diff options
Diffstat (limited to 'swinger~.c')
| -rw-r--r-- | swinger~.c | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/swinger~.c b/swinger~.c new file mode 100644 index 0000000..b1c2b3d --- /dev/null +++ b/swinger~.c @@ -0,0 +1,408 @@ +#include "MSPd.h"
+#include "fftease.h"
+
+#if MSP
+void *swinger_class;
+#endif
+
+#if PD
+static t_class *swinger_class;
+#endif
+
+#define OBJECT_NAME "swinger~"
+
+typedef struct _swinger
+{
+#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;
+ int *bitshuffle;
+
+ float *Wanal;
+ float *Wsyn;
+ float *inputOne;
+ float *inputTwo;
+ float *Hwin;
+ float *bufferOne;
+ float *bufferTwo;
+ float *channelOne;
+ float *channelTwo;
+ float *output;
+ float mult;
+ float *trigland;
+ int overlap;//overlap factor
+ int winfac;// window factor
+ int vs;//last measurement of vector size
+ short mute;
+
+} t_swinger;
+
+
+/* msp function prototypes */
+
+void *swinger_new(t_symbol *s, int argc, t_atom *argv);
+t_int *swinger_perform(t_int *w);
+void swinger_dsp(t_swinger *x, t_signal **sp, short *count);
+void swinger_assist(t_swinger *x, void *b, long m, long a, char *s);
+void swinger_mute(t_swinger *x, t_floatarg state);
+void swinger_init(t_swinger *x, short initialized);
+void swinger_dsp_free(t_swinger *x);
+void swinger_overlap(t_swinger *x, t_floatarg o);
+void swinger_winfac(t_swinger *x, t_floatarg o);
+//int power_of_two(int p);
+void swinger_fftinfo(t_swinger *x);
+
+#if MSP
+
+void main(void)
+{
+ setup((t_messlist **)&swinger_class, (method) swinger_new, (method)dsp_free, (short)sizeof(t_swinger),
+ 0L, A_GIMME, 0);
+
+ addmess((method)swinger_dsp, "dsp", A_CANT, 0);
+ addmess((method)swinger_assist,"assist",A_CANT,0);
+ addmess((method)swinger_mute,"mute",A_FLOAT,0);
+ addmess((method)swinger_overlap,"overlap",A_FLOAT,0);
+ addmess((method)swinger_winfac,"winfac",A_FLOAT,0);
+ addmess((method)swinger_fftinfo,"fftinfo",0);
+ dsp_initclass();
+ post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
+}
+#endif
+#if PD
+/* Pd Initialization */
+void swinger_tilde_setup(void)
+{
+ swinger_class = class_new(gensym("swinger~"), (t_newmethod)swinger_new,
+ (t_method)swinger_dsp_free ,sizeof(t_swinger), 0,A_GIMME,0);
+ CLASS_MAINSIGNALIN(swinger_class, t_swinger, x_f);
+ class_addmethod(swinger_class, (t_method)swinger_dsp, gensym("dsp"), 0);
+ class_addmethod(swinger_class, (t_method)swinger_mute, gensym("mute"), A_DEFFLOAT,0);
+ class_addmethod(swinger_class, (t_method)swinger_overlap, gensym("overlap"), A_DEFFLOAT,0);
+ class_addmethod(swinger_class, (t_method)swinger_winfac, gensym("winfac"), A_DEFFLOAT,0);
+ class_addmethod(swinger_class, (t_method)swinger_fftinfo, gensym("fftinfo"),0);
+ post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
+}
+#endif
+
+/* diagnostic messages for Max */
+void swinger_fftinfo(t_swinger *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 swinger_mute(t_swinger *x, t_floatarg state)
+{
+ x->mute = state;
+}
+
+void swinger_assist (t_swinger *x, void *b, long msg, long arg, char *dst)
+{
+
+ if (msg == 1) {
+
+ switch (arg) {
+
+ case 0: sprintf(dst,"(signal) Signal to be Phase Replaced ");
+ break;
+
+ case 1: sprintf(dst,"(signal) Signal to Supply Phase Information ");
+ break;
+ }
+ }
+
+ else {
+
+ if (msg == 2)
+ sprintf(dst,"(signal) Swinger Output");
+
+ }
+}
+
+
+void *swinger_new(t_symbol *s, int argc, t_atom *argv)
+{
+#if MSP
+ t_swinger *x = (t_swinger *) newobject(swinger_class);
+ dsp_setup((t_pxobject *)x,2);
+ outlet_new((t_pxobject *)x, "signal");
+ /* make sure that signal inlets and outlets have their own memory */
+ x->x_obj.z_misc |= Z_NO_INPLACE;
+#endif
+#if PD
+ t_swinger *x = (t_swinger *)pd_new(swinger_class);
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd,gensym("signal"), gensym("signal"));
+ outlet_new(&x->x_obj, gensym("signal"));
+#endif
+
+ /* INITIALIZATIONS */
+ x->overlap = atom_getfloatarg(0,argc,argv);
+ x->winfac = atom_getfloatarg(1,argc,argv);
+ if(!x->winfac)
+ x->winfac = 1;
+ if(!x->overlap)
+ x->overlap = 4;
+ x->vs = sys_getblksize();
+ x->R = sys_getsr();
+ swinger_init(x,0);
+ return (x);
+}
+
+void swinger_overlap(t_swinger *x, t_floatarg o)
+{
+ if(!power_of_two(o)){
+ post("%f is not a power of two",o);
+ return;
+ }
+ x->overlap = o;
+ swinger_init(x,1);
+}
+
+void swinger_winfac(t_swinger *x, t_floatarg f)
+{
+ if(!power_of_two(f)){
+ error("%f is not a power of two",f);
+ return;
+ }
+ x->winfac = (int)f;
+ swinger_init(x,1);
+}
+
+void swinger_init(t_swinger *x, short initialized)
+{
+ int i;
+ x->D = x->vs;
+ x->N = x->vs * 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->Wanal = (float *) getbytes( MAX_Nw * sizeof(float) );
+ x->Wsyn = (float *) getbytes( MAX_Nw * sizeof(float) );
+ x->Hwin = (float *) getbytes( MAX_Nw * sizeof(float) );
+ x->inputOne = (float *) getbytes( MAX_Nw * sizeof(float) );
+ x->inputTwo = (float *) getbytes( MAX_Nw * sizeof(float) );
+ x->bufferOne = (float *) getbytes( MAX_N * sizeof(float) );
+ x->bufferTwo = (float *) getbytes( MAX_N * sizeof(float) );
+ x->channelOne = (float *) getbytes( (MAX_N+2) * sizeof(float) );
+ x->channelTwo = (float *) getbytes( (MAX_N+2) * sizeof(float) );
+ x->output = (float *) getbytes( MAX_Nw * sizeof(float) );
+ x->bitshuffle = (int *) getbytes( MAX_N * 2 * sizeof( int ) );
+ x->trigland = (float *) getbytes( MAX_N * 2 * sizeof( float ) );
+ }
+ memset((char *)x->inputOne,0,x->Nw * sizeof(float));
+ memset((char *)x->inputTwo,0,x->Nw * sizeof(float));
+ memset((char *)x->output,0,x->Nw * sizeof(float));
+
+ init_rdft(x->N, x->bitshuffle, x->trigland);
+ makehanning(x->Hwin, x->Wanal, x->Wsyn, x->Nw, x->N, x->D, 1);// wants an ODD window
+
+}
+
+t_int *swinger_perform(t_int *w)
+{
+
+ int n,
+ i,j,
+ inCount,
+ R,
+ N,
+ N2,
+ D,
+ Nw,
+ invert = 1,
+ even, odd,
+ *bitshuffle;
+
+ float maxamp,
+ threshMult = 1.,
+ mult,
+ a1, b1,
+ a2, b2,
+ *inputOne,
+ *inputTwo,
+ *bufferOne,
+ *bufferTwo,
+ *output,
+ *Wanal,
+ *Wsyn,
+ *channelOne,
+ *channelTwo,
+ *trigland;
+ t_float *inOne,
+ *inTwo,
+ *out;
+
+ /* get our inlets and outlets */
+
+ t_swinger *x = (t_swinger *) (w[1]);
+ inOne = (t_float *)(w[2]);
+ inTwo = (t_float *)(w[3]);
+
