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|
#include "m_pd.h"
#include "ext13.h"
#include <sys/types.h>
#include <string.h>
#include <math.h>
#ifndef _WIN32
#include <netinet/in.h>
#include <netdb.h>
#include <sys/errno.h>
#include <sys/socket.h>
#else
#include <stdlib.h>
#endif
/* ------------------------ scramble_tilde~ ----------------------------- */
static t_class *scramble_tilde_class;
typedef struct _scramble_grain
{
t_float* L;
t_float* R;
int size;
t_float maximum;
struct _scramble_grain *next;
}t_scramble_grain;
typedef struct _scramble_tilde
{
t_object x_obj;
int x_n;
t_int x_channels;
t_float play, analize;
t_float dir, current_dir, pitch, actual_pitch, grain_r, autopitch;
t_float valsum, valavg;
int valsumcount, valsummax;
int autofollow, playmode, semitones;
t_scramble_grain *firstgrain;
t_scramble_grain *workgrain;
t_scramble_grain *ring;
int grains, newgrains, w_grain, r_grain, n_grain, gotagrain, flush;
int r_d, w_d, dist, mindist, lowptr, hiptr, lastlowptr;
t_float lowval, hival, prevval, lowborder, normalize;
int nsamples;
t_outlet *trigger1;
t_outlet *trigger2;
} t_scramble_tilde;
/* grain functions*/
static t_scramble_grain* scramble_tilde_newgrain(){
t_scramble_grain* thegrain;
thegrain = getbytes( sizeof(t_scramble_grain));
thegrain->L = NULL;
thegrain->R = NULL;
thegrain->size = 0;
thegrain->next = NULL;
return (thegrain);
}
static t_scramble_grain* scramble_tilde_getgrain(t_scramble_grain* firstgrain, int n){
t_scramble_grain* thegrain = firstgrain;
while (n--){
if (thegrain->next){
thegrain = thegrain->next;
}else
return (NULL);
}
return (thegrain);
}
static int scramble_tilde_getsomegrain(t_scramble_grain* firstgrain,int g){
t_scramble_grain* thegrain ;
int r;
do{
r = rand() % g;
thegrain = scramble_tilde_getgrain(firstgrain, r);
}while (thegrain->size == 0);
return (r);
}
static void scramble_tilde_grainbuf(t_scramble_grain* grain, int c, int n){
if (!grain->size)
grain->L = getbytes(n * sizeof(t_float));
else
grain->L = resizebytes(grain->L, grain->size * sizeof(t_float), n * sizeof(t_float));
if (c == 2){
if (!grain->size)
grain->R = getbytes(n * sizeof(t_float));
else
grain->R = resizebytes(grain->R, grain->size * sizeof(t_float), n * sizeof(t_float));
}
grain->size = n;
}
static void scramble_tilde_freegrain(t_scramble_grain* grain, int c){
if (grain->size){
freebytes(grain->L, grain->size * sizeof(t_float));
if (c == 2) freebytes(grain->R, grain->size * sizeof(t_float));
grain->size = 0;
grain->next = NULL;
}
}
t_int *scramble_tilde_perform(t_int *w)
{
t_scramble_tilde* x = (t_scramble_tilde*)(w[1]);
int i;
int erg=0;
int n;
t_float val, valL, valR, killval;
#ifndef _WIN32
t_float* out[x->x_channels];
t_float* in[x->x_channels];
#else
t_float** out = (t_float**)malloc(x->x_channels*sizeof(t_float*));
t_float** in = (t_float**)malloc(x->x_channels*sizeof(t_float*));
#endif
float n_factor, frac, a, b, c, d, cminusb;
int index;
float *fp;
t_atom at[2];
/* anything changed?*/
if (x->flush){
int i = x->grains;
x->flush = 0;
x->gotagrain = 0;
while (i--)
scramble_tilde_grainbuf(scramble_tilde_getgrain(x->firstgrain,i),x->x_channels,0);
}
if (x->newgrains){
int tmp = x->grains;
if (x->newgrains > x->grains){
x->workgrain = scramble_tilde_getgrain(x->firstgrain,x->grains - 1); /*-1 ???*/
