view examples/puredata/lpcc-test.pd @ 214:f28f66faa016

Add "stateful" feature type with initial feature "last n"

Stateful feature extraction functions are functions that require state to be maintained between successive calls.  This is necessary, for example when an accumulation of values is required, or changes need to be measured over time.

The initial xtract_last_n() function accumulates the last N (single) values from *data and writes them to *result

#N canvas 356 233 722 300 10;
#X obj 160 170 xtract~ autocorrelation;
#N canvas 0 0 450 300 graph1 0;
#X array lpcc 16 float 5;
#A 0 0 0 -0.827113 -0.827113 -0.827113 -0.485055 0.314974 0.657032
0.810476 0.396513 0.0440753 -0.630112 -0.9456 -0.887411 -1.12995 0.596854
;
#X coords 0 16 15 -16 200 140 1;
#X restore 458 97 graph;
#X obj 149 34 noise~;
#N canvas 9 103 450 300 lpc 0;
#X obj 323 25 block~ 32;
#X obj 140 52 inlet~;
#X obj 140 113 xtract~ lpc;
#N canvas 237 125 450 300 lpcc 0;
#X obj 26 130 xtract~ lpcc;
#N canvas 0 0 450 300 graph1 0;
#X array lpc 16 float 5;
#A 0 -1.03207 -1.03207 -1.03207 -21.8757 -21.8757 -21.8757 -21.8757
-0.391539 -0.391539 -0.391539 -0.391539 0.448536 0.448536 0.448536
0.448536 0.516603;
#X coords 0 16 15 -16 200 140 1;
#X restore 219 37 graph;
#X obj 23 12 block~ 16;
#X obj 26 51 tabreceive~ lpc;
#X msg 95 107 list 16;
#X obj 24 196 tabsend~ lpcc;
#X obj 95 85 loadbang;
#X connect 0 0 5 0;
#X connect 3 0 0 0;
#X connect 4 0 0 1;
#X connect 6 0 4 0;
#X restore 298 172 pd lpcc;
#X obj 137 220 tabsend~ lpc;
#X obj 139 152 a_blockswap~ 32;
#X connect 1 0 2 0;
#X connect 2 0 5 0;
#X connect 5 0 4 0;
#X restore 160 218 pd lpc;
#X obj 31 52 a_hann 16;
#X obj 31 25 loadbang;
#X obj 98 23 bng 15 250 50 0 empty empty empty 0 -6 0 10 -262144 -1
-1;
#X obj 156 139 *~;
#X obj 27 -41 block~ 16 4;
#X obj 265 81 *~ 0.4;
#X obj 148 87 *~ 0.1;
#X obj 266 46 osc~ 1000;
#X connect 0 0 3 0;
#X connect 2 0 10 0;
#X connect 4 0 7 0;
#X connect 5 0 4 0;
#X connect 6 0 4 0;
#X connect 7 0 0 0;
#X connect 9 0 7 1;
#X connect 10 0 7 1;
#X connect 11 0 9 0;