Added GetSupportedLanguages method

Whisper.net/WhisperFactory.cs

@@ -68,6 +68,28 @@ private WhisperFactory(IWhisperProcessorModelLoader loader, bool delayInit)
         return systemInfoStr;
     }
 
+    /// <summary>
+    /// Returns an enumerable of the supported languages.
+    /// </summary>
+    /// <returns></returns>
+    public IEnumerable<string> GetSupportedLanguages()
+    {
+        if (!libraryLoaded.Value.IsSuccess)
+        {
+            throw new Exception($"Failed to load native whisper library. Error: {libraryLoaded.Value.ErrorMessage}");
+        }
+
+        for (var i = 0; i < libraryLoaded.Value.NativeWhisper!.Whisper_Lang_Max_Id(); i++)
+        {
+            var languagePtr = libraryLoaded.Value.NativeWhisper!.Whisper_Lang_Str(i);
+            var language = Marshal.PtrToStringAnsi(languagePtr);
+            if (!string.IsNullOrEmpty(language))
+            {
+                yield return language;
+            }
+        }
+    }
+
     /// <summary>
     /// Creates a factory that uses the ggml model from a path in order to create <seealso cref="WhisperProcessorBuilder"/>.
     /// </summary>

tests/Whisper.net.Tests/FactoryTests.cs

@@ -15,6 +15,14 @@ public FactoryTests(TinyModelFixture model)
         this.model = model;
     }
 
+    [Fact]
+    public void GetSupportedLanguages_ShouldReturnAll()
+    {
+        var languages = WhisperFactory.FromPath(model.ModelFile).GetSupportedLanguages().ToList();
+
+        languages.Should().HaveCount(99);
+    }
+
     [Fact]
     public void CreateBuilder_WithNoModel_ShouldThrow()
     {