Added audio player logic and tests.

Harmonia.Core/Engine/MediaPlayer.cs

@@ -0,0 +1,34 @@
+using ManagedBass.Flac;
+using ManagedBass;
+
+namespace Harmonia.Core.Engine;
+
+public class MediaPlayer : BaseMediaPlayer
+{
+    protected override int OnLoad(string FileName)
+    {
+        string extension = Path.GetExtension(FileName).ToLower();
+
+        switch (extension)
+        {
+            case ".flac":
+                return BassFlac.CreateStream(FileName);
+            //case ".opus":
+            //    return BassOpus.CreateStream(FileName);
+            //case ".wma":
+            //    return BassWma.CreateStream(FileName);
+            //case ".mid":
+            //    return BassMidi.CreateStream(FileName);
+            default:
+                return base.OnLoad(FileName);
+        }
+    }
+
+    protected override void InitProperties()
+    {
+        base.InitProperties();
+
+        ChannelInfo channelInfo = Bass.ChannelGetInfo(Handle);
+        Frequency = channelInfo.Frequency;
+    }
+}