Fix crash in RTCMTLVideoView when trying to draw an invalid sized frame

Bug: webrtc:14892
Change-Id: I6321380444fa1de34c64fe72b587f1f5b245fad8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/304000
Commit-Queue: Kári Helgason <[email protected]>
Reviewed-by: Kári Helgason <[email protected]>
Cr-Commit-Position: refs/heads/main@{#39971}

Author: saghul

sdk/objc/components/renderer/metal/RTCMTLI420Renderer.mm

@@ -116,6 +116,13 @@ - (BOOL)setupTexturesForFrame:(nonnull RTC_OBJC_TYPE(RTCVideoFrame) *)frame {
     return NO;
   }
 
+  // Chroma size must be >= 1 as per the Apple documentation, so skip ?x1
+  // and 1x? frames.
+  // See: https://bugs.chromium.org/p/webrtc/issues/detail?id=14892
+  if (frame.width < 2 || frame.height < 2) {
+    return NO;
+  }
+
   id<RTC_OBJC_TYPE(RTCI420Buffer)> buffer = [frame.buffer toI420];
 
   // Luma (y) texture.