vresampler.h

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// ----------------------------------------------------------------------------
//
//  Copyright (C) 2006-2012 Fons Adriaensen <fons@linuxaudio.org>
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation; either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
 
 
#ifndef _ZITA_VRESAMPLER_H_
#define _ZITA_VRESAMPLER_H_
 
#include "zita-resampler/zresampler_visibility.h"
#include "zita-resampler/resampler-table.h"
 
namespace ArdourZita {
 
class LIBZRESAMPLER_API VResampler
{
public:
        VResampler (void);
        ~VResampler (void);
 
        int  setup (double       ratio,
                    unsigned int nchan,
                    unsigned int hlen);
 
        int  setup (double       ratio,
                    unsigned int nchan,
                    unsigned int hlen,
                    double       frel);
 
        void   clear (void);
        int    reset (void);
        int    nchan (void) const { return _nchan; }
        int    inpsize (void) const;
        double inpdist (void) const;
        int    process (void);
 
        void set_phase (double p);
        void set_rrfilt (double t);
        void set_rratio (double r);
 
        unsigned int         inp_count;
        unsigned int         out_count;
        float               *inp_data;
        float               *out_data;
        void                *inp_list;
        void                *out_list;
 
private:
        enum { NPHASE = 256 };
 
        Resampler_table     *_table;
        unsigned int         _nchan;
        unsigned int         _inmax;
        unsigned int         _index;
        unsigned int         _nread;
        unsigned int         _nzero;
        double               _ratio;
        double               _phase;
        double               _pstep;
        double               _qstep;
        double               _wstep;
        float               *_buff;
        float               *_c1;
        float               *_c2;
        void                *_dummy [8];
};
 
};
 
#endif