CoreVideo iOS xcode13.0 beta4

#CoreVideo.framework https://github.com/xamarin/xamarin-macios/pull/11997

diff -ruN /Applications/Xcode_13.0.0-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVBuffer.h /Applications/Xcode_13.0.0-beta4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVBuffer.h
--- /Applications/Xcode_13.0.0-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVBuffer.h	2021-07-13 00:32:41.000000000 -0400
+++ /Applications/Xcode_13.0.0-beta4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVBuffer.h	2021-07-23 13:29:48.000000000 -0400
@@ -170,6 +170,15 @@
 */
 CV_EXPORT CFTypeRef CV_NULLABLE CF_RETURNS_RETAINED CVBufferCopyAttachment( CVBufferRef CV_NONNULL buffer, CFStringRef CV_NONNULL key, CVAttachmentMode * CV_NULLABLE attachmentMode ) API_AVAILABLE(macos(12.0), ios(15.0), tvos(15.0), watchos(8.0));
 
+/*!
+    @function   CVBufferHasAttachment
+    @abstract   Returns true if an attachment with the passed key is present on a CVBuffer object.
+    @param      buffer  Target CVBuffer object.
+    @param      key    Key in form of a CFString identifying the desired attachment.
+    @result     True if an attachment with this key is present, otherwise false.
+*/
+CV_EXPORT Boolean CVBufferHasAttachment( CVBufferRef CV_NONNULL buffer, CFStringRef CV_NONNULL key ) API_AVAILABLE(macos(12.0), ios(15.0), tvos(15.0), watchos(8.0));
+
 #if defined(__cplusplus)
 }
 #endif
diff -ruN /Applications/Xcode_13.0.0-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVPixelBuffer.h /Applications/Xcode_13.0.0-beta4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVPixelBuffer.h
--- /Applications/Xcode_13.0.0-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVPixelBuffer.h	2021-07-13 00:38:51.000000000 -0400
+++ /Applications/Xcode_13.0.0-beta4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVPixelBuffer.h	2021-07-23 13:31:32.000000000 -0400
@@ -286,6 +286,13 @@
 CV_EXPORT const CFStringRef CV_NONNULL kCVPixelBufferProResRAWKey_RecommendedCrop API_AVAILABLE(ios(14.0), macosx(11.0)) __TVOS_PROHIBITED __WATCHOS_PROHIBITED;
 
 /*!
+	@const      kCVPixelBufferProResRAWKey_MetadataExtension
+	@abstract   Buffer attachment key for metadata extension.
+    @discussion Associated attachment is CFData containing ProRes RAW metadata extension. This attachment is optional for buffers with either bp16 or bp64.  The CFData contains a big-endian uint32 representing the size of the item in bytes followed by a 4-character code ('psim') followed by a variable-length pascal string identifying the metadata (like a key string) followed by the metadata payload.
+*/
+CV_EXPORT const CFStringRef CV_NONNULL kCVPixelBufferProResRAWKey_MetadataExtension API_AVAILABLE(ios(15.0), macosx(12.0)) __TVOS_PROHIBITED __WATCHOS_PROHIBITED;
+
+/*!
     @typedef	CVPixelBufferRef
     @abstract   Based on the image buffer type. The pixel buffer implements the memory storage for an image buffer.