juce_VSTCallbackHandler.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - 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 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-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
{

struct VSTCallbackHandler
{
    virtual ~VSTCallbackHandler() = default;

    virtual pointer_sized_int handleVstPluginCanDo (int32 index,
                                                    pointer_sized_int value,
                                                    void* ptr,
                                                    float opt)
    {
        ignoreUnused (index, value, ptr, opt);
        return 0;
    }

    virtual pointer_sized_int handleVstManufacturerSpecific (int32 index,
                                                             pointer_sized_int value,
                                                             void* ptr,
                                                             float opt) = 0;
 
    // Note: VS2013 prevents a "using" declaration here
    typedef pointer_sized_int (VstHostCallbackType) (int32 opcode,
                                                     int32 index,
                                                     pointer_sized_int value,
                                                     void* ptr,
                                                     float opt);

    virtual void handleVstHostCallbackAvailable (std::function<VstHostCallbackType>&& callback)
    {
        ignoreUnused (callback);
    }
};
 
} // namespace juce