cannam@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@0: 
cannam@0: /*
cannam@0:     QM DSP Library
cannam@0: 
cannam@0:     Centre for Digital Music, Queen Mary, University of London.
Chris@84:     This file 2005-2006 Christian Landone.
Chris@84: 
Chris@84:     This program is free software; you can redistribute it and/or
Chris@84:     modify it under the terms of the GNU General Public License as
Chris@84:     published by the Free Software Foundation; either version 2 of the
Chris@84:     License, or (at your option) any later version.  See the file
Chris@84:     COPYING included with this distribution for more information.
cannam@0: */
cannam@0: 
cannam@0: #ifndef FILTFILT_H
cannam@0: #define FILTFILT_H
cannam@0: 
cannam@0: #include "Filter.h"
cannam@0: 
Chris@153: /**
Chris@153:  * Zero-phase digital filter, implemented by processing the data
Chris@153:  * through a filter specified by the given FilterConfig structure (see
Chris@153:  * Filter) and then processing it again in reverse.
Chris@153:  */
cannam@0: class FiltFilt  
cannam@0: {
cannam@0: public:
Chris@153:     FiltFilt( FilterConfig Config );
cannam@0:     virtual ~FiltFilt();
cannam@0: 
cannam@0:     void reset();
cannam@0:     void process( double* src, double* dst, unsigned int length );
cannam@0: 
cannam@0: private:
Chris@153:     void initialise( FilterConfig Config );
cannam@0:     void deInitialise();
cannam@0: 
cannam@0:     unsigned int m_ord;
cannam@0: 
cannam@0:     Filter* m_filter;
cannam@0: 
cannam@0:     double* m_filtScratchIn;
cannam@0:     double* m_filtScratchOut;
cannam@0: 
cannam@0:     FilterConfig m_filterConfig;
cannam@0: };
cannam@0: 
cannam@0: #endif