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buffet~.c
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buffet~.c
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#include "MSPd.h"
#include "fftease.h"
// adapted for Pd
#define CUSHION_FRAMES (128) // pad for grabbing
#define MAX_CHANNELS (2)
#define MAX_RMS_BUFFER (0.250)
#define MIN_RMS_BUFFER (.001)
#define MAX_EVENTS (1024)
#define MAX_RMS_FRAMES (32768)
#define OBJECT_NAME "buffet~"
static t_class *buffet_class;
typedef struct {
float *b_samples;
long b_valid;
long b_nchans;
long b_frames;
} t_guffer; // stuff we care about from garrays and buffers
typedef struct _buffet
{
t_object x_obj;
float x_f;
t_symbol *wavename; // name of waveform buffer
t_guffer *wavebuf; // holds waveform samples
t_guffer *destbuf; // for copying to another buffer
float sr; // sampling rate
short hosed; // buffers are bad
float minframes; // minimum replacement block in sample frames
float maxframes; // maximum replacement block in sample frames
long storage_maxframes; // maxframe limit that current memory can handle
float *storage; //temporary memory to store replacement block (set to maxframes * channels)
long storage_bytes; // amount of currently allocated memory
float fade; // fadein/fadeout time in sample frames
float sync; // input from groove sync signal
long swapframes; // number of frames in swap block
long r1startframe; //start frame for block 1
long r2startframe; // start frame for block 2
float dc_coef; // filter coefficient
float dc_gain; // normalization factor
short initialized; // first time or not
float *rmsbuf;// for onset analysis
float rmschunk; // store lowest rms value in buffer
void *list; // for start/end list
void *bang; // completion bang
void *floater; // outputs noise floor
t_atom *listdata;// to report est. start/stop times of events in buffer
float *analbuf; // contain overall envelope
float *onset; // contain attack times for percussive evaluations
short autoredraw; // to kill redraw if it impacts performance
} t_buffet;
void buffet_setbuf(t_buffet *x, t_symbol *wavename);
void *buffet_new(t_symbol *msg, short argc, t_atom *argv);
t_int *buffet_perform(t_int *w);
void buffet_dsp(t_buffet *x, t_signal **sp);
float buffet_boundrand(float min, float max);
void buffet_assist (t_buffet *x, void *b, long msg, long arg, char *dst);
void buffet_dsp_free(t_buffet *x);
void buffet_swap(t_buffet *x);
void buffet_specswap(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
void buffet_retroblock(t_buffet *x);
void buffet_nakedswap(t_buffet *x);
void buffet_overlap(t_buffet *x, t_floatarg f);
void buffet_minswap(t_buffet *x, t_floatarg f);
void buffet_maxswap(t_buffet *x, t_floatarg f);
void buffet_nosync_setswap(t_buffet *x);
void buffet_info(t_buffet *x);
void buffet_killdc(t_buffet *x);
void buffet_rmschunk(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
void buffet_fadein(t_buffet *x, t_floatarg f);
void buffet_fadeout(t_buffet *x, t_floatarg f);
void buffet_internal_fadein(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
void buffet_internal_fadeout(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
void buffet_dc_gain(t_buffet *x, t_floatarg f);
void buffet_dc_coef(t_buffet *x, t_floatarg f);
void buffet_normalize(t_buffet *x, t_floatarg f);
void buffet_rotatetozero(t_buffet *x, t_floatarg f);
void buffet_autoredraw(t_buffet *x, t_floatarg f);
void buffet_erase(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
void buffet_events(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
void buffet_pevents(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
void buffet_detect_onsets(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
void buffet_detect_subband_onsets(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
void buffet_copy_to_buffer(t_buffet *x, t_symbol *msg, short argc, t_atom *argv);
int buffet_setdestbuf(t_buffet *x, t_symbol *wavename);
void buffet_init(t_buffet *x, short initialized);
void buffet_reverse(t_buffet *x);
void buffet_redraw(t_buffet *x);
void buffet_redraw_named(t_buffet *x, t_symbol *arrayname);
void buffet_update(t_buffet *x);
void buffet_tilde_setup(void)
{
buffet_class = class_new(gensym("buffet~"),(t_newmethod)buffet_new,(t_method)buffet_dsp_free, sizeof(t_buffet),
0, A_GIMME,0);
CLASS_MAINSIGNALIN(buffet_class,t_buffet, x_f );
class_addmethod(buffet_class,(t_method)buffet_dsp,gensym("dsp"),A_CANT,0);
class_addmethod(buffet_class,(t_method)buffet_swap,gensym("swap"),0);
class_addmethod(buffet_class,(t_method)buffet_specswap,gensym("specswap"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_events,gensym("events"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_pevents,gensym("pevents"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_detect_onsets,gensym("detect_onsets"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_detect_subband_onsets,gensym("detect_subband_onsets"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_retroblock,gensym("retroblock"),0);
class_addmethod(buffet_class,(t_method)buffet_minswap,gensym("minswap"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_maxswap,gensym("maxswap"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_fadein,gensym("fadein"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_fadeout,gensym("fadeout"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_overlap,gensym("overlap"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_dc_gain,gensym("dc_gain"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_dc_coef,gensym("dc_coef"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_normalize,gensym("normalize"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_rotatetozero,gensym("rotatetozero"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_autoredraw,gensym("autoredraw"),A_FLOAT,0);
class_addmethod(buffet_class,(t_method)buffet_killdc,gensym("killdc"),0);
class_addmethod(buffet_class,(t_method)buffet_nakedswap,gensym("nakedswap"),0);
class_addmethod(buffet_class,(t_method)buffet_rmschunk,gensym("rmschunk"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_erase,gensym("erase"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_copy_to_buffer,gensym("copy_to_buffer"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_internal_fadein,gensym("internal_fadein"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_internal_fadeout,gensym("internal_fadeout"),A_GIMME,0);
class_addmethod(buffet_class,(t_method)buffet_setbuf,gensym("setbuf"),A_SYMBOL,0);
class_addmethod(buffet_class,(t_method)buffet_reverse,gensym("reverse"),0);
class_addmethod(buffet_class,(t_method)buffet_info,gensym("info"),0);
potpourri_announce(OBJECT_NAME);
}
void buffet_info(t_buffet *x)
{
long totalframes;
buffet_setbuf(x, x->wavename);
if( x->hosed ){
error("buffet~ needs a valid buffer");
return;
}
if( ! x->sr){
error("zero sample rate!");
return;
}
totalframes = x->wavebuf->b_frames;
post("minswap: %f, maxswap: %f", 1000. * x->minframes / x->sr, 1000. * x->maxframes / x->sr);
post("buffer size: %f", 1000. * totalframes / x->sr);
}
void buffet_overlap(t_buffet *x, t_floatarg f)
{
if( f < 0.01 ){
error("minimum fade time is 0.01 milliseconds");
return;
}
x->fade = f * .001 * x->sr;
}
void buffet_events(t_buffet *x, t_symbol *msg, short argc, t_atom *argv)
{
float *b_samples;
long b_nchans;
long b_frames;
t_atom *listdata = x->listdata;
float bufsize;
float onthresh;
float offthresh;
long bufsamps;
long aframes; // frames to analyze
float tadv;
long i,j;
float meansq;
float rmsval;
long bindex;
float ipos;
short activated = 0;
float realtime = 0.0;
int event_count = 0;
float buffer_duration;
buffet_setbuf(x, x->wavename);
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
b_frames = x->wavebuf->b_frames;
// duration in ms.
buffer_duration = 1000.0 * (float)b_frames / x->sr;
bufsize = .001 * atom_getfloatarg(0,argc,argv);
if(bufsize > MAX_RMS_BUFFER){
bufsize = MAX_RMS_BUFFER;
post("%s: setting analysis buffer to maximum: %f",OBJECT_NAME, MAX_RMS_BUFFER * 1000.0);
} else if(bufsize < MIN_RMS_BUFFER){
bufsize = MIN_RMS_BUFFER;
post("%s: setting analysis buffer to maximum: %f",OBJECT_NAME, MIN_RMS_BUFFER * 1000.0);
}
onthresh = atom_getfloatarg(1,argc,argv);
offthresh = atom_getfloatarg(2,argc,argv);
bufsamps = x->sr * bufsize;
bufsamps = bufsize * x->sr;
tadv = (float)bufsamps / x->sr;
// post("actual window size: %f",tadv);
aframes = (long) ( (float) b_frames / (float)bufsamps ) - 1;
if(aframes < 2){
error("%s: this buffer is too short to analyze",OBJECT_NAME);
return;
}
// post("analyzing %d frames",aframes);
for(i = 0; i < aframes; i++){
meansq = 0.0;
ipos = b_nchans * i * bufsamps;
/* only analyze first channel */
for(j = 0; j < bufsamps; j+= b_nchans){
bindex = ipos + j;
meansq += b_samples[bindex] * b_samples[bindex];
}
meansq /= (float) bufsamps;
rmsval = sqrt(meansq);
realtime += tadv;
if(rmsval > onthresh && ! activated) {
activated = 1;
// post("event %d starts at %f",event_count+1, realtime);
if(event_count >= MAX_EVENTS){
error("%s: exceeded maximum of %d events",OBJECT_NAME, MAX_EVENTS);
break;
}
SETFLOAT(listdata+(event_count*2), realtime * 1000.0);
}
else if( rmsval < offthresh && activated ){
activated = 0;
// post("event %d ends at %f",event_count, realtime);
SETFLOAT(listdata+((event_count*2) + 1), realtime * 1000.0);
++event_count;
}
}
if(activated){
post("%s: missed the end of the last event; setting to end of buffer",OBJECT_NAME);
SETFLOAT(listdata+((event_count*2) + 1), buffer_duration);
++event_count;
}
outlet_list(x->list, 0, event_count * 2, listdata);
}
void buffet_pevents(t_buffet *x, t_symbol *msg, short argc, t_atom *argv)
{
float *b_samples;
long b_nchans;
long b_frames;
t_atom *listdata = x->listdata;
float bufsize;
//float onthresh;
//float offthresh;
float diffthresh;
long bufsamps;
long aframes; // frames to analyze
float tadv;
//long current_frame = 0;
long i,j;
float meansq;
float rmsval;
long bindex;
float ipos;
//short activated = 0;
float realtime = 0.0;
int event_count = 0;
float buffer_duration;
float mindiff, maxdiff, absdiff,rmsdiff;
float *analbuf = x->analbuf;
float *onset = x->onset;
//float endtime;
buffet_setbuf(x, x->wavename);
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
b_frames = x->wavebuf->b_frames;
// duration in ms.
buffer_duration = 1000.0 * (float)b_frames / x->sr;
bufsize = .001 * atom_getfloatarg(0,argc,argv);
if(bufsize > MAX_RMS_BUFFER){
bufsize = MAX_RMS_BUFFER;
post("%s: setting analysis buffer to maximum: %f",OBJECT_NAME, MAX_RMS_BUFFER * 1000.0);
} else if(bufsize < MIN_RMS_BUFFER){
bufsize = MIN_RMS_BUFFER;
post("%s: setting analysis buffer to maximum: %f",OBJECT_NAME, MIN_RMS_BUFFER * 1000.0);
}
diffthresh = atom_getfloatarg(1,argc,argv);
bufsamps = x->sr * bufsize;
bufsamps = bufsize * x->sr;
tadv = (float)bufsamps / x->sr;
aframes = (long) ( (float) b_frames / (float)bufsamps );
if(aframes < 2){
error("%s: this buffer is too short to analyze",OBJECT_NAME);
return;
}
if(aframes > MAX_RMS_FRAMES){
post("too many frames: try a larger buffer size");
return;
}
analbuf[0] = 0; // for first comparison
for(i = 1; i < aframes; i++){
meansq = 0.0;
ipos = b_nchans * i * bufsamps;
/* only analyze first channel */
for(j = 0; j < bufsamps; j+= b_nchans){
bindex = ipos + j;
meansq += b_samples[bindex] * b_samples[bindex];
}
meansq /= (float) bufsamps;
analbuf[i] = rmsval = sqrt(meansq);
realtime += tadv;
}
realtime = 0;
mindiff = 9999.;
maxdiff = 0.0;
/* LPF - use elsewhere?
