Carla/source/backend/plugin/CarlaPluginBridge.cpp

/*
 * Carla Plugin Bridge
 * Copyright (C) 2011-2024 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 "CarlaPluginInternal.hpp"

#include "CarlaBackendUtils.hpp"
#include "CarlaBase64Utils.hpp"
#include "CarlaBridgeUtils.hpp"
#include "CarlaEngineUtils.hpp"
#include "CarlaMathUtils.hpp"
#include "CarlaPipeUtils.hpp"
#include "CarlaScopeUtils.hpp"
#include "CarlaShmUtils.hpp"
#include "CarlaTimeUtils.hpp"
#include "CarlaThread.hpp"

#include "jackbridge/JackBridge.hpp"

#include <ctime>

#include "water/files/File.h"
#include "water/misc/Time.h"
#include "water/threads/ChildProcess.h"

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

using water::ChildProcess;
using water::File;
using water::String;
using water::StringArray;

CARLA_BACKEND_START_NAMESPACE

// --------------------------------------------------------------------------------------------------------------------
// Fallback data

static const ExternalMidiNote kExternalMidiNoteFallback = { -1, 0, 0 };

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

#ifndef CARLA_OS_WIN
static String findWinePrefix(const String filename, const int recursionLimit = 10)
{
    if (recursionLimit == 0 || filename.length() < 5 || ! filename.contains("/"))
        return "";

    const String path(filename.upToLastOccurrenceOf("/", false, false));

    if (File(String(path + "/dosdevices").toRawUTF8()).isDirectory())
        return path;

    return findWinePrefix(path, recursionLimit-1);
}
#endif

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

struct BridgeParamInfo {
    float value;
    CarlaString name;
    CarlaString symbol;
    CarlaString unit;

    BridgeParamInfo() noexcept
        : value(0.0f),
          name(),
          symbol(),
          unit() {}

    CARLA_DECLARE_NON_COPYABLE(BridgeParamInfo)
};

struct BridgeTextReader {
    char* text;

    BridgeTextReader(BridgeNonRtServerControl& nonRtServerCtrl)
        : text(nullptr)
    {
        const uint32_t size = nonRtServerCtrl.readUInt();
        CARLA_SAFE_ASSERT_RETURN(size != 0,);

        text = new char[size + 1];
        nonRtServerCtrl.readCustomData(text, size);
        text[size] = '\0';
    }

    BridgeTextReader(BridgeNonRtServerControl& nonRtServerCtrl, const uint32_t size)
        : text(nullptr)
    {
        text = new char[size + 1];

        if (size != 0)
            nonRtServerCtrl.readCustomData(text, size);

        text[size] = '\0';
    }

    ~BridgeTextReader() noexcept
    {
        delete[] text;
    }

    CARLA_DECLARE_NON_COPYABLE(BridgeTextReader)
};

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

class CarlaPluginBridgeThread : public CarlaThread
{
public:
    CarlaPluginBridgeThread(CarlaEngine* const engine, CarlaPlugin* const plugin) noexcept
        : CarlaThread("CarlaPluginBridgeThread"),
          kEngine(engine),
          kPlugin(plugin),
          fBinaryArchName(),
          fBridgeBinary(),
          fLabel(),
          fShmIds(),
         #ifndef CARLA_OS_WIN
          fWinePrefix(),
         #endif
          fProcess() {}

    void setData(
                #ifndef CARLA_OS_WIN
                 const char* const winePrefix,
                #endif
                 const char* const binaryArchName,
                 const char* const bridgeBinary,
                 const char* const label,
                 const char* const shmIds) noexcept
    {
        CARLA_SAFE_ASSERT_RETURN(bridgeBinary != nullptr && bridgeBinary[0] != '\0',);
        CARLA_SAFE_ASSERT_RETURN(shmIds != nullptr && shmIds[0] != '\0',);
        CARLA_SAFE_ASSERT(! isThreadRunning());

       #ifndef CARLA_OS_WIN
        fWinePrefix = winePrefix;
       #endif
        fBinaryArchName = binaryArchName;
        fBridgeBinary = bridgeBinary;
        fShmIds = shmIds;

        if (label != nullptr)
            fLabel = label;
        if (fLabel.isEmpty())
            fLabel = "(none)";
    }

    uintptr_t getProcessPID() const noexcept
    {
        CARLA_SAFE_ASSERT_RETURN(fProcess != nullptr, 0);

        return (uintptr_t)fProcess->getPID();
    }

protected:
    void run()
    {
        if (fProcess == nullptr)
        {
            fProcess = new ChildProcess();
        }
        else if (fProcess->isRunning())
        {
            carla_stderr("CarlaPluginBridgeThread::run() - already running");
        }

        char strBuf[STR_MAX+1];
        strBuf[STR_MAX] = '\0';

        const EngineOptions& options(kEngine->getOptions());

        String filename(kPlugin->getFilename());

        if (filename.isEmpty())
            filename = "(none)";

        StringArray arguments;

       #ifndef CARLA_OS_WIN
        // start with "wine" if needed
        if (fBridgeBinary.endsWithIgnoreCase(".exe"))
        {
            String wineCMD;

            if (options.wine.executable != nullptr && options.wine.executable[0] != '\0')
            {
                wineCMD = options.wine.executable;

                if (fBridgeBinary.endsWithIgnoreCase("64.exe")
                    && options.wine.executable[0] == CARLA_OS_SEP
                    && File(String(wineCMD + "64").toRawUTF8()).existsAsFile())
                    wineCMD += "64";
            }
            else
            {
                wineCMD = "wine";
            }

            arguments.add(wineCMD);
        }
       #endif

        // setup binary arch
        ChildProcess::Type childType;
#ifdef CARLA_OS_MAC
        if (fBinaryArchName == "arm64")
            childType = ChildProcess::TypeARM;
        else if (fBinaryArchName == "x86_64")
            childType = ChildProcess::TypeIntel;
        else
#endif
            childType = ChildProcess::TypeAny;

        // bridge binary
        arguments.add(fBridgeBinary);

        // plugin type
        arguments.add(getPluginTypeAsString(kPlugin->getType()));

        // filename
        arguments.add(filename);

        // label
        arguments.add(fLabel);

        // uniqueId
        arguments.add(String(static_cast<water::int64>(kPlugin->getUniqueId())));

        bool started;

        {
            const ScopedEngineEnvironmentLocker _seel(kEngine);

           #ifdef CARLA_OS_LINUX
            const CarlaScopedEnvVar sev1("LD_LIBRARY_PATH", nullptr);
            const CarlaScopedEnvVar sev2("LD_PRELOAD", nullptr);
           #endif

            carla_setenv("ENGINE_OPTION_FORCE_STEREO",          bool2str(options.forceStereo));
            carla_setenv("ENGINE_OPTION_PREFER_PLUGIN_BRIDGES", bool2str(options.preferPluginBridges));
            carla_setenv("ENGINE_OPTION_PREFER_UI_BRIDGES",     bool2str(options.preferUiBridges));
            carla_setenv("ENGINE_OPTION_UIS_ALWAYS_ON_TOP",     bool2str(options.uisAlwaysOnTop));

            std::snprintf(strBuf, STR_MAX, "%u", options.maxParameters);
            carla_setenv("ENGINE_OPTION_MAX_PARAMETERS", strBuf);

            std::snprintf(strBuf, STR_MAX, "%u", options.uiBridgesTimeout);
            carla_setenv("ENGINE_OPTION_UI_BRIDGES_TIMEOUT",strBuf);

            if (options.pathLADSPA != nullptr)
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_LADSPA", options.pathLADSPA);
            else
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_LADSPA", "");

            if (options.pathDSSI != nullptr)
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_DSSI", options.pathDSSI);
            else
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_DSSI", "");

            if (options.pathLV2 != nullptr)
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_LV2", options.pathLV2);
            else
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_LV2", "");

            if (options.pathVST2 != nullptr)
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_VST2", options.pathVST2);
            else
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_VST2", "");

            if (options.pathVST3 != nullptr)
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_VST3", options.pathVST3);
            else
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_VST3", "");

            if (options.pathSF2 != nullptr)
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_SF2", options.pathSF2);
            else
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_SF2", "");

            if (options.pathSFZ != nullptr)
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_SFZ", options.pathSFZ);
            else
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_SFZ", "");

            if (options.pathJSFX != nullptr)
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_JSFX", options.pathJSFX);
            else
                carla_setenv("ENGINE_OPTION_PLUGIN_PATH_JSFX", "");

            if (options.binaryDir != nullptr)
                carla_setenv("ENGINE_OPTION_PATH_BINARIES", options.binaryDir);
            else
                carla_setenv("ENGINE_OPTION_PATH_BINARIES", "");

            if (options.resourceDir != nullptr)
                carla_setenv("ENGINE_OPTION_PATH_RESOURCES", options.resourceDir);
            else
                carla_setenv("ENGINE_OPTION_PATH_RESOURCES", "");

            carla_setenv("ENGINE_OPTION_PREVENT_BAD_BEHAVIOUR", bool2str(options.preventBadBehaviour));

            std::snprintf(strBuf, STR_MAX, P_UINTPTR, options.frontendWinId);
            carla_setenv("ENGINE_OPTION_FRONTEND_WIN_ID", strBuf);

            carla_setenv("ENGINE_BRIDGE_SHM_IDS", fShmIds.toRawUTF8());

           #ifndef CARLA_OS_WIN
            if (fWinePrefix.isNotEmpty())
            {
                carla_setenv("WINEDEBUG", "-all");
                carla_setenv("WINEPREFIX", fWinePrefix.buffer());

                if (options.wine.rtPrio)
                {
                    carla_setenv("STAGING_SHARED_MEMORY", "1");
                    carla_setenv("WINE_RT_POLICY", "FF");

                    std::snprintf(strBuf, STR_MAX, "%i", options.wine.baseRtPrio);
                    carla_setenv("STAGING_RT_PRIORITY_BASE", strBuf);
                    carla_setenv("WINE_RT", strBuf);
                    carla_setenv("WINE_RT_PRIO", strBuf);

                    std::snprintf(strBuf, STR_MAX, "%i", options.wine.serverRtPrio);
                    carla_setenv("STAGING_RT_PRIORITY_SERVER", strBuf);
                    carla_setenv("WINE_SVR_RT", strBuf);

                    carla_stdout("Using WINEPREFIX '%s', with base RT prio %i and server RT prio %i",
                                 fWinePrefix.buffer(), options.wine.baseRtPrio, options.wine.serverRtPrio);
                }
                else
                {
                    carla_unsetenv("STAGING_SHARED_MEMORY");
                    carla_unsetenv("WINE_RT_POLICY");
                    carla_unsetenv("STAGING_RT_PRIORITY_BASE");
                    carla_unsetenv("STAGING_RT_PRIORITY_SERVER");
                    carla_unsetenv("WINE_RT");
                    carla_unsetenv("WINE_RT_PRIO");
                    carla_unsetenv("WINE_SVR_RT");

                    carla_stdout("Using WINEPREFIX '%s', without RT priorities", fWinePrefix.buffer());
                }
            }
           #endif

            carla_stdout("Starting plugin bridge, command is:\n%s \"%s\" \"%s\" \"%s\" " P_INT64,
                         fBridgeBinary.toRawUTF8(), getPluginTypeAsString(kPlugin->getType()), filename.toRawUTF8(), fLabel.toRawUTF8(), kPlugin->getUniqueId());

           #ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
            const File projFolder(kEngine->getCurrentProjectFolder());

            if (projFolder.isNotNull())
            {
                const File oldFolder(File::getCurrentWorkingDirectory());
                projFolder.setAsCurrentWorkingDirectory();
                started = fProcess->start(arguments, childType);
                oldFolder.setAsCurrentWorkingDirectory();
            }
            else
           #endif
            {
                started = fProcess->start(arguments, childType);
            }
        }

        if (! started)
        {
            carla_stdout("failed!");
            fProcess = nullptr;
            return;
        }

        for (; fProcess->isRunning() && ! shouldThreadExit();)
            carla_sleep(1);

        // we only get here if bridge crashed or thread asked to exit
        if (fProcess->isRunning() && shouldThreadExit())
        {
            fProcess->waitForProcessToFinish(2000);

            if (fProcess->isRunning())
            {
                carla_stdout("CarlaPluginBridgeThread::run() - bridge refused to close, force kill now");
                fProcess->kill();
            }
            else
            {
                carla_stdout("CarlaPluginBridgeThread::run() - bridge auto-closed successfully");
            }
        }
        else
        {
            // forced quit, may have crashed
            if (fProcess->getExitCodeAndClearPID() != 0)
            {
                carla_stderr("CarlaPluginBridgeThread::run() - bridge crashed");

                CarlaString errorString("Plugin '" + CarlaString(kPlugin->getName()) + "' has crashed!\n"
                                        "Saving now will lose its current settings.\n"
                                        "Please remove this plugin, and not rely on it from this point.");
                kEngine->callback(true, true,
                                  ENGINE_CALLBACK_ERROR, kPlugin->getId(), 0, 0, 0, 0.0f, errorString);
            }
        }

        fProcess = nullptr;
    }

private:
    CarlaEngine* const kEngine;
    CarlaPlugin* const kPlugin;

    String fBinaryArchName;
    String fBridgeBinary;
    String fLabel;
    String fShmIds;
   #ifndef CARLA_OS_WIN
    CarlaString fWinePrefix;
   #endif

    CarlaScopedPointer<ChildProcess> fProcess;

    CARLA_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(CarlaPluginBridgeThread)
};

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

class CarlaPluginBridge : public CarlaPlugin
{
public:
    CarlaPluginBridge(CarlaEngine* const engine, const uint id, const BinaryType btype, const PluginType ptype)
        : CarlaPlugin(engine, id),
          fBinaryType(btype),
          fPluginType(ptype),
          fBridgeVersion(6), // before kPluginBridgeNonRtServerVersion was a thing, API was at 6
          fInitiated(false),
          fInitError(false),
          fSaved(true),
          fTimedOut(false),
          fTimedError(false),
          fBufferSize(engine->getBufferSize()),
          fProcWaitTime(0),
          fPendingEmbedCustomUI(0),
          fBridgeBinary(),
          fBridgeThread(engine, this),
          fShmAudioPool(),
          fShmRtClientControl(),
          fShmNonRtClientControl(),
          fShmNonRtServerControl(),
         #ifndef CARLA_OS_WIN
          fWinePrefix(),
         #endif
          fReceivingParamText(),
          fInfo(),
          fUniqueId(0),
          fLatency(0),
          fParams(nullptr)
    {
        carla_debug("CarlaPluginBridge::CarlaPluginBridge(%p, %i, %s, %s)", engine, id, BinaryType2Str(btype), PluginType2Str(ptype));

        pData->hints |= PLUGIN_IS_BRIDGE;
    }

    ~CarlaPluginBridge() override
    {
        carla_debug("CarlaPluginBridge::~CarlaPluginBridge()");

       #ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
        // close UI
        if (pData->hints & PLUGIN_HAS_CUSTOM_UI)
            pData->transientTryCounter = 0;
       #endif

        pData->singleMutex.lock();
        pData->masterMutex.lock();

        if (pData->client != nullptr && pData->client->isActive())
            pData->client->deactivate(true);

        if (pData->active)
        {
            deactivate();
            pData->active = false;
        }

        if (fBridgeThread.isThreadRunning())
        {
            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientQuit);
            fShmNonRtClientControl.commitWrite();

            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientQuit);
            fShmRtClientControl.commitWrite();

            if (! fTimedOut)
                waitForClient("stopping", 3000);
        }

        fBridgeThread.stopThread(3000);

        fShmNonRtServerControl.clear();
        fShmNonRtClientControl.clear();
        fShmRtClientControl.clear();
        fShmAudioPool.clear();

        clearBuffers();

        fInfo.chunk.clear();
    }

    // -------------------------------------------------------------------
    // Information (base)

    BinaryType getBinaryType() const noexcept override
    {
        return fBinaryType;
    }

    PluginType getType() const noexcept override
    {
        return fPluginType;
    }

    PluginCategory getCategory() const noexcept override
    {
        return fInfo.category;
    }

    int64_t getUniqueId() const noexcept override
    {
        return fUniqueId;
    }

    uint32_t getLatencyInFrames() const noexcept override
    {
        return fLatency;
    }

    // -------------------------------------------------------------------
    // Information (count)

    uint32_t getMidiInCount() const noexcept override
    {
        return fInfo.mIns;
    }

    uint32_t getMidiOutCount() const noexcept override
    {
        return fInfo.mOuts;
    }

    // -------------------------------------------------------------------
    // Information (current data)

    std::size_t getChunkData(void** const dataPtr) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(pData->options & PLUGIN_OPTION_USE_CHUNKS, 0);
        CARLA_SAFE_ASSERT_RETURN(dataPtr != nullptr, 0);

        waitForSaved();

        CARLA_SAFE_ASSERT_RETURN(fInfo.chunk.size() > 0, 0);

#ifdef CARLA_PROPER_CPP11_SUPPORT
        *dataPtr = fInfo.chunk.data();
#else
        *dataPtr = &fInfo.chunk.front();
#endif
        return fInfo.chunk.size();
    }

    // -------------------------------------------------------------------
    // Information (per-plugin data)

    uint getOptionsAvailable() const noexcept override
    {
        return fInfo.optionsAvailable;
    }

    float getParameterValue(const uint32_t parameterId) const noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count, 0.0f);

        return fParams[parameterId].value;
    }

    bool getLabel(char* const strBuf) const noexcept override
    {
        std::strncpy(strBuf, fInfo.label, STR_MAX);
        return true;
    }

    bool getMaker(char* const strBuf) const noexcept override
    {
        std::strncpy(strBuf, fInfo.maker, STR_MAX);
        return true;
    }

    bool getCopyright(char* const strBuf) const noexcept override
    {
        std::strncpy(strBuf, fInfo.copyright, STR_MAX);
        return true;
    }

    bool getRealName(char* const strBuf) const noexcept override
    {
        std::strncpy(strBuf, fInfo.name, STR_MAX);
        return true;
    }

    bool getParameterName(const uint32_t parameterId, char* const strBuf) const noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count, false);

        std::strncpy(strBuf, fParams[parameterId].name.buffer(), STR_MAX);
        return true;
    }

    bool getParameterText(const uint32_t parameterId, char* const strBuf) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count, false);
        CARLA_SAFE_ASSERT_RETURN(! fReceivingParamText.isCurrentlyWaitingData(), false);

        const int32_t parameterIdi = static_cast<int32_t>(parameterId);
        fReceivingParamText.setTargetData(parameterIdi, strBuf);

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientGetParameterText);
            fShmNonRtClientControl.writeInt(parameterIdi);
            fShmNonRtClientControl.commitWrite();
        }

        if (waitForParameterText())
            return true;

        std::snprintf(strBuf, STR_MAX, "%.12g", static_cast<double>(fParams[parameterId].value));
        return false;
    }

    bool getParameterSymbol(const uint32_t parameterId, char* const strBuf) const noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count, false);

        std::strncpy(strBuf, fParams[parameterId].symbol.buffer(), STR_MAX);
        return true;
    }

    bool getParameterUnit(const uint32_t parameterId, char* const strBuf) const noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count, false);

        std::strncpy(strBuf, fParams[parameterId].unit.buffer(), STR_MAX);
        return true;
    }

    // -------------------------------------------------------------------
    // Set data (state)

    void prepareForSave(bool) noexcept override
    {
        fSaved = false;

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientPrepareForSave);
            fShmNonRtClientControl.commitWrite();
        }
    }

    bool waitForParameterText()
    {
        bool success;
        if (fReceivingParamText.wasDataReceived(&success))
            return success;

        const uint32_t timeoutEnd = carla_gettime_ms() + 500; // 500 ms
        const bool needsEngineIdle = pData->engine->getType() != kEngineTypePlugin;

        for (; carla_gettime_ms() < timeoutEnd && fBridgeThread.isThreadRunning();)
        {
            if (fReceivingParamText.wasDataReceived(&success))
                return success;

            if (needsEngineIdle)
                pData->engine->idle();

            carla_msleep(5);
        }

        if (! fBridgeThread.isThreadRunning())
        {
            carla_stderr("CarlaPluginBridge::waitForParameterText() - Bridge is not running");
            return false;
        }

        carla_stderr("CarlaPluginBridge::waitForParameterText() - Timeout while requesting text");
        return false;
    }

    void waitForSaved()
    {
        if (fSaved)
            return;

        // TODO: only wait 1 minute for NI plugins
        const uint32_t timeoutEnd = carla_gettime_ms() + 60*1000; // 60 secs, 1 minute
        const bool needsEngineIdle = pData->engine->getType() != kEngineTypePlugin;

        for (; carla_gettime_ms() < timeoutEnd && fBridgeThread.isThreadRunning();)
        {
            pData->engine->callback(true, true, ENGINE_CALLBACK_IDLE, 0, 0, 0, 0, 0.0f, nullptr);

            if (needsEngineIdle)
                pData->engine->idle();

            if (fSaved)
                break;

            carla_msleep(20);
        }

        if (! fBridgeThread.isThreadRunning())
            return carla_stderr("CarlaPluginBridge::waitForSaved() - Bridge is not running");
        if (! fSaved)
            return carla_stderr("CarlaPluginBridge::waitForSaved() - Timeout while requesting save state");
    }

    // -------------------------------------------------------------------
    // Set data (internal stuff)

    void setOption(const uint option, const bool yesNo, const bool sendCallback) override
    {
        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetOption);
            fShmNonRtClientControl.writeUInt(option);
            fShmNonRtClientControl.writeBool(yesNo);
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setOption(option, yesNo, sendCallback);
    }

    void setCtrlChannel(const int8_t channel, const bool sendOsc, const bool sendCallback) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(sendOsc || sendCallback,);

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetCtrlChannel);
            fShmNonRtClientControl.writeShort(channel);
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setCtrlChannel(channel, sendOsc, sendCallback);
    }

    void setName(const char* const newName) override
    {
        CarlaPlugin::setName(newName);

        if (pData->uiTitle.isEmpty() && fBridgeVersion >= 8)
            _setUiTitleFromName();
    }

    // -------------------------------------------------------------------
    // Set data (plugin-specific stuff)

    void setParameterValue(const uint32_t parameterId, const float value, const bool sendGui, const bool sendOsc, const bool sendCallback) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count,);
        CARLA_SAFE_ASSERT_RETURN(sendGui || sendOsc || sendCallback,);

        const float fixedValue(pData->param.getFixedValue(parameterId, value));
        fParams[parameterId].value = fixedValue;

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetParameterValue);
            fShmNonRtClientControl.writeUInt(parameterId);
            fShmNonRtClientControl.writeFloat(value);
            fShmNonRtClientControl.commitWrite();
            fShmNonRtClientControl.waitIfDataIsReachingLimit();
        }

        CarlaPlugin::setParameterValue(parameterId, fixedValue, sendGui, sendOsc, sendCallback);
    }

    void setParameterValueRT(const uint32_t parameterId, const float value, const uint32_t frameOffset, const bool sendCallbackLater) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count,);

        const float fixedValue(pData->param.getFixedValue(parameterId, value));
        fParams[parameterId].value = fixedValue;

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetParameterValue);
            fShmNonRtClientControl.writeUInt(parameterId);
            fShmNonRtClientControl.writeFloat(value);
            fShmNonRtClientControl.commitWrite();
            fShmNonRtClientControl.waitIfDataIsReachingLimit();
        }

        CarlaPlugin::setParameterValueRT(parameterId, fixedValue, frameOffset, sendCallbackLater);
    }

    void setParameterMidiChannel(const uint32_t parameterId, const uint8_t channel, const bool sendOsc, const bool sendCallback) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count,);
        CARLA_SAFE_ASSERT_RETURN(channel < MAX_MIDI_CHANNELS,);
        CARLA_SAFE_ASSERT_RETURN(sendOsc || sendCallback,);

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetParameterMidiChannel);
            fShmNonRtClientControl.writeUInt(parameterId);
            fShmNonRtClientControl.writeByte(channel);
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setParameterMidiChannel(parameterId, channel, sendOsc, sendCallback);
    }

    void setParameterMappedControlIndex(const uint32_t parameterId, const int16_t index,
                                        const bool sendOsc, const bool sendCallback,
                                        const bool reconfigureNow) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count,);
        CARLA_SAFE_ASSERT_RETURN(index >= CONTROL_INDEX_NONE && index <= CONTROL_INDEX_MAX_ALLOWED,);
        CARLA_SAFE_ASSERT_RETURN(sendOsc || sendCallback,);

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetParameterMappedControlIndex);
            fShmNonRtClientControl.writeUInt(parameterId);
            fShmNonRtClientControl.writeShort(index);
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setParameterMappedControlIndex(parameterId, index, sendOsc, sendCallback, reconfigureNow);
    }

    void setParameterMappedRange(const uint32_t parameterId, const float minimum, const float maximum, const bool sendOsc, const bool sendCallback) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(parameterId < pData->param.count,);
        CARLA_SAFE_ASSERT_RETURN(sendOsc || sendCallback,);

        // kPluginBridgeNonRtClientSetParameterMappedRange was added in API 7
        if (fBridgeVersion >= 7)
        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetParameterMappedRange);
            fShmNonRtClientControl.writeUInt(parameterId);
            fShmNonRtClientControl.writeFloat(minimum);
            fShmNonRtClientControl.writeFloat(maximum);
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setParameterMappedRange(parameterId, minimum, maximum, sendOsc, sendCallback);
    }

    void setProgram(const int32_t index, const bool sendGui, const bool sendOsc, const bool sendCallback, const bool doingInit) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(index >= -1 && index < static_cast<int32_t>(pData->prog.count),);
        CARLA_SAFE_ASSERT_RETURN(sendGui || sendOsc || sendCallback || doingInit,);

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetProgram);
            fShmNonRtClientControl.writeInt(index);
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setProgram(index, sendGui, sendOsc, sendCallback, doingInit);
    }

    void setProgramRT(const uint32_t index, const bool sendCallbackLater) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(index < pData->prog.count,);

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetProgram);
            fShmNonRtClientControl.writeInt(static_cast<int32_t>(index));
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setProgramRT(index, sendCallbackLater);
    }

    void setMidiProgram(const int32_t index, const bool sendGui, const bool sendOsc, const bool sendCallback, const bool doingInit) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(index >= -1 && index < static_cast<int32_t>(pData->midiprog.count),);
        CARLA_SAFE_ASSERT_RETURN(sendGui || sendOsc || sendCallback || doingInit,);

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetMidiProgram);
            fShmNonRtClientControl.writeInt(index);
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setMidiProgram(index, sendGui, sendOsc, sendCallback, doingInit);
    }

    void setMidiProgramRT(const uint32_t uindex, const bool sendCallbackLater) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(uindex < pData->midiprog.count,);

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetMidiProgram);
            fShmNonRtClientControl.writeInt(static_cast<int32_t>(uindex));
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setMidiProgramRT(uindex, sendCallbackLater);
    }

    void setCustomData(const char* const type, const char* const key, const char* const value, const bool sendGui) override
    {
        CARLA_SAFE_ASSERT_RETURN(type != nullptr && type[0] != '\0',);
        CARLA_SAFE_ASSERT_RETURN(key != nullptr && key[0] != '\0',);
        CARLA_SAFE_ASSERT_RETURN(value != nullptr,);

        if (std::strcmp(type, CUSTOM_DATA_TYPE_PROPERTY) == 0)
            return CarlaPlugin::setCustomData(type, key, value, sendGui);

        if (std::strcmp(type, CUSTOM_DATA_TYPE_STRING) == 0 && std::strcmp(key, "__CarlaPingOnOff__") == 0)
        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientPingOnOff);
            fShmNonRtClientControl.writeBool(std::strcmp(value, "true") == 0);
            fShmNonRtClientControl.commitWrite();
            return;
        }

        const uint32_t maxLocalValueLen = fBridgeVersion >= 10 ? 4096 : 16384;

        const uint32_t typeLen  = static_cast<uint32_t>(std::strlen(type));
        const uint32_t keyLen   = static_cast<uint32_t>(std::strlen(key));
        const uint32_t valueLen = static_cast<uint32_t>(std::strlen(value));

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            if (valueLen > maxLocalValueLen)
                fShmNonRtClientControl.waitIfDataIsReachingLimit();

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetCustomData);

            fShmNonRtClientControl.writeUInt(typeLen);
            fShmNonRtClientControl.writeCustomData(type, typeLen);

            fShmNonRtClientControl.writeUInt(keyLen);
            fShmNonRtClientControl.writeCustomData(key, keyLen);

            fShmNonRtClientControl.writeUInt(valueLen);

            if (valueLen > 0)
            {
                if (valueLen > maxLocalValueLen)
                {
                    String filePath(File::getSpecialLocation(File::tempDirectory).getFullPathName());

                    filePath += CARLA_OS_SEP_STR ".CarlaCustomData_";
                    filePath += fShmAudioPool.getFilenameSuffix();

                    if (File(filePath.toRawUTF8()).replaceWithText(value))
                    {
                        const uint32_t ulength = static_cast<uint32_t>(filePath.length());

                        fShmNonRtClientControl.writeUInt(ulength);
                        fShmNonRtClientControl.writeCustomData(filePath.toRawUTF8(), ulength);
                    }
                    else
                    {
                        fShmNonRtClientControl.writeUInt(0);
                    }
                }
                else
                {
                    fShmNonRtClientControl.writeCustomData(value, valueLen);
                }
            }

            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setCustomData(type, key, value, sendGui);
    }

    void setChunkData(const void* const data, const std::size_t dataSize) override
    {
        CARLA_SAFE_ASSERT_RETURN(pData->options & PLUGIN_OPTION_USE_CHUNKS,);
        CARLA_SAFE_ASSERT_RETURN(data != nullptr,);
        CARLA_SAFE_ASSERT_RETURN(dataSize > 0,);

        CarlaString dataBase64(CarlaString::asBase64(data, dataSize));
        CARLA_SAFE_ASSERT_RETURN(dataBase64.length() > 0,);

        String filePath(File::getSpecialLocation(File::tempDirectory).getFullPathName());

        filePath += CARLA_OS_SEP_STR ".CarlaChunk_";
        filePath += fShmAudioPool.getFilenameSuffix();

        if (File(filePath.toRawUTF8()).replaceWithText(dataBase64.buffer()))
        {
            const uint32_t ulength = static_cast<uint32_t>(filePath.length());

            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetChunkDataFile);
            fShmNonRtClientControl.writeUInt(ulength);
            fShmNonRtClientControl.writeCustomData(filePath.toRawUTF8(), ulength);
            fShmNonRtClientControl.commitWrite();
        }

        // save data internally as well
        fInfo.chunk.resize(dataSize);
#ifdef CARLA_PROPER_CPP11_SUPPORT
        std::memcpy(fInfo.chunk.data(), data, dataSize);
#else
        std::memcpy(&fInfo.chunk.front(), data, dataSize);
#endif
    }

    // -------------------------------------------------------------------
    // Set ui stuff

    void setCustomUITitle(const char* const title) noexcept override
    {
        carla_debug("CarlaPluginBridge::setCustomUITitle(%s)", title);

        if (fBridgeVersion >= 8)
        {
            const uint32_t size = static_cast<uint32_t>(std::strlen(title));

            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetWindowTitle);
            fShmNonRtClientControl.writeUInt(size);
            fShmNonRtClientControl.writeCustomData(title, size);
            fShmNonRtClientControl.commitWrite();
        }

        CarlaPlugin::setCustomUITitle(title);
    }

    void showCustomUI(const bool yesNo) override
    {
        if (yesNo && pData->uiTitle.isEmpty() && fBridgeVersion >= 8)
            _setUiTitleFromName();

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(yesNo ? kPluginBridgeNonRtClientShowUI : kPluginBridgeNonRtClientHideUI);
            fShmNonRtClientControl.commitWrite();
        }

#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
        if (yesNo)
        {
            pData->tryTransient();
        }
        else
        {
            pData->transientTryCounter = 0;
        }
#endif
    }

    void* embedCustomUI(void* const ptr) override
    {
        if (fBridgeVersion < 9)
            return nullptr;

        fPendingEmbedCustomUI = 0;

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientEmbedUI);
            fShmNonRtClientControl.writeULong(reinterpret_cast<uint64_t>(ptr));
            fShmNonRtClientControl.commitWrite();
        }

        const uint32_t timeoutEnd = carla_gettime_ms() + 15*1000; // 15 secs
        const bool needsEngineIdle = pData->engine->getType() != kEngineTypePlugin;

        for (; carla_gettime_ms() < timeoutEnd && fBridgeThread.isThreadRunning();)
        {
            pData->engine->callback(true, true, ENGINE_CALLBACK_IDLE, 0, 0, 0, 0, 0.0f, nullptr);

            if (needsEngineIdle)
                pData->engine->idle();

            if (fPendingEmbedCustomUI != 0)
            {
                if (fPendingEmbedCustomUI == 1)
                    fPendingEmbedCustomUI = 0;
                break;
            }

            carla_msleep(20);
        }

        return reinterpret_cast<void*>(fPendingEmbedCustomUI);
    }

    void idle() override
    {
        if (fBridgeThread.isThreadRunning())
        {
            if (fInitiated && fTimedOut && pData->active)
                setActive(false, true, true);

            {
                const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

                fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientPing);
                fShmNonRtClientControl.commitWrite();
            }

            try {
                handleNonRtData();
            } CARLA_SAFE_EXCEPTION("handleNonRtData");
        }
        else if (fInitiated)
        {
            fTimedOut   = true;
            fTimedError = true;
            fInitiated  = false;
            handleProcessStopped();
        }

        CarlaPlugin::idle();
    }

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

    void reload() override
    {
        CARLA_SAFE_ASSERT_RETURN(pData->engine != nullptr,);
        carla_debug("CarlaPluginBridge::reload() - start");

        const EngineProcessMode processMode(pData->engine->getProccessMode());

        // Safely disable plugin for reload
        const ScopedDisabler sd(this);

        // cleanup of previous data
        pData->audioIn.clear();
        pData->audioOut.clear();
        pData->cvIn.clear();
        pData->cvOut.clear();
        pData->event.clear();

        bool needsCtrlIn, needsCtrlOut;
        needsCtrlIn = needsCtrlOut = false;

        if (fInfo.aIns > 0)
        {
            pData->audioIn.createNew(fInfo.aIns);
        }

        if (fInfo.aOuts > 0)
        {
            pData->audioOut.createNew(fInfo.aOuts);
            needsCtrlIn = true;
        }

        if (fInfo.cvIns > 0)
        {
            pData->cvIn.createNew(fInfo.cvIns);
        }

        if (fInfo.cvOuts > 0)
        {
            pData->cvOut.createNew(fInfo.cvOuts);
        }

        if (fInfo.mIns > 0)
            needsCtrlIn = true;

        if (fInfo.mOuts > 0)
            needsCtrlOut = true;

        const uint portNameSize(pData->engine->getMaxPortNameSize());
        CarlaString portName;

        // Audio Ins
        for (uint32_t j=0; j < fInfo.aIns; ++j)
        {
            portName.clear();

            if (processMode == ENGINE_PROCESS_MODE_SINGLE_CLIENT)
            {
                portName  = pData->name;
                portName += ":";
            }

            if (fInfo.aInNames != nullptr && fInfo.aInNames[j] != nullptr)
            {
                portName += fInfo.aInNames[j];
            }
            else if (fInfo.aIns > 1)
            {
                portName += "input_";
                portName += CarlaString(j+1);
            }
            else
                portName += "input";

            portName.truncate(portNameSize);

            pData->audioIn.ports[j].port   = (CarlaEngineAudioPort*)pData->client->addPort(kEnginePortTypeAudio, portName, true, j);
            pData->audioIn.ports[j].rindex = j;
        }

        // Audio Outs
        for (uint32_t j=0; j < fInfo.aOuts; ++j)
        {
            portName.clear();

            if (processMode == ENGINE_PROCESS_MODE_SINGLE_CLIENT)
            {
                portName  = pData->name;
                portName += ":";
            }

            if (fInfo.aOutNames != nullptr && fInfo.aOutNames[j] != nullptr)
            {
                portName += fInfo.aOutNames[j];
            }
            else if (fInfo.aOuts > 1)
            {
                portName += "output_";
                portName += CarlaString(j+1);
            }
            else
                portName += "output";

            portName.truncate(portNameSize);

            pData->audioOut.ports[j].port   = (CarlaEngineAudioPort*)pData->client->addPort(kEnginePortTypeAudio, portName, false, j);
            pData->audioOut.ports[j].rindex = j;
        }

        // TODO - MIDI

        // CV Ins
        for (uint32_t j=0; j < fInfo.cvIns; ++j)
        {
            portName.clear();

            if (processMode == ENGINE_PROCESS_MODE_SINGLE_CLIENT)
            {
                portName  = pData->name;
                portName += ":";
            }

            if (fInfo.cvInNames != nullptr && fInfo.cvInNames[j] != nullptr)
            {
                portName += fInfo.cvInNames[j];
            }
            else if (fInfo.cvIns > 1)
            {
                portName += "cv_input_";
                portName += CarlaString(j+1);
            }
            else
                portName += "cv_input";

            portName.truncate(portNameSize);

            pData->cvIn.ports[j].port   = (CarlaEngineCVPort*)pData->client->addPort(kEnginePortTypeCV, portName, true, j);
            pData->cvIn.ports[j].rindex = j;
        }

        // CV Outs
        for (uint32_t j=0; j < fInfo.cvOuts; ++j)
        {
            portName.clear();

            if (processMode == ENGINE_PROCESS_MODE_SINGLE_CLIENT)
            {
                portName  = pData->name;
                portName += ":";
            }

            if (fInfo.cvOutNames != nullptr && fInfo.cvOutNames[j] != nullptr)
            {
                portName += fInfo.cvOutNames[j];
            }
            else if (fInfo.cvOuts > 1)
            {
                portName += "cv_output_";
                portName += CarlaString(j+1);
            }
            else
                portName += "cv_output";

            portName.truncate(portNameSize);

            pData->cvOut.ports[j].port   = (CarlaEngineCVPort*)pData->client->addPort(kEnginePortTypeCV, portName, false, j);
            pData->cvOut.ports[j].rindex = j;
        }

        if (needsCtrlIn)
        {
            portName.clear();

            if (processMode == ENGINE_PROCESS_MODE_SINGLE_CLIENT)
            {
                portName  = pData->name;
                portName += ":";
            }

            portName += "event-in";
            portName.truncate(portNameSize);

            pData->event.portIn = (CarlaEngineEventPort*)pData->client->addPort(kEnginePortTypeEvent, portName, true, 0);
#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
            pData->event.cvSourcePorts = pData->client->createCVSourcePorts();
#endif
        }

        if (needsCtrlOut)
        {
            portName.clear();

            if (processMode == ENGINE_PROCESS_MODE_SINGLE_CLIENT)
            {
                portName  = pData->name;
                portName += ":";
            }

            portName += "event-out";
            portName.truncate(portNameSize);

            pData->event.portOut = (CarlaEngineEventPort*)pData->client->addPort(kEnginePortTypeEvent, portName, false, 0);
        }

        // extra plugin hints
        pData->extraHints = 0x0;

        if (fInfo.mIns > 0)
            pData->extraHints |= PLUGIN_EXTRA_HINT_HAS_MIDI_IN;

        if (fInfo.mOuts > 0)
            pData->extraHints |= PLUGIN_EXTRA_HINT_HAS_MIDI_OUT;

        bufferSizeChanged(pData->engine->getBufferSize());
        reloadPrograms(true);

        carla_debug("CarlaPluginBridge::reload() - end");
    }

    // -------------------------------------------------------------------
    // Plugin processing

    void activate() noexcept override
    {
        if (! fBridgeThread.isThreadRunning())
        {
            CARLA_SAFE_ASSERT_RETURN(restartBridgeThread(),);
        }

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientActivate);
            fShmNonRtClientControl.commitWrite();
        }

        fTimedOut = false;

        try {
            waitForClient("activate", 2000);
        } CARLA_SAFE_EXCEPTION("activate - waitForClient");
    }

    void deactivate() noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(! fTimedError,);

        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientDeactivate);
            fShmNonRtClientControl.commitWrite();
        }

        fTimedOut = false;

        try {
            waitForClient("deactivate", 2000);
        } CARLA_SAFE_EXCEPTION("deactivate - waitForClient");
    }

    void process(const float* const* const audioIn,
                 float** const audioOut,
                 const float* const* const cvIn,
                 float** const cvOut,
                 const uint32_t frames) override
    {
        // --------------------------------------------------------------------------------------------------------
        // Check if active

        if (fTimedOut || fTimedError || ! pData->active)
        {
            // disable any output sound
            for (uint32_t i=0; i < pData->audioOut.count; ++i)
                carla_zeroFloats(audioOut[i], frames);
            for (uint32_t i=0; i < pData->cvOut.count; ++i)
                carla_zeroFloats(cvOut[i], frames);
            return;
        }

        // --------------------------------------------------------------------------------------------------------
        // Check if needs reset

        if (pData->needsReset)
        {
            // TODO

            pData->needsReset = false;
        }

        // --------------------------------------------------------------------------------------------------------
        // Event Input

        if (pData->event.portIn != nullptr)
        {
            // ----------------------------------------------------------------------------------------------------
            // MIDI Input (External)

            if (pData->extNotes.mutex.tryLock())
            {
                for (RtLinkedList<ExternalMidiNote>::Itenerator it = pData->extNotes.data.begin2(); it.valid(); it.next())
                {
                    const ExternalMidiNote& note(it.getValue(kExternalMidiNoteFallback));
                    CARLA_SAFE_ASSERT_CONTINUE(note.channel >= 0 && note.channel < MAX_MIDI_CHANNELS);

                    uint8_t data1, data2, data3;
                    data1 = uint8_t((note.velo > 0 ? MIDI_STATUS_NOTE_ON : MIDI_STATUS_NOTE_OFF) | (note.channel & MIDI_CHANNEL_BIT));
                    data2 = note.note;
                    data3 = note.velo;

                    fShmRtClientControl.writeOpcode(kPluginBridgeRtClientMidiEvent);
                    fShmRtClientControl.writeUInt(0); // time
                    fShmRtClientControl.writeByte(0); // port
                    fShmRtClientControl.writeByte(3); // size
                    fShmRtClientControl.writeByte(data1);
                    fShmRtClientControl.writeByte(data2);
                    fShmRtClientControl.writeByte(data3);
                    fShmRtClientControl.commitWrite();
                }

                pData->extNotes.data.clear();
                pData->extNotes.mutex.unlock();

            } // End of MIDI Input (External)

            // ----------------------------------------------------------------------------------------------------
            // Event Input (System)

#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
            bool allNotesOffSent = false;

            if (cvIn != nullptr && pData->event.cvSourcePorts != nullptr)
            {
                const bool isSampleAccurate = (pData->options & PLUGIN_OPTION_FIXED_BUFFERS) == 0x0;
                pData->event.cvSourcePorts->initPortBuffers(cvIn + pData->cvIn.count, frames, isSampleAccurate, pData->event.portIn);
            }
#endif

            for (uint32_t i=0, numEvents=pData->event.portIn->getEventCount(); i < numEvents; ++i)
            {
                EngineEvent& event(pData->event.portIn->getEvent(i));

                // Control change
                switch (event.type)
                {
                case kEngineEventTypeNull:
                    break;

                case kEngineEventTypeControl: {
                    EngineControlEvent& ctrlEvent = event.ctrl;

                    switch (ctrlEvent.type)
                    {
                    case kEngineControlEventTypeNull:
                        break;

                    case kEngineControlEventTypeParameter: {
                        float value;

#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
                        // non-midi
                        if (event.channel == kEngineEventNonMidiChannel)
                        {
                            const uint32_t k = ctrlEvent.param;
                            CARLA_SAFE_ASSERT_CONTINUE(k < pData->param.count);

                            ctrlEvent.handled = true;
                            value = pData->param.getFinalUnnormalizedValue(k, ctrlEvent.normalizedValue);
                            setParameterValueRT(k, value, event.time, true);
                            continue;
                        }

                        // Control backend stuff
                        if (event.channel == pData->ctrlChannel)
                        {

                            if (MIDI_IS_CONTROL_BREATH_CONTROLLER(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_DRYWET) != 0)
                            {
                                ctrlEvent.handled = true;
                                value = ctrlEvent.normalizedValue;
                                setDryWetRT(value, true);
                            }
                            else if (MIDI_IS_CONTROL_CHANNEL_VOLUME(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_VOLUME) != 0)
                            {
                                ctrlEvent.handled = true;
                                value = ctrlEvent.normalizedValue*127.0f/100.0f;
                                setVolumeRT(value, true);
                            }
                            else if (MIDI_IS_CONTROL_BALANCE(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_BALANCE) != 0)
                            {
                                float left, right;
                                value = ctrlEvent.normalizedValue/0.5f - 1.0f;

                                if (value < 0.0f)
                                {
                                    left  = -1.0f;
                                    right = (value*2.0f)+1.0f;
                                }
                                else if (value > 0.0f)
                                {
                                    left  = (value*2.0f)-1.0f;
                                    right = 1.0f;
                                }
                                else
                                {
                                    left  = -1.0f;
                                    right = 1.0f;
                                }

                                ctrlEvent.handled = true;
                                setBalanceLeftRT(left, true);
                                setBalanceRightRT(right, true);
                            }
                        }
#endif
                        // Control plugin parameters
                        for (uint32_t k=0; k < pData->param.count; ++k)
                        {
                            if (pData->param.data[k].midiChannel != event.channel)
                                continue;
                            if (pData->param.data[k].mappedControlIndex != ctrlEvent.param)
                                continue;
                            if (pData->param.data[k].type != PARAMETER_INPUT)
                                continue;
                            if ((pData->param.data[k].hints & PARAMETER_IS_AUTOMATABLE) == 0)
                                continue;

                            ctrlEvent.handled = true;
                            value = pData->param.getFinalUnnormalizedValue(k, ctrlEvent.normalizedValue);
                            setParameterValueRT(k, value, event.time, true);
                        }

#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
                        if (! ctrlEvent.handled)
                            checkForMidiLearn(event);
#endif

                        if ((pData->options & PLUGIN_OPTION_SEND_CONTROL_CHANGES) != 0 && ctrlEvent.param < MAX_MIDI_VALUE)
                        {
                            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientMidiEvent);
                            fShmRtClientControl.writeUInt(event.time);
                            fShmRtClientControl.writeByte(0); // port
                            fShmRtClientControl.writeByte(3); // size
                            fShmRtClientControl.writeByte(uint8_t(MIDI_STATUS_CONTROL_CHANGE | (event.channel & MIDI_CHANNEL_BIT)));
                            fShmRtClientControl.writeByte(uint8_t(ctrlEvent.param));
                            fShmRtClientControl.writeByte(uint8_t(ctrlEvent.normalizedValue*127.0f + 0.5f));
                        }
                        break;
                    }

                    case kEngineControlEventTypeMidiBank:
                        if (pData->options & PLUGIN_OPTION_MAP_PROGRAM_CHANGES)
                        {
                            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientControlEventMidiBank);
                            fShmRtClientControl.writeUInt(event.time);
                            fShmRtClientControl.writeByte(event.channel);
                            fShmRtClientControl.writeUShort(event.ctrl.param);
                            fShmRtClientControl.commitWrite();
                        }
                        else if ((pData->options & PLUGIN_OPTION_SEND_PROGRAM_CHANGES) != 0)
                        {
                            // VST2's that use banks usually require both a MSB bank message and a LSB bank message. The MSB bank message can just be 0
                            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientMidiEvent);
                            fShmRtClientControl.writeUInt(event.time);
                            fShmRtClientControl.writeByte(0); // port
                            fShmRtClientControl.writeByte(3); // size
                            fShmRtClientControl.writeByte(uint8_t(MIDI_STATUS_CONTROL_CHANGE | (event.channel & MIDI_CHANNEL_BIT)));
                            fShmRtClientControl.writeByte(MIDI_CONTROL_BANK_SELECT);
                            fShmRtClientControl.writeByte(0);
                            fShmRtClientControl.commitWrite();

                            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientMidiEvent);
                            fShmRtClientControl.writeUInt(event.time);
                            fShmRtClientControl.writeByte(0); // port
                            fShmRtClientControl.writeByte(3); // size
                            fShmRtClientControl.writeByte(uint8_t(MIDI_STATUS_CONTROL_CHANGE | (event.channel & MIDI_CHANNEL_BIT)));
                            fShmRtClientControl.writeByte(MIDI_CONTROL_BANK_SELECT__LSB);
                            fShmRtClientControl.writeByte(uint8_t(event.ctrl.param));
                            fShmRtClientControl.commitWrite();
                        }
                        break;

                    case kEngineControlEventTypeMidiProgram:
                        if (pData->options & PLUGIN_OPTION_MAP_PROGRAM_CHANGES || pData->options & PLUGIN_OPTION_SEND_PROGRAM_CHANGES)
                        {
                            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientControlEventMidiProgram);
                            fShmRtClientControl.writeUInt(event.time);
                            fShmRtClientControl.writeByte(event.channel);
                            fShmRtClientControl.writeUShort(event.ctrl.param);
                            fShmRtClientControl.commitWrite();
                        }
                        break;

                    case kEngineControlEventTypeAllSoundOff:
                        if (pData->options & PLUGIN_OPTION_SEND_ALL_SOUND_OFF)
                        {
                            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientControlEventAllSoundOff);
                            fShmRtClientControl.writeUInt(event.time);
                            fShmRtClientControl.writeByte(event.channel);
                            fShmRtClientControl.commitWrite();
                        }
                        break;

                    case kEngineControlEventTypeAllNotesOff:
                        if (pData->options & PLUGIN_OPTION_SEND_ALL_SOUND_OFF)
                        {
#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
                            if (event.channel == pData->ctrlChannel && ! allNotesOffSent)
                            {
                                allNotesOffSent = true;
                                postponeRtAllNotesOff();
                            }
#endif

                            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientControlEventAllNotesOff);
                            fShmRtClientControl.writeUInt(event.time);
                            fShmRtClientControl.writeByte(event.channel);
                            fShmRtClientControl.commitWrite();
                        }
                        break;
                    } // switch (ctrlEvent.type)
                    break;
                } // case kEngineEventTypeControl

                case kEngineEventTypeMidi: {
                    const EngineMidiEvent& midiEvent(event.midi);

                    if (midiEvent.size == 0 || midiEvent.size >= MAX_MIDI_VALUE)
                        continue;

                    const uint8_t* const midiData(midiEvent.size > EngineMidiEvent::kDataSize ? midiEvent.dataExt : midiEvent.data);

                    uint8_t status = uint8_t(MIDI_GET_STATUS_FROM_DATA(midiData));

                    if ((status == MIDI_STATUS_NOTE_OFF || status == MIDI_STATUS_NOTE_ON) && (pData->options & PLUGIN_OPTION_SKIP_SENDING_NOTES))
                        continue;
                    if (status == MIDI_STATUS_CHANNEL_PRESSURE && (pData->options & PLUGIN_OPTION_SEND_CHANNEL_PRESSURE) == 0)
                        continue;
                    if (status == MIDI_STATUS_CONTROL_CHANGE && (pData->options & PLUGIN_OPTION_SEND_CONTROL_CHANGES) == 0)
                        continue;
                    if (status == MIDI_STATUS_POLYPHONIC_AFTERTOUCH && (pData->options & PLUGIN_OPTION_SEND_NOTE_AFTERTOUCH) == 0)
                        continue;
                    if (status == MIDI_STATUS_PITCH_WHEEL_CONTROL && (pData->options & PLUGIN_OPTION_SEND_PITCHBEND) == 0)
                        continue;

                    // Fix bad note-off
                    if (status == MIDI_STATUS_NOTE_ON && midiData[2] == 0)
                        status = MIDI_STATUS_NOTE_OFF;

                    fShmRtClientControl.writeOpcode(kPluginBridgeRtClientMidiEvent);
                    fShmRtClientControl.writeUInt(event.time);
                    fShmRtClientControl.writeByte(midiEvent.port);
                    fShmRtClientControl.writeByte(midiEvent.size);

                    fShmRtClientControl.writeByte(uint8_t(midiData[0] | (event.channel & MIDI_CHANNEL_BIT)));

                    for (uint8_t j=1; j < midiEvent.size; ++j)
                        fShmRtClientControl.writeByte(midiData[j]);

                    fShmRtClientControl.commitWrite();

                    if (status == MIDI_STATUS_NOTE_ON)
                    {
                        pData->postponeNoteOnRtEvent(true, event.channel, midiData[1], midiData[2]);
                    }
                    else if (status == MIDI_STATUS_NOTE_OFF)
                    {
                        pData->postponeNoteOffRtEvent(true, event.channel, midiData[1]);
                    }
                } break;
                }
            }

            pData->postRtEvents.trySplice();

        } // End of Event Input

        if (! processSingle(audioIn, audioOut, cvIn, cvOut, frames))
            return;

        // --------------------------------------------------------------------------------------------------------
        // Control and MIDI Output

        if (pData->event.portOut != nullptr)
        {
            float value;

            for (uint32_t k=0; k < pData->param.count; ++k)
            {
                if (pData->param.data[k].type != PARAMETER_OUTPUT)
                    continue;

                if (pData->param.data[k].mappedControlIndex > 0)
                {
                    value = pData->param.ranges[k].getNormalizedValue(fParams[k].value);
                    pData->event.portOut->writeControlEvent(0,
                                                            pData->param.data[k].midiChannel,
                                                            kEngineControlEventTypeParameter,
                                                            static_cast<uint16_t>(pData->param.data[k].mappedControlIndex),
                                                            -1,
                                                            value);
                }
            }

            uint32_t time;
            uint8_t port, size;
            const uint8_t* midiData(fShmRtClientControl.data->midiOut);

            for (std::size_t read=0; read<kBridgeRtClientDataMidiOutSize-kBridgeBaseMidiOutHeaderSize;)
            {
                // get time
                time = *(const uint32_t*)midiData;
                midiData += 4;

                // get port and size
                port = *midiData++;
                size = *midiData++;

                if (size == 0)
                    break;

                // store midi data advancing as needed
                uint8_t data[4];

                {
                    uint8_t j=0;
                    for (; j<size && j<4; ++j)
                        data[j] = *midiData++;
                }

                if (size <= 4)
                    pData->event.portOut->writeMidiEvent(time, size, data);

                read += kBridgeBaseMidiOutHeaderSize + size;
            }

            // TODO
            (void)port;

        } // End of Control and MIDI Output
    }

    bool processSingle(const float* const* const audioIn, float** const audioOut,
                       const float* const* const cvIn, float** const cvOut, const uint32_t frames)
    {
        CARLA_SAFE_ASSERT_RETURN(! fTimedError, false);
        CARLA_SAFE_ASSERT_RETURN(frames > 0, false);
        CARLA_SAFE_ASSERT_RETURN(frames <= fBufferSize, false);

        if (pData->audioIn.count > 0)
        {
            CARLA_SAFE_ASSERT_RETURN(audioIn != nullptr, false);
        }
        if (pData->audioOut.count > 0)
        {
            CARLA_SAFE_ASSERT_RETURN(audioOut != nullptr, false);
        }
        if (pData->cvIn.count > 0)
        {
            CARLA_SAFE_ASSERT_RETURN(cvIn != nullptr, false);
        }
        if (pData->cvOut.count > 0)
        {
            CARLA_SAFE_ASSERT_RETURN(cvOut != nullptr, false);
        }

        // --------------------------------------------------------------------------------------------------------
        // Try lock, silence otherwise

#ifndef STOAT_TEST_BUILD
        if (pData->engine->isOffline())
        {
            pData->singleMutex.lock();
        }
        else
#endif
        if (! pData->singleMutex.tryLock())
        {
            for (uint32_t i=0; i < pData->audioOut.count; ++i)
                carla_zeroFloats(audioOut[i], frames);
            for (uint32_t i=0; i < pData->cvOut.count; ++i)
                carla_zeroFloats(cvOut[i], frames);
            return false;
        }

        // --------------------------------------------------------------------------------------------------------
        // Reset audio buffers

        for (uint32_t i=0; i < pData->audioIn.count; ++i)
            carla_copyFloats(fShmAudioPool.data + (i * fBufferSize), audioIn[i], frames);
        for (uint32_t i=0; i < pData->cvIn.count; ++i)
            carla_copyFloats(fShmAudioPool.data + ((pData->audioIn.count + pData->audioOut.count + i) * fBufferSize), cvIn[i], frames);

        // --------------------------------------------------------------------------------------------------------
        // TimeInfo

        const EngineTimeInfo timeInfo(pData->engine->getTimeInfo());
        BridgeTimeInfo& bridgeTimeInfo(fShmRtClientControl.data->timeInfo);

        bridgeTimeInfo.playing    = timeInfo.playing;
        bridgeTimeInfo.frame      = timeInfo.frame;
        bridgeTimeInfo.usecs      = timeInfo.usecs;
        bridgeTimeInfo.validFlags = timeInfo.bbt.valid ? kPluginBridgeTimeInfoValidBBT : 0x0;

        if (timeInfo.bbt.valid)
        {
            bridgeTimeInfo.bar  = timeInfo.bbt.bar;
            bridgeTimeInfo.beat = timeInfo.bbt.beat;
            bridgeTimeInfo.tick = timeInfo.bbt.tick;

            bridgeTimeInfo.beatsPerBar = timeInfo.bbt.beatsPerBar;
            bridgeTimeInfo.beatType    = timeInfo.bbt.beatType;

            bridgeTimeInfo.ticksPerBeat   = timeInfo.bbt.ticksPerBeat;
            bridgeTimeInfo.beatsPerMinute = timeInfo.bbt.beatsPerMinute;
            bridgeTimeInfo.barStartTick   = timeInfo.bbt.barStartTick;
        }

        // --------------------------------------------------------------------------------------------------------
        // Run plugin

        {
            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientProcess);
            fShmRtClientControl.writeUInt(frames);
            fShmRtClientControl.commitWrite();
        }

        waitForClient("process", fProcWaitTime);

        if (fTimedOut)
        {
            pData->singleMutex.unlock();
            return false;
        }

        for (uint32_t i=0; i < pData->audioOut.count; ++i)
            carla_copyFloats(audioOut[i], fShmAudioPool.data + ((pData->audioIn.count + i) * fBufferSize), frames);
        for (uint32_t i=0; i < pData->cvOut.count; ++i)
            carla_copyFloats(cvOut[i], fShmAudioPool.data + ((pData->audioIn.count + pData->audioOut.count + pData->cvIn.count + i) * fBufferSize), frames);

#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
        // --------------------------------------------------------------------------------------------------------
        // Post-processing (dry/wet, volume and balance)

        {
            const bool doVolume  = (pData->hints & PLUGIN_CAN_VOLUME) != 0 && carla_isNotEqual(pData->postProc.volume, 1.0f);
            const bool doDryWet  = (pData->hints & PLUGIN_CAN_DRYWET) != 0 && carla_isNotEqual(pData->postProc.dryWet, 1.0f);
            const bool doBalance = (pData->hints & PLUGIN_CAN_BALANCE) != 0 && ! (carla_isEqual(pData->postProc.balanceLeft, -1.0f) && carla_isEqual(pData->postProc.balanceRight, 1.0f));
            const bool isMono    = (pData->audioIn.count == 1);

            bool isPair;
            float bufValue;
            float* const oldBufLeft = pData->postProc.extraBuffer;

            for (uint32_t i=0; i < pData->audioOut.count; ++i)
            {
                // Dry/Wet
                if (doDryWet)
                {
                    const uint32_t c = isMono ? 0 : i;

                    for (uint32_t k=0; k < frames; ++k)
                    {
# ifndef BUILD_BRIDGE
                        if (k < pData->latency.frames && pData->latency.buffers != nullptr)
                            bufValue = pData->latency.buffers[c][k];
                        else if (pData->latency.frames < frames)
                            bufValue = audioIn[c][k-pData->latency.frames];
                        else
# endif
                            bufValue = audioIn[c][k];

                        audioOut[i][k] = (audioOut[i][k] * pData->postProc.dryWet) + (bufValue * (1.0f - pData->postProc.dryWet));
                    }
                }

                // Balance
                if (doBalance)
                {
                    isPair = (i % 2 == 0);

                    if (isPair)
                    {
                        CARLA_ASSERT(i+1 < pData->audioOut.count);
                        carla_copyFloats(oldBufLeft, audioOut[i], frames);
                    }

                    float balRangeL = (pData->postProc.balanceLeft  + 1.0f)/2.0f;
                    float balRangeR = (pData->postProc.balanceRight + 1.0f)/2.0f;

                    for (uint32_t k=0; k < frames; ++k)
                    {
                        if (isPair)
                        {
                            // left
                            audioOut[i][k]  = oldBufLeft[k]     * (1.0f - balRangeL);
                            audioOut[i][k] += audioOut[i+1][k] * (1.0f - balRangeR);
                        }
                        else
                        {
                            // right
                            audioOut[i][k]  = audioOut[i][k] * balRangeR;
                            audioOut[i][k] += oldBufLeft[k]   * balRangeL;
                        }
                    }
                }

                // Volume (and buffer copy)
                if (doVolume)
                {
                    for (uint32_t k=0; k < frames; ++k)
                        audioOut[i][k] *= pData->postProc.volume;
                }
            }

        } // End of Post-processing

# ifndef BUILD_BRIDGE
        // --------------------------------------------------------------------------------------------------------
        // Save latency values for next callback

        if (pData->latency.frames != 0 && pData->latency.buffers != nullptr)
        {
            const uint32_t latframes = pData->latency.frames;

            if (latframes <= frames)
            {
                for (uint32_t i=0; i < pData->audioIn.count; ++i)
                    carla_copyFloats(pData->latency.buffers[i], audioIn[i]+(frames-latframes), latframes);
            }
            else
            {
                const uint32_t diff = latframes - frames;

                for (uint32_t i=0, k; i<pData->audioIn.count; ++i)
                {
                    // push back buffer by 'frames'
                    for (k=0; k < diff; ++k)
                        pData->latency.buffers[i][k] = pData->latency.buffers[i][k+frames];

                    // put current input at the end
                    for (uint32_t j=0; k < latframes; ++j, ++k)
                        pData->latency.buffers[i][k] = audioIn[i][j];
                }
            }
        }
# endif
#endif // BUILD_BRIDGE_ALTERNATIVE_ARCH

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

        pData->singleMutex.unlock();
        return true;
    }

    void bufferSizeChanged(const uint32_t newBufferSize) override
    {
        fBufferSize = newBufferSize;
        resizeAudioPool(newBufferSize);

        {
            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientSetBufferSize);
            fShmRtClientControl.writeUInt(newBufferSize);
            fShmRtClientControl.commitWrite();
        }

        //fProcWaitTime = newBufferSize*1000/pData->engine->getSampleRate();
        fProcWaitTime = 1000;

        waitForClient("buffersize", 1000);

        CarlaPlugin::bufferSizeChanged(newBufferSize);
    }

    void sampleRateChanged(const double newSampleRate) override
    {
        {
            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientSetSampleRate);
            fShmRtClientControl.writeDouble(newSampleRate);
            fShmRtClientControl.commitWrite();
        }

        //fProcWaitTime = pData->engine->getBufferSize()*1000/newSampleRate;
        fProcWaitTime = 1000;

        waitForClient("samplerate", 1000);
    }

    void offlineModeChanged(const bool isOffline) override
    {
        {
            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientSetOnline);
            fShmRtClientControl.writeBool(isOffline);
            fShmRtClientControl.commitWrite();
        }

        waitForClient("offline", 1000);
    }

    // -------------------------------------------------------------------
    // Plugin buffers

    void clearBuffers() noexcept override
    {
        if (fParams != nullptr)
        {
            delete[] fParams;
            fParams = nullptr;
        }

        CarlaPlugin::clearBuffers();
    }

    // -------------------------------------------------------------------
    // Post-poned UI Stuff

    void uiParameterChange(const uint32_t index, const float value) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(index < pData->param.count,);

        const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

        fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientUiParameterChange);
        fShmNonRtClientControl.writeUInt(index);
        fShmNonRtClientControl.writeFloat(value);
        fShmNonRtClientControl.commitWrite();
    }

    void uiProgramChange(const uint32_t index) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(index < pData->prog.count,);

        const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

        fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientUiProgramChange);
        fShmNonRtClientControl.writeUInt(index);
        fShmNonRtClientControl.commitWrite();
    }

    void uiMidiProgramChange(const uint32_t index) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(index < pData->midiprog.count,);

        const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

        fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientUiMidiProgramChange);
        fShmNonRtClientControl.writeUInt(index);
        fShmNonRtClientControl.commitWrite();
    }

    void uiNoteOn(const uint8_t channel, const uint8_t note, const uint8_t velo) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(channel < MAX_MIDI_CHANNELS,);
        CARLA_SAFE_ASSERT_RETURN(note < MAX_MIDI_NOTE,);
        CARLA_SAFE_ASSERT_RETURN(velo > 0 && velo < MAX_MIDI_VALUE,);

        const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

        fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientUiNoteOn);
        fShmNonRtClientControl.writeByte(channel);
        fShmNonRtClientControl.writeByte(note);
        fShmNonRtClientControl.writeByte(velo);
        fShmNonRtClientControl.commitWrite();
    }

    void uiNoteOff(const uint8_t channel, const uint8_t note) noexcept override
    {
        CARLA_SAFE_ASSERT_RETURN(channel < MAX_MIDI_CHANNELS,);
        CARLA_SAFE_ASSERT_RETURN(note < MAX_MIDI_NOTE,);

        const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

        fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientUiNoteOff);
        fShmNonRtClientControl.writeByte(channel);
        fShmNonRtClientControl.writeByte(note);
        fShmNonRtClientControl.commitWrite();
    }

    // -------------------------------------------------------------------
    // Internal helper functions

    void restoreLV2State(bool) noexcept override
    {
        const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

        fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientRestoreLV2State);
        fShmNonRtClientControl.commitWrite();
    }

    void waitForBridgeSaveSignal() noexcept override
    {
        // VSTs only save chunks, for which we already have a waitForSaved there
        if (fPluginType != PLUGIN_VST2)
            waitForSaved();
    }

