Metal support for MacOS (#64)

* Add support for metal builds

* Update build_cpp.yml

* Update build_cpp.yml

* Add libs and other stuff

.github/workflows/build_cpp.yml

@@ -175,6 +175,38 @@ jobs:
  name: macos
  path: ${{ github.workspace }}/whisper-cpp/build/libwhisper.dylib
  if-no-files-found: error
+
+ build-macos-metal:
+ name: Build for MacOS Metal (ARM, x86_64)
+ runs-on: macOS-latest
+ steps:
+ - name: Clone whisper.unity
+ uses: actions/checkout@v3
+ with:
+ path: whisper-unity
+
+ - name: Clone whisper.cpp
+ uses: actions/checkout@v3
+ with:
+ repository: ${{ github.event.inputs.whisper_cpp_repo }}
+ ref: ${{ github.event.inputs.whisper_cpp_repo_ref }}
+ path: whisper-cpp
+
+ - name: Run build script
+ run: |
+ cd whisper-unity
+ sh build_cpp.sh ../whisper-cpp/ mac_metal
+ cd ${{ github.workspace }}/whisper-cpp/build/
+ mv libwhisper.dylib libwhisper_metal.dylib
+ 
+ - name: Upload results
+ uses: actions/upload-artifact@v3
+ with:
+ name: macos-metal
+ path: |
+ ${{ github.workspace }}/whisper-cpp/build/libwhisper_metal.dylib
+ ${{ github.workspace }}/whisper-cpp/build/bin/ggml-metal.metal 
+ if-no-files-found: error
 
  build-ios:
  name: Build for iOS

Packages/com.whisper.unity/Editor/WhisperPostBuild.cs

@@ -0,0 +1,40 @@
+using System;
+using System.IO;
+using JetBrains.Annotations;
+using UnityEditor;
+using UnityEditor.Callbacks;
+using UnityEngine;
+
+
+[UsedImplicitly]
+public static class WhisperPostBuild
+{
+
+ [PostProcessBuild]
+ public static void OnPostProcessBuild(BuildTarget buildTarget, string path)
+ {
+ if (buildTarget != BuildTarget.StandaloneOSX)
+ return;
+ if (!WhisperProjectSettingsProvider.MetalEnabled)
+ return;
+
+ // get source file
+ var metalFile = Path.GetFullPath("Packages/com.whisper.unity/Plugins/MacOS/ggml-metal.metal");
+ if (!File.Exists(metalFile))
+ {
+ throw new Exception("Can't find metal file in project files! " +
+ $"{metalFile} doesnt exist!");
+ }
+
+ // get target folder
+ var pluginsPath = Path.Combine(path, "Contents", "PlugIns");
+ if (!Directory.Exists(pluginsPath))
+ {
+ throw new Exception("Can't find plugins directory in build app! " +
+ $"{pluginsPath} doesnt exist!");
+ }
+
+ var targetPath = Path.Combine(pluginsPath, "ggml-metal.metal");
+ File.Copy(metalFile, targetPath, true);
+ }
+}

Packages/com.whisper.unity/Editor/WhisperProjectSettings.cs

@@ -17,9 +17,10 @@ public static SettingsProvider CreateMyCustomSettingsProvider()
  guiHandler = (searchContext) =>
  {
  CudaEnabled = EditorGUILayout.Toggle("Enable CUDA", CudaEnabled);
+ MetalEnabled = EditorGUILayout.Toggle("Enable Metal", MetalEnabled);
  },
 
- keywords = new HashSet<string>(new[] { "CUDA", "cuBLAS" })
+ keywords = new HashSet<string>(new[] { "CUDA", "cuBLAS", "Metal" })
  };
 
  return provider;
@@ -39,28 +40,51 @@ public static bool CudaEnabled
  {
  if (value == CudaEnabled)
  return;
+ SetDefine("WHISPER_CUDA", value);
+ }
+ }
+
+ public static bool MetalEnabled
+ {
+ get
+ {
+#if WHISPER_METAL
+ return true;
+#else
+ return false;
+#endif
+ }
+ set
+ {
+ if (value == MetalEnabled)
+ return;
+ SetDefine("WHISPER_METAL", value);
+ }
+ }
 
- string[] newDefines;
- var defines = GetStandaloneDefines();
-
- if (value)
- {
- if (defines.Contains("WHISPER_CUDA"))
- return;
+ private static void SetDefine(string define, bool value)
+ {
+ string[] newDefines;
+ var defines = GetStandaloneDefines();
 
- newDefines = defines.Append("WHISPER_CUDA").ToArray();
- }
- else
- {
- if (!defines.Contains("WHISPER_CUDA"))
- return;
+ if (value)
+ {
+ if (defines.Contains(define))
+ return;
 
- newDefines = defines.Where(x => x != "WHISPER_CUDA").ToArray();
- }
+ newDefines = defines.Append(define).ToArray();
+ }
+ else
+ {
+ if (!defines.Contains(define))
+ return;
 
- SetStandaloneDefines(newDefines);
+ newDefines = defines.Where(x => x != define).ToArray();
  }
+
+ SetStandaloneDefines(newDefines);
  }
+
 
  // This is for older Unity compability
  private static string[] GetStandaloneDefines()