JUCE/modules/juce_audio_plugin_client/AAX/juce_AAX_Wrapper.cpp

/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#include "../../juce_core/system/juce_TargetPlatform.h"
#include "../utility/juce_CheckSettingMacros.h"

#if JucePlugin_Build_AAX && (JUCE_INCLUDED_AAX_IN_MM || defined (_WIN32) || defined (_WIN64))

#include "../utility/juce_IncludeSystemHeaders.h"
#include "../utility/juce_IncludeModuleHeaders.h"
#include "../utility/juce_WindowsHooks.h"
#include "../utility/juce_FakeMouseMoveGenerator.h"

#include "../../juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"

JUCE_BEGIN_IGNORE_WARNINGS_MSVC (4127 4512 4996)
JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wnon-virtual-dtor",
                                     "-Wsign-conversion",
                                     "-Wextra-semi",
                                     "-Wshift-sign-overflow",
                                     "-Wpragma-pack",
                                     "-Wzero-as-null-pointer-constant",
                                     "-Winconsistent-missing-destructor-override")

#include <AAX_Version.h>

static_assert (AAX_SDK_CURRENT_REVISION >= AAX_SDK_2p3p0_REVISION, "JUCE requires AAX SDK version 2.3.0 or higher");

#include <AAX_Exports.cpp>
#include <AAX_ICollection.h>
#include <AAX_IComponentDescriptor.h>
#include <AAX_IEffectDescriptor.h>
#include <AAX_IPropertyMap.h>
#include <AAX_CEffectParameters.h>
#include <AAX_Errors.h>
#include <AAX_CBinaryTaperDelegate.h>
#include <AAX_CBinaryDisplayDelegate.h>
#include <AAX_CLinearTaperDelegate.h>
#include <AAX_CNumberDisplayDelegate.h>
#include <AAX_CEffectGUI.h>
#include <AAX_IViewContainer.h>
#include <AAX_ITransport.h>
#include <AAX_IMIDINode.h>
#include <AAX_UtilsNative.h>
#include <AAX_Enums.h>
#include <AAX_IDescriptionHost.h>
#include <AAX_IFeatureInfo.h>
#include <AAX_UIDs.h>

#ifdef AAX_SDK_2p3p1_REVISION
 #if AAX_SDK_CURRENT_REVISION >= AAX_SDK_2p3p1_REVISION
  #include <AAX_Exception.h>
  #include <AAX_Assert.h>
 #endif
#endif

JUCE_END_IGNORE_WARNINGS_MSVC
JUCE_END_IGNORE_WARNINGS_GCC_LIKE

#if JUCE_WINDOWS
 #ifndef JucePlugin_AAXLibs_path
  #error "You need to define the JucePlugin_AAXLibs_path macro. (This is best done via the Projucer)"
 #endif

 #if JUCE_64BIT
  #define JUCE_AAX_LIB "AAXLibrary_x64"
 #else
  #define JUCE_AAX_LIB "AAXLibrary"
 #endif

 #if JUCE_DEBUG
  #define JUCE_AAX_LIB_PATH   "\\Debug\\"
  #define JUCE_AAX_LIB_SUFFIX "_D"
 #else
  #define JUCE_AAX_LIB_PATH   "\\Release\\"
  #define JUCE_AAX_LIB_SUFFIX ""
 #endif

 #pragma comment(lib, JucePlugin_AAXLibs_path JUCE_AAX_LIB_PATH JUCE_AAX_LIB JUCE_AAX_LIB_SUFFIX ".lib")
#endif

#undef check

#include "juce_AAX_Modifier_Injector.h"

using namespace juce;

#ifndef JucePlugin_AAX_Chunk_Identifier
 #define JucePlugin_AAX_Chunk_Identifier     'juce'
#endif

const int32_t juceChunkType = JucePlugin_AAX_Chunk_Identifier;

//==============================================================================
namespace AAXClasses
{
    static int32 getAAXParamHash (AAX_CParamID paramID) noexcept
    {
        int32 result = 0;

        while (*paramID != 0)
            result = (31 * result) + (*paramID++);

        return result;
    }

    static void check (AAX_Result result)
    {
        jassert (result == AAX_SUCCESS); ignoreUnused (result);
    }

    // maps a channel index of an AAX format to an index of a juce format
    struct AAXChannelStreamOrder
    {
        AAX_EStemFormat aaxStemFormat;
        AudioChannelSet::ChannelType speakerOrder[10];
    };

    static AAX_EStemFormat stemFormatForAmbisonicOrder (int order)
    {
        switch (order)
        {
            case 1:   return AAX_eStemFormat_Ambi_1_ACN;
            case 2:   return AAX_eStemFormat_Ambi_2_ACN;
            case 3:   return AAX_eStemFormat_Ambi_3_ACN;
            default:  break;
        }

        return AAX_eStemFormat_INT32_MAX;
    }

    static AAXChannelStreamOrder aaxChannelOrder[] =
    {
        { AAX_eStemFormat_Mono,     { AudioChannelSet::centre, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown,
                                      AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_Stereo,   { AudioChannelSet::left, AudioChannelSet::right, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown,
                                      AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_LCR,      { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::unknown, AudioChannelSet::unknown,
                                      AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_LCRS,     { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::centreSurround, AudioChannelSet::unknown,
                                      AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_Quad,     { AudioChannelSet::left, AudioChannelSet::right,  AudioChannelSet::leftSurround, AudioChannelSet::rightSurround, AudioChannelSet::unknown,
                                      AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_5_0,      { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::leftSurround, AudioChannelSet::rightSurround,
                                      AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_5_1,      { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::leftSurround, AudioChannelSet::rightSurround,
                                      AudioChannelSet::LFE, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_6_0,      { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::leftSurround, AudioChannelSet::centreSurround,
                                      AudioChannelSet::rightSurround, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_6_1,      { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::leftSurround, AudioChannelSet::centreSurround,
                                      AudioChannelSet::rightSurround, AudioChannelSet::LFE, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_7_0_SDDS, { AudioChannelSet::left, AudioChannelSet::leftCentre, AudioChannelSet::centre, AudioChannelSet::rightCentre, AudioChannelSet::right,
                                      AudioChannelSet::leftSurround, AudioChannelSet::rightSurround, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_7_0_DTS,  { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::leftSurroundSide, AudioChannelSet::rightSurroundSide,
                                      AudioChannelSet::leftSurroundRear, AudioChannelSet::rightSurroundRear, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_7_1_SDDS, { AudioChannelSet::left, AudioChannelSet::leftCentre, AudioChannelSet::centre, AudioChannelSet::rightCentre, AudioChannelSet::right,
                                      AudioChannelSet::leftSurround, AudioChannelSet::rightSurround, AudioChannelSet::LFE, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_7_1_DTS,  { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::leftSurroundSide, AudioChannelSet::rightSurroundSide,
                                      AudioChannelSet::leftSurroundRear, AudioChannelSet::rightSurroundRear, AudioChannelSet::LFE, AudioChannelSet::unknown, AudioChannelSet::unknown } },

        { AAX_eStemFormat_7_0_2,    { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::leftSurroundSide, AudioChannelSet::rightSurroundSide,
                                      AudioChannelSet::leftSurroundRear, AudioChannelSet::rightSurroundRear, AudioChannelSet::topSideLeft, AudioChannelSet::topSideRight, AudioChannelSet::unknown } },

        { AAX_eStemFormat_7_1_2,    { AudioChannelSet::left, AudioChannelSet::centre, AudioChannelSet::right, AudioChannelSet::leftSurroundSide, AudioChannelSet::rightSurroundSide,
                                      AudioChannelSet::leftSurroundRear, AudioChannelSet::rightSurroundRear, AudioChannelSet::LFE, AudioChannelSet::topSideLeft, AudioChannelSet::topSideRight } },

        { AAX_eStemFormat_None,     { AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown,
                                      AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown, AudioChannelSet::unknown } },
    };

    static AAX_EStemFormat aaxFormats[] =
    {
        AAX_eStemFormat_Mono,
        AAX_eStemFormat_Stereo,
        AAX_eStemFormat_LCR,
        AAX_eStemFormat_LCRS,
        AAX_eStemFormat_Quad,
        AAX_eStemFormat_5_0,
        AAX_eStemFormat_5_1,
        AAX_eStemFormat_6_0,
        AAX_eStemFormat_6_1,
        AAX_eStemFormat_7_0_SDDS,
        AAX_eStemFormat_7_1_SDDS,
        AAX_eStemFormat_7_0_DTS,
        AAX_eStemFormat_7_1_DTS,
        AAX_eStemFormat_7_0_2,
        AAX_eStemFormat_7_1_2,
        AAX_eStemFormat_Ambi_1_ACN,
        AAX_eStemFormat_Ambi_2_ACN,
        AAX_eStemFormat_Ambi_3_ACN
    };

    static AAX_EStemFormat getFormatForAudioChannelSet (const AudioChannelSet& set, bool ignoreLayout) noexcept
    {
        // if the plug-in ignores layout, it is ok to convert between formats only by their numchannnels
        if (ignoreLayout)
        {
            auto numChannels = set.size();

            switch (numChannels)
            {
                case 0:   return AAX_eStemFormat_None;
                case 1:   return AAX_eStemFormat_Mono;
                case 2:   return AAX_eStemFormat_Stereo;
                case 3:   return AAX_eStemFormat_LCR;
                case 4:   return AAX_eStemFormat_Quad;
                case 5:   return AAX_eStemFormat_5_0;
                case 6:   return AAX_eStemFormat_5_1;
                case 7:   return AAX_eStemFormat_7_0_DTS;
                case 8:   return AAX_eStemFormat_7_1_DTS;
                case 9:   return AAX_eStemFormat_7_0_2;
                case 10:  return AAX_eStemFormat_7_1_2;
                default:  break;
            }

