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PRCRev.h
1 #ifndef STK_PRCREV_H
2 #define STK_PRCREV_H
3
4 #include "Effect.h"
5 #include "Delay.h"
6
7 namespace stk {
8
9 /***************************************************/
22 /***************************************************/
23
24 class PRCRev : public Effect
25 {
26 public:
28 PRCRev( StkFloat T60 = 1.0 );
29
31 void clear( void );
32
34 void setT60( StkFloat T60 );
35
37
45 StkFloat lastOut( unsigned int channel = 0 );
46
48
55 StkFloat tick( StkFloat input, unsigned int channel = 0 );
56
58
67 StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
68
70
79 StkFrames& tick( StkFrames& iFrames, StkFrames &oFrames, unsigned int iChannel = 0, unsigned int oChannel = 0 );
80
81 protected:
82
83 Delay allpassDelays_[2];
84 Delay combDelays_[2];
85 StkFloat allpassCoefficient_;
86 StkFloat combCoefficient_[2];
87
88 };
89
90 inline StkFloat PRCRev :: lastOut( unsigned int channel )
91 {
92 #if defined(_STK_DEBUG_)
93 if ( channel > 1 ) {
94 oStream_ << "PRCRev::lastOut(): channel argument must be less than 2!";
95 handleError( StkError::FUNCTION_ARGUMENT );
96 }
97 #endif
98
99 return lastFrame_[channel];
100 }
101
102 inline StkFloat PRCRev :: tick( StkFloat input, unsigned int channel )
103 {
104 #if defined(_STK_DEBUG_)
105 if ( channel > 1 ) {
106 oStream_ << "PRCRev::tick(): channel argument must be less than 2!";
107 handleError( StkError::FUNCTION_ARGUMENT );
108 }
109 #endif
110
111 StkFloat temp, temp0, temp1, temp2, temp3;
112
113 temp = allpassDelays_[0].lastOut();
114 temp0 = allpassCoefficient_ * temp;
115 temp0 += input;
116 allpassDelays_[0].tick(temp0);
117 temp0 = -(allpassCoefficient_ * temp0) + temp;
118
119 temp = allpassDelays_[1].lastOut();
120 temp1 = allpassCoefficient_ * temp;
121 temp1 += temp0;
122 allpassDelays_[1].tick(temp1);
123 temp1 = -(allpassCoefficient_ * temp1) + temp;
124
125 temp2 = temp1 + ( combCoefficient_[0] * combDelays_[0].lastOut() );
126 temp3 = temp1 + ( combCoefficient_[1] * combDelays_[1].lastOut() );
127
128 lastFrame_[0] = effectMix_ * (combDelays_[0].tick(temp2));
129 lastFrame_[1] = effectMix_ * (combDelays_[1].tick(temp3));
130 temp = (1.0 - effectMix_) * input;
131 lastFrame_[0] += temp;
132 lastFrame_[1] += temp;
133
134 return lastFrame_[channel];
135 }
136
137 } // stk namespace
138
139 #endif
140

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