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PercFlut.h
1 #ifndef STK_PERCFLUT_H
2 #define STK_PERCFLUT_H
3
4 #include "FM.h"
5
6 namespace stk {
7
8 /***************************************************/
34 /***************************************************/
35
36 class PercFlut : public FM
37 {
38 public:
40
43 PercFlut( void );
44
46 ~PercFlut( void );
47
49 void setFrequency( StkFloat frequency );
50
52 void noteOn( StkFloat frequency, StkFloat amplitude );
53
55 StkFloat tick( unsigned int channel = 0 );
56
58
65 StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
66
67 protected:
68
69 };
70
71 inline StkFloat PercFlut :: tick( unsigned int )
72 {
73 StkFloat temp;
74
75 temp = vibrato_.tick() * modDepth_ * 0.2;
76 waves_[0]->setFrequency(baseFrequency_ * (1.0 + temp) * ratios_[0]);
77 waves_[1]->setFrequency(baseFrequency_ * (1.0 + temp) * ratios_[1]);
78 waves_[2]->setFrequency(baseFrequency_ * (1.0 + temp) * ratios_[2]);
79 waves_[3]->setFrequency(baseFrequency_ * (1.0 + temp) * ratios_[3]);
80
81 waves_[3]->addPhaseOffset( twozero_.lastOut() );
82 temp = gains_[3] * adsr_[3]->tick() * waves_[3]->tick();
83
84 twozero_.tick(temp);
85 waves_[2]->addPhaseOffset( temp );
86 temp = (1.0 - (control2_ * 0.5)) * gains_[2] * adsr_[2]->tick() * waves_[2]->tick();
87
88 temp += control2_ * 0.5 * gains_[1] * adsr_[1]->tick() * waves_[1]->tick();
89 temp = temp * control1_;
90
91 waves_[0]->addPhaseOffset(temp);
92 temp = gains_[0] * adsr_[0]->tick() * waves_[0]->tick();
93
94 lastFrame_[0] = temp * 0.5;
95 return lastFrame_[0];
96 }
97
98 inline StkFrames& PercFlut :: tick( StkFrames& frames, unsigned int channel )
99 {
100 unsigned int nChannels = lastFrame_.channels();
101 #if defined(_STK_DEBUG_)
102 if ( channel > frames.channels() - nChannels ) {
103 oStream_ << "PercFlut::tick(): channel and StkFrames arguments are incompatible!";
104 handleError( StkError::FUNCTION_ARGUMENT );
105 }
106 #endif
107
108 StkFloat *samples = &frames[channel];
109 unsigned int j, hop = frames.channels() - nChannels;
110 if ( nChannels == 1 ) {
111 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
112 *samples++ = tick();
113 }
114 else {
115 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
116 *samples++ = tick();
117 for ( j=1; j<nChannels; j++ )
118 *samples++ = lastFrame_[j];
119 }
120 }
121
122 return frames;
123 }
124
125 } // stk namespace
126
127 #endif

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