tmp = x->newgrains;
x->newgrains -= x->grains;
x->grains = tmp;
while (x->newgrains--){
x->workgrain->next = scramble_tilde_newgrain();
x->workgrain = x->workgrain->next;
}
// post ("now %d grains",x->grains);
}else{
if (x->newgrains < x->grains){
t_scramble_grain* tmpgrain;
x->grains = x->newgrains;
x->workgrain = scramble_tilde_getgrain(x->firstgrain,x->grains - 1);
/* delete old grains */
while (x->workgrain->next){
tmpgrain = x->workgrain->next;
scramble_tilde_freegrain(x->workgrain,x->x_channels);
x->workgrain = tmpgrain;
}
/* reset readpointer if needed*/
if (x->r_grain >= x->grains){
x->r_grain = 0;
x->grain_r = -1;
}
// post ("now %d grains",x->grains);
}
}
x->newgrains=0;
}
if ((x->ring->size > x->x_n) || (x->ring->size < x->x_n) ){
// post ("scramble~: new size for ringbuffer:%d samples, %d channels, oldsize:%d",x->x_n,x->x_channels,x->ring->size);
scramble_tilde_grainbuf(x->ring, x->x_channels ,x->x_n);
x->x_n = x->ring->size;
x->dist = 0;
x->lowptr = x->r_d;
x->lastlowptr = -1;
x->lowval = x->lowborder;
}
for (i = 0; i < x->x_channels ;i++)
in[i] = (t_float *)(w[2 + i]);
for (i = 0;i < x->x_channels ;i++)
out[i] = (t_float *)(w[2 + x->x_channels + i]);
n = (int)(w[2 + x->x_channels * 2]);/*number of samples*/
// post ("n:%d",n);
while (n--){
/*read from input*/
if (++x->r_d > x->x_n){
x->r_d = 0;
}
valL = *(t_float*)(x->ring->L + x->r_d) = *in[0]++;
if (valL < 0) valL *= -1;
if (x->x_channels == 2){
valR = *(t_float*)(x->ring->R + x->r_d) = *in[1]++;
if (valR < 0) valR *= -1;
val = valL + valR / 2.0;
if (valL > x->hival){
x->hiptr = x->r_d;
x->hival = valL;
}
if (valR > x->hival){
x->hiptr = x->r_d;
x->hival = valR;
}
}else {
val = valL;
if (valL > x->hival){
x->hiptr = x->r_d;
x->hival = valL;
}
}
// if (val < 0) val *= -1;
x->valsum += val;
// if (x->valsumcount++ > x->mindist * 10){
if (x->valsumcount++ && (x->r_d == 0)){
x->valavg = x->valsum / x->valsumcount;
x->valsumcount = 0;
x->valsum = 0;
if (x->autofollow && ( x->valavg > 0.003)) {
x->lowborder = x->valavg;
// post ("lowborder = %f",x->lowborder);
}
}
if ((val < x->lowborder) && (x->prevval > x->lowborder)){
/* a new low-period */
x->dist = -1;
x->lowptr = x->r_d;
x->lowval = val;
// post ("low");
}
if ((x->r_d + 1) == x->lastlowptr){
/* one round without a point to cut */
x->lastlowptr = -1;
x->lowval = x->lowborder;
x->hival = 0;
// post ("lastlowptr: reset");
}
if (val < x->lowborder){x->dist++;}
if (val <= x->lowval) {
x->lowptr = x->r_d;
x->lowval = val;
/*found a point to cut*/
}
if ((val > x->lowborder) && (x->prevval < x->lowborder) && ( x->dist < x->mindist)){
/*too short low-period*/
x->dist = 0;
x->lowptr = x->r_d;
x->lowval = x->lowborder;
// post ("low too short");
}
if ((val > x->lowborder) && (x->prevval < x->lowborder) && ( x->dist > x->mindist)){
/*found a low-period to cut */
if ((x->lastlowptr != -1) ){
int grainlen = 0;
int i = 0;
int wp = 1; /*first and last sample of grain should be 0.0*/
x->gotagrain = 1;
/* how long is the new grain */
if (x->lastlowptr > x->lowptr){
grainlen = x->x_n - x->lastlowptr + x->lowptr;
}else{
grainlen = x->lowptr - x->lastlowptr;
}
if (x->analize){
/*find and prepare the grain*/
if (++x->w_grain >= x->grains ) x->w_grain = 0;
x->workgrain = scramble_tilde_getgrain (x->firstgrain, x->w_grain);
