/* ------------------------------------------------------------
author: "Dominick Hing"
license: "MIT Style STK-4.2"
name: "stereo-to-mono"
version: "1.0"
Code generated with Faust 2.50.6 (https://faust.grame.fr)
Compilation options: -a faust2header.cpp -lang cpp -i -inpl -cn stereotomonodsp -es 1 -mcd
16 -single -ftz 0
------------------------------------------------------------ */

#ifndef __stereotomonodsp_H__
#define __stereotomonodsp_H__

// NOTE: ANY INCLUDE-GUARD HERE MUST BE DERIVED FROM THE CLASS NAME
//
// faust2header.cpp - FAUST Architecture File
// This is a simple variation of matlabplot.cpp in the Faust distribution
// aimed at creating a simple C++ header file (.h) containing a Faust DSP.
// See the Makefile for how to use it.

/************************** BEGIN dsp.h ********************************
 FAUST Architecture File
 Copyright (C) 2003-2022 GRAME, Centre National de Creation Musicale
 ---------------------------------------------------------------------
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 2.1 of the License, or
 (at your option) 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 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 EXCEPTION : As a special exception, you may create a larger work
 that contains this FAUST architecture section and distribute
 that work under terms of your choice, so long as this FAUST
 architecture section is not modified.
 ************************************************************************/

#ifndef __dsp__
#define __dsp__

#include <string>
#include <vector>

/************************************************************************
 ************************************************************************
    FAUST compiler
    Copyright (C) 2003-2018 GRAME, Centre National de Creation Musicale
    ---------------------------------------------------------------------
    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
    (at your option) 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.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 ************************************************************************
 ************************************************************************/

#ifndef __export__
#define __export__

#define FAUSTVERSION "2.50.6"

// Use FAUST_API for code that is part of the external API but is also compiled in faust
// and libfaust Use LIBFAUST_API for code that is compiled in faust and libfaust

#ifdef _WIN32
#pragma warning(disable : 4251)
#ifdef FAUST_EXE
#define FAUST_API
#define LIBFAUST_API
#elif FAUST_LIB
#define FAUST_API    __declspec(dllexport)
#define LIBFAUST_API __declspec(dllexport)
#else
#define FAUST_API
#define LIBFAUST_API
#endif
#else
#ifdef FAUST_EXE
#define FAUST_API
#define LIBFAUST_API
#else
#define FAUST_API    __attribute__((visibility("default")))
#define LIBFAUST_API __attribute__((visibility("default")))
#endif
#endif

#endif

#ifndef FAUSTFLOAT
#define FAUSTFLOAT float
#endif

struct FAUST_API UI;
struct FAUST_API Meta;

/**
 * DSP memory manager.
 */

struct FAUST_API dsp_memory_manager {
    virtual ~dsp_memory_manager() {}

    /**
     * Inform the Memory Manager with the number of expected memory zones.
     * @param count - the number of expected memory zones
     */
    virtual void begin(size_t /* count */) {}

    /**
     * Give the Memory Manager information on a given memory zone.
     * @param size - the size in bytes of the memory zone
     * @param reads - the number of Read access to the zone used to compute one frame
     * @param writes - the number of Write access to the zone used to compute one frame
     */
    virtual void info(size_t /* size */, size_t /* reads */, size_t /* writes */) {}

    /**
     * Inform the Memory Manager that all memory zones have been described,
     * to possibly start a 'compute the best allocation strategy' step.
     */
    virtual void end() {}

    /**
     * Allocate a memory zone.
     * @param size - the memory zone size in bytes
     */
    virtual void* allocate(size_t size) = 0;

    /**
     * Destroy a memory zone.
     * @param ptr - the memory zone pointer to be deallocated
     */
    virtual void destroy(void* ptr) = 0;
};

/**
 * Signal processor definition.
 */

class FAUST_API dsp
{
   public:
    dsp() {}
    virtual ~dsp() {}

    /* Return instance number of audio inputs */
    virtual int getNumInputs() = 0;

    /* Return instance number of audio outputs */
    virtual int getNumOutputs() = 0;

    /**
     * Trigger the ui_interface parameter with instance specific calls
     * to 'openTabBox', 'addButton', 'addVerticalSlider'... in order to build the UI.
     *
     * @param ui_interface - the user interface builder
     */
    virtual void buildUserInterface(UI* ui_interface) = 0;

    /* Return the sample rate currently used by the instance */
    virtual int getSampleRate() = 0;

    /**
     * Global init, calls the following methods:
     * - static class 'classInit': static tables initialization
     * - 'instanceInit': constants and instance state initialization
     *
     * @param sample_rate - the sampling rate in Hz
     */
    virtual void init(int sample_rate) = 0;

    /**
     * Init instance state
     *
     * @param sample_rate - the sampling rate in Hz
     */
    virtual void instanceInit(int sample_rate) = 0;

    /**
     * Init instance constant state
     *
     * @param sample_rate - the sampling rate in Hz
     */
    virtual void instanceConstants(int sample_rate) = 0;

    /* Init default control parameters values */
    virtual void instanceResetUserInterface() = 0;

    /* Init instance state (like delay lines...) but keep the control parameter values */
    virtual void instanceClear() = 0;

    /**
     * Return a clone of the instance.
     *
     * @return a copy of the instance on success, otherwise a null pointer.
     */
    virtual dsp* clone() = 0;

    /**
     * Trigger the Meta* parameter with instance specific calls to 'declare' (key, value)
     * metadata.
     *
     * @param m - the Meta* meta user
     */
    virtual void metadata(Meta* m) = 0;

    /**
     * DSP instance computation, to be called with successive in/out audio buffers.
     *
     * @param count - the number of frames to compute
     * @param inputs - the input audio buffers as an array of non-interleaved FAUSTFLOAT
     * samples (eiher float, double or quad)
     * @param outputs - the output audio buffers as an array of non-interleaved FAUSTFLOAT
     * samples (eiher float, double or quad)
     *
     */
    virtual void compute(int count, FAUSTFLOAT** inputs, FAUSTFLOAT** outputs) = 0;

    /**
     * DSP instance computation: alternative method to be used by subclasses.
     *
     * @param date_usec - the timestamp in microsec given by audio driver.
     * @param count - the number of frames to compute
     * @param inputs - the input audio buffers as an array of non-interleaved FAUSTFLOAT
     * samples (either float, double or quad)
     * @param outputs - the output audio buffers as an array of non-interleaved FAUSTFLOAT
     * samples (either float, double or quad)
     *
     */
    virtual void compute(double /*date_usec*/, int count, FAUSTFLOAT** inputs,
                         FAUSTFLOAT** outputs)
    {
        compute(count, inputs, outputs);
    }
};

/**
 * Generic DSP decorator.
 */

class FAUST_API decorator_dsp : public dsp
{
   protected:
    dsp* fDSP;

   public:
    decorator_dsp(dsp* dsp = nullptr) : fDSP(dsp) {}
    virtual ~decorator_dsp() { delete fDSP; }

    virtual int getNumInputs() { return fDSP->getNumInputs(); }
    virtual int getNumOutputs() { return fDSP->getNumOutputs(); }
    virtual void buildUserInterface(UI* ui_interface)
    {
        fDSP->buildUserInterface(ui_interface);
    }
    virtual int getSampleRate() { return fDSP->getSampleRate(); }
    virtual void init(int sample_rate) { fDSP->init(sample_rate); }
    virtual void instanceInit(int sample_rate) { fDSP->instanceInit(sample_rate); }
    virtual void instanceConstants(int sample_rate)
    {
        fDSP->instanceConstants(sample_rate);
    }
    virtual void instanceResetUserInterface() { fDSP->instanceResetUserInterface(); }
    virtual void instanceClear() { fDSP->instanceClear(); }
    virtual decorator_dsp* clone() { return new decorator_dsp(fDSP->clone()); }
    virtual void metadata(Meta* m) { fDSP->metadata(m); }
    // Beware: subclasses usually have to overload the two 'compute' methods
    virtual void compute(int count, FAUSTFLOAT** inputs, FAUSTFLOAT** outputs)
    {
        fDSP->compute(count, inputs, outputs);
    }
    virtual void compute(double date_usec, int count, FAUSTFLOAT** inputs,
                         FAUSTFLOAT** outputs)
    {
        fDSP->compute(date_usec, count, inputs, outputs);
    }
};

