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/usr/include/zita-resampler/resampler-table.h is in libzita-resampler-dev 1.6.0-2.

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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 __RESAMPLER_TABLE_H
#define __RESAMPLER_TABLE_H


#include <pthread.h>


#define ZITA_RESAMPLER_MAJOR_VERSION 1
#define ZITA_RESAMPLER_MINOR_VERSION 6


extern int zita_resampler_major_version (void);
extern int zita_resampler_minor_version (void);


class Resampler_mutex
{
private:

    friend class Resampler_table;

    Resampler_mutex (void) { pthread_mutex_init (&_mutex, 0); }
    ~Resampler_mutex (void) { pthread_mutex_destroy (&_mutex); }
    void lock (void) { pthread_mutex_lock (&_mutex); }
    void unlock (void) { pthread_mutex_unlock (&_mutex); }

    pthread_mutex_t  _mutex;
};


class Resampler_table
{
public:

    static void print_list (void);

private:

    Resampler_table (double fr, unsigned int hl, unsigned int np);
    ~Resampler_table (void);

    friend class Resampler;
    friend class VResampler;

    Resampler_table     *_next;
    unsigned int         _refc;
    float               *_ctab;
    double               _fr;
    unsigned int         _hl;
    unsigned int         _np;

    static Resampler_table *create (double fr, unsigned int hl, unsigned int np);
    static void destroy (Resampler_table *T);

    static Resampler_table  *_list;
    static Resampler_mutex   _mutex;
};


#endif