From b418fb91e7bb45d7b5f1eb8b19703441ae94eb13 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Thu, 9 Feb 2006 16:18:39 +0000
Subject: got everything building and working, including building
 single-object/single-file objects with a shared dylib.  Now got to get it
 integrated into the build system

svn path=/trunk/externals/fftease/; revision=4574
---
 scrape~.c | 494 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 494 insertions(+)
 create mode 100644 scrape~.c

(limited to 'scrape~.c')

diff --git a/scrape~.c b/scrape~.c
new file mode 100644
index 0000000..bd435f7
--- /dev/null
+++ b/scrape~.c
@@ -0,0 +1,494 @@
+#include "MSPd.h"
+#include "fftease.h"
+
+
+#if MSP
+void *scrape_class;
+#endif 
+
+#if PD
+static t_class *scrape_class;
+#endif
+
+#define OBJECT_NAME "scrape~"
+
+typedef struct _scrape
+{
+#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	inCount;
+	float *Wanal;	
+	float *Wsyn;	
+	float *input;	
+	float *Hwin;
+	float *buffer;
+	float *channel;
+	float *output;
+	//
+	float knee;
+	float cutoff;
+	float scrape_mult;
+	float thresh1;
+	float thresh2;
+	float *threshfunc;
+	short connected[8];
+	short mute;
+	short bypass;
+	//
+	float mult; 
+	float *trigland;
+	int *bitshuffle;
+	int overlap;//overlap factor
+		int winfac;//window factor
+			int vs;//vector size
+} t_scrape;
+
+void *scrape_new(t_symbol *msg, short argc, t_atom *argv);
+t_int *offset_perform(t_int *w);
+t_int *scrape_perform(t_int *w);
+void scrape_dsp(t_scrape *x, t_signal **sp, short *count);
+void scrape_assist(t_scrape *x, void *b, long m, long a, char *s);
+void scrape_float(t_scrape *x, double f) ;
+void update_thresh_function( t_scrape *x );
+void scrape_frowned( float *S, float *C, float *threshfunc, float fmult, int N2 );
+void scrape_mute(t_scrape *x, t_floatarg toggle);
+void scrape_bypass(t_scrape *x, t_floatarg toggle);
+void scrape_dsp_free( t_scrape *x );
+void update_thresh_function( t_scrape *x );
+void scrape_init(t_scrape *x, short initialized);
+void scrape_fftinfo(t_scrape *x);
+void scrape_overlap(t_scrape *x, t_floatarg f);
+void scrape_winfac(t_scrape *x, t_floatarg f);
+
+#if MSP
+void main(void)
+{
+	setup((t_messlist **) &scrape_class, (method)scrape_new, (method)scrape_dsp_free, 
+		  (short)sizeof(t_scrape), 0, A_GIMME, 0);
+	addmess((method)scrape_dsp, "dsp", A_CANT, 0);
+	addmess((method)scrape_assist,"assist",A_CANT,0);
+	addmess ((method)scrape_mute, "mute", A_FLOAT, 0);
+	addmess ((method)scrape_bypass, "bypass", A_FLOAT, 0);
+	addmess((method)scrape_overlap,"overlap",A_DEFFLOAT,0);
+	addmess((method)scrape_winfac,"winfac",A_DEFFLOAT,0);
+	addmess((method)scrape_fftinfo,"fftinfo",0);  addfloat((method) scrape_float);
+	dsp_initclass();
+	post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
+}
+#endif
+
+#if PD
+void scrape_tilde_setup(void)
+{
+	scrape_class = class_new(gensym("scrape~"), (t_newmethod)scrape_new, 
+							 (t_method)scrape_dsp_free ,sizeof(t_scrape), 0,A_GIMME,0);
+	CLASS_MAINSIGNALIN(scrape_class, t_scrape, x_f);
+	class_addmethod(scrape_class, (t_method)scrape_dsp, gensym("dsp"), 0);
+	class_addmethod(scrape_class, (t_method)scrape_assist, gensym("assist"), 0);
+	class_addmethod(scrape_class, (t_method)scrape_mute, gensym("mute"), A_DEFFLOAT,0);
+	class_addmethod(scrape_class, (t_method)scrape_bypass, gensym("bypass"), A_DEFFLOAT,0);
+	class_addmethod(scrape_class, (t_method)scrape_overlap, gensym("overlap"), A_DEFFLOAT,0);
+	class_addmethod(scrape_class,(t_method)scrape_winfac,gensym("winfac"),A_FLOAT,0);
+	class_addmethod(scrape_class,(t_method)scrape_fftinfo,gensym("fftinfo"),0);
+	
+	post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
+}
+#endif
+
+
+void scrape_dsp_free( t_scrape *x )
+{
+#if MSP
+	dsp_free( (t_pxobject *) x);
+#endif
+	
+	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->threshfunc,0);
+}
+
+void scrape_assist (t_scrape *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,"(float/signal) Knee Frequency"); break;
+			case 2: sprintf(dst,"(float/signal) Cutoff Frequency"); break;
+			case 3: sprintf(dst,"(float/signal) Knee Threshold"); break;
+			case 4: sprintf(dst,"(float/signal) Cutoff Threshold"); break;
+			case 5: sprintf(dst,"(float/signal) Multiplier For Weak Bins"); break;
+		}
+	} else if (msg==2) {
+		sprintf(dst,"(signal) Output");
+	}
+}
+
+void *scrape_new(t_symbol *msg, short argc, t_atom *argv)
+{
+#if MSP
+	t_scrape *x = (t_scrape *)newobject(scrape_class);
+	dsp_setup((t_pxobject *)x,6);
+	outlet_new((t_pxobject *)x, "signal");
+#endif
+#if PD
+	int i;
+	t_scrape *x = (t_scrape *)pd_new(scrape_class);
+	for(i=0;i<5;i++)
+		inlet_new(&x->x_obj, &x->x_obj.ob_pd,gensym("signal"), gensym("signal"));
+	outlet_new(&x->x_obj, gensym("signal"));
+#endif
+	x->knee = atom_getfloatarg(0, argc, argv);
+	x->cutoff = atom_getfloatarg(1, argc, argv);
+	x->thresh1 = atom_getfloatarg(2, argc, argv);
+	x->thresh2 = atom_getfloatarg(3, argc, argv);
+	x->scrape_mult = atom_getfloatarg(4, argc, argv);  
+	x->overlap = atom_getfloatarg(5, argc, argv); 
+	x->winfac = atom_getfloatarg(6, argc, argv);  
+	if(x->knee <= 0)
+		x->knee = 1000.0;
+	if(x->cutoff <= 0)
+		x->cutoff = 4000.0;
+	if(x->thresh1 <= 0)
+		x->thresh1 = .0001 ;
+	if(x->thresh2 <= 0)
+		x->thresh2 = .09 ;
+	if( x->scrape_mult < 0 || x->scrape_mult > 10 ){
+		x->scrape_mult = 0.1;
+	}
+	if(!power_of_two(x->overlap))
+		x->overlap = 4;
+	if(!power_of_two(x->winfac))
+		x->winfac = 1;
+	
+	x->vs = sys_getblksize();
+	x->R = sys_getsr();
+	scrape_init(x,0);
+	return (x);
+}
+
+void scrape_init(t_scrape *x, short initialized)
+{
+	int i;
+	
+	x->D = x->vs;
+	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->inCount = -(x->Nw);
+	x->mult = 1. / (float) x->N;
+	