/**
 * DSP factory class, used with LLVM and Interpreter backends
 * to create DSP instances from a compiled DSP program.
 */

class FAUST_API dsp_factory
{
   protected:
    // So that to force sub-classes to use deleteDSPFactory(dsp_factory* factory);
    virtual ~dsp_factory() {}

   public:
    virtual std::string getName()                          = 0;
    virtual std::string getSHAKey()                        = 0;
    virtual std::string getDSPCode()                       = 0;
    virtual std::string getCompileOptions()                = 0;
    virtual std::vector<std::string> getLibraryList()      = 0;
    virtual std::vector<std::string> getIncludePathnames() = 0;

    virtual dsp* createDSPInstance() = 0;

    virtual void setMemoryManager(dsp_memory_manager* manager) = 0;
    virtual dsp_memory_manager* getMemoryManager()             = 0;
};

// Denormal handling

#if defined(__SSE__)
#include <xmmintrin.h>
#endif

class FAUST_API ScopedNoDenormals
{
   private:
    intptr_t fpsr = 0;

    void setFpStatusRegister(intptr_t fpsr_aux) noexcept
    {
#if defined(__arm64__) || defined(__aarch64__)
        asm volatile("msr fpcr, %0" : : "ri"(fpsr_aux));
#elif defined(__SSE__)
        // The volatile keyword here is needed to workaround a bug in AppleClang 13.0
        // which aggressively optimises away the variable otherwise
        volatile uint32_t fpsr_w = static_cast<uint32_t>(fpsr_aux);
        _mm_setcsr(fpsr_w);
#endif
    }

    void getFpStatusRegister() noexcept
    {
#if defined(__arm64__) || defined(__aarch64__)
        asm volatile("mrs %0, fpcr" : "=r"(fpsr));
#elif defined(__SSE__)
        fpsr          = static_cast<intptr_t>(_mm_getcsr());
#endif
    }

   public:
    ScopedNoDenormals() noexcept
    {
#if defined(__arm64__) || defined(__aarch64__)
        intptr_t mask = (1 << 24 /* FZ */);
#elif defined(__SSE__)
#if defined(__SSE2__)
        intptr_t mask = 0x8040;
#else
        intptr_t mask = 0x8000;
#endif
#else
        intptr_t mask = 0x0000;
#endif
        getFpStatusRegister();
        setFpStatusRegister(fpsr | mask);
    }

    ~ScopedNoDenormals() noexcept { setFpStatusRegister(fpsr); }
};

#define AVOIDDENORMALS ScopedNoDenormals ftz_scope;

#endif

/************************** END dsp.h **************************/
/************************** BEGIN APIUI.h *****************************
FAUST Architecture File
Copyright (C) 2003-2022 GRAME, Centre National de Creation Musicale
---------------------------------------------------------------------
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

EXCEPTION : As a special exception, you may create a larger work
that contains this FAUST architecture section and distribute
that work under terms of your choice, so long as this FAUST
architecture section is not modified.
************************************************************************/

#ifndef API_UI_H
#define API_UI_H

#include <stdio.h>

#include <map>
#include <sstream>
#include <string>
#include <vector>

/************************** BEGIN meta.h *******************************
 FAUST Architecture File
 Copyright (C) 2003-2022 GRAME, Centre National de Creation Musicale
 ---------------------------------------------------------------------
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 2.1 of the License, or
 (at your option) 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 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 EXCEPTION : As a special exception, you may create a larger work
 that contains this FAUST architecture section and distribute
 that work under terms of your choice, so long as this FAUST
 architecture section is not modified.
 ************************************************************************/

#ifndef __meta__
#define __meta__

/**
 The base class of Meta handler to be used in dsp::metadata(Meta* m) method to retrieve
 (key, value) metadata.
 */
struct FAUST_API Meta {
    virtual ~Meta() {}
    virtual void declare(const char* key, const char* value) = 0;
};

#endif
/**************************  END  meta.h **************************/
/************************** BEGIN UI.h *****************************
 FAUST Architecture File
 Copyright (C) 2003-2022 GRAME, Centre National de Creation Musicale
 ---------------------------------------------------------------------
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 2.1 of the License, or
 (at your option) 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 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 EXCEPTION : As a special exception, you may create a larger work
 that contains this FAUST architecture section and distribute
 that work under terms of your choice, so long as this FAUST
 architecture section is not modified.
 ********************************************************************/

#ifndef __UI_H__
#define __UI_H__

#ifndef FAUSTFLOAT
#define FAUSTFLOAT float
#endif

/*******************************************************************************
 * UI : Faust DSP User Interface
 * User Interface as expected by the buildUserInterface() method of a DSP.
 * This abstract class contains only the method that the Faust compiler can
 * generate to describe a DSP user interface.
 ******************************************************************************/

struct Soundfile;

template<typename REAL>
struct FAUST_API UIReal {
    UIReal() {}
    virtual ~UIReal() {}

    // -- widget's layouts

    virtual void openTabBox(const char* label)        = 0;
    virtual void openHorizontalBox(const char* label) = 0;
    virtual void openVerticalBox(const char* label)   = 0;
    virtual void closeBox()                           = 0;

    // -- active widgets

    virtual void addButton(const char* label, REAL* zone)      = 0;
    virtual void addCheckButton(const char* label, REAL* zone) = 0;
    virtual void addVerticalSlider(const char* label, REAL* zone, REAL init, REAL min,
                                   REAL max, REAL step)        = 0;
    virtual void addHorizontalSlider(const char* label, REAL* zone, REAL init, REAL min,
                                     REAL max, REAL step)      = 0;
    virtual void addNumEntry(const char* label, REAL* zone, REAL init, REAL min, REAL max,
                             REAL step)                        = 0;

    // -- passive widgets

    virtual void addHorizontalBargraph(const char* label, REAL* zone, REAL min,
                                       REAL max) = 0;
    virtual void addVerticalBargraph(const char* label, REAL* zone, REAL min,
                                     REAL max)   = 0;

    // -- soundfiles

    virtual void addSoundfile(const char* label, const char* filename,
                              Soundfile** sf_zone) = 0;

    // -- metadata declarations

    virtual void declare(REAL* /* zone */, const char* /* key */, const char* /* val */)
    {
    }

    // To be used by LLVM client
    virtual int sizeOfFAUSTFLOAT() { return sizeof(FAUSTFLOAT); }
};

struct FAUST_API UI : public UIReal<FAUSTFLOAT> {
    UI() {}
    virtual ~UI() {}
};

#endif
/**************************  END  UI.h **************************/
/************************** BEGIN PathBuilder.h **************************
 FAUST Architecture File
 Copyright (C) 2003-2022 GRAME, Centre National de Creation Musicale
 ---------------------------------------------------------------------
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 2.1 of the License, or
 (at your option) 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 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 EXCEPTION : As a special exception, you may create a larger work
 that contains this FAUST architecture section and distribute
 that work under terms of your choice, so long as this FAUST
 architecture section is not modified.
 ************************************************************************/

#ifndef __PathBuilder__
#define __PathBuilder__

#include <algorithm>
#include <map>
#include <regex>
#include <set>
#include <string>
#include <vector>

/*******************************************************************************
 * PathBuilder : Faust User Interface
 * Helper class to build complete hierarchical path for UI items.
 ******************************************************************************/

class FAUST_API PathBuilder
{
   protected:
    std::vector<std::string> fControlsLevel;
    std::vector<std::string> fFullPaths;
    std::map<std::string, std::string> fFull2Short;  // filled by computeShortNames()

    /**
     * @brief check if a character is acceptable for an ID
     *
     * @param c
     * @return true is the character is acceptable for an ID
     */
    bool isIDChar(char c) const
    {
        return ((c >= 'a') && (c <= 'z')) || ((c >= 'A') && (c <= 'Z'))
               || ((c >= '0') && (c <= '9'));
    }

    /**
     * @brief remove all "/0x00" parts
     *
     * @param src
     * @return modified string
     */
    std::string remove0x00(const std::string& src) const
    {
        return std::regex_replace(src, std::regex("/0x00"), "");
    }

