Merge remote-tracking branch 'origin/master' into 1.6

# Conflicts:
#	Source/Editor/Scripting/CodeEditors/VisualStudioCodeEditor.cpp
#	Source/Tools/Flax.Build/Deps/Dependencies/OpenAL.cs

Source/Editor/Viewport/Previews/AudioClipPreview.cs

@@ -37,6 +37,7 @@ namespace FlaxEditor.Viewport.Previews
 
         private readonly object _locker = new object();
         private AudioClip _asset;
+        private int _pcmSequence = 0;
         private float[] _pcmData;
         private AudioDataInfo _pcmInfo;
 
@@ -79,6 +80,20 @@ namespace FlaxEditor.Viewport.Previews
             }
         }
 
+        /// <summary>
+        /// Gets the cached audio data info.
+        /// </summary>
+        public AudioDataInfo DataInfo
+        {
+            get
+            {
+                lock (_locker)
+                {
+                    return _pcmInfo;
+                }
+            }
+        }
+
         /// <summary>
         /// The draw mode.
         /// </summary>
@@ -104,6 +119,28 @@ namespace FlaxEditor.Viewport.Previews
         /// </summary>
         public static readonly float UnitsPerSecond = 100.0f;
 
+        /// <summary>
+        /// Invalidates the cached audio PCM data and fetches it again from the asset.
+        /// </summary>
+        public void RefreshPreview()
+        {
+            lock (_locker)
+            {
+                if (_asset != null)
+                {
+                    // Release any cached data
+                    _pcmData = null;
+
+                    // Invalidate any in-flight data download to reject cached data due to refresh
+                    if (_pcmSequence != 0)
+                        _pcmSequence++;
+
+                    // Use async task to gather PCM data (engine loads it from the asset)
+                    Task.Run(DownloadData);
+                }
+            }
+        }
+
         /// <inheritdoc />
         public override void Draw()
         {
@@ -220,7 +257,13 @@ namespace FlaxEditor.Viewport.Previews
         /// </summary>
         private void DownloadData()
         {
-            var asset = _asset;
+            AudioClip asset;
+            int sequence;
+            lock (_locker)
+            {
+                asset = _asset;
+                sequence = _pcmSequence;
+            }
             if (!asset)
                 return;
 
@@ -245,8 +288,9 @@ namespace FlaxEditor.Viewport.Previews
             lock (_locker)
             {
                 // If asset has been modified during data fetching, ignore it
-                if (_asset == asset)
+                if (_asset == asset && _pcmSequence == sequence)
                 {
+                    _pcmSequence++;
                     _pcmData = data;
                     _pcmInfo = dataInfo;
                 }