cannam@21: #ifndef _LIB_MFCC_H
cannam@21: #define _LIB_MFCC_H
cannam@21: 
cannam@21: #define MFCC    6
cannam@21: 
cannam@21: typedef struct mfcc_t {
cannam@21: 	
cannam@21: 	/* Filter bank parameters */
cannam@21: 	double  lowestFrequency; 
cannam@21: 	int     linearFilters; 
cannam@21: 	double  linearSpacing;
cannam@21: 	int     logFilters;
cannam@21: 	double  logSpacing;
cannam@21: 	
cannam@21: 	/* FFT length */
cannam@21: 	int     fftSize;
cannam@21: 	
cannam@21: 	/* Analysis window length*/
cannam@21: 	int     windowSize;
cannam@21: 	
cannam@21: 	int     totalFilters;
cannam@21: 	
cannam@21: 	/* Misc. */
cannam@21: 	int     samplingRate;
cannam@21: 	int     nceps;
cannam@21: 	
cannam@21: 	/* MFCC vector */
cannam@21: 	double  *ceps;
cannam@21: 	
cannam@21: 	double  **mfccDCTMatrix;
cannam@21: 	double  **mfccFilterWeights;
cannam@21: 	
cannam@21: 	/* The analysis window */
cannam@21: 	double  *window;
cannam@21: 	
cannam@21: 	/* For the FFT */
cannam@21: 	double* imagIn;		// always zero
cannam@21: 	double* realOut;
cannam@21: 	double* imagOut;
cannam@21: 	
cannam@21: 	/* Set if user want C0 */
cannam@21: 	int WANT_C0;
cannam@21: 	
cannam@21: } mfcc_t;
cannam@21: 
cannam@21: extern mfcc_t* init_mfcc(int fftSize, int nceps , int samplingRate, int WANT_C0);
cannam@21: extern int     do_mfcc(mfcc_t* mfcc_p, double* frame, int length);
cannam@21: extern void    close_mfcc(mfcc_t* mfcc_p);
cannam@21: 
cannam@21: #endif
cannam@21: