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#include "MSPd.h"
#include "fftease.h"
#if MSP
void *thresher_class;
#endif
#if PD
static t_class *thresher_class;
#endif
#define OBJECT_NAME "thresher~"
#define DEFAULT_HOLD (40.0)
typedef struct _thresher
{
#if MSP
t_pxobject x_obj;
#endif
#if PD
t_object x_obj;
float x_f;
#endif
int R;
int N;
int N2;
int Nw;
int Nw2;
int D;
int i;
int in_count;
float *Wanal;
float *Wsyn;
float *input;
float *Hwin;
// float *winput;
float *buffer;
float *channel;
float *output;
/* thresher vars */
float move_threshold;
float *composite_frame ;
int *frames_left;
int max_hold_frames;
float max_hold_time;
int first_frame;
float damping_factor ;
short thresh_connected;
short damping_connected;
// for convert
float *c_lastphase_in;
float *c_lastphase_out;
float c_fundamental;
float c_factor_in;
float c_factor_out;
// for fast fft
float mult;
float *trigland;
int *bitshuffle;
short mute;
short bypass;
int winfac;
int overlap;
float tadv;
} t_thresher;
void *thresher_new(t_symbol *s, int argc, t_atom *argv);
t_int *offset_perform(t_int *w);
t_int *thresher_perform(t_int *w);
void thresher_dsp(t_thresher *x, t_signal **sp, short *count);
void thresher_assist(t_thresher *x, void *b, long m, long a, char *s);
void thresher_float(t_thresher *x, double f);
void thresher_mute(t_thresher *x, t_floatarg f);
void thresher_bypass(t_thresher *x, t_floatarg f);
void thresher_free( t_thresher *x );
void thresher_overlap(t_thresher *x, t_floatarg f);
void thresher_winfac(t_thresher *x, t_floatarg f);
void thresher_fftinfo(t_thresher *x);
void thresher_init(t_thresher *x, short initialized);
#if MSP
void main(void)
{
setup((t_messlist **)&thresher_class, (method)thresher_new, (method)thresher_free,
(short)sizeof(t_thresher), 0L, A_GIMME, 0);
addmess((method)thresher_dsp, "dsp", A_CANT, 0);
addmess((method)thresher_assist,"assist",A_CANT,0);
addmess((method)thresher_mute,"mute",A_FLOAT,0);
addmess((method)thresher_bypass,"bypass",A_FLOAT,0);
addmess((method)thresher_overlap,"overlap",A_DEFFLOAT,0);
addmess((method)thresher_winfac,"winfac",A_DEFFLOAT,0);
addmess((method)thresher_fftinfo,"fftinfo",0);
addfloat((method)thresher_float);
dsp_initclass();
post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
}
#endif
#if PD
void thresher_tilde_setup(void)
{
thresher_class = class_new(gensym("thresher~"), (t_newmethod)thresher_new,
(t_method)thresher_free ,sizeof(t_thresher), 0,A_GIMME,0);
CLASS_MAINSIGNALIN(thresher_class, t_thresher, x_f );
class_addmethod(thresher_class, (t_method)thresher_dsp, gensym("dsp"), 0);
class_addmethod(thresher_class, (t_method)thresher_mute, gensym("mute"), A_DEFFLOAT,0);
class_addmethod(thresher_class, (t_method)thresher_bypass, gensym("bypass"), A_DEFFLOAT,0);
class_addmethod(thresher_class, (t_method)thresher_assist, gensym("assist"), 0);
class_addmethod(thresher_class,(t_method)thresher_overlap,gensym("overlap"),A_FLOAT,0);
class_addmethod(thresher_class,(t_method)thresher_winfac,gensym("winfac"),A_FLOAT,0);
class_addmethod(thresher_class,(t_method)thresher_fftinfo,gensym("fftinfo"),0);
post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
}
#endif
void thresher_overlap(t_thresher *x, t_floatarg f)
{
int i = (int) f;
if(!fftease_power_of_two(i)){
error("%f is not a power of two",f);
return;
}
x->overlap = i;
thresher_init(x,1);
}
void thresher_winfac(t_thresher *x, t_floatarg f)
{
int i = (int)f;
if(!fftease_power_of_two(i)){
error("%f is not a power of two",f);
return;
}
x->winfac = i;
thresher_init(x,2);
}
void thresher_fftinfo(t_thresher *x)
{
if( ! x->overlap ){
post("zero overlap!");
return;
}
post("%s: FFT size %d, hopsize %d, windowsize %d", OBJECT_NAME, x->N, x->N/x->overlap, x->Nw);
}
void thresher_free(t_thresher *x){
#if MSP
dsp_free( (t_pxobject *) x);
#endif
freebytes(x->c_lastphase_in,0);
freebytes(x->c_lastphase_out,0);
freebytes(x->trigland,0);
freebytes(x->bitshuffle,0);
freebytes(x->Wanal,0);
freebytes(x->Wsyn,0);
freebytes(x->input,0);
freebytes(x->Hwin,0);
freebytes(x->buffer,0);
freebytes(x->channel,0);
freebytes(x->output,0);
freebytes(x->composite_frame,0);
freebytes(x->frames_left,0);
}
void thresher_mute(t_thresher *x, t_floatarg f){
x->mute = (short)f;
}
void thresher_bypass(t_thresher *x, t_floatarg f){
x->bypass = (short)f;
}
void thresher_assist (t_thresher *x, void *b, long msg, long arg, char *dst)
{
if (msg==1) {
switch (arg) {
case 0:
sprintf(dst,"(signal) Input");
break;
case 1:
sprintf(dst,"(signal/float) Threshold");
break;
case 2:
sprintf(dst,"(signal/float) Damping Factor");
break;
}
} else if (msg==2) {
sprintf(dst,"(signal) Output");
}
}
void *thresher_new(t_symbol *s, int argc, t_atom *argv)
{
#if MSP
t_thresher *x = (t_thresher *)newobject(thresher_class);
dsp_setup((t_pxobject *)x,3);
outlet_new((t_pxobject *)x, "signal");
#endif
#if PD
t_thresher *x = (t_thresher *)pd_new(thresher_class);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("signal"), gensym("signal"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("signal"), gensym("signal"));
outlet_new(&x->x_obj, gensym("signal"));
#endif
x->move_threshold = atom_getfloatarg(0, argc, argv);
x->damping_factor = atom_getfloatarg(1, argc, argv);
x->overlap = atom_getfloatarg( 2, argc, argv );
x->winfac = atom_getfloatarg( 3, argc, argv );
// post("thresh %f damper %f overlap %d winfac %d", x->move_threshold, x->damping_factor, x->overlap, x->winfac);
/* if overlap is zero we crash so should protect against bad input parameters*/
x->D = sys_getblksize();
x->R = sys_getsr();
thresher_init(x,0);
return (x);
}
void thresher_init(t_thresher *x, short initialized)
{
int i;
if(!x->D)
x->D = 256;
if(!x->R)
x->R = 44100;
if(!fftease_power_of_two(x->overlap) )
x->overlap = 4;
if(!fftease_power_of_two(x->winfac) )
x->winfac = 1;
x->N = x->D * x->overlap;
x->Nw = x->N * x->winfac;
limit_fftsize(&x->N,&x->Nw,OBJECT_NAME);
x->N2 = (x->N)>>1;
x->Nw2 = (x->Nw)>>1;
x->in_count = -(x->Nw);
x->mult = 1. / (float) x->N;
x->tadv = (float) x->D / (float) x->R ;
if(!initialized){
x->mute = 0;
x->bypass = 0;
if(!x->damping_factor){
x->damping_factor = .95;
}
if(!x->move_threshold){
x->move_threshold = .00001 ;
}
x->first_frame = 1;
x->max_hold_time = DEFAULT_HOLD ;
x->max_hold_frames = x->max_hold_time / x->tadv;
x->c_fundamental = (float) x->R/( (x->N2)<<1 );
x->c_factor_in = (float) x->R/((float)x->D * TWOPI);
x->c_factor_out = TWOPI * (float) x->D / (float) x->R;
x->Wanal = (float *) getbytes( (MAX_Nw) * sizeof(float));
x->Wsyn = (float *) getbytes( (MAX_Nw) * sizeof(float));
x->Hwin = (float *) getbytes( (MAX_Nw) * sizeof(float));
x->input = (float *) getbytes( MAX_Nw * sizeof(float) );
x->output = (float *) getbytes( MAX_Nw * sizeof(float) );
x->buffer = (float *) getbytes( MAX_N * sizeof(float) );
x->channel = (float *) getbytes( (MAX_N+2) * sizeof(float) );
x->bitshuffle = (int *) getbytes( MAX_N * 2 * sizeof( int ) );
x->trigland = (float *) getbytes( MAX_N * 2 * sizeof( float ) );
x->c_lastphase_in = (float *) getbytes( (MAX_N2+1) * sizeof(float) );
x->c_lastphase_out = (float *) getbytes( (MAX_N2+1) * sizeof(float) );
x->composite_frame = (float *) getbytes( (MAX_N+2) * sizeof(float) );
