cannam@26: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@25: 
cannam@26: /*
cannam@26:     QM DSP Library
cannam@25: 
cannam@26:     Centre for Digital Music, Queen Mary, University of London.
cannam@26:     This file copyright 2005 Nicolas Chetry, copyright 2008 QMUL.
cannam@26:     All rights reserved.
cannam@26: */
cannam@25: 
cannam@26: #ifndef MFCC_H
cannam@26: #define MFCC_H
cannam@26: 
cannam@26: #include "base/Window.h"
cannam@26: 
cannam@26: struct MFCCConfig {
cannam@26:     int FS;
cannam@26:     int fftsize;
cannam@26:     int nceps;
cannam@26:     bool want_c0;
cannam@26: };
cannam@26: 
cannam@26: class MFCC
cannam@26: {
cannam@26: public:
cannam@26:     MFCC(MFCCConfig config);
cannam@26:     virtual ~MFCC();
cannam@26: 
cannam@26:     int process(int length, double *inframe, double *outceps);
cannam@26: 
cannam@26:     int getfftlength() const { return fftSize; }
cannam@26: 
cannam@26: private:
cannam@26:     /* Filter bank parameters */
cannam@26:     double  lowestFrequency; 
cannam@26:     int     linearFilters; 
cannam@26:     double  linearSpacing;
cannam@26:     int     logFilters;
cannam@26:     double  logSpacing;
cannam@26:     
cannam@26:     /* FFT length */
cannam@26:     int     fftSize;
cannam@26:     
cannam@26:     int     totalFilters;
cannam@26:     
cannam@26:     /* Misc. */
cannam@26:     int     samplingRate;
cannam@26:     int     nceps;
cannam@26:     
cannam@26:     /* MFCC vector */
cannam@26:     double  *ceps;
cannam@26:     
cannam@26:     double  **mfccDCTMatrix;
cannam@26:     double  **mfccFilterWeights;
cannam@26:     
cannam@26:     /* The analysis window */
cannam@26:     Window<double> *window;
cannam@26:     
cannam@26:     /* For the FFT */
cannam@26:     double* imagIn;		// always zero
cannam@26:     double* realOut;
cannam@26:     double* imagOut;
cannam@26:     
cannam@26:     /* Set if user want C0 */
cannam@26:     int WANT_C0;
cannam@26: };
cannam@26: 
cannam@25: 
cannam@25: #endif
cannam@25: