CoreVideo iOS xcode26.0 rc

#CoreVideo.framework https://github.com/dotnet/macios/pull/23779

diff -ruN /Applications/Xcode_26.0.0-beta7.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVImageBuffer.h /Applications/Xcode_26.0.0-rc.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVImageBuffer.h
--- /Applications/Xcode_26.0.0-beta7.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVImageBuffer.h	2025-08-04 04:27:04
+++ /Applications/Xcode_26.0.0-rc.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreVideo.framework/Headers/CVImageBuffer.h	2025-08-03 00:20:39
@@ -248,9 +248,21 @@
 	Indicates that the transfer function or gamma of the content is a log format and identifies the specific log curve.
   @discussion
 	The value is a CFString holding fully specified reverse DNS identifier.
-	Content captured in Apple Log will have this key set to kCVImageBufferLogTransferFunction_AppleLog.
+	Log is a specific video format usually processed in a camera's ISP. A Log video format usually defines:
+		 Scene-referred color primaries designed to preserve the chromaticity range captured by a camera sensor. In cinematography, "scene-referred" color primaries refers to a color space designed to accurately preserve the chromaticity and dynamic range directly captured by a camera sensor.
+		 A specific gamma curve (or transfer characteristic) tailored to capturing the full dynamic range from the sensor. This gamma curve is usually shaped like a log curve (hence the name Log).
+		 A set of matrix transforms to go from RGB to Y'CbCr (Y'CbCr being the most common format used to store the bits compressed into a file).
+		 As described above, a Log video format defines a whole color space (even though the “log” part of the name comes only from the “transfer characteristic” or gamma curve)
+		 Content captured in Apple Log will have this key set to kCVImageBufferLogTransferFunction_AppleLog or kCVImageBufferLogTransferFunction_AppleLog2.
   @constant    kCVImageBufferLogTransferFunction_AppleLog
 	Indicates the Apple Log identifier.
+  @constant    kCVImageBufferLogTransferFunction_AppleLog2
+	Indicates the Apple Log 2 identifier.
+	To use Apple Log 2, set other color attachments as follows:
+		kCVImageBufferColorPrimariesKey = undefined or absent
+		kCVImageBufferTransferFunctionKey = undefined or absent
+		kCVImageBufferYCbCrMatrixKey = kCVImageBufferYCbCrMatrix_ITU_R_2020
+	https://developer.apple.com/download/all/?q=Apple%20log%20profile
   @discussion
 	You can download the Apple Log Profile White Paper from the Apple Developer Downloads website.
 */
@@ -258,6 +270,7 @@
 
 CV_EXPORT const CFStringRef CV_NONNULL kCVImageBufferLogTransferFunction_AppleLog API_AVAILABLE(macosx(14.2), ios(17.2), tvos(17.2), watchos(10.2), visionos(1.1));
 
+CV_EXPORT const CFStringRef CV_NONNULL kCVImageBufferLogTransferFunction_AppleLog2 API_AVAILABLE(macosx(26.0), ios(26.0), tvos(26.0), watchos(26.0), visionos(26.0));
 
 /*!
     @constant    kCVImageBufferDisplayMaskRectangleKey