FourierTransform.h

#ifndef INCLUDE_FOURIERTRANSFORM_H
#define INCLUDE_FOURIERTRANSFORM_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) 1999-2004 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
 *
 *
 * FourierTransform.h
 *
 * Definition of class Loris::FourierTransform, support for the
 * FFTW library (www.fftw.org). Requires a compiled fttw library.
 *
 * Kelly Fitz, 15 Feb 2000
 * loris@cerlsoundgroup.org
 *
 * http://www.cerlsoundgroup.org/Loris/
 *
 */
#include <complex>
#include <vector>

//  begin namespace
namespace Loris {

class FTimpl;

// ---------------------------------------------------------------------------
//  class FourierTransform
//
//
class FourierTransform 
{
//  -- public interface --
public:
   
   typedef std::vector< std::complex< double > >::size_type size_type;

    typedef std::vector< std::complex< double > >::iterator iterator;

    typedef std::vector< std::complex< double > >::const_iterator const_iterator;

//  --- lifecycle ---

    FourierTransform( size_type len );
    
    FourierTransform( const FourierTransform & rhs );
    
    ~FourierTransform( void );  

//  --- operators ---
        
    FourierTransform & operator= ( const FourierTransform & rhs );
    

//  --- access/mutation ---

    std::complex< double > & operator[] ( size_type index )
    { 
       return _buffer[ index ]; 
    }

    const std::complex< double > & operator[] ( size_type index ) const
    { 
       return _buffer[ index ]; 
    }

    iterator begin( void )  
    { 
       return _buffer.begin(); 
    }
    
    iterator end( void )    
    { 
       return _buffer.end(); 
    }

    const_iterator begin( void ) const  
    { 
       return _buffer.begin(); 
    }
    
    const_iterator end( void ) const    
    { 
       return _buffer.end(); 
    }

//  --- operations ---
        
    void transform( void );

//  --- inquiry ---

    size_type size( void ) const ;
                
//  -- instance variables --
private:

    std::vector< std::complex< double > > _buffer;

    // insulating implementation instance (defined in 
    // FourierTransform.C), conceals interface to FFTW
    FTimpl * _impl;
    
};  //  end of class FourierTransform


}   //  end of namespace Loris

#endif /* ndef INCLUDE_FOURIERTRANSFORM_H */

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