resampler.h

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// ----------------------------------------------------------------------------
//
//  Copyright (C) 2006-2023 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 __RESAMPLER_H
#define __RESAMPLER_H
 
 
#include "resampler-table.h"
 
 
class Resampler
{
public:
 
    Resampler (void) noexcept;
    ~Resampler (void);
 
    bool setup (unsigned int fs_inp,
                unsigned int fs_out,
                unsigned int nchan,
                unsigned int hlen);
 
    bool setup (unsigned int fs_inp,
                unsigned int fs_out,
                unsigned int nchan,
                unsigned int hlen,
                double       frel);
 
    void   clear (void);
    bool   reset (void) noexcept;
    int    nchan (void) const noexcept { return _nchan; }
    int    filtlen (void) const noexcept { return inpsize (); } // Deprecated
    int    inpsize (void) const noexcept;
    double inpdist (void) const noexcept;
    bool    process (void);
 
    unsigned int         inp_count;
    unsigned int         out_count;
    float               *inp_data;
    float               *out_data;
    float              **inp_list;
    float              **out_list;
 
private:
 
    Resampler_table     *_table;
    unsigned int         _nchan;
    unsigned int         _inmax;
    unsigned int         _index;
    unsigned int         _nread;
    unsigned int         _nzero;
    unsigned int         _phase;
    unsigned int         _pstep;
    float               *_buff;
    void                *_dummy [8];
};
 
 
#endif