    /**
     * @brief replace all non ID char with '_' (one '_' may replace several non ID char)
     *
     * @param src
     * @return modified string
     */
    std::string str2ID(const std::string& src) const
    {
        std::string dst;
        bool need_underscore = false;
        for (char c : src) {
            if (isIDChar(c) || (c == '/')) {
                if (need_underscore) {
                    dst.push_back('_');
                    need_underscore = false;
                }
                dst.push_back(c);
            } else {
                need_underscore = true;
            }
        }
        return dst;
    }

    /**
     * @brief Keep only the last n slash-parts
     *
     * @param src
     * @param n : 1 indicates the last slash-part
     * @return modified string
     */
    std::string cut(const std::string& src, int n) const
    {
        std::string rdst;
        for (int i = int(src.length()) - 1; i >= 0; i--) {
            char c = src[i];
            if (c != '/') {
                rdst.push_back(c);
            } else if (n == 1) {
                std::string dst;
                for (int j = int(rdst.length()) - 1; j >= 0; j--) {
                    dst.push_back(rdst[j]);
                }
                return dst;
            } else {
                n--;
                rdst.push_back(c);
            }
        }
        return src;
    }

    void addFullPath(const std::string& label) { fFullPaths.push_back(buildPath(label)); }

    /**
     * @brief Compute the mapping between full path and short names
     */
    void computeShortNames()
    {
        std::vector<std::string>
            uniquePaths;  // all full paths transformed but made unique with a prefix
        std::map<std::string, std::string>
            unique2full;  // all full paths transformed but made unique with a prefix
        char num_buffer[16];
        int pnum = 0;

        for (const auto& s : fFullPaths) {
            sprintf(num_buffer, "%d", pnum++);
            std::string u = "/P" + std::string(num_buffer) + str2ID(remove0x00(s));
            uniquePaths.push_back(u);
            unique2full[u] = s;  // remember the full path associated to a unique path
        }

        std::map<std::string, int> uniquePath2level;  // map path to level
        for (const auto& s : uniquePaths)
            uniquePath2level[s] = 1;  // we init all levels to 1
        bool have_collisions = true;

        while (have_collisions) {
            // compute collision list
            std::set<std::string> collisionSet;
            std::map<std::string, std::string> short2full;
            have_collisions = false;
            for (const auto& it : uniquePath2level) {
                std::string u         = it.first;
                int n                 = it.second;
                std::string shortName = cut(u, n);
                auto p                = short2full.find(shortName);
                if (p == short2full.end()) {
                    // no collision
                    short2full[shortName] = u;
                } else {
                    // we have a collision, add the two paths to the collision set
                    have_collisions = true;
                    collisionSet.insert(u);
                    collisionSet.insert(p->second);
                }
            }
            for (const auto& s : collisionSet)
                uniquePath2level[s]++;  // increase level of colliding path
        }

        for (const auto& it : uniquePath2level) {
            std::string u               = it.first;
            int n                       = it.second;
            std::string shortName       = replaceCharList(cut(u, n), {'/'}, '_');
            fFull2Short[unique2full[u]] = shortName;
        }
    }

    std::string replaceCharList(const std::string& str, const std::vector<char>& ch1,
                                char ch2)
    {
        auto beg        = ch1.begin();
        auto end        = ch1.end();
        std::string res = str;
        for (size_t i = 0; i < str.length(); ++i) {
            if (std::find(beg, end, str[i]) != end)
                res[i] = ch2;
        }
        return res;
    }

   public:
    PathBuilder() {}
    virtual ~PathBuilder() {}

    // Return true for the first level of groups
    bool pushLabel(const std::string& label)
    {
        fControlsLevel.push_back(label);
        return fControlsLevel.size() == 1;
    }

    // Return true for the last level of groups
    bool popLabel()
    {
        fControlsLevel.pop_back();
        return fControlsLevel.size() == 0;
    }

    std::string buildPath(const std::string& label)
    {
        std::string res = "/";
        for (size_t i = 0; i < fControlsLevel.size(); i++) {
            res = res + fControlsLevel[i] + "/";
        }
        res += label;
        return replaceCharList(
            res, {' ', '#', '*', ',', '?', '[', ']', '{', '}', '(', ')'}, '_');
    }
};

#endif  // __PathBuilder__
/**************************  END  PathBuilder.h **************************/
/************************** BEGIN ValueConverter.h ********************
 FAUST Architecture File
 Copyright (C) 2003-2022 GRAME, Centre National de Creation Musicale
 ---------------------------------------------------------------------
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 2.1 of the License, or
 (at your option) 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 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 EXCEPTION : As a special exception, you may create a larger work
 that contains this FAUST architecture section and distribute
 that work under terms of your choice, so long as this FAUST
 architecture section is not modified.
 ********************************************************************/

#ifndef __ValueConverter__
#define __ValueConverter__

/***************************************************************************************
 ValueConverter.h
 (GRAME, Copyright 2015-2019)

 Set of conversion objects used to map user interface values (for example a gui slider
 delivering values between 0 and 1) to faust values (for example a vslider between
 20 and 20000) using a log scale.

 -- Utilities

 Range(lo,hi) : clip a value x between lo and hi
 Interpolator(lo,hi,v1,v2) : Maps a value x between lo and hi to a value y between v1 and
v2 Interpolator3pt(lo,mi,hi,v1,vm,v2) : Map values between lo mid hi to values between v1
vm v2

 -- Value Converters

 ValueConverter::ui2faust(x)
 ValueConverter::faust2ui(x)

 -- ValueConverters used for sliders depending of the scale

 LinearValueConverter(umin, umax, fmin, fmax)
 LinearValueConverter2(lo, mi, hi, v1, vm, v2) using 2 segments
 LogValueConverter(umin, umax, fmin, fmax)
 ExpValueConverter(umin, umax, fmin, fmax)

 -- ValueConverters used for accelerometers based on 3 points

 AccUpConverter(amin, amid, amax, fmin, fmid, fmax)        -- curve 0
 AccDownConverter(amin, amid, amax, fmin, fmid, fmax)      -- curve 1
 AccUpDownConverter(amin, amid, amax, fmin, fmid, fmax)    -- curve 2
 AccDownUpConverter(amin, amid, amax, fmin, fmid, fmax)    -- curve 3

 -- lists of ZoneControl are used to implement accelerometers metadata for each axes

 ZoneControl(zone, valueConverter) : a zone with an accelerometer data converter

 -- ZoneReader are used to implement screencolor metadata

 ZoneReader(zone, valueConverter) : a zone with a data converter

****************************************************************************************/

#include <assert.h>
#include <float.h>

#include <algorithm>  // std::max
#include <cmath>
#include <vector>

//--------------------------------------------------------------------------------------
// Interpolator(lo,hi,v1,v2)
// Maps a value x between lo and hi to a value y between v1 and v2
// y = v1 + (x-lo)/(hi-lo)*(v2-v1)
// y = v1 + (x-lo) * coef           with coef = (v2-v1)/(hi-lo)
// y = v1 + x*coef - lo*coef
// y = v1 - lo*coef + x*coef
// y = offset + x*coef              with offset = v1 - lo*coef
//--------------------------------------------------------------------------------------
class FAUST_API Interpolator
{
   private:
    //--------------------------------------------------------------------------------------
    // Range(lo,hi) clip a value between lo and hi
    //--------------------------------------------------------------------------------------
    struct Range {
        double fLo;
        double fHi;

        Range(double x, double y)
            : fLo(std::min<double>(x, y)), fHi(std::max<double>(x, y))
        {
        }
        double operator()(double x) { return (x < fLo) ? fLo : (x > fHi) ? fHi : x; }
    };

    Range fRange;
    double fCoef;
    double fOffset;

   public:
    Interpolator(double lo, double hi, double v1, double v2) : fRange(lo, hi)
    {
        if (hi != lo) {
            // regular case
            fCoef   = (v2 - v1) / (hi - lo);
            fOffset = v1 - lo * fCoef;
        } else {
            // degenerate case, avoids division by zero
            fCoef   = 0;
            fOffset = (v1 + v2) / 2;
        }
    }
    double operator()(double v)
    {
        double x = fRange(v);
        return fOffset + x * fCoef;
    }

    void getLowHigh(double& amin, double& amax)
    {
        amin = fRange.fLo;
        amax = fRange.fHi;
    }
};

