externals/signal/loop~ help-loop~.pd,NONE,1.1 loop~.c,NONE,1.1 test-loop~.pd,NONE,1.1 - Pd-cvs

16 Sep 2004


      Update of /cvsroot/pure-data/externals/signal/loop~
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv26382/signal/loop~
Added Files:
    help-loop~.pd loop~.c test-loop~.pd 
Log Message:
dropped in goodie bag
--- NEW FILE: test-loop~.pd ---
#N canvas 33 0 680 609 12;
#X floatatom 52 262 0 0 0 0 - - -;
#X obj 261 346 print~;
#X msg 47 373 bang;
#X msg 274 313 bang;
#X obj 52 306 loop~;
#X floatatom 102 245 0 0 0 0 - - -;
#N canvas 0 0 450 300 graph1 0;
#X array array1 44100 float 0;
#X coords 0 10 44100 0 200 150 1;
#X restore 65 17 graph;
#X msg 43 204 ; array1 resize 44100;
#X obj 25 401 tabwrite~ array1;
#X msg 208 371 bang;
#X obj 176 402 tabwrite~ array1;
#X msg 194 261 bang;
#X obj 204 347 print~;
#X msg 217 314 bang;
#N canvas 0 0 450 300 graph1 0;
#X array array2 150000 float 0;
#X coords 0 1 150000 -1 200 150 1;
#X restore 332 398 graph;
#X msg 326 274 ; array2 resize 150000;
#X obj 103 529 tabread4~ array2;
#X obj 64 481 *~;
#X obj 107 581 dac~;
#X obj 105 552 hip~ 5;
#X obj 123 482 samphold~;
#X obj 102 506 +~;
#X floatatom 106 430 0 0 0 0 - - -;
#X obj 108 453 *~ 1000;
#X obj 312 215 soundfiler;
#X msg 330 170 read ../doc/sound/bell.aiff array2;
#X msg 330 193 read ../doc/sound/vocal.aiff array2;
#X connect 0 0 4 0;
#X connect 2 0 8 0;
#X connect 3 0 1 0;
#X connect 4 0 12 0;
#X connect 4 0 17 0;
#X connect 4 0 8 0;
#X connect 4 0 20 1;
#X connect 4 1 10 0;
#X connect 4 1 1 0;
#X connect 4 1 17 1;
#X connect 5 0 4 1;
#X connect 9 0 10 0;
#X connect 11 0 4 0;
#X connect 13 0 12 0;
#X connect 16 0 19 0;
#X connect 17 0 21 0;
#X connect 19 0 18 0;
#X connect 19 0 18 1;
#X connect 20 0 21 1;
#X connect 21 0 16 0;
#X connect 22 0 23 0;
#X connect 23 0 20 0;
#X connect 25 0 24 0;
#X connect 26 0 24 0;
--- NEW FILE: help-loop~.pd ---
#N canvas 33 0 647 662 12;
#X floatatom 41 204 0 0 0 0 - - -;
#X obj 254 382 print~;
#X msg 254 347 bang;
#X obj 41 338 loop~;
#X floatatom 66 279 0 0 0 0 - - -;
#X msg 55 252 bang;
#X obj 183 382 print~;
#X msg 183 347 bang;
#N canvas 0 0 450 300 graph1 0;
#X array array2 150000 float 0;
#X coords 0 1 150000 -1 200 150 1;
#X restore 393 464 graph;
#X msg 393 622 ; array2 resize 150000;
#X obj 25 613 soundfiler;
#X obj 16 453 tabread4~ array2;
#X obj 16 407 *~;
#X obj 16 522 dac~;
#X obj 16 499 hip~ 5;
#X obj 62 411 samphold~;
#X obj 16 430 +~;
#X floatatom 96 303 0 0 0 0 - - -;
#X obj 96 326 *~ 1000;
#X msg 43 568 read ../doc/sound/bell.aiff array2;
#X msg 43 591 read ../doc/sound/vocal.aiff array2;
#X msg 47 229 set 0.5;
#X text 95 196 left signal input is transposition (1 is normal , 2
is up an octave , etc);
#X text 82 4 loop~ - phase generator for looping samplers;
#X text 116 228 set phase (0 to 1);
#X text 104 253 reset phase to 0;
#X text 104 278 right signal input is window size in samples;
#X text 134 302 here's how to handle onsets;
#X obj 16 476 *~;
#X floatatom 167 432 0 0 0 0 - - -;
#X obj 167 501 line~;
#X obj 167 455 dbtorms;
#X obj 167 478 pack 0 50;
#X text 201 431 output level 0-100;
#X text 187 326 print outputs;
#X text 33 32 loop~ takes input signals to set a window size and transposition
, and outputs a phase and a sampled window size. The window size only
changes at phase zero crossings and the phase output is adjusted so
that changing window size doesn't change the transposition.;
#X text 33 112 You can send "bang" or "set" message to force the phase
to zero--you should mute the output before doing so. This may be desirable
if you've set a large window size but then want to decrease it without
waiting for the next phase crossing.;
#X connect 0 0 3 0;
#X connect 2 0 1 0;
#X connect 3 0 6 0;
#X connect 3 0 12 0;
#X connect 3 0 15 1;
#X connect 3 1 1 0;
#X connect 3 1 12 1;
#X connect 4 0 3 1;
#X connect 5 0 3 0;
#X connect 7 0 6 0;
#X connect 11 0 28 0;
#X connect 12 0 16 0;
#X connect 14 0 13 0;
#X connect 14 0 13 1;
#X connect 15 0 16 1;
#X connect 16 0 11 0;
#X connect 17 0 18 0;
#X connect 18 0 15 0;
#X connect 19 0 10 0;
#X connect 20 0 10 0;
#X connect 21 0 3 0;
#X connect 28 0 14 0;
#X connect 29 0 31 0;
#X connect 30 0 28 1;
#X connect 31 0 32 0;
#X connect 32 0 30 0;
--- NEW FILE: loop~.c ---
/* loop~ -- loop generator for sampling */
/*  Copyright 1997-1999 Miller Puckette.
