diff options
Diffstat (limited to 'cavoc~.c')
| -rw-r--r-- | cavoc~.c | 529 |
1 files changed, 529 insertions, 0 deletions
diff --git a/cavoc~.c b/cavoc~.c new file mode 100644 index 0000000..7bfcedc --- /dev/null +++ b/cavoc~.c @@ -0,0 +1,529 @@ +#include "MSPd.h"
+
+#include "fftease.h"
+
+#if MSP
+void *cavoc_class;
+#endif
+
+#if PD
+static t_class *cavoc_class;
+#endif
+
+#define OBJECT_NAME "cavoc~"
+
+typedef struct _cavoc
+{
+#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 *buffer;
+ float *channel;
+ float *output;
+
+ float frame_duration;
+ int max_bin;
+
+ float fundamental;
+ float *last_frame;
+ short left;
+ short right;
+ short center;
+ short *rule;
+ float density;
+ float start_breakpoint;
+ int hold_frames;
+ int frames_left;
+ int set_count;
+ // FFT
+ float *c_lastphase_out;
+ float c_fundamental;
+ float c_factor_out;
+ float mult;
+ float *trigland;
+ int *bitshuffle;
+ //
+ void *list_outlet;
+ t_atom *list_data;
+ short mute;
+ int overlap;
+ int winfac;
+ short external_trigger;
+ float hold_time;
+} t_cavoc;
+
+void *cavoc_new(t_symbol *msg, short argc, t_atom *argv);
+t_int *offset_perform(t_int *w);
+t_int *cavoc_perform(t_int *w);
+void cavoc_dsp(t_cavoc *x, t_signal **sp, short *count);
+void cavoc_assist(t_cavoc *x, void *b, long m, long a, char *s);
+void cavoc_free( t_cavoc *x );
+int cavoc_apply_rule( short left, short right, short center, short *rule);
+float cavoc_randf(float min, float max);
+void cavoc_rule (t_cavoc *x, t_symbol *msg, short argc, t_atom *argv);
+void cavoc_density (t_cavoc *x, t_floatarg density);
+void cavoc_hold_time (t_cavoc *x, t_floatarg hold_time);
+void cavoc_retune (t_cavoc *x, t_floatarg min, t_floatarg max);
+void cavoc_mute (t_cavoc *x, t_floatarg toggle);
+void cavoc_external_trigger(t_cavoc *x, t_floatarg toggle);
+void cavoc_init(t_cavoc *x,short initialized);
+void cavoc_overlap(t_cavoc *x, t_floatarg f);
+void cavoc_winfac(t_cavoc *x, t_floatarg f);
+void cavoc_fftinfo(t_cavoc *x);
+
+#if MSP
+void main(void)
+{
+ setup((t_messlist **)&cavoc_class, (method)cavoc_new, (method)cavoc_free,
+ (short)sizeof(t_cavoc), 0, A_GIMME, 0);
+ addmess((method)cavoc_dsp, "dsp", A_CANT, 0);
+ addmess((method)cavoc_assist,"assist",A_CANT,0);
+ addmess((method)cavoc_rule,"rule",A_GIMME,0);
+ addmess((method)cavoc_density,"density",A_FLOAT,0);
+ addmess((method)cavoc_hold_time,"hold_time",A_FLOAT,0);
+ addmess((method)cavoc_mute,"mute",A_FLOAT,0);
+ addmess((method)cavoc_external_trigger,"external_trigger",A_FLOAT,0);
+ addmess((method)cavoc_retune,"retune",A_FLOAT,A_FLOAT,0);
+ addmess((method)cavoc_overlap,"overlap",A_FLOAT,0);
+ addmess((method)cavoc_winfac,"winfac",A_FLOAT,0);
+ addmess((method)cavoc_fftinfo,"fftinfo",0);
+ dsp_initclass();
+ post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
+}
+#endif
+
+#if PD
+void cavoc_tilde_setup(void){
+ cavoc_class = class_new(gensym("cavoc~"), (t_newmethod)cavoc_new,
+ (t_method)cavoc_free ,sizeof(t_cavoc), 0,A_GIMME,0);
+ CLASS_MAINSIGNALIN(cavoc_class, t_cavoc, x_f);
+ class_addmethod(cavoc_class,(t_method)cavoc_dsp,gensym("dsp"),0);
+ class_addmethod(cavoc_class,(t_method)cavoc_mute,gensym("mute"),A_FLOAT,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_overlap,gensym("overlap"),A_FLOAT,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_winfac,gensym("winfac"),A_FLOAT,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_rule,gensym("rule"),A_GIMME,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_density,gensym("density"),A_FLOAT,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_hold_time,gensym("hold_time"),A_FLOAT,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_external_trigger,gensym("external_trigger"),A_FLOAT,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_retune,gensym("retune"),A_FLOAT,A_FLOAT,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_winfac,gensym("winfac"),A_FLOAT,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_overlap,gensym("overlap"),A_FLOAT,0);
+ class_addmethod(cavoc_class,(t_method)cavoc_fftinfo,gensym("fftinfo"),0);
+ post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
+}
+#endif
+
+void cavoc_fftinfo( t_cavoc *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 cavoc_overlap(t_cavoc *x, t_floatarg f)
+{
+ if(!power_of_two(f)){
+ error("%f is not a power of two",f);
+ return;
+ }
+ x->overlap = (int)f;
+ cavoc_init(x,1);
+}
+
+void cavoc_winfac(t_cavoc *x, t_floatarg f)
+{
+ if(!power_of_two(f)){
+ error("%f is not a power of two",f);
+ return;
+ }
+ x->winfac = (int)f;
+ cavoc_init(x,1);
+}
+
+void cavoc_external_trigger(t_cavoc *x, t_floatarg toggle)
+{
+ x->external_trigger = toggle;
+}
+
+void cavoc_mute (t_cavoc *x, t_floatarg toggle)
+{
+ x->mute = toggle;
+}
+
+void cavoc_retune(t_cavoc *x, t_floatarg min, t_floatarg max)
+{
+ int i;
+
+ if( max <= 0 || min <= 0 || min > max ){
+ error("bad values for min and max multipliers");
+ return;
+ }
+ if( min < .1 )
+ min = 0.1;
+ if( max > 2.0 )
+ max = 2.0;
+ for( i = 0; i < x->N2 + 1; i++ ){
+ x->channel[ i * 2 + 1 ] = x->c_fundamental * (float) (i / 2) * cavoc_randf(min, max);
+ }
+
+}
+
+void cavoc_density(t_cavoc *x, t_floatarg density)
+{
+ int i;
+ if( density < 0.0001 ){
+ density = .0001;
+ } else if( density > .9999 ){
+ density = 1.0;
+ }
+ x->density = density;
+ x->start_breakpoint = 1.0 - x->density;
+ for( i = 0; i < x->N2 + 1; i++ ){
+ if( cavoc_randf(0.0, 1.0) > x->start_breakpoint ){
+ x->channel[ i * 2 ] = 1;
+ ++(x->set_count);
+ } else {
+ x->channel[ i * 2 ] = 0;
+ }
+ }
+ for( i = 0; i < x->N+2; i++ ){
+ x->last_frame[i] = x->channel[i];
+ }
+}
+
+void cavoc_hold_time(t_cavoc *x, t_floatarg f)
+{
+
+ if(f <= 0){
+ error("negative or zero hold time.");
+ return;
+ }
+ x->hold_time = f;
+ x->hold_frames = (int) ((x->hold_time/1000.0) / x->frame_duration);
+ if( x->hold_frames < 1 )
+ x->hold_frames = 1;
+ x->frames_left = x->hold_frames;
+
+}
+
+void cavoc_rule (t_cavoc *x, t_symbol *msg, short argc, t_atom *argv)
+{
+ int i;
+ short *rule = x->rule;
+ if( argc != 8 ){
+ error("the rule must be size 8");
+ return;
+ }
+
+ for( i = 0; i < 8; i++ ){
+ rule[i] = (short) atom_getfloatarg(i, argc, argv);
+// post("%d",rule[i]);
+ }
+}
+
+void cavoc_free( t_cavoc *x ){
+#if MSP
+ dsp_free((t_pxobject *) x);
+#endif
+ free(x->trigland);
+ free(x->bitshuffle);
+ free(x->Wanal);
+ free(x->Wsyn);
+ free(x->input);
+ free(x->Hwin);
+ free(x->buffer);
+ free(x->channel);
+ free(x->last_frame);
+ free(x->output);
+ free(x->c_lastphase_out);
+ free(x->rule);
+}
+
+void cavoc_assist (t_cavoc *x, void *b, long msg, long arg, char *dst)
+{
+ if (msg==1) {
+ switch (arg) {
+ case 0: sprintf(dst,"(signal) Trigger");break;
+ }
+ } else if (msg==2) {
+ switch (arg) {
+ case 0:sprintf(dst,"(signal) Output"); break;
+ }
+ }
+}
+
+void *cavoc_new(t_symbol *msg, short argc, t_atom *argv)
+{
+#if MSP
+ t_cavoc *x = (t_cavoc *)newobject(cavoc_class);
+ dsp_setup((t_pxobject *)x,1);
+ outlet_new((t_pxobject *)x, "signal");
+ #endif
+
+#if PD
+ t_cavoc *x = (t_cavoc *)pd_new(cavoc_class);
+ outlet_new(&x->x_obj, gensym("signal"));
+#endif
+
+ x->D = sys_getblksize();
+ x->R = sys_getsr();
+
+ x->density = atom_getfloatarg(0,argc,argv);
+ x->hold_time = atom_getintarg(1,argc,argv);
+ x->overlap = atom_getintarg(2,argc,argv);
+ x->winfac = atom_getintarg(3,argc,argv);
+
+
+ cavoc_init(x,0);
+ return (x);
+}
+
+void cavoc_init(t_cavoc *x,short initialized)
+{
+int i;
+
+ if(!x->D)
+ x->D = 256;
+ if(!x->R)
+ x->R = 44100;
+ if(!power_of_two(x->overlap))
+ x->overlap = 4;
+ if(!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->mult = 1. / (float) x->N;
+ x->N2 = (x->N)>>1;
+ x->Nw2 = (x->Nw)>>1;
+ x->in_count = -(x->Nw);
+ x->c_fundamental = (float) x->R/(float)((x->N2)<<1);
+ x->frame_duration = (float)x->D/(float) x->R;
+ if(x->hold_time <= 100) /* in milliseconds */
+ x->hold_time = 100;
+
+
+ cavoc_hold_time(x, x->hold_time);
+
+ if(!initialized){
+
+ srand(time(0));
+ x->mute = 0;
+ x->set_count = 0;
+ x->external_trigger = 0;
+ if( x->density < 0.0 ){
+ x->density = 0;
+ } else if( x->density > 1.0 ){
+ x->density = 1.0;
+ }
+ x->start_breakpoint = 1.0 - x->density;
+
+ x->Wanal = (float *) calloc( MAX_Nw, sizeof(float) );
+ x->Wsyn = (float *) calloc( MAX_Nw, sizeof(float) );
+ x->input = (float *) calloc( MAX_Nw, sizeof(float) );
+ x->Hwin = (float *) calloc( MAX_Nw, sizeof(float) );
+ x->buffer = (float *) calloc( MAX_N, sizeof(float) );
+ x->channel = (float *) calloc( MAX_N+2, sizeof(float) );
+ x->last_frame = (float *) calloc(MAX_N+2, sizeof(float));
+ x->output = (float *) calloc( MAX_Nw, sizeof(float) );
+ x->bitshuffle = (int *) calloc( MAX_N * 2, sizeof( int ) );
+ x->trigland = (float *) calloc( MAX_N * 2, sizeof( float ) );
+ x->c_lastphase_out = (float *) calloc( MAX_N2+1, sizeof(float) );
+
+ x->c_factor_out = TWOPI * (float) x->D / (float) x->R;
+ x->rule = (short *) calloc(8, sizeof(short));
+
+ x->rule[2] = x->rule[3] = x->rule[5] = x->rule[6] = 1;
+ x->rule[0] = x->rule[1] = x->rule[4] = x->rule[7] = 0;
+
+ }
+ memset((char *)x->input,0,x->Nw * sizeof(float));
+ memset((char *)x->output,0,x->Nw * sizeof(float));
+ memset((char *)x->buffer,0,x->N * sizeof(float));
+ memset((char *)x->c_lastphase_out,0,(x->N2+1) * sizeof(float));
+ memset((char *)x->last_frame,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);
+
+ for(i = 0; i < x->N2 + 1; i++){
+ if(cavoc_randf(0.0, 1.0) > x->start_breakpoint){
+ x->channel[ i * 2 ] = 1;
+ ++(x->set_count);
+ } else {
+ x->channel[i * 2] = 0;
+ }
+ x->channel[i * 2 + 1] = x->c_fundamental * (float) (i / 2) * cavoc_randf(.9,1.1);
+ }
+
+// post("turned on %d of a possible %d bins", x->set_count, x->N2+1 );
+
+ for( i = 0; i < x->N+2; i++ ){
+ x->last_frame[i] = x->channel[i];
+ }
+// post("cavoc~ FFT size: %d",x->N);
+}
+
+t_int *cavoc_perform(t_int *w)
+{
+ int i,j;
+ float oldfrac,newfrac;
+ t_cavoc *x = (t_cavoc *)(w[1]);
+ float *trigger_vec = (t_float *)(w[2]);
+ float *out = (t_float *)(w[3]);
+ t_int n = w[4];
+
+ int frames_left = x->frames_left;
+ float *input = x->input;
+ float *buffer = x->buffer;
+ 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 *Wanal = x->Wanal;
+ float *Wsyn = x->Wsyn;
+ float *output = x->output;
+ float *channel = x->channel;
+ float mult = x->mult ;
+ int *bitshuffle = x->bitshuffle;
+ float *trigland = x->trigland ;
+ int hold_frames = x->hold_frames;
+ short *rule = x->rule;
+ short left = x->left;
+ short right = x->right;
+ short center = x->center;
+ float *last_frame = x->last_frame;
+ float *c_lastphase_out = x->c_lastphase_out;
+ float c_fundamental = x->c_fundamental;
+ float c_factor_out = x->c_factor_out;
+ short external_trigger = x->external_trigger;
+ short new_event = 0;
+
+ in_count += D;
+
+ if( x->mute ){
+ while( n-- ){
+ *out++ = 0.0;
+ }
+ return (w+5);
+ }
+ if(external_trigger){// only accurate to within a vector because of FFT
+ for(i=0;i<n;i++){
+ if(trigger_vec[i]){
+ new_event = 1;
+ break;
+ }
+ }
+ } else if(!--frames_left){
+ frames_left = hold_frames;
+ new_event = 1;
+ }
+
+ if(new_event){
+ for( i = 2; i < N; i+=2 ){
+ left = last_frame[ i - 2];
+ center = last_frame[i] ;
+ right = last_frame[i+2];
+ channel[i] = cavoc_apply_rule(left, right, center, rule );
+ }
+ /* boundary cases */
+ center = last_frame[0];
+ right = last_frame[2];
+ left = last_frame[N];
+ channel[0] = cavoc_apply_rule(left, right, center, rule );
+
+ center = last_frame[N];
+ right = last_frame[0];
+ left = last_frame[N - 2];
+ channel[N] = cavoc_apply_rule(left, right, center, rule );
+
+
+ /* save composite frame for next time */
+ for( i = 0; i < N+1; i++ ){
+ last_frame[i] = channel[i];
+ }
+ }
+ unconvert( channel, 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.;
+
+ /* restore state variables */
+ x->in_count = in_count % Nw;
+ x->frames_left = frames_left;
+ return (w+5);
+}
+
+int cavoc_apply_rule(short left, short right, short center, short *rule){
+
+ if( ! center ){
+ if( ! left && ! right){
+ return rule[0];
+ } else if ( ! left && right ){
+ return rule[1];
+ } else if ( left && ! right ) {
+ return rule[2];
+ } else if (left && right) {
+ return rule[3];
+ }
+ } else {
+ if( ! left && ! right){
+ return rule[4];
+ } else if ( ! left && right ){
+ return rule[5];
+ } else if ( left && ! right ) {
+ return rule[6];
+ } else if (left && right) {
+ return rule[7];
+ }
+ }
+ return 0;// never happens
+}
+
+float cavoc_randf(float min, float max)
+{
+ float randv;
+
+ randv = (float) (rand() % 32768) / 32768.0 ;
+
+ return (min + ((max-min) * randv)) ;
+}
+void cavoc_dsp(t_cavoc *x, t_signal **sp, short *count)
+{
+ 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;
+ cavoc_init(x,1);
+ }
+
+ dsp_add(cavoc_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
|