Channelizer.h

#ifndef INCLUDE_CHANNELIZER_H
#define INCLUDE_CHANNELIZER_H
/*
 * This is the Loris C++ Class Library, implementing analysis, 
 * manipulation, and synthesis of digitized sounds using the Reassigned 
 * Bandwidth-Enhanced Additive Sound Model.
 *
 * Loris is Copyright (c) 1999-2007 by Kelly Fitz and Lippold Haken
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *
 * Channelizer.h
 *
 * Definition of class Loris::Channelizer.
 *
 * Kelly Fitz, 21 July 2000
 * loris@cerlsoundgroup.org
 *
 * http://www.cerlsoundgroup.org/Loris/
 *
 */

#if defined(NO_TEMPLATE_MEMBERS)
#include "PartialList.h"
#endif

#include <memory>

//  begin namespace
namespace Loris {

class Envelope;
class Partial;

// ---------------------------------------------------------------------------
//  Channelizer
//  
//
class Channelizer
{
//  -- implementaion --
    std::auto_ptr< Envelope > _refChannelFreq;  
    
    int _refChannelLabel;                       

                                                
    double _stretchFactor;                      





    double _ampWeighting;                       




    
//  -- public interface --
public:
//  -- construction --

    Channelizer( const Envelope & refChanFreq, int refChanLabel, double stretchFactor = 0 );
     
    Channelizer( double refFreq, double stretchFactor = 0 );
         
    Channelizer( const Channelizer & other );
     
    Channelizer & operator=( const Channelizer & rhs );
     
    ~Channelizer( void );
     
//  -- channelizing --

    void channelize( Partial & partial ) const;

#if ! defined(NO_TEMPLATE_MEMBERS)
    template<typename Iter>
    void channelize( Iter begin, Iter end ) const;
#else
    void channelize( PartialList::iterator begin, PartialList::iterator end ) const;
#endif   

#if ! defined(NO_TEMPLATE_MEMBERS)
    template<typename Iter>
    void operator() ( Iter begin, Iter end ) const
#else
    inline
    void operator() ( PartialList::iterator begin, PartialList::iterator end ) const
#endif
         { channelize( begin, end ); }
         
    double channelFrequencyAt( double time, int channel ) const;

    int computeChannelNumber( double time, double frequency ) const;
    
    double computeFractionalChannelNumber( double time, double frequency ) const;
    
    
    double referenceFrequencyAt( double time ) const;

//  -- access/mutation --
         
    double amplitudeWeighting( void ) const;

    void setAmplitudeWeighting( double expon );

    double stretchFactor( void ) const;
        
    void setStretchFactor( double stretch );    
         
    void setStretchFactor( double fm, int m, double fn, int n );
    
// -- static members --

#if ! defined(NO_TEMPLATE_MEMBERS)
    template< typename Iter >
    static 
    void channelize( Iter begin, Iter end, 
                     const Envelope & refChanFreq, int refChanLabel );
#else
    static inline 
    void channelize( PartialList::iterator begin, PartialList::iterator end,
                     const Envelope & refChanFreq, int refChanLabel );
#endif   
     
    static double computeStretchFactor( double fm, int m, double fn, int n );
     
    static double computeStretchFactor( double fref, double fn, double n );
    
};  //  end of class Channelizer

// ---------------------------------------------------------------------------
//  channelize (sequence of Partials)
// ---------------------------------------------------------------------------
//
#if ! defined(NO_TEMPLATE_MEMBERS)
template<typename Iter>
void Channelizer::channelize( Iter begin, Iter end ) const
#else
inline
void Channelizer::channelize( PartialList::iterator begin, PartialList::iterator end ) const
#endif
{
    while ( begin != end )
    {
        channelize( *begin++ );
    }
}

// ---------------------------------------------------------------------------
//  channelize (static)
// ---------------------------------------------------------------------------
//
#if ! defined(NO_TEMPLATE_MEMBERS)
template< typename Iter >
void Channelizer::channelize( Iter begin, Iter end, 
                              const Envelope & refChanFreq, int refChanLabel )
#else
inline
void Channelizer::channelize( PartialList::iterator begin, PartialList::iterator end,
                              const Envelope & refChanFreq, int refChanLabel )
#endif   
{
   Channelizer instance( refChanFreq, refChanLabel );
    while ( begin != end )
    {
        instance.channelize( *begin++ );
    }
}

}   //  end of namespace Loris

#endif /* ndef INCLUDE_CHANNELIZER_H */

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