizer;
@@ -89,6 +91,7 @@
     LayoutOnScreenControlsViewController *_layoutOnScreenControlsVC;
     ToolboxViewController* toolBoxViewController;
     MicHandler* micHandler;
+
 #else
     UITapGestureRecognizer *_menuTapGestureRecognizer;
     UITapGestureRecognizer *_menuDoubleTapGestureRecognizer;
@@ -425,11 +428,24 @@
     if (self.imguiView && self.imguiView.mtkView.superview) {
         [self.view bringSubviewToFront:self.imguiView.mtkView];
     }
-
+    
+    if(_settings.sendDummyEvent){
+        [self setupDisplayLink];
+        [self startDisplayLink];
+    }
     NSLog(@"frameview gestures: %d", (uint32_t)[self.view.gestureRecognizers count]);
     NSLog(@"streamview gestures: %d", (uint32_t)[_streamView.gestureRecognizers count]);
 }
 
+- (void)viewWillAppear:(BOOL)animated {
+    if(_settings.sendDummyEvent) [self startDisplayLink];
+}
+
+- (void)viewWillDisappear:(BOOL)animated {
+    [super viewWillDisappear:animated];
+    [self stopDisplayLink];
+}
+
 - (void)viewDidAppear:(BOOL)animated
 {
     [super viewDidAppear:animated];
@@ -1123,6 +1139,7 @@
 
 - (void)expandSettingsView{
     self.mainFrameViewcontroller.settingsExpandedInStreamView = true; //notify mainFrameViewContorller that this is a setting expansion in stream view, some settings shall be disabled.
+    [self stopDisplayLink];
     [self.mainFrameViewcontroller expandSettingsView];
 }
 
@@ -1592,4 +1609,30 @@
     dispatch_after(delayTime, dispatch_get_main_queue(), block);
 }
 
+- (void)dealloc {
+    [self stopDisplayLink];
+}
+
+- (void)setupDisplayLink {
+    if (_displayLink != nil) return;
+    _displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(displayLinkTick:)];
+    [_displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
+}
+
+- (void)startDisplayLink {
+    _displayLink.paused = NO;
+}
+
+- (void)stopDisplayLink {
+    [_displayLink invalidate];
+    _displayLink = nil;
+}
+
+- (void)displayLinkTick:(CADisplayLink *)link {
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+        LiSendKeyboardEvent(0xFF, KEY_ACTION_UP, 0);
+    });
+}
+
+
 @end