/************************** BEGIN CInterface.h **************************/
/************************************************************************
 FAUST Architecture File
 Copyright (C) 2018 GRAME, Centre National de Creation Musicale
 ---------------------------------------------------------------------
 This Architecture section 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 3 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, see <http://www.gnu.org/licenses/>.
 
 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 CINTERFACE_H
#define CINTERFACE_H

#ifndef FAUSTFLOAT
#define FAUSTFLOAT float
#endif

#include <stdlib.h>

#ifdef __cplusplus
extern "C" {
#endif
    
struct Soundfile;

/*******************************************************************************
 * UI, Meta and MemoryManager structures for C code.
 ******************************************************************************/

// -- widget's layouts

typedef void (* openTabBoxFun) (void* ui_interface, const char* label);
typedef void (* openHorizontalBoxFun) (void* ui_interface, const char* label);
typedef void (* openVerticalBoxFun) (void* ui_interface, const char* label);
typedef void (* closeBoxFun) (void* ui_interface);

// -- active widgets

typedef void (* addButtonFun) (void* ui_interface, const char* label, FAUSTFLOAT* zone);
typedef void (* addCheckButtonFun) (void* ui_interface, const char* label, FAUSTFLOAT* zone);
typedef void (* addVerticalSliderFun) (void* ui_interface, const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step);
typedef void (* addHorizontalSliderFun) (void* ui_interface, const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step);
typedef void (* addNumEntryFun) (void* ui_interface, const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step);

// -- passive widgets

typedef void (* addHorizontalBargraphFun) (void* ui_interface, const char* label, FAUSTFLOAT* zone, FAUSTFLOAT min, FAUSTFLOAT max);
typedef void (* addVerticalBargraphFun) (void* ui_interface, const char* label, FAUSTFLOAT* zone, FAUSTFLOAT min, FAUSTFLOAT max);

// -- soundfiles
    
typedef void (* addSoundfileFun) (void* ui_interface, const char* label, const char* url, struct Soundfile** sf_zone);

typedef void (* declareFun) (void* ui_interface, FAUSTFLOAT* zone, const char* key, const char* value);

typedef struct {

    void* uiInterface;

    openTabBoxFun openTabBox;
    openHorizontalBoxFun openHorizontalBox;
    openVerticalBoxFun openVerticalBox;
    closeBoxFun closeBox;
    addButtonFun addButton;
    addCheckButtonFun addCheckButton;
    addVerticalSliderFun addVerticalSlider;
    addHorizontalSliderFun addHorizontalSlider;
    addNumEntryFun addNumEntry;
    addHorizontalBargraphFun addHorizontalBargraph;
    addVerticalBargraphFun addVerticalBargraph;
    addSoundfileFun addSoundfile;
    declareFun declare;

} UIGlue;

typedef void (* metaDeclareFun) (void* ui_interface, const char* key, const char* value);

typedef struct {

    void* metaInterface;
    
    metaDeclareFun declare;

} MetaGlue;

/***************************************
 *  Interface for the DSP object
 ***************************************/

typedef char dsp_imp;
    
typedef dsp_imp* (* newDspFun) ();
typedef void (* destroyDspFun) (dsp_imp* dsp);
typedef int (* getNumInputsFun) (dsp_imp* dsp);
typedef int (* getNumOutputsFun) (dsp_imp* dsp);
typedef void (* buildUserInterfaceFun) (dsp_imp* dsp, UIGlue* ui);
typedef int (* getSampleRateFun) (dsp_imp* dsp);
typedef void (* initFun) (dsp_imp* dsp, int sample_rate);
typedef void (* classInitFun) (int sample_rate);
typedef void (* instanceInitFun) (dsp_imp* dsp, int sample_rate);
typedef void (* instanceConstantsFun) (dsp_imp* dsp, int sample_rate);
typedef void (* instanceResetUserInterfaceFun) (dsp_imp* dsp);
typedef void (* instanceClearFun) (dsp_imp* dsp);
typedef void (* computeFun) (dsp_imp* dsp, int len, FAUSTFLOAT** inputs, FAUSTFLOAT** outputs);
typedef void (* metadataFun) (MetaGlue* meta);
    
/***************************************
 * DSP memory manager functions
 ***************************************/

typedef void* (* allocateFun) (void* manager_interface, size_t size);
typedef void (* destroyFun) (void* manager_interface, void* ptr);

typedef struct {
    
    void* managerInterface;
    
    allocateFun allocate;
    destroyFun destroy;
    
} MemoryManagerGlue;

#ifdef __cplusplus
}
#endif

#endif
/**************************  END  CInterface.h **************************/