view examples/MSP/test/magspec @ 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

max v2;
#N vpatcher 762 88 1362 488;
#P window setfont "Sans Serif" 9.;
#N out 1;
#P newobj 219 220 33 196617 out 1;
#N in 2;
#P newobj 316 36 25 196617 in 2;
#N in 1;
#P newobj 218 44 25 196617 in 1;
#P newex 218 112 108 196617 wave~ mags 0. 11.61;
#P newex 218 77 101 196617 phasor~ 86.133003;
#P newex 53 119 100 196617 buffer~ mags 11.62;
#P newex 218 146 134 196617 xtract~ irregularity_k 512;
#P connect 4 0 2 0;
#P connect 2 0 3 0;
#P connect 3 0 0 0;
#P connect 0 0 6 0;
#P connect 5 0 3 2;
#P pop;