diff options
Diffstat (limited to 'disarrain~.c')
| -rw-r--r-- | disarrain~.c | 810 |
1 files changed, 810 insertions, 0 deletions
diff --git a/disarrain~.c b/disarrain~.c new file mode 100644 index 0000000..d0a7ff7 --- /dev/null +++ b/disarrain~.c @@ -0,0 +1,810 @@ +#include "MSPd.h"
+#include "fftease.h"
+
+#if MSP
+void *disarrain_class;
+#endif
+
+#if PD
+static t_class *disarrain_class;
+#endif
+
+#define OBJECT_NAME "disarrain~"
+
+
+typedef struct _disarrain
+{
+#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 *last_channel;
+ float *composite_channel;
+ float *output;
+ int overlap;
+ int winfac;
+ //
+
+ int *shuffle_mapping;
+ int *last_shuffle_mapping;
+ int *shuffle_tmp; // work space for making a new distribution
+ int shuffle_count;// number of bins to swap
+ int last_shuffle_count;// ditto from last shuffle mapping
+ int max_bin;
+ //
+ float mult;
+ float *trigland;
+ int *bitshuffle;
+ //
+ void *list_outlet;
+ t_atom *list_data;
+ short mute;
+ short bypass;
+ float frame_duration; // duration in seconds of a single frame
+ float interpolation_duration; // duration in seconds of interpolation
+ int interpolation_frames; // number of frames to interpolate
+ int frame_countdown; // keep track of position in interpolation
+ int overlap_factor;// determines window size, etc.
+ float top_frequency;// for remapping spectrum
+ int perform_method;// 0 for lean, 1 for full conversion
+ // for convert
+// float *c_lastphase_in;
+// float *c_lastphase_out;
+ float c_fundamental;
+ float c_factor_in;
+ float c_factor_out;
+ // check switching algorithm
+ short lock;// lock for switching mapping arrays, but not used now
+ short force_fade; // new fadetime set regardless of situation
+ short force_switch;// binds new distribution to change of bin count
+} t_disarrain;
+
+void *disarrain_new(t_symbol *msg, short argc, t_atom *argv);
+
+t_int *disarrain_perform_lean(t_int *w);
+t_int *disarrain_perform_full(t_int *w);
+void disarrain_dsp(t_disarrain *x, t_signal **sp, short *count);
+void disarrain_assist(t_disarrain *x, void *b, long m, long a, char *s);
+void disarrain_switch_count (t_disarrain *x, t_floatarg i);
+void disarrain_topfreq (t_disarrain *x, t_floatarg freq);
+void disarrain_fadetime (t_disarrain *x, t_floatarg f);
+void reset_shuffle( t_disarrain *x );
+void disarrain_showstate( t_disarrain *x );
+void disarrain_list (t_disarrain *x, t_symbol *msg, short argc, t_atom *argv);
+void disarrain_setstate (t_disarrain *x, t_symbol *msg, short argc, t_atom *argv);
+void disarrain_isetstate (t_disarrain *x, t_symbol *msg, short argc, t_atom *argv);
+int rand_index(int max);
+void disarrain_mute(t_disarrain *x, t_floatarg toggle);
+void disarrain_bypass(t_disarrain *x, t_floatarg toggle);
+void copy_shuffle_array(t_disarrain *x);
+void interpolate_frames_to_channel(t_disarrain *x);
+void disarrain_killfade(t_disarrain *x);
+void disarrain_forcefade(t_disarrain *x, t_floatarg toggle);
+void disarrain_init(t_disarrain *x, short initialized);
+void disarrain_free(t_disarrain *x);
+void disarrain_overlap(t_disarrain *x, t_floatarg o);
+void disarrain_winfac(t_disarrain *x, t_floatarg o);
+void disarrain_fftinfo(t_disarrain *x);
+void disarrain_force_switch(t_disarrain *x, t_floatarg toggle);
+
+
+#if MSP
+void main(void)
+{
+ setup((t_messlist **)&disarrain_class, (method)disarrain_new, (method)disarrain_free,
+ (short)sizeof(t_disarrain), 0, A_GIMME, 0);
+ addmess((method)disarrain_dsp, "dsp", A_CANT, 0);
+ addint((method)disarrain_switch_count);
+ addbang((method)reset_shuffle);
+ addmess((method)disarrain_showstate,"showstate",0);
+ addmess ((method)disarrain_list, "list", A_GIMME, 0);
+ addmess ((method)disarrain_setstate, "setstate", A_GIMME, 0);
+ addmess ((method)disarrain_isetstate, "isetstate", A_GIMME, 0);
+ addmess((method)disarrain_assist,"assist",A_CANT,0);
+ addmess ((method)disarrain_mute, "mute", A_FLOAT, 0);
+ addmess ((method)disarrain_topfreq, "topfreq", A_FLOAT, 0);
+ addmess ((method)disarrain_fadetime, "fadetime", A_FLOAT, 0);
+ addmess ((method)disarrain_bypass, "bypass", A_FLOAT, 0);
+ addmess ((method)disarrain_forcefade, "forcefade", A_FLOAT, 0);
+ addmess ((method)disarrain_force_switch, "force_switch", A_FLOAT, 0);
+ addmess ((method)disarrain_switch_count, "switch_count", A_FLOAT, 0);
+ addmess ((method)disarrain_killfade, "killfade", 0);
+ addmess ((method)reset_shuffle, "reset_shuffle", 0);
+
+ addmess((method)disarrain_overlap, "overlap", A_DEFFLOAT, 0);
+ addmess((method)disarrain_winfac, "winfac", A_DEFFLOAT, 0);
+ addmess((method)disarrain_fftinfo, "fftinfo", 0);
+ dsp_initclass();
+ post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
+}
+#endif
+
+#if PD
+void disarrain_tilde_setup(void)
+{
+ disarrain_class = class_new(gensym("disarrain~"), (t_newmethod)disarrain_new,
+ (t_method)disarrain_free ,sizeof(t_disarrain), 0,A_GIMME,0);
+ CLASS_MAINSIGNALIN(disarrain_class, t_disarrain, x_f);
+ class_addmethod(disarrain_class, (t_method)disarrain_dsp, gensym("dsp"), 0);
+ class_addmethod(disarrain_class, (t_method)disarrain_showstate, gensym("showstate"), 0);
+ class_addmethod(disarrain_class, (t_method)disarrain_list, gensym("list"), A_GIMME, 0);
+ class_addmethod(disarrain_class, (t_method)disarrain_setstate, gensym("setstate"), A_GIMME, 0);
+ class_addmethod(disarrain_class, (t_method)disarrain_isetstate, gensym("isetstate"), A_GIMME, 0);
+
+ class_addmethod(disarrain_class, (t_method)disarrain_mute, gensym("mute"), A_FLOAT, 0);
+ class_addmethod(disarrain_class, (t_method)disarrain_topfreq, gensym("topfreq"), A_FLOAT, 0);
+ class_addmethod(disarrain_class, (t_method)disarrain_fadetime, gensym("fadetime"), A_FLOAT, 0);
+ class_addmethod(disarrain_class, (t_method)disarrain_bypass, gensym("bypass"), A_FLOAT, 0);
+ class_addmethod(disarrain_class, (t_method)disarrain_forcefade, gensym("forcefade"), A_FLOAT, 0);
+class_addmethod(disarrain_class, (t_method)disarrain_force_switch, gensym("force_switch"), A_FLOAT, 0);
+
+
+// class_addmethod(disarrain_class, (t_method)disarrain_killfade, gensym("reset"), A_FLOAT, 0);
+ class_addmethod(disarrain_class, (t_method)reset_shuffle, gensym("bang"), 0);
+ class_addmethod(disarrain_class, (t_method)reset_shuffle, gensym("reset_shuffle"), 0);
+ class_addmethod(disarrain_class, (t_method)disarrain_switch_count, gensym("switch_count"), A_FLOAT, 0);
+
+ class_addmethod(disarrain_class, (t_method)disarrain_overlap, gensym("overlap"), A_DEFFLOAT,0);
+ class_addmethod(disarrain_class, (t_method)disarrain_winfac, gensym("winfac"), A_DEFFLOAT,0);
+ class_addmethod(disarrain_class, (t_method)disarrain_fftinfo, gensym("fftinfo"), 0);
+ post("%s %s",OBJECT_NAME,FFTEASE_ANNOUNCEMENT);
+}
+#endif
+
+void disarrain_free(t_disarrain *x)
+{
+#if MSP
+ dsp_free((t_pxobject *) x);
+#endif
+ freebytes(x->Wanal, x->Nw * sizeof(float));
+ freebytes(x->Wsyn, x->Nw * sizeof(float));
+ freebytes(x->input, x->Nw * sizeof(float));
+ freebytes(x->Hwin, x->Nw * sizeof(float));
+ freebytes(x->buffer, x->N * sizeof(float));
+ freebytes(x->channel, (x->N+2) * sizeof(float));
+ freebytes(x->last_channel, (x->N+2) * sizeof(float));
+ freebytes(x->composite_channel, x->N+2 * sizeof(float));
+ freebytes(x->output, x->Nw * sizeof(float));
+ freebytes(x->bitshuffle, (x->N * 2) * sizeof(int));
+ freebytes(x->trigland, x->N * 2 * sizeof(float));
+ freebytes(x->shuffle_mapping, x->N2 * sizeof(int)) ;
+ freebytes(x->last_shuffle_mapping, x->N2 * sizeof(int)) ;
+ freebytes(x->shuffle_tmp, x->N2 * sizeof(int)) ;
+ freebytes(x->list_data,(x->N+2) * sizeof(t_atom)) ;
+// freebytes(x->c_lastphase_in, (x->N2+1)*sizeof(float));
+// freebytes(x->c_lastphase_out,(x->N2+1)* sizeof(float));
+}
+
+
+
+void disarrain_init(t_disarrain *x, short initialized)
+{
+ int i;
+ float curfreq;
+
+ if(!power_of_two(x->winfac)){
+ x->winfac = 1;
+ }
+ if(!power_of_two(x->overlap)){
+ x->overlap = 4;
+ }
+ x->N = x->D * x->overlap;
+ x->Nw = x->N * x->winfac;
+ limit_fftsize(&x->N,&x->Nw,OBJECT_NAME);
+ x->c_fundamental = (float) x->R/(float)( (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->N2 = (x->N)>>1;
+ x->Nw2 = (x->Nw)>>1;
+ x->inCount = -(x->Nw);
+ x->mult = 1. / (float) x->N;
+
+ x->lock = 1; // not good enough
+
+ if(initialized == 0){
+ 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_channel = (float *) calloc(MAX_N+2 , sizeof(float));
+ x->composite_channel = (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->shuffle_mapping = (int *) calloc( MAX_N2 , sizeof(int) ) ;
+ x->last_shuffle_mapping = (int *) calloc( MAX_N2 , sizeof(int) ) ;
+ x->shuffle_tmp = (int *) calloc( MAX_N2 , sizeof(int) ) ;
+ x->list_data = (t_atom *) calloc((MAX_N+2) , sizeof(t_atom) ) ;
+ x->mute = 0;
+ x->bypass = 0;
+ x->force_fade = 0;
+ x->interpolation_duration = 0.1; //seconds
+ }
+ 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->channel,0,(x->N+2) * sizeof(float));
+ memset((char *)x->last_channel,0,(x->N+2) * sizeof(float));
+
+
+ init_rdft( x->N, x->bitshuffle, x->trigland);
+ makewindows( x->Hwin, x->Wanal, x->Wsyn, x->Nw, x->N, x->D);
+
+
+ if(initialized != 2){
+ if( x->top_frequency < x->c_fundamental || x->top_frequency > 20000) {
+ x->top_frequency = 1000.0 ;
+ }
+ x->max_bin = 1;
+ curfreq = 0;
+ while( curfreq < x->top_frequency ) {
+ ++(x->max_bin);
+ curfreq += x->c_fundamental ;
+ }
+ for( i = 0; i < x->N2; i++ ) {
+ x->shuffle_mapping[i] = x->last_shuffle_mapping[i] = i*2;
+ }
+ reset_shuffle(x); // set shuffle lookup
+ copy_shuffle_array(x);// copy it to the last lookup (for interpolation)
+ x->frame_duration = (float) x->D / (float) x->R;
+ x->interpolation_frames = x->interpolation_duration / x->frame_duration;
+ x->frame_countdown = 0;
+ x->shuffle_count = 0;
+ x->last_shuffle_count = 0;
+ }
+ x->lock = 0;
+ }
+
+
+void disarrain_force_switch(t_disarrain *x, t_floatarg f)
+{
+ x->force_switch = (short)f;
+}
+
+void disarrain_fadetime (t_disarrain *x, t_floatarg f)
+{
+ int frames;
+ float duration;
+
+ // forcefade allows forcing new fadetime at any time
+ if(! x->force_fade) {
+#if MSP
+ if(!sys_getdspstate()){
+ return; // DSP is inactive
+ }
+#endif
+ if(x->frame_countdown) {
+ error("disarrain: fade in progress, fadetime reset blocked");
+ return;
+ }
+ }
+
+ duration = f * .001;
+ frames = duration / x->frame_duration;
+ if( frames <= 1){
+ error("%s: too short fade",OBJECT_NAME);
+ return;
+ }
+ x->interpolation_duration = f * .001;
+ x->interpolation_frames = frames;
+
+}
+
+void disarrain_killfade(t_disarrain *x)
+{
+ x->frame_countdown = 0;
+
+}
+
+void disarrain_topfreq (t_disarrain *x, t_floatarg freq)
+{
+ float funda = (float) x->R / (2. * (float) x->N) ;
+ float curfreq;
+
+ if( freq < funda || freq > 20000) {
+ freq = 1000.0 ;
+ }
+ x->max_bin = 1;
+ curfreq = 0;
+ while( curfreq < freq ) {
+ ++(x->max_bin);
+ curfreq += funda ;
+ }
+}
+
+void disarrain_assist (t_disarrain *x, void *b, long msg, long arg, char *dst)
+{
+ if (msg==1) {
+ switch (arg) {
+ case 0: sprintf(dst,"(signal) Input"); break;
+ }
+ } else if (msg==2) {
+ switch (arg) {
+ case 0: sprintf(dst,"(signal) Output"); break;
+ case 1: sprintf(dst,"(signal) Interpolation Sync"); break;
+ case 2: sprintf(dst,"(list) Current State"); break;
+ }
+ }
+}
+
+void *disarrain_new(t_symbol *msg, short argc, t_atom *argv)
+{
+
+#if MSP
+ t_disarrain *x = (t_disarrain *)newobject(disarrain_class);
+ x->list_outlet = listout((t_pxobject *)x);
+ dsp_setup((t_pxobject *)x,1);
+ outlet_new((t_pxobject *)x, "signal");
+ outlet_new((t_pxobject *)x, "signal");
+#endif
+
+#if PD
+ t_disarrain *x = (t_disarrain *)pd_new(disarrain_class);
+ outlet_new(&x->x_obj, gensym("signal"));
+ outlet_new(&x->x_obj, gensym("signal"));
+ x->list_outlet = outlet_new(&x->x_obj,gensym("list"));
+#endif
+
+ srand(time(0));
+
+ x->D = sys_getblksize();
+ x->R = sys_getsr();
+ x->top_frequency = atom_getfloatarg(0,argc,argv);
+ x->overlap_factor = atom_getintarg(1,argc,argv);
+ x->winfac = atom_getintarg(2,argc,argv);
+
+ disarrain_init(x,0);
+ return (x);
+}
+
+void disarrain_forcefade(t_disarrain *x, t_floatarg toggle)
+{
+ x->force_fade = (short)toggle;
+}
+
+void disarrain_mute(t_disarrain *x, t_floatarg toggle)
