Carla/source/backend/engine/CarlaEngineNative.cpp

/*
 * Carla Plugin Host
 * Copyright (C) 2011-2022 Filipe Coelho <falktx@falktx.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * For a full copy of the GNU General Public License see the doc/GPL.txt file.
 */

#include "CarlaDefines.h"

#ifdef BUILD_BRIDGE_ALTERNATIVE_ARCH
# error This file should not be compiled if building alternative-arch bridges
#endif

#include "CarlaEngineInit.hpp"
#include "CarlaEngineInternal.hpp"
#include "CarlaPlugin.hpp"

#include "CarlaBackendUtils.hpp"
#include "CarlaBase64Utils.hpp"
#include "CarlaBinaryUtils.hpp"
#include "CarlaMathUtils.hpp"
#include "CarlaStateUtils.hpp"

#include "CarlaExternalUI.hpp"
#include "CarlaHost.h"
#include "CarlaNative.hpp"
#include "CarlaNativePlugin.h"

#if defined(USING_JUCE) && ! (defined(CARLA_OS_MAC) || defined(CARLA_OS_WIN))
# if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
#  pragma GCC diagnostic push
#  pragma GCC diagnostic ignored "-Wconversion"
#  pragma GCC diagnostic ignored "-Weffc++"
#  pragma GCC diagnostic ignored "-Wsign-conversion"
#  pragma GCC diagnostic ignored "-Wundef"
#  pragma GCC diagnostic ignored "-Wzero-as-null-pointer-constant"
# endif
# include "AppConfig.h"
# include "juce_events/juce_events.h"
# define USE_REFCOUNTER_JUCE_MESSAGE_MANAGER
# if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
#  pragma GCC diagnostic pop
# endif
#endif

#include "water/files/File.h"
#include "water/streams/MemoryOutputStream.h"
#include "water/xml/XmlDocument.h"
#include "water/xml/XmlElement.h"

using water::File;
using water::MemoryOutputStream;
using water::String;
using water::XmlDocument;
using water::XmlElement;

CARLA_BACKEND_START_NAMESPACE

static const uint32_t kNumInParams = 100;
static const uint32_t kNumOutParams = 10;

static const uint16_t kUiWidth = 1024;
static const uint16_t kUiHeight = 712;

// -----------------------------------------------------------------------

#ifdef USE_REFCOUNTER_JUCE_MESSAGE_MANAGER
static int numScopedInitInstances = 0;

struct ReferenceCountedJuceMessageMessager
{
    ReferenceCountedJuceMessageMessager()
    {
        CARLA_SAFE_ASSERT(numScopedInitInstances == 0);
    }

    ~ReferenceCountedJuceMessageMessager()
    {
        CARLA_SAFE_ASSERT(numScopedInitInstances == 0);
    }

    void incRef()
    {
        if (numScopedInitInstances++ == 0)
        {
            juce::initialiseJuce_GUI();
            juce::MessageManager::getInstance()->setCurrentThreadAsMessageThread();
        }
    }

    void decRef()
    {
        if (--numScopedInitInstances == 0)
        {
            juce::shutdownJuce_GUI();
        }
    }
};
#endif

// -----------------------------------------------------------------------

class CarlaEngineNative;

class CarlaEngineNativeUI : public CarlaExternalUI
{
public:
    CarlaEngineNativeUI(CarlaEngineNative* const engine)
        : fEngine(engine)
    {
        carla_debug("CarlaEngineNativeUI::CarlaEngineNativeUI(%p)", engine);
    }

    ~CarlaEngineNativeUI() noexcept override
    {
        carla_debug("CarlaEngineNativeUI::~CarlaEngineNativeUI()");
    }

protected:
    bool msgReceived(const char* const msg) noexcept override;

private:
    CarlaEngineNative* const fEngine;

    void _updateParamValues(const CarlaPluginPtr& plugin,
                            uint32_t pluginId,
                            bool sendCallback, bool sendPluginHost) const noexcept;

    CARLA_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(CarlaEngineNativeUI)
};

// -----------------------------------------------------------------------

class CarlaEngineNative : public CarlaEngine
{
public:
    CarlaEngineNative(const NativeHostDescriptor* const host, const bool isPatchbay, const bool withMidiOut,
                      const uint32_t inChan = 2, uint32_t outChan = 2,
                      const uint32_t cvIns = 0, const uint32_t cvOuts = 0)
        : CarlaEngine(),
          pHost(host),
#ifdef USE_REFCOUNTER_JUCE_MESSAGE_MANAGER
          // if not running inside Carla, we will have to run event loop ourselves
          kNeedsJuceEvents(host->dispatcher(pHost->handle,
                                            NATIVE_HOST_OPCODE_INTERNAL_PLUGIN, 0, 0, nullptr, 0.0f) == 0),
          fJuceMsgMgr(),
          fJuceMsgMutex(),
#endif
          kIsPatchbay(isPatchbay),
          kHasMidiOut(withMidiOut),
          fIsActive(false),
          fIsRunning(false),
          fUsesEmbed(false),
          fUiServer(this),
          fLastScaleFactor(1.0f),
          fLastProjectFolder(),
          fPluginDeleterMutex(),
          fOptionsForced(false)
    {
        carla_debug("CarlaEngineNative::CarlaEngineNative()");

        carla_zeroFloats(fParameters, kNumInParams+kNumOutParams);

#ifdef USE_REFCOUNTER_JUCE_MESSAGE_MANAGER
        if (kNeedsJuceEvents)
            fJuceMsgMgr->incRef();
#endif

        pData->bufferSize = pHost->get_buffer_size(pHost->handle);
        pData->sampleRate = pHost->get_sample_rate(pHost->handle);
        pData->initTime(nullptr);

#ifndef BUILD_BRIDGE
        // Forced OSC setup when running as plugin
        pData->options.oscEnabled = true;
        pData->options.oscPortTCP = -1;
        pData->options.oscPortUDP = 0;
#endif

        if (outChan == 0)
            outChan = inChan;

        // set-up engine
        if (kIsPatchbay)
        {
            pData->options.processMode         = ENGINE_PROCESS_MODE_PATCHBAY;
            pData->options.transportMode       = ENGINE_TRANSPORT_MODE_PLUGIN;
            pData->options.forceStereo         = false;
            pData->options.preferPluginBridges = false;
            pData->options.preferUiBridges     = false;
            init("Carla-Patchbay");
            pData->graph.create(inChan, outChan, cvIns, cvOuts);
        }
        else
        {
            CARLA_SAFE_ASSERT(inChan == 2);
            CARLA_SAFE_ASSERT(outChan == 2);
            pData->options.processMode         = ENGINE_PROCESS_MODE_CONTINUOUS_RACK;
            pData->options.transportMode       = ENGINE_TRANSPORT_MODE_PLUGIN;
            pData->options.forceStereo         = true;
            pData->options.preferPluginBridges = false;
            pData->options.preferUiBridges     = false;
            init("Carla-Rack");
            pData->graph.create(0, 0, 0, 0); // FIXME?
        }

        if (pData->options.resourceDir != nullptr)
            delete[] pData->options.resourceDir;
        if (pData->options.binaryDir != nullptr)
            delete[] pData->options.binaryDir;

        const water::String binaryDir(File(File::getSpecialLocation(File::currentExecutableFile).getParentDirectory()).getFullPathName());

        pData->options.resourceDir = carla_strdup(pHost->resourceDir);
        pData->options.binaryDir   = carla_strdup(binaryDir.toRawUTF8());
    }

    ~CarlaEngineNative() override
    {
        CARLA_SAFE_ASSERT(! fIsActive);
        carla_debug("CarlaEngineNative::~CarlaEngineNative() - START");

        pData->aboutToClose = true;
        fIsRunning = false;

        {
#ifdef USE_REFCOUNTER_JUCE_MESSAGE_MANAGER
            const ScopedJuceMessageThreadRunner sjmtr(*this, true);
#endif
            removeAllPlugins();
            //runPendingRtEvents();
            close();

            pData->graph.destroy();
        }

#ifdef USE_REFCOUNTER_JUCE_MESSAGE_MANAGER
        if (kNeedsJuceEvents)
            fJuceMsgMgr->decRef();
#endif

        carla_debug("CarlaEngineNative::~CarlaEngineNative() - END");
    }

    // -------------------------------------
    // CarlaEngine virtual calls

    bool init(const char* const clientName) override
    {
        carla_debug("CarlaEngineNative::init(\"%s\")", clientName);

        fIsRunning = true;

        if (! pData->init(clientName))
        {
            close();
            setLastError("Failed to init internal data");
            return false;
        }

        pData->bufferSize = pHost->get_buffer_size(pHost->handle);
        pData->sampleRate = pHost->get_sample_rate(pHost->handle);

        return true;
    }

    bool close() override
    {
        fIsRunning = false;
        CarlaEngine::close();
        return true;
    }

    bool isRunning() const noexcept override
    {
        return fIsRunning;
    }

    bool isOffline() const noexcept override
    {
        return pHost->is_offline(pHost->handle);
    }

    bool usesConstantBufferSize() const noexcept override
    {
        // TODO LV2 hosts can report this, till then we allow this
        return true;
    }

