mirror of
https://github.com/cookiengineer/audacity
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75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
/***************************************************/
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/*! \class Effect
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\brief STK abstract effects parent class.
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This class provides common functionality for
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STK effects subclasses.
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by Perry R. Cook and Gary P. Scavone, 1995 - 2005.
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*/
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/***************************************************/
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#include "Stk.h"
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#ifndef STK_EFFECT_H
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#define STK_EFFECT_H
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namespace Nyq
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{
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class Effect : public Stk
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{
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public:
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//! Class constructor.
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Effect();
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//! Class destructor.
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virtual ~Effect();
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//! Reset and clear all internal state.
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virtual void clear() = 0;
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//! Set the mixture of input and "effected" levels in the output (0.0 = input only, 1.0 = reverb only).
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void setEffectMix(StkFloat mix);
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//! Return the last output value.
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StkFloat lastOut() const;
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//! Return the last left output value.
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StkFloat lastOutLeft() const;
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//! Return the last right output value.
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StkFloat lastOutRight() const;
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//! Take one sample input and compute one sample of output.
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StkFloat tick( StkFloat input );
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//! Take a channel of the StkFrames object as inputs to the effect and replace with corresponding outputs.
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/*!
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The \c channel argument should be zero or greater (the first
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channel is specified by 0). An StkError will be thrown if the \c
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channel argument is equal to or greater than the number of
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channels in the StkFrames object.
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*/
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StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
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protected:
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// This abstract function must be implemented in all subclasses.
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// It is used to get around a C++ problem with overloaded virtual
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// functions.
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virtual StkFloat computeSample( StkFloat input ) = 0;
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// Returns true if argument value is prime.
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bool isPrime( int number );
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StkFloat lastOutput_[2];
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StkFloat effectMix_;
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};
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} // namespace Nyq
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#endif
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