//--------------------------------------------------------------------------------------
// Interpolator3pt(lo,mi,hi,v1,vm,v2)
// Map values between lo mid hi to values between v1 vm v2
//--------------------------------------------------------------------------------------
class FAUST_API Interpolator3pt
{
   private:
    Interpolator fSegment1;
    Interpolator fSegment2;
    double fMid;

   public:
    Interpolator3pt(double lo, double mi, double hi, double v1, double vm, double v2)
        : fSegment1(lo, mi, v1, vm), fSegment2(mi, hi, vm, v2), fMid(mi)
    {
    }
    double operator()(double x) { return (x < fMid) ? fSegment1(x) : fSegment2(x); }

    void getMappingValues(double& amin, double& amid, double& amax)
    {
        fSegment1.getLowHigh(amin, amid);
        fSegment2.getLowHigh(amid, amax);
    }
};

//--------------------------------------------------------------------------------------
// Abstract ValueConverter class. Converts values between UI and Faust representations
//--------------------------------------------------------------------------------------
class FAUST_API ValueConverter
{
   public:
    virtual ~ValueConverter() {}
    virtual double ui2faust(double x) { return x; };
    virtual double faust2ui(double x) { return x; };
};

//--------------------------------------------------------------------------------------
// A converter than can be updated
//--------------------------------------------------------------------------------------

class FAUST_API UpdatableValueConverter : public ValueConverter
{
   protected:
    bool fActive;

   public:
    UpdatableValueConverter() : fActive(true) {}
    virtual ~UpdatableValueConverter() {}

    virtual void setMappingValues(double amin, double amid, double amax, double min,
                                  double init, double max)                  = 0;
    virtual void getMappingValues(double& amin, double& amid, double& amax) = 0;

    void setActive(bool on_off) { fActive = on_off; }
    bool getActive() { return fActive; }
};

//--------------------------------------------------------------------------------------
// Linear conversion between ui and Faust values
//--------------------------------------------------------------------------------------
class FAUST_API LinearValueConverter : public ValueConverter
{
   private:
    Interpolator fUI2F;
    Interpolator fF2UI;

   public:
    LinearValueConverter(double umin, double umax, double fmin, double fmax)
        : fUI2F(umin, umax, fmin, fmax), fF2UI(fmin, fmax, umin, umax)
    {
    }

    LinearValueConverter() : fUI2F(0., 0., 0., 0.), fF2UI(0., 0., 0., 0.) {}
    virtual double ui2faust(double x) { return fUI2F(x); }
    virtual double faust2ui(double x) { return fF2UI(x); }
};

//--------------------------------------------------------------------------------------
// Two segments linear conversion between ui and Faust values
//--------------------------------------------------------------------------------------
class FAUST_API LinearValueConverter2 : public UpdatableValueConverter
{
   private:
    Interpolator3pt fUI2F;
    Interpolator3pt fF2UI;

   public:
    LinearValueConverter2(double amin, double amid, double amax, double min, double init,
                          double max)
        : fUI2F(amin, amid, amax, min, init, max), fF2UI(min, init, max, amin, amid, amax)
    {
    }

    LinearValueConverter2() : fUI2F(0., 0., 0., 0., 0., 0.), fF2UI(0., 0., 0., 0., 0., 0.)
    {
    }

    virtual double ui2faust(double x) { return fUI2F(x); }
    virtual double faust2ui(double x) { return fF2UI(x); }

    virtual void setMappingValues(double amin, double amid, double amax, double min,
                                  double init, double max)
    {
        fUI2F = Interpolator3pt(amin, amid, amax, min, init, max);
        fF2UI = Interpolator3pt(min, init, max, amin, amid, amax);
    }

    virtual void getMappingValues(double& amin, double& amid, double& amax)
    {
        fUI2F.getMappingValues(amin, amid, amax);
    }
};

//--------------------------------------------------------------------------------------
// Logarithmic conversion between ui and Faust values
//--------------------------------------------------------------------------------------
class FAUST_API LogValueConverter : public LinearValueConverter
{
   public:
    LogValueConverter(double umin, double umax, double fmin, double fmax)
        : LinearValueConverter(umin, umax, std::log(std::max<double>(DBL_MIN, fmin)),
                               std::log(std::max<double>(DBL_MIN, fmax)))
    {
    }

    virtual double ui2faust(double x)
    {
        return std::exp(LinearValueConverter::ui2faust(x));
    }
    virtual double faust2ui(double x)
    {
        return LinearValueConverter::faust2ui(std::log(std::max<double>(x, DBL_MIN)));
    }
};

//--------------------------------------------------------------------------------------
// Exponential conversion between ui and Faust values
//--------------------------------------------------------------------------------------
class FAUST_API ExpValueConverter : public LinearValueConverter
{
   public:
    ExpValueConverter(double umin, double umax, double fmin, double fmax)
        : LinearValueConverter(umin, umax, std::min<double>(DBL_MAX, std::exp(fmin)),
                               std::min<double>(DBL_MAX, std::exp(fmax)))
    {
    }

    virtual double ui2faust(double x)
    {
        return std::log(LinearValueConverter::ui2faust(x));
    }
    virtual double faust2ui(double x)
    {
        return LinearValueConverter::faust2ui(std::min<double>(DBL_MAX, std::exp(x)));
    }
};

//--------------------------------------------------------------------------------------
// Convert accelerometer or gyroscope values to Faust values
// Using an Up curve (curve 0)
//--------------------------------------------------------------------------------------
class FAUST_API AccUpConverter : public UpdatableValueConverter
{
   private:
    Interpolator3pt fA2F;
    Interpolator3pt fF2A;

   public:
    AccUpConverter(double amin, double amid, double amax, double fmin, double fmid,
                   double fmax)
        : fA2F(amin, amid, amax, fmin, fmid, fmax)
        , fF2A(fmin, fmid, fmax, amin, amid, amax)
    {
    }

    virtual double ui2faust(double x) { return fA2F(x); }
    virtual double faust2ui(double x) { return fF2A(x); }

    virtual void setMappingValues(double amin, double amid, double amax, double fmin,
                                  double fmid, double fmax)
    {
        //__android_log_print(ANDROID_LOG_ERROR, "Faust", "AccUpConverter update %f %f %f
        //%f %f %f", amin,amid,amax,fmin,fmid,fmax);
        fA2F = Interpolator3pt(amin, amid, amax, fmin, fmid, fmax);
        fF2A = Interpolator3pt(fmin, fmid, fmax, amin, amid, amax);
    }

    virtual void getMappingValues(double& amin, double& amid, double& amax)
    {
        fA2F.getMappingValues(amin, amid, amax);
    }
};

//--------------------------------------------------------------------------------------
// Convert accelerometer or gyroscope values to Faust values
// Using a Down curve (curve 1)
//--------------------------------------------------------------------------------------
class FAUST_API AccDownConverter : public UpdatableValueConverter
{
   private:
    Interpolator3pt fA2F;
    Interpolator3pt fF2A;

   public:
    AccDownConverter(double amin, double amid, double amax, double fmin, double fmid,
                     double fmax)
        : fA2F(amin, amid, amax, fmax, fmid, fmin)
        , fF2A(fmin, fmid, fmax, amax, amid, amin)
    {
    }

    virtual double ui2faust(double x) { return fA2F(x); }
    virtual double faust2ui(double x) { return fF2A(x); }

    virtual void setMappingValues(double amin, double amid, double amax, double fmin,
                                  double fmid, double fmax)
    {
        //__android_log_print(ANDROID_LOG_ERROR, "Faust", "AccDownConverter update %f %f
        //%f %f %f %f", amin,amid,amax,fmin,fmid,fmax);
        fA2F = Interpolator3pt(amin, amid, amax, fmax, fmid, fmin);
        fF2A = Interpolator3pt(fmin, fmid, fmax, amax, amid, amin);
    }

    virtual void getMappingValues(double& amin, double& amid, double& amax)
    {
        fA2F.getMappingValues(amin, amid, amax);
    }
};

