c@225: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
c@225: 
c@225: /*
c@225:     QM DSP Library
c@225: 
c@225:     Centre for Digital Music, Queen Mary, University of London.
c@309:     This file 2005-2006 Christian Landone.
c@309: 
mathieu@321:     Modifications:
mathieu@321: 
mathieu@321:     - delta threshold
mathieu@321:     Description: add delta threshold used as offset in the smoothed
mathieu@321:     detection function
mathieu@321:     Author: Mathieu Barthet
mathieu@321:     Date: June 2010
mathieu@321: 
c@309:     This program is free software; you can redistribute it and/or
c@309:     modify it under the terms of the GNU General Public License as
c@309:     published by the Free Software Foundation; either version 2 of the
c@309:     License, or (at your option) any later version.  See the file
c@309:     COPYING included with this distribution for more information.
c@225: */
c@225: 
cannam@489: #ifndef QM_DSP_DFPROCESS_H
cannam@489: #define QM_DSP_DFPROCESS_H
c@225: 
c@225: #include "FiltFilt.h"
c@225: 
cannam@503: #include <stdio.h>
cannam@503: 
cannam@503: struct DFProcConfig
cannam@503: {
cannam@503:     int length; 
cannam@503:     int LPOrd; 
c@225:     double *LPACoeffs; 
c@225:     double *LPBCoeffs; 
cannam@503:     int winPre;
cannam@503:     int winPost; 
c@225:     double AlphaNormParam;
c@237:     bool isMedianPositive;
c@410:     float delta; //delta threshold used as an offset when computing the smoothed detection function
c@410: 
c@410:     DFProcConfig() :
c@410:         length(0),
c@410:         LPOrd(0),
c@410:         LPACoeffs(NULL),
c@410:         LPBCoeffs(NULL),
c@410:         winPre(0),
c@410:         winPost(0),
c@410:         AlphaNormParam(0),
c@410:         isMedianPositive(false),
c@410:         delta(0)
c@410:     {
c@410:     }
c@237: };
c@225: 
c@225: class DFProcess  
c@225: {
c@225: public:
c@225:     DFProcess( DFProcConfig Config );
c@225:     virtual ~DFProcess();
c@225: 
c@225:     void process( double* src, double* dst );
cannam@483:         
c@225: private:
c@225:     void initialise( DFProcConfig Config );
c@225:     void deInitialise();
c@225:     void removeDCNormalize( double *src, double*dst );
c@225:     void medianFilter( double* src, double* dst );
c@225: 
c@299:     int m_length;
c@299:     int m_FFOrd;
c@225: 
c@299:     int m_winPre;
c@299:     int m_winPost;
c@225: 
c@225:     double m_alphaNormParam;
c@225: 
c@225:     double* filtSrc;
c@225:     double* filtDst;
c@225: 
c@225:     double* m_filtScratchIn;
c@225:     double* m_filtScratchOut;
c@225: 
c@225:     FiltFilt* m_FiltFilt;
c@225: 
c@225:     bool m_isMedianPositive;
c@410:     float m_delta; //add delta threshold
c@225: };
c@225: 
c@225: #endif