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

    void handleNonRtData()
    {
        for (; fShmNonRtServerControl.isDataAvailableForReading();)
        {
            const PluginBridgeNonRtServerOpcode opcode(fShmNonRtServerControl.readOpcode());
#ifdef DEBUG
            if (opcode != kPluginBridgeNonRtServerPong && opcode != kPluginBridgeNonRtServerParameterValue2) {
                carla_debug("CarlaPluginBridge::handleNonRtData() - got opcode: %s", PluginBridgeNonRtServerOpcode2str(opcode));
            }
#endif
            switch (opcode)
            {
            case kPluginBridgeNonRtServerNull:
            case kPluginBridgeNonRtServerPong:
                break;

            case kPluginBridgeNonRtServerVersion:
                fBridgeVersion = fShmNonRtServerControl.readUInt();
                break;

            case kPluginBridgeNonRtServerPluginInfo1: {
                // uint/category, uint/hints, uint/optionsAvailable, uint/optionsEnabled, long/uniqueId
                const uint32_t category = fShmNonRtServerControl.readUInt();
                const uint32_t hints    = fShmNonRtServerControl.readUInt();
                const uint32_t optionAv = fShmNonRtServerControl.readUInt();
                const uint32_t optionEn = fShmNonRtServerControl.readUInt();
                const  int64_t uniqueId = fShmNonRtServerControl.readLong();

                if (fUniqueId != 0) {
                    CARLA_SAFE_ASSERT_INT2(fUniqueId == uniqueId, fUniqueId, uniqueId);
                }

                pData->hints   = hints | PLUGIN_IS_BRIDGE;
                pData->options = optionEn;

               #ifdef HAVE_X11
                if (fBridgeVersion < 9 || fBinaryType == BINARY_WIN32 || fBinaryType == BINARY_WIN64)
               #endif
                {
                    pData->hints &= ~PLUGIN_HAS_CUSTOM_EMBED_UI;
                }

                fInfo.category = static_cast<PluginCategory>(category);
                fInfo.optionsAvailable = optionAv;
            }   break;

            case kPluginBridgeNonRtServerPluginInfo2: {
                // uint/size, str[] (realName), uint/size, str[] (label), uint/size, str[] (maker), uint/size, str[] (copyright)

                // realName
                BridgeTextReader realName(fShmNonRtServerControl);

                // label
                BridgeTextReader label(fShmNonRtServerControl);

                // maker
                BridgeTextReader maker(fShmNonRtServerControl);

                // copyright
                BridgeTextReader copyright(fShmNonRtServerControl);

                fInfo.name  = realName.text;
                fInfo.label = label.text;
                fInfo.maker = maker.text;
                fInfo.copyright = copyright.text;
                realName.text = label.text = maker.text = copyright.text = nullptr;

                if (pData->name == nullptr)
                    pData->name = pData->engine->getUniquePluginName(fInfo.name);
            }   break;

            case kPluginBridgeNonRtServerAudioCount: {
                // uint/ins, uint/outs
                fInfo.clear();

                fInfo.aIns  = fShmNonRtServerControl.readUInt();
                fInfo.aOuts = fShmNonRtServerControl.readUInt();

                if (fInfo.aIns > 0)
                {
                    fInfo.aInNames = new const char*[fInfo.aIns];
                    carla_zeroPointers(fInfo.aInNames, fInfo.aIns);
                }

                if (fInfo.aOuts > 0)
                {
                    fInfo.aOutNames = new const char*[fInfo.aOuts];
                    carla_zeroPointers(fInfo.aOutNames, fInfo.aOuts);
                }

            }   break;

            case kPluginBridgeNonRtServerMidiCount: {
                // uint/ins, uint/outs
                fInfo.mIns  = fShmNonRtServerControl.readUInt();
                fInfo.mOuts = fShmNonRtServerControl.readUInt();
            }   break;

            case kPluginBridgeNonRtServerCvCount: {
                // uint/ins, uint/outs
                fInfo.cvIns  = fShmNonRtServerControl.readUInt();
                fInfo.cvOuts = fShmNonRtServerControl.readUInt();
            }   break;

            case kPluginBridgeNonRtServerParameterCount: {
                // uint/count
                const uint32_t count = fShmNonRtServerControl.readUInt();

                // delete old data
                pData->param.clear();

                if (fParams != nullptr)
                {
                    delete[] fParams;
                    fParams = nullptr;
                }

                if (count > 0)
                {
                    pData->param.createNew(count, false);
                    fParams = new BridgeParamInfo[count];

                    // we might not receive all parameter data, so ensure range max is not 0
                    for (uint32_t i=0; i<count; ++i)
                    {
                        pData->param.ranges[i].def = 0.0f;
                        pData->param.ranges[i].min = 0.0f;
                        pData->param.ranges[i].max = 1.0f;
                        pData->param.ranges[i].step = 0.001f;
                        pData->param.ranges[i].stepSmall = 0.0001f;
                        pData->param.ranges[i].stepLarge = 0.1f;
                    }
                }
            }   break;

            case kPluginBridgeNonRtServerProgramCount: {
                // uint/count
                pData->prog.clear();

                if (const uint32_t count = fShmNonRtServerControl.readUInt())
                    pData->prog.createNew(count);

            }   break;

            case kPluginBridgeNonRtServerMidiProgramCount: {
                // uint/count
                pData->midiprog.clear();

                if (const uint32_t count = fShmNonRtServerControl.readUInt())
                    pData->midiprog.createNew(count);

            }   break;

            case kPluginBridgeNonRtServerPortName: {
                // byte/type, uint/index, uint/size, str[] (name)
                const uint8_t  portType = fShmNonRtServerControl.readByte();
                const uint32_t index    = fShmNonRtServerControl.readUInt();

                // name
                BridgeTextReader name(fShmNonRtServerControl);

                CARLA_SAFE_ASSERT_BREAK(portType > kPluginBridgePortNull && portType < kPluginBridgePortTypeCount);

                switch (portType)
                {
                case kPluginBridgePortAudioInput:
                    CARLA_SAFE_ASSERT_BREAK(index < fInfo.aIns);
                    fInfo.aInNames[index] = name.text;
                    name.text = nullptr;
                    break;
                case kPluginBridgePortAudioOutput:
                    CARLA_SAFE_ASSERT_BREAK(index < fInfo.aOuts);
                    fInfo.aOutNames[index] = name.text;
                    name.text = nullptr;
                    break;
                }

            }   break;

            case kPluginBridgeNonRtServerParameterData1: {
                // uint/index, int/rindex, uint/type, uint/hints, short/cc
                const uint32_t index  = fShmNonRtServerControl.readUInt();
                const  int32_t rindex = fShmNonRtServerControl.readInt();
                const uint32_t type   = fShmNonRtServerControl.readUInt();
                const uint32_t hints  = fShmNonRtServerControl.readUInt();
                const  int16_t ctrl   = fShmNonRtServerControl.readShort();

                CARLA_SAFE_ASSERT_INT_BREAK(ctrl >= CONTROL_INDEX_NONE && ctrl <= CONTROL_INDEX_MAX_ALLOWED, ctrl);
                CARLA_SAFE_ASSERT_UINT2_BREAK(index < pData->param.count, index, pData->param.count);

                pData->param.data[index].type   = static_cast<ParameterType>(type);
                pData->param.data[index].index  = static_cast<int32_t>(index);
                pData->param.data[index].rindex = rindex;
                pData->param.data[index].hints  = hints;
                pData->param.data[index].mappedControlIndex = ctrl;
            }   break;

            case kPluginBridgeNonRtServerParameterData2: {
                // uint/index, uint/size, str[] (name), uint/size, str[] (symbol), uint/size, str[] (unit)
                const uint32_t index = fShmNonRtServerControl.readUInt();

                // name
                BridgeTextReader name(fShmNonRtServerControl);

                // symbol
                BridgeTextReader symbol(fShmNonRtServerControl);

                // unit
                BridgeTextReader unit(fShmNonRtServerControl);

                CARLA_SAFE_ASSERT_UINT2_BREAK(index < pData->param.count, index, pData->param.count);

                fParams[index].name   = name.text;
                fParams[index].symbol = symbol.text;
                fParams[index].unit   = unit.text;
                name.text = symbol.text = unit.text = nullptr;
            }   break;

            case kPluginBridgeNonRtServerParameterRanges: {
                // uint/index, float/def, float/min, float/max, float/step, float/stepSmall, float/stepLarge
                const uint32_t index = fShmNonRtServerControl.readUInt();
                const float def      = fShmNonRtServerControl.readFloat();
                const float min      = fShmNonRtServerControl.readFloat();
                const float max      = fShmNonRtServerControl.readFloat();
                const float step      = fShmNonRtServerControl.readFloat();
                const float stepSmall = fShmNonRtServerControl.readFloat();
                const float stepLarge = fShmNonRtServerControl.readFloat();

                CARLA_SAFE_ASSERT_BREAK(min < max);
                CARLA_SAFE_ASSERT_BREAK(def >= min);
                CARLA_SAFE_ASSERT_BREAK(def <= max);
                CARLA_SAFE_ASSERT_UINT2_BREAK(index < pData->param.count, index, pData->param.count);

                pData->param.ranges[index].def = def;
                pData->param.ranges[index].min = min;
                pData->param.ranges[index].max = max;
                pData->param.ranges[index].step      = step;
                pData->param.ranges[index].stepSmall = stepSmall;
                pData->param.ranges[index].stepLarge = stepLarge;
            }   break;

            case kPluginBridgeNonRtServerParameterValue: {
                // uint/index, float/value
                const uint32_t index = fShmNonRtServerControl.readUInt();
                const float    value = fShmNonRtServerControl.readFloat();

                if (index < pData->param.count)
                {
                    const float fixedValue(pData->param.getFixedValue(index, value));

                    if (carla_isNotEqual(fParams[index].value, fixedValue))
                    {
                        fParams[index].value = fixedValue;
                        CarlaPlugin::setParameterValue(index, fixedValue, false, true, true);
                    }
                }
            }   break;

            case kPluginBridgeNonRtServerParameterValue2: {
                // uint/index, float/value
                const uint32_t index = fShmNonRtServerControl.readUInt();
                const float    value = fShmNonRtServerControl.readFloat();

                if (index < pData->param.count)
                {
                    const float fixedValue(pData->param.getFixedValue(index, value));
                    fParams[index].value = fixedValue;
                }
            }   break;

            case kPluginBridgeNonRtServerParameterTouch: {
                // uint/index, bool/touch
                const uint32_t index = fShmNonRtServerControl.readUInt();
                const bool     touch = fShmNonRtServerControl.readBool();

                pData->engine->touchPluginParameter(pData->id, index, touch);
            }   break;

            case kPluginBridgeNonRtServerDefaultValue: {
                // uint/index, float/value
                const uint32_t index = fShmNonRtServerControl.readUInt();
                const float    value = fShmNonRtServerControl.readFloat();

                if (index < pData->param.count)
                    pData->param.ranges[index].def = value;
            }   break;

            case kPluginBridgeNonRtServerCurrentProgram: {
                // int/index
                const int32_t index = fShmNonRtServerControl.readInt();

                CARLA_SAFE_ASSERT_BREAK(index >= -1);
                CARLA_SAFE_ASSERT_INT2(index < static_cast<int32_t>(pData->prog.count), index, pData->prog.count);

                CarlaPlugin::setProgram(index, false, true, true);
            }   break;

            case kPluginBridgeNonRtServerCurrentMidiProgram: {
                // int/index
                const int32_t index = fShmNonRtServerControl.readInt();

                CARLA_SAFE_ASSERT_BREAK(index >= -1);
                CARLA_SAFE_ASSERT_INT2(index < static_cast<int32_t>(pData->midiprog.count), index, pData->midiprog.count);

                CarlaPlugin::setMidiProgram(index, false, true, true);
            }   break;

            case kPluginBridgeNonRtServerProgramName: {
                // uint/index, uint/size, str[] (name)
                const uint32_t index = fShmNonRtServerControl.readUInt();

                // name
                const BridgeTextReader name(fShmNonRtServerControl);

                CARLA_SAFE_ASSERT_INT2(index < pData->prog.count, index, pData->prog.count);

                if (index < pData->prog.count)
                {
                    if (pData->prog.names[index] != nullptr)
                        delete[] pData->prog.names[index];
                    pData->prog.names[index] = carla_strdup(name.text);
                }
            }   break;

            case kPluginBridgeNonRtServerMidiProgramData: {
                // uint/index, uint/bank, uint/program, uint/size, str[] (name)
                const uint32_t index   = fShmNonRtServerControl.readUInt();
                const uint32_t bank    = fShmNonRtServerControl.readUInt();
                const uint32_t program = fShmNonRtServerControl.readUInt();

                // name
                const BridgeTextReader name(fShmNonRtServerControl);

                CARLA_SAFE_ASSERT_INT2(index < pData->midiprog.count, index, pData->midiprog.count);

                if (index < pData->midiprog.count)
                {
                    if (pData->midiprog.data[index].name != nullptr)
                        delete[] pData->midiprog.data[index].name;
                    pData->midiprog.data[index].bank    = bank;
                    pData->midiprog.data[index].program = program;
                    pData->midiprog.data[index].name    = carla_strdup(name.text);
                }
            }   break;

            case kPluginBridgeNonRtServerSetCustomData: {
                // uint/size, str[], uint/size, str[], uint/size, str[]
                const uint32_t maxLocalValueLen = fBridgeVersion >= 10 ? 4096 : 16384;