//--------------------------------------------------------------------------------------
// Convert accelerometer or gyroscope values to Faust values
// Using an Up-Down curve (curve 2)
//--------------------------------------------------------------------------------------
class FAUST_API AccUpDownConverter : public UpdatableValueConverter
{
   private:
    Interpolator3pt fA2F;
    Interpolator fF2A;

   public:
    AccUpDownConverter(double amin, double amid, double amax, double fmin,
                       double /* fmid */, double fmax)
        : fA2F(amin, amid, amax, fmin, fmax, fmin)
        , fF2A(fmin, fmax, amin,
               amax)  // Special, pseudo inverse of a non monotonic function
    {
    }

    virtual double ui2faust(double x) { return fA2F(x); }
    virtual double faust2ui(double x) { return fF2A(x); }

    virtual void setMappingValues(double amin, double amid, double amax, double fmin,
                                  double /* fmid */, double fmax)
    {
        //__android_log_print(ANDROID_LOG_ERROR, "Faust", "AccUpDownConverter update %f %f
        //%f %f %f %f", amin,amid,amax,fmin,fmid,fmax);
        fA2F = Interpolator3pt(amin, amid, amax, fmin, fmax, fmin);
        fF2A = Interpolator(fmin, fmax, amin, amax);
    }

    virtual void getMappingValues(double& amin, double& amid, double& amax)
    {
        fA2F.getMappingValues(amin, amid, amax);
    }
};

//--------------------------------------------------------------------------------------
// Convert accelerometer or gyroscope values to Faust values
// Using a Down-Up curve (curve 3)
//--------------------------------------------------------------------------------------
class FAUST_API AccDownUpConverter : public UpdatableValueConverter
{
   private:
    Interpolator3pt fA2F;
    Interpolator fF2A;

   public:
    AccDownUpConverter(double amin, double amid, double amax, double fmin,
                       double /* fmid */, double fmax)
        : fA2F(amin, amid, amax, fmax, fmin, fmax)
        , fF2A(fmin, fmax, amin,
               amax)  // Special, pseudo inverse of a non monotonic function
    {
    }

    virtual double ui2faust(double x) { return fA2F(x); }
    virtual double faust2ui(double x) { return fF2A(x); }

    virtual void setMappingValues(double amin, double amid, double amax, double fmin,
                                  double /* fmid */, double fmax)
    {
        //__android_log_print(ANDROID_LOG_ERROR, "Faust", "AccDownUpConverter update %f %f
        //%f %f %f %f", amin,amid,amax,fmin,fmid,fmax);
        fA2F = Interpolator3pt(amin, amid, amax, fmax, fmin, fmax);
        fF2A = Interpolator(fmin, fmax, amin, amax);
    }

    virtual void getMappingValues(double& amin, double& amid, double& amax)
    {
        fA2F.getMappingValues(amin, amid, amax);
    }
};

//--------------------------------------------------------------------------------------
// Base class for ZoneControl
//--------------------------------------------------------------------------------------
class FAUST_API ZoneControl
{
   protected:
    FAUSTFLOAT* fZone;

   public:
    ZoneControl(FAUSTFLOAT* zone) : fZone(zone) {}
    virtual ~ZoneControl() {}

    virtual void update(double /* v */) const {}

    virtual void setMappingValues(int /* curve */, double /* amin */, double /* amid */,
                                  double /* amax */, double /* min */, double /* init */,
                                  double /* max */)
    {
    }
    virtual void getMappingValues(double& /* amin */, double& /* amid */,
                                  double& /* amax */)
    {
    }

    FAUSTFLOAT* getZone() { return fZone; }

    virtual void setActive(bool /* on_off */) {}
    virtual bool getActive() { return false; }

    virtual int getCurve() { return -1; }
};

//--------------------------------------------------------------------------------------
//  Useful to implement accelerometers metadata as a list of ZoneControl for each axes
//--------------------------------------------------------------------------------------
class FAUST_API ConverterZoneControl : public ZoneControl
{
   protected:
    ValueConverter* fValueConverter;

   public:
    ConverterZoneControl(FAUSTFLOAT* zone, ValueConverter* converter)
        : ZoneControl(zone), fValueConverter(converter)
    {
    }
    virtual ~ConverterZoneControl()
    {
        delete fValueConverter;
    }  // Assuming fValueConverter is not kept elsewhere...

    virtual void update(double v) const
    {
        *fZone = FAUSTFLOAT(fValueConverter->ui2faust(v));
    }

    ValueConverter* getConverter() { return fValueConverter; }
};

//--------------------------------------------------------------------------------------
// Association of a zone and a four value converter, each one for each possible curve.
// Useful to implement accelerometers metadata as a list of ZoneControl for each axes
//--------------------------------------------------------------------------------------
class FAUST_API CurveZoneControl : public ZoneControl
{
   private:
    std::vector<UpdatableValueConverter*> fValueConverters;
    int fCurve;

   public:
    CurveZoneControl(FAUSTFLOAT* zone, int curve, double amin, double amid, double amax,
                     double min, double init, double max)
        : ZoneControl(zone), fCurve(0)
    {
        assert(curve >= 0 && curve <= 3);
        fValueConverters.push_back(new AccUpConverter(amin, amid, amax, min, init, max));
        fValueConverters.push_back(
            new AccDownConverter(amin, amid, amax, min, init, max));
        fValueConverters.push_back(
            new AccUpDownConverter(amin, amid, amax, min, init, max));
        fValueConverters.push_back(
            new AccDownUpConverter(amin, amid, amax, min, init, max));
        fCurve = curve;
    }
    virtual ~CurveZoneControl()
    {
        for (const auto& it : fValueConverters) {
            delete it;
        }
    }
    void update(double v) const
    {
        if (fValueConverters[fCurve]->getActive())
            *fZone = FAUSTFLOAT(fValueConverters[fCurve]->ui2faust(v));
    }

    void setMappingValues(int curve, double amin, double amid, double amax, double min,
                          double init, double max)
    {
        fValueConverters[curve]->setMappingValues(amin, amid, amax, min, init, max);
        fCurve = curve;
    }

    void getMappingValues(double& amin, double& amid, double& amax)
    {
        fValueConverters[fCurve]->getMappingValues(amin, amid, amax);
    }

    void setActive(bool on_off)
    {
        for (const auto& it : fValueConverters) {
            it->setActive(on_off);
        }
    }

    int getCurve() { return fCurve; }
};

class FAUST_API ZoneReader
{
   private:
    FAUSTFLOAT* fZone;
    Interpolator fInterpolator;

   public:
    ZoneReader(FAUSTFLOAT* zone, double lo, double hi)
        : fZone(zone), fInterpolator(lo, hi, 0, 255)
    {
    }

    virtual ~ZoneReader() {}

    int getValue() { return (fZone != nullptr) ? int(fInterpolator(*fZone)) : 127; }
};

#endif
/**************************  END  ValueConverter.h **************************/

typedef unsigned int uint;

class APIUI
    : public PathBuilder
    , public Meta
    , public UI
{
   public:
    enum ItemType {
        kButton = 0,
        kCheckButton,
        kVSlider,
        kHSlider,
        kNumEntry,
        kHBargraph,
        kVBargraph
    };
    enum Type { kAcc = 0, kGyr = 1, kNoType };

   protected:
    enum Mapping { kLin = 0, kLog = 1, kExp = 2 };

    struct Item {
        std::string fLabel;
        std::string fShortname;
        std::string fPath;
        ValueConverter* fConversion;
        FAUSTFLOAT* fZone;
        FAUSTFLOAT fInit;
        FAUSTFLOAT fMin;
        FAUSTFLOAT fMax;
        FAUSTFLOAT fStep;
        ItemType fItemType;

        Item(const std::string& label, const std::string& short_name,
             const std::string& path, ValueConverter* conversion, FAUSTFLOAT* zone,
             FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step,
             ItemType item_type)
            : fLabel(label)
            , fShortname(short_name)
            , fPath(path)
            , fConversion(conversion)
            , fZone(zone)
            , fInit(init)
            , fMin(min)
            , fMax(max)
            , fStep(step)
            , fItemType(item_type)
        {
        }
    };
    std::vector<Item> fItems;

    std::vector<std::map<std::string, std::string> > fMetaData;
    std::vector<ZoneControl*> fAcc[3];
    std::vector<ZoneControl*> fGyr[3];