+{
+ x->mute = (short)toggle;
+}
+
+void disarrain_bypass(t_disarrain *x, t_floatarg toggle)
+{
+ x->bypass = (short)toggle;
+}
+
+void disarrain_overlap(t_disarrain *x, t_floatarg df)
+{
+int o = (int)df;
+ if(!power_of_two(o)){
+ error("%d is not a power of two",o);
+ return;
+ }
+ x->overlap = (int)o;
+ disarrain_init(x,1);
+}
+
+void disarrain_winfac(t_disarrain *x, t_floatarg f)
+{
+int wf = (int)f;
+ if(!power_of_two(wf)){
+ error("%f is not a power of two",wf);
+ return;
+ }
+ x->winfac = wf;
+ disarrain_init(x,2); /* calling lighter reinit routine */
+}
+
+void disarrain_fftinfo( t_disarrain *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);
+}
+
+
+// lean convert perform method
+t_int *disarrain_perform_lean(t_int *w)
+{
+ t_disarrain *x = (t_disarrain *) (w[1]);
+ t_float *in = (t_float *)(w[2]);
+ t_float *out = (t_float *)(w[3]);
+ t_float *vec_sync = (t_float *)(w[4]);
+ int n = w[5];
+ int R = x->R;
+ int Nw = x->Nw;
+ int N = x->N ;
+ int N2 = x-> N2;
+ int Nw2 = x->Nw2;
+ float *Wanal = x->Wanal;
+ float *Wsyn = x->Wsyn;
+ float *Hwin = x->Hwin;
+
+ float *input = x->input;
+ float *output = x->output;
+ float *buffer = x->buffer;
+ float *channel = x->channel;
+ float *last_channel = x->last_channel;
+ int i,j;
+ int inCount = x->inCount;
+
+ int D = x->D;
+ float tmp;
+ float ival = 0.0;
+ int *shuffle_mapping = x->shuffle_mapping;
+ int shuffle_count = x->shuffle_count;
+ int *last_shuffle_mapping = x->last_shuffle_mapping;
+ int last_shuffle_count = x->last_shuffle_count;
+ float mult = x->mult ;
+ int *bitshuffle = x->bitshuffle;
+ float *trigland = x->trigland ;
+ int frame_countdown = x->frame_countdown; // will read from variable
+ int interpolation_frames = x->interpolation_frames;
+ if( x->mute || x->lock ){
+ while( n-- ){
+ *out++ = 0.0;
+ }
+ return (w+6);
+ }
+ if( x->bypass ){
+ while( n-- ){
+ *out++ = *in++ * 0.5; // gain compensation
+ }
+ return (w+6);
+ }
+
+ 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);
+
+ leanconvert(buffer, channel, N2);
+
+ // first time for interpolation, just do last frame
+
+ if(frame_countdown == interpolation_frames){
+
+ for( i = 0, j = 0; i < last_shuffle_count ; i++, j+=2){
+ tmp = channel[j];
+ channel[j] = channel[last_shuffle_mapping[i]];
+ channel[last_shuffle_mapping[i]] = tmp;
+ }
+ --frame_countdown;
+ }
+ else if( frame_countdown > 0 ){
+ ival = (float)frame_countdown/(float)interpolation_frames;
+ // copy current frame to lastframe
+ for(j = 0; j < N; j+=2){
+ last_channel[j] = channel[j];
+ }
+ // make last frame swap
+ for(i = 0, j = 0; i < last_shuffle_count ; i++, j+=2){
+ tmp = last_channel[j];
+ last_channel[j] = last_channel[last_shuffle_mapping[i]];
+ last_channel[last_shuffle_mapping[i]] = tmp;
+
+ }
+ // make current frame swap
+ for( i = 0, j = 0; i < shuffle_count ; i++, j+=2){
+ tmp = channel[j];
+ channel[j] = channel[shuffle_mapping[i]];
+ channel[shuffle_mapping[i]] = tmp;
+
+ }
+ // now interpolate between the two
+
+ for(j = 0; j < N; j+=2){
+ channel[j] = channel[j] + ival * (last_channel[j] - channel[j]);
+ }
+
+ --frame_countdown;
+ if(frame_countdown <= 0){
+ copy_shuffle_array(x);
+ }
+ } else {
+ // otherwise straight swapping
+ for( i = 0, j = 0; i < shuffle_count ; i++, j+=2){
+ tmp = channel[j];
+ channel[j] = channel[ shuffle_mapping[i]];
+ channel[shuffle_mapping[i]] = tmp;
+ }
+ }
+ leanunconvert( channel, buffer, 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.;
+/* send out sync signal */
+ for(j = 0; j < n; j++){
+ vec_sync[j] = ival;
+ }
+ /* restore state variables */
+ x->inCount = inCount % Nw;
+ x->frame_countdown = frame_countdown;
+ return (w+6);
+}
+
+
+void interpolate_frames_to_channel(t_disarrain *x)
+{
+ float ival;
+ float tmp;
+ int i,j;
+ int frame_countdown = x->frame_countdown;
+ int interpolation_frames = x->interpolation_frames;
+ float *channel = x->channel;
+ float *last_channel = x->last_channel;
+ int *shuffle_mapping = x->shuffle_mapping;
+ int shuffle_count = x->shuffle_count;
+ int *last_shuffle_mapping = x->shuffle_mapping;
+ int last_shuffle_count = x->shuffle_count;
+ int local_max_bins;
+ int N = x->N;
+
+ ival = (float)frame_countdown/(float)interpolation_frames;
+
+// post("interpolation:%f",ival);
+ local_max_bins = (shuffle_count > last_shuffle_count)? shuffle_count : last_shuffle_count;
+ // copy channel (only amplitudes)
+ for(j = 0; j < N; j+=2){
+ last_channel[j] = channel[j];
+ }
+ // make last frame
+ for( i = 0, j = 0; i < last_shuffle_count ; i++, j+=2){
+ tmp = last_channel[j];
+ last_channel[j] = last_channel[last_shuffle_mapping[i]];
+ last_channel[last_shuffle_mapping[i]] = tmp;
+ }
+ // make current frame
+ for( i = 0, j = 0; i < shuffle_count ; i++, j+=2){
+ tmp = channel[j];
+ channel[j] = channel[shuffle_mapping[i]];
+ channel[shuffle_mapping[i]] = tmp;
+ }
+ // now interpolate between the two
+
+ for(j = 0; j < N; j+=2){
+ // channel[j] = channel[j] + ival * (last_channel[j] - channel[j]);
+
+ // or better?
+ channel[j] += ival * (last_channel[j] - channel[j]);
+ }
+}
+
+
+void disarrain_switch_count (t_disarrain *x, t_floatarg f)
+{
+int i = f;
+/*
+#if MSP
+ if(! sys_getdspstate()){
+ return; // DSP is inactive
+ }
+#endif
+*/
+ if( x->frame_countdown && !x->force_fade){
+ error("%s: fade in progress, no action taken",OBJECT_NAME);
+ return;
+ }
+ if( i < 0 ){
+ i = 0;
+ }
+ if( i > x->N2 ) {
+ i = x->N2;
+ }
+ copy_shuffle_array(x);
+ x->last_shuffle_count = x->shuffle_count;
+ x->shuffle_count = i;
+ x->frame_countdown = x->interpolation_frames; // force interpolation
+}
+
+
+void reset_shuffle (t_disarrain *x)
+{
+ int i;
+ int temp, p1, p2;
+ int max = x->max_bin;
+ int N2 = x->N2;
+
+ int *shuffle_tmp = x->shuffle_tmp;
+ int *shuffle_mapping = x->shuffle_mapping;
+
+
+ copy_shuffle_array(x);
+
+ for( i = 0; i < N2; i++ ) {
+ shuffle_tmp[i] = i;
+ }
+ // improve this algorithm
+
+ for( i = 0; i < max; i++ ) {
+ p1 = shuffle_tmp[ rand_index( max ) ];
+ p2 = shuffle_tmp[ rand_index( max ) ];
+ temp = shuffle_tmp[p1];