scramble_tilde_grainbuf(x->workgrain, x->x_channels, grainlen + 2);
*(t_float*)(x->workgrain->L) = 0.0;
*(t_float*)(x->workgrain->L + x->workgrain->size -1) = 0.0;
if (x->x_channels == 2){
*(t_float*)(x->workgrain->R) = 0.0;
*(t_float*)(x->workgrain->R + x->workgrain->size -1) = 0.0;
}
x->workgrain->maximum = x->hival;
/*notify the world*/
SETFLOAT(at, grainlen);
SETFLOAT(at+1, x->w_grain + 1);
outlet_list(x->trigger1, 0, 2, at);
/*copy to the grain*/
i = x->lastlowptr;
while (grainlen--){
if (++i >= x->x_n) i = 0;
*(t_float*)(x->workgrain->L + wp ) = *(t_float*)(x->ring->L + i);
if (x->x_channels == 2)
*(t_float*)(x->workgrain->R + wp ) = *(t_float*)(x->ring->R + i);
wp++;
}
}/*end if analize*/
// post ("copied: w_grain: %d",x->w_grain);
}/* end lastlowptr != -1*/
x->dist = 0;
x->hival = 0;
x->lastlowptr = x->lowptr;
}/*end found a low-period to cut */
x->prevval = val;
}/*end while n-- (read from input)*/
/*--------------------playback--------------*/
n = (int)(w[2 + x->x_channels * 2]);/*number of samples*/
x->workgrain = scramble_tilde_getgrain (x->firstgrain, x->r_grain);
if (x->normalize && x->workgrain) n_factor = x->normalize / x->workgrain->maximum;
else n_factor = 1;
while (n--){
int wgs;
if (x->workgrain) wgs = x->workgrain->size - 2;
else wgs = 0;
if (( (x->grain_r >= wgs) || (x->grain_r < 1) || (x->workgrain == NULL) ) && x->play && x->gotagrain){
if (x->playmode < 2){
x->r_grain = scramble_tilde_getsomegrain(x->firstgrain, x->grains);
x->workgrain = scramble_tilde_getgrain (x->firstgrain, x->r_grain);
}else{
if (x->n_grain == -1){
x->play = 0;
x->r_grain = 0;
x->workgrain = NULL;
}else{
x->r_grain = x->n_grain;
x->workgrain = scramble_tilde_getgrain (x->firstgrain, x->r_grain);
x->n_grain = -1;
if ((x->r_grain == x->w_grain) || (x->workgrain == NULL)){
x->play = 0;
x->r_grain = 0;
x->workgrain = NULL;
} else if (!x->workgrain->size){
x->play = 0;
x->r_grain = 0;
x->workgrain = NULL;
}
}
}/*end if playmode < 2*/
if (x->workgrain){
if (((rand() % 200) / 100.0 - 1.0 ) < x->dir){
x->current_dir = 1;
x->grain_r = 1;
}
else{
x->current_dir = -1;
x->grain_r = x->workgrain->size -3;
}
if ( ( (x->autopitch >= 1.) && (x->semitones) ) || ( (x->autopitch) && (! x->semitones) ) ){
if (x->semitones){
int ap = (int)x->autopitch;
int rauf = 0;
int count ;
if (rand() % 2 == 1){ rauf = 1;}
/* post ("rauf:%d",rauf); */
x->actual_pitch = x->pitch;
for (count = (rand() % ap); count >= 0; count--){
/*1.05946 = 12te wurzel aus 2 */
if (rauf){
x->actual_pitch = x->actual_pitch * 1.05946;
}else{
x->actual_pitch = x->actual_pitch / 1.05946;
}
}
}else{
if (((rand() % 200) / 100.0 - 1.0 ) > 0){
x->actual_pitch = x->pitch + x->pitch * ((rand() % 100 ) / 100.0 * x->autopitch);
}else{
x->actual_pitch = x->pitch - x->pitch / ((rand() % 100 ) / 100.0 * x->autopitch);
}
}/*end if semitones*/
} else {
x->actual_pitch = x->pitch;
}/* end if autopitch*/
/* post ("x->actual_pitch:%f, x->autopitch:%f",x->actual_pitch,x->autopitch); */
if (x->normalize) n_factor = x->normalize / x->workgrain->maximum;
else n_factor = 1;
SETFLOAT(at, (x->workgrain->size - 2) / x->actual_pitch);
SETFLOAT(at+1, x->r_grain + 1);
outlet_list(x->trigger2, 0, 2, at);
}/*end if workgrain !=NULL */
}/* end finding a new grain*/
