RateTransposer.h

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//
// Last changed  : $Date: 2004-11-13 17:29:45 -0500 (Sat, 13 Nov 2004) $
// File revision : $Revision: 4714 $
//
// $Id: RateTransposer.h 4714 2004-11-13 22:29:45Z ijr $
//
//
// License :
//
//  SoundTouch audio processing library
//  Copyright (c) Olli Parviainen
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  This library 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
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#ifndef RateTransposer_H
#define RateTransposer_H

#include "AAFilter.h"
#include "FIFOSamplePipe.h"
#include "FIFOSampleBuffer.h"

#include "STTypes.h"

namespace soundtouch
{

class RateTransposer : public FIFOProcessor
{
protected:
    AAFilter *pAAFilter;

    float fRate;

    uint uChannels;

    FIFOSampleBuffer storeBuffer;

    FIFOSampleBuffer tempBuffer;

    FIFOSampleBuffer outputBuffer;

    BOOL bUseAAFilter;

    void init();

    virtual void resetRegisters() = 0;

    virtual uint transposeStereo(soundtouch::SAMPLETYPE *dest, 
                         const soundtouch::SAMPLETYPE *src, 
                         uint numSamples) = 0;
    virtual uint transposeMono(soundtouch::SAMPLETYPE *dest, 
                       const soundtouch::SAMPLETYPE *src, 
                       uint numSamples) = 0;
    uint transpose(soundtouch::SAMPLETYPE *dest, 
                   const soundtouch::SAMPLETYPE *src, 
                   uint numSamples);

    void flushStoreBuffer();

    void downsample(const soundtouch::SAMPLETYPE *src, 
                    uint numSamples);
    void upsample(const soundtouch::SAMPLETYPE *src, 
                 uint numSamples);

    void processSamples(const soundtouch::SAMPLETYPE *src, 
                        uint numSamples);


public:
    RateTransposer();
    virtual ~RateTransposer();

    void *operator new(size_t s);

    static RateTransposer *newInstance();

    FIFOSamplePipe *getOutput() { return &outputBuffer; };

    FIFOSamplePipe *getStore() { return &storeBuffer; };

    AAFilter *getAAFilter() const;

    void enableAAFilter(BOOL newMode);

    BOOL isAAFilterEnabled() const;

    virtual void setRate(float newRate);

    void setChannels(uint channels);

    void putSamples(const soundtouch::SAMPLETYPE *samples, uint numSamples);

    void clear();

    uint isEmpty();
};

}

#endif

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