Permission is granted to use this software for any purpose provided you
keep this copyright notice intact.
THE AUTHOR AND HIS EMPLOYERS MAKE NO WARRANTY, EXPRESS OR IMPLIED,
IN CONNECTION WITH THIS SOFTWARE.
This file is downloadable from http://www.crca.ucsd.edu/~msp .
*/
#ifdef PD
#include "m_pd.h"
#endif
typedef struct _loopctl
{
    double l_phase;
    float l_invwindow;
    float l_window;
    int l_resync;
} t_loopctl;
static void loopctl_run(t_loopctl *x, float *transposein,
    	float *windowin, float *rawout, float *windowout, int n)
{
    float window, invwindow;
    double phase = x->l_phase;
    if (x->l_resync)
    {
    window = *windowin;
    if (window < 0)
    {
        if (window > -1)
        	window = -1;
    	    invwindow = -1/window;
    }
    else
    {
        if (window < 1)
        	window = 1;
    	    invwindow = 1/window;
    	}
    	x->l_resync = 0;
    }
    else
    {
    	window = x->l_window;
    	phase = x->l_phase;
    invwindow = x->l_invwindow;
    }
    while (n--)
    {
    	double phaseinc = invwindow * *transposein++;
    double newphase;
    float nwind = *windowin++;
    if (phaseinc >= 1 || phaseinc < 0)
        phaseinc = 0;
    newphase = phase + phaseinc;
    if (newphase >= 1)
    {
        window = nwind;
        if (window < 0)
        {
    	if (window > -1)
        	    window = -1;
    		invwindow = -1/window;
        }
        else
        {
    	if (window < 1)
        	    window = 1;
    		invwindow = 1/window;
    	    }
        newphase -= 1.;
    }
    phase = newphase;
    *rawout++ = (float)phase;
    *windowout++ = window;
    }
    x->l_invwindow = invwindow;
    x->l_window = window;
    x->l_phase = phase;
}
static void loopctl_init(t_loopctl *x)
{
    x->l_window = 1;
    x->l_invwindow = 1;
    x->l_phase = 0;
}
static void loopctl_set(t_loopctl *x, float val)
{
    if (val < 0 || val > 1)
    	val = 0;
    x->l_phase = val;
    x->l_resync = 1;
}
#ifdef PD
typedef struct _loop
{
    t_object x_obj;
    t_float x_f;
    t_loopctl x_loopctl;
} t_loop;
static t_class *loop_class;
static void *loop_new(void)
{
    t_loop *x = (t_loop *)pd_new(loop_class);
    loopctl_init(&x->x_loopctl);
    inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
    outlet_new(&x->x_obj, gensym("signal"));
    outlet_new(&x->x_obj, gensym("signal"));
    return (x);
}
static t_int *loop_perform(t_int *w)
{
    t_loopctl *ctl = (t_loopctl *)(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]);
    loopctl_run(ctl, in1, in2, out1, out2, n);
    return (w+7);
}
static void loop_dsp(t_loop *x, t_signal **sp)
{
    dsp_add(loop_perform, 6,
    &x->x_loopctl, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec,
        sp[0]->s_n);
}
static void loop_set(t_loop *x, t_floatarg val)
{
    loopctl_set(&x->x_loopctl, val);
}
static void loop_bang(t_loop *x)
{
    loopctl_set(&x->x_loopctl, 0);
}
void loop_tilde_setup(void)
{
    loop_class = class_new(gensym("loop~"), (t_newmethod)loop_new, 0,
    	sizeof(t_loop), 0, 0);
    class_addmethod(loop_class, (t_method)loop_dsp, gensym("dsp"), A_CANT, 0);
    CLASS_MAINSIGNALIN(loop_class, t_loop, x_f);
    class_addmethod(loop_class, (t_method)loop_set, gensym("set"),
    	A_DEFFLOAT, 0);
    class_addbang(loop_class, loop_bang);
}
#endif /* PD */