                // type
                const BridgeTextReader type(fShmNonRtServerControl);

                // key
                const BridgeTextReader key(fShmNonRtServerControl);

                // value
                const uint32_t valueSize = fShmNonRtServerControl.readUInt();

                // special case for big values
                if (valueSize > maxLocalValueLen)
                {
                    const BridgeTextReader bigValueFilePath(fShmNonRtServerControl);

                    String realBigValueFilePath(bigValueFilePath.text);

                   #ifndef CARLA_OS_WIN
                    // Using Wine, fix temp dir
                    if (fBinaryType == BINARY_WIN32 || fBinaryType == BINARY_WIN64)
                    {
                        const StringArray driveLetterSplit(StringArray::fromTokens(realBigValueFilePath, ":/", ""));
                        carla_stdout("big value save path BEFORE => '%s' | using wineprefix '%s'", realBigValueFilePath.toRawUTF8(), fWinePrefix.buffer());

                        realBigValueFilePath  = fWinePrefix.buffer();
                        realBigValueFilePath += "/drive_";
                        realBigValueFilePath += driveLetterSplit[0].toLowerCase();
                        realBigValueFilePath += driveLetterSplit[1];

                        realBigValueFilePath  = realBigValueFilePath.replace("\\", "/");
                        carla_stdout("big value save path AFTER => '%s'", realBigValueFilePath.toRawUTF8());
                    }
                   #endif

                    const File bigValueFile(realBigValueFilePath.toRawUTF8());
                    CARLA_SAFE_ASSERT_BREAK(bigValueFile.existsAsFile());

                    CarlaPlugin::setCustomData(type.text, key.text, bigValueFile.loadFileAsString().toRawUTF8(), false);

                    bigValueFile.deleteFile();
                }
                else
                {
                    const BridgeTextReader value(fShmNonRtServerControl, valueSize);

                    CarlaPlugin::setCustomData(type.text, key.text, value.text, false);
                }

            }   break;

            case kPluginBridgeNonRtServerSetChunkDataFile: {
                // uint/size, str[] (filename)

                // chunkFilePath
                const BridgeTextReader chunkFilePath(fShmNonRtServerControl);

                String realChunkFilePath(chunkFilePath.text);

               #ifndef CARLA_OS_WIN
                // Using Wine, fix temp dir
                if (fBinaryType == BINARY_WIN32 || fBinaryType == BINARY_WIN64)
                {
                    const StringArray driveLetterSplit(StringArray::fromTokens(realChunkFilePath, ":/", ""));
                    carla_stdout("chunk save path BEFORE => '%s' | using wineprefix '%s'", realChunkFilePath.toRawUTF8(), fWinePrefix.buffer());

                    realChunkFilePath  = fWinePrefix.buffer();
                    realChunkFilePath += "/drive_";
                    realChunkFilePath += driveLetterSplit[0].toLowerCase();
                    realChunkFilePath += driveLetterSplit[1];

                    realChunkFilePath  = realChunkFilePath.replace("\\", "/");
                    carla_stdout("chunk save path AFTER => '%s'", realChunkFilePath.toRawUTF8());
                }
               #endif

                const File chunkFile(realChunkFilePath.toRawUTF8());
                CARLA_SAFE_ASSERT_BREAK(chunkFile.existsAsFile());

                fInfo.chunk = carla_getChunkFromBase64String(chunkFile.loadFileAsString().toRawUTF8());
                chunkFile.deleteFile();
            }   break;

            case kPluginBridgeNonRtServerSetLatency:
                // uint
                fLatency = fShmNonRtServerControl.readUInt();
#ifndef BUILD_BRIDGE
                if (! fInitiated)
                    pData->latency.recreateBuffers(std::max(fInfo.aIns, fInfo.aOuts), fLatency);
#endif
                break;

            case kPluginBridgeNonRtServerSetParameterText: {
                const int32_t index = fShmNonRtServerControl.readInt();

                const uint32_t textSize = fShmNonRtServerControl.readUInt();
                const BridgeTextReader text(fShmNonRtServerControl, textSize);

                fReceivingParamText.setReceivedData(index, text.text, textSize);
            }   break;

            case kPluginBridgeNonRtServerReady:
                fInitiated = true;
                break;

            case kPluginBridgeNonRtServerSaved:
                fSaved = true;
                break;

            case kPluginBridgeNonRtServerRespEmbedUI:
                fPendingEmbedCustomUI = fShmNonRtServerControl.readULong();
                break;

            case kPluginBridgeNonRtServerResizeEmbedUI: {
                const uint width = fShmNonRtServerControl.readUInt();
                const uint height = fShmNonRtServerControl.readUInt();
                pData->engine->callback(true, true, ENGINE_CALLBACK_EMBED_UI_RESIZED, pData->id,
                                        static_cast<int>(width), static_cast<int>(height),
                                        0, 0.0f, nullptr);
            }   break;

            case kPluginBridgeNonRtServerUiClosed:
#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
                pData->transientTryCounter = 0;
#endif
                pData->engine->callback(true, true, ENGINE_CALLBACK_UI_STATE_CHANGED, pData->id,
                                        0, 0, 0, 0.0f, nullptr);
                break;

            case kPluginBridgeNonRtServerError: {
                // error
                const BridgeTextReader error(fShmNonRtServerControl);

                if (fInitiated)
                {
                    pData->engine->callback(true, true, ENGINE_CALLBACK_ERROR, pData->id, 0, 0, 0, 0.0f, error.text);

                    // just in case
                    pData->engine->setLastError(error.text);
                    fInitError = true;
                }
                else
                {
                    pData->engine->setLastError(error.text);
                    fInitError = true;
                    fInitiated = true;
                }
            }   break;
            }
        }
    }

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

    uintptr_t getUiBridgeProcessId() const noexcept override
    {
        return fBridgeThread.getProcessPID();
    }

    const void* getExtraStuff() const noexcept override
    {
        return fBridgeBinary.isNotEmpty() ? fBridgeBinary.buffer() : nullptr;
    }

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

    bool init(CarlaPluginPtr plugin,
              const char* const filename,
              const char* const name,
              const char* const label,
              const int64_t uniqueId,
              const uint options,
              const char* const binaryArchName,
              const char* const bridgeBinary)
    {
        CARLA_SAFE_ASSERT_RETURN(pData->engine != nullptr, false);

        // ---------------------------------------------------------------
        // first checks

        if (pData->client != nullptr)
        {
            pData->engine->setLastError("Plugin client is already registered");
            return false;
        }

        if (bridgeBinary == nullptr || bridgeBinary[0] == '\0')
        {
            pData->engine->setLastError("null bridge binary");
            return false;
        }

        // ---------------------------------------------------------------
        // set info

        if (name != nullptr && name[0] != '\0')
            pData->name = pData->engine->getUniquePluginName(name);

        if (filename != nullptr && filename[0] != '\0')
            pData->filename = carla_strdup(filename);
        else
            pData->filename = carla_strdup("");

        fUniqueId     = uniqueId;
        fBridgeBinary = bridgeBinary;

        std::srand(static_cast<uint>(std::time(nullptr)));

        // ---------------------------------------------------------------
        // init sem/shm

        if (! fShmAudioPool.initializeServer())
        {
            carla_stderr("Failed to initialize shared memory audio pool");
            return false;
        }

        if (! fShmRtClientControl.initializeServer())
        {
            carla_stderr("Failed to initialize RT client control");
            fShmAudioPool.clear();
            return false;
        }

        if (! fShmNonRtClientControl.initializeServer())
        {
            carla_stderr("Failed to initialize Non-RT client control");
            fShmRtClientControl.clear();
            fShmAudioPool.clear();
            return false;
        }

        if (! fShmNonRtServerControl.initializeServer())
        {
            carla_stderr("Failed to initialize Non-RT server control");
            fShmNonRtClientControl.clear();
            fShmRtClientControl.clear();
            fShmAudioPool.clear();
            return false;
        }

       #ifndef CARLA_OS_WIN
        // ---------------------------------------------------------------
        // set wine prefix

        if (fBridgeBinary.contains(".exe", true))
        {
            const EngineOptions& engineOptions(pData->engine->getOptions());

            water::String winePrefix;

            if (engineOptions.wine.autoPrefix)
                winePrefix = findWinePrefix(pData->filename);

            if (winePrefix.isEmpty())
            {
                const char* const envWinePrefix = std::getenv("WINEPREFIX");

                if (envWinePrefix != nullptr && envWinePrefix[0] != '\0')
                    winePrefix = envWinePrefix;
                else if (engineOptions.wine.fallbackPrefix != nullptr && engineOptions.wine.fallbackPrefix[0] != '\0')
                    winePrefix = engineOptions.wine.fallbackPrefix;
                else
                    winePrefix = File::getSpecialLocation(File::userHomeDirectory).getFullPathName() + "/.wine";
            }

            fWinePrefix = winePrefix.toRawUTF8();
        }
       #endif

        // ---------------------------------------------------------------
        // init bridge thread

        {
            char shmIdsStr[6*4+1];
            carla_zeroChars(shmIdsStr, 6*4+1);

            std::strncpy(shmIdsStr+6*0, &fShmAudioPool.filename[fShmAudioPool.filename.length()-6], 6);
            std::strncpy(shmIdsStr+6*1, &fShmRtClientControl.filename[fShmRtClientControl.filename.length()-6], 6);
            std::strncpy(shmIdsStr+6*2, &fShmNonRtClientControl.filename[fShmNonRtClientControl.filename.length()-6], 6);
            std::strncpy(shmIdsStr+6*3, &fShmNonRtServerControl.filename[fShmNonRtServerControl.filename.length()-6], 6);

            fBridgeThread.setData(
                                 #ifndef CARLA_OS_WIN
                                  fWinePrefix,
                                 #endif
                                  binaryArchName, bridgeBinary, label, shmIdsStr);
        }

        if (! restartBridgeThread())
            return false;

        // ---------------------------------------------------------------
        // register client

        if (pData->name == nullptr)
        {
            if (label != nullptr && label[0] != '\0')
                pData->name = pData->engine->getUniquePluginName(label);
            else
                pData->name = pData->engine->getUniquePluginName("unknown");
        }

        pData->client = pData->engine->addClient(plugin);

        if (pData->client == nullptr || ! pData->client->isOk())
        {
            pData->engine->setLastError("Failed to register plugin client");
            return false;
        }

        // ---------------------------------------------------------------
        // set options

        pData->options = 0x0;

        if ((fInfo.optionsAvailable & PLUGIN_OPTION_FIXED_BUFFERS) == 0x0)
            pData->options |= PLUGIN_OPTION_FIXED_BUFFERS;
         else if (isPluginOptionEnabled(options, PLUGIN_OPTION_FIXED_BUFFERS))
            pData->options |= PLUGIN_OPTION_FIXED_BUFFERS;

        if (pData->engine->getOptions().forceStereo)
        {
            pData->options |= PLUGIN_OPTION_FORCE_STEREO;
        }
        else if (fInfo.optionsAvailable & PLUGIN_OPTION_FORCE_STEREO)
        {
            if (options & PLUGIN_OPTION_FORCE_STEREO)
                pData->options |= PLUGIN_OPTION_FORCE_STEREO;
        }

        if (fInfo.optionsAvailable & PLUGIN_OPTION_USE_CHUNKS)
            if (isPluginOptionEnabled(options, PLUGIN_OPTION_USE_CHUNKS))
                pData->options |= PLUGIN_OPTION_USE_CHUNKS;

        if (fInfo.optionsAvailable & PLUGIN_OPTION_SEND_CONTROL_CHANGES)
            if (isPluginOptionEnabled(options, PLUGIN_OPTION_SEND_CONTROL_CHANGES))
                pData->options |= PLUGIN_OPTION_SEND_CONTROL_CHANGES;

        if (fInfo.optionsAvailable & PLUGIN_OPTION_SEND_CHANNEL_PRESSURE)
            if (isPluginOptionEnabled(options, PLUGIN_OPTION_SEND_CHANNEL_PRESSURE))
                pData->options |= PLUGIN_OPTION_SEND_CHANNEL_PRESSURE;

        if (fInfo.optionsAvailable & PLUGIN_OPTION_SEND_NOTE_AFTERTOUCH)
            if (isPluginOptionEnabled(options, PLUGIN_OPTION_SEND_NOTE_AFTERTOUCH))
                pData->options |= PLUGIN_OPTION_SEND_NOTE_AFTERTOUCH;

        if (fInfo.optionsAvailable & PLUGIN_OPTION_SEND_PITCHBEND)
            if (isPluginOptionEnabled(options, PLUGIN_OPTION_SEND_PITCHBEND))
                pData->options |= PLUGIN_OPTION_SEND_PITCHBEND;

        if (fInfo.optionsAvailable & PLUGIN_OPTION_SEND_ALL_SOUND_OFF)
            if (isPluginOptionEnabled(options, PLUGIN_OPTION_SEND_ALL_SOUND_OFF))
                pData->options |= PLUGIN_OPTION_SEND_ALL_SOUND_OFF;

        if (fInfo.optionsAvailable & PLUGIN_OPTION_SKIP_SENDING_NOTES)
            if (isPluginOptionInverseEnabled(options, PLUGIN_OPTION_SKIP_SENDING_NOTES))
                pData->options |= PLUGIN_OPTION_SKIP_SENDING_NOTES;

        if (fInfo.optionsAvailable & PLUGIN_OPTION_SEND_PROGRAM_CHANGES)
        {
            if (isPluginOptionEnabled(options, PLUGIN_OPTION_SEND_PROGRAM_CHANGES))
                pData->options |= PLUGIN_OPTION_SEND_PROGRAM_CHANGES;
        }
        else if (fInfo.optionsAvailable & PLUGIN_OPTION_MAP_PROGRAM_CHANGES)
        {
            if (isPluginOptionEnabled(options, PLUGIN_OPTION_MAP_PROGRAM_CHANGES))
                pData->options |= PLUGIN_OPTION_MAP_PROGRAM_CHANGES;
        }

