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Plucked.h
1 #ifndef STK_PLUCKED_H
2 #define STK_PLUCKED_H
3 
4 #include "Instrmnt.h"
5 #include "DelayA.h"
6 #include "OneZero.h"
7 #include "OnePole.h"
8 #include "Noise.h"
9 
10 namespace stk {
11 
12 /***************************************************/
32 /***************************************************/
33 
34 class Plucked : public Instrmnt
35 {
36  public:
38  Plucked( StkFloat lowestFrequency = 10.0 );
39 
41  ~Plucked( void );
42 
44  void clear( void );
45 
47  void setFrequency( StkFloat frequency );
48 
50  void pluck( StkFloat amplitude );
51 
53  void noteOn( StkFloat frequency, StkFloat amplitude );
54 
56  void noteOff( StkFloat amplitude );
57 
59  StkFloat tick( unsigned int channel = 0 );
60 
62 
69  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
70 
71  protected:
72 
73  DelayA delayLine_;
74  OneZero loopFilter_;
75  OnePole pickFilter_;
76  Noise noise_;
77 
78  StkFloat loopGain_;
79 };
80 
81 inline StkFloat Plucked :: tick( unsigned int )
82 {
83  // Here's the whole inner loop of the instrument!!
84  return lastFrame_[0] = 3.0 * delayLine_.tick( loopFilter_.tick( delayLine_.lastOut() * loopGain_ ) );
85 }
86 
87 inline StkFrames& Plucked :: tick( StkFrames& frames, unsigned int channel )
88 {
89  unsigned int nChannels = lastFrame_.channels();
90 #if defined(_STK_DEBUG_)
91  if ( channel > frames.channels() - nChannels ) {
92  oStream_ << "Plucked::tick(): channel and StkFrames arguments are incompatible!";
93  handleError( StkError::FUNCTION_ARGUMENT );
94  }
95 #endif
96 
97  StkFloat *samples = &frames[channel];
98  unsigned int j, hop = frames.channels() - nChannels;
99  if ( nChannels == 1 ) {
100  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
101  *samples++ = tick();
102  }
103  else {
104  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
105  *samples++ = tick();
106  for ( j=1; j<nChannels; j++ )
107  *samples++ = lastFrame_[j];
108  }
109  }
110 
111  return frames;
112 }
113 
114 } // stk namespace
115 
116 #endif
117 

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