From 23a248fe75519c4d721a986384fb2e49965530ac Mon Sep 17 00:00:00 2001
From: jules <jules@juce.com>
Date: Tue, 25 Oct 2016 16:11:33 +0100
Subject: [PATCH] Added method
 VSTPluginFormat::getPluginInstanceFromVstEffectInterface() which can be used
 for devious purposes to retrieve a plugin's AudioPluginInstance object from
 an AEffect

---
 .../format_types/juce_VSTPluginFormat.cpp                | 9 +++++++++
 .../format_types/juce_VSTPluginFormat.h                  | 5 +++++
 2 files changed, 14 insertions(+)

diff --git a/modules/juce_audio_processors/format_types/juce_VSTPluginFormat.cpp b/modules/juce_audio_processors/format_types/juce_VSTPluginFormat.cpp
index 1d96f370df..5c2d360eb6 100644
--- a/modules/juce_audio_processors/format_types/juce_VSTPluginFormat.cpp
+++ b/modules/juce_audio_processors/format_types/juce_VSTPluginFormat.cpp
@@ -3037,6 +3037,15 @@ void VSTPluginFormat::setExtraFunctions (AudioPluginInstance* plugin, ExtraFunct
         vst->extraFunctions = f;
 }
 
+AudioPluginInstance* VSTPluginFormat::getPluginInstanceFromVstEffectInterface (void* aEffect)
+{
+	if (VstEffectInterface* vstAEffect = reinterpret_cast<VstEffectInterface*> (aEffect))
+        if (VSTPluginInstance* instanceVST = reinterpret_cast<VSTPluginInstance*> (vstAEffect->hostSpace2))
+            return dynamic_cast<AudioPluginInstance*> (instanceVST);
+
+    return nullptr;
+}
+
 pointer_sized_int JUCE_CALLTYPE VSTPluginFormat::dispatcher (AudioPluginInstance* plugin, int32 opcode, int32 index, pointer_sized_int value, void* ptr, float opt)
 {
     if (VSTPluginInstance* vst = dynamic_cast<VSTPluginInstance*> (plugin))
diff --git a/modules/juce_audio_processors/format_types/juce_VSTPluginFormat.h b/modules/juce_audio_processors/format_types/juce_VSTPluginFormat.h
index 5bfa58c682..d3b7d9fa82 100644
--- a/modules/juce_audio_processors/format_types/juce_VSTPluginFormat.h
+++ b/modules/juce_audio_processors/format_types/juce_VSTPluginFormat.h
@@ -85,6 +85,11 @@ public:
     /** This simply calls directly to the VST's AEffect::dispatcher() function. */
     static pointer_sized_int JUCE_CALLTYPE dispatcher (AudioPluginInstance*, int32, int32, pointer_sized_int, void*, float);
 
+    /** Given a VstEffectInterface* (aka vst::AEffect*), this will return the juce AudioPluginInstance
+        that is being used to wrap it
+    */
+    static AudioPluginInstance* getPluginInstanceFromVstEffectInterface (void* aEffect);
+
     //==============================================================================
     String getName() const override                { return "VST"; }
     void findAllTypesForFile (OwnedArray<PluginDescription>&, const String& fileOrIdentifier) override;