for(i = 1; i < aframes; i++ ){
analbuf[i] = (analbuf[i] + analbuf[i-1]) * 0.5;
}
*/
// look for big changes in direction
for(i = 1; i < aframes; i++ ){
rmsdiff = analbuf[i] - analbuf[i-1];
absdiff = fabs(rmsdiff);
if(absdiff > maxdiff)
maxdiff = absdiff;
if(absdiff < mindiff)
mindiff = absdiff;
if( rmsdiff > diffthresh ){
// new
onset[event_count] = (realtime + bufsize) * 1000.0;
if(onset[event_count] < 0)
onset[event_count] = 0;
++event_count;
// post("rt %f diff %f",realtime * 1000.0,rmsdiff);
}
realtime += tadv;
}
// post("mindiff %f maxdiff %f",mindiff,maxdiff);
if(event_count == 0){
post("%s: no events found",OBJECT_NAME);
}
for(i = 0; i < event_count; i++){
SETFLOAT(listdata + i, onset[i]);
}
outlet_list(x->list, 0, event_count, listdata);
}
void buffet_internal_fadeout(t_buffet *x, t_symbol *msg, short argc, t_atom *argv)
{
long fadeframes;
long totalframes;
int i,j,k;
float env;
float *b_samples;
long b_nchans;
long startframe;
long endframe;
if( ! x->sr){
error("zero sample rate!");
return;
}
buffet_setbuf(x, x->wavename);
if(x->hosed){
return;
}
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
totalframes = x->wavebuf->b_frames;
if(argc < 2){
post("%s: internal_fadeout requires start and end times",OBJECT_NAME);
return;
}
startframe = .001 * x->sr * atom_getfloatarg(0,argc,argv);
endframe = .001 * x->sr * atom_getfloatarg(1,argc,argv);
if(startframe < 0 || endframe > totalframes || endframe <= startframe){
error("%s: bad frame boundaries to internal_fadeout: %ld and %ld",OBJECT_NAME,startframe, endframe);
return;
}
fadeframes = endframe - startframe;
for(i = (endframe-1) * b_nchans , k = 0; k < fadeframes ; i -= b_nchans, k++ ){
env = (float) k / (float) fadeframes;
for(j = 0; j < b_nchans; j++){
b_samples[i + j] *= env;
}
}
buffet_update(x);
}
void buffet_internal_fadein(t_buffet *x, t_symbol *msg, short argc, t_atom *argv)
{
long fadeframes;
long totalframes;
int i,j,k;
float env;
float *b_samples;
long b_nchans;
long startframe;
long endframe;
if( ! x->sr){
error("zero sample rate!");
return;
}
buffet_setbuf(x, x->wavename);
if(x->hosed){
return;
}
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
totalframes = x->wavebuf->b_frames;
if(argc < 2){
post("%s: internal_fadeout requires start and end times",OBJECT_NAME);
return;
}
startframe = .001 * x->sr * atom_getfloatarg(0,argc,argv);
endframe = .001 * x->sr * atom_getfloatarg(1,argc,argv);
if(startframe < 0 || endframe > totalframes || endframe <= startframe){
error("%s: bad frame boundaries to internal_fadein: %ld and %ld",OBJECT_NAME,startframe, endframe);
return;
}
fadeframes = endframe - startframe;
for(i = startframe * b_nchans , k = 0; k < fadeframes ; i += b_nchans, k++ ){
env = (float) k / (float) fadeframes;
for(j = 0; j < b_nchans; j++){
b_samples[i + j] *= env;
}
}
buffet_update(x);
}
void buffet_reverse(t_buffet *x)
{
int i,j;
// float env;
float *b_samples;
long b_nchans;
long b_frames;
float tmpsamp;
long lenm1;
buffet_setbuf(x, x->wavename);
if(!x->wavebuf->b_valid){
return;
}
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
b_frames = x->wavebuf->b_frames;
lenm1 = (b_frames - 1) * b_nchans;
for( i = 0; i < (b_frames * b_nchans) / 2; i += b_nchans){
for(j = 0; j < b_nchans; j++){
tmpsamp = b_samples[(lenm1 - i) + j];
b_samples[(lenm1 - i) + j] = b_samples[i + j];
b_samples[i + j] = tmpsamp;
}
}
buffet_update(x);
}
void buffet_update(t_buffet *x)
{
outlet_bang(x->bang);
if(x->autoredraw){
buffet_redraw(x);
}
}
void buffet_redraw_named(t_buffet *x, t_symbol *arrayname)
{
t_garray *a;
if (!(a = (t_garray *)pd_findbyclass(arrayname, garray_class))) {
if (*arrayname->s_name) pd_error(x, "%s: %s: no such array",OBJECT_NAME, arrayname->s_name);
}
else {
garray_redraw(a);
}
}
void buffet_redraw(t_buffet *x)
{
t_garray *a;
if (!(a = (t_garray *)pd_findbyclass(x->wavename, garray_class))) {
if (*x->wavename->s_name) pd_error(x, "%s: %s: no such array",OBJECT_NAME, x->wavename->s_name);
