[CoreMediaIO] Add complete C# bindings for CoreMediaIO framework up to Xcode 26.4

[dalexsoto]

Add bindings for the CoreMediaIO framework on macOS and Mac Catalyst:

• 12 ObjC classes (CMIOExtensionClient, Device, Provider, Stream, etc.)
• 3 protocols (CMIOExtensionStreamSource, DeviceSource, ProviderSource)
• 3 enums (StreamDirection, StreamClockType, StreamDiscontinuityFlags)
• ~52 NSString property fields (CMIOExtensionProperty* constants)
• ~30 C P/Invoke declarations (CMIOObject*, CMIODevice*, CMIOStream*, CMIOSampleBuffer* hardware and sample buffer functions)
• Async support for ConsumeSampleBuffer completion handler

Resolves all 423 .todo entries (211 macOS + 212 MacCatalyst).

[vs-mobiletools-engineering-service2]

✅ [CI Build #1c52068] Build passed (Build packages) ✅

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Hash: 1c52068ed8d0086a5ba6a6d26155a8aef1ac6441 [PR build]

[vs-mobiletools-engineering-service2]

✅ [PR Build #1c52068] Build passed (Detect API changes) ✅

Pipeline on Agent
Hash: 1c52068ed8d0086a5ba6a6d26155a8aef1ac6441 [PR build]

[vs-mobiletools-engineering-service2]

✅ API diff for current PR / commit

NET (empty diffs)

• iOS: vsdrops gist ( No breaking changes )
• tvOS: vsdrops gist ( No breaking changes )
• MacCatalyst: vsdrops gist ( No breaking changes )
• macOS: vsdrops gist ( No breaking changes )

✅ API diff vs stable

NET (empty diffs)

• iOS: vsdrops gist ( No breaking changes )
• tvOS: vsdrops gist ( No breaking changes )
• MacCatalyst: vsdrops gist ( No breaking changes )
• macOS: vsdrops gist ( No breaking changes )

ℹ️ Generator diff

Generator Diff: vsdrops (html) vsdrops (raw diff) gist (raw diff) - Please review changes)

Pipeline on Agent
Hash: 1c52068ed8d0086a5ba6a6d26155a8aef1ac6441 [PR build]

[vs-mobiletools-engineering-service2]

✅ [CI Build #1c52068] Build passed (Build macOS tests) ✅

Pipeline on Agent
Hash: 1c52068ed8d0086a5ba6a6d26155a8aef1ac6441 [PR build]

[vs-mobiletools-engineering-service2]

🔥 [CI Build #1c52068] Test results 🔥

Test results

❌ Tests failed on VSTS: test results

0 tests crashed, 6 tests failed, 150 tests passed.

Failures

❌ cecil tests

1 tests failed, 0 tests passed.

Failed tests

• Cecil-based tests: Failed (Execution failed with exit code 1)
  • Cecil.Tests.Documentation.VerifyEveryVisibleMemberIsDocumented: Found 1 undocumented APIs (not known failures) and 0 APIs that were marked as known failures but are now documented. If this is ...

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❌ dotnettests tests (MacCatalyst)

1 tests failed, 0 tests passed.

Failed tests

• DotNet tests: Failed (Execution failed with exit code 1)
  • Xamarin.Tests.DotNetProjectTest.LinkedWithNativeLibraries(MacCat...: Frameworks
    Expected: equivalent to < "/System/iOSSupport/System/Library/Frameworks/AddressBook.framework/Versions/A/AddressB...

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❌ dotnettests tests (macOS)

1 tests failed, 0 tests passed.

Failed tests

• DotNet tests: Failed (Execution failed with exit code 1)
  • Xamarin.Tests.DotNetProjectTest.LinkedWithNativeLibraries(MacOSX...: Frameworks
    Expected: equivalent to < "@executable_path/../../Contents/MonoBundle/libclrgc.dylib", "@executable_path/../../Co...

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❌ linker tests

1 tests failed, 43 tests passed.

Failed tests

• dont link/macOS/Debug: BuildFailure

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❌ Tests on macOS Monterey (12) tests

1 tests failed, 4 tests passed.

Failed tests

• introspection: Failed (exit code 2)
  • FieldExists : 1 errors found in 7034 fields validated: kCMIOSampleBufferAttachmentKey_PixelBufferOverlaidByStaticImage
  • Could not find the field 'kCMIOSampleBufferAttachmentKey_PixelBufferOverlaidByStaticImage' in /System/Library/Frameworks/CoreMediaIO.framework/CoreMediaIO
  • NonNullNSStringFields : 1 errors found in 5226 fields validated: CoreMediaIO.CMIOSampleBufferAttachmentKeys.PixelBufferOverlaidByStaticImage
  • ... and 13 more failures

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❌ Tests on macOS Ventura (13) tests

1 tests failed, 4 tests passed.

Failed tests

• introspection: Failed (exit code 2)
  • FieldExists : 1 errors found in 7497 fields validated: kCMIOSampleBufferAttachmentKey_PixelBufferOverlaidByStaticImage
  • Could not find the field 'kCMIOSampleBufferAttachmentKey_PixelBufferOverlaidByStaticImage' in /System/Library/Frameworks/CoreMediaIO.framework/CoreMediaIO
  • NonNullNSStringFields : 1 errors found in 5447 fields validated: CoreMediaIO.CMIOSampleBufferAttachmentKeys.PixelBufferOverlaidByStaticImage
  • ... and 13 more failures

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Successes

✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. Html Report (VSDrops) Download
✅ introspection: All 6 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 11 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 15 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 12 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 11 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ sharpie: All 1 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

macOS tests

✅ Tests on macOS Sonoma (14): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sequoia (15): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Tahoe (26): All 5 tests passed. Html Report (VSDrops) Download

Linux Build Verification

✅ Linux build succeeded

Pipeline on Agent
Hash: 1c52068ed8d0086a5ba6a6d26155a8aef1ac6441 [PR build]