Revert "fix: frozen image when switching from metal to AVSB"

This reverts commit 2b052fef1e.

VoidLink/Stream/VideoDecoderRenderer.m

@@ -59,18 +59,12 @@ extern int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size,
 
 - (void)reinitializeDisplayLayer
 {
-    // Clean up existing display layer if it exists
+    if (_displayLayer == nil) {
-    if (_displayLayer != nil) {
+        _displayLayer = [[AVSampleBufferDisplayLayer alloc] init];
-        [_displayLayer flushAndRemoveImage];
+        _displayLayer.backgroundColor = [UIColor blackColor].CGColor;
-        [_displayLayer removeFromSuperlayer];
+        _displayLayer.videoGravity = AVLayerVideoGravityResize;
-        _displayLayer = nil;
+        [_view.layer addSublayer:_displayLayer];
     }
-    
-    // Create a new display layer
-    _displayLayer = [[AVSampleBufferDisplayLayer alloc] init];
-    _displayLayer.backgroundColor = [UIColor blackColor].CGColor;
-    _displayLayer.videoGravity = AVLayerVideoGravityResize;
-    [_view.layer addSublayer:_displayLayer];
 
     // Ensure the AVSampleBufferDisplayLayer is sized to preserve the aspect ratio
     // of the video stream. We used to use AVLayerVideoGravityResizeAspect, but that
@@ -369,14 +363,6 @@ int DrSubmitDecodeUnit(PDECODE_UNIT decodeUnit);
 
     if (_renderingBackend == RENDER_AVSB) {
         [_displayLink invalidate];
-        _displayLink = nil;
-        
-        // Properly clean up the display layer
-        if (_displayLayer != nil) {
-            [_displayLayer flushAndRemoveImage];
-            [_displayLayer removeFromSuperlayer];
-            _displayLayer = nil;
-        }
     }
 
     if (_decompressionSession != NULL) {
@@ -384,17 +370,6 @@ int DrSubmitDecodeUnit(PDECODE_UNIT decodeUnit);
         CFRelease(_decompressionSession);
         _decompressionSession = nil;
     }
-    
-    // Clean up format descriptors
-    if (_formatDesc != nil) {
-        CFRelease(_formatDesc);
-        _formatDesc = nil;
-    }
-    
-    if (_formatDescImageBuffer != nil) {
-        CFRelease(_formatDescImageBuffer);
-        _formatDescImageBuffer = nil;
-    }
 }
 
 #define NALU_START_PREFIX_SIZE 3