The Synthesis ToolKit in C++ (STK)

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Simple.h
1 #ifndef STK_SIMPLE_H
2 #define STK_SIMPLE_H
3
4 #include "Instrmnt.h"
5 #include "ADSR.h"
6 #include "FileLoop.h"
7 #include "OnePole.h"
8 #include "BiQuad.h"
9 #include "Noise.h"
10
11 namespace stk {
12
13 /***************************************************/
30 /***************************************************/
31
32 class Simple : public Instrmnt
33 {
34 public:
36
39 Simple( void );
40
42 ~Simple( void );
43
45 void setFrequency( StkFloat frequency );
46
48 void keyOn( void );
49
51 void keyOff( void );
52
54 void noteOn( StkFloat frequency, StkFloat amplitude );
55
57 void noteOff( StkFloat amplitude );
58
60 void controlChange( int number, StkFloat value );
61
63 StkFloat tick( unsigned int channel = 0 );
64
66
73 StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
74
75 protected:
76
77 ADSR adsr_;
78 FileLoop *loop_;
79 OnePole filter_;
80 BiQuad biquad_;
81 Noise noise_;
82 StkFloat baseFrequency_;
83 StkFloat loopGain_;
84
85 };
86
87 inline StkFloat Simple :: tick( unsigned int )
88 {
89 lastFrame_[0] = loopGain_ * loop_->tick();
90 biquad_.tick( noise_.tick() );
91 lastFrame_[0] += (1.0 - loopGain_) * biquad_.lastOut();
92 lastFrame_[0] = filter_.tick( lastFrame_[0] );
93 lastFrame_[0] *= adsr_.tick();
94 return lastFrame_[0];
95 }
96
97 inline StkFrames& Simple :: tick( StkFrames& frames, unsigned int channel )
98 {
99 unsigned int nChannels = lastFrame_.channels();
100 #if defined(_STK_DEBUG_)
101 if ( channel > frames.channels() - nChannels ) {
102 oStream_ << "Simple::tick(): channel and StkFrames arguments are incompatible!";
103 handleError( StkError::FUNCTION_ARGUMENT );
104 }
105 #endif
106
107 StkFloat *samples = &frames[channel];
108 unsigned int j, hop = frames.channels() - nChannels;
109 if ( nChannels == 1 ) {
110 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
111 *samples++ = tick();
112 }
113 else {
114 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
115 *samples++ = tick();
116 for ( j=1; j<nChannels; j++ )
117 *samples++ = lastFrame_[j];
118 }
119 }
120
121 return frames;
122 }
123
124 } // stk namespace
125
126 #endif

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