            // check for ambisonics support
            auto sqrtMinusOne   = std::sqrt (static_cast<float> (numChannels)) - 1.0f;
            auto ambisonicOrder = jmax (0, static_cast<int> (std::floor (sqrtMinusOne)));

            if (static_cast<float> (ambisonicOrder) == sqrtMinusOne)
                return stemFormatForAmbisonicOrder (ambisonicOrder);

            return AAX_eStemFormat_INT32_MAX;
        }

        if (set == AudioChannelSet::disabled())             return AAX_eStemFormat_None;
        if (set == AudioChannelSet::mono())                 return AAX_eStemFormat_Mono;
        if (set == AudioChannelSet::stereo())               return AAX_eStemFormat_Stereo;
        if (set == AudioChannelSet::createLCR())            return AAX_eStemFormat_LCR;
        if (set == AudioChannelSet::createLCRS())           return AAX_eStemFormat_LCRS;
        if (set == AudioChannelSet::quadraphonic())         return AAX_eStemFormat_Quad;
        if (set == AudioChannelSet::create5point0())        return AAX_eStemFormat_5_0;
        if (set == AudioChannelSet::create5point1())        return AAX_eStemFormat_5_1;
        if (set == AudioChannelSet::create6point0())        return AAX_eStemFormat_6_0;
        if (set == AudioChannelSet::create6point1())        return AAX_eStemFormat_6_1;
        if (set == AudioChannelSet::create7point0())        return AAX_eStemFormat_7_0_DTS;
        if (set == AudioChannelSet::create7point1())        return AAX_eStemFormat_7_1_DTS;
        if (set == AudioChannelSet::create7point0SDDS())    return AAX_eStemFormat_7_0_SDDS;
        if (set == AudioChannelSet::create7point1SDDS())    return AAX_eStemFormat_7_1_SDDS;
        if (set == AudioChannelSet::create7point0point2())  return AAX_eStemFormat_7_0_2;
        if (set == AudioChannelSet::create7point1point2())  return AAX_eStemFormat_7_1_2;

        auto order = set.getAmbisonicOrder();
        if (order >= 0)
            return stemFormatForAmbisonicOrder (order);

        return AAX_eStemFormat_INT32_MAX;
    }

    static AudioChannelSet channelSetFromStemFormat (AAX_EStemFormat format, bool ignoreLayout) noexcept
    {
        if (! ignoreLayout)
        {
            switch (format)
            {
                case AAX_eStemFormat_None:       return AudioChannelSet::disabled();
                case AAX_eStemFormat_Mono:       return AudioChannelSet::mono();
                case AAX_eStemFormat_Stereo:     return AudioChannelSet::stereo();
                case AAX_eStemFormat_LCR:        return AudioChannelSet::createLCR();
                case AAX_eStemFormat_LCRS:       return AudioChannelSet::createLCRS();
                case AAX_eStemFormat_Quad:       return AudioChannelSet::quadraphonic();
                case AAX_eStemFormat_5_0:        return AudioChannelSet::create5point0();
                case AAX_eStemFormat_5_1:        return AudioChannelSet::create5point1();
                case AAX_eStemFormat_6_0:        return AudioChannelSet::create6point0();
                case AAX_eStemFormat_6_1:        return AudioChannelSet::create6point1();
                case AAX_eStemFormat_7_0_SDDS:   return AudioChannelSet::create7point0SDDS();
                case AAX_eStemFormat_7_0_DTS:    return AudioChannelSet::create7point0();
                case AAX_eStemFormat_7_1_SDDS:   return AudioChannelSet::create7point1SDDS();
                case AAX_eStemFormat_7_1_DTS:    return AudioChannelSet::create7point1();
                case AAX_eStemFormat_7_0_2:      return AudioChannelSet::create7point0point2();
                case AAX_eStemFormat_7_1_2:      return AudioChannelSet::create7point1point2();
                case AAX_eStemFormat_Ambi_1_ACN: return AudioChannelSet::ambisonic (1);
                case AAX_eStemFormat_Ambi_2_ACN: return AudioChannelSet::ambisonic (2);
                case AAX_eStemFormat_Ambi_3_ACN: return AudioChannelSet::ambisonic (3);
                case AAX_eStemFormat_Reserved_1:
                case AAX_eStemFormat_Reserved_2:
                case AAX_eStemFormat_Reserved_3:
                case AAX_eStemFormatNum:
                case AAX_eStemFormat_Any:
                case AAX_eStemFormat_INT32_MAX:
                default:                         return AudioChannelSet::disabled();
            }
        }

        return AudioChannelSet::discreteChannels (jmax (0, static_cast<int> (AAX_STEM_FORMAT_CHANNEL_COUNT (format))));
    }

    static AAX_EMeterType getMeterTypeForCategory (AudioProcessorParameter::Category category)
    {
        switch (category)
        {
            case AudioProcessorParameter::inputMeter:                           return AAX_eMeterType_Input;
            case AudioProcessorParameter::outputMeter:                          return AAX_eMeterType_Output;
            case AudioProcessorParameter::compressorLimiterGainReductionMeter:  return AAX_eMeterType_CLGain;
            case AudioProcessorParameter::expanderGateGainReductionMeter:       return AAX_eMeterType_EGGain;
            case AudioProcessorParameter::analysisMeter:                        return AAX_eMeterType_Analysis;
            case AudioProcessorParameter::genericParameter:
            case AudioProcessorParameter::inputGain:
            case AudioProcessorParameter::outputGain:
            case AudioProcessorParameter::otherMeter:
            default:                                                            return AAX_eMeterType_Other;
        }
    }

    static Colour getColourFromHighlightEnum (AAX_EHighlightColor colour) noexcept
    {
        switch (colour)
        {
            case AAX_eHighlightColor_Red:       return Colours::red;
            case AAX_eHighlightColor_Blue:      return Colours::blue;
            case AAX_eHighlightColor_Green:     return Colours::green;
            case AAX_eHighlightColor_Yellow:    return Colours::yellow;
            case AAX_eHighlightColor_Num:
            default:                            jassertfalse; break;
        }

        return Colours::black;
    }

    static int juceChannelIndexToAax (int juceIndex, const AudioChannelSet& channelSet)
    {
        auto isAmbisonic = (channelSet.getAmbisonicOrder() >= 0);
        auto currentLayout = getFormatForAudioChannelSet (channelSet, false);
        int layoutIndex;

        if (isAmbisonic && currentLayout != AAX_eStemFormat_INT32_MAX)
            return juceIndex;

        for (layoutIndex = 0; aaxChannelOrder[layoutIndex].aaxStemFormat != currentLayout; ++layoutIndex)
            if (aaxChannelOrder[layoutIndex].aaxStemFormat == 0) return juceIndex;

        auto& channelOrder = aaxChannelOrder[layoutIndex];
        auto channelType = channelSet.getTypeOfChannel (static_cast<int> (juceIndex));
        auto numSpeakers = numElementsInArray (channelOrder.speakerOrder);

        for (int i = 0; i < numSpeakers && channelOrder.speakerOrder[i] != 0; ++i)
            if (channelOrder.speakerOrder[i] == channelType)
                return i;

        return juceIndex;
    }

    //==============================================================================
    class JuceAAX_Processor;

    struct PluginInstanceInfo
    {
        PluginInstanceInfo (JuceAAX_Processor& p)  : parameters (p) {}

        JuceAAX_Processor& parameters;

        JUCE_DECLARE_NON_COPYABLE (PluginInstanceInfo)
    };

    //==============================================================================
    struct JUCEAlgorithmContext
    {
        float** inputChannels;
        float** outputChannels;
        int32_t* bufferSize;
        int32_t* bypass;

       #if JucePlugin_WantsMidiInput || JucePlugin_IsMidiEffect
        AAX_IMIDINode* midiNodeIn;
       #endif

       #if JucePlugin_ProducesMidiOutput || JucePlugin_IsSynth || JucePlugin_IsMidiEffect
        AAX_IMIDINode* midiNodeOut;
       #endif

        PluginInstanceInfo* pluginInstance;
        int32_t* isPrepared;
        float* const* meterTapBuffers;
        int32_t* sideChainBuffers;
    };

    struct JUCEAlgorithmIDs
    {
        enum
        {
            inputChannels     = AAX_FIELD_INDEX (JUCEAlgorithmContext, inputChannels),
            outputChannels    = AAX_FIELD_INDEX (JUCEAlgorithmContext, outputChannels),
            bufferSize        = AAX_FIELD_INDEX (JUCEAlgorithmContext, bufferSize),
            bypass            = AAX_FIELD_INDEX (JUCEAlgorithmContext, bypass),

           #if JucePlugin_WantsMidiInput || JucePlugin_IsMidiEffect
            midiNodeIn        = AAX_FIELD_INDEX (JUCEAlgorithmContext, midiNodeIn),
           #endif

           #if JucePlugin_ProducesMidiOutput || JucePlugin_IsSynth || JucePlugin_IsMidiEffect
            midiNodeOut       = AAX_FIELD_INDEX (JUCEAlgorithmContext, midiNodeOut),
           #endif

            pluginInstance    = AAX_FIELD_INDEX (JUCEAlgorithmContext, pluginInstance),
            preparedFlag      = AAX_FIELD_INDEX (JUCEAlgorithmContext, isPrepared),

            meterTapBuffers   = AAX_FIELD_INDEX (JUCEAlgorithmContext, meterTapBuffers),

            sideChainBuffers  = AAX_FIELD_INDEX (JUCEAlgorithmContext, sideChainBuffers)
        };
    };

   #if JucePlugin_WantsMidiInput || JucePlugin_IsMidiEffect
    static AAX_IMIDINode* getMidiNodeIn (const JUCEAlgorithmContext& c) noexcept   { return c.midiNodeIn; }
   #else
    static AAX_IMIDINode* getMidiNodeIn (const JUCEAlgorithmContext&) noexcept     { return nullptr; }
   #endif

   #if JucePlugin_ProducesMidiOutput || JucePlugin_IsSynth || JucePlugin_IsMidiEffect
    AAX_IMIDINode* midiNodeOut;
    static AAX_IMIDINode* getMidiNodeOut (const JUCEAlgorithmContext& c) noexcept  { return c.midiNodeOut; }
   #else
    static AAX_IMIDINode* getMidiNodeOut (const JUCEAlgorithmContext&) noexcept    { return nullptr; }
   #endif

    //==============================================================================
    class JuceAAX_Processor;

    class JuceAAX_GUI   : public AAX_CEffectGUI,
                          public ModifierKeyProvider
    {
    public:
        JuceAAX_GUI() = default;
        ~JuceAAX_GUI() override { DeleteViewContainer(); }

        static AAX_IEffectGUI* AAX_CALLBACK Create()   { return new JuceAAX_GUI(); }

        void CreateViewContents() override;

        void CreateViewContainer() override
        {
            CreateViewContents();

            if (void* nativeViewToAttachTo = GetViewContainerPtr())
            {
               #if JUCE_MAC
                if (GetViewContainerType() == AAX_eViewContainer_Type_NSView)
               #else
                if (GetViewContainerType() == AAX_eViewContainer_Type_HWND)
               #endif
                {
                    component->setVisible (true);
                    component->addToDesktop (0, nativeViewToAttachTo);

                    if (ModifierKeyReceiver* modReceiver = dynamic_cast<ModifierKeyReceiver*> (component->getPeer()))
                        modReceiver->setModifierKeyProvider (this);
                }
            }
        }

        void DeleteViewContainer() override
        {
            if (component != nullptr)
            {
                JUCE_AUTORELEASEPOOL
                {
                    if (auto* modReceiver = dynamic_cast<ModifierKeyReceiver*> (component->getPeer()))
                        modReceiver->removeModifierKeyProvider();

                    component->removeFromDesktop();
                    component = nullptr;
                }
            }
        }

        AAX_Result GetViewSize (AAX_Point* viewSize) const override
        {
            if (component != nullptr)
            {
                viewSize->horz = (float) component->getWidth();
                viewSize->vert = (float) component->getHeight();
                return AAX_SUCCESS;
            }

            return AAX_ERROR_NULL_OBJECT;
        }

        AAX_Result ParameterUpdated (AAX_CParamID) override
        {
            return AAX_SUCCESS;
        }