+ shuffle_tmp[ p1 ] = shuffle_tmp[ p2 ];
+ shuffle_tmp[ p2 ] = temp;
+ }
+
+
+
+ // now map to amplitude channels
+ for( i = 0; i < N2; i++ ) {
+ shuffle_tmp[i] *= 2;
+ }
+
+ // force interpolation
+ x->frame_countdown = x->interpolation_frames;
+
+ x->lock = 1;
+ for( i = 0; i < N2; i++ ) {
+ shuffle_mapping[i] = shuffle_tmp[i];
+ }
+
+ x->lock = 0;
+}
+
+void copy_shuffle_array(t_disarrain *x)
+{
+ int i;
+ int N2 = x->N2;
+ int *shuffle_mapping = x->shuffle_mapping;
+ int *last_shuffle_mapping = x->last_shuffle_mapping;
+
+
+ for(i = 0; i<N2; i++){
+ last_shuffle_mapping[i] = shuffle_mapping[i];
+ }
+ x->last_shuffle_count = x->shuffle_count;
+
+}
+
+int rand_index(int max) {
+
+ return (rand() % max);
+}
+
+void disarrain_dsp(t_disarrain *x, t_signal **sp, short *count)
+{
+ long i;
+
+ if(x->D != sp[0]->s_n ||x->D != sp[0]->s_n ) {
+ x->R = sp[0]->s_sr;
+ x->D = sp[0]->s_n;
+ disarrain_init(x,1);
+ }
+
+ dsp_add(disarrain_perform_lean, 5, x, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[0]->s_n);
+
+}
+
+// ENTER STORED SHUFFLE
+void disarrain_list (t_disarrain *x, t_symbol *msg, short argc, t_atom *argv) {
+ short i;
+ int ival;
+// post("list message called");
+ x->shuffle_count = argc;
+// post("list: count now %d",x->shuffle_count );
+ for (i=0; i < argc; i++) {
+ #if MSP
+ ival = argv[i].a_w.w_long;
+ #endif
+
+ #if PD
+ ival = atom_getfloatarg(i,argc,argv);
+ #endif
+ if (ival < x->N2) {
+ x->shuffle_mapping[i] = ival;
+// post("set %d to %d",i, x->shuffle_mapping[ i ]);
+ } else {
+// post ("%d out of range",ival);
+ }
+
+ }
+// post("last val is %d", x->shuffle_mapping[argc - 1]);
+ return;
+}
+
+
+void disarrain_isetstate (t_disarrain *x, t_symbol *msg, short argc, t_atom *argv) {
+ short i;
+ int ival;
+
+// x->last_shuffle_count = x->shuffle_count;
+
+ copy_shuffle_array(x);
+ x->shuffle_count = argc;
+
+
+// x->lock = 1;
+
+ for (i=0; i < argc; i++) {
+ ival = 2 * atom_getfloatarg(i,argc,argv);
+
+ if ( ival < x->N2 && ival >= 0) {
+ x->shuffle_mapping[ i ] = ival;
+ }else {
+ error("%s: %d is out of range",OBJECT_NAME, ival);
+ }
+ }
+
+// x->lock = 0;
+ x->frame_countdown = x->interpolation_frames;
+
+ return;
+}
+
+void disarrain_setstate (t_disarrain *x, t_symbol *msg, short argc, t_atom *argv) {
+ short i;
+ int ival;
+
+ x->shuffle_count = argc;
+ for (i=0; i < argc; i++) {
+ ival = 2 *atom_getfloatarg(i,argc,argv);
+
+ if ( ival < x->N2 && ival >= 0) {
+ x->shuffle_mapping[ i ] = ival;
+ } else {
+ error("%s: %d is out of range",OBJECT_NAME, ival);
+ }
+ }
+ return;
+}
+
+// REPORT CURRENT SHUFFLE STATUS
+void disarrain_showstate (t_disarrain *x ) {
+
+ t_atom *list_data = x->list_data;
+
+ short i;
+#if MSP
+ for( i = 0; i < x->shuffle_count; i++ ) {
+ SETLONG(list_data+i,x->shuffle_mapping[i]/2);
+ }
+#endif
+
+#if PD
+ for( i = 0; i < x->shuffle_count; i++ ) {
+ SETFLOAT(list_data+i,(float)x->shuffle_mapping[i]/2);
+ }
+#endif
+ outlet_list(x->list_outlet,0,x->shuffle_count,list_data);
+
+ return;
+}
+
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