Synthesizer.h

#ifndef INCLUDE_SYNTHESIZER_H
#define INCLUDE_SYNTHESIZER_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
 *
 *
 * Synthesizer.h
 *
 * Definition of class Loris::Synthesizer, a renderer of 
 * bandwidth-enhanced Partials.
 *
 * Kelly Fitz, 16 Aug 1999
 * loris@cerlsoundgroup.org
 *
 * http://www.cerlsoundgroup.org/Loris/
 *
 */

#include "Oscillator.h"
#include "PartialList.h"
#include "PartialUtils.h"

#include <vector>

//  begin namespace
namespace Loris {

// ---------------------------------------------------------------------------
//  class Synthesizer
//
//
class Synthesizer
{
//  -- public interface --
public:
//  -- construction --

    Synthesizer( double srate, std::vector<double> & buffer, double fadeTime = .001 );
    
    //  Compiler can generate copy, assign, and destroy.
    //  Synthesizer( const Synthesizer & other );
    //  ~Synthesizer( void );
    //  Synthesizer & operator= ( const Synthesizer & other );
     
//  -- synthesis --

    void synthesize( const Partial & p );   
     
    void operator() ( const Partial & p ) { synthesize( p ) ; }

     
#if ! defined(NO_TEMPLATE_MEMBERS)
    template< typename Iter >
    void synthesize( Iter begin_partials, Iter end_partials );
#else
    inline
    void synthesize( PartialList::iterator begin_partials, 
                     PartialList::iterator end_partials );  
#endif
     
#if ! defined(NO_TEMPLATE_MEMBERS)
    template< typename Iter >
    void operator() ( Iter begin_partials, Iter end_partials );
#else
    inline
    void operator() ( PartialList::iterator begin_partials, 
                      PartialList::iterator end_partials );
#endif
    
//  -- access --
    double fadeTime( void ) const;
     
    double sampleRate( void ) const;

    const std::vector<double> samples( void ) const;

    std::vector<double> samples( void );
    
//  -- mutation --

    void setFadeTime( double t );
     
//  -- implementation --
private:
    Oscillator osc;
    std::vector< double > * sampleBuffer;   //  samples are computed and stored here
    double tfade;                          // Partial fade in/out time in seconds
    double srate;                          //   sample rate in Hz
    
};  //  end of class Synthesizer


// ---------------------------------------------------------------------------
//  synthesize 
// ---------------------------------------------------------------------------
//
#if ! defined(NO_TEMPLATE_MEMBERS)
template<typename Iter>
void 
Synthesizer::synthesize( Iter begin_partials, Iter end_partials ) 
#else
inline void 
Synthesizer::synthesize( PartialList::iterator begin_partials, 
                         PartialList::iterator end_partials ) 
#endif
{ 
    //  grow the sample buffer if necessary
    typedef std::vector< double >::size_type Sz_Type;
    Sz_Type Nsamps = 1 +  
        Sz_Type( PartialUtils::timeSpan( begin_partials, end_partials ).second * srate );
    if ( sampleBuffer->size() < Nsamps )
    {
    sampleBuffer->resize( Nsamps );
   }
   
    while ( begin_partials != end_partials ) 
   {
        synthesize( *(begin_partials++) ); 
   }
}

// ---------------------------------------------------------------------------
//  operator() 
// ---------------------------------------------------------------------------
//
#if ! defined(NO_TEMPLATE_MEMBERS)
template<typename Iter>
void
Synthesizer::operator() ( Iter begin_partials, Iter end_partials ) 
#else
inline void
Synthesizer::operator() ( PartialList::iterator begin_partials, 
                          PartialList::iterator end_partials ) 
#endif
{ 
    synthesize( begin_partials, end_partials ); 
}

}   //  end of namespace Loris

#endif /* ndef INCLUDE_SYNTHESIZER_H */

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