        // kPluginBridgeNonRtClientSetOptions was added in API 7
        if (fBridgeVersion >= 7)
        {
            const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

            fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetOptions);
            fShmNonRtClientControl.writeUInt(pData->options);
            fShmNonRtClientControl.commitWrite();
        }

        return true;
    }

private:
    const BinaryType fBinaryType;
    const PluginType fPluginType;
    uint fBridgeVersion;

    bool fInitiated;
    bool fInitError;
    bool fSaved;
    bool fTimedOut;
    bool fTimedError;
    uint fBufferSize;
    uint fProcWaitTime;
    uint64_t fPendingEmbedCustomUI;

    CarlaString             fBridgeBinary;
    CarlaPluginBridgeThread fBridgeThread;

    BridgeAudioPool          fShmAudioPool;
    BridgeRtClientControl    fShmRtClientControl;
    BridgeNonRtClientControl fShmNonRtClientControl;
    BridgeNonRtServerControl fShmNonRtServerControl;

   #ifndef CARLA_OS_WIN
    CarlaString fWinePrefix;
   #endif

    class ReceivingParamText {
    public:
        ReceivingParamText() noexcept
            : dataRecv(false),
              dataOk(false),
              index(-1),
              strBuf(nullptr),
              mutex() {}

        bool isCurrentlyWaitingData() const noexcept
        {
            return index >= 0;
        }

        bool wasDataReceived(bool* const success) const noexcept
        {
            *success = dataOk;
            return dataRecv;
        }

        void setTargetData(const int32_t i, char* const b) noexcept
        {
            const CarlaMutexLocker cml(mutex);

            dataOk   = false;
            dataRecv = false;
            index    = i;
            strBuf   = b;
        }

        void setReceivedData(const int32_t i, const char* const b, const uint blen) noexcept
        {
            CarlaScopedValueSetter<bool> svs(dataRecv, false, true);

            const CarlaMutexLocker cml(mutex);

            // make backup and reset data
            const int32_t indexCopy = index;
            char* const strBufCopy = strBuf;
            index  = -1;
            strBuf = nullptr;

            CARLA_SAFE_ASSERT_RETURN(indexCopy == i,);
            CARLA_SAFE_ASSERT_RETURN(strBufCopy != nullptr,);

            std::strncpy(strBufCopy, b, std::min(blen, STR_MAX-1U));
            dataOk = true;
        }

    private:
        bool dataRecv;
        bool dataOk;
        int32_t index;
        char* strBuf;
        CarlaMutex mutex;

        CARLA_DECLARE_NON_COPYABLE(ReceivingParamText)
    } fReceivingParamText;

    struct Info {
        uint32_t aIns, aOuts;
        uint32_t cvIns, cvOuts;
        uint32_t mIns, mOuts;
        PluginCategory category;
        uint optionsAvailable;
        CarlaString name;
        CarlaString label;
        CarlaString maker;
        CarlaString copyright;
        const char** aInNames;
        const char** aOutNames;
        const char** cvInNames;
        const char** cvOutNames;
        std::vector<uint8_t> chunk;

        Info()
            : aIns(0),
              aOuts(0),
              cvIns(0),
              cvOuts(0),
              mIns(0),
              mOuts(0),
              category(PLUGIN_CATEGORY_NONE),
              optionsAvailable(0),
              name(),
              label(),
              maker(),
              copyright(),
              aInNames(nullptr),
              aOutNames(nullptr),
              cvInNames(nullptr),
              cvOutNames(nullptr),
              chunk() {}

        ~Info()
        {
            clear();
        }

        void clear()
        {
            if (aInNames != nullptr)
            {
                CARLA_SAFE_ASSERT_INT(aIns > 0, aIns);

                for (uint32_t i=0; i<aIns; ++i)
                    delete[] aInNames[i];

                delete[] aInNames;
                aInNames = nullptr;
            }

            if (aOutNames != nullptr)
            {
                CARLA_SAFE_ASSERT_INT(aOuts > 0, aOuts);

                for (uint32_t i=0; i<aOuts; ++i)
                    delete[] aOutNames[i];

                delete[] aOutNames;
                aOutNames = nullptr;
            }

            if (cvInNames != nullptr)
            {
                CARLA_SAFE_ASSERT_INT(cvIns > 0, cvIns);

                for (uint32_t i=0; i<cvIns; ++i)
                    delete[] cvInNames[i];

                delete[] cvInNames;
                cvInNames = nullptr;
            }

            if (cvOutNames != nullptr)
            {
                CARLA_SAFE_ASSERT_INT(cvOuts > 0, cvOuts);

                for (uint32_t i=0; i<cvOuts; ++i)
                    delete[] cvOutNames[i];

                delete[] cvOutNames;
                cvOutNames = nullptr;
            }

            aIns = aOuts = cvIns = cvOuts = 0;
        }

        CARLA_DECLARE_NON_COPYABLE(Info)
    } fInfo;

    int64_t  fUniqueId;
    uint32_t fLatency;

    BridgeParamInfo* fParams;

    void handleProcessStopped() noexcept
    {
        const bool wasActive = pData->active;
        pData->active = false;

        if (wasActive)
        {
#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
            pData->engine->callback(true, true,
                                    ENGINE_CALLBACK_PARAMETER_VALUE_CHANGED,
                                    pData->id,
                                    PARAMETER_ACTIVE,
                                    0, 0,
                                    0.0f,
                                    nullptr);
#endif
        }

        if (pData->hints & PLUGIN_HAS_CUSTOM_UI)
        {
            pData->engine->callback(true, true,
                                    ENGINE_CALLBACK_UI_STATE_CHANGED,
                                    pData->id,
                                    0,
                                    0, 0, 0.0f, nullptr);
        }
    }

    void resizeAudioPool(const uint32_t bufferSize)
    {
        fShmAudioPool.resize(bufferSize, fInfo.aIns+fInfo.aOuts, fInfo.cvIns+fInfo.cvOuts);

        fShmRtClientControl.writeOpcode(kPluginBridgeRtClientSetAudioPool);
        fShmRtClientControl.writeULong(static_cast<uint64_t>(fShmAudioPool.dataSize));
        fShmRtClientControl.commitWrite();

        waitForClient("resize-pool", 5000);
    }

    void waitForClient(const char* const action, const uint msecs)
    {
        CARLA_SAFE_ASSERT_RETURN(! fTimedOut,);
        CARLA_SAFE_ASSERT_RETURN(! fTimedError,);

        if (fShmRtClientControl.waitForClient(msecs))
            return;

        fTimedOut = true;
        carla_stderr2("waitForClient(%s) timed out", action);
    }

    bool restartBridgeThread()
    {
        fInitiated  = false;
        fInitError  = false;
        fTimedError = false;

        // reset memory
        fShmRtClientControl.data->procFlags = 0;
        carla_zeroStruct(fShmRtClientControl.data->timeInfo);
        carla_zeroBytes(fShmRtClientControl.data->midiOut, kBridgeRtClientDataMidiOutSize);

        fShmRtClientControl.clearData();
        fShmNonRtClientControl.clearData();
        fShmNonRtServerControl.clearData();

        fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientVersion);
        fShmNonRtClientControl.writeUInt(CARLA_PLUGIN_BRIDGE_API_VERSION_CURRENT);

        fShmNonRtClientControl.writeUInt(static_cast<uint32_t>(sizeof(BridgeRtClientData)));
        fShmNonRtClientControl.writeUInt(static_cast<uint32_t>(sizeof(BridgeNonRtClientData)));
        fShmNonRtClientControl.writeUInt(static_cast<uint32_t>(sizeof(BridgeNonRtServerData)));

        fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientInitialSetup);
        fShmNonRtClientControl.writeUInt(pData->engine->getBufferSize());
        fShmNonRtClientControl.writeDouble(pData->engine->getSampleRate());

        fShmNonRtClientControl.commitWrite();

        if (fShmAudioPool.dataSize != 0)
        {
            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientSetAudioPool);
            fShmRtClientControl.writeULong(static_cast<uint64_t>(fShmAudioPool.dataSize));
            fShmRtClientControl.commitWrite();
        }
        else
        {
            // testing dummy message
            fShmRtClientControl.writeOpcode(kPluginBridgeRtClientNull);
            fShmRtClientControl.commitWrite();
        }

        fBridgeThread.startThread();

        const bool needsEngineIdle = pData->engine->getType() != kEngineTypePlugin;
#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
        const bool needsCancelableAction = ! pData->engine->isLoadingProject();

        if (needsCancelableAction)
        {
            pData->engine->setActionCanceled(false);
            pData->engine->callback(true, true,
                                    ENGINE_CALLBACK_CANCELABLE_ACTION,
                                    pData->id,
                                    1,
                                    0, 0, 0.0f,
                                    "Loading plugin bridge");
        }
#endif

        for (;fBridgeThread.isThreadRunning();)
        {
            pData->engine->callback(true, true, ENGINE_CALLBACK_IDLE, 0, 0, 0, 0, 0.0f, nullptr);

            if (needsEngineIdle)
                pData->engine->idle();

            idle();

            if (fInitiated)
                break;
            if (pData->engine->isAboutToClose() || pData->engine->wasActionCanceled())
                break;

            carla_msleep(5);
        }

#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
        if (needsCancelableAction)
        {
            pData->engine->callback(true, true,
                                    ENGINE_CALLBACK_CANCELABLE_ACTION,
                                    pData->id,
                                    0,
                                    0, 0, 0.0f,
                                    "Loading plugin bridge");
        }
#endif

        if (fInitError || ! fInitiated)
        {
            fBridgeThread.stopThread(6000);

            if (! fInitError)
                pData->engine->setLastError("Timeout while waiting for a response from plugin-bridge\n"
                                            "(or the plugin crashed on initialization?)");

            return false;
        }

        if (const size_t dataSize = fInfo.chunk.size())
        {
#ifdef CARLA_PROPER_CPP11_SUPPORT
            void* data = fInfo.chunk.data();
#else
            void* data = &fInfo.chunk.front();
#endif
            CarlaString dataBase64(CarlaString::asBase64(data, dataSize));
            CARLA_SAFE_ASSERT_RETURN(dataBase64.length() > 0, true);

            String filePath(File::getSpecialLocation(File::tempDirectory).getFullPathName());

            filePath += CARLA_OS_SEP_STR ".CarlaChunk_";
            filePath += fShmAudioPool.getFilenameSuffix();

            if (File(filePath.toRawUTF8()).replaceWithText(dataBase64.buffer()))
            {
                const uint32_t ulength(static_cast<uint32_t>(filePath.length()));

                const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

                fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetChunkDataFile);
                fShmNonRtClientControl.writeUInt(ulength);
                fShmNonRtClientControl.writeCustomData(filePath.toRawUTF8(), ulength);
                fShmNonRtClientControl.commitWrite();
            }
        }

        return true;
    }

    void _setUiTitleFromName()
    {
        CarlaString uiName(pData->name);
        uiName += " (GUI)";

        const uint32_t size = static_cast<uint32_t>(uiName.length());

        const CarlaMutexLocker _cml(fShmNonRtClientControl.mutex);

        fShmNonRtClientControl.writeOpcode(kPluginBridgeNonRtClientSetWindowTitle);
        fShmNonRtClientControl.writeUInt(size);
        fShmNonRtClientControl.writeCustomData(uiName.buffer(), size);
        fShmNonRtClientControl.commitWrite();
    }

    CARLA_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(CarlaPluginBridge)
};

CARLA_BACKEND_END_NAMESPACE

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

CARLA_BACKEND_START_NAMESPACE

CarlaPluginPtr CarlaPlugin::newBridge(const Initializer& init,
                                      const BinaryType btype,
                                      const PluginType ptype,
                                      const char* const binaryArchName,
                                      const char* bridgeBinary)
{
    carla_debug("CarlaPlugin::newBridge({%p, \"%s\", \"%s\", \"%s\"}, %s, %s, \"%s\", \"%s\")",
                init.engine, init.filename, init.name, init.label,
                BinaryType2Str(btype), PluginType2Str(ptype), binaryArchName, bridgeBinary);

    if (bridgeBinary == nullptr || bridgeBinary[0] == '\0')
    {
        init.engine->setLastError("Bridge not possible, bridge-binary not found");
        return nullptr;
    }

#ifndef CARLA_OS_WIN
    // FIXME: somewhere, somehow, we end up with double slashes, wine doesn't like that.
    if (std::strncmp(bridgeBinary, "//", 2) == 0)
        ++bridgeBinary;
#endif

    std::shared_ptr<CarlaPluginBridge> plugin(new CarlaPluginBridge(init.engine, init.id, btype, ptype));

    if (! plugin->init(plugin, init.filename, init.name, init.label, init.uniqueId, init.options, binaryArchName, bridgeBinary))
        return nullptr;

    return plugin;
}

CARLA_BACKEND_END_NAMESPACE

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

#ifndef BUILD_BRIDGE
# include "CarlaBridgeUtils.cpp"
#endif

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