timequant.hpp

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/*
  TIMEQUANT.hpp  -  quantised (grid aligned) time values
 
   Copyright (C)
     2010,            Hermann Vosseler <Ichthyostega@web.de>
 
 **Lumiera** 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. See the file COPYING for further details.
 
*/
 
 
#ifndef LIB_TIME_TIMEQUANT_H
#define LIB_TIME_TIMEQUANT_H
 
#include "lib/time/timevalue.hpp"
#include "lib/time/quantiser.hpp"
#include "lib/time/timecode.hpp"
#include "lib/symbol.hpp"
 
#include <string>
 
 
namespace lib {
namespace time {
  
  using lib::Symbol;
  
  
  class QuTime
    : public Time
    {
      PQuant quantiser_;
      
    public:
      QuTime (TimeValue raw, Symbol gridID);               
      QuTime (TimeValue raw, PQuant quantisation_to_use);
      
      operator PQuant()  const;                            
      
      template<class FMT>
      bool supports()  const;                              
      
      template<class FMT>
      format::Traits<FMT>::TimeCode
      formatAs()  const;                                   
      
      template<class TC>
      void
      castInto (TC& timecode)  const;                      
      
      void accept (Mutation const&);
    };
  
  
  
  /* == implementation == */
  
  inline
  QuTime::operator PQuant()  const
  {
    ASSERT (quantiser_);
    return quantiser_;
  }
 
  template<class FMT>
  inline bool
  QuTime::supports()  const
  {
    return quantiser_->supports<FMT>();
  }
  
  
  template<class FMT>
  inline format::Traits<FMT>::TimeCode
  QuTime::formatAs()  const
  {
    using TC = format::Traits<FMT>::TimeCode;
    return TC(*this);
  }
  
  
  template<class TC>
  inline void
  QuTime::castInto (TC& timecode)  const
  {
    using Format = TC::Format;
    REQUIRE (supports<Format>());
    
    Format::rebuild (timecode, *quantiser_, TimeValue(*this));
  }
  
  
}} // lib::time
#endif