    EngineType getType() const noexcept override
    {
        return kEngineTypePlugin;
    }

    const char* getCurrentDriverName() const noexcept override
    {
        return "Plugin";
    }

    const char* getCurrentProjectFolder() const noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(pHost != nullptr, nullptr);

        static char filetype[] = "carla\0";

        try {
            return (const char*)(uintptr_t)pHost->dispatcher(pHost->handle,
                                                             NATIVE_HOST_OPCODE_GET_FILE_PATH,
                                                             0, 0,
                                                             (void*)filetype,
                                                             0.0f);
        } CARLA_SAFE_EXCEPTION_RETURN("get_file_path", nullptr);
    }

    void callback(const bool sendHost, const bool sendOsc,
                  const EngineCallbackOpcode action, const uint pluginId,
                  const int value1, const int value2, const int value3,
                  const float valuef, const char* const valueStr) noexcept override
    {
        CarlaEngine::callback(sendHost, sendOsc, action, pluginId, value1, value2, value3, valuef, valueStr);

        if (sendHost)
            uiServerCallback(action, pluginId, value1, value2, value3, valuef, valueStr);

        switch (action)
        {
        case ENGINE_CALLBACK_IDLE:
            if (! pData->aboutToClose)
                pHost->dispatcher(pHost->handle, NATIVE_HOST_OPCODE_HOST_IDLE, 0, 0, nullptr, 0.0f);
            break;

        case ENGINE_CALLBACK_PARAMETER_VALUE_CHANGED:
            if (sendHost && value1 >= 0)
            {
                uint32_t rindex = static_cast<uint32_t>(value1);
                if (_getRealIndexForPluginParameter(pluginId, rindex))
                {
                    fParameters[rindex] = valuef;

                    if (fUsesEmbed || fUiServer.isPipeRunning())
                    {
                        pHost->ui_parameter_changed(pHost->handle, rindex, valuef);
                    }
                    else
                    {
                        static uint last_pluginId = pluginId;
                        static int last_value1 = value1;
                        static bool init = true;

                        if (init || last_pluginId != pluginId || last_value1 != value1)
                        {
                            init = false;
                            last_pluginId = pluginId;
                            last_value1 = value1;
                            carla_stdout("Plugin with id %d triggered parameter %d update while UI is hidden",
                                         pluginId, value1);
                        }
                    }
                }
            }
            break;

        default:
            break;
        }
    }

    const char* runFileCallback(FileCallbackOpcode action,
                                bool isDir, const char* title, const char* filter) noexcept override
    {
        switch (action)
        {
        case FILE_CALLBACK_DEBUG:
            return nullptr;

        case FILE_CALLBACK_OPEN:
            return pHost->ui_open_file(pHost->handle, isDir, title, filter);

        case FILE_CALLBACK_SAVE:
            return pHost->ui_save_file(pHost->handle, isDir, title, filter);
        }

        return nullptr;
    }

    // -------------------------------------------------------------------

    void touchPluginParameter(const uint id, const uint32_t parameterId, const bool touch) noexcept override
    {
        setParameterTouchFromUI(id, parameterId, touch);
    }

    // -------------------------------------------------------------------

    void setParameterValueFromUI(const uint32_t pluginId, const uint32_t index, const float value)
    {
        uint32_t rindex = index;
        if (_getRealIndexForPluginParameter(pluginId, rindex))
        {
            fParameters[rindex] = value;
            pHost->ui_parameter_changed(pHost->handle, rindex, value);
        }
    }

    void setParameterTouchFromUI(const uint32_t pluginId, const uint32_t index, const bool touch)
    {
        uint32_t rindex = index;
        if (_getRealIndexForPluginParameter(pluginId, rindex))
        {
            pHost->dispatcher(pHost->handle,
                              NATIVE_HOST_OPCODE_UI_TOUCH_PARAMETER,
                              static_cast<int32_t>(rindex),
                              touch ? 1 : 0,
                              nullptr, 0.0f);
        }
    }

    void reloadFromUI()
    {
        carla_zeroFloats(fParameters, kNumInParams+kNumOutParams);
        pHost->dispatcher(pHost->handle, NATIVE_HOST_OPCODE_RELOAD_PARAMETERS, 0, 0, nullptr, 0.0f);
    }

protected:
    // -------------------------------------------------------------------

    void bufferSizeChanged(const uint32_t newBufferSize)
    {
        if (pData->bufferSize == newBufferSize)
            return;

        {
            const CarlaMutexLocker cml(fUiServer.getPipeLock());

            if (fUiServer.writeMessage("buffer-size\n"))
            {
                char tmpBuf[STR_MAX+1];
                carla_zeroChars(tmpBuf, STR_MAX+1);

                std::snprintf(tmpBuf, STR_MAX, "%i\n", newBufferSize);

                if (fUiServer.writeMessage(tmpBuf))
                    fUiServer.flushMessages();
            }
        }

        pData->bufferSize = newBufferSize;
        CarlaEngine::bufferSizeChanged(newBufferSize);
    }

    void sampleRateChanged(const double newSampleRate)
    {
        if (carla_isEqual(pData->sampleRate, newSampleRate))
            return;

        {
            const CarlaMutexLocker cml(fUiServer.getPipeLock());

            if (fUiServer.writeMessage("sample-rate\n"))
            {
                char tmpBuf[STR_MAX+1];
                carla_zeroChars(tmpBuf, STR_MAX+1);

                {
                    const CarlaScopedLocale csl;
                    std::snprintf(tmpBuf, STR_MAX, "%.12g\n", newSampleRate);
                }

                if (fUiServer.writeMessage(tmpBuf))
                    fUiServer.flushMessages();
            }
        }

        pData->sampleRate = newSampleRate;
        CarlaEngine::sampleRateChanged(newSampleRate);
    }

    // -------------------------------------------------------------------

    void uiServerSendPluginInfo(const CarlaPluginPtr& plugin)
    {
        char tmpBuf[STR_MAX+1];
        carla_zeroChars(tmpBuf, STR_MAX+1);

        const CarlaMutexLocker cml(fUiServer.getPipeLock());

        const uint pluginId(plugin->getId());

        std::snprintf(tmpBuf, STR_MAX, "PLUGIN_INFO_%i\n", pluginId);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        std::snprintf(tmpBuf, STR_MAX, "%i:%i:%i:" P_INT64 ":%i:%i\n",
                      plugin->getType(), plugin->getCategory(),
                      plugin->getHints(), plugin->getUniqueId(),
                      plugin->getOptionsAvailable(), plugin->getOptionsEnabled());
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        if (const char* const filename = plugin->getFilename())
        {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(filename),);
        }
        else
        {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
        }

        if (const char* const name = plugin->getName())
        {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(name),);
        }
        else
        {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
        }

        if (const char* const iconName = plugin->getIconName())
        {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(iconName),);
        }
        else
        {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
        }

        if (plugin->getRealName(tmpBuf)) {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
        } else {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
        }

        if (plugin->getLabel(tmpBuf)) {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
        } else {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
        }

        if (plugin->getMaker(tmpBuf)) {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
        } else {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
        }

        if (plugin->getCopyright(tmpBuf)) {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
        } else {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
        }

        std::snprintf(tmpBuf, STR_MAX, "AUDIO_COUNT_%i:%i:%i\n",
                      pluginId, plugin->getAudioInCount(), plugin->getAudioOutCount());
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        std::snprintf(tmpBuf, STR_MAX, "MIDI_COUNT_%i:%i:%i\n",
                      pluginId, plugin->getMidiInCount(), plugin->getMidiOutCount());
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        fUiServer.flushMessages();
    }

    void uiServerSendPluginParameters(const CarlaPluginPtr& plugin)
    {
        char tmpBuf[STR_MAX+1];
        carla_zeroChars(tmpBuf, STR_MAX+1);

        const CarlaMutexLocker cml(fUiServer.getPipeLock());
        const CarlaScopedLocale csl;

        const uint pluginId(plugin->getId());

        for (int32_t i=PARAMETER_ACTIVE; i>PARAMETER_MAX; --i)
        {
            std::snprintf(tmpBuf, STR_MAX, "PARAMVAL_%u:%i\n", pluginId, i);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            std::snprintf(tmpBuf, STR_MAX, "%.12g\n", static_cast<double>(plugin->getInternalParameterValue(i)));
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            fUiServer.flushMessages();
        }

        uint32_t ins, outs, count;
        plugin->getParameterCountInfo(ins, outs);
        count = plugin->getParameterCount();

        std::snprintf(tmpBuf, STR_MAX, "PARAMETER_COUNT_%i:%i:%i:%i\n", pluginId, ins, outs, count);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        for (uint32_t i=0; i<count; ++i)
        {
            const ParameterData& paramData(plugin->getParameterData(i));
            const ParameterRanges& paramRanges(plugin->getParameterRanges(i));

            std::snprintf(tmpBuf, STR_MAX, "PARAMETER_DATA_%i:%i\n", pluginId, i);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            std::snprintf(tmpBuf, STR_MAX, "%i:%i:%i:%i\n", paramData.type, paramData.hints,
                                                            paramData.mappedControlIndex, paramData.midiChannel);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            std::snprintf(tmpBuf, STR_MAX, "%.12g:%.12g\n", static_cast<double>(paramData.mappedMinimum),
                                                            static_cast<double>(paramData.mappedMaximum));
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            if (plugin->getParameterName(i, tmpBuf)) {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
            } else {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
            }

            if (plugin->getParameterUnit(i, tmpBuf)) {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
            } else {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
            }

            if (plugin->getParameterComment(i, tmpBuf)) {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
            } else {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
            }

            if (plugin->getParameterGroupName(i, tmpBuf)) {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
            } else {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
            }

            std::snprintf(tmpBuf, STR_MAX, "PARAMETER_RANGES_%i:%i\n", pluginId, i);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            std::snprintf(tmpBuf, STR_MAX, "%.12g:%.12g:%.12g:%.12g:%.12g:%.12g\n",
                          static_cast<double>(paramRanges.def),
                          static_cast<double>(paramRanges.min),
                          static_cast<double>(paramRanges.max),
                          static_cast<double>(paramRanges.step),
                          static_cast<double>(paramRanges.stepSmall),
                          static_cast<double>(paramRanges.stepLarge));
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            std::snprintf(tmpBuf, STR_MAX, "PARAMVAL_%u:%u\n", pluginId, i);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            std::snprintf(tmpBuf, STR_MAX, "%.12g\n", static_cast<double>(plugin->getParameterValue(i)));
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        }

        fUiServer.flushMessages();
    }

    void uiServerSendPluginPrograms(const CarlaPluginPtr& plugin)
    {
        char tmpBuf[STR_MAX+1];
        carla_zeroChars(tmpBuf, STR_MAX+1);

        const CarlaMutexLocker cml(fUiServer.getPipeLock());

        const uint pluginId(plugin->getId());

        uint32_t count = plugin->getProgramCount();
        std::snprintf(tmpBuf, STR_MAX, "PROGRAM_COUNT_%i:%i:%i\n", pluginId, count, plugin->getCurrentProgram());
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        for (uint32_t i=0; i<count; ++i)
        {
            std::snprintf(tmpBuf, STR_MAX, "PROGRAM_NAME_%i:%i\n", pluginId, i);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            if (plugin->getProgramName(i, tmpBuf)) {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
            } else {
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
            }
        }

        fUiServer.flushMessages();

        count = plugin->getMidiProgramCount();
        std::snprintf(tmpBuf, STR_MAX, "MIDI_PROGRAM_COUNT_%i:%i:%i\n",
                      pluginId, count, plugin->getCurrentMidiProgram());
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        for (uint32_t i=0; i<count; ++i)
        {
            std::snprintf(tmpBuf, STR_MAX, "MIDI_PROGRAM_DATA_%i:%i\n", pluginId, i);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            const MidiProgramData& mpData(plugin->getMidiProgramData(i));

            std::snprintf(tmpBuf, STR_MAX, "%i:%i\n", mpData.bank, mpData.program);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(mpData.name),);
        }

        fUiServer.flushMessages();
    }

    void uiServerSendPluginProperties(const CarlaPluginPtr& plugin)
    {
        char tmpBuf[STR_MAX+1];
        carla_zeroChars(tmpBuf, STR_MAX+1);

        const CarlaMutexLocker cml(fUiServer.getPipeLock());

        const uint pluginId(plugin->getId());

        uint32_t count = plugin->getCustomDataCount();
        std::snprintf(tmpBuf, STR_MAX, "CUSTOM_DATA_COUNT_%i:%i\n", pluginId, count);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        for (uint32_t i=0; i<count; ++i)
        {
            const CustomData& customData(plugin->getCustomData(i));
            CARLA_SAFE_ASSERT_CONTINUE(customData.isValid());

            if (std::strcmp(customData.type, CUSTOM_DATA_TYPE_PROPERTY) != 0)
                continue;

            std::snprintf(tmpBuf, STR_MAX, "CUSTOM_DATA_%i:%i\n", pluginId, i);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(customData.type),);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(customData.key),);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(customData.value),);
        }

        fUiServer.flushMessages();
    }

    void uiServerCallback(const EngineCallbackOpcode action, const uint pluginId,
                          const int value1, const int value2, const int value3,
                          const float valuef, const char* const valueStr)
    {
        if (! fIsRunning)
            return;
        if (! fUiServer.isPipeRunning())
            return;

        switch (action)
        {
        case ENGINE_CALLBACK_UPDATE:
            if (const CarlaPluginPtr plugin = getPlugin(pluginId))
            {
                if (plugin->isEnabled())
                {
                    CARLA_SAFE_ASSERT_BREAK(plugin->getId() == pluginId);
                    uiServerSendPluginProperties(plugin);
                }
            }
            break;

        case ENGINE_CALLBACK_RELOAD_INFO:
            if (const CarlaPluginPtr plugin = getPlugin(pluginId))
            {
                if (plugin->isEnabled())
                {
                    CARLA_SAFE_ASSERT_BREAK(plugin->getId() == pluginId);
                    uiServerSendPluginInfo(plugin);
                }
            }
            break;

        case ENGINE_CALLBACK_RELOAD_PARAMETERS:
            if (const CarlaPluginPtr plugin = getPlugin(pluginId))
            {
                if (plugin->isEnabled())
                {
                    CARLA_SAFE_ASSERT_BREAK(plugin->getId() == pluginId);
                    uiServerSendPluginParameters(plugin);
                }
            }
            break;

        case ENGINE_CALLBACK_RELOAD_PROGRAMS:
            if (const CarlaPluginPtr plugin = getPlugin(pluginId))
            {
                if (plugin->isEnabled())
                {
                    CARLA_SAFE_ASSERT_BREAK(plugin->getId() == pluginId);
                    uiServerSendPluginPrograms(plugin);
                }
            }
            break;

        case ENGINE_CALLBACK_RELOAD_ALL:
        case ENGINE_CALLBACK_PLUGIN_ADDED:
        case ENGINE_CALLBACK_PLUGIN_RENAMED:
            if (const CarlaPluginPtr plugin = getPlugin(pluginId))
            {
                if (plugin->isEnabled())
                {
                    CARLA_SAFE_ASSERT_BREAK(plugin->getId() == pluginId);
                    uiServerSendPluginInfo(plugin);
                    uiServerSendPluginParameters(plugin);
                    uiServerSendPluginPrograms(plugin);
                    uiServerSendPluginProperties(plugin);
                }
            }
            break;

        default:
            break;
        }

        char tmpBuf[STR_MAX+1];
        carla_zeroChars(tmpBuf, STR_MAX+1);

        const CarlaMutexLocker cml(fUiServer.getPipeLock());

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_CALLBACK_%i\n", int(action));
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        std::snprintf(tmpBuf, STR_MAX, "%u\n", pluginId);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        std::snprintf(tmpBuf, STR_MAX, "%i\n", value1);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        std::snprintf(tmpBuf, STR_MAX, "%i\n", value2);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        std::snprintf(tmpBuf, STR_MAX, "%i\n", value3);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        {
            const CarlaScopedLocale csl;
            std::snprintf(tmpBuf, STR_MAX, "%.12g\n", static_cast<double>(valuef));
        }
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        if (valueStr != nullptr) {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(valueStr),);
        } else {
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
        }

        fUiServer.flushMessages();
    }

    void uiServerInfo()
    {
        CARLA_SAFE_ASSERT_RETURN(fIsRunning,);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.isPipeRunning(),);

        char tmpBuf[STR_MAX+1];
        carla_zeroChars(tmpBuf, STR_MAX+1);

        const CarlaMutexLocker cml(fUiServer.getPipeLock());

#if defined(HAVE_LIBLO) && !defined(BUILD_BRIDGE)
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("osc-urls\n"),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(pData->osc.getServerPathTCP()),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(pData->osc.getServerPathUDP()),);
#endif

        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("max-plugin-number\n"),);
        std::snprintf(tmpBuf, STR_MAX, "%i\n", pData->maxPluginNumber);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("buffer-size\n"),);
        std::snprintf(tmpBuf, STR_MAX, "%i\n", pData->bufferSize);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("sample-rate\n"),);
        {
            const CarlaScopedLocale csl;
            std::snprintf(tmpBuf, STR_MAX, "%.12g\n", pData->sampleRate);
        }
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        fUiServer.flushMessages();
    }

    void uiServerOptions()
    {
        CARLA_SAFE_ASSERT_RETURN(fIsRunning,);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.isPipeRunning(),);

        char tmpBuf[STR_MAX+1];
        carla_zeroChars(tmpBuf, STR_MAX+1);

        const EngineOptions& options(pData->options);
        const CarlaMutexLocker cml(fUiServer.getPipeLock());

        const char* const optionsForcedStr(fOptionsForced ? "true\n" : "false\n");
        const std::size_t optionsForcedStrSize(fOptionsForced ? 5 : 6);

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PROCESS_MODE);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize),);
        std::snprintf(tmpBuf, STR_MAX, "%i\n", options.processMode);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        fUiServer.flushMessages();

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_TRANSPORT_MODE);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize),);
        std::snprintf(tmpBuf, STR_MAX, "%i\n", options.transportMode);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        fUiServer.flushMessages();

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_FORCE_STEREO);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(options.forceStereo ? "true\n" : "false\n"),);
        fUiServer.flushMessages();

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PREFER_PLUGIN_BRIDGES);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(options.preferPluginBridges ? "true\n" : "false\n"),);
        fUiServer.flushMessages();

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PREFER_UI_BRIDGES);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(options.preferUiBridges ? "true\n" : "false\n"),);
        fUiServer.flushMessages();

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_UIS_ALWAYS_ON_TOP);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(options.uisAlwaysOnTop ? "true\n" : "false\n"),);
        fUiServer.flushMessages();

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_MAX_PARAMETERS);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize),);
        std::snprintf(tmpBuf, STR_MAX, "%i\n", options.maxParameters);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        fUiServer.flushMessages();

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_UI_BRIDGES_TIMEOUT);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize),);
        std::snprintf(tmpBuf, STR_MAX, "%i\n", options.uiBridgesTimeout);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        fUiServer.flushMessages();

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PATH_BINARIES);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("true\n", 5),);
        std::snprintf(tmpBuf, STR_MAX, "%s\n", options.binaryDir);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        fUiServer.flushMessages();

        std::snprintf(tmpBuf, STR_MAX, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PATH_RESOURCES);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("true\n", 5),);
        std::snprintf(tmpBuf, STR_MAX, "%s\n", options.resourceDir);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        fUiServer.flushMessages();
    }

    // -------------------------------------------------------------------
    // Plugin parameter calls

    uint32_t getParameterCount() const
    {
        return kNumInParams + kNumOutParams;
    }

    const NativeParameter* getParameterInfo(const uint32_t index) const
    {
        static NativeParameter param;

        static char strBufName[STR_MAX+1];
        static char strBufUnit[STR_MAX+1];
        static char strBufComment[STR_MAX+1];
        static char strBufGroupName[STR_MAX+1];
        carla_zeroChars(strBufName, STR_MAX+1);
        carla_zeroChars(strBufUnit, STR_MAX+1);
        carla_zeroChars(strBufComment, STR_MAX+1);
        carla_zeroChars(strBufGroupName, STR_MAX+1);

        uint32_t rindex = index;
        if (const CarlaPluginPtr plugin = _getPluginForParameterIndex(rindex))
        {
            const ParameterData& paramData(plugin->getParameterData(rindex));
            const ParameterRanges& paramRanges(plugin->getParameterRanges(rindex));

            if (! plugin->getParameterName(rindex, strBufName))
                strBufName[0] = '\0';
            if (! plugin->getParameterUnit(rindex, strBufUnit))
                strBufUnit[0] = '\0';
            if (! plugin->getParameterComment(rindex, strBufComment))
                strBufComment[0] = '\0';
            if (! plugin->getParameterGroupName(rindex, strBufGroupName))
                std::snprintf(strBufGroupName, STR_MAX, "%u:%s", plugin->getId(), plugin->getName());

            uint hints = 0x0;

            if (paramData.hints & PARAMETER_IS_BOOLEAN)
                hints |= NATIVE_PARAMETER_IS_BOOLEAN;
            if (paramData.hints & PARAMETER_IS_INTEGER)
                hints |= NATIVE_PARAMETER_IS_INTEGER;
            if (paramData.hints & PARAMETER_IS_LOGARITHMIC)
                hints |= NATIVE_PARAMETER_IS_LOGARITHMIC;
            if (paramData.hints & PARAMETER_IS_AUTOMATABLE)
                hints |= NATIVE_PARAMETER_IS_AUTOMATABLE;
            if (paramData.hints & PARAMETER_USES_SAMPLERATE)
                hints |= NATIVE_PARAMETER_USES_SAMPLE_RATE;
            if (paramData.hints & PARAMETER_USES_SCALEPOINTS)
                hints |= NATIVE_PARAMETER_USES_SCALEPOINTS;

            if (paramData.type == PARAMETER_INPUT || paramData.type == PARAMETER_OUTPUT)
            {
                if (paramData.hints & PARAMETER_IS_ENABLED)
                    hints |= NATIVE_PARAMETER_IS_ENABLED;
                if (paramData.type == PARAMETER_OUTPUT)
                    hints |= NATIVE_PARAMETER_IS_OUTPUT;
            }

            param.hints = static_cast<NativeParameterHints>(hints);
            param.name  = strBufName;
            param.unit  = strBufUnit;
            param.comment = strBufComment;
            param.groupName = strBufGroupName;
            param.ranges.def = paramRanges.def;
            param.ranges.min = paramRanges.min;
            param.ranges.max = paramRanges.max;
            param.ranges.step = paramRanges.step;
            param.ranges.stepSmall = paramRanges.stepSmall;
            param.ranges.stepLarge = paramRanges.stepLarge;
            param.scalePointCount = 0; // TODO
            param.scalePoints = nullptr;

            return &param;
        }

        param.hints = index < kNumInParams ? static_cast<NativeParameterHints>(0x0) : NATIVE_PARAMETER_IS_OUTPUT;
        param.name  = "Unused";
        param.unit  = "";
        param.ranges.def = 0.0f;
        param.ranges.min = 0.0f;
        param.ranges.max = 1.0f;
        param.ranges.step = 0.01f;
        param.ranges.stepSmall = 0.001f;
        param.ranges.stepLarge = 0.1f;
        param.scalePointCount = 0;
        param.scalePoints = nullptr;

        return &param;
    }

    float getParameterValue(const uint32_t index) const
    {
        uint32_t rindex = index;
        if (const CarlaPluginPtr plugin = _getPluginForParameterIndex(rindex))
            return plugin->getParameterValue(rindex);

        return fParameters[index];
    }

    // -------------------------------------------------------------------
    // Plugin state calls

    void setParameterValue(const uint32_t index, const float value)
    {
        uint32_t rindex = index;
        if (const CarlaPluginPtr plugin = _getPluginForParameterIndex(rindex))
            plugin->setParameterValueRT(rindex, value, false);

        fParameters[index] = value;
    }

    // -------------------------------------------------------------------
    // Plugin process calls

    void activate()
    {
#if 0
        for (uint i=0; i < pData->curPluginCount; ++i)
        {
            CarlaPluginPtr plugin = pData->plugins[i].plugin;

            if (plugin == nullptr || ! plugin->isEnabled())
                continue;

            plugin->setActive(true, true, false);
        }
#endif
        fIsActive = true;
    }

    void deactivate()
    {
        fIsActive = false;
#if 0
        for (uint i=0; i < pData->curPluginCount; ++i)
        {
            CarlaPluginPtr plugin = pData->plugins[i].plugin;

            if (plugin == nullptr || ! plugin->isEnabled())
                continue;

            plugin->setActive(false, true, false);
        }
#endif

        // just in case
        //runPendingRtEvents();
    }

    void process(const float* const* const inBuffer, float** const outBuffer, const uint32_t frames,
                 const NativeMidiEvent* const midiEvents, const uint32_t midiEventCount)
    {
        if (frames > pData->bufferSize)
        {
            carla_stderr2("Host is calling process with too high number of frames! %u vs %u",
                          frames, pData->bufferSize);

            deactivate();
            bufferSizeChanged(frames);
            activate();
        }

        const PendingRtEventsRunner prt(this, frames, true);

        // ---------------------------------------------------------------
        // Time Info

        const NativeTimeInfo* const timeInfo(pHost->get_time_info(pHost->handle));

        pData->timeInfo.playing   = timeInfo->playing;
        pData->timeInfo.frame     = timeInfo->frame;
        pData->timeInfo.usecs     = timeInfo->usecs;
        pData->timeInfo.bbt.valid = timeInfo->bbt.valid;

        if (timeInfo->bbt.valid)
        {
            pData->timeInfo.bbt.bar = timeInfo->bbt.bar;
            pData->timeInfo.bbt.beat = timeInfo->bbt.beat;
            pData->timeInfo.bbt.tick = timeInfo->bbt.tick;
            pData->timeInfo.bbt.barStartTick = timeInfo->bbt.barStartTick;

            pData->timeInfo.bbt.beatsPerBar = timeInfo->bbt.beatsPerBar;
            pData->timeInfo.bbt.beatType = timeInfo->bbt.beatType;

            pData->timeInfo.bbt.ticksPerBeat = timeInfo->bbt.ticksPerBeat;
            pData->timeInfo.bbt.beatsPerMinute = timeInfo->bbt.beatsPerMinute;
        }

        // ---------------------------------------------------------------
        // Do nothing if no plugins and rack mode

        if (pData->curPluginCount == 0 && ! kIsPatchbay)
        {
            if (outBuffer[0] != inBuffer[0])
                carla_copyFloats(outBuffer[0], inBuffer[0], frames);

            if (outBuffer[1] != inBuffer[1])
                carla_copyFloats(outBuffer[1], inBuffer[1], frames);

            for (uint32_t i=0; i < midiEventCount; ++i)
            {
                if (! pHost->write_midi_event(pHost->handle, &midiEvents[i]))
                    break;
            }
            return;
        }

        // ---------------------------------------------------------------
        // initialize events

        carla_zeroStructs(pData->events.in,  kMaxEngineEventInternalCount);
        carla_zeroStructs(pData->events.out, kMaxEngineEventInternalCount);

        // ---------------------------------------------------------------
        // events input (before processing)

        {
            uint32_t engineEventIndex = 0;

            for (uint32_t i=0; i < midiEventCount && engineEventIndex < kMaxEngineEventInternalCount; ++i)
            {
                const NativeMidiEvent& midiEvent(midiEvents[i]);
                EngineEvent&           engineEvent(pData->events.in[engineEventIndex++]);

                engineEvent.time = midiEvent.time;
                engineEvent.fillFromMidiData(midiEvent.size, midiEvent.data, 0);

                if (engineEventIndex >= kMaxEngineEventInternalCount)
                    break;
            }
        }

        if (kIsPatchbay)
        {
            // -----------------------------------------------------------
            // process

            pData->graph.process(pData, inBuffer, outBuffer, frames);
        }
        else
        {
            // -----------------------------------------------------------
            // create audio buffers

            const float* inBuf[2]  = {  inBuffer[0],  inBuffer[1] };
            /* */ float* outBuf[2] = { outBuffer[0], outBuffer[1] };

            // -----------------------------------------------------------
            // process

            pData->graph.processRack(pData, inBuf, outBuf, frames);
        }

        // ---------------------------------------------------------------
        // events output (after processing)

        carla_zeroStructs(pData->events.in, kMaxEngineEventInternalCount);

        if (kHasMidiOut)
        {
            NativeMidiEvent midiEvent;

            for (uint32_t i=0; i < kMaxEngineEventInternalCount; ++i)
            {
                const EngineEvent& engineEvent(pData->events.out[i]);

                if (engineEvent.type == kEngineEventTypeNull)
                    break;

                carla_zeroStruct(midiEvent);
                midiEvent.time = engineEvent.time;

                /**/ if (engineEvent.type == kEngineEventTypeControl)
                {
                    midiEvent.port = 0;
                    midiEvent.size = engineEvent.ctrl.convertToMidiData(engineEvent.channel, midiEvent.data);
                }
                else if (engineEvent.type == kEngineEventTypeMidi)
                {
                    if (engineEvent.midi.size > 4)
                        continue;

                    midiEvent.port = engineEvent.midi.port;
                    midiEvent.size = engineEvent.midi.size;

                    midiEvent.data[0] = static_cast<uint8_t>(engineEvent.midi.data[0] | (engineEvent.channel & MIDI_CHANNEL_BIT));

                    for (uint8_t j=1; j < midiEvent.size; ++j)
                        midiEvent.data[j] = engineEvent.midi.data[j];
                }
                else
                {
                    continue;
                }

                if (midiEvent.size > 0)
                    pHost->write_midi_event(pHost->handle, &midiEvent);
            }
        }
    }

    // -------------------------------------------------------------------
    // Plugin UI calls

    void uiShow(const bool show)
    {
        if (show)
        {
            if (fUiServer.isPipeRunning())
            {
                fUiServer.writeFocusMessage();
                return;
            }