x->frames_left = (int *) getbytes( (MAX_N+2) * sizeof(int) );
}
memset((char *)x->input,0,x->Nw * sizeof(float));
memset((char *)x->output,0,x->Nw * sizeof(float));
memset((char *)x->c_lastphase_in,0,(x->N2+1) * sizeof(float));
memset((char *)x->c_lastphase_out,0,(x->N2+1) * sizeof(float));
memset((char *)x->frames_left,0,(x->N+2) * sizeof(float));
init_rdft(x->N, x->bitshuffle, x->trigland);
makehanning(x->Hwin, x->Wanal, x->Wsyn, x->Nw, x->N, x->D, 0);
}
t_int *thresher_perform(t_int *w)
{
float sample, outsamp ;
int i,j;
t_thresher *x = (t_thresher *) (w[1]);
float *in = (t_float *)(w[2]);
float *inthresh = (t_float *)(w[3]);
float *damping = (t_float *)(w[4]);
float *out = (t_float *)(w[5]);
int n = (int)(w[6]);
float *input = x->input;
float *output = x->output;
float *buffer = x->buffer;
float *Wanal = x->Wanal;
float *Wsyn = x->Wsyn;
float *channel = x->channel;
float damping_factor = x->damping_factor;
int max_hold_frames = x->max_hold_frames;
int *frames_left = x->frames_left;
float *composite_frame = x->composite_frame;
float *c_lastphase_in = x->c_lastphase_in;
float *c_lastphase_out = x->c_lastphase_out;
float c_fundamental = x->c_fundamental;
float c_factor_in = x->c_factor_in;
float c_factor_out = x->c_factor_out;
int *bitshuffle = x->bitshuffle;
float *trigland = x->trigland;
float mult = x->mult;
int in_count = x->in_count;
int R = x->R;
int N = x->N;
int N2 = x->N2;
int D = x->D;
int Nw = x->Nw;
float move_threshold = x->move_threshold;
if( x->mute ) {
for( j = 0; j < D; j++) {
*out++ = 0.0 ;
}
return (w+7);
}
if ( x->bypass ) {
for( j = 0; j < D; j++) {
*out++ = *in++ ;
}
return (w+7);
}
if( x->thresh_connected ) {
move_threshold = *inthresh ;
}
if( x->damping_connected ) {
damping_factor = *damping ;
}
in_count += D;
for ( j = 0 ; j < Nw - D ; j++ )
input[j] = input[j+D];
for ( j = Nw - D; j < Nw; j++ ) {
input[j] = *in++;
}
fold( input, Wanal, Nw, buffer, N, in_count );
rdft( N, 1, buffer, bitshuffle, trigland );
convert( buffer, channel, N2, c_lastphase_in, c_fundamental, c_factor_in );
if( x->first_frame ){
for ( i = 0; i < N+2; i++ ){
composite_frame[i] = channel[i];
frames_left[i] = max_hold_frames;
}
x->first_frame = 0;
} else {
for( i = 0; i < N+2; i += 2 ){
if(fabs( composite_frame[i] - channel[i] ) > move_threshold ||
frames_left[i] <= 0 ){
composite_frame[i] = channel[i];
composite_frame[i+1] = channel[i+1];
frames_left[i] = max_hold_frames;
} else {
--(frames_left[i]);
composite_frame[i] *= damping_factor;
}
}
}
unconvert( composite_frame, buffer, N2, c_lastphase_out, c_fundamental, c_factor_out );
rdft( N, -1, buffer, bitshuffle, trigland );
overlapadd( buffer, N, Wsyn, output, Nw, in_count );
for ( j = 0; j < D; j++ )
*out++ = output[j] * mult;
for ( j = 0; j < Nw - D; j++ )
output[j] = output[j+D];
for ( j = Nw - D; j < Nw; j++ )
output[j] = 0.;
x->in_count = in_count;
x->damping_factor = damping_factor;
return (w+7);
}
#if MSP
void thresher_float(t_thresher *x, double f) // Look at floats at inlets
{
int inlet = x->x_obj.z_in;
if (inlet == 1)
{
x->move_threshold = f;
} else if (inlet == 2) {
x->damping_factor = f;
}
}
#endif
void thresher_dsp(t_thresher *x, t_signal **sp, short *count)
{
#if MSP
x->thresh_connected = count[1];
x->damping_connected = count[2];
#endif
#if PD
x->thresh_connected = 1;
x->damping_connected = 1;
#endif
if(sp[0]->s_n != x->D || x->R != sp[0]->s_sr){
x->D = sp[0]->s_n;
x->R = sp[0]->s_sr;
thresher_init(x,1);
}
dsp_add(thresher_perform, 6, x, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec,
sp[0]->s_n);
}
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