j.midi.out.cpp

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/** @file
 * 
 * @ingroup implementationMaxExternalsGraph
 *
 * @brief j.midi.out# - Jamoma Graph external object for Max
 *
 * @details
 *
 * @authors Tim Place, Trond Lossius
 *
 * @copyright Copyright © 2011 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 MidiOut {
    t_object                    obj;
    TTGraphObjectBasePtr    graphObject;
    TTPtr                   graphOutlets[16];   // this _must_ be third (for the setup call)
    t_symbol*               attrKey;
    t_symbol*               attrValue;
};
typedef MidiOut* MidiOutPtr;


// Prototypes for methods
MidiOutPtr  MidiOutNew              (t_symbol* msg, long argc, t_atom* argv);
void        MidiOutFree             (MidiOutPtr self);
void        MidiOutAssist           (MidiOutPtr self, void* b, long msg, long arg, char* dst);
void        MidiOutGetDeviceNames   (MidiOutPtr self);
t_max_err       MidiOutSetDevice        (MidiOutPtr self, void* attr, long argc, t_atom* argv);
t_max_err       MidiOutGetDevice        (MidiOutPtr self, void* attr, long* argc, t_atom** argv);


// Globals
static t_class* sMidiOutClass;


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

int C74_EXPORT main(void)
{
    t_class* c;
    
    TTGraphInit();  
    common_symbols_init();
    
    c = class_new("j.midi.out-", (method)MidiOutNew, (method)MidiOutFree, sizeof(MidiOut), (method)0L, A_GIMME, 0);
    
    class_addmethod(c, (method)MidiOutGetDeviceNames,   "getAvailableDeviceNames",  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)MidiOutAssist,           "assist",                   A_CANT, 0); 
    class_addmethod(c, (method)object_obex_dumpout,     "dumpout",                  A_CANT, 0);  
    
    CLASS_ATTR_SYM(c,       "device",       0,      MidiOut,    obj);
    CLASS_ATTR_ACCESSORS(c, "device",       MidiOutGetDevice,       MidiOutSetDevice);
    
    class_register(_sym_box, c);
    sMidiOutClass = c;
    return 0;
}


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

MidiOutPtr MidiOutNew(t_symbol* msg, long argc, t_atom* argv)
{
    MidiOutPtr  self;
    TTValue     v;
    TTErr       err;
    
    self = MidiOutPtr(object_alloc(sMidiOutClass));
    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.out";
        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 MidiOutFree(MidiOutPtr self)
{
    TTObjectBaseRelease((TTObjectBasePtr*)&self->graphObject);
}


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

// Method for Assistance Messages
void MidiOutAssist(MidiOutPtr 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");
    }
}


void MidiOutGetDeviceNames(MidiOutPtr self)
{
    TTValue     v, none;
    TTErr       err;
    long    ac;
    t_atom*     ap;
    TTSymbol    name;
    
    err = self->graphObject->mKernel.send(TT("getAvailableDeviceNames"), none, v);
    if (!err) {
        ac = v.size();
        ap = new t_atom[ac];
        
        for (long i=0; i<ac; i++) {
            name = v[i];
            atom_setsym(ap+i, gensym((char*)name.c_str()));
        }
        object_obex_dumpout(self, gensym("getAvailableDeviceNames"), ac, ap);
        delete ap;
    }
}


t_max_err MidiOutSetDevice(MidiOutPtr self, void* attr, long argc, t_atom* argv)
{
    if (argc) {
        t_symbol* s = atom_getsym(argv);
        self->graphObject->mKernel.set(TT("device"), TT(s->s_name));
    }
    return MAX_ERR_NONE;
}


t_max_err MidiOutGetDevice(MidiOutPtr self, void* attr, long* argc, t_atom** argv)
{
    TTValue     v;
    TTSymbol    s;
    
    self->graphObject->mKernel.get(TT("device"), v);
    s = v[0];
    if (!s)
        return MAX_ERR_GENERIC;
    
    *argc = 1;
    if (!(*argv)) // otherwise use memory passed in
        *argv = (t_atom *)sysmem_newptr(sizeof(t_atom));
    atom_setsym(*argv, gensym((char*)s.c_str()));
    return MAX_ERR_NONE;
}