    // Screen color control
    // "...[screencolor:red]..." etc.
    bool fHasScreenControl;  // true if control screen color metadata
    ZoneReader* fRedReader;
    ZoneReader* fGreenReader;
    ZoneReader* fBlueReader;

    // Current values controlled by metadata
    std::string fCurrentUnit;
    int fCurrentScale;
    std::string fCurrentAcc;
    std::string fCurrentGyr;
    std::string fCurrentColor;
    std::string fCurrentTooltip;
    std::map<std::string, std::string> fCurrentMetadata;

    // Add a generic parameter
    virtual void addParameter(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init,
                              FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step,
                              ItemType type)
    {
        std::string path = buildPath(label);
        fFullPaths.push_back(path);

        // handle scale metadata
        ValueConverter* converter = nullptr;
        switch (fCurrentScale) {
        case kLin:
            converter = new LinearValueConverter(0, 1, min, max);
            break;
        case kLog:
            converter = new LogValueConverter(0, 1, min, max);
            break;
        case kExp:
            converter = new ExpValueConverter(0, 1, min, max);
            break;
        }
        fCurrentScale = kLin;

        fItems.push_back(
            Item(label, "", path, converter, zone, init, min, max, step, type));

        if (fCurrentAcc.size() > 0 && fCurrentGyr.size() > 0) {
            fprintf(
                stderr,
                "warning : 'acc' and 'gyr' metadata used for the same %s parameter !!\n",
                label);
        }

        // handle acc metadata "...[acc : <axe> <curve> <amin> <amid> <amax>]..."
        if (fCurrentAcc.size() > 0) {
            std::istringstream iss(fCurrentAcc);
            int axe, curve;
            double amin, amid, amax;
            iss >> axe >> curve >> amin >> amid >> amax;

            if ((0 <= axe) && (axe < 3) && (0 <= curve) && (curve < 4) && (amin < amax)
                && (amin <= amid) && (amid <= amax)) {
                fAcc[axe].push_back(
                    new CurveZoneControl(zone, curve, amin, amid, amax, min, init, max));
            } else {
                fprintf(stderr, "incorrect acc metadata : %s \n", fCurrentAcc.c_str());
            }
            fCurrentAcc = "";
        }

        // handle gyr metadata "...[gyr : <axe> <curve> <amin> <amid> <amax>]..."
        if (fCurrentGyr.size() > 0) {
            std::istringstream iss(fCurrentGyr);
            int axe, curve;
            double amin, amid, amax;
            iss >> axe >> curve >> amin >> amid >> amax;

            if ((0 <= axe) && (axe < 3) && (0 <= curve) && (curve < 4) && (amin < amax)
                && (amin <= amid) && (amid <= amax)) {
                fGyr[axe].push_back(
                    new CurveZoneControl(zone, curve, amin, amid, amax, min, init, max));
            } else {
                fprintf(stderr, "incorrect gyr metadata : %s \n", fCurrentGyr.c_str());
            }
            fCurrentGyr = "";
        }

        // handle screencolor metadata "...[screencolor:red|green|blue|white]..."
        if (fCurrentColor.size() > 0) {
            if ((fCurrentColor == "red") && (fRedReader == nullptr)) {
                fRedReader        = new ZoneReader(zone, min, max);
                fHasScreenControl = true;
            } else if ((fCurrentColor == "green") && (fGreenReader == nullptr)) {
                fGreenReader      = new ZoneReader(zone, min, max);
                fHasScreenControl = true;
            } else if ((fCurrentColor == "blue") && (fBlueReader == nullptr)) {
                fBlueReader       = new ZoneReader(zone, min, max);
                fHasScreenControl = true;
            } else if ((fCurrentColor == "white") && (fRedReader == nullptr)
                       && (fGreenReader == nullptr) && (fBlueReader == nullptr)) {
                fRedReader        = new ZoneReader(zone, min, max);
                fGreenReader      = new ZoneReader(zone, min, max);
                fBlueReader       = new ZoneReader(zone, min, max);
                fHasScreenControl = true;
            } else {
                fprintf(stderr, "incorrect screencolor metadata : %s \n",
                        fCurrentColor.c_str());
            }
        }
        fCurrentColor = "";

        fMetaData.push_back(fCurrentMetadata);
        fCurrentMetadata.clear();
    }

    int getZoneIndex(std::vector<ZoneControl*>* table, int p, int val)
    {
        FAUSTFLOAT* zone = fItems[uint(p)].fZone;
        for (size_t i = 0; i < table[val].size(); i++) {
            if (zone == table[val][i]->getZone())
                return int(i);
        }
        return -1;
    }

    void setConverter(std::vector<ZoneControl*>* table, int p, int val, int curve,
                      double amin, double amid, double amax)
    {
        int id1 = getZoneIndex(table, p, 0);
        int id2 = getZoneIndex(table, p, 1);
        int id3 = getZoneIndex(table, p, 2);

        // Deactivates everywhere..
        if (id1 != -1)
            table[0][uint(id1)]->setActive(false);
        if (id2 != -1)
            table[1][uint(id2)]->setActive(false);
        if (id3 != -1)
            table[2][uint(id3)]->setActive(false);

        if (val == -1) {  // Means: no more mapping...
            // So stay all deactivated...
        } else {
            int id4 = getZoneIndex(table, p, val);
            if (id4 != -1) {
                // Reactivate the one we edit...
                table[val][uint(id4)]->setMappingValues(
                    curve, amin, amid, amax, fItems[uint(p)].fMin, fItems[uint(p)].fInit,
                    fItems[uint(p)].fMax);
                table[val][uint(id4)]->setActive(true);
            } else {
                // Allocate a new CurveZoneControl which is 'active' by default
                FAUSTFLOAT* zone = fItems[uint(p)].fZone;
                table[val].push_back(new CurveZoneControl(
                    zone, curve, amin, amid, amax, fItems[uint(p)].fMin,
                    fItems[uint(p)].fInit, fItems[uint(p)].fMax));
            }
        }
    }

    void getConverter(std::vector<ZoneControl*>* table, int p, int& val, int& curve,
                      double& amin, double& amid, double& amax)
    {
        int id1 = getZoneIndex(table, p, 0);
        int id2 = getZoneIndex(table, p, 1);
        int id3 = getZoneIndex(table, p, 2);

        if (id1 != -1) {
            val   = 0;
            curve = table[val][uint(id1)]->getCurve();
            table[val][uint(id1)]->getMappingValues(amin, amid, amax);
        } else if (id2 != -1) {
            val   = 1;
            curve = table[val][uint(id2)]->getCurve();
            table[val][uint(id2)]->getMappingValues(amin, amid, amax);
        } else if (id3 != -1) {
            val   = 2;
            curve = table[val][uint(id3)]->getCurve();
            table[val][uint(id3)]->getMappingValues(amin, amid, amax);
        } else {
            val   = -1;  // No mapping
            curve = 0;
            amin  = -100.;
            amid  = 0.;
            amax  = 100.;
        }
    }

   public:
    APIUI()
        : fHasScreenControl(false)
        , fRedReader(nullptr)
        , fGreenReader(nullptr)
        , fBlueReader(nullptr)
        , fCurrentScale(kLin)
    {
    }

    virtual ~APIUI()
    {
        for (const auto& it : fItems)
            delete it.fConversion;
        for (int i = 0; i < 3; i++) {
            for (const auto& it : fAcc[i])
                delete it;
            for (const auto& it : fGyr[i])
                delete it;
        }
        delete fRedReader;
        delete fGreenReader;
        delete fBlueReader;
    }

    // -- widget's layouts

    virtual void openTabBox(const char* label) { pushLabel(label); }
    virtual void openHorizontalBox(const char* label) { pushLabel(label); }
    virtual void openVerticalBox(const char* label) { pushLabel(label); }
    virtual void closeBox()
    {
        if (popLabel()) {
            // Shortnames can be computed when all fullnames are known
            computeShortNames();
            // Fill 'shortname' field for each item
            for (const auto& it : fFull2Short) {
                int index                = getParamIndex(it.first.c_str());
                fItems[index].fShortname = it.second;
            }
        }
    }

