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#ifdef NT
#include "stdafx.h"
#include <io.h>
#endif
#include "m_pd.h"
#include <stdlib.h>
#include <time.h>
#include "monorhythm.h"
/**
* The monorhythm object is designed to help build polyrhythms. Given
* a time interval and a pattern it produces the pattern within the time
* interval given. Thus if two where set going with the same time interval
* the two patterns (assuming they where different) would play against
* each other.
*
* this filename is spelt wrong 'cos I can't spell
*/
static t_class *monorhythm_class;
/**
* clock tick - do a bang and wait the next
* time delay in the list
*/
static void monorhythm_tick(t_monorhythm *x)
{
if ( x->t_running )
{
monorhythm_do_beat( x );
clock_delay(x->x_clock, x->x_beattime );
}
}
static void monorhythm_do_beat( t_monorhythm* x )
{
float beat;
if ( x->x_idx == x->x_size )
{
x->x_idx = 0;
}
if ( x->x_idx == 0)
{
outlet_bang( x->x_sync );
}
beat = x->x_pattern[ x->x_idx++ ];
if ( beat > 1 )
{
if ( x->t_exclusive == 0 )
{
outlet_bang( x->x_bang );
}
outlet_bang( x->x_accent );
}
else if ( beat == 1 )
{
outlet_bang( x->x_bang );
}
}
/**
* a bang causes a reset to the start of the bar - used to
* synchronize multiple monorhythm's. If the rhythm is not
* running it is started
*/
static void monorhythm_bang(t_monorhythm *x)
{
if ( x->x_beattime > 0 )
{
monorhythm_restart( x );
}
}
/**
* reset the rhythm to start at the beginning
*/
static void monorhythm_restart(t_monorhythm *x)
{
if ( x->x_beattime > 0 )
{
x->t_running = 1;
x->x_idx = 0;
monorhythm_do_beat( x );
clock_delay(x->x_clock, x->x_beattime );
}
}
/**
* a stop message turns us off
*/
static void monorhythm_stop(t_monorhythm *x)
{
x->t_running = 0;
}
/**
* set exclusive mode
*/
static void monorhythm_set_exclusive(t_monorhythm *x)
{
x->t_exclusive = 1;
}
/**
* set nonexclusive mode
*/
static void monorhythm_set_nonexclusive(t_monorhythm *x)
{
x->t_exclusive = 0;
}
/**
* free our clock and our timer array
*/
static void monorhythm_free(t_monorhythm *x)
{
clock_free(x->x_clock);
free( x->x_pattern );
}
/*
* make a new monorhythm - we can provide a list of times
* so read these in too
*/
static void *monorhythm_new(t_symbol *s, int argc, t_atom *argv)
{
float f;
t_monorhythm *x = (t_monorhythm *)pd_new(monorhythm_class);
x->x_pattern = NULL;
// parse any settings
if ( argc > 0 )
{
f = atom_getfloat( &argv[0] );
monorhythm_set_time( x , f );
monorhythm_pattern_seq( x, s , argc - 1 , argv + 1 );
}
x->t_running=0;
x->t_exclusive = 0;
// make us some ins and outs
x->x_clock = clock_new(x, (t_method)monorhythm_tick);
x->x_bang = outlet_new(&x->x_obj, gensym("bang"));
x->x_accent = outlet_new(&x->x_obj, gensym("accent"));
x->x_sync = outlet_new(&x->x_obj, gensym("sync"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("list"), gensym("pattern"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("timeinterval"));
return (x);
}
/**
* set a time sequence and free the old array
*/
static void monorhythm_pattern_seq( t_monorhythm *x, t_symbol *s, int ac, t_atom *av )
{
int i;
if ( x->x_pattern != NULL )
{
free( x->x_pattern );
}
if ( ac > 0 )
{
x->x_pattern = (float *) malloc( ac * sizeof( float ));
for( i = 0 ; i < ac ; i++ )
{
float t = atom_getfloat( &av[i] );
x->x_pattern[i] = t;
}
x->x_size=ac;
monorhythm_calculate_beat_interval( x );
}
else
{
// if there is no pattern it doens't do anything
x->x_pattern = NULL;
x->x_size=0;
x->t_running = 0;
}
x->x_idx = 0;
}
/**
* the time interval is divided by the number of beats that are
* going to happen in order to get the beat time. If this would
* be invallid for any reason it is set to 0 and the rhythm is stopped
*/
static void monorhythm_calculate_beat_interval( t_monorhythm *x )
{
if ( ( x->x_size > 0 ) && ( x->x_time > 0 ))
{
x->x_beattime = x->x_time / x->x_size;
}
else
{
x->x_beattime = 0;
x->t_running = 0;
}
}
/**
* set the time - recalculate the beat time
*/
static void monorhythm_set_time( t_monorhythm *x, t_float f )
{
x->x_time = f;
monorhythm_calculate_beat_interval( x );
}
/**
* make a new one and setup all of our messages
*/
void monorhythm_setup(void)
{
monorhythm_class = class_new(gensym("monorhythm"), (t_newmethod)monorhythm_new,
(t_method)monorhythm_free, sizeof(t_monorhythm), 0, A_GIMME, 0);
class_addbang(monorhythm_class, monorhythm_bang);
class_addmethod(monorhythm_class, (t_method)monorhythm_stop, gensym("stop"), 0);
class_addmethod(monorhythm_class, (t_method)monorhythm_bang, gensym("start"), 0);
class_addmethod(monorhythm_class, (t_method)monorhythm_pattern_seq, gensym("pattern" ), A_GIMME, 0);
class_addmethod(monorhythm_class, (t_method)monorhythm_set_time, gensym("timeinterval" ), A_FLOAT, 0);
class_addmethod(monorhythm_class, (t_method)monorhythm_set_exclusive,gensym("exclusive"),0);
class_addmethod(monorhythm_class, (t_method)monorhythm_set_nonexclusive,gensym("nonexclusive"),0);
}
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