            CarlaString path(pHost->resourceDir);

            if (kIsPatchbay)
                path += CARLA_OS_SEP_STR "carla-plugin-patchbay";
            else
                path += CARLA_OS_SEP_STR "carla-plugin";
#ifdef CARLA_OS_WIN
            path += ".exe";
#endif
            carla_stdout("Trying to start carla-plugin using \"%s\"", path.buffer());

            fUiServer.setData(path, pData->sampleRate, pHost->uiName);

            if (! fUiServer.startPipeServer(false))
            {
                pHost->dispatcher(pHost->handle, NATIVE_HOST_OPCODE_UI_UNAVAILABLE, 0, 0, nullptr, 0.0f);
                return;
            }

            uiServerInfo();
            uiServerOptions();
            uiServerCallback(ENGINE_CALLBACK_ENGINE_STARTED,
                             pData->curPluginCount,
                             pData->options.processMode,
                             pData->options.transportMode,
                             static_cast<int>(pData->bufferSize),
                             static_cast<float>(pData->sampleRate),
                             "Plugin");

            fUiServer.writeShowMessage();

            for (uint i=0; i < pData->curPluginCount; ++i)
            {
                if (const CarlaPluginPtr plugin = pData->plugins[i].plugin)
                    if (plugin->isEnabled())
                        uiServerCallback(ENGINE_CALLBACK_PLUGIN_ADDED, i, plugin->getType(),
                                         0, 0, 0.0f,
                                         plugin->getName());
            }

            if (kIsPatchbay)
                patchbayRefresh(true, false, false);
        }
        else
        {
            fUiServer.stopPipeServer(2000);

            // hide all custom uis
            for (uint i=0; i < pData->curPluginCount; ++i)
            {
                if (const CarlaPluginPtr plugin = pData->plugins[i].plugin)
                {
                    if (plugin->isEnabled())
                    {
                        if (plugin->getHints() & PLUGIN_HAS_CUSTOM_UI)
                        {
                            try {
                                plugin->showCustomUI(false);
                            } CARLA_SAFE_EXCEPTION_CONTINUE("Plugin showCustomUI (hide)");
                        }
                    }
                }
            }
        }
    }

    void uiIdle()
    {
#ifdef USE_REFCOUNTER_JUCE_MESSAGE_MANAGER
        const ScopedJuceMessageThreadRunner sjmtr(*this, false);

        if (kNeedsJuceEvents && ! sjmtr.wasLocked)
            return;
#endif

        for (uint i=0; i < pData->curPluginCount; ++i)
        {
            if (const CarlaPluginPtr plugin = pData->plugins[i].plugin)
            {
                if (plugin->isEnabled())
                {
                    const uint hints = plugin->getHints();

                    if ((hints & PLUGIN_HAS_CUSTOM_UI) != 0 && (hints & PLUGIN_NEEDS_UI_MAIN_THREAD) != 0)
                    {
                        try {
                            plugin->uiIdle();
                        } CARLA_SAFE_EXCEPTION_CONTINUE("Plugin uiIdle");
                    }
                }
            }
        }

        idlePipe();

        switch (fUiServer.getAndResetUiState())
        {
        case CarlaExternalUI::UiNone:
        case CarlaExternalUI::UiShow:
            break;
        case CarlaExternalUI::UiCrashed:
            pHost->dispatcher(pHost->handle, NATIVE_HOST_OPCODE_UI_UNAVAILABLE, 0, 0, nullptr, 0.0f);
            break;
        case CarlaExternalUI::UiHide:
            pHost->ui_closed(pHost->handle);
            fUiServer.stopPipeServer(1000);
            break;
        }

        if (carla_isNotEqual(fLastScaleFactor, pData->options.uiScale))
        {
            fLastScaleFactor = pData->options.uiScale;
            pHost->dispatcher(pHost->handle,
                              NATIVE_HOST_OPCODE_UI_RESIZE,
                              static_cast<int>(kUiWidth * fLastScaleFactor + 0.5f),
                              static_cast<int>(kUiHeight * fLastScaleFactor + 0.5f),
                              nullptr, 0.0f);
        }

        {
            const CarlaMutexLocker cml(fPluginDeleterMutex);
            pData->deletePluginsAsNeeded();
        }
    }

    void uiSetParameterValue(const uint32_t index, const float value)
    {
        uint32_t rindex = index;
        if (const CarlaPluginPtr plugin = _getPluginForParameterIndex(rindex))
        {
            if (plugin->getHints() & PLUGIN_HAS_CUSTOM_UI)
                plugin->uiParameterChange(rindex, value);

            if (index >= kNumInParams || ! fUiServer.isPipeRunning())
                return;

            uiServerCallback(ENGINE_CALLBACK_PARAMETER_VALUE_CHANGED,
                             plugin->getId(),
                             static_cast<int>(rindex),
                             0, 0,
                             value,
                             nullptr);
        }
    }

    void idlePipe()
    {
        if (! fUiServer.isPipeRunning())
            return;

        fUiServer.idlePipe();

        if (! fUiServer.isPipeRunning())
            return;

        char tmpBuf[STR_MAX+1];
        carla_zeroChars(tmpBuf, STR_MAX+1);

        const CarlaMutexLocker cml(fUiServer.getPipeLock());
        const CarlaScopedLocale csl;
        const EngineTimeInfo& timeInfo(pData->timeInfo);

        // ------------------------------------------------------------------------------------------------------------
        // send engine info

        std::snprintf(tmpBuf, STR_MAX, "%.12g:0\n", static_cast<double>(getDSPLoad()));
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("runtime-info\n"),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

        fUiServer.flushMessages();

        if (const char* const projFolder = getCurrentProjectFolder())
        {
            if (fLastProjectFolder != projFolder)
            {
                carla_stdout("Project folder changed to %s", projFolder);
                fLastProjectFolder = projFolder;
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("project-folder\n"),);
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(projFolder),);
                fUiServer.flushMessages();
            }
        }

        // ------------------------------------------------------------------------------------------------------------
        // send transport

        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("transport\n"),);
        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(timeInfo.playing ? "true\n" : "false\n"),);

        if (timeInfo.bbt.valid)
        {
            std::snprintf(tmpBuf, STR_MAX, P_UINT64 ":%i:%i:%i\n", timeInfo.frame,
                                                                   timeInfo.bbt.bar,
                                                                   timeInfo.bbt.beat,
                                                                   static_cast<int>(timeInfo.bbt.tick + 0.5));
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
            std::snprintf(tmpBuf, STR_MAX, "%.12g\n", timeInfo.bbt.beatsPerMinute);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
        }
        else
        {
            std::snprintf(tmpBuf, STR_MAX, P_UINT64 ":0:0:0\n", timeInfo.frame);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("0.0\n"),);
        }

        fUiServer.flushMessages();

        // ------------------------------------------------------------------------------------------------------------
        // send peaks and param outputs for all plugins

        for (uint i=0; i < pData->curPluginCount; ++i)
        {
            const EnginePluginData& plugData(pData->plugins[i]);
            const CarlaPluginPtr plugin = pData->plugins[i].plugin;

            std::snprintf(tmpBuf, STR_MAX, "PEAKS_%i\n", i);
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
            std::snprintf(tmpBuf, STR_MAX, "%.12g:%.12g:%.12g:%.12g\n",
                          static_cast<double>(plugData.peaks[0]),
                          static_cast<double>(plugData.peaks[1]),
                          static_cast<double>(plugData.peaks[2]),
                          static_cast<double>(plugData.peaks[3]));
            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

            fUiServer.flushMessages();

            for (uint32_t j=0, count=plugin->getParameterCount(); j < count; ++j)
            {
                if (! plugin->isParameterOutput(j))
                    continue;

                std::snprintf(tmpBuf, STR_MAX, "PARAMVAL_%u:%u\n", i, j);
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
                std::snprintf(tmpBuf, STR_MAX, "%.12g\n", static_cast<double>(plugin->getParameterValue(j)));
                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);

                fUiServer.flushMessages();
            }
        }
    }

    // -------------------------------------------------------------------
    // Plugin state calls

    char* getState() const
    {
        MemoryOutputStream out;
        saveProjectInternal(out);
        return strdup(out.toString().toRawUTF8());
    }

    void setState(const char* const data)
    {
#ifdef USE_REFCOUNTER_JUCE_MESSAGE_MANAGER
        const ScopedJuceMessageThreadRunner sjmtr(*this, true);
#endif

        // remove all plugins from UI side
        for (uint i=0, count=pData->curPluginCount; i < count; ++i)
            CarlaEngine::callback(true, true, ENGINE_CALLBACK_PLUGIN_REMOVED, count-i-1, 0, 0, 0, 0.0f, nullptr);

        // remove all plugins from backend, no lock
        fIsRunning = false;
        removeAllPlugins();
        fIsRunning = true;

        {
            const CarlaMutexLocker cml(fPluginDeleterMutex);
            pData->deletePluginsAsNeeded();
        }

        // stopped during removeAllPlugins()
        if (! pData->thread.isThreadRunning())
            pData->thread.startThread();

        fOptionsForced = true;
        const String state(data);
        XmlDocument xml(state);
        loadProjectInternal(xml, true);

        reloadFromUI();
    }

    // -------------------------------------------------------------------

public:
    #define handlePtr ((CarlaEngineNative*)handle)

    static NativePluginHandle _instantiateRack(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, false, true);
    }

    static NativePluginHandle _instantiateRackNoMidiOut(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, false, false);
    }

    static NativePluginHandle _instantiatePatchbay(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, true, true);
    }

    static NativePluginHandle _instantiatePatchbay3s(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, true, true, 3, 2);
    }

    static NativePluginHandle _instantiatePatchbay16(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, true, true, 16, 16);
    }

    static NativePluginHandle _instantiatePatchbay32(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, true, true, 32, 32);
    }

    static NativePluginHandle _instantiatePatchbay64(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, true, true, 64, 64);
    }

    static NativePluginHandle _instantiatePatchbayCV(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, true, true, 2, 2, 5, 5);
    }

    static NativePluginHandle _instantiatePatchbayCV8(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, true, true, 2, 2, 8, 8);
    }

    static NativePluginHandle _instantiatePatchbayCV32(const NativeHostDescriptor* host)
    {
        return new CarlaEngineNative(host, true, true, 64, 64, 32, 32);
    }

    static void _cleanup(NativePluginHandle handle)
    {
        delete handlePtr;
    }

    static uint32_t _get_parameter_count(NativePluginHandle handle)
    {
        return handlePtr->getParameterCount();
    }

    static const NativeParameter* _get_parameter_info(NativePluginHandle handle, uint32_t index)
    {
        return handlePtr->getParameterInfo(index);
    }

    static float _get_parameter_value(NativePluginHandle handle, uint32_t index)
    {
        return handlePtr->getParameterValue(index);
    }

    static void _set_parameter_value(NativePluginHandle handle, uint32_t index, float value)
    {
        handlePtr->setParameterValue(index, value);
    }

    static void _ui_show(NativePluginHandle handle, bool show)
    {
        handlePtr->uiShow(show);
    }

    static void _ui_idle(NativePluginHandle handle)
    {
        handlePtr->uiIdle();
    }

    static void _ui_set_parameter_value(NativePluginHandle handle, uint32_t index, float value)
    {
        handlePtr->uiSetParameterValue(index, value);
    }

    static void _activate(NativePluginHandle handle)
    {
        handlePtr->activate();
    }

    static void _deactivate(NativePluginHandle handle)
    {
        handlePtr->deactivate();
    }