    // -- active widgets

    virtual void addButton(const char* label, FAUSTFLOAT* zone)
    {
        addParameter(label, zone, 0, 0, 1, 1, kButton);
    }

    virtual void addCheckButton(const char* label, FAUSTFLOAT* zone)
    {
        addParameter(label, zone, 0, 0, 1, 1, kCheckButton);
    }

    virtual void addVerticalSlider(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init,
                                   FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step)
    {
        addParameter(label, zone, init, min, max, step, kVSlider);
    }

    virtual void addHorizontalSlider(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init,
                                     FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step)
    {
        addParameter(label, zone, init, min, max, step, kHSlider);
    }

    virtual void addNumEntry(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init,
                             FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step)
    {
        addParameter(label, zone, init, min, max, step, kNumEntry);
    }

    // -- passive widgets

    virtual void addHorizontalBargraph(const char* label, FAUSTFLOAT* zone,
                                       FAUSTFLOAT min, FAUSTFLOAT max)
    {
        addParameter(label, zone, min, min, max, (max - min) / 1000.0f, kHBargraph);
    }

    virtual void addVerticalBargraph(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT min,
                                     FAUSTFLOAT max)
    {
        addParameter(label, zone, min, min, max, (max - min) / 1000.0f, kVBargraph);
    }

    // -- soundfiles

    virtual void addSoundfile(const char* /* label */, const char* /* filename */,
                              Soundfile** /* sf_zone */)
    {
    }

    // -- metadata declarations

    virtual void declare(FAUSTFLOAT* /* zone */, const char* key, const char* val)
    {
        // Keep metadata
        fCurrentMetadata[key] = val;

        if (strcmp(key, "scale") == 0) {
            if (strcmp(val, "log") == 0) {
                fCurrentScale = kLog;
            } else if (strcmp(val, "exp") == 0) {
                fCurrentScale = kExp;
            } else {
                fCurrentScale = kLin;
            }
        } else if (strcmp(key, "unit") == 0) {
            fCurrentUnit = val;
        } else if (strcmp(key, "acc") == 0) {
            fCurrentAcc = val;
        } else if (strcmp(key, "gyr") == 0) {
            fCurrentGyr = val;
        } else if (strcmp(key, "screencolor") == 0) {
            fCurrentColor = val;  // val = "red", "green", "blue" or "white"
        } else if (strcmp(key, "tooltip") == 0) {
            fCurrentTooltip = val;
        }
    }

    virtual void declare(const char* /* key */, const char* /* val */) {}

    //-------------------------------------------------------------------------------
    // Simple API part
    //-------------------------------------------------------------------------------

    /**
     * Return the number of parameters in the UI.
     *
     * @return the number of parameters
     */
    int getParamsCount() { return int(fItems.size()); }

    /**
     * Return the param index.
     *
     * @param str - the UI parameter label/shortname/path
     *
     * @return the param index
     */
    int getParamIndex(const char* str)
    {
        std::string path = std::string(str);
        auto it          = find_if(fItems.begin(), fItems.end(), [=](const Item& it) {
            return (it.fLabel == path) || (it.fShortname == path) || (it.fPath == path);
        });
        return (it != fItems.end()) ? int(it - fItems.begin()) : -1;
    }

    /**
     * Return the param label.
     *
     * @param p - the UI parameter index
     *
     * @return the param label
     */
    const char* getParamLabel(int p) { return fItems[uint(p)].fLabel.c_str(); }

    /**
     * Return the param shortname.
     *
     * @param p - the UI parameter index
     *
     * @return the param shortname
     */
    const char* getParamShortname(int p) { return fItems[uint(p)].fShortname.c_str(); }

    /**
     * Return the param path.
     *
     * @param p - the UI parameter index
     *
     * @return the param path
     */
    const char* getParamAddress(int p) { return fItems[uint(p)].fPath.c_str(); }

    /**
     * Return the param metadata.
     *
     * @param p - the UI parameter index
     *
     * @return the param metadata as a map<key, value>
     */
    std::map<const char*, const char*> getMetadata(int p)
    {
        std::map<const char*, const char*> res;
        std::map<std::string, std::string> metadata = fMetaData[uint(p)];
        for (const auto& it : metadata) {
            res[it.first.c_str()] = it.second.c_str();
        }
        return res;
    }

    /**
     * Return the param metadata value.
     *
     * @param p - the UI parameter index
     * @param key - the UI parameter index
     *
     * @return the param metadata value associate to the key
     */
    const char* getMetadata(int p, const char* key)
    {
        return (fMetaData[uint(p)].find(key) != fMetaData[uint(p)].end())
                   ? fMetaData[uint(p)][key].c_str()
                   : "";
    }

    /**
     * Return the param minimum value.
     *
     * @param p - the UI parameter index
     *
     * @return the param minimum value
     */
    FAUSTFLOAT getParamMin(int p) { return fItems[uint(p)].fMin; }

    /**
     * Return the param maximum value.
     *
     * @param p - the UI parameter index
     *
     * @return the param maximum value
     */
    FAUSTFLOAT getParamMax(int p) { return fItems[uint(p)].fMax; }

    /**
     * Return the param step value.
     *
     * @param p - the UI parameter index
     *
     * @return the param step value
     */
    FAUSTFLOAT getParamStep(int p) { return fItems[uint(p)].fStep; }

    /**
     * Return the param init value.
     *
     * @param p - the UI parameter index
     *
     * @return the param init value
     */
    FAUSTFLOAT getParamInit(int p) { return fItems[uint(p)].fInit; }

    /**
     * Return the param memory zone.
     *
     * @param p - the UI parameter index
     *
     * @return the param memory zone.
     */
    FAUSTFLOAT* getParamZone(int p) { return fItems[uint(p)].fZone; }

    /**
     * Return the param value.
     *
     * @param p - the UI parameter index
     *
     * @return the param value.
     */
    FAUSTFLOAT getParamValue(int p) { return *fItems[uint(p)].fZone; }

    /**
     * Return the param value.
     *
     * @param str - the UI parameter label/shortname/path
     *
     * @return the param value.
     */
    FAUSTFLOAT getParamValue(const char* str)
    {
        int index = getParamIndex(str);
        if (index >= 0) {
            return getParamValue(index);
        } else {
            fprintf(stderr, "getParamValue : '%s' not found\n",
                    (str == nullptr ? "NULL" : str));
            return FAUSTFLOAT(0);
        }
    }

    /**
     * Set the param value.
     *
     * @param p - the UI parameter index
     * @param v - the UI parameter value
     *
     */
    void setParamValue(int p, FAUSTFLOAT v) { *fItems[uint(p)].fZone = v; }

    /**
     * Set the param value.
     *
     * @param p - the UI parameter label/shortname/path
     * @param v - the UI parameter value
     *
     */
    void setParamValue(const char* path, FAUSTFLOAT v)
    {
        int index = getParamIndex(path);
        if (index >= 0) {
            setParamValue(index, v);
        } else {
            fprintf(stderr, "setParamValue : '%s' not found\n",
                    (path == nullptr ? "NULL" : path));
        }
    }

    double getParamRatio(int p)
    {
        return fItems[uint(p)].fConversion->faust2ui(*fItems[uint(p)].fZone);
    }
    void setParamRatio(int p, double r)
    {
        *fItems[uint(p)].fZone = FAUSTFLOAT(fItems[uint(p)].fConversion->ui2faust(r));
    }

    double value2ratio(int p, double r)
    {
        return fItems[uint(p)].fConversion->faust2ui(r);
    }
    double ratio2value(int p, double r)
    {
        return fItems[uint(p)].fConversion->ui2faust(r);
    }

    /**
     * Return the control type (kAcc, kGyr, or -1) for a given parameter.
     *
     * @param p - the UI parameter index
     *
     * @return the type
     */
    Type getParamType(int p)
    {
        if (p >= 0) {
            if (getZoneIndex(fAcc, p, 0) != -1 || getZoneIndex(fAcc, p, 1) != -1
                || getZoneIndex(fAcc, p, 2) != -1) {
                return kAcc;
            } else if (getZoneIndex(fGyr, p, 0) != -1 || getZoneIndex(fGyr, p, 1) != -1
                       || getZoneIndex(fGyr, p, 2) != -1) {
                return kGyr;
            }
        }
        return kNoType;
    }

