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stcorrdsp.h

/*
    Copyright (C) 2008 Fons Adriaensen <fons@kokkinizita.net>
    
    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 2 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/


#ifndef __STCORRDSP_H
#define     __STCORRDSP_H


class Stcorrdsp
{
public:

    Stcorrdsp (void);
    ~Stcorrdsp (void);

    void process (float *pl, float *pr, int n);  
    float read (void);

    static void init (int fsamp, float flp, float tcf); 

private:

    float          _zl;          // filter states
    float          _zr;
    float          _zlr;
    float          _zll;
    float          _zrr;

    static float   _w1;          // lowpass filter coefficient
    static float   _w2;          // correlation filter coeffient
};


#endif

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