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Wurley.h
1 #ifndef STK_WURLEY_H
2 #define STK_WURLEY_H
3 
4 #include "FM.h"
5 
6 namespace stk {
7 
8 /***************************************************/
38 /***************************************************/
39 
40 class Wurley : public FM
41 {
42  public:
44 
47  Wurley( void );
48 
50  ~Wurley( void );
51 
53  void setFrequency( StkFloat frequency );
54 
56  void noteOn( StkFloat frequency, 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 };
74 
75 inline StkFloat Wurley :: tick( unsigned int )
76 {
77  StkFloat temp, temp2;
78 
79  temp = gains_[1] * adsr_[1]->tick() * waves_[1]->tick();
80  temp = temp * control1_;
81 
82  waves_[0]->addPhaseOffset( temp );
83  waves_[3]->addPhaseOffset( twozero_.lastOut() );
84  temp = gains_[3] * adsr_[3]->tick() * waves_[3]->tick();
85  twozero_.tick(temp);
86 
87  waves_[2]->addPhaseOffset( temp );
88  temp = ( 1.0 - (control2_ * 0.5)) * gains_[0] * adsr_[0]->tick() * waves_[0]->tick();
89  temp += control2_ * 0.5 * gains_[2] * adsr_[2]->tick() * waves_[2]->tick();
90 
91  // Calculate amplitude modulation and apply it to output.
92  temp2 = vibrato_.tick() * modDepth_;
93  temp = temp * (1.0 + temp2);
94 
95  lastFrame_[0] = temp * 0.5;
96  return lastFrame_[0];
97 }
98 
99 inline StkFrames& Wurley :: tick( StkFrames& frames, unsigned int channel )
100 {
101  unsigned int nChannels = lastFrame_.channels();
102 #if defined(_STK_DEBUG_)
103  if ( channel > frames.channels() - nChannels ) {
104  oStream_ << "Wurley::tick(): channel and StkFrames arguments are incompatible!";
105  handleError( StkError::FUNCTION_ARGUMENT );
106  }
107 #endif
108 
109  StkFloat *samples = &frames[channel];
110  unsigned int j, hop = frames.channels() - nChannels;
111  if ( nChannels == 1 ) {
112  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
113  *samples++ = tick();
114  }
115  else {
116  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
117  *samples++ = tick();
118  for ( j=1; j<nChannels; j++ )
119  *samples++ = lastFrame_[j];
120  }
121  }
122 
123  return frames;
124 }
125 
126 } // stk namespace
127 
128 #endif

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