x->wavebuf->b_valid = 0;
}
else {
garray_redraw(a);
}
}
void buffet_copy_to_buffer(t_buffet *x, t_symbol *msg, short argc, t_atom *argv)
{
t_symbol *destname;
float *b_samples;
long b_nchans;
long b_frames;
float *b_dest_samples;
long b_dest_nchans;
long b_dest_frames;
long startframe;
long endframe;
long chunkframes;
float fadein,fadeout;
int fadeframes;
// totalframes;
float env;
int i,j,k;
buffet_setbuf(x, x->wavename);
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
b_frames = x->wavebuf->b_frames;
destname = atom_getsymbolarg(0,argc,argv);
if(! buffet_setdestbuf(x, destname)){
post("%s: could not find buffer %s",OBJECT_NAME,destname->s_name);
return;
}
b_dest_samples = x->destbuf->b_samples;
b_dest_nchans = x->destbuf->b_nchans;
b_dest_frames = x->destbuf->b_frames;
startframe = atom_getfloatarg(1,argc,argv) * .001 * x->sr;
endframe = atom_getfloatarg(2,argc,argv) * .001 * x->sr;
chunkframes = endframe - startframe;
if(chunkframes <= 0){
return;
}
if(b_nchans != b_dest_nchans){
error("%s: channel mismatch with buffer %s",OBJECT_NAME, destname->s_name);
return;
}
if(b_dest_frames < chunkframes ){
// post("%s: %s is too small, truncating copy region",OBJECT_NAME, destname->s_name);
chunkframes = b_dest_frames;
}
if(startframe < 0 || endframe >= b_frames){
error("%s: bad frame range for source buffer: %ld %ld",OBJECT_NAME, startframe,endframe);
return;
}
/* first clean out destination */
memset((char *)b_dest_samples, 0, b_dest_frames * b_dest_nchans * sizeof(float));
/* now copy segment */
memcpy(b_dest_samples, b_samples + (startframe * b_nchans),
chunkframes * b_nchans * sizeof(float) );
if(argc == 5){
// post("enveloping");
fadein = atom_getfloatarg(3,argc,argv);
fadeout = atom_getfloatarg(4,argc,argv);
if(fadein > 0){
// post("fading in");
fadeframes = fadein * .001 * x->sr;
if( fadeframes > b_dest_frames){
error("%s: fadein is too long",OBJECT_NAME);
return;
}
for(i = 0 , k = 0; k < fadeframes ; i += b_dest_nchans, k++ ){
env = (float) k / (float) fadeframes;
for(j = 0; j < b_dest_nchans; j++){
b_dest_samples[i + j] *= env;
}
}
}
if(fadeout > 0){
// post("fading out");
// totalframes = chunkframes;
fadeframes = fadeout * .001 * x->sr;
startframe = chunkframes - fadeframes;
endframe = chunkframes;
// endframe = .001 * x->sr * atom_getfloatarg(1,argc,argv); // stays the same
if(startframe < 0){
error("%s: bad frame boundaries to internal_fadeout: %ld and %ld",
OBJECT_NAME,startframe, endframe);
return;
}
// fadeframes = endframe - startframe; // we already know this
for(i = (chunkframes-1) * b_dest_nchans , k = 0; k < fadeframes ; i -= b_dest_nchans, k++ ){
env = (float) k / (float) fadeframes;
for(j = 0; j < b_dest_nchans; j++){
b_dest_samples[i + j] *= env;
}
}
}
}
buffet_redraw_named(x, destname);
outlet_bang(x->bang);
}
int buffet_setdestbuf(t_buffet *x, t_symbol *wavename)
{
t_garray *a;
int b_frames;
float *b_samples;
if (!(a = (t_garray *)pd_findbyclass(wavename, garray_class))) {
if (*wavename->s_name) pd_error(x, "%s: %s: no such array",OBJECT_NAME,wavename->s_name);
x->destbuf->b_valid = 0;
}
else if (!garray_getfloatarray(a, &b_frames, &b_samples)) {
pd_error(x, "%s: bad array for %s", wavename->s_name,OBJECT_NAME);
x->destbuf->b_valid = 0;
}
else {
x->destbuf->b_valid = 1;
x->destbuf->b_frames = (long)b_frames;
x->destbuf->b_nchans = 1;
x->destbuf->b_samples = b_samples;
garray_usedindsp(a);
}
/*We added this in linux - better check that it works */
return x->destbuf->b_valid;
}
void buffet_rmschunk(t_buffet *x, t_symbol *msg, short argc, t_atom *argv)
{
float *b_samples;
long b_nchans;
long b_frames;
long bufsamps;
long i;
float meansq;
float rmsval;
long bindex;
float buffer_duration;
long startframe;
long endframe;
buffet_setbuf(x, x->wavename);
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
b_frames = x->wavebuf->b_frames;
// duration in ms.
