j.midi.filter.cpp

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/** @file
 * 
 * @ingroup implementationMaxExternalsGraph
 *
 * @brief j.midi.filter# - External object for Max to append keys to a dictionary being passed in a Jamoma Graph
 *
 * @details
 *
 * @authors Tim Place, Trond Lossius
 *
 * @copyright Copyright © 2010 by Timothy Place @n
 * This code is licensed under the terms of the "New BSD License" @n
 * http://creativecommons.org/licenses/BSD/
 */


#include "maxGraph.h"


// Data Structure for this object
struct MidiFilter {
    t_object                obj;
    TTGraphObjectBasePtr    graphObject;
    TTPtr                   graphOutlets[16];   // this _must_ be third (for the setup call)
    t_symbol*               attrType;
};
typedef MidiFilter* MidiFilterPtr;


// Prototypes for methods
MidiFilterPtr   MidiFilterNew       (t_symbol* msg, long argc, t_atom* argv);
void            MidiFilterFree      (MidiFilterPtr self);
void            MidiFilterAssist    (MidiFilterPtr self, void* b, long msg, long arg, char* dst);
t_max_err           MidiFilterSetType   (MidiFilterPtr self, void* attr, long argc, t_atom* argv);


// Globals
static t_class* sMidiFilterClass;


/************************************************************************************/
// Main() Function

int C74_EXPORT main(void)
{
    t_class* c;
    
    TTGraphInit();  
    common_symbols_init();
    
    c = class_new("j.midi.filter-", (method)MidiFilterNew, (method)MidiFilterFree, sizeof(MidiFilter), (method)0L, A_GIMME, 0);
    
    class_addmethod(c, (method)MaxGraphReset,       "graph.reset",      A_CANT, 0);
    class_addmethod(c, (method)MaxGraphSetup,       "graph.setup",      A_CANT, 0);
    class_addmethod(c, (method)MaxGraphConnect,     "graph.connect",    A_OBJ, A_LONG, 0);
    class_addmethod(c, (method)MaxGraphDrop,        "graph.drop",       A_CANT, 0);
    class_addmethod(c, (method)MaxGraphObject,      "graph.object",     A_CANT, 0);

    class_addmethod(c, (method)MidiFilterAssist,    "assist",           A_CANT, 0); 
    class_addmethod(c, (method)object_obex_dumpout, "dumpout",          A_CANT, 0);  
    
    CLASS_ATTR_SYM(c,       "type",     0,      MidiFilter, attrType);
    CLASS_ATTR_ACCESSORS(c, "type",     NULL,   MidiFilterSetType);
        
    class_register(_sym_box, c);
    sMidiFilterClass = c;
    return 0;
}


/************************************************************************************/
// Object Creation Method

MidiFilterPtr MidiFilterNew(t_symbol* msg, long argc, t_atom* argv)
{
    MidiFilterPtr   self;
    TTValue     v;
    TTErr       err;
    
    self = MidiFilterPtr(object_alloc(sMidiFilterClass));
    if (self) {
        object_obex_store((void*)self, _sym_dumpout, (t_object*)outlet_new(self, NULL));    // dumpout  
        self->graphOutlets[0] = outlet_new(self, "graph.connect");
        
        v.resize(2);
        v[0] = "midi.filter";
        v[1] = 1;
        err = TTObjectBaseInstantiate(TT("graph.object"), (TTObjectBasePtr*)&self->graphObject, v);

        if (!self->graphObject->mKernel.valid()) {
            object_error(SELF, "cannot load Jamoma object");
            return NULL;
        }
        
        attr_args_process(self, argc, argv);
    }
    return self;
}


// Memory Deallocation
void MidiFilterFree(MidiFilterPtr self)
{
    TTObjectBaseRelease((TTObjectBasePtr*)&self->graphObject);
}


/************************************************************************************/
// Methods bound to input/inlets

// Method for Assistance Messages
void MidiFilterAssist(MidiFilterPtr self, void* b, long msg, long arg, char* dst)
{
    if (msg==1)         // Inlets
        strcpy (dst, "dictionary input and control messages");      
    else if (msg==2) {  // Outlets
        if (arg == 0)
            strcpy(dst, "dictionary output");
        else
            strcpy(dst, "dumpout");
    }
}


// ATTRIBUTE SETTERS

t_max_err MidiFilterSetType(MidiFilterPtr self, void* attr, long argc, t_atom* argv)
{
    if (argc) {
        self->attrType = atom_getsym(argv);
        self->graphObject->mKernel.set(TT("type"), TT(self->attrType->s_name));
    }
    return MAX_ERR_NONE;
}