if (x->play && x->gotagrain){
/*write graincontent to output*/
/* 4 point interpolation taken from ../src/d_array.c tabread4~ */
index = x->grain_r;
if (index < 1)
index = 1, frac = 0;
else if (index > x->workgrain->size - 3)
index = x->workgrain->size - 3, frac = 1;
else
frac = x->grain_r - index;
fp = (t_float*)(x->workgrain->L + index);
a = fp[-1];
b = fp[0];
c = fp[1];
d = fp[2];
cminusb = c-b;
*out[0]++ = (b + frac * (
cminusb - 0.5f * (frac-1.) * (
(a - d + 3.0f * cminusb) * frac + (b - a - cminusb)
)
)) * n_factor;
if (x->x_channels == 2){
fp = (t_float*)(x->workgrain->R + index);
a = fp[-1];
b = fp[0];
c = fp[1];
d = fp[2];
cminusb = c-b;
*out[1]++ = (b + frac * (
cminusb - 0.5f * (frac-1.) * (
(a - d + 3.0f * cminusb) * frac + (b - a - cminusb)
)
)) * n_factor;
}
x->grain_r += x->current_dir * x->actual_pitch;
}else/* if play*/{
*out[0]++ = 0;
if (x->x_channels == 2)
*out[1]++ = 0;
}/*end if play */
}/*end while n-- */
#ifdef _WIN32
free(in);
free(out);
#endif
return (w + x->x_channels * 2 + 3);
}
static void scramble_tilde_dsp(t_scramble_tilde *x, t_signal **sp)
{
switch (x->x_channels) {
case 1:
dsp_add(scramble_tilde_perform, 4, x, sp[0]->s_vec,
sp[1]->s_vec, sp[0]->s_n);
// post ("1 channel");
break;
case 2:
dsp_add(scramble_tilde_perform, 6, x, sp[0]->s_vec,
sp[1]->s_vec,sp[2]->s_vec, sp[3]->s_vec, sp[0]->s_n);
// post ("2 channels");
break;
}
}
static void scramble_tilde_free(t_scramble_tilde *x){
int n = x->grains - 1;
while (n--){
scramble_tilde_freegrain (scramble_tilde_getgrain(x->firstgrain,n),x->x_channels);
scramble_tilde_freegrain (x->ring,x->x_channels);
}
}
static void *scramble_tilde_new(t_floatarg c,t_floatarg b)
{
t_scramble_tilde *x = (t_scramble_tilde *)pd_new(scramble_tilde_class);
int i;
// x->bufL = NULL;
// x->bufR = NULL;
x->x_channels = (t_int)c;
if (x->x_channels > 2) {
x->x_channels = 2;
post ("maximum: 2 channels");
}
if (x->x_channels < 1) x->x_channels = 1;
outlet_new(&x->x_obj, gensym("signal"));
if (x->x_channels == 2){
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
outlet_new(&x->x_obj, gensym("signal"));
}
x->trigger1 = outlet_new(&x->x_obj, &s_float);
x->trigger2 = outlet_new(&x->x_obj, &s_float);
x->dir = 1;
x->pitch = 1;
x->actual_pitch = 1;
x->autopitch = 0;
x->semitones = 1;
x->autofollow = 1;
x->playmode = 1;
x->normalize = 0;
x->analize = 1;
x->flush = 0;
x->x_n = (int)b;
if (x->x_n >882000 ){x->x_n = 882000;}
if (x->x_n < 88200 ){x->x_n = 88200;}
/* x->rR = x->rL = x->wR = x->wL = NULL;*/
x->lowptr = 0;
x->lastlowptr = x->r_d = x->grain_r = -1;
x->mindist = 1024;
x->lowborder = 0.35;
// scramble_tilde_tempbuf(x,x->x_n);
x->ring = scramble_tilde_newgrain();
scramble_tilde_grainbuf(x->ring,x->x_channels,x->x_n);
x->valsum = x->valavg = x->valsumcount = 0;
x->valsummax = 1024;
/* the grains:*/
x->grains = 50;
x->r_grain = 0;
x->w_grain = x->n_grain = -1;
x->firstgrain = x->workgrain = scramble_tilde_newgrain();
for (i = 1;i < x->grains;i++){
x->workgrain->next = scramble_tilde_newgrain();
x->workgrain = x->workgrain->next;
}
return (x);
}
void scramble_tilde_float(t_scramble_tilde* x, t_float n){
x->play = n;
if (x->playmode == 2) {
x->n_grain = (int)n - 1;
x->grain_r = -1;
}
}
void scramble_tilde_buffer(t_scramble_tilde* x, t_float n){
if (n > 64) x->x_n = (int)n;