buffer_duration = 1000.0 * (float)b_frames / x->sr;
startframe = .001 * x->sr * atom_getfloatarg(0,argc,argv);
endframe = .001 * x->sr * atom_getfloatarg(1,argc,argv);
if(startframe < 0 || startframe >= b_frames - 1){
error("%s: naughty start frame: %ld",OBJECT_NAME,startframe);
return;
}
if(endframe < 2 || endframe >= b_frames){
error("%s: naughty start frame: %ld",OBJECT_NAME,startframe);
return;
}
bufsamps = (endframe - startframe);
// post("analyzing %d samples",bufsamps);
if(!bufsamps){
// post("%s: start and end are identical!",OBJECT_NAME);
// post("instantaneous sample value [ch 1 only]: %f", b_samples[startframe*b_nchans]);
return;
}
meansq = 0.0;
for(i = startframe; i < endframe; i++){
bindex = b_nchans * i; /* only analyze first channel */
meansq += b_samples[bindex] * b_samples[bindex];
}
meansq /= (float) bufsamps;
rmsval = sqrt(meansq);
x->rmschunk = rmsval;
outlet_float(x->floater, (double)x->rmschunk);
}
void buffet_dc_gain(t_buffet *x, t_floatarg f)
{
x->dc_gain = f;
}
void buffet_dc_coef(t_buffet *x, t_floatarg f)
{
x->dc_coef = f;
}
void buffet_autoredraw(t_buffet *x, t_floatarg f)
{
x->autoredraw = (short)f;
}
void buffet_minswap(t_buffet *x, t_floatarg f)
{
if(f < 2.0 * 1000.0 * x->fade / x->sr){
error("minimum must be at least twice fade time which is %f", 1000. * x->fade / x->sr);
return;
}
x->minframes = f * .001 * x->sr;
// post("min set to %f samples",x->minframes);
}
void buffet_maxswap(t_buffet *x, t_floatarg f)
{
long oldmem;
// long framelimit;
long newframes;
newframes = f * .001 * x->sr;
if(newframes <= x->minframes){
error("max blocksize must exceed minimum blocksize, which is %f", 1000. * x->minframes/ x->sr);
}
if(newframes > x->storage_maxframes ){
// post("extending memory");
oldmem = x->storage_bytes;
// post("old memory %d", oldmem);
x->storage_maxframes = newframes;
x->storage_bytes = (x->storage_maxframes + 1) * 2 * sizeof(float);
// post("new memory %d", x->storage_bytes);
x->storage = (float *) resizebytes((char *)x->storage, oldmem, x->storage_bytes);
}
x->maxframes = newframes;
}
void buffet_erase(t_buffet *x, t_symbol *msg, short argc, t_atom *argv)
{
float *b_samples;
long b_nchans;
long b_frames;
long startframe, endframe;
//int slab;
//int offset;
int i;
if(argc < 2){
post("%s: erase requires start and end times",OBJECT_NAME);
return;
}
buffet_setbuf(x, x->wavename);
if(x->hosed){
return;
}
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
b_frames = x->wavebuf->b_frames;
startframe = .001 * x->sr * atom_getfloatarg(0,argc,argv);
endframe = .001 * x->sr * atom_getfloatarg(1,argc,argv);
if(startframe < 0){
startframe = 0;
}
if(endframe > b_frames - 1){
endframe = b_frames - 1;
}
if(startframe >= b_frames - 1){
error("%s: naughty start frame: %ld",OBJECT_NAME,startframe);
return;
}
if(endframe < 2 || endframe <= startframe){
error("%s: naughty end frame: %ld",OBJECT_NAME,endframe);
return;
}
for(i = startframe * b_nchans; i < endframe * b_nchans; i++){
b_samples[i] = 0.0;
}
buffet_update(x);
}
void buffet_rotatetozero(t_buffet *x, t_floatarg f)
{
float target = (float) f;
