The Synthesis ToolKit in C++ (STK)

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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

The Synthesis ToolKit in C++ (STK)
©1995--2017 Perry R. Cook and Gary P. Scavone. All Rights Reserved.