    /**
     * Return the Item type (kButton = 0, kCheckButton, kVSlider, kHSlider, kNumEntry,
     * kHBargraph, kVBargraph) for a given parameter.
     *
     * @param p - the UI parameter index
     *
     * @return the Item type
     */
    ItemType getParamItemType(int p) { return fItems[uint(p)].fItemType; }

    /**
     * Set a new value coming from an accelerometer, propagate it to all relevant
     * FAUSTFLOAT* zones.
     *
     * @param acc - 0 for X accelerometer, 1 for Y accelerometer, 2 for Z accelerometer
     * @param value - the new value
     *
     */
    void propagateAcc(int acc, double value)
    {
        for (size_t i = 0; i < fAcc[acc].size(); i++) {
            fAcc[acc][i]->update(value);
        }
    }

    /**
     * Used to edit accelerometer curves and mapping. Set curve and related mapping for a
     * given UI parameter.
     *
     * @param p - the UI parameter index
     * @param acc - 0 for X accelerometer, 1 for Y accelerometer, 2 for Z accelerometer
     * (-1 means "no mapping")
     * @param curve - between 0 and 3 (0: up, 1: down, 2: up and down, 2: down and up)
     * @param amin - mapping 'min' point
     * @param amid - mapping 'middle' point
     * @param amax - mapping 'max' point
     *
     */
    void setAccConverter(int p, int acc, int curve, double amin, double amid, double amax)
    {
        setConverter(fAcc, p, acc, curve, amin, amid, amax);
    }

    /**
     * Used to edit gyroscope curves and mapping. Set curve and related mapping for a
     * given UI parameter.
     *
     * @param p - the UI parameter index
     * @param gyr - 0 for X gyroscope, 1 for Y gyroscope, 2 for Z gyroscope (-1 means "no
     * mapping")
     * @param curve - between 0 and 3 (0: up, 1: down, 2: up and down, 2: down and up)
     * @param amin - mapping 'min' point
     * @param amid - mapping 'middle' point
     * @param amax - mapping 'max' point
     *
     */
    void setGyrConverter(int p, int gyr, int curve, double amin, double amid, double amax)
    {
        setConverter(fGyr, p, gyr, curve, amin, amid, amax);
    }

    /**
     * Used to edit accelerometer curves and mapping. Get curve and related mapping for a
     * given UI parameter.
     *
     * @param p - the UI parameter index
     * @param acc - the acc value to be retrieved (-1 means "no mapping")
     * @param curve - the curve value to be retrieved (between 0 and 3)
     * @param amin - the amin value to be retrieved
     * @param amid - the amid value to be retrieved
     * @param amax - the amax value to be retrieved
     *
     */
    void getAccConverter(int p, int& acc, int& curve, double& amin, double& amid,
                         double& amax)
    {
        getConverter(fAcc, p, acc, curve, amin, amid, amax);
    }

    /**
     * Used to edit gyroscope curves and mapping. Get curve and related mapping for a
     * given UI parameter.
     *
     * @param p - the UI parameter index
     * @param gyr - the gyr value to be retrieved (-1 means "no mapping")
     * @param curve - the curve value to be retrieved (between 0 and 3)
     * @param amin - the amin value to be retrieved
     * @param amid - the amid value to be retrieved
     * @param amax - the amax value to be retrieved
     *
     */
    void getGyrConverter(int p, int& gyr, int& curve, double& amin, double& amid,
                         double& amax)
    {
        getConverter(fGyr, p, gyr, curve, amin, amid, amax);
    }

    /**
     * Set a new value coming from an gyroscope, propagate it to all relevant FAUSTFLOAT*
     * zones.
     *
     * @param gyr - 0 for X gyroscope, 1 for Y gyroscope, 2 for Z gyroscope
     * @param value - the new value
     *
     */
    void propagateGyr(int gyr, double value)
    {
        for (size_t i = 0; i < fGyr[gyr].size(); i++) {
            fGyr[gyr][i]->update(value);
        }
    }

    /**
     * Get the number of FAUSTFLOAT* zones controlled with the accelerometer.
     *
     * @param acc - 0 for X accelerometer, 1 for Y accelerometer, 2 for Z accelerometer
     * @return the number of zones
     *
     */
    int getAccCount(int acc) { return (acc >= 0 && acc < 3) ? int(fAcc[acc].size()) : 0; }

    /**
     * Get the number of FAUSTFLOAT* zones controlled with the gyroscope.
     *
     * @param gyr - 0 for X gyroscope, 1 for Y gyroscope, 2 for Z gyroscope
     * @param the number of zones
     *
     */
    int getGyrCount(int gyr) { return (gyr >= 0 && gyr < 3) ? int(fGyr[gyr].size()) : 0; }

    /**
     * Get the requested screen color.
     *
     * -1 means no screen color control (no screencolor metadata found)
     * otherwise return 0x00RRGGBB a ready to use color
     *
     */
    int getScreenColor()
    {
        if (fHasScreenControl) {
            int r = (fRedReader) ? fRedReader->getValue() : 0;
            int g = (fGreenReader) ? fGreenReader->getValue() : 0;
            int b = (fBlueReader) ? fBlueReader->getValue() : 0;
            return (r << 16) | (g << 8) | b;
        } else {
            return -1;
        }
    }
};

#endif
/**************************  END  APIUI.h **************************/

// NOTE: "faust -scn name" changes the last line above to
// #include <faust/name/name.h>

//----------------------------------------------------------------------------
//  FAUST Generated Code
//----------------------------------------------------------------------------

#ifndef FAUSTFLOAT
#define FAUSTFLOAT float
#endif

#include <algorithm>
#include <cmath>
#include <cstdint>

#ifndef FAUSTCLASS
#define FAUSTCLASS stereotomonodsp
#endif

#ifdef __APPLE__
#define exp10f __exp10f
#define exp10  __exp10
#endif

#if defined(_WIN32)
#define RESTRICT __restrict
#else
#define RESTRICT __restrict__
#endif

class stereotomonodsp : public dsp
{
   private:
    int fSampleRate;

   public:
    void metadata(Meta* m)
    {
        m->declare("author", "Dominick Hing");
        m->declare("compile_options",
                   "-a faust2header.cpp -lang cpp -i -inpl -cn stereotomonodsp -es 1 "
                   "-mcd 16 -single -ftz 0");
        m->declare("description", "Stereo-to-Mono Faust Plugin for JackTrip");
        m->declare("filename", "stereotomonodsp.dsp");
        m->declare("license", "MIT Style STK-4.2");
        m->declare("name", "stereo-to-mono");
        m->declare("version", "1.0");
    }

    virtual int getNumInputs() { return 2; }
    virtual int getNumOutputs() { return 1; }

    static void classInit(int /* sample_rate */) {}

    virtual void instanceConstants(int sample_rate) { fSampleRate = sample_rate; }

    virtual void instanceResetUserInterface() {}

    virtual void instanceClear() {}

    virtual void init(int sample_rate)
    {
        classInit(sample_rate);
        instanceInit(sample_rate);
    }
    virtual void instanceInit(int sample_rate)
    {
        instanceConstants(sample_rate);
        instanceResetUserInterface();
        instanceClear();
    }

    virtual stereotomonodsp* clone() { return new stereotomonodsp(); }

    virtual int getSampleRate() { return fSampleRate; }

    virtual void buildUserInterface(UI* ui_interface)
    {
        ui_interface->openVerticalBox("stereo-to-mono");
        ui_interface->closeBox();
    }

    virtual void compute(int count, FAUSTFLOAT** inputs, FAUSTFLOAT** outputs)
    {
        FAUSTFLOAT* input0  = inputs[0];
        FAUSTFLOAT* input1  = inputs[1];
        FAUSTFLOAT* output0 = outputs[0];
        for (int i0 = 0; i0 < count; i0 = i0 + 1) {
            float fTemp0 = float(input0[i0]);
            float fTemp1 = float(input1[i0]);
            output0[i0]  = FAUSTFLOAT(0.5f * (fTemp0 + fTemp1));
        }
    }
};

#endif