long shiftframes = (long) (target * 0.001 * x->sr);
float *b_samples;
long b_nchans;
long b_frames;
float *tmpmem;
buffet_setbuf(x, x->wavename);
if(x->hosed){
return;
}
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
b_frames = x->wavebuf->b_frames;
if(shiftframes <= 0 || shiftframes >= b_frames){
error("%s: shift target %f is out of range",OBJECT_NAME,target);
return;
}
tmpmem = (float *) malloc(shiftframes * b_nchans * sizeof(float));
/* copy shift block to tmp */
memcpy(tmpmem, b_samples, shiftframes * b_nchans * sizeof(float));
/* now shift the rest to the top */
memmove(b_samples, b_samples + (shiftframes * b_nchans),
(b_frames - shiftframes) * b_nchans * sizeof(float));
/* finally copy tmp to the tail */
memcpy(b_samples + (b_frames - shiftframes) * b_nchans,tmpmem,
shiftframes * b_nchans * sizeof(float ));
free(tmpmem);
buffet_update(x);
}
void buffet_normalize(t_buffet *x, t_floatarg f)
{
float target = (float) f;
float *b_samples;
long b_nchans;
long b_frames;
long i;
float maxamp = 0.0;
float amptest;
float rescale;
if(target <= 0.0){
error("%s: normalize target %f is too low",OBJECT_NAME,target);
return;
}
buffet_setbuf(x, x->wavename);
if(x->hosed){
return;
}
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
b_frames = x->wavebuf->b_frames;
for(i = 0; i < b_frames * b_nchans; i++){
amptest = fabs(b_samples[i]);
if(maxamp < amptest)
maxamp = amptest;
}
if(maxamp < .000000001){
post("%s: amplitude zero or too low to normalize in \"%s\"",OBJECT_NAME,x->wavename->s_name);
return;
}
rescale = target / maxamp;
if(rescale > .99 && rescale < 1.01){
post("%s: \"%s\" already normalized to %f",OBJECT_NAME,x->wavename->s_name,target);
}
else {
for(i = 0; i < b_frames * b_nchans; i++){
b_samples[i] *= rescale;
}
}
buffet_update(x);
}
void buffet_fadein(t_buffet *x, t_floatarg f)
{
long fadeframes;
long totalframes;
int i,j,k;
float env;
float *b_samples;
long b_nchans;
if( ! x->sr){
error("zero sample rate!");
return;
}
fadeframes = f * .001 * x->sr;
//post("fading in %d frames",fadeframes);
buffet_setbuf(x, x->wavename);
if(x->hosed){
return;
}
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
totalframes = x->wavebuf->b_frames;
if( fadeframes > totalframes){
error("fadein is too long");
return;
}
for(i = 0, k = 0;i < fadeframes * b_nchans; i += b_nchans, k++ ){
env = (float) k / (float) fadeframes;
for(j = 0; j < b_nchans; j++){
b_samples[i + j] *= env;
}
}
buffet_update(x);
}
void buffet_fadeout(t_buffet *x, t_floatarg f)
{
long fadeframes;
long totalframes;
int i,j,k;
float env;
float *b_samples;
long b_nchans;
if( ! x->sr){
error("zero sample rate!");
return;
}
fadeframes = f * .001 * x->sr;
buffet_setbuf(x, x->wavename);
if(x->hosed){
return;
}
b_samples = x->wavebuf->b_samples;
b_nchans = x->wavebuf->b_nchans;
totalframes = x->wavebuf->b_frames;
if( fadeframes > totalframes){
error("%s: fadein is too long",OBJECT_NAME);
return;
}
for(i = (totalframes-1) * b_nchans , k = 0; k < fadeframes ; i -= b_nchans, k++ ){
env = (float) k / (float) fadeframes;
for(j = 0; j < b_nchans; j++){
b_samples[i + j] *= env;
}
}