From 3af553e34f4cbdaafdf6bab0e0e08666d3406beb Mon Sep 17 00:00:00 2001
From: hogliux <fabian.renn@gmail.com>
Date: Mon, 14 Sep 2015 13:00:53 +0100
Subject: [PATCH] Do not report AU layout if the AudioUnit is only mono or
 stereo

---
 .../AU/juce_AU_Wrapper.mm                     | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm b/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm
index d5dddea694..f23523fda6 100644
--- a/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm
+++ b/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm
@@ -509,6 +509,10 @@ public:
                                   AudioChannelLayout *outLayoutPtr,
                                   Boolean &outWritable)
     {
+        // fallback to old code if this plug-in does not have multi channel IO
+        if (! hasMultiChannelConfiguration())
+            return 0;
+
         if (element == 0 && (scope == kAudioUnitScope_Output || scope == kAudioUnitScope_Input))
         {
             outWritable = false;
@@ -1404,6 +1408,21 @@ private:
         SetAFactoryPresetAsCurrent (currentPreset);
     }
 
+    //==============================================================================
+    bool hasMultiChannelConfiguration () noexcept
+    {
+        for (int i = 0; i < numChannelConfigs; ++i)
+        {
+           #if !JucePlugin_IsSynth
+            if (channelConfigs[i][0] > 2)
+                return true;
+           #endif
+            if (channelConfigs[i][1] > 2)
+                return true;
+        }
+        return false;
+    }
+
     JUCE_DECLARE_NON_COPYABLE (JuceAU)
 };