    // FIXME for v3.0, use const for the input buffer
    static void _process(NativePluginHandle handle,
                         float** inBuffer, float** outBuffer, const uint32_t frames,
                         const NativeMidiEvent* midiEvents, uint32_t midiEventCount)
    {
        handlePtr->process(inBuffer, outBuffer, frames, midiEvents, midiEventCount);
    }

    static char* _get_state(NativePluginHandle handle)
    {
        return handlePtr->getState();
    }

    static void _set_state(NativePluginHandle handle, const char* data)
    {
        handlePtr->setState(data);
    }

    static intptr_t _dispatcher(NativePluginHandle handle,
                                NativePluginDispatcherOpcode opcode,
                                int32_t index, intptr_t value, void* ptr, float opt)
    {
        switch(opcode)
        {
        case NATIVE_PLUGIN_OPCODE_NULL:
            return 0;
        case NATIVE_PLUGIN_OPCODE_BUFFER_SIZE_CHANGED:
            CARLA_SAFE_ASSERT_RETURN(value > 0, 0);
            handlePtr->bufferSizeChanged(static_cast<uint32_t>(value));
            return 0;
        case NATIVE_PLUGIN_OPCODE_SAMPLE_RATE_CHANGED:
            CARLA_SAFE_ASSERT_RETURN(opt > 0.0f, 0);
            handlePtr->sampleRateChanged(static_cast<double>(opt));
            return 0;
        case NATIVE_PLUGIN_OPCODE_OFFLINE_CHANGED:
            handlePtr->offlineModeChanged(value != 0);
            return 0;
        case NATIVE_PLUGIN_OPCODE_UI_NAME_CHANGED:
            //handlePtr->uiNameChanged(static_cast<const char*>(ptr));
            return 0;
        case NATIVE_PLUGIN_OPCODE_GET_INTERNAL_HANDLE: {
            CarlaEngineNative* const engine = handlePtr;
            return (intptr_t)(CarlaEngine*)engine;
        }
        case NATIVE_PLUGIN_OPCODE_IDLE:
            //handlePtr->idle();
            return 0;
        case NATIVE_PLUGIN_OPCODE_UI_MIDI_EVENT:
            return 0;
        case NATIVE_PLUGIN_OPCODE_HOST_USES_EMBED:
            handlePtr->fUsesEmbed = true;
            return 0;
        }

        return 0;

        // unused
        (void)index;
        (void)ptr;
    }

    // -------------------------------------------------------------------

    #undef handlePtr

private:
    const NativeHostDescriptor* const pHost;

#ifdef USE_REFCOUNTER_JUCE_MESSAGE_MANAGER
    const bool kNeedsJuceEvents;
    const juce::SharedResourcePointer<ReferenceCountedJuceMessageMessager> fJuceMsgMgr;
    CarlaMutex fJuceMsgMutex;

    struct ScopedJuceMessageThreadRunner {
        const CarlaMutexTryLocker cmtl;
        const bool wasLocked;
        juce::MessageManager* msgMgr;

        ScopedJuceMessageThreadRunner(CarlaEngineNative& self, const bool forceLock) noexcept
            : cmtl(self.fJuceMsgMutex, forceLock),
              wasLocked(cmtl.wasLocked()),
              msgMgr(nullptr)
        {
            if (! self.kNeedsJuceEvents)
                return;
            if (! wasLocked)
                return;

            juce::MessageManager* const msgMgr2 = juce::MessageManager::getInstanceWithoutCreating();
            CARLA_SAFE_ASSERT_RETURN(msgMgr2 != nullptr,);

            if (! msgMgr2->isThisTheMessageThread())
            {
                try {
                    msgMgr2->setCurrentThreadAsMessageThread();
                } CARLA_SAFE_EXCEPTION_RETURN("setCurrentThreadAsMessageThread",);
            }

            msgMgr = msgMgr2;
        }

        ~ScopedJuceMessageThreadRunner()
        {
            if (msgMgr == nullptr)
                return;

            const juce::MessageManagerLock mml;

            for (; msgMgr->dispatchNextMessageOnSystemQueue(true);) {}
        }

        CARLA_DECLARE_NON_COPY_STRUCT(ScopedJuceMessageThreadRunner)
    };
#endif

    const bool kIsPatchbay; // rack if false
    const bool kHasMidiOut;
    bool fIsActive, fIsRunning, fUsesEmbed;
    CarlaEngineNativeUI fUiServer;

    float fParameters[kNumInParams+kNumOutParams];
    float fLastScaleFactor;
    CarlaString fLastProjectFolder;
    CarlaMutex fPluginDeleterMutex;

    bool fOptionsForced;

    CarlaPluginPtr _getPluginForParameterIndex(uint32_t& index) const noexcept
    {
        if (pData->curPluginCount == 0 || pData->plugins == nullptr)
            return nullptr;

        for (uint32_t i=0; i<pData->curPluginCount; ++i)
        {
            const CarlaPluginPtr plugin = pData->plugins[i].plugin;

            if (plugin.get() == nullptr || ! plugin->isEnabled())
                break;

            if (const uint32_t paramCount = plugin->getParameterCount())
            {
                if (index >= paramCount)
                {
                    index -= paramCount;
                    continue;
                }

                return plugin;
            }
        }

        return nullptr;
    }

    bool _getRealIndexForPluginParameter(const uint32_t pluginId, uint32_t& rindex) const noexcept
    {
        if (pData->curPluginCount == 0 || pluginId >= pData->curPluginCount || pData->plugins == nullptr)
            return false;

        for (uint32_t i=0; i<pluginId; ++i)
        {
            const CarlaPluginPtr plugin = pData->plugins[i].plugin;

            if (plugin.get() == nullptr || ! plugin->isEnabled())
                return false;

            rindex += plugin->getParameterCount();
        }

        if (rindex >= kNumInParams)
            return false;

        return true;
    }

    CARLA_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(CarlaEngineNative)
};

// -----------------------------------------------------------------------

bool CarlaEngineNativeUI::msgReceived(const char* const msg) noexcept
{
    if (CarlaExternalUI::msgReceived(msg))
        return true;

    bool ok = true;

    if (std::strcmp(msg, "set_engine_option") == 0)
    {
        uint32_t option;
        int32_t value;
        const char* valueStr = nullptr;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(option), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsInt(value), true);
        readNextLineAsString(valueStr, false); // can be null

        try {
            fEngine->setOption(static_cast<EngineOption>(option), value, valueStr);
        } CARLA_SAFE_EXCEPTION("setOption");
    }
    else if (std::strcmp(msg, "clear_engine_xruns") == 0)
    {
        fEngine->clearXruns();
    }
    else if (std::strcmp(msg, "cancel_engine_action") == 0)
    {
        fEngine->setActionCanceled(true);
    }
    else if (std::strcmp(msg, "load_file") == 0)
    {
        const char* filename;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(filename, false), true);

        try {
            ok = fEngine->loadFile(filename);
        } CARLA_SAFE_EXCEPTION("loadFile");

        fEngine->reloadFromUI();
    }
    else if (std::strcmp(msg, "load_project") == 0)
    {
        const char* filename;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(filename, false), true);

        try {
            ok = fEngine->loadProject(filename, true);
        } CARLA_SAFE_EXCEPTION("loadProject");

        fEngine->reloadFromUI();
    }
    else if (std::strcmp(msg, "save_project") == 0)
    {
        const char* filename;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(filename, false), true);

        try {
            ok = fEngine->saveProject(filename, true);
        } CARLA_SAFE_EXCEPTION("saveProject");
    }
    else if (std::strcmp(msg, "clear_project_filename") == 0)
    {
        fEngine->clearCurrentProjectFilename();
    }
    else if (std::strcmp(msg, "patchbay_connect") == 0)
    {
        bool external;
        uint32_t groupA, portA, groupB, portB;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(external), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(groupA), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(portA), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(groupB), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(portB), true);

        try {
            ok = fEngine->patchbayConnect(external, groupA, portA, groupB, portB);
        } CARLA_SAFE_EXCEPTION("patchbayConnect");
    }
    else if (std::strcmp(msg, "patchbay_disconnect") == 0)
    {
        bool external;
        uint32_t connectionId;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(external), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(connectionId), true);

        try {
            ok = fEngine->patchbayDisconnect(external, connectionId);
        } CARLA_SAFE_EXCEPTION("patchbayDisconnect");
    }
    else if (std::strcmp(msg, "patchbay_set_group_pos") == 0)
    {
        bool external;
        uint32_t groupId;
        int x1, y1, x2, y2;
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(external), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(groupId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsInt(x1), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsInt(y1), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsInt(x2), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsInt(y2), true);

        try {
            ok = fEngine->patchbaySetGroupPos(false, true, external, groupId, x1, y1, x2, y2);
        } CARLA_SAFE_EXCEPTION("patchbaySetGroupPos");
    }
    else if (std::strcmp(msg, "patchbay_refresh") == 0)
    {
        bool external;
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(external), true);

        try {
            ok = fEngine->patchbayRefresh(true, false, external);
        } CARLA_SAFE_EXCEPTION("patchbayRefresh");
    }
    else if (std::strcmp(msg, "transport_play") == 0)
    {
        fEngine->transportPlay();
    }
    else if (std::strcmp(msg, "transport_pause") == 0)
    {
        fEngine->transportPause();
    }
    else if (std::strcmp(msg, "transport_bpm") == 0)
    {
        double bpm;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsDouble(bpm), true);