        AAX_Result SetControlHighlightInfo (AAX_CParamID paramID, AAX_CBoolean isHighlighted, AAX_EHighlightColor colour) override
        {
            if (component != nullptr && component->pluginEditor != nullptr)
            {
                auto index = getParamIndexFromID (paramID);

                if (index >= 0)
                {
                    AudioProcessorEditor::ParameterControlHighlightInfo info;
                    info.parameterIndex  = index;
                    info.isHighlighted   = (isHighlighted != 0);
                    info.suggestedColour = getColourFromHighlightEnum (colour);

                    component->pluginEditor->setControlHighlight (info);
                }

                return AAX_SUCCESS;
            }

            return AAX_ERROR_NULL_OBJECT;
        }

        int getWin32Modifiers() const override
        {
            int modifierFlags = 0;

            if (auto* viewContainer = GetViewContainer())
            {
                uint32 aaxViewMods = 0;
                const_cast<AAX_IViewContainer*> (viewContainer)->GetModifiers (&aaxViewMods);

                if ((aaxViewMods & AAX_eModifiers_Shift) != 0) modifierFlags |= ModifierKeys::shiftModifier;
                if ((aaxViewMods & AAX_eModifiers_Alt )  != 0) modifierFlags |= ModifierKeys::altModifier;
            }

            return modifierFlags;
        }

    private:
        //==============================================================================
        int getParamIndexFromID (AAX_CParamID paramID) const noexcept;
        AAX_CParamID getAAXParamIDFromJuceIndex (int index) const noexcept;

        //==============================================================================
        struct ContentWrapperComponent  : public Component
        {
            ContentWrapperComponent (JuceAAX_GUI& gui, AudioProcessor& plugin)
                : owner (gui)
            {
                setOpaque (true);
                setBroughtToFrontOnMouseClick (true);

                pluginEditor.reset (plugin.createEditorIfNeeded());
                addAndMakeVisible (pluginEditor.get());

                if (pluginEditor != nullptr)
                {
                    lastValidSize = pluginEditor->getLocalBounds();
                    setBounds (lastValidSize);
                    pluginEditor->addMouseListener (this, true);
                }

                ignoreUnused (fakeMouseGenerator);
            }

            ~ContentWrapperComponent() override
            {
                if (pluginEditor != nullptr)
                {
                    PopupMenu::dismissAllActiveMenus();
                    pluginEditor->removeMouseListener (this);
                    pluginEditor->processor.editorBeingDeleted (pluginEditor.get());
                }
            }

            void paint (Graphics& g) override
            {
                g.fillAll (Colours::black);
            }

            template <typename MethodType>
            void callMouseMethod (const MouseEvent& e, MethodType method)
            {
                if (auto* vc = owner.GetViewContainer())
                {
                    auto parameterIndex = pluginEditor->getControlParameterIndex (*e.eventComponent);

                    if (auto aaxParamID = owner.getAAXParamIDFromJuceIndex (parameterIndex))
                    {
                        uint32_t mods = 0;
                        vc->GetModifiers (&mods);

                        (vc->*method) (aaxParamID, mods);
                    }
                }
            }

            void mouseDown (const MouseEvent& e) override  { callMouseMethod (e, &AAX_IViewContainer::HandleParameterMouseDown); }
            void mouseUp   (const MouseEvent& e) override  { callMouseMethod (e, &AAX_IViewContainer::HandleParameterMouseUp); }
            void mouseDrag (const MouseEvent& e) override  { callMouseMethod (e, &AAX_IViewContainer::HandleParameterMouseDrag); }

            void childBoundsChanged (Component*) override
            {
                if (pluginEditor != nullptr)
                {
                    auto w = pluginEditor->getWidth();
                    auto h = pluginEditor->getHeight();

                    AAX_Point newSize ((float) h, (float) w);

                    if (owner.GetViewContainer()->SetViewSize (newSize) == AAX_SUCCESS)
                    {
                        setSize (w, h);
                        lastValidSize = getBounds();
                    }
                    else
                    {
                        auto validSize = pluginEditor->getBounds().withSize (lastValidSize.getWidth(), lastValidSize.getHeight());
                        pluginEditor->setBoundsConstrained (validSize);
                    }
                }
            }

            std::unique_ptr<AudioProcessorEditor> pluginEditor;
            JuceAAX_GUI& owner;

           #if JUCE_WINDOWS
            WindowsHooks hooks;
           #endif
            FakeMouseMoveGenerator fakeMouseGenerator;
            juce::Rectangle<int> lastValidSize;

            JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ContentWrapperComponent)
        };

        std::unique_ptr<ContentWrapperComponent> component;
        ScopedJuceInitialiser_GUI libraryInitialiser;

        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (JuceAAX_GUI)
    };

    static void AAX_CALLBACK algorithmProcessCallback (JUCEAlgorithmContext* const instancesBegin[], const void* const instancesEnd);

    static Array<JuceAAX_Processor*> activeProcessors;

    //==============================================================================
    class JuceAAX_Processor   : public AAX_CEffectParameters,
                                public juce::AudioPlayHead,
                                public AudioProcessorListener,
                                private AsyncUpdater
    {
    public:
        JuceAAX_Processor()
            : pluginInstance (createPluginFilterOfType (AudioProcessor::wrapperType_AAX))
        {
            inParameterChangedCallback = false;

            pluginInstance->setPlayHead (this);
            pluginInstance->addListener (this);

            rebuildChannelMapArrays();

            AAX_CEffectParameters::GetNumberOfChunks (&juceChunkIndex);
            activeProcessors.add (this);
        }

        ~JuceAAX_Processor() override
        {
            activeProcessors.removeAllInstancesOf (this);
        }

        static AAX_CEffectParameters* AAX_CALLBACK Create()
        {
            PluginHostType::jucePlugInClientCurrentWrapperType = AudioProcessor::wrapperType_AAX;

            if (PluginHostType::jucePlugInIsRunningInAudioSuiteFn == nullptr)
            {
                PluginHostType::jucePlugInIsRunningInAudioSuiteFn = [] (AudioProcessor& processor)
                {
                    for (auto* p : activeProcessors)
                        if (&p->getPluginInstance() == &processor)
                            return p->isInAudioSuite();

                    return false;
                };
            }

            return new JuceAAX_Processor();
        }

        AAX_Result Uninitialize() override
        {
            cancelPendingUpdate();
            juceParameters.clear();

            if (isPrepared && pluginInstance != nullptr)
            {
                isPrepared = false;
                processingSidechainChange = false;

                pluginInstance->releaseResources();
            }

            return AAX_CEffectParameters::Uninitialize();
        }

        AAX_Result EffectInit() override
        {
            cancelPendingUpdate();
            check (Controller()->GetSampleRate (&sampleRate));
            processingSidechainChange = false;
            auto err = preparePlugin();

            if (err != AAX_SUCCESS)
                return err;

            addAudioProcessorParameters();

            return AAX_SUCCESS;
        }

        AAX_Result GetNumberOfChunks (int32_t* numChunks) const override
        {
            // The juceChunk is the last chunk.
            *numChunks = juceChunkIndex + 1;
            return AAX_SUCCESS;
        }

        AAX_Result GetChunkIDFromIndex (int32_t index, AAX_CTypeID* chunkID) const override
        {
            if (index != juceChunkIndex)
                return AAX_CEffectParameters::GetChunkIDFromIndex (index, chunkID);

            *chunkID = juceChunkType;
            return AAX_SUCCESS;
        }

        AAX_Result GetChunkSize (AAX_CTypeID chunkID, uint32_t* oSize) const override
        {
            if (chunkID != juceChunkType)
                return AAX_CEffectParameters::GetChunkSize (chunkID, oSize);

            auto& chunkMemoryBlock = perThreadFilterData.get();

            chunkMemoryBlock.data.reset();
            pluginInstance->getStateInformation (chunkMemoryBlock.data);
            chunkMemoryBlock.isValid = true;

            *oSize = (uint32_t) chunkMemoryBlock.data.getSize();
            return AAX_SUCCESS;
        }

        AAX_Result GetChunk (AAX_CTypeID chunkID, AAX_SPlugInChunk* oChunk) const override
        {
            if (chunkID != juceChunkType)
                return AAX_CEffectParameters::GetChunk (chunkID, oChunk);

            auto& chunkMemoryBlock = perThreadFilterData.get();

            if (! chunkMemoryBlock.isValid)
                return 20700; // AAX_ERROR_PLUGIN_API_INVALID_THREAD

            oChunk->fSize = (int32_t) chunkMemoryBlock.data.getSize();
            chunkMemoryBlock.data.copyTo (oChunk->fData, 0, chunkMemoryBlock.data.getSize());
            chunkMemoryBlock.isValid = false;

            return AAX_SUCCESS;
        }

        AAX_Result SetChunk (AAX_CTypeID chunkID, const AAX_SPlugInChunk* chunk) override
        {
            if (chunkID != juceChunkType)
                return AAX_CEffectParameters::SetChunk (chunkID, chunk);

            pluginInstance->setStateInformation ((void*) chunk->fData, chunk->fSize);

            // Notify Pro Tools that the parameters were updated.
            // Without it a bug happens in these circumstances:
            // * A preset is saved with the RTAS version of the plugin (".tfx" preset format).
            // * The preset is loaded in PT 10 using the AAX version.
            // * The session is then saved, and closed.
            // * The saved session is loaded, but acting as if the preset was never loaded.
            auto numParameters = juceParameters.getNumParameters();

            for (int i = 0; i < numParameters; ++i)
                if (auto paramID = getAAXParamIDFromJuceIndex(i))
                    SetParameterNormalizedValue (paramID, juceParameters.getParamForIndex (i)->getValue());

            return AAX_SUCCESS;
        }

        AAX_Result ResetFieldData (AAX_CFieldIndex fieldIndex, void* data, uint32_t dataSize) const override
        {
            switch (fieldIndex)
            {
                case JUCEAlgorithmIDs::pluginInstance:
                {
                    auto numObjects = dataSize / sizeof (PluginInstanceInfo);
                    auto* objects = static_cast<PluginInstanceInfo*> (data);

                    jassert (numObjects == 1); // not sure how to handle more than one..

                    for (size_t i = 0; i < numObjects; ++i)
                        new (objects + i) PluginInstanceInfo (const_cast<JuceAAX_Processor&> (*this));

                    break;
                }

                case JUCEAlgorithmIDs::preparedFlag:
                {
                    const_cast<JuceAAX_Processor*>(this)->preparePlugin();

                    auto numObjects = dataSize / sizeof (uint32_t);
                    auto* objects = static_cast<uint32_t*> (data);

                    for (size_t i = 0; i < numObjects; ++i)
                        objects[i] = 1;

                    break;
                }

                case JUCEAlgorithmIDs::meterTapBuffers:
                {
                    // this is a dummy field only when there are no aaxMeters
                    jassert (aaxMeters.size() == 0);

                    {
                        auto numObjects = dataSize / sizeof (float*);
                        auto* objects = static_cast<float**> (data);

                        for (size_t i = 0; i < numObjects; ++i)
                            objects[i] = nullptr;
                    }
                    break;
                }
            }

            return AAX_SUCCESS;
        }

        void setAudioProcessorParameter (AAX_CParamID paramID, double value)
        {
            if (auto* param = getParameterFromID (paramID))
            {
                auto newValue = static_cast<float> (value);

                if (newValue != param->getValue())
                {
                    param->setValue (newValue);

                    inParameterChangedCallback = true;
                    param->sendValueChangedMessageToListeners (newValue);
                }
            }
        }

        AAX_Result UpdateParameterNormalizedValue (AAX_CParamID paramID, double value, AAX_EUpdateSource source) override
        {
            auto result = AAX_CEffectParameters::UpdateParameterNormalizedValue (paramID, value, source);
            setAudioProcessorParameter (paramID, value);

            return result;
        }

        AAX_Result GetParameterValueFromString (AAX_CParamID paramID, double* result, const AAX_IString& text) const override
        {
            if (auto* param = getParameterFromID (paramID))
            {
                if (! LegacyAudioParameter::isLegacy (param))
                {
                    *result = param->getValueForText (text.Get());
                    return AAX_SUCCESS;
                }
            }

            return AAX_CEffectParameters::GetParameterValueFromString (paramID, result, text);
        }

        AAX_Result GetParameterStringFromValue (AAX_CParamID paramID, double value, AAX_IString* result, int32_t maxLen) const override
        {
            if (auto* param = getParameterFromID (paramID))
                result->Set (param->getText ((float) value, maxLen).toRawUTF8());

            return AAX_SUCCESS;
        }

        AAX_Result GetParameterNumberofSteps (AAX_CParamID paramID, int32_t* result) const
        {
            if (auto* param = getParameterFromID (paramID))
                *result = getSafeNumberOfParameterSteps (*param);

            return AAX_SUCCESS;
        }

        AAX_Result GetParameterNormalizedValue (AAX_CParamID paramID, double* result) const override
        {
            if (auto* param = getParameterFromID (paramID))
                *result = (double) param->getValue();
            else
                *result = 0.0;

            return AAX_SUCCESS;
        }

        AAX_Result SetParameterNormalizedValue (AAX_CParamID paramID, double newValue) override
        {
            if (auto* p = mParameterManager.GetParameterByID (paramID))
                p->SetValueWithFloat ((float) newValue);

            setAudioProcessorParameter (paramID, (float) newValue);

            return AAX_SUCCESS;
        }

        AAX_Result SetParameterNormalizedRelative (AAX_CParamID paramID, double newDeltaValue) override
        {
            if (auto* param = getParameterFromID (paramID))
            {
                auto newValue = param->getValue() + (float) newDeltaValue;

                setAudioProcessorParameter (paramID, jlimit (0.0f, 1.0f, newValue));

                if (auto* p = mParameterManager.GetParameterByID (paramID))
                    p->SetValueWithFloat (newValue);
            }

            return AAX_SUCCESS;
        }

        AAX_Result GetParameterNameOfLength (AAX_CParamID paramID, AAX_IString* result, int32_t maxLen) const override
        {
            if (auto* param = getParameterFromID (paramID))
                result->Set (param->getName (maxLen).toRawUTF8());

            return AAX_SUCCESS;
        }

        AAX_Result GetParameterName (AAX_CParamID paramID, AAX_IString* result) const override
        {
            if (auto* param = getParameterFromID (paramID))
                result->Set (param->getName (31).toRawUTF8());

            return AAX_SUCCESS;
        }

        AAX_Result GetParameterDefaultNormalizedValue (AAX_CParamID paramID, double* result) const override
        {
            if (auto* param = getParameterFromID (paramID))
                *result = (double) param->getDefaultValue();
            else
                *result = 0.0;

            jassert (*result >= 0 && *result <= 1.0f);

            return AAX_SUCCESS;
        }

        AudioProcessor& getPluginInstance() const noexcept   { return *pluginInstance; }

        bool getCurrentPosition (juce::AudioPlayHead::CurrentPositionInfo& info) override
        {
            const AAX_ITransport& transport = *Transport();

            info.bpm = 0.0;
            check (transport.GetCurrentTempo (&info.bpm));

            int32_t num = 4, den = 4;
            transport.GetCurrentMeter (&num, &den);
            info.timeSigNumerator   = (int) num;
            info.timeSigDenominator = (int) den;
            info.timeInSamples = 0;

            if (transport.IsTransportPlaying (&info.isPlaying) != AAX_SUCCESS)
                info.isPlaying = false;

            if (info.isPlaying
                 || transport.GetTimelineSelectionStartPosition (&info.timeInSamples) != AAX_SUCCESS)
                check (transport.GetCurrentNativeSampleLocation (&info.timeInSamples));

            info.timeInSeconds = info.timeInSamples / sampleRate;

            int64_t ticks = 0;

            if (info.isPlaying)
                check (transport.GetCustomTickPosition (&ticks, info.timeInSamples));
            else
                check (transport.GetCurrentTickPosition (&ticks));

            info.ppqPosition = ticks / 960000.0;

            info.isLooping = false;
            int64_t loopStartTick = 0, loopEndTick = 0;
            check (transport.GetCurrentLoopPosition (&info.isLooping, &loopStartTick, &loopEndTick));
            info.ppqLoopStart = loopStartTick / 960000.0;
            info.ppqLoopEnd   = loopEndTick   / 960000.0;

            info.editOriginTime = 0;
            info.frameRate = AudioPlayHead::fpsUnknown;

            AAX_EFrameRate frameRate;
            int32_t offset;

            if (transport.GetTimeCodeInfo (&frameRate, &offset) == AAX_SUCCESS)
            {
                double framesPerSec = 24.0;

                switch (frameRate)
                {
                    case AAX_eFrameRate_Undeclared:    break;
                    case AAX_eFrameRate_24Frame:       info.frameRate = AudioPlayHead::fps24;       break;
                    case AAX_eFrameRate_25Frame:       info.frameRate = AudioPlayHead::fps25;       framesPerSec = 25.0; break;
                    case AAX_eFrameRate_2997NonDrop:   info.frameRate = AudioPlayHead::fps2997;     framesPerSec = 30.0 * 1000.0 / 1001.0; break;
                    case AAX_eFrameRate_2997DropFrame: info.frameRate = AudioPlayHead::fps2997drop; framesPerSec = 30.0 * 1000.0 / 1001.0; break;
                    case AAX_eFrameRate_30NonDrop:     info.frameRate = AudioPlayHead::fps30;       framesPerSec = 30.0; break;
                    case AAX_eFrameRate_30DropFrame:   info.frameRate = AudioPlayHead::fps30drop;   framesPerSec = 30.0; break;
                    case AAX_eFrameRate_23976:         info.frameRate = AudioPlayHead::fps23976;    framesPerSec = 24.0 * 1000.0 / 1001.0; break;
                    default:                           break;
                }

                info.editOriginTime = offset / framesPerSec;
            }

            // No way to get these: (?)
            info.isRecording = false;
            info.ppqPositionOfLastBarStart = 0;

            return true;
        }

        void audioProcessorParameterChanged (AudioProcessor* /*processor*/, int parameterIndex, float newValue) override
        {
            if (inParameterChangedCallback.get())
            {
                inParameterChangedCallback = false;
                return;
            }

            if (auto paramID = getAAXParamIDFromJuceIndex (parameterIndex))
                SetParameterNormalizedValue (paramID, (double) newValue);
        }

        void audioProcessorChanged (AudioProcessor* processor) override
        {
            ++mNumPlugInChanges;

            auto numParameters = juceParameters.getNumParameters();

            for (int i = 0; i < numParameters; ++i)
            {
                if (auto* p = mParameterManager.GetParameterByID (getAAXParamIDFromJuceIndex (i)))
                {
                    auto newName = juceParameters.getParamForIndex (i)->getName (31);

                    if (p->Name() != newName.toRawUTF8())
                        p->SetName (AAX_CString (newName.toRawUTF8()));
                }
            }

            check (Controller()->SetSignalLatency (processor->getLatencySamples()));
        }

        void audioProcessorParameterChangeGestureBegin (AudioProcessor*, int parameterIndex) override
        {
            if (auto paramID = getAAXParamIDFromJuceIndex (parameterIndex))
                TouchParameter (paramID);
        }

        void audioProcessorParameterChangeGestureEnd (AudioProcessor*, int parameterIndex) override
        {
            if (auto paramID = getAAXParamIDFromJuceIndex (parameterIndex))
                ReleaseParameter (paramID);
        }

        AAX_Result NotificationReceived (AAX_CTypeID type, const void* data, uint32_t size) override
        {
            switch (type)
            {
                case AAX_eNotificationEvent_EnteringOfflineMode:  pluginInstance->setNonRealtime (true);  break;
                case AAX_eNotificationEvent_ExitingOfflineMode:   pluginInstance->setNonRealtime (false); break;

                case AAX_eNotificationEvent_TrackNameChanged:
                    if (data != nullptr)
                    {
                        AudioProcessor::TrackProperties props;
                        props.name = static_cast<const AAX_IString*> (data)->Get();

                        pluginInstance->updateTrackProperties (props);
                    }
                    break;

                case AAX_eNotificationEvent_SideChainBeingConnected:
                case AAX_eNotificationEvent_SideChainBeingDisconnected:
                {
                    processingSidechainChange = true;
                    sidechainDesired = (type == AAX_eNotificationEvent_SideChainBeingConnected);
                    updateSidechainState();
                    break;
                }
            }

            return AAX_CEffectParameters::NotificationReceived (type, data, size);
        }

        const float* getAudioBufferForInput (const float* const* inputs, int sidechain, int mainNumIns, int idx) const noexcept
        {
            jassert (idx < (mainNumIns + 1));

            if (idx < mainNumIns)
                return inputs[inputLayoutMap[idx]];

            return (sidechain != -1 ? inputs[sidechain] : sideChainBuffer.getData());
        }

        void process (const float* const* inputs, float* const* outputs, const int sideChainBufferIdx,
                      const int bufferSize, const bool bypass,
                      AAX_IMIDINode* midiNodeIn, AAX_IMIDINode* midiNodesOut,
                      float* const meterBuffers)
        {
            auto numIns    = pluginInstance->getTotalNumInputChannels();
            auto numOuts   = pluginInstance->getTotalNumOutputChannels();
            auto numMeters = aaxMeters.size();

            const ScopedLock sl (pluginInstance->getCallbackLock());

            bool isSuspended = [this, sideChainBufferIdx]
            {
                if (processingSidechainChange)
                    return true;

                bool processWantsSidechain = (sideChainBufferIdx != -1);

                if (hasSidechain && canDisableSidechain && (sidechainDesired != processWantsSidechain))
                {
                    sidechainDesired = processWantsSidechain;
                    processingSidechainChange = true;
                    triggerAsyncUpdate();
                    return true;
                }

                return pluginInstance->isSuspended();
            }();

            if (isSuspended)
            {
                for (int i = 0; i < numOuts; ++i)
                    FloatVectorOperations::clear (outputs[i], bufferSize);

                if (meterBuffers != nullptr)
                    FloatVectorOperations::clear (meterBuffers, numMeters);
            }
            else
            {
                auto mainNumIns = pluginInstance->getMainBusNumInputChannels();
                auto sidechain = (pluginInstance->getChannelCountOfBus (true, 1) > 0 ? sideChainBufferIdx : -1);
                auto numChans = jmax (numIns, numOuts);

                if (numChans == 0)
                    return;

                if (channelList.size() <= numChans)
                    channelList.insertMultiple (-1, nullptr, 1 + numChans - channelList.size());

                float** channels = channelList.getRawDataPointer();

                if (numOuts >= numIns)
                {
                    for (int i = 0; i < numOuts; ++i)
                        channels[i] = outputs[outputLayoutMap[i]];

                    for (int i = 0; i < numIns; ++i)
                        memcpy (channels[i], getAudioBufferForInput (inputs, sidechain, mainNumIns, i), (size_t) bufferSize * sizeof (float));

                    for (int i = numIns; i < numOuts; ++i)
                        zeromem (channels[i], (size_t) bufferSize * sizeof (float));

                    process (channels, numOuts, bufferSize, bypass, midiNodeIn, midiNodesOut);
                }
                else
                {
                    for (int i = 0; i < numOuts; ++i)
                        channels[i] = outputs[outputLayoutMap[i]];

                    for (int i = 0; i < numOuts; ++i)
                        memcpy (channels[i], getAudioBufferForInput (inputs, sidechain, mainNumIns, i), (size_t) bufferSize * sizeof (float));

                    for (int i = numOuts; i < numIns; ++i)
                        channels[i] = const_cast<float*> (getAudioBufferForInput (inputs, sidechain, mainNumIns, i));

                    process (channels, numIns, bufferSize, bypass, midiNodeIn, midiNodesOut);
                }

                if (meterBuffers != nullptr)
                    for (int i = 0; i < numMeters; ++i)
                        meterBuffers[i] = aaxMeters[i]->getValue();
            }
        }

