jack2/common/JackResampler.h

/*
Copyright (C) 2008 Grame

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 __JackResampler__
#define __JackResampler__

#include "ringbuffer.h"
#include "JackError.h"

namespace Jack
{

#define DEFAULT_RB_SIZE 16384 * 2	

/*!
\brief Base class for Resampler.
*/

class JackResampler
{

    protected:
    
        jack_ringbuffer_t* fRingBuffer;
        unsigned int fNum;
        unsigned int fDenom;
           
    public:
    
        JackResampler();
        virtual ~JackResampler();
        
        virtual void Reset();
        
        virtual unsigned int ReadResample(float* buffer, unsigned int frames);
        virtual unsigned int WriteResample(float* buffer, unsigned int frames);
        
        virtual unsigned int Read(float* buffer, unsigned int frames);
        virtual unsigned int Write(float* buffer, unsigned int frames);
        
        virtual unsigned int ReadSpace();
        virtual unsigned int WriteSpace();

        virtual void SetRatio(unsigned int num, unsigned int denom)
        {
            fNum = num;
            fDenom = denom;
        }
        virtual void GetRatio(unsigned int& num, unsigned int& denom)
        {
            num = fNum;
            denom = fDenom;
        }
 
    };
}

#endif