/************************** BEGIN llvm-machine-dsp.h ***********************
FAUST Architecture File
Copyright (C) 2003-2022 GRAME, Centre National de Creation Musicale
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This program is free software; you can redistribute it and/or modify
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This program is distributed in the hope that it will be useful,
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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EXCEPTION : As a special exception, you may create a larger work
that contains this FAUST architecture section and distribute
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***************************************************************************/

#ifndef LLVM_MACHINE_DSP_H
#define LLVM_MACHINE_DSP_H

#include <vector>
#include <string>

#include "faust/dsp/dsp.h"
#include "faust/gui/meta.h"
#include "faust/export.h"

/*!
 \addtogroup llvmcpp C++ interface for reading LLVM machine code.
 @{
 */
 
/**
 * Get the library version.
 * 
 * @return the library version as a static string.
 */
extern "C" LIBFAUST_API const char* getCLibFaustVersion();

/**
 * DSP instance class with methods.
 */
class LIBFAUST_API llvm_dsp : public dsp {
    
    private:
    
        // llvm_dsp objects are allocated using llvm_dsp_factory::createDSPInstance();
        llvm_dsp() {}
    
    public:
        
        int getNumInputs();
       
        int getNumOutputs();
        
        void buildUserInterface(UI* ui_interface);
       
        int getSampleRate();
        
        void init(int sample_rate);
       
        void instanceInit(int sample_rate);
    
        void instanceConstants(int sample_rate);
    
        void instanceResetUserInterface();
        
        void instanceClear();
        
        llvm_dsp* clone();
        
        void metadata(Meta* m);
        
        void compute(int count, FAUSTFLOAT** inputs, FAUSTFLOAT** outputs);
    
};

/**
 * DSP factory class.
 */

class LIBFAUST_API llvm_dsp_factory : public dsp_factory {

     public:
    
        virtual ~llvm_dsp_factory();
        
        /**
         *  Return factory name:
         *  either the name declared in DSP with [declare name "foo"] syntax
         *  or 'filename' (if createDSPFactoryFromFile is used)
         *  or 'name_app' (if createDSPFactoryFromString is used)
        */
        std::string getName();
    
        /* Return factory LLVM target */
        std::string getTarget();
        
        /* Return factory SHA key */
        std::string getSHAKey();
        
        /* Return factory expanded DSP code */
        std::string getDSPCode();
        
        /* Return factory compile options */
        std::string getCompileOptions();
        
        /* Get the Faust DSP factory list of library dependancies */
        std::vector<std::string> getLibraryList();
        
        /* Get the list of all used includes */
        std::vector<std::string> getIncludePathnames();
        
        /* Create a new DSP instance, to be deleted with C++ 'delete' */
        llvm_dsp* createDSPInstance();
        
        /* Set a custom memory manager to be used when creating instances */
        void setMemoryManager(dsp_memory_manager* manager);
        
        /* Return the currently set custom memory manager */
        dsp_memory_manager* getMemoryManager();
    
};

/**
 * Get the target (triple + CPU) of the machine.
 *
 * @return the target as a string.
 */
LIBFAUST_API std::string getDSPMachineTarget();

/**
 * Get the Faust DSP factory associated with a given SHA key (created from the 'expanded' DSP source), 
 * if already allocated in the factories cache and increment it's reference counter. You will have to explicitly
 * use deleteDSPFactory to properly decrement reference counter when the factory is no more needed.
 *
 * @param sha_key - the SHA key for an already created factory, kept in the factory cache
 *
 * @return a DSP factory if one is associated with the SHA key, otherwise a null pointer.
 */
LIBFAUST_API llvm_dsp_factory* getDSPFactoryFromSHAKey(const std::string& sha_key);

/**
/**
 * Delete a Faust DSP factory, that is decrements it's reference counter, possibly really deleting the internal pointer. 
 * Possibly also delete DSP pointers associated with this factory, if they were not explicitly deleted with C++ delete.
 * Beware: all kept factories and DSP pointers (in local variables...) thus become invalid.
 * 
 * @param factory - the DSP factory
 *
 * @return true if the factory internal pointer was really deleted, and false if only 'decremented'.
 */                                 
LIBFAUST_API bool deleteDSPFactory(llvm_dsp_factory* factory);

/**
 * Delete all Faust DSP factories kept in the library cache. Beware: all kept factory and DSP pointers (in local variables...) thus become invalid.
 * 
 */                                 
LIBFAUST_API void deleteAllDSPFactories();

/**
 * Return Faust DSP factories of the library cache as a vector of their SHA keys.
 * 
 * @return the Faust DSP factories.
 */                                 
LIBFAUST_API std::vector<std::string> getAllDSPFactories();

/**
 * Create a Faust DSP factory from a base64 encoded machine code string. Note that the library keeps an internal cache of all
 * allocated factories so that the compilation of the same DSP code (that is the same machine code string) will return
 * the same (reference counted) factory pointer. You will have to explicitly use deleteDSPFactory to properly
 * decrement reference counter when the factory is no more needed.
 *
 * @param machine_code - the machine code string
 * @param target - the LLVM machine target: like 'i386-apple-macosx10.6.0:opteron',
 *                 using an empty string takes the current machine settings,
 *                 and i386-apple-macosx10.6.0:generic kind of syntax for a generic processor
 * @param error_msg - the error string to be filled
 *
 * @return the DSP factory on success, otherwise a null pointer.
 */
LIBFAUST_API llvm_dsp_factory* readDSPFactoryFromMachine(const std::string& machine_code, const std::string& target, std::string& error_msg);

/**
 * Create a Faust DSP factory from a machine code file. Note that the library keeps an internal cache of all
 * allocated factories so that the compilation of the same DSP code (that is the same machine code file) will return
 * the same (reference counted) factory pointer. You will have to explicitly use deleteDSPFactory to properly
 * decrement reference counter when the factory is no more needed.
 *
 * @param machine_code_path - the machine code file pathname
 * @param target - the LLVM machine target: like 'i386-apple-macosx10.6.0:opteron',
 *                 using an empty string takes the current machine settings,
 *                 and i386-apple-macosx10.6.0:generic kind of syntax for a generic processor
 * @param error_msg - the error string to be filled
 *
 * @return the DSP factory on success, otherwise a null pointer.
 */
LIBFAUST_API llvm_dsp_factory* readDSPFactoryFromMachineFile(const std::string& machine_code_path, const std::string& target, std::string& error_msg);

/*!
 @}
 */

#endif
/************************** END llvm-machine-dsp.h **************************/
