Carla/source/modules/zita-resampler/resampler.h

// ----------------------------------------------------------------------------
//
//  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 __RESAMPLER_H
#define __RESAMPLER_H


#include "resampler-table.h"


class Resampler
{
public:

    Resampler (void) noexcept;
    ~Resampler (void);

    int  setup (unsigned int fs_inp,
                unsigned int fs_out,
                unsigned int nchan,
                unsigned int hlen);

    int  setup (unsigned int fs_inp,
                unsigned int fs_out,
                unsigned int nchan,
                unsigned int hlen,
                double       frel);

    void         clear (void);
    bool         reset (void) noexcept;
    unsigned int nchan (void) const noexcept { return _nchan; }
    unsigned int filtlen (void) const noexcept { return inpsize (); } // Deprecated
    unsigned 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;
    void                *inp_list;
    void                *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;
};


#endif