+ out = (t_float *)(w[4]);
+ n = (int)(w[5]);
+
+ /* dereference structure */
+
+ inputOne = x->inputOne;
+ inputTwo = x->inputTwo;
+ bufferOne = x->bufferOne;
+ bufferTwo = x->bufferTwo;
+ inCount = x->inCount;
+ R = x->R;
+ N = x->N;
+ N2 = x->N2;
+ D = x->D;
+ Nw = x->Nw;
+ Wanal = x->Wanal;
+ Wsyn = x->Wsyn;
+ output = x->output;
+ channelOne = x->channelOne;
+ channelTwo = x->channelTwo;
+ bitshuffle = x->bitshuffle;
+ trigland = x->trigland;
+ mult = x->mult;
+
+ /* no computation if muted */
+
+ if(x->mute){
+ while(n--)
+ *out++ = 0.0;
+ return w+6;
+ }
+
+ inCount += D;
+
+ for ( j = 0 ; j < Nw - D ; j++ ) {
+ inputOne[j] = inputOne[j+D];
+ inputTwo[j] = inputTwo[j+D];
+ }
+
+ for ( j = Nw-D; j < Nw; j++ ) {
+ inputOne[j] = *inOne++;
+ inputTwo[j] = *inTwo++;
+ }
+
+ /* apply hamming window and fold our window buffer into the fft buffer */
+
+ fold( inputOne, Wanal, Nw, bufferOne, N, inCount );
+ fold( inputTwo, Wanal, Nw, bufferTwo, N, inCount );
+
+ /* do an fft */
+
+ rdft( N, 1, bufferOne, bitshuffle, trigland );
+ rdft( N, 1, bufferTwo, bitshuffle, trigland );
+
+ /* use redundant coding for speed, even though moving the invert variable
+ comparison outside of the for loop will give us only a minimal performance
+ increase (hypot and atan2 are the most intensive portions of this code).
+ consider adding a table lookup for atan2 instead.
+ */
+
+ /* convert to polar coordinates from complex values */
+
+ for ( i = 0; i <= N2; i++ ) {
+ odd = ( even = i<<1 ) + 1;
+
+ a1 = ( i == N2 ? *(bufferOne+1) : *(bufferOne+even) );
+ b1 = ( i == 0 || i == N2 ? 0. : *(bufferOne+odd) );
+
+ a2 = ( i == N2 ? *(bufferTwo+1) : *(bufferTwo+even) );
+ b2 = ( i == 0 || i == N2 ? 0. : *(bufferTwo+odd) );
+
+ /* replace signal one's phases with those of signal two */
+
+ *(channelOne+even) = hypot( a1, b1 );
+ *(channelOne+odd) = -atan2( b2, a2 );
+ }
+
+ for ( i = 0; i <= N2; i++ ) {
+
+ odd = ( even = i<<1 ) + 1;
+
+ *(bufferOne+even) = *(channelOne+even) * cos( *(channelOne+odd) );
+
+ if ( i != N2 )
+ *(bufferOne+odd) = -(*(channelOne+even)) * sin( *(channelOne+odd) );
+ }
+
+
+ /* do an inverse fft */
+
+ rdft( N, -1, bufferOne, bitshuffle, trigland );
+
+
+
+ /* dewindow our result */
+
+ overlapadd( bufferOne, N, Wsyn, output, Nw, inCount);
+
+ /* set our output and adjust our retaining output buffer */
+
+ 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.;
+
+
+ /* restore state variables */
+
+ x->inCount = inCount % Nw;
+ return (w+6);
+}
+
+void swinger_dsp_free( t_swinger *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->Hwin,0);
+ freebytes(x->inputOne,0);
+ freebytes(x->inputTwo,0);
+ freebytes(x->bufferOne,0);
+ freebytes(x->bufferTwo,0);
+ freebytes(x->channelOne,0);
+ freebytes(x->channelTwo,0);
+ freebytes(x->output,0);
+}
+
+void swinger_dsp(t_swinger *x, t_signal **sp, short *count)
+{
+ 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;
+ swinger_init(x,1);
+ }
+ dsp_add(swinger_perform, 5, x,
+ sp[0]->s_vec,sp[1]->s_vec,sp[2]->s_vec,sp[0]->s_n);
+}
+
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