[PD-dev] i need some help with this

[J. Scott Hildebrand]

        first off i think you can forget about the first email i sent.
i've included the .c code and the pd patch. all the convolution
stuff is commented out so you can compile and it try this if you want. i
almost have a working convolver to put in there, but i first need to make
sure i can get 1 mono file go into my external, and have the two convolved
signals outputted. right now something screwy is going on and i can't get
the stereo signal. thanks for any help!

              scott




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	"640K ought to be enough for anybody." -- Bill Gates, 1981

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#include "m_pd.h"
#include "fftr4.h"
#include <stdio.h>


/* this part declares the 3-dimensional array of hrtf data in memory */

static float bhrir_l[25][50][256];
static float bhrir_r[25][50][256];
static int apple=0, times=0;


static void readfile(void)
{
t_int az, el, i;
	
FILE *fid;
fid = fopen("hrir.bin", "r");               
for(az=0; az<=24; az++)
{
   for(el=0; el<=49; el++)  /*takes from hrir.bin all hrtfs and arrays them*/
   {                                          
	   fread(bhrir_l[az][el], sizeof(float), 200, fid);
           	for(i=200; i<=255; i++){bhrir_l[az][el][i]=0;}  /*adds 56 zeroes*/
	   fread(bhrir_r[az][el], sizeof(float), 200, fid);
           	for(i=200; i<=255; i++){bhrir_r[az][el][i]=0;}

   }
}

}

static float aleftout[256];
static float arightout[256];




static t_class *newconv_tilde_class;

typedef struct _newconv_tilde {
  t_object  x_obj;
  t_sample f_newconv;
  t_sample f;
  t_float secondfloat;
  t_float firstfloat;
} t_newconv_tilde;

static t_int *newconv_tilde_perform(t_int *w)
{
  t_newconv_tilde *x = (t_newconv_tilde *)(w[1]);
  t_float  *in1 =    (t_float *)(w[2]);
  t_float  *in2 =    (t_float *)(w[3]);
  t_float  *out1 =    (t_float *)(w[4]);
  t_float  *out2 =    (t_float *)(w[5]);

  int         n =           (int)(w[6]);

  int         i;
  t_int         azi=0;
  t_int         ele=0;
  t_int		read;
  t_int		readpos;

  apple = 0;
   while (n--)    
   {
     aleftout[apple] = in1[n];
     arightout[apple] = in2[n];
     apple++;
   }//endwhile

    
   if(apple == 256)
   {
/*     	   azi = (x->firstfloat - 1);
   	   ele = (x->secondfloat - 1);

     fftr4_256(aleftout);
     fftr4_256(bhrir_l[azi][ele]);
     fftr4_mul256(aleftout,bhrir_l[azi][ele]);
     fftr4_scale256(aleftout);
     fftr4_un256(aleftout);

     fftr4_256(arightout);
     fftr4_256(bhrir_r[azi][ele]);
     fftr4_mul256(arightout,bhrir_r[azi][ele]);
     fftr4_scale256(arightout);
     fftr4_un256(arightout);
*/
   for(readpos=255; readpos<=0; readpos--)
   {
	   *(out1++) = aleftout[readpos];
	   *(out2++) = arightout[readpos];
   }

   }//endif


  
  return (w+7);
}

static void newconv_tilde_dsp(t_newconv_tilde *x, t_signal **sp)
{
  dsp_add(newconv_tilde_perform, 6, x,
          sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec, sp[0]->s_n);
}

static void newconv_first(t_newconv_tilde *x, t_floatarg f)
{
	x->firstfloat = f;
	post("firstfloat is: %f", x->firstfloat);
}

static void newconv_bound(t_newconv_tilde *x, t_floatarg f)
{
	x->secondfloat = f;
	post("secondfloat is: %f", x->secondfloat);
}

static void *newconv_tilde_new(t_floatarg f)
{
  t_newconv_tilde *x = (t_newconv_tilde *)pd_new(newconv_tilde_class);

  x->f_newconv = f;
  
  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
  /*floatinlet_new (&x->x_obj, &x->f_newconv); */	/* accessing x->x_newconv gives the (last) value of this input (float) */
	/* just another float inlet: */
  
  inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("first"));

  inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("bound"));
  outlet_new(&x->x_obj, &s_signal);

  outlet_new(&x->x_obj, &s_signal);	/* second outlet for stereo */


  return (void *)x;
}

void newconv_tilde_setup(void) {
  newconv_tilde_class = class_new(gensym("newconv~"),
        (t_newmethod)newconv_tilde_new,
        0, sizeof(t_newconv_tilde),
        CLASS_DEFAULT, 
        A_DEFFLOAT, 0);

  class_addmethod(newconv_tilde_class, (t_method)newconv_tilde_dsp, gensym("dsp"), 0);
  class_addmethod(newconv_tilde_class, (t_method)newconv_first, gensym("first"), A_FLOAT, 0);	
  class_addmethod(newconv_tilde_class, (t_method)newconv_bound, gensym("bound"), A_FLOAT, 0);	/* calls a function newconv_bound when a float arrives */
  CLASS_MAINSIGNALIN(newconv_tilde_class, t_newconv_tilde, f);
}

-------------- next part --------------
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#X obj 286 82 inlet;
#X obj 427 89 inlet;
#X obj 100 346 outlet~;
#X obj 213 347 outlet~;
#X obj 110 299 newconv~;
#X obj 304 22 block~ 256 1;
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