Check IsDisposed before setting flags in SampleChannelBass

Author: hwsmm

osu.Framework/Audio/Sample/SampleChannelBass.cs

@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <[email protected]>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using ManagedBass;
 using osu.Framework.Audio.Mixing.Bass;
 using osu.Framework.Audio.Track;
@@ -130,8 +131,10 @@ protected override void UpdateState()
 
         public override void Play()
         {
-            userRequestedPlay = true;
+            // Check if this channel is disposed first to not set enqueuedPlaybackStart to true, which also sets Playing to true.
+            ObjectDisposedException.ThrowIf(IsDisposed, this);
 
+            userRequestedPlay = true;
             userRequestedStop = false;
 
             // Pin Playing and IsAlive to true so that the channel isn't killed by the next update. This is only reset after playback is started.
@@ -152,7 +155,6 @@ public override void Play()
         public override void Stop()
         {
             userRequestedPlay = false;
-
             userRequestedStop = true;
 
             base.Stop();