Feature related types

Features, also called data whithin SPro, are stored in a structure defined as:

    typedef 		 struct { 


datakind_t kind; 		 /* feature kind 		 */ 


unsigned long dim; 		 /* vector dimension 		 */ 


unsigned long n; 		 /* number of feature vectors 		 */ 


unsigned long m; 		 /* maximum number of vectors 		 */ 


flag_t flag; 		 /* qualifiers 		 */ 


feature_t *s; 		 /* array of features 		 */ 

} data_t;  

where feature_t is a float, flag_t is a bit field of type unsigned int and the feature kind is defined as an enum of OTHER,FBANK, FBCEPSTRA, LPCEPSTRA, LPCOEFF, PARCOR and LAR.

The library also defines a feature buffer similar to what is done for waveforms, the library defines a feature buffer as

    typedef 		 struct { 


unsigned long dim; 		 /* vector dimension 		 */ 


unsigned long n; 		 /* number of feature vectors 		 */ 


unsigned long m; 		 /* maximum number of vectors 		 */ 


feature_t *s; 		 /* array of features 		 */ 

} spfbuf_t;