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FMVoices.h
1 #ifndef STK_FMVOICES_H
2 #define STK_FMVOICES_H
3 
4 #include "FM.h"
5 
6 namespace stk {
7 
8 /***************************************************/
38 /***************************************************/
39 
40 class FMVoices : public FM
41 {
42  public:
44 
47  FMVoices( void );
48 
50  ~FMVoices( void );
51 
53  void setFrequency( StkFloat frequency );
54 
56  void noteOn( StkFloat frequency, StkFloat amplitude );
57 
59  void controlChange( int number, StkFloat value );
60 
62  StkFloat tick( unsigned int channel = 0 );
63 
65 
72  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
73 
74  protected:
75 
76  int currentVowel_;
77  StkFloat tilt_[3];
78  StkFloat mods_[3];
79 };
80 
81 inline StkFloat FMVoices :: tick( unsigned int )
82 {
83  StkFloat temp, temp2;
84 
85  temp = gains_[3] * adsr_[3]->tick() * waves_[3]->tick();
86  temp2 = vibrato_.tick() * modDepth_ * 0.1;
87 
88  waves_[0]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[0]);
89  waves_[1]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[1]);
90  waves_[2]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[2]);
91  waves_[3]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[3]);
92 
93  waves_[0]->addPhaseOffset(temp * mods_[0]);
94  waves_[1]->addPhaseOffset(temp * mods_[1]);
95  waves_[2]->addPhaseOffset(temp * mods_[2]);
96  waves_[3]->addPhaseOffset( twozero_.lastOut() );
97  twozero_.tick( temp );
98  temp = gains_[0] * tilt_[0] * adsr_[0]->tick() * waves_[0]->tick();
99  temp += gains_[1] * tilt_[1] * adsr_[1]->tick() * waves_[1]->tick();
100  temp += gains_[2] * tilt_[2] * adsr_[2]->tick() * waves_[2]->tick();
101 
102  lastFrame_[0] = temp * 0.33;
103  return lastFrame_[0];
104 }
105 
106 inline StkFrames& FMVoices :: tick( StkFrames& frames, unsigned int channel )
107 {
108  unsigned int nChannels = lastFrame_.channels();
109 #if defined(_STK_DEBUG_)
110  if ( channel > frames.channels() - nChannels ) {
111  oStream_ << "FMVoices::tick(): channel and StkFrames arguments are incompatible!";
112  handleError( StkError::FUNCTION_ARGUMENT );
113  }
114 #endif
115 
116  StkFloat *samples = &frames[channel];
117  unsigned int j, hop = frames.channels() - nChannels;
118  if ( nChannels == 1 ) {
119  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
120  *samples++ = tick();
121  }
122  else {
123  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
124  *samples++ = tick();
125  for ( j=1; j<nChannels; j++ )
126  *samples++ = lastFrame_[j];
127  }
128  }
129 
130  return frames;
131 }
132 
133 } // stk namespace
134 
135 #endif

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