        fEngine->transportBPM(bpm);
    }
    else if (std::strcmp(msg, "transport_relocate") == 0)
    {
        uint64_t frame;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsULong(frame), true);

        fEngine->transportRelocate(frame);
    }
    else if (std::strcmp(msg, "add_plugin") == 0)
    {
        uint32_t btype, ptype;
        const char* filename = nullptr;
        const char* name;
        const char* label;
        int64_t uniqueId;
        uint options;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(btype), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(ptype), true);
        readNextLineAsString(filename, true); // can be null
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(name, true), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(label, true), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsLong(uniqueId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(options), true);

        if (filename != nullptr && std::strcmp(filename, "(null)") == 0)
        {
            delete[] filename;
            filename = nullptr;
        }

        if (std::strcmp(name, "(null)") == 0)
        {
            delete[] name;
            name = nullptr;
        }

        ok = fEngine->addPlugin(static_cast<BinaryType>(btype), static_cast<PluginType>(ptype),
                                filename, name, label, uniqueId, nullptr, options);

        if (filename != nullptr)
            delete[] filename;
        if (name != nullptr)
            delete[] name;
        delete[] label;

        fEngine->reloadFromUI();
    }
    else if (std::strcmp(msg, "remove_plugin") == 0)
    {
        uint32_t pluginId;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);

        ok = fEngine->removePlugin(pluginId);
        fEngine->reloadFromUI();
    }
    else if (std::strcmp(msg, "remove_all_plugins") == 0)
    {
        ok = fEngine->removeAllPlugins();
        fEngine->reloadFromUI();
    }
    else if (std::strcmp(msg, "rename_plugin") == 0)
    {
        uint32_t pluginId;
        const char* newName;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(newName, false), true);

        ok = fEngine->renamePlugin(pluginId, newName);
    }
    else if (std::strcmp(msg, "clone_plugin") == 0)
    {
        uint32_t pluginId;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);

        ok = fEngine->clonePlugin(pluginId);
        fEngine->reloadFromUI();
    }
    else if (std::strcmp(msg, "replace_plugin") == 0)
    {
        uint32_t pluginId;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);

        ok = fEngine->replacePlugin(pluginId);
    }
    else if (std::strcmp(msg, "switch_plugins") == 0)
    {
        uint32_t pluginIdA, pluginIdB;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginIdA), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginIdB), true);

        ok = fEngine->switchPlugins(pluginIdA, pluginIdB);
        fEngine->reloadFromUI();
    }
    else if (std::strcmp(msg, "load_plugin_state") == 0)
    {
        uint32_t pluginId;
        const char* filename;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(filename, false), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
        {
            plugin->loadStateFromFile(filename);
            _updateParamValues(plugin, pluginId, false, true);
        }
    }
    else if (std::strcmp(msg, "save_plugin_state") == 0)
    {
        uint32_t pluginId;
        const char* filename;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(filename, false), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->saveStateToFile(filename);
    }
    else if (std::strcmp(msg, "set_option") == 0)
    {
        uint32_t pluginId, option;
        bool yesNo;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(option), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(yesNo), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setOption(option, yesNo, false);
    }
    else if (std::strcmp(msg, "set_active") == 0)
    {
        uint32_t pluginId;
        bool onOff;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(onOff), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setActive(onOff, true, false);
    }
    else if (std::strcmp(msg, "set_drywet") == 0)
    {
        uint32_t pluginId;
        float value;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsFloat(value), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setDryWet(value, true, false);
    }
    else if (std::strcmp(msg, "set_volume") == 0)
    {
        uint32_t pluginId;
        float value;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsFloat(value), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setVolume(value, true, false);
    }
    else if (std::strcmp(msg, "set_balance_left") == 0)
    {
        uint32_t pluginId;
        float value;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsFloat(value), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setBalanceLeft(value, true, false);
    }
    else if (std::strcmp(msg, "set_balance_right") == 0)
    {
        uint32_t pluginId;
        float value;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsFloat(value), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setBalanceRight(value, true, false);
    }
    else if (std::strcmp(msg, "set_panning") == 0)
    {
        uint32_t pluginId;
        float value;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsFloat(value), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setPanning(value, true, false);
    }
    else if (std::strcmp(msg, "set_ctrl_channel") == 0)
    {
        uint32_t pluginId;
        int32_t channel;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsInt(channel), true);
        CARLA_SAFE_ASSERT_RETURN(channel >= -1 && channel < MAX_MIDI_CHANNELS, true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setCtrlChannel(int8_t(channel), true, false);
    }
    else if (std::strcmp(msg, "set_parameter_value") == 0)
    {
        uint32_t pluginId, parameterId;
        float value;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(parameterId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsFloat(value), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
        {
            plugin->setParameterValue(parameterId, value, true, true, false);
            fEngine->setParameterValueFromUI(pluginId, parameterId, value);
        }
    }
    else if (std::strcmp(msg, "set_parameter_midi_channel") == 0)
    {
        uint32_t pluginId, parameterId, channel;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(parameterId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(channel), true);
        CARLA_SAFE_ASSERT_RETURN(channel < MAX_MIDI_CHANNELS, true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setParameterMidiChannel(parameterId, static_cast<uint8_t>(channel), true, false);
    }
    else if (std::strcmp(msg, "set_parameter_mapped_control_index") == 0)
    {
        uint32_t pluginId, parameterId;
        int32_t ctrl;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(parameterId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsInt(ctrl), true);
        CARLA_SAFE_ASSERT_RETURN(ctrl >= CONTROL_INDEX_NONE && ctrl <= CONTROL_INDEX_MAX_ALLOWED, true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setParameterMappedControlIndex(parameterId, static_cast<int16_t>(ctrl), true, false, true);
    }
    else if (std::strcmp(msg, "set_parameter_mapped_range") == 0)
    {
        uint32_t pluginId, parameterId;
        float minimum, maximum;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(parameterId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsFloat(minimum), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsFloat(maximum), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setParameterMappedRange(parameterId, minimum, maximum, true, false);
    }
    else if (std::strcmp(msg, "set_parameter_touch") == 0)
    {
        uint32_t pluginId, parameterId;
        bool touching;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(parameterId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(touching), true);

        if (fEngine->getPlugin(pluginId))
            fEngine->setParameterTouchFromUI(pluginId, parameterId, touching);
    }
    else if (std::strcmp(msg, "set_program") == 0)
    {
        uint32_t pluginId;
        int32_t index;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsInt(index), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
        {
            plugin->setProgram(index, true, true, false);
            _updateParamValues(plugin, pluginId, true, true);
        }
    }
    else if (std::strcmp(msg, "set_midi_program") == 0)
    {
        uint32_t pluginId;
        int32_t index;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsInt(index), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
        {
            plugin->setMidiProgram(index, true, true, false);
            _updateParamValues(plugin, pluginId, true, true);
        }
    }
    else if (std::strcmp(msg, "set_custom_data") == 0)
    {
        uint32_t pluginId;
        const char* type;
        const char* key;
        const char* value;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(type, true), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(key, true), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(value, false), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->setCustomData(type, key, value, true);

        delete[] type;
        delete[] key;
    }
    else if (std::strcmp(msg, "set_chunk_data") == 0)
    {
        uint32_t pluginId;
        const char* cdata;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(cdata, false), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
        {
            std::vector<uint8_t> chunk(carla_getChunkFromBase64String(cdata));
#ifdef CARLA_PROPER_CPP11_SUPPORT
            plugin->setChunkData(chunk.data(), chunk.size());
#else
            plugin->setChunkData(&chunk.front(), chunk.size());
#endif
            _updateParamValues(plugin, pluginId, false, true);
        }
    }
    else if (std::strcmp(msg, "prepare_for_save") == 0)
    {
        uint32_t pluginId;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->prepareForSave(false);
    }
    else if (std::strcmp(msg, "reset_parameters") == 0)
    {
        uint32_t pluginId;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
        {
            plugin->resetParameters();
            _updateParamValues(plugin, pluginId, false, true);
        }
    }
    else if (std::strcmp(msg, "randomize_parameters") == 0)
    {
        uint32_t pluginId;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
        {
            plugin->randomizeParameters();
            _updateParamValues(plugin, pluginId, false, true);
        }
    }
    else if (std::strcmp(msg, "send_midi_note") == 0)
    {
        uint32_t pluginId, channel, note, velocity;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(channel), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(note), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(velocity), true);
        CARLA_SAFE_ASSERT_RETURN(channel < MAX_MIDI_CHANNELS, true);
        CARLA_SAFE_ASSERT_RETURN(note < MAX_MIDI_VALUE, true);
        CARLA_SAFE_ASSERT_RETURN(velocity < MAX_MIDI_VALUE, true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->sendMidiSingleNote(static_cast<uint8_t>(channel), static_cast<uint8_t>(note), static_cast<uint8_t>(velocity), true, true, false);
    }
    else if (std::strcmp(msg, "show_custom_ui") == 0)
    {
        uint32_t pluginId;
        bool yesNo;

        CARLA_SAFE_ASSERT_RETURN(readNextLineAsUInt(pluginId), true);
        CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(yesNo), true);

        if (const CarlaPluginPtr plugin = fEngine->getPlugin(pluginId))
            plugin->showCustomUI(yesNo);
    }
    else
    {
        carla_stderr("CarlaEngineNativeUI::msgReceived : %s", msg);
        return false;
    }

    if (! ok)
    {
        const CarlaMutexLocker cml(getPipeLock());

        if (writeMessage("error\n", 6) && writeAndFixMessage(fEngine->getLastError()))
            flushMessages();
    }

    return true;
}

void CarlaEngineNativeUI::_updateParamValues(const CarlaPluginPtr& plugin,
                                             const uint32_t pluginId,
                                             const bool sendCallback, const bool sendPluginHost) const noexcept
{
    float value;

    for (uint32_t i=0, count=plugin->getParameterCount(); i<count; ++i) {
        value = plugin->getParameterValue(i);

        if (sendCallback) {
            fEngine->callback(true, true,
                              ENGINE_CALLBACK_PARAMETER_VALUE_CHANGED,
                              pluginId,
                              static_cast<int>(i),
                              0, 0,
                              value,
                              nullptr);
        }

        if (sendPluginHost) {
            carla_stdout("_updateParamValues");
            fEngine->setParameterValueFromUI(pluginId, i, value);
        }
    }
}

