From baf59abb6ecbf47b4fec89f247fb555ec5204b36 Mon Sep 17 00:00:00 2001
From: the_fiddler <the_fiddler@ebc5dd9b-fb1d-0410-b6f8-d24c324e9604>
Date: Tue, 22 Jan 2008 21:18:47 +0000
Subject: [PATCH] Disabled multiple AudioContext under linux. Moved
 AudioContext.LoadAvailableDevices() call outside the static constructor.

---
 Source/Examples/OpenAL/TestAudioContext.cs | 12 ++++++------
 Source/OpenTK/OpenAL/AudioContext.cs       | 22 +++++++++++++++-------
 2 files changed, 21 insertions(+), 13 deletions(-)

diff --git a/Source/Examples/OpenAL/TestAudioContext.cs b/Source/Examples/OpenAL/TestAudioContext.cs
index ffadc8c7..cf3ba4f9 100644
--- a/Source/Examples/OpenAL/TestAudioContext.cs
+++ b/Source/Examples/OpenAL/TestAudioContext.cs
@@ -52,13 +52,13 @@ namespace Examples
             context.MakeCurrent();
             Trace.Assert(context.IsCurrent);
 
-            Trace.WriteLine("IsCurrent = false...");
-            context.IsCurrent = false;
-            Trace.Assert(!context.IsCurrent);
+            //Trace.WriteLine("IsCurrent = false...");
+            //context.IsCurrent = false;
+            //Trace.Assert(!context.IsCurrent);
 
-            Trace.WriteLine("IsCurrent = true...");
-            context.IsCurrent = true;
-            Trace.Assert(context.IsCurrent);
+            //Trace.WriteLine("IsCurrent = true...");
+            //context.IsCurrent = true;
+            //Trace.Assert(context.IsCurrent);
 
             Trace.WriteLine("AudioContext.CurrentContext...");
             Trace.Assert(AudioContext.CurrentContext == context);
diff --git a/Source/OpenTK/OpenAL/AudioContext.cs b/Source/OpenTK/OpenAL/AudioContext.cs
index c3bfc93d..8448eb89 100644
--- a/Source/OpenTK/OpenAL/AudioContext.cs
+++ b/Source/OpenTK/OpenAL/AudioContext.cs
@@ -41,10 +41,10 @@ namespace OpenTK.Audio
         /// <summary>
         /// Runs before the actual class constructor, to load available devices.
         /// </summary>
-        static AudioContext()
-        {
-            LoadAvailableDevices();
-        }
+        //static AudioContext()
+        //{
+        //    LoadAvailableDevices();
+        //}
 
         #endregion
 
@@ -208,6 +208,13 @@ namespace OpenTK.Audio
             if (maxEfxSends < 0) throw new ArgumentOutOfRangeException("maxEfxSends", maxEfxSends, "Should be greater than zero.");
             //if (available_devices.Count == 0) throw new NotSupportedException("No audio hardware is available.");
 
+            if (available_devices.Count == 0)
+                LoadAvailableDevices();
+
+            // HACK: Do not allow multiple contexts under linux (crashes under Ubuntu 7.04 and 7.10)
+            if (available_contexts.Count > 0)
+                throw new NotSupportedException("Multiple AudioContexts are not supported under Linux.");
+
             device_handle = Alc.OpenDevice(device);
             if (device_handle == IntPtr.Zero)
                 throw new AudioDeviceException("The specified audio device does not exist or is tied up by another application.");
@@ -215,7 +222,7 @@ namespace OpenTK.Audio
             CheckForAlcErrors();
 
             device_name = device;
-            /*
+
             // Build the attribute list
             List<int> attributes = new List<int>();
             
@@ -243,8 +250,7 @@ namespace OpenTK.Audio
             }
 
             context_handle = Alc.CreateContext(device_handle, attributes.ToArray());
-            */
-            context_handle = Alc.CreateContext(device_handle, (int[])null);
+
             if (context_handle == IntPtr.Zero)
             {
                 Alc.CloseDevice(device_handle);
@@ -318,6 +324,8 @@ namespace OpenTK.Audio
         {
             get
             {
+                if (available_devices.Count == 0)
+                    LoadAvailableDevices();
                 return available_devices.ToArray();
             }
         }