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Viewing changes to libecasound/oscillator.h

  • Committer: Bazaar Package Importer
  • Author(s): Alessandro Ghedini
  • Date: 2011-05-12 17:58:03 UTC
  • Revision ID: james.westby@ubuntu.com-20110512175803-zy3lodjecabt9r3v
Tags: upstream-2.8.0
Import upstream version 2.8.0

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libecasound/oscillator.h
 
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#ifndef INCLUDED_OSCILLATOR_H
 
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#define INCLUDED_OSCILLATOR_H
 
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#include <cmath>
 
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#include <string>
 
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#include "ctrl-source.h"
 
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/**
 
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 * Base class for various oscillators
 
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 *
 
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 * Unlike finite controller sources, oscillators
 
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 * produce new values infinately.
 
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 */
 
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class OSCILLATOR : public CONTROLLER_SOURCE {
 
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 public:
 
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  virtual void set_initial_value(parameter_t arg) {}
 
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  /**
 
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   * Constructor
 
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   * 
 
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   * @param freq Oscillator frequency
 
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   * @param phase Initial phase, multiple of pi
 
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   */
 
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  OSCILLATOR(parameter_t freq = 0, parameter_t initial_phase = 0) { 
 
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    freq_value = freq;
 
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    phase_value = initial_phase * M_PI;
 
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  }
 
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 private:
 
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  parameter_t freq_value, phase_value;
 
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 protected:
 
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  parameter_t phase_offset(void) const { return(phase_value); }  
 
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  parameter_t frequency(void) const { return(freq_value); }
 
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  void phase_offset(parameter_t v) { phase_value = v; }
 
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  void frequency(parameter_t v) { freq_value = v; }
 
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};
 
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#endif