HostedAudioProcessorParameter: Extract from AudioPluginInstance

modules/juce_audio_processors/juce_audio_processors.h

@@ -120,6 +120,7 @@
 #include "utilities/juce_VST3ClientExtensions.h"
 #include "utilities/juce_ExtensionsVisitor.h"
 #include "processors/juce_AudioProcessorParameter.h"
+#include "processors/juce_HostedAudioProcessorParameter.h"
 #include "processors/juce_AudioProcessorEditorHostContext.h"
 #include "processors/juce_AudioProcessorEditor.h"
 #include "processors/juce_AudioProcessorListener.h"

modules/juce_audio_processors/processors/juce_AudioPluginInstance.h

@@ -76,23 +76,7 @@ public:
     */
     virtual void getExtensions (ExtensionsVisitor&) const;
 
-    /**
-        A parameter with functions which are useful for plugin hosts.
-    */
-    struct HostedParameter : public AudioProcessorParameter
-    {
-        /** Returns an ID which is unique to this parameter.
-
-            Parameter indices are unstable across plugin versions, which means that the
-            parameter found at a particular index in one version of a plugin might move
-            to a different index in the subsequent version.
-
-            Unlike the parameter index, the ID returned by this function should be
-            somewhat stable (depending on the format of the plugin), so it is more
-            suitable for storing/recalling automation data.
-        */
-        virtual String getParameterID() const = 0;
-    };
+    using HostedParameter = HostedAudioProcessorParameter;
 
     /** Adds a parameter to this instance.
 

modules/juce_audio_processors/processors/juce_HostedAudioProcessorParameter.h

@@ -0,0 +1,50 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2020 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   By using JUCE, you agree to the terms of both the JUCE 6 End-User License
+   Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
+
+   End User License Agreement: www.juce.com/juce-6-licence
+   Privacy Policy: www.juce.com/juce-privacy-policy
+
+   Or: You may also use this code under the terms of the GPL v3 (see
+   www.gnu.org/licenses).
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+//==============================================================================
+/**
+    A parameter with functions that are useful for plugin hosts.
+
+    @tags{Audio}
+*/
+struct HostedAudioProcessorParameter : public AudioProcessorParameter
+{
+    /** Returns an ID that is unique to this parameter.
+
+        Parameter indices are unstable across plugin versions, which means that the
+        parameter found at a particular index in one version of a plugin might move
+        to a different index in the subsequent version.
+
+        Unlike the parameter index, the ID returned by this function should be
+        somewhat stable (depending on the format of the plugin), so it is more
+        suitable for storing/recalling automation data.
+    */
+    virtual String getParameterID() const = 0;
+};
+
+} // namespace juce

modules/juce_audio_processors/utilities/juce_AudioProcessorParameterWithID.h

@@ -33,7 +33,7 @@ namespace juce
 
     @tags{Audio}
 */
-class JUCE_API  AudioProcessorParameterWithID  : public AudioProcessorParameter
+class JUCE_API  AudioProcessorParameterWithID  : public HostedAudioProcessorParameter
 {
 public:
     /** The creation of this object requires providing a name and ID which will be
@@ -63,6 +63,8 @@ public:
     String getLabel() const override;
     Category getCategory() const override;
 
+    String getParameterID() const override { return paramID; }
+
 private:
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioProcessorParameterWithID)
 };