c@251: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
c@250: 
c@251: /*
c@251:     QM DSP Library
c@250: 
c@251:     Centre for Digital Music, Queen Mary, University of London.
c@251:     This file copyright 2005 Nicolas Chetry, copyright 2008 QMUL.
c@251:     All rights reserved.
c@251: */
c@250: 
c@251: #ifndef MFCC_H
c@251: #define MFCC_H
c@251: 
c@251: #include "base/Window.h"
c@251: 
c@251: struct MFCCConfig {
c@251:     int FS;
c@251:     int fftsize;
c@251:     int nceps;
c@251:     bool want_c0;
c@251: };
c@251: 
c@251: class MFCC
c@251: {
c@251: public:
c@251:     MFCC(MFCCConfig config);
c@251:     virtual ~MFCC();
c@251: 
c@251:     int process(int length, double *inframe, double *outceps);
c@251: 
c@251:     int getfftlength() const { return fftSize; }
c@251: 
c@251: private:
c@251:     /* Filter bank parameters */
c@251:     double  lowestFrequency; 
c@251:     int     linearFilters; 
c@251:     double  linearSpacing;
c@251:     int     logFilters;
c@251:     double  logSpacing;
c@251:     
c@251:     /* FFT length */
c@251:     int     fftSize;
c@251:     
c@251:     int     totalFilters;
c@251:     
c@251:     /* Misc. */
c@251:     int     samplingRate;
c@251:     int     nceps;
c@251:     
c@251:     /* MFCC vector */
c@251:     double  *ceps;
c@251:     
c@251:     double  **mfccDCTMatrix;
c@251:     double  **mfccFilterWeights;
c@251:     
c@251:     /* The analysis window */
c@251:     Window<double> *window;
c@251:     
c@251:     /* For the FFT */
c@251:     double* imagIn;		// always zero
c@251:     double* realOut;
c@251:     double* imagOut;
c@251:     
c@251:     /* Set if user want C0 */
c@251:     int WANT_C0;
c@251: };
c@251: 
c@250: 
c@250: #endif
c@250: