3 files changed, 104 insertions, 0 deletions
diff --git a/MediaBrowser.MediaEncoding/Encoder/ApplePlatformHelper.cs b/MediaBrowser.MediaEncoding/Encoder/ApplePlatformHelper.cs
new file mode 100644
index 000000000..a8ff58b09
--- /dev/null
+++ b/MediaBrowser.MediaEncoding/Encoder/ApplePlatformHelper.cs
@@ -0,0 +1,87 @@
+#pragma warning disable CA1031
+
+using System;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+using Microsoft.Extensions.Logging;
+
+namespace MediaBrowser.MediaEncoding.Encoder;
+
+/// <summary>
+/// Helper class for Apple platform specific operations.
+/// </summary>
+[SupportedOSPlatform("macos")]
+public static class ApplePlatformHelper
+{
+    private static readonly string[] _av1DecodeBlacklistedCpuClass = ["M1", "M2"];
+
+    private static string GetSysctlValue(ReadOnlySpan<byte> name)
+    {
+        IntPtr length = IntPtr.Zero;
+        // Get length of the value
+        int osStatus = SysctlByName(name, IntPtr.Zero, ref length, IntPtr.Zero, 0);
+
+        if (osStatus != 0)
+        {
+            throw new NotSupportedException($"Failed to get sysctl value for {System.Text.Encoding.UTF8.GetString(name)} with error {osStatus}");
+        }
+
+        IntPtr buffer = Marshal.AllocHGlobal(length.ToInt32());
+        try
+        {
+            osStatus = SysctlByName(name, buffer, ref length, IntPtr.Zero, 0);
+            if (osStatus != 0)
+            {
+                throw new NotSupportedException($"Failed to get sysctl value for {System.Text.Encoding.UTF8.GetString(name)} with error {osStatus}");
+            }
+
+            return Marshal.PtrToStringAnsi(buffer) ?? string.Empty;
+        }
+        finally
+        {
+            Marshal.FreeHGlobal(buffer);
+        }
+    }
+
+    private static int SysctlByName(ReadOnlySpan<byte> name, IntPtr oldp, ref IntPtr oldlenp, IntPtr newp, uint newlen)
+    {
+        return NativeMethods.SysctlByName(name.ToArray(), oldp, ref oldlenp, newp, newlen);
+    }
+
+    /// <summary>
+    /// Check if the current system has hardware acceleration for AV1 decoding.
+    /// </summary>
+    /// <param name="logger">The logger used for error logging.</param>
+    /// <returns>Boolean indicates the hwaccel support.</returns>
+    public static bool HasAv1HardwareAccel(ILogger logger)
+    {
+        if (!RuntimeInformation.OSArchitecture.Equals(Architecture.Arm64))
+        {
+            return false;
+        }
+
+        try
+        {
+            string cpuBrandString = GetSysctlValue("machdep.cpu.brand_string"u8);
+            return !_av1DecodeBlacklistedCpuClass.Any(blacklistedCpuClass => cpuBrandString.Contains(blacklistedCpuClass, StringComparison.OrdinalIgnoreCase));
+        }
+        catch (NotSupportedException e)
+        {
+            logger.LogError("Error getting CPU brand string: {Message}", e.Message);
+        }
+        catch (Exception e)
+        {
+            logger.LogError("Unknown error occured: {Exception}", e);
+        }
+
+        return false;
+    }
+
+    private static class NativeMethods
+    {
+        [DllImport("libc", EntryPoint = "sysctlbyname", SetLastError = true)]
+        [DefaultDllImportSearchPaths(DllImportSearchPath.SafeDirectories)]
+        internal static extern int SysctlByName(byte[] name, IntPtr oldp, ref IntPtr oldlenp, IntPtr newp, uint newlen);
+    }
+}
diff --git a/MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs b/MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs
index 23d9ca7ef..54d0eb4b5 100644
--- a/MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs
+++ b/MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs
@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.Globalization;
 using System.Linq;
+using System.Runtime.Versioning;
 using System.Text.RegularExpressions;
 using Microsoft.Extensions.Logging;
 
@@ -437,6 +438,12 @@ namespace MediaBrowser.MediaEncoding.Encoder
             }
         }
 
+        [SupportedOSPlatform("macos")]
+        public bool CheckIsVideoToolboxAv1DecodeAvailable()
+        {
+            return ApplePlatformHelper.HasAv1HardwareAccel(_logger);
+        }
+
         private IEnumerable<string> GetHwaccelTypes()
         {
             string? output = null;
diff --git a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
index 14cf869f9..e96040506 100644
--- a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
+++ b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
@@ -83,6 +83,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
         private bool _isVaapiDeviceSupportVulkanDrmModifier = false;
         private bool _isVaapiDeviceSupportVulkanDrmInterop = false;
 
+        private bool _isVideoToolboxAv1DecodeAvailable = false;
+
         private static string[] _vulkanImageDrmFmtModifierExts =
         {
             "VK_EXT_image_drm_format_modifier",
@@ -159,6 +161,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
         /// <inheritdoc />
         public bool IsVaapiDeviceSupportVulkanDrmInterop => _isVaapiDeviceSupportVulkanDrmInterop;
 
+        public bool IsVideoToolboxAv1DecodeAvailable => _isVideoToolboxAv1DecodeAvailable;
+
         [GeneratedRegex(@"[^\/\\]+?(\.[^\/\\\n.]+)?$")]
         private static partial Regex FfprobePathRegex();
 
@@ -261,6 +265,12 @@ namespace MediaBrowser.MediaEncoding.Encoder
                         _logger.LogInformation("VAAPI device {RenderNodePath} supports Vulkan DRM interop", options.VaapiDevice);
                     }
                 }
+
+                // Check if VideoToolbox supports AV1 decode
+                if (OperatingSystem.IsMacOS() && SupportsHwaccel("videotoolbox"))
+                {
+                    _isVideoToolboxAv1DecodeAvailable = validator.CheckIsVideoToolboxAv1DecodeAvailable();
+                }
             }
 
             _logger.LogInformation("FFmpeg: {FfmpegPath}", _ffmpegPath ?? string.Empty);