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/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
#ifdef _MSC_VER
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
#include "m_pd.h"
#include "iemlib.h"
#include <math.h>
#include <stdio.h>
#include <string.h>
/* -------------------------- sigiem_delay~ ------------------------------ */
static t_class *sigiem_delay_class;
#define IEMDELAY_DEF_VEC_SIZE 64
typedef struct _sigiem_delay
{
t_object x_obj;
int x_mallocsize;
t_float x_max_delay_ms;
t_float x_current_delay_ms;
t_float *x_begmem1;
t_float *x_begmem2;
int x_writeindex;
int x_blocksize;
int x_delay_samples;
t_float x_sr;
t_float x_msi;
} t_sigiem_delay;
static void sigiem_delay_cur_del(t_sigiem_delay *x, t_floatarg f)
{
if(f < 0.0f)
f = 0.0f;
else if(f > x->x_max_delay_ms)
f = x->x_max_delay_ms;
x->x_current_delay_ms = f;
x->x_delay_samples = (int)(0.001f*x->x_sr * f + 0.5f);
}
static t_int *sigiem_delay_perform(t_int *w)
{
t_float *in = (t_float *)(w[1]);
t_float *out = (t_float *)(w[2]);
t_sigiem_delay *x = (t_sigiem_delay *)(w[3]);
int n=(int)(w[4]);
int writeindex = x->x_writeindex;
t_float *vec1, *vec2, *vec3;
vec1 = x->x_begmem1 + writeindex;
vec2 = x->x_begmem2 + writeindex;
vec3 = x->x_begmem2 + writeindex - x->x_delay_samples;
writeindex += n;
while(n--)
{
*vec1++ = *vec2++ = *in++;
*out++ = *vec3++;
}
if(writeindex >= x->x_mallocsize)
{
writeindex -= x->x_mallocsize;
}
x->x_writeindex = writeindex;
return(w+5);
}
static t_int *sigiem_delay_perf8(t_int *w)
{
t_float *in = (t_float *)(w[1]);
t_float *out = (t_float *)(w[2]);
t_sigiem_delay *x = (t_sigiem_delay *)(w[3]);
int i, n=(int)(w[4]);
int writeindex = x->x_writeindex;
t_float *vec1, *vec2;
vec1 = x->x_begmem1 + writeindex;
vec2 = x->x_begmem2 + writeindex;
for(i=0; i<n; i+=8)
{
*vec1++ = *vec2++ = *in++;
*vec1++ = *vec2++ = *in++;
*vec1++ = *vec2++ = *in++;
*vec1++ = *vec2++ = *in++;
*vec1++ = *vec2++ = *in++;
*vec1++ = *vec2++ = *in++;
*vec1++ = *vec2++ = *in++;
*vec1++ = *vec2++ = *in++;
}
vec2 = x->x_begmem2 + writeindex - x->x_delay_samples;
for(i=0; i<n; i+=8)
{
*out++ = *vec2++;
*out++ = *vec2++;
*out++ = *vec2++;
*out++ = *vec2++;
*out++ = *vec2++;
*out++ = *vec2++;
*out++ = *vec2++;
*out++ = *vec2++;
}
writeindex += n;
if(writeindex >= x->x_mallocsize)
{
writeindex -= x->x_mallocsize;
}
x->x_writeindex = writeindex;
return(w+5);
}
static void sigiem_delay_dsp(t_sigiem_delay *x, t_signal **sp)
{
int blocksize = sp[0]->s_n, i;
if(!x->x_blocksize)/*first time*/
{
int nsamps = x->x_max_delay_ms * (t_float)sp[0]->s_sr * 0.001f;
if(nsamps < 1)
nsamps = 1;
nsamps += ((- nsamps) & (blocksize - 1));
nsamps += blocksize;
x->x_mallocsize = nsamps;
x->x_begmem1 = (t_float *)getbytes(2 * x->x_mallocsize * sizeof(t_float));
x->x_begmem2 = x->x_begmem1 + x->x_mallocsize;
post("beginn = %x", (unsigned long)x->x_begmem1);
x->x_writeindex = blocksize;
x->x_sr = (t_float)sp[0]->s_sr;
x->x_blocksize = blocksize;
x->x_delay_samples = (int)(0.001f*x->x_sr * x->x_current_delay_ms + 0.5f);
}
else if((x->x_blocksize != blocksize) || ((t_float)sp[0]->s_sr != x->x_sr))
{
int nsamps = x->x_max_delay_ms * (t_float)sp[0]->s_sr * 0.001f;
if(nsamps < 1)
nsamps = 1;
nsamps += ((- nsamps) & (blocksize - 1));
nsamps += blocksize;
x->x_begmem1 = (t_float *)resizebytes(x->x_begmem1, 2*x->x_mallocsize*sizeof(t_float), 2*nsamps*sizeof(t_float));
x->x_mallocsize = nsamps;
x->x_begmem2 = x->x_begmem1 + x->x_mallocsize;
post("beginn = %x", (unsigned long)x->x_begmem1);
if(x->x_writeindex >= nsamps)
x->x_writeindex -= nsamps;
x->x_sr = (t_float)sp[0]->s_sr;
x->x_blocksize = blocksize;
x->x_delay_samples = (int)(0.001f*x->x_sr * x->x_current_delay_ms + 0.5f);
}
if(blocksize&7)
dsp_add(sigiem_delay_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, blocksize);
else
dsp_add(sigiem_delay_perf8, 4, sp[0]->s_vec, sp[1]->s_vec, x, blocksize);
}
static void *sigiem_delay_new(t_floatarg max_delay_ms, t_floatarg current_delay_ms)
{
t_sigiem_delay *x = (t_sigiem_delay *)pd_new(sigiem_delay_class);
int nsamps;
if(max_delay_ms < 2.0f)
max_delay_ms = 2.0f;
x->x_max_delay_ms = max_delay_ms;
if(current_delay_ms < 0.0f)
current_delay_ms = 0.0f;
else if(current_delay_ms > max_delay_ms)
current_delay_ms = max_delay_ms;
x->x_current_delay_ms = current_delay_ms;
nsamps = max_delay_ms * sys_getsr() * 0.001f;
if(nsamps < 1)
nsamps = 1;
nsamps += ((- nsamps) & (IEMDELAY_DEF_VEC_SIZE - 1));
nsamps += IEMDELAY_DEF_VEC_SIZE;
x->x_mallocsize = nsamps;
x->x_begmem1 = (t_float *)getbytes(2 * x->x_mallocsize * sizeof(t_float));
x->x_begmem2 = x->x_begmem1 + x->x_mallocsize;
x->x_writeindex = IEMDELAY_DEF_VEC_SIZE;
x->x_blocksize = 0;
x->x_sr = 0.0f;
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
outlet_new(&x->x_obj, &s_signal);
x->x_msi = 0.0f;
return (x);
}
static void sigiem_delay_free(t_sigiem_delay *x)
{
freebytes(x->x_begmem1, 2 * x->x_mallocsize * sizeof(t_float));
}
void sigiem_delay_setup(void)
{
sigiem_delay_class = class_new(gensym("iem_delay~"), (t_newmethod)sigiem_delay_new, (t_method)sigiem_delay_free,
sizeof(t_sigiem_delay), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(sigiem_delay_class, t_sigiem_delay, x_msi);
class_addmethod(sigiem_delay_class, (t_method)sigiem_delay_dsp, gensym("dsp"), 0);
class_addmethod(sigiem_delay_class, (t_method)sigiem_delay_cur_del, gensym("ft1"), A_FLOAT, 0);
}
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