mirror of
https://github.com/thestk/stk
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77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/***************************************************/
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/*! \class Sampler
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\brief STK sampling synthesis abstract base class.
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This instrument provides an ADSR envelope, a one-pole filter, and
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structures for an arbitrary number of attack and loop waves.
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by Perry R. Cook and Gary P. Scavone, 1995 - 2004.
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*/
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/***************************************************/
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#ifndef STK_SAMPLER_H
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#define STK_SAMPLER_H
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#include "Instrmnt.h"
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#include "ADSR.h"
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#include "WvIn.h"
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#include "WaveLoop.h"
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#include "OnePole.h"
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class Sampler : public Instrmnt
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{
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public:
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//! Default constructor.
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Sampler();
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//! Class destructor.
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virtual ~Sampler();
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//! Reset and clear all internal state.
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void clear();
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//! Set instrument parameters for a particular frequency.
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virtual void setFrequency(StkFloat frequency) = 0;
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//! Initiate the envelopes with a key-on event and reset the attack waves.
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void keyOn();
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//! Signal a key-off event to the envelopes.
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void keyOff();
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//! Stop a note with the given amplitude (speed of decay).
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virtual void noteOff(StkFloat amplitude);
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//! Compute one output sample.
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virtual StkFloat tick() = 0;
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//! Computer \e vectorSize outputs and return them in \e vector.
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virtual StkFloat *tick(StkFloat *vector, unsigned int vectorSize) = 0;
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//! Fill a channel of the StkFrames object with computed outputs.
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/*!
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The \c channel argument should be one or greater (the first
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channel is specified by 1). An StkError will be thrown if the \c
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channel argument is zero or it is greater than the number of
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channels in the StkFrames object.
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*/
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virtual StkFrames& tick( StkFrames& frames, unsigned int channel = 1 ) = 0;
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//! Perform the control change specified by \e number and \e value (0.0 - 128.0).
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virtual void controlChange(int number, StkFloat value) = 0;
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protected:
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ADSR adsr_;
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std::vector<WvIn *> attacks_;
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std::vector<WaveLoop *> loops_;
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OnePole filter_;
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StkFloat baseFrequency_;
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std::vector<StkFloat> attackRatios_;
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std::vector<StkFloat> loopRatios_;
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StkFloat attackGain_;
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StkFloat loopGain_;
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};
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#endif
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