        //==============================================================================
        // In aax, the format of the aux and sidechain buses need to be fully determined
        // by the format on the main buses. This function tried to provide such a mapping.
        // Returns false if the in/out main layout is not supported
        static bool fullBusesLayoutFromMainLayout (const AudioProcessor& p,
                                                   const AudioChannelSet& mainInput, const AudioChannelSet& mainOutput,
                                                   AudioProcessor::BusesLayout& fullLayout)
        {
            auto currentLayout = getDefaultLayout (p, true);
            bool success = p.checkBusesLayoutSupported (currentLayout);
            jassert (success);
            ignoreUnused (success);

            auto numInputBuses  = p.getBusCount (true);
            auto numOutputBuses = p.getBusCount (false);

            if (auto* bus = p.getBus (true, 0))
                if (! bus->isLayoutSupported (mainInput, &currentLayout))
                    return false;

            if (auto* bus = p.getBus (false, 0))
                if (! bus->isLayoutSupported (mainOutput, &currentLayout))
                    return false;

            // did this change the input again
            if (numInputBuses > 0 && currentLayout.inputBuses.getReference (0) != mainInput)
                return false;

           #ifdef JucePlugin_PreferredChannelConfigurations
            short configs[][2] = { JucePlugin_PreferredChannelConfigurations };

            if (! AudioProcessor::containsLayout (currentLayout, configs))
                return false;
           #endif

            bool foundValid = false;
            {
                auto onlyMains = currentLayout;

                for (int i = 1; i < numInputBuses; ++i)
                    onlyMains.inputBuses.getReference  (i) = AudioChannelSet::disabled();

                for (int i = 1; i < numOutputBuses; ++i)
                    onlyMains.outputBuses.getReference (i) = AudioChannelSet::disabled();

                if (p.checkBusesLayoutSupported (onlyMains))
                {
                    foundValid = true;
                    fullLayout = onlyMains;
                }
            }

            if (numInputBuses > 1)
            {
                // can the first bus be a sidechain or disabled, if not then we can't use this layout combination
                if (auto* bus = p.getBus (true, 1))
                    if (! bus->isLayoutSupported (AudioChannelSet::mono(), &currentLayout) && ! bus->isLayoutSupported (AudioChannelSet::disabled(), &currentLayout))
                        return foundValid;

                // can all the other inputs be disabled, if not then we can't use this layout combination
                for (int i = 2; i < numInputBuses; ++i)
                    if (auto* bus = p.getBus (true, i))
                        if (! bus->isLayoutSupported (AudioChannelSet::disabled(), &currentLayout))
                            return foundValid;

                if (auto* bus = p.getBus (true, 0))
                    if (! bus->isLayoutSupported (mainInput, &currentLayout))
                        return foundValid;

                if (auto* bus = p.getBus (false, 0))
                    if (! bus->isLayoutSupported (mainOutput, &currentLayout))
                        return foundValid;

                // recheck if the format is correct
                if ((numInputBuses  > 0 && currentLayout.inputBuses .getReference (0) != mainInput)
                 || (numOutputBuses > 0 && currentLayout.outputBuses.getReference (0) != mainOutput))
                    return foundValid;

                auto& sidechainBus = currentLayout.inputBuses.getReference (1);

                if (sidechainBus != AudioChannelSet::mono() && sidechainBus != AudioChannelSet::disabled())
                    return foundValid;

                for (int i = 2; i < numInputBuses; ++i)
                    if (currentLayout.outputBuses.getReference (i) != AudioChannelSet::disabled())
                        return foundValid;
            }

            const bool hasSidechain = (numInputBuses > 1 && currentLayout.inputBuses.getReference (1) == AudioChannelSet::mono());

            if (hasSidechain)
            {
                auto onlyMainsAndSidechain = currentLayout;

                for (int i = 1; i < numOutputBuses; ++i)
                    onlyMainsAndSidechain.outputBuses.getReference (i) = AudioChannelSet::disabled();

                if (p.checkBusesLayoutSupported (onlyMainsAndSidechain))
                {
                    foundValid = true;
                    fullLayout = onlyMainsAndSidechain;
                }
            }

            if (numOutputBuses > 1)
            {
                auto copy = currentLayout;
                int maxAuxBuses = jmin (16, numOutputBuses);

                for (int i = 1; i < maxAuxBuses; ++i)
                    copy.outputBuses.getReference (i) = mainOutput;

                for (int i = maxAuxBuses; i < numOutputBuses; ++i)
                    copy.outputBuses.getReference (i) = AudioChannelSet::disabled();

                if (p.checkBusesLayoutSupported (copy))
                {
                    fullLayout = copy;
                    foundValid = true;
                }
                else
                {
                    for (int i = 1; i < maxAuxBuses; ++i)
                        if (currentLayout.outputBuses.getReference (i).isDisabled())
                            return foundValid;

                    for (int i = maxAuxBuses; i < numOutputBuses; ++i)
                        if (auto* bus = p.getBus (false, i))
                            if (! bus->isLayoutSupported (AudioChannelSet::disabled(), &currentLayout))
                                return foundValid;

                    if (auto* bus = p.getBus (true, 0))
                        if (! bus->isLayoutSupported (mainInput, &currentLayout))
                            return foundValid;

                    if (auto* bus = p.getBus (false, 0))
                        if (! bus->isLayoutSupported (mainOutput, &currentLayout))
                            return foundValid;

                    if ((numInputBuses  > 0 && currentLayout.inputBuses .getReference (0) != mainInput)
                     || (numOutputBuses > 0 && currentLayout.outputBuses.getReference (0) != mainOutput))
                        return foundValid;

                    if (numInputBuses > 1)
                    {
                        auto& sidechainBus = currentLayout.inputBuses.getReference (1);

                        if (sidechainBus != AudioChannelSet::mono() && sidechainBus != AudioChannelSet::disabled())
                            return foundValid;
                    }

                    for (int i = maxAuxBuses; i < numOutputBuses; ++i)
                        if (! currentLayout.outputBuses.getReference (i).isDisabled())
                            return foundValid;

                    fullLayout = currentLayout;
                    foundValid = true;
                }
            }

            return foundValid;
        }

        bool isInAudioSuite()
        {
            AAX_CBoolean res;
            Controller()->GetIsAudioSuite (&res);

            return res > 0;
        }

    private:
        friend class JuceAAX_GUI;
        friend void AAX_CALLBACK AAXClasses::algorithmProcessCallback (JUCEAlgorithmContext* const instancesBegin[], const void* const instancesEnd);

        void process (float* const* channels, const int numChans, const int bufferSize,
                      const bool bypass, AAX_IMIDINode* midiNodeIn, AAX_IMIDINode* midiNodesOut)
        {
            AudioBuffer<float> buffer (channels, numChans, bufferSize);
            midiBuffer.clear();
            ignoreUnused (midiNodeIn, midiNodesOut);

           #if JucePlugin_WantsMidiInput || JucePlugin_IsMidiEffect
            {
                auto* midiStream = midiNodeIn->GetNodeBuffer();
                auto numMidiEvents = midiStream->mBufferSize;

                for (uint32_t i = 0; i < numMidiEvents; ++i)
                {
                    auto& m = midiStream->mBuffer[i];
                    jassert ((int) m.mTimestamp < bufferSize);

                    midiBuffer.addEvent (m.mData, (int) m.mLength,
                                         jlimit (0, (int) bufferSize - 1, (int) m.mTimestamp));
                }
            }
           #endif

            {
                if (lastBufferSize != bufferSize)
                {
                    lastBufferSize = bufferSize;
                    pluginInstance->setRateAndBufferSizeDetails (sampleRate, bufferSize);

                    if (bufferSize > maxBufferSize)
                    {
                        // we only call prepareToPlay here if the new buffer size is larger than
                        // the one used last time prepareToPlay was called.
                        // currently, this should never actually happen, because as of Pro Tools 12,
                        // the maximum possible value is 1024, and we call prepareToPlay with that
                        // value during initialisation.
                        pluginInstance->prepareToPlay (sampleRate, bufferSize);
                        maxBufferSize = bufferSize;
                        sideChainBuffer.calloc (static_cast<size_t> (maxBufferSize));
                    }
                }

                if (bypass)
                    pluginInstance->processBlockBypassed (buffer, midiBuffer);
                else
                    pluginInstance->processBlock (buffer, midiBuffer);
            }

           #if JucePlugin_ProducesMidiOutput || JucePlugin_IsMidiEffect
            {
                AAX_CMidiPacket packet;
                packet.mIsImmediate = false;

                for (const auto metadata : midiBuffer)
                {
                    jassert (isPositiveAndBelow (metadata.samplePosition, bufferSize));

                    if (metadata.numBytes <= 4)
                    {
                        packet.mTimestamp   = (uint32_t) metadata.samplePosition;
                        packet.mLength      = (uint32_t) metadata.numBytes;
                        memcpy (packet.mData, metadata.data, (size_t) metadata.numBytes);

                        check (midiNodesOut->PostMIDIPacket (&packet));
                    }
                }
            }
           #endif
        }

        bool isBypassPartOfRegularParemeters() const
        {
            auto& audioProcessor = getPluginInstance();

            int n = juceParameters.getNumParameters();

            if (auto* bypassParam = audioProcessor.getBypassParameter())
                for (int i = 0; i < n; ++i)
                    if (juceParameters.getParamForIndex (i) == bypassParam)
                        return true;

            return false;
        }

        // Some older Pro Tools control surfaces (EUCON [PT version 12.4] and
        // Avid S6 before version 2.1) cannot cope with a large number of
        // parameter steps.
        static int32_t getSafeNumberOfParameterSteps (const AudioProcessorParameter& param)
        {
            return jmin (param.getNumSteps(), 2048);
        }

        void addAudioProcessorParameters()
        {
            auto& audioProcessor = getPluginInstance();

           #if JUCE_FORCE_USE_LEGACY_PARAM_IDS
            const bool forceLegacyParamIDs = true;
           #else
            const bool forceLegacyParamIDs = false;
           #endif

            auto bypassPartOfRegularParams = isBypassPartOfRegularParemeters();

            juceParameters.update (audioProcessor, forceLegacyParamIDs);

            auto* bypassParameter = pluginInstance->getBypassParameter();

            if (bypassParameter == nullptr)
            {
                ownedBypassParameter.reset (new AudioParameterBool (cDefaultMasterBypassID, "Master Bypass", false, {}, {}, {}));
                bypassParameter = ownedBypassParameter.get();
            }

            if (! bypassPartOfRegularParams)
                juceParameters.params.add (bypassParameter);

            int parameterIndex = 0;

            for (auto* juceParam : juceParameters.params)
            {
                auto isBypassParameter = (juceParam == bypassParameter);

                auto category = juceParam->getCategory();
                auto paramID  = isBypassParameter ? String (cDefaultMasterBypassID)
                                                  : juceParameters.getParamID (audioProcessor, parameterIndex);

                aaxParamIDs.add (paramID);
                auto* aaxParamID = aaxParamIDs.getReference (parameterIndex++).toRawUTF8();

                paramMap.set (AAXClasses::getAAXParamHash (aaxParamID), juceParam);

                // is this a meter?
                if (((category & 0xffff0000) >> 16) == 2)
                {
                    aaxMeters.add (juceParam);
                    continue;
                }

                auto parameter = new AAX_CParameter<float> (aaxParamID,
                                                            AAX_CString (juceParam->getName (31).toRawUTF8()),
                                                            juceParam->getDefaultValue(),
                                                            AAX_CLinearTaperDelegate<float, 0>(),
                                                            AAX_CNumberDisplayDelegate<float, 3>(),
                                                            juceParam->isAutomatable());

                parameter->AddShortenedName (juceParam->getName (4).toRawUTF8());

                auto parameterNumSteps = getSafeNumberOfParameterSteps (*juceParam);
                parameter->SetNumberOfSteps ((uint32_t) parameterNumSteps);

               #if JUCE_FORCE_LEGACY_PARAMETER_AUTOMATION_TYPE
                parameter->SetType (parameterNumSteps > 1000 ? AAX_eParameterType_Continuous
                                                             : AAX_eParameterType_Discrete);
               #else
                parameter->SetType (juceParam->isDiscrete() ? AAX_eParameterType_Discrete
                                                            : AAX_eParameterType_Continuous);
               #endif

                parameter->SetOrientation (juceParam->isOrientationInverted()
                                            ? (AAX_eParameterOrientation_RightMinLeftMax | AAX_eParameterOrientation_TopMinBottomMax
                                                | AAX_eParameterOrientation_RotarySingleDotMode | AAX_eParameterOrientation_RotaryRightMinLeftMax)
                                            : (AAX_eParameterOrientation_LeftMinRightMax | AAX_eParameterOrientation_BottomMinTopMax
                                                | AAX_eParameterOrientation_RotarySingleDotMode | AAX_eParameterOrientation_RotaryLeftMinRightMax));

                mParameterManager.AddParameter (parameter);

                if (isBypassParameter)
                    mPacketDispatcher.RegisterPacket (aaxParamID, JUCEAlgorithmIDs::bypass);
            }
        }

        bool getMainBusFormats (AudioChannelSet& inputSet, AudioChannelSet& outputSet)
        {
            auto& audioProcessor = getPluginInstance();

           #if JucePlugin_IsMidiEffect
            // MIDI effect plug-ins do not support any audio channels
            jassert (audioProcessor.getTotalNumInputChannels()  == 0
                  && audioProcessor.getTotalNumOutputChannels() == 0);

            inputSet = outputSet = AudioChannelSet();
            return true;
           #else
            auto inputBuses  = audioProcessor.getBusCount (true);
            auto outputBuses = audioProcessor.getBusCount (false);

            AAX_EStemFormat inputStemFormat = AAX_eStemFormat_None;
            check (Controller()->GetInputStemFormat (&inputStemFormat));

            AAX_EStemFormat outputStemFormat = AAX_eStemFormat_None;
            check (Controller()->GetOutputStemFormat (&outputStemFormat));

            #if JucePlugin_IsSynth
             if (inputBuses == 0)
                 inputStemFormat = AAX_eStemFormat_None;
            #endif

            inputSet  = (inputBuses  > 0 ? channelSetFromStemFormat (inputStemFormat,  false) : AudioChannelSet());
            outputSet = (outputBuses > 0 ? channelSetFromStemFormat (outputStemFormat, false) : AudioChannelSet());

            if ((inputSet == AudioChannelSet::disabled() && inputStemFormat != AAX_eStemFormat_None) || (outputSet == AudioChannelSet::disabled() && outputStemFormat != AAX_eStemFormat_None)
                || (inputSet != AudioChannelSet::disabled() && inputBuses == 0) || (outputSet != AudioChannelSet::disabled() && outputBuses == 0))
                return false;

            return true;
           #endif
        }

        AAX_Result preparePlugin()
        {
            auto& audioProcessor = getPluginInstance();
            auto oldLayout = audioProcessor.getBusesLayout();
            AudioChannelSet inputSet, outputSet;

            if (! getMainBusFormats (inputSet, outputSet))
            {
                if (isPrepared)
                {
                    isPrepared = false;
                    audioProcessor.releaseResources();
                }

                return AAX_ERROR_UNIMPLEMENTED;
            }

            AudioProcessor::BusesLayout newLayout;

            if (! fullBusesLayoutFromMainLayout (audioProcessor, inputSet, outputSet, newLayout))
            {
                if (isPrepared)
                {
                    isPrepared = false;
                    audioProcessor.releaseResources();
                }

                return AAX_ERROR_UNIMPLEMENTED;
            }

            hasSidechain = (newLayout.getNumChannels (true, 1) == 1);

            if (hasSidechain)
            {
                sidechainDesired = true;

                auto disabledSidechainLayout = newLayout;
                disabledSidechainLayout.inputBuses.getReference (1) = AudioChannelSet::disabled();

                canDisableSidechain = audioProcessor.checkBusesLayoutSupported (disabledSidechainLayout);

                if (canDisableSidechain && ! lastSideChainState)
                {
                    sidechainDesired = false;
                    newLayout = disabledSidechainLayout;
                }
            }

            if (isInAudioSuite())
            {
                // AudioSuite doesn't support multiple output buses
                for (int i = 1; i < newLayout.outputBuses.size(); ++i)
                    newLayout.outputBuses.getReference (i) = AudioChannelSet::disabled();

                if (! audioProcessor.checkBusesLayoutSupported (newLayout))
                {
                    // your plug-in needs to support a single output bus if running in AudioSuite
                    jassertfalse;

                    if (isPrepared)
                    {
                        isPrepared = false;
                        audioProcessor.releaseResources();
                    }

                    return AAX_ERROR_UNIMPLEMENTED;
                }
            }

            const bool layoutChanged = (oldLayout != newLayout);

            if (layoutChanged)
            {
                if (! audioProcessor.setBusesLayout (newLayout))
                {
                    if (isPrepared)
                    {
                        isPrepared = false;
                        audioProcessor.releaseResources();
                    }

                    return AAX_ERROR_UNIMPLEMENTED;
                }

                rebuildChannelMapArrays();
            }

            if (layoutChanged || (! isPrepared))
            {
                if (isPrepared)
                {
                    isPrepared = false;
                    audioProcessor.releaseResources();
                }

                audioProcessor.setRateAndBufferSizeDetails (sampleRate, lastBufferSize);
                audioProcessor.prepareToPlay (sampleRate, lastBufferSize);
                maxBufferSize = lastBufferSize;

                midiBuffer.ensureSize (2048);
                midiBuffer.clear();

                sideChainBuffer.calloc (static_cast<size_t> (maxBufferSize));
            }

            check (Controller()->SetSignalLatency (audioProcessor.getLatencySamples()));
            isPrepared = true;

            return AAX_SUCCESS;
        }

        void rebuildChannelMapArrays()
        {
            auto& audioProcessor = getPluginInstance();

            for (int dir = 0; dir < 2; ++dir)
            {
                bool isInput = (dir == 0);
                auto& layoutMap = isInput ? inputLayoutMap : outputLayoutMap;
                layoutMap.clear();

                auto numBuses = audioProcessor.getBusCount (isInput);
                int chOffset = 0;

                for (int busIdx = 0; busIdx < numBuses; ++busIdx)
                {
                    auto channelFormat = audioProcessor.getChannelLayoutOfBus (isInput, busIdx);

                    if (channelFormat != AudioChannelSet::disabled())
                    {
                        auto numChannels = channelFormat.size();

                        for (int ch = 0; ch < numChannels; ++ch)
                            layoutMap.add (juceChannelIndexToAax (ch, channelFormat) + chOffset);

                        chOffset += numChannels;
                    }
                }
            }
        }

        static void algorithmCallback (JUCEAlgorithmContext* const instancesBegin[], const void* const instancesEnd)
        {
            for (auto iter = instancesBegin; iter < instancesEnd; ++iter)
            {
                auto& i = **iter;

                int sideChainBufferIdx = i.pluginInstance->parameters.hasSidechain && i.sideChainBuffers != nullptr
                                             ? static_cast<int> (*i.sideChainBuffers) : -1;

                // sidechain index of zero is an invalid index
                if (sideChainBufferIdx <= 0)
                    sideChainBufferIdx = -1;

                auto numMeters = i.pluginInstance->parameters.aaxMeters.size();
                float* const meterTapBuffers = (i.meterTapBuffers != nullptr && numMeters > 0 ? *i.meterTapBuffers : nullptr);

                i.pluginInstance->parameters.process (i.inputChannels, i.outputChannels, sideChainBufferIdx,
                                                      *(i.bufferSize), *(i.bypass) != 0,
                                                      getMidiNodeIn(i), getMidiNodeOut(i),
                                                      meterTapBuffers);
            }
        }

        //==============================================================================
        void updateSidechainState()
        {
            if (! processingSidechainChange)
                return;

            auto& audioProcessor = getPluginInstance();
            bool sidechainActual = audioProcessor.getChannelCountOfBus (true, 1) > 0;

            if (hasSidechain && canDisableSidechain && sidechainDesired != sidechainActual)
            {
                lastSideChainState = sidechainDesired;

                if (isPrepared)
                {
                    isPrepared = false;
                    audioProcessor.releaseResources();
                }

                if (auto* bus = audioProcessor.getBus (true, 1))
                    bus->setCurrentLayout (lastSideChainState ? AudioChannelSet::mono()
                                                              : AudioChannelSet::disabled());

                audioProcessor.prepareToPlay (audioProcessor.getSampleRate(), audioProcessor.getBlockSize());
                isPrepared = true;
            }

            processingSidechainChange = false;
        }

        void handleAsyncUpdate() override
        {
            updateSidechainState();
        }

        //==============================================================================
        static AudioProcessor::CurveData::Type aaxCurveTypeToJUCE (AAX_CTypeID type) noexcept
        {
            switch (type)
            {
            case AAX_eCurveType_EQ:              return AudioProcessor::CurveData::Type::EQ;
            case AAX_eCurveType_Dynamics:        return AudioProcessor::CurveData::Type::Dynamics;
            case AAX_eCurveType_Reduction:       return AudioProcessor::CurveData::Type::GainReduction;
            default:  break;
            }

            return AudioProcessor::CurveData::Type::Unknown;
        }

        uint32_t getAAXMeterIdForParamId (const String& paramID) const noexcept
        {
            int idx;

            for (idx = 0; idx < aaxMeters.size(); ++idx)
                if (LegacyAudioParameter::getParamID (aaxMeters[idx], false) == paramID)
                    break;

            // you specified a parameter id in your curve but the parameter does not have the meter
            // category
            jassert (idx < aaxMeters.size());
            return 'Metr' + static_cast<AAX_CTypeID> (idx);
        }

        //==============================================================================
        AAX_Result GetCurveData (AAX_CTypeID iCurveType, const float * iValues, uint32_t iNumValues, float * oValues ) const override
        {
            auto curveType = aaxCurveTypeToJUCE (iCurveType);

            if (curveType != AudioProcessor::CurveData::Type::Unknown)
            {
                auto& audioProcessor = getPluginInstance();
                auto curve = audioProcessor.getResponseCurve (curveType);

                if (curve.curve)
                {
                    if (oValues != nullptr && iValues != nullptr)
                    {
                        for (uint32_t i = 0; i < iNumValues; ++i)
                            oValues[i] = curve.curve (iValues[i]);
                    }

                    return AAX_SUCCESS;
                }
            }

            return AAX_ERROR_UNIMPLEMENTED;
        }

        AAX_Result GetCurveDataMeterIds (AAX_CTypeID iCurveType, uint32_t *oXMeterId, uint32_t *oYMeterId)  const override
        {
            auto curveType = aaxCurveTypeToJUCE (iCurveType);

            if (curveType != AudioProcessor::CurveData::Type::Unknown)
            {
                auto& audioProcessor = getPluginInstance();
                auto curve = audioProcessor.getResponseCurve (curveType);

                if (curve.curve && curve.xMeterID.isNotEmpty() && curve.yMeterID.isNotEmpty())
                {
                    if (oXMeterId != nullptr) *oXMeterId = getAAXMeterIdForParamId (curve.xMeterID);
                    if (oYMeterId != nullptr) *oYMeterId = getAAXMeterIdForParamId (curve.yMeterID);

                    return AAX_SUCCESS;
                }
            }

            return AAX_ERROR_UNIMPLEMENTED;
        }

        AAX_Result GetCurveDataDisplayRange (AAX_CTypeID iCurveType, float *oXMin, float *oXMax, float *oYMin, float *oYMax) const override
        {
            auto curveType = aaxCurveTypeToJUCE (iCurveType);

            if (curveType != AudioProcessor::CurveData::Type::Unknown)
            {
                auto& audioProcessor = getPluginInstance();
                auto curve = audioProcessor.getResponseCurve (curveType);

                if (curve.curve)
                {
                    if (oXMin != nullptr) *oXMin = curve.xRange.getStart();
                    if (oXMax != nullptr) *oXMax = curve.xRange.getEnd();
                    if (oYMin != nullptr) *oYMin = curve.yRange.getStart();
                    if (oYMax != nullptr) *oYMax = curve.yRange.getEnd();

                    return AAX_SUCCESS;
                }
            }

            return AAX_ERROR_UNIMPLEMENTED;
        }

        //==============================================================================
        inline int getParamIndexFromID (AAX_CParamID paramID) const noexcept
        {
            if (auto* param = getParameterFromID (paramID))
                return LegacyAudioParameter::getParamIndex (getPluginInstance(), param);

            return -1;
        }

        inline AAX_CParamID getAAXParamIDFromJuceIndex (int index) const noexcept
        {
            if (isPositiveAndBelow (index, aaxParamIDs.size()))
                return aaxParamIDs.getReference (index).toRawUTF8();

            return nullptr;
        }

        AudioProcessorParameter* getParameterFromID (AAX_CParamID paramID) const noexcept
        {
            return paramMap [AAXClasses::getAAXParamHash (paramID)];
        }

        //==============================================================================
        static AudioProcessor::BusesLayout getDefaultLayout (const AudioProcessor& p, bool enableAll)
        {
            AudioProcessor::BusesLayout defaultLayout;

            for (int dir = 0; dir < 2; ++dir)
            {
                bool isInput = (dir == 0);
                auto numBuses = p.getBusCount (isInput);
                auto& layouts = (isInput ? defaultLayout.inputBuses : defaultLayout.outputBuses);

                for (int i = 0; i < numBuses; ++i)
                    if (auto* bus = p.getBus (isInput, i))
                        layouts.add (enableAll || bus->isEnabledByDefault() ? bus->getDefaultLayout() : AudioChannelSet());
            }

            return defaultLayout;
        }

        static AudioProcessor::BusesLayout getDefaultLayout (AudioProcessor& p)
        {
            auto defaultLayout = getDefaultLayout (p, true);

            if (! p.checkBusesLayoutSupported (defaultLayout))
                defaultLayout = getDefaultLayout (p, false);

            // Your processor must support the default layout
            jassert (p.checkBusesLayoutSupported (defaultLayout));
            return defaultLayout;
        }

        //==============================================================================
        ScopedJuceInitialiser_GUI libraryInitialiser;

        std::unique_ptr<AudioProcessor> pluginInstance;

        bool isPrepared = false;
        MidiBuffer midiBuffer;
        Array<float*> channelList;
        int32_t juceChunkIndex = 0;
        AAX_CSampleRate sampleRate = 0;
        int lastBufferSize = 1024, maxBufferSize = 1024;
        bool hasSidechain = false, canDisableSidechain = false, lastSideChainState = false;

        std::atomic<bool> processingSidechainChange, sidechainDesired;

        HeapBlock<float> sideChainBuffer;
        Array<int> inputLayoutMap, outputLayoutMap;

        Array<String> aaxParamIDs;
        HashMap<int32, AudioProcessorParameter*> paramMap;
        LegacyAudioParametersWrapper juceParameters;
        std::unique_ptr<AudioProcessorParameter> ownedBypassParameter;

        Array<AudioProcessorParameter*> aaxMeters;

        struct ChunkMemoryBlock
        {
            juce::MemoryBlock data;
            bool isValid;
        };

        // temporary filter data is generated in GetChunkSize
        // and the size of the data returned. To avoid generating
        // it again in GetChunk, we need to store it somewhere.
        // However, as GetChunkSize and GetChunk can be called
        // on different threads, we store it in thread dependent storage
        // in a hash map with the thread id as a key.
        mutable ThreadLocalValue<ChunkMemoryBlock> perThreadFilterData;
        CriticalSection perThreadDataLock;

        ThreadLocalValue<bool> inParameterChangedCallback;

        JUCE_DECLARE_NON_COPYABLE (JuceAAX_Processor)
    };

    //==============================================================================
    void JuceAAX_GUI::CreateViewContents()
    {
        if (component == nullptr)
        {
            if (auto* params = dynamic_cast<JuceAAX_Processor*> (GetEffectParameters()))
                component.reset (new ContentWrapperComponent (*this, params->getPluginInstance()));
            else
                jassertfalse;
        }
    }

    int JuceAAX_GUI::getParamIndexFromID (AAX_CParamID paramID) const noexcept
    {
        if (auto* params = dynamic_cast<const JuceAAX_Processor*> (GetEffectParameters()))
            return params->getParamIndexFromID (paramID);

        return -1;
    }

    AAX_CParamID JuceAAX_GUI::getAAXParamIDFromJuceIndex (int index) const noexcept
    {
        if (auto* params = dynamic_cast<const JuceAAX_Processor*> (GetEffectParameters()))
            return params->getAAXParamIDFromJuceIndex (index);

        return nullptr;
    }

    //==============================================================================
    struct AAXFormatConfiguration
    {
        AAXFormatConfiguration() noexcept {}

        AAXFormatConfiguration (AAX_EStemFormat inFormat, AAX_EStemFormat outFormat) noexcept
            : inputFormat (inFormat), outputFormat (outFormat) {}

        AAX_EStemFormat inputFormat  = AAX_eStemFormat_None,
                        outputFormat = AAX_eStemFormat_None;

        bool operator== (const AAXFormatConfiguration other) const noexcept
        {
            return inputFormat == other.inputFormat && outputFormat == other.outputFormat;
        }

        bool operator< (const AAXFormatConfiguration other) const noexcept
        {
            return inputFormat == other.inputFormat ? (outputFormat < other.outputFormat)
                                                    : (inputFormat  < other.inputFormat);
        }
    };

    //==============================================================================
    static int addAAXMeters (AudioProcessor& p, AAX_IEffectDescriptor& descriptor)
    {
        LegacyAudioParametersWrapper params;

       #if JUCE_FORCE_USE_LEGACY_PARAM_IDS
        const bool forceLegacyParamIDs = true;
       #else
        const bool forceLegacyParamIDs = false;
       #endif

        params.update (p, forceLegacyParamIDs);

        int meterIdx = 0;

        for (auto* param : params.params)
        {
            auto category = param->getCategory();

            // is this a meter?
            if (((category & 0xffff0000) >> 16) == 2)
            {
                if (auto* meterProperties = descriptor.NewPropertyMap())
                {
                    meterProperties->AddProperty (AAX_eProperty_Meter_Type,        getMeterTypeForCategory (category));
                    meterProperties->AddProperty (AAX_eProperty_Meter_Orientation, AAX_eMeterOrientation_TopRight);

                    descriptor.AddMeterDescription ('Metr' + static_cast<AAX_CTypeID> (meterIdx++),
                                                    param->getName (1024).toRawUTF8(), meterProperties);
                }
            }
        }

        return meterIdx;
    }

    static void createDescriptor (AAX_IComponentDescriptor& desc,
                                  const AudioProcessor::BusesLayout& fullLayout,
                                  AudioProcessor& processor,
                                  Array<int32>& pluginIds,
                                  const int numMeters)
    {
        auto aaxInputFormat  = getFormatForAudioChannelSet (fullLayout.getMainInputChannelSet(),  false);
        auto aaxOutputFormat = getFormatForAudioChannelSet (fullLayout.getMainOutputChannelSet(), false);

       #if JucePlugin_IsSynth
        if (aaxInputFormat == AAX_eStemFormat_None)
            aaxInputFormat = aaxOutputFormat;
       #endif

       #if JucePlugin_IsMidiEffect
        aaxInputFormat = aaxOutputFormat = AAX_eStemFormat_Mono;
       #endif

        check (desc.AddAudioIn  (JUCEAlgorithmIDs::inputChannels));
        check (desc.AddAudioOut (JUCEAlgorithmIDs::outputChannels));

        check (desc.AddAudioBufferLength (JUCEAlgorithmIDs::bufferSize));
        check (desc.AddDataInPort (JUCEAlgorithmIDs::bypass, sizeof (int32_t)));

       #if JucePlugin_WantsMidiInput || JucePlugin_IsMidiEffect
        check (desc.AddMIDINode (JUCEAlgorithmIDs::midiNodeIn, AAX_eMIDINodeType_LocalInput,
                                 JucePlugin_Name, 0xffff));
       #endif

