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[CoreMidi] Add missing CoreMIDI bindings and MidiEventList support. #24738

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[CoreMidi] Add missing CoreMIDI bindings and MidiEventList support. #24738

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46761f4
[CoreMidi] Add missing CoreMIDI bindings and MidiEventList support.
rolfbjarne Feb 12, 2026
5247eb1
[CoreMidi] Add MIDIEventListForEachEvent binding and MidiUniversalMes…
rolfbjarne Jun 23, 2026
01b1410
[CoreMidi] Make MidiUniversalMessage blittable (no explicit layout).
rolfbjarne Jun 23, 2026
a8f368c
[CoreMidi] Address PR review comments
rolfbjarne Jun 25, 2026
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12 changes: 10 additions & 2 deletions docs/preview-apis.md
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Expand Up @@ -104,11 +104,19 @@ method is Swift API we've bound manually, and as such it was marked as experimen

It's no longer marked as experimental.

[1]: https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.codeanalysis.experimentalattribute?view=net-8.0

## Rgen (APL0003)

Rgen is the new Roslyn codegenerator based binding tool. The tool is underdevelopment and its API is open to change until
a stable release is announced.

The diagnostic id for Rgen is APL0003.

## CoreMidi.MidiDriver (APL0004)

The [MIDIDevice](https://developer.apple.com/documentation/coremidi/midi-drivers) API is untested, and as such it's marked experimental until .NET 12.

The diagnostic id for MidiDevice is APL0004.

---

[1]: https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.codeanalysis.experimentalattribute?view=net-8.0
28 changes: 28 additions & 0 deletions src/CoreFoundation/CFUuidBytes.cs
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@@ -0,0 +1,28 @@
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.

#nullable enable

namespace CoreFoundation {

@rolfbjarne rolfbjarne Jun 25, 2026

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🤖 💡 Patterns — This new file is missing the repo's MIT license header and #nullable enable. New files should start with:

// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.

Rule: New-file conventions

// This struct is only used for P/Invokes.
struct CFUuidBytes {
#pragma warning disable CS0649 // Field '...' is never assigned to, and will always have its default value 0
public byte Byte0;
public byte Byte1;
public byte Byte2;
public byte Byte3;
public byte Byte4;
public byte Byte5;
public byte Byte6;
public byte Byte7;
public byte Byte8;
public byte Byte9;
public byte Byte10;
public byte Byte11;
public byte Byte12;
public byte Byte13;
public byte Byte14;
public byte Byte15;
#pragma warning restore CS0649
}
}
10 changes: 7 additions & 3 deletions src/CoreMidi/MidiBluetoothDriver.cs
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@@ -1,5 +1,4 @@
#if !TVOS
//

// MidiBluetoothDriver.cs
//
// Authors: TJ Lambert (TJ.Lambert@microsoft.com)
Expand All @@ -12,6 +11,7 @@
using CoreFoundation;

namespace CoreMidi {
/// <summary>Provides access to the MIDI Bluetooth driver for managing Bluetooth MIDI connections.</summary>
[SupportedOSPlatform ("ios16.0")]
[SupportedOSPlatform ("maccatalyst16.0")]
[SupportedOSPlatform ("tvos16.0")]
Expand All @@ -20,11 +20,16 @@ public partial class MidiBluetoothDriver {
[DllImport (Constants.CoreMidiLibrary)]
static extern int MIDIBluetoothDriverActivateAllConnections ();

/// <summary>Activates all Bluetooth MIDI connections.</summary>
/// <returns>A status code indicating the result of the operation (0 for success).</returns>
public static int ActivateAllConnections () => MIDIBluetoothDriverActivateAllConnections ();

[DllImport (Constants.CoreMidiLibrary)]
static extern unsafe int MIDIBluetoothDriverDisconnect (/* CFStringRef* */ NativeHandle uuid);

/// <summary>Disconnects a Bluetooth MIDI device identified by its UUID.</summary>
/// <param name="uuid">The UUID of the Bluetooth MIDI device to disconnect.</param>
/// <returns>A status code indicating the result of the operation (0 for success).</returns>
public static int Disconnect (NSString uuid)
{
int result = MIDIBluetoothDriverDisconnect (uuid.GetHandle ());
Expand All @@ -33,4 +38,3 @@ public static int Disconnect (NSString uuid)
}
}
}
#endif
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