// post ("buffersize now:%d",x->x_n);
}
void scramble_tilde_threshold(t_scramble_tilde* x, t_float t){
if (t >0) {
x->lowborder = t;
x->autofollow = 0;
}else{
post ("threshold must be a positive value (0.1 - 0.8 makes sense)");
}
}
void scramble_tilde_grains(t_scramble_tilde* x, t_float g){
if ((g > 1) && (g < 2048) ) x->newgrains = (int)g;
else post ("scramble~: minimum # of grains must be 2 an maximum # is 2048");
}
void scramble_tilde_mindist(t_scramble_tilde* x, t_float t){
if ((t > 0) && (t < x->x_n)) x->mindist = (int)t;
else post ("scramble~: minimum distance must be positive value lower than buffersize");
}
void scramble_tilde_direction(t_scramble_tilde* x, t_float d){
if (d > 1) d = 1;
if (d < -1) d = -1;
x->dir = d;
}
void scramble_tilde_autofollow(t_scramble_tilde* x){
x->autofollow = 1;
}
void scramble_tilde_pitch(t_scramble_tilde* x, t_float p){
if (p > 0) x->pitch = p;
else post ("scramble~: pitch must be > 0");
}
void scramble_tilde_autopitch(t_scramble_tilde* x, t_float p){
x->autopitch = p;
}
void scramble_tilde_semitones(t_scramble_tilde* x, t_float p){
x->semitones = (int)p;
}
void scramble_tilde_normalize(t_scramble_tilde* x, t_float n){
x->normalize = n;
}
void scramble_tilde_analize(t_scramble_tilde* x, t_float f){
x->analize = f;
}
void scramble_tilde_flush(t_scramble_tilde* x){
x->flush = 1;
}
void scramble_tilde_playmode(t_scramble_tilde* x, t_float p){
x->playmode = (int)p;
if (x->playmode < 0) x->playmode = 0;
if (x->playmode < 1) x->playmode = 2;
switch (x->playmode){
case 0: post ("scramble~: playmode off");
break;
case 1: post ("scramble~: active playmode");
break;
case 2: post ("scramble~: passive playmode");
break;
default: post ("scramble~: invalid playmode");
}
}
void scramble_tilde_setup(void)
{
scramble_tilde_class = class_new(gensym("scramble~"), (t_newmethod) scramble_tilde_new, 0,
sizeof(t_scramble_tilde), 0, A_DEFFLOAT,A_DEFFLOAT, 0);
class_addfloat(scramble_tilde_class,scramble_tilde_float);
class_addmethod(scramble_tilde_class, nullfn, gensym("signal"), 0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_dsp, gensym("dsp"), 0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_buffer, gensym("buffer"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_threshold, gensym("threshold"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_grains, gensym("grains"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_mindist, gensym("min_length"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_direction, gensym("direction"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_autofollow, gensym("autofollow"),0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_pitch, gensym("pitch"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_autopitch, gensym("autopitch"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_semitones, gensym("semitones"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_flush, gensym("flush"), 0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_normalize, gensym("normalize"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_analize, gensym("analize"), A_DEFFLOAT,0);
class_addmethod(scramble_tilde_class, (t_method) scramble_tilde_playmode, gensym("playmode"), A_DEFFLOAT,0);
}
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