       #if JucePlugin_ProducesMidiOutput || JucePlugin_IsSynth || JucePlugin_IsMidiEffect
        check (desc.AddMIDINode (JUCEAlgorithmIDs::midiNodeOut, AAX_eMIDINodeType_LocalOutput,
                                 JucePlugin_Name " Out", 0xffff));
       #endif

        check (desc.AddPrivateData (JUCEAlgorithmIDs::pluginInstance, sizeof (PluginInstanceInfo)));
        check (desc.AddPrivateData (JUCEAlgorithmIDs::preparedFlag, sizeof (int32_t)));

        if (numMeters > 0)
        {
            HeapBlock<AAX_CTypeID> meterIDs (static_cast<size_t> (numMeters));

            for (int i = 0; i < numMeters; ++i)
                meterIDs[i] = 'Metr' + static_cast<AAX_CTypeID> (i);

            check (desc.AddMeters (JUCEAlgorithmIDs::meterTapBuffers, meterIDs.getData(), static_cast<uint32_t> (numMeters)));
        }
        else
        {
            // AAX does not allow there to be any gaps in the fields of the algorithm context structure
            // so just add a dummy one here if there aren't any meters
            check (desc.AddPrivateData (JUCEAlgorithmIDs::meterTapBuffers, sizeof (uintptr_t)));
        }

        // Create a property map
        AAX_IPropertyMap* const properties = desc.NewPropertyMap();
        jassert (properties != nullptr);

        properties->AddProperty (AAX_eProperty_ManufacturerID,      JucePlugin_AAXManufacturerCode);
        properties->AddProperty (AAX_eProperty_ProductID,           JucePlugin_AAXProductId);

       #if JucePlugin_AAXDisableBypass
        properties->AddProperty (AAX_eProperty_CanBypass,           false);
       #else
        properties->AddProperty (AAX_eProperty_CanBypass,           true);
       #endif

        properties->AddProperty (AAX_eProperty_InputStemFormat,     static_cast<AAX_CPropertyValue> (aaxInputFormat));
        properties->AddProperty (AAX_eProperty_OutputStemFormat,    static_cast<AAX_CPropertyValue> (aaxOutputFormat));

        // This value needs to match the RTAS wrapper's Type ID, so that
        // the host knows that the RTAS/AAX plugins are equivalent.
        const int32 pluginID = processor.getAAXPluginIDForMainBusConfig (fullLayout.getMainInputChannelSet(),
                                                                         fullLayout.getMainOutputChannelSet(),
                                                                         false);

        // The plugin id generated from your AudioProcessor's getAAXPluginIDForMainBusConfig callback
        // it not unique. Please fix your implementation!
        jassert (! pluginIds.contains (pluginID));
        pluginIds.add (pluginID);

        properties->AddProperty (AAX_eProperty_PlugInID_Native, pluginID);

       #if ! JucePlugin_AAXDisableAudioSuite
        properties->AddProperty (AAX_eProperty_PlugInID_AudioSuite,
                                 processor.getAAXPluginIDForMainBusConfig (fullLayout.getMainInputChannelSet(),
                                                                           fullLayout.getMainOutputChannelSet(),
                                                                           true));
       #endif

       #if JucePlugin_AAXDisableMultiMono
        properties->AddProperty (AAX_eProperty_Constraint_MultiMonoSupport, false);
       #else
        properties->AddProperty (AAX_eProperty_Constraint_MultiMonoSupport, true);
       #endif

       #if JucePlugin_AAXDisableDynamicProcessing
        properties->AddProperty (AAX_eProperty_Constraint_AlwaysProcess, true);
       #endif

       #if JucePlugin_AAXDisableSaveRestore
        properties->AddProperty (AAX_eProperty_SupportsSaveRestore, false);
       #endif

        if (fullLayout.getChannelSet (true, 1) == AudioChannelSet::mono())
        {
            check (desc.AddSideChainIn (JUCEAlgorithmIDs::sideChainBuffers));
            properties->AddProperty (AAX_eProperty_SupportsSideChainInput, true);
        }
        else
        {
            // AAX does not allow there to be any gaps in the fields of the algorithm context structure
            // so just add a dummy one here if there aren't any side chains
            check (desc.AddPrivateData (JUCEAlgorithmIDs::sideChainBuffers, sizeof (uintptr_t)));
        }

        auto maxAuxBuses = jmax (0, jmin (15, fullLayout.outputBuses.size() - 1));

        // add the output buses
        // This is incredibly dumb: the output bus format must be well defined
        // for every main bus in/out format pair. This means that there cannot
        // be two configurations with different aux formats but
        // identical main bus in/out formats.
        for (int busIdx = 1; busIdx < maxAuxBuses + 1; ++busIdx)
        {
            auto set = fullLayout.getChannelSet (false, busIdx);

            if (set.isDisabled())
                break;

            auto auxFormat = getFormatForAudioChannelSet (set, true);

            if (auxFormat != AAX_eStemFormat_INT32_MAX && auxFormat != AAX_eStemFormat_None)
            {
                auto& name = processor.getBus (false, busIdx)->getName();
                check (desc.AddAuxOutputStem (0, static_cast<int32_t> (auxFormat), name.toRawUTF8()));
            }
        }

        check (desc.AddProcessProc_Native (algorithmProcessCallback, properties));
    }

    static bool hostSupportsStemFormat (AAX_EStemFormat stemFormat, const AAX_IFeatureInfo* featureInfo)
    {
        if (featureInfo != nullptr)
        {
            AAX_ESupportLevel supportLevel;

            if (featureInfo->SupportLevel (supportLevel) == AAX_SUCCESS && supportLevel == AAX_eSupportLevel_ByProperty)
            {
                std::unique_ptr<const AAX_IPropertyMap> props (featureInfo->AcquireProperties());

                // Due to a bug in ProTools 12.8, ProTools thinks that AAX_eStemFormat_Ambi_1_ACN is not supported
                // To workaround this bug, check if ProTools supports AAX_eStemFormat_Ambi_2_ACN, and, if yes,
                // we can safely assume that it will also support AAX_eStemFormat_Ambi_1_ACN
                if (stemFormat == AAX_eStemFormat_Ambi_1_ACN)
                    stemFormat = AAX_eStemFormat_Ambi_2_ACN;

                if (props != nullptr && props->GetProperty ((AAX_EProperty) stemFormat, (AAX_CPropertyValue*) &supportLevel) != 0)
                    return (supportLevel == AAX_eSupportLevel_Supported);
            }
        }

        return (AAX_STEM_FORMAT_INDEX (stemFormat) <= 12);
    }

    static void getPlugInDescription (AAX_IEffectDescriptor& descriptor, const AAX_IFeatureInfo* featureInfo)
    {
        PluginHostType::jucePlugInClientCurrentWrapperType = AudioProcessor::wrapperType_AAX;
        std::unique_ptr<AudioProcessor> plugin (createPluginFilterOfType (AudioProcessor::wrapperType_AAX));
        auto numInputBuses  = plugin->getBusCount (true);
        auto numOutputBuses = plugin->getBusCount (false);

        auto pluginNames = plugin->getAlternateDisplayNames();

        pluginNames.insert (0, JucePlugin_Desc);
        pluginNames.insert (0, JucePlugin_Name);

        pluginNames.removeDuplicates (false);

        for (auto name : pluginNames)
            descriptor.AddName (name.toRawUTF8());

        descriptor.AddCategory (JucePlugin_AAXCategory);

        const int numMeters = addAAXMeters (*plugin, descriptor);

       #ifdef JucePlugin_AAXPageTableFile
        // optional page table setting - define this macro in your project if you want
        // to set this value - see Avid documentation for details about its format.
        descriptor.AddResourceInfo (AAX_eResourceType_PageTable, JucePlugin_AAXPageTableFile);
       #endif

        check (descriptor.AddProcPtr ((void*) JuceAAX_GUI::Create,        kAAX_ProcPtrID_Create_EffectGUI));
        check (descriptor.AddProcPtr ((void*) JuceAAX_Processor::Create,  kAAX_ProcPtrID_Create_EffectParameters));

        Array<int32> pluginIds;
       #if JucePlugin_IsMidiEffect
        // MIDI effect plug-ins do not support any audio channels
        jassert (numInputBuses == 0 && numOutputBuses == 0);
        ignoreUnused (featureInfo);

        if (auto* desc = descriptor.NewComponentDescriptor())
        {
            createDescriptor (*desc, plugin->getBusesLayout(), *plugin, pluginIds, numMeters);
            check (descriptor.AddComponent (desc));
        }
       #else
        const int numIns  = numInputBuses  > 0 ? numElementsInArray (aaxFormats) : 0;
        const int numOuts = numOutputBuses > 0 ? numElementsInArray (aaxFormats) : 0;

        for (int inIdx = 0; inIdx < jmax (numIns, 1); ++inIdx)
        {
            auto aaxInFormat = numIns > 0 ? aaxFormats[inIdx] : AAX_eStemFormat_None;
            auto inLayout = channelSetFromStemFormat (aaxInFormat, false);

            for (int outIdx = 0; outIdx < jmax (numOuts, 1); ++outIdx)
            {
                auto aaxOutFormat = numOuts > 0 ? aaxFormats[outIdx] : AAX_eStemFormat_None;
                auto outLayout = channelSetFromStemFormat (aaxOutFormat, false);

                if (hostSupportsStemFormat (aaxInFormat, featureInfo)
                     && hostSupportsStemFormat (aaxOutFormat, featureInfo))
                {
                    AudioProcessor::BusesLayout fullLayout;

                    if (! JuceAAX_Processor::fullBusesLayoutFromMainLayout (*plugin, inLayout, outLayout, fullLayout))
                        continue;

                    if (auto* desc = descriptor.NewComponentDescriptor())
                    {
                        createDescriptor (*desc, fullLayout, *plugin, pluginIds, numMeters);
                        check (descriptor.AddComponent (desc));
                    }
                }
            }
        }

        // You don't have any supported layouts
        jassert (pluginIds.size() > 0);
       #endif
    }
}

void AAX_CALLBACK AAXClasses::algorithmProcessCallback (JUCEAlgorithmContext* const instancesBegin[], const void* const instancesEnd)
{
    AAXClasses::JuceAAX_Processor::algorithmCallback (instancesBegin, instancesEnd);
}

//==============================================================================
AAX_Result JUCE_CDECL GetEffectDescriptions (AAX_ICollection*);
AAX_Result JUCE_CDECL GetEffectDescriptions (AAX_ICollection* collection)
{
    ScopedJuceInitialiser_GUI libraryInitialiser;

    std::unique_ptr<const AAX_IFeatureInfo> stemFormatFeatureInfo;

    if (const auto* hostDescription = collection->DescriptionHost())
        stemFormatFeatureInfo.reset (hostDescription->AcquireFeatureProperties (AAXATTR_ClientFeature_StemFormat));

    if (auto* descriptor = collection->NewDescriptor())
    {
        AAXClasses::getPlugInDescription (*descriptor, stemFormatFeatureInfo.get());
        collection->AddEffect (JUCE_STRINGIFY (JucePlugin_AAXIdentifier), descriptor);

        collection->SetManufacturerName (JucePlugin_Manufacturer);
        collection->AddPackageName (JucePlugin_Desc);
        collection->AddPackageName (JucePlugin_Name);
        collection->SetPackageVersion (JucePlugin_VersionCode);

        return AAX_SUCCESS;
    }

    return AAX_ERROR_NULL_OBJECT;
}

//==============================================================================
#if _MSC_VER || JUCE_MINGW
extern "C" BOOL WINAPI DllMain (HINSTANCE instance, DWORD reason, LPVOID) { if (reason == DLL_PROCESS_ATTACH) Process::setCurrentModuleInstanceHandle (instance); return true; }
#endif

#endif