// -----------------------------------------------------------------------

static const NativePluginDescriptor carlaRackDesc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 2,
    /* audioOuts */ 2,
    /* midiIns   */ 1,
    /* midiOuts  */ 1,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Rack",
    /* label     */ "carlarack",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiateRack,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 0,
    /* cvOuts */ 0,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

static const NativePluginDescriptor carlaRackNoMidiOutDesc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 2,
    /* audioOuts */ 2,
    /* midiIns   */ 1,
    /* midiOuts  */ 0,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Rack (no midi out)",
    /* label     */ "carlarack-nomidiout",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiateRackNoMidiOut,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 0,
    /* cvOuts */ 0,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

static const NativePluginDescriptor carlaPatchbayDesc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 2,
    /* audioOuts */ 2,
    /* midiIns   */ 1,
    /* midiOuts  */ 1,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Patchbay",
    /* label     */ "carlapatchbay",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiatePatchbay,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 0,
    /* cvOuts */ 0,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

static const NativePluginDescriptor carlaPatchbay3sDesc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 3,
    /* audioOuts */ 2,
    /* midiIns   */ 1,
    /* midiOuts  */ 1,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Patchbay (sidechain)",
    /* label     */ "carlapatchbay3s",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiatePatchbay3s,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 0,
    /* cvOuts */ 0,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

static const NativePluginDescriptor carlaPatchbay16Desc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 16,
    /* audioOuts */ 16,
    /* midiIns   */ 1,
    /* midiOuts  */ 1,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Patchbay (16chan)",
    /* label     */ "carlapatchbay16",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiatePatchbay16,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 0,
    /* cvOuts */ 0,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

static const NativePluginDescriptor carlaPatchbay32Desc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 32,
    /* audioOuts */ 32,
    /* midiIns   */ 1,
    /* midiOuts  */ 1,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Patchbay (32chan)",
    /* label     */ "carlapatchbay32",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiatePatchbay32,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 0,
    /* cvOuts */ 0,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

static const NativePluginDescriptor carlaPatchbay64Desc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 64,
    /* audioOuts */ 64,
    /* midiIns   */ 1,
    /* midiOuts  */ 1,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Patchbay (64chan)",
    /* label     */ "carlapatchbay64",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiatePatchbay64,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 0,
    /* cvOuts */ 0,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

static const NativePluginDescriptor carlaPatchbayCVDesc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_CONTROL_VOLTAGE
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 2,
    /* audioOuts */ 2,
    /* midiIns   */ 1,
    /* midiOuts  */ 1,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Patchbay (CV)",
    /* label     */ "carlapatchbaycv",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiatePatchbayCV,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 5,
    /* cvOuts */ 5,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

static const NativePluginDescriptor carlaPatchbayCV8Desc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_CONTROL_VOLTAGE
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 2,
    /* audioOuts */ 2,
    /* midiIns   */ 1,
    /* midiOuts  */ 1,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Patchbay (CV8)",
    /* label     */ "carlapatchbaycv",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiatePatchbayCV8,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 8,
    /* cvOuts */ 8,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

static const NativePluginDescriptor carlaPatchbayCV32Desc = {
    /* category  */ NATIVE_PLUGIN_CATEGORY_OTHER,
    /* hints     */ static_cast<NativePluginHints>(NATIVE_PLUGIN_IS_SYNTH
                                                  |NATIVE_PLUGIN_HAS_UI
                                                  |NATIVE_PLUGIN_NEEDS_UI_MAIN_THREAD
                                                  |NATIVE_PLUGIN_USES_CONTROL_VOLTAGE
                                                  |NATIVE_PLUGIN_USES_STATE
                                                  |NATIVE_PLUGIN_USES_TIME
                                                  |NATIVE_PLUGIN_USES_UI_SIZE),
    /* supports  */ static_cast<NativePluginSupports>(NATIVE_PLUGIN_SUPPORTS_EVERYTHING),
    /* audioIns  */ 64,
    /* audioOuts */ 64,
    /* midiIns   */ 1,
    /* midiOuts  */ 1,
    /* paramIns  */ kNumInParams,
    /* paramOuts */ kNumOutParams,
    /* name      */ "Carla-Patchbay (CV32)",
    /* label     */ "carlapatchbaycv",
    /* maker     */ "falkTX",
    /* copyright */ "GNU GPL v2+",
    CarlaEngineNative::_instantiatePatchbayCV32,
    CarlaEngineNative::_cleanup,
    CarlaEngineNative::_get_parameter_count,
    CarlaEngineNative::_get_parameter_info,
    CarlaEngineNative::_get_parameter_value,
    /* _get_midi_program_count */ nullptr,
    /* _get_midi_program_info  */ nullptr,
    CarlaEngineNative::_set_parameter_value,
    /* _set_midi_program       */ nullptr,
    /* _set_custom_data        */ nullptr,
    CarlaEngineNative::_ui_show,
    CarlaEngineNative::_ui_idle,
    CarlaEngineNative::_ui_set_parameter_value,
    /* _ui_set_midi_program    */ nullptr,
    /* _ui_set_custom_data     */ nullptr,
    CarlaEngineNative::_activate,
    CarlaEngineNative::_deactivate,
    CarlaEngineNative::_process,
    CarlaEngineNative::_get_state,
    CarlaEngineNative::_set_state,
    CarlaEngineNative::_dispatcher,
    /* _render_inline_dsplay */ nullptr,
    /* cvIns  */ 32,
    /* cvOuts */ 32,
    /* _get_buffer_port_name */ nullptr,
    /* _get_buffer_port_range */ nullptr,
    /* ui_width   */ kUiWidth,
    /* ui_height  */ kUiHeight
};

CARLA_BACKEND_END_NAMESPACE

// -----------------------------------------------------------------------

CARLA_API_EXPORT
void carla_register_native_plugin_carla();

void carla_register_native_plugin_carla()
{
    CARLA_BACKEND_USE_NAMESPACE;
    carla_register_native_plugin(&carlaRackDesc);
    carla_register_native_plugin(&carlaRackNoMidiOutDesc);
    carla_register_native_plugin(&carlaPatchbayDesc);
    carla_register_native_plugin(&carlaPatchbay3sDesc);
    carla_register_native_plugin(&carlaPatchbay16Desc);
    carla_register_native_plugin(&carlaPatchbay32Desc);
    carla_register_native_plugin(&carlaPatchbay64Desc);
    carla_register_native_plugin(&carlaPatchbayCVDesc);
}

// -----------------------------------------------------------------------

const NativePluginDescriptor* carla_get_native_rack_plugin()
{
    CARLA_BACKEND_USE_NAMESPACE;
    return &carlaRackDesc;
}

const NativePluginDescriptor* carla_get_native_patchbay_plugin()
{
    CARLA_BACKEND_USE_NAMESPACE;
    return &carlaPatchbayDesc;
}

const NativePluginDescriptor* carla_get_native_patchbay16_plugin()
{
    CARLA_BACKEND_USE_NAMESPACE;
    return &carlaPatchbay16Desc;
}

const NativePluginDescriptor* carla_get_native_patchbay32_plugin()
{
    CARLA_BACKEND_USE_NAMESPACE;
    return &carlaPatchbay32Desc;
}

const NativePluginDescriptor* carla_get_native_patchbay64_plugin()
{
    CARLA_BACKEND_USE_NAMESPACE;
    return &carlaPatchbay64Desc;
}

const NativePluginDescriptor* carla_get_native_patchbay_cv_plugin()
{
    CARLA_BACKEND_USE_NAMESPACE;
    return &carlaPatchbayCVDesc;
}

const NativePluginDescriptor* carla_get_native_patchbay_cv8_plugin()
{
    CARLA_BACKEND_USE_NAMESPACE;
    return &carlaPatchbayCV8Desc;
}

const NativePluginDescriptor* carla_get_native_patchbay_cv32_plugin()
{
    CARLA_BACKEND_USE_NAMESPACE;
    return &carlaPatchbayCV32Desc;
}

// -----------------------------------------------------------------------
// Extra stuff for linking purposes

#ifdef CARLA_PLUGIN_BUILD

CARLA_BACKEND_START_NAMESPACE

namespace EngineInit {

CarlaEngine* newJack() { return nullptr; }

#ifdef USING_JUCE_AUDIO_DEVICES
CarlaEngine*       newJuce(const AudioApi)           { return nullptr; }
uint               getJuceApiCount()                 { return 0;       }
const char*        getJuceApiName(const uint)        { return nullptr; }
const char* const* getJuceApiDeviceNames(const uint) { return nullptr; }
const EngineDriverDeviceInfo* getJuceDeviceInfo(const uint, const char* const) { return nullptr; }
bool               showJuceDeviceControlPanel(const uint, const char* const)   { return false; }
#endif

#ifdef USING_RTAUDIO
CarlaEngine*       newRtAudio(const AudioApi)           { return nullptr; }
uint               getRtAudioApiCount()                 { return 0;       }
const char*        getRtAudioApiName(const uint)        { return nullptr; }
const char* const* getRtAudioApiDeviceNames(const uint) { return nullptr; }
const EngineDriverDeviceInfo* getRtAudioDeviceInfo(const uint, const char* const) { return nullptr; }
#endif

}

CARLA_BACKEND_END_NAMESPACE

#define CARLA_PLUGIN_UI_CLASS_PREFIX Plugin
#include "CarlaPluginUI.cpp"
# undef CARLA_PLUGIN_UI_CLASS_PREFIX
#include "CarlaDssiUtils.cpp"
#include "CarlaMacUtils.cpp"
#include "CarlaPatchbayUtils.cpp"
#include "CarlaPipeUtils.cpp"
#include "CarlaProcessUtils.cpp"
#include "CarlaStateUtils.cpp"

#endif /* CARLA_PLUGIN_BUILD */

// -----------------------------------------------------------------------