+	if(!initialized){
+		x->mute = 0;
+		
+		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->threshfunc = (float *) getbytes(MAX_N2 * sizeof(float));
+	}
+	memset((char *)x->input,0,x->Nw * sizeof(float));
+	memset((char *)x->output,0,x->Nw * sizeof(float));  
+	makehanning( x->Hwin, x->Wanal, x->Wsyn, x->Nw, x->N, x->D, 0);
+	init_rdft( x->N, x->bitshuffle, x->trigland);
+	if(initialized != 2)
+		update_thresh_function(x);
+}
+
+void scrape_overlap(t_scrape *x, t_floatarg f)
+{
+	int i = (int) f;
+	if(!power_of_two(i)){
+		error("%f is not a power of two",f);
+		return;
+	}
+	x->overlap = i;
+	scrape_init(x,1);
+}
+
+void scrape_winfac(t_scrape *x, t_floatarg f)
+{
+	int i = (int)f;
+	
+	if(!power_of_two(i)){
+		error("%f is not a power of two",f);
+		return;
+	}
+	x->winfac = i;
+	scrape_init(x,2);
+}
+
+void scrape_fftinfo(t_scrape *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);
+}
+
+#if MSP
+void scrape_float(t_scrape *x, double f) // Look at floats at inlets
+{
+	int inlet = x->x_obj.z_in;
+	
+	if (inlet == 1)
+    {
+		if( f> 50  && f < 18000) {
+			x->knee = f ;
+			update_thresh_function( x );	
+		}	
+		
+    }
+	else if (inlet == 2)
+    {
+		if( (f > x->knee)  && (f < 20000) ) {
+			x->cutoff = f ;
+			update_thresh_function( x );	
+		}
+    }
+	else if (inlet == 3)
+    {
+		x->thresh1 = f;
+		update_thresh_function( x );
+    }
+	else if (inlet == 4)
+    {
+		x->thresh2 = f;
+		update_thresh_function( x );
+    }
+	else if (inlet == 5)
+    {
+		if( f > 0 ) {
+			x->scrape_mult = f;
+		}
+    }
+} 
+#endif
+void update_thresh_function( t_scrape *x ) 
+{
+	float funda, curfreq, m1, m2;
+	int i;
+	
+	funda = (float)  x->R / ((float)x->N * 2.0 );
+	curfreq = funda ;
+	for( i = 0; i < x->N2; i++ ) {
+		if( curfreq  < x->knee ){
+			x->threshfunc[i] = 0.0 ;
+		} else if( curfreq >= x->knee && curfreq < x->cutoff ) {
+			m2 = (x->knee - curfreq) / (x->cutoff - x->knee) ;
+			m1 = 1.0 - m2 ;
+			x->threshfunc[i] = m1 * x->thresh1 + m2 * x->thresh2 ;
+		} else {
+			x->threshfunc[i] = x->thresh2;
+		}
+		curfreq += funda ;
+	}
+}
+
+void scrape_mute(t_scrape *x, t_floatarg toggle)
+{
+	x->mute = (short)toggle;	
+}
+
+void scrape_bypass(t_scrape *x, t_floatarg toggle)
+{
+	x->bypass = (short)toggle;	
+}
+
+
+t_int *scrape_perform(t_int *w)
+{
+	float sample, outsamp ;
+	
+	
+	
+	int	i,j;
+	float tmp ;	
+	
+	short update = 0;
+	
+	t_scrape *x = (t_scrape *) (w[1]);
+	t_float *in = (t_float *)(w[2]);
+	t_float *knee_freq = (t_float *)(w[3]);
+	t_float *cut_freq = (t_float *)(w[4]);
+	t_float *thresh1 = (t_float *)(w[5]);
+	t_float *thresh2 = (t_float *)(w[6]);
+	t_float *scrape_mult = (t_float *)(w[7]);
+	t_float *out = (t_float *)(w[8]);
+	t_int n = w[9];
+	
+	int inCount = x->inCount;
+	int R = x->R;
+	int N = x->N;
+	int N2 = x->N2;
+	int D = x->D;
+	int Nw = x->Nw;
+	float *Wanal = x->Wanal;
+	float *Wsyn = x->Wsyn;		
+	float *input = x->input;
+	float *output = x->output;
+	float *buffer = x->buffer;
+	float *channel = x->channel;
+	float mult = x->mult ;
+	int *bitshuffle = x->bitshuffle;
+	float *trigland = x->trigland ;      
+	float *threshfunc = x->threshfunc ;
+	short *connected = x->connected;
+	
+	if( x->mute ){
+		while( n-- ){
+			*out++ = 0.0;
+		}
+		return (w+10); // always what dsp_add says + 1
+	}
+	if( x->bypass ){
+		while( n-- ){
+			*out++ = *in++ * 0.5; // gain compensation
+		}
+		return (w+10); // always what dsp_add says + 1
+	}
+	if( connected[1] ){
+		tmp = *knee_freq++;
+		if( tmp > 50 && tmp < 20000 ){
+			x->knee = tmp;
+			update = 1;
+		}
+	}
+	if( connected[2] ){
+		tmp = *cut_freq++;
+		if( tmp > x->knee && tmp < 20000 ){
+			x->cutoff = *cut_freq++;
+			update = 1;
+		}
+	}
+	if( connected[3] ){
+		x->thresh1 = *thresh1++ ;
+		update = 1;
+	}
+	if( connected[4] ){
+		x->thresh2 = *thresh2++ ;
+		update = 1;
+	}
+	if( connected[5] ){
+		x->scrape_mult = *scrape_mult++ ;
+	}
+	
+	if( update ){
+		update_thresh_function( x );	
+	}
+	
+	x->inCount += 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, inCount );	
+	rdft( N, 1, buffer, bitshuffle, trigland );
+	
+	scrape_frowned( buffer, channel, threshfunc, x->scrape_mult, N2 );
+	
+	rdft( N, -1, buffer, bitshuffle, trigland );
+	overlapadd( buffer, N, Wsyn, output, Nw, inCount);
+	
+	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.;
+	
+	return (w+10); // always what dsp_add says + 1
+}		
+
+
+
+void scrape_frowned( float *S, float *C, float *threshfunc, float fmult, int N2 )
+
+{
+	int real, imag, amp, phase;
+	float a, b;
+	int i;
+	float maxamp = 1.;
+	
+	for( i = 0; i <= N2; i++ ){
+		amp = i<<1;
+		if( maxamp < C[amp] ){
+			maxamp = C[amp];
+		}
+	}
+	
+	for ( i = 0; i <= N2; i++ ) {
+		imag = phase = ( real = amp = i<<1 ) + 1;
+		a = ( i == N2 ? S[1] : S[real] );
+		b = ( i == 0 || i == N2 ? 0. : S[imag] );
+		C[amp] = hypot( a, b );
+		
+		if ( (C[amp]) < threshfunc[i] * maxamp ){
+			C[amp] *= fmult;
+		}
+		C[phase] = -atan2( b, a );
+	}
+	
+	for ( i = 0; i <= N2; i++ ) {
+		imag = phase = ( real = amp = i<<1 ) + 1;
+		S[real] = *(C+amp) * cos( *(C+phase) );
+		if ( i != N2 )
+			S[imag] = -*(C+amp) * sin( *(C+phase) );
+	}
+}
+
+void scrape_dsp(t_scrape *x, t_signal **sp, short *count)
+{
+	long i;
+#if MSP
+	for( i = 0; i < 6; i++ ){
+		x->connected[i] = count[i];
+	}
+#endif
+#if PD
+	for( i = 0; i < 6; i++ ){
+		x->connected[i] = 1;
+	}
+#endif
+	if(x->vs != sp[0]->s_n || x->R != sp[0]->s_sr){
+		x->vs = sp[0]->s_n;
+		x->R = sp[0]->s_sr;
+		scrape_init(x,1);
+	}
+	dsp_add(scrape_perform, 9, x, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec,  sp[3]->s_vec, 
+			sp[4]->s_vec, sp[5]->s_vec, 
+			sp[6]->s_vec, sp[0]->s_n);
+}
+
-- 
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