saturation 0.2.3

Real-time saturation and clipping designed for use with vst's
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160

use real_time_fir_iir_filters::{conf::LowPass, filters::iir::first::FirstOrderRCFilter, param::{FilterFloat, RC}, rtf::{Rtf, StaticRtf}};

use super::{TriodeClassA, TriodeModel};

use crate::f;

pub trait TriodeCathodeFilter<F, M>
where
    F: FilterFloat,
    M: TriodeModel
{
    type Param;

    fn new_cathode_filter(param: Self::Param) -> Self;

    fn param_cathode(&self) -> &Self::Param;
    fn param_cathode_mut(&mut self) -> &mut Self::Param;

    fn vg_cathode(&mut self, param: TriodeClassA<F>, miller_effect: F, rate: F, x: F) -> F;
}
impl<F, M> TriodeCathodeFilter<F, M> for ()
where
    F: FilterFloat,
    M: TriodeModel
{
    type Param = ();

    fn new_cathode_filter(_: Self::Param) -> Self
    {
        
    }

    fn param_cathode(&self) -> &Self::Param
    {
        self
    }
    fn param_cathode_mut(&mut self) -> &mut Self::Param
    {
        self
    }

    fn vg_cathode(&mut self, _: TriodeClassA<F>, _: F, _: F, x: F) -> F
    {
        x
    }
}
impl<F, M> TriodeCathodeFilter<F, M> for FirstOrderRCFilter<LowPass, F, RC<F>>
where
    F: FilterFloat,
    M: TriodeModel,
    Self: Rtf<F = F, Outputs<F> = [F; 1], Param = RC<F>>
{
    type Param = RC<F>;

    fn new_cathode_filter(param: Self::Param) -> Self
    {
        Self::new(param)
    }

    fn param_cathode(&self) -> &Self::Param
    {
        self.get_param()
    }
    fn param_cathode_mut(&mut self) -> &mut Self::Param
    {
        self.get_param_mut()
    }

    fn vg_cathode(&mut self, param: TriodeClassA<F>, miller_effect: F, rate: F, x: F) -> F
    {
        let [vg_miller] = self.filter(rate, (x*miller_effect - x)*self.param.r/param.r_p);
        x - vg_miller
    }
}

pub trait TriodeFilter<F, M>
where
    F: FilterFloat,
    M: TriodeModel
{
    fn new_input_filter(r_i: F) -> Self;
    fn new_output_filter(r_p: F) -> Self;

    fn update_miller_effect_input(&mut self, miller_effect: F);
    fn update_miller_effect_output(&mut self, miller_effect: F);

    fn vg(&mut self, param: TriodeClassA<F>, rate: F, x: F) -> F;
    fn y(&mut self, rate: F, y: F) -> F;
}
impl<F, M> TriodeFilter<F, M> for ()
where
    F: FilterFloat,
    M: TriodeModel
{
    fn new_input_filter(_: F) -> Self
    {
        
    }

    fn new_output_filter(_: F) -> Self
    {
        
    }

    fn update_miller_effect_input(&mut self, _: F)
    {

    }
    fn update_miller_effect_output(&mut self, _: F)
    {

    }

    fn vg(&mut self, param: TriodeClassA<F>, _: F, x: F) -> F
    {
        let ri = param.r_i;
        let rgi = f!(M::R_GI);

        x*rgi/(rgi + ri) - param.v_c
    }
    fn y(&mut self, _: F, y: F) -> F
    {
        y
    }
}
impl<F, M> TriodeFilter<F, M> for FirstOrderRCFilter<LowPass, F, RC<F>>
where
    F: FilterFloat,
    M: TriodeModel,
    Self: Rtf<F = F, Outputs<F> = [F; 1]>
{
    fn new_input_filter(r_i: F) -> Self
    {
        FirstOrderRCFilter::new(RC {r: r_i, c: f!(M::C_CG + M::C_PG)})
    }
    fn new_output_filter(r_p: F) -> Self
    {
        FirstOrderRCFilter::new(RC {r: r_p, c: f!(M::C_CP + M::C_PG)})
    }

    fn update_miller_effect_input(&mut self, miller_effect: F)
    {
        self.param.c = f!(M::C_CG) + f!(M::C_PG)*miller_effect;
    }
    fn update_miller_effect_output(&mut self, miller_effect: F)
    {
        self.param.c = f!(M::C_CP) + f!(M::C_PG)*miller_effect;
    }

    fn vg(&mut self, param: TriodeClassA<F>, rate: F, x: F) -> F
    {
        let [vg] = self.filter(rate, TriodeFilter::<F, M>::vg(&mut (), param, rate, x));
        vg
    }
    fn y(&mut self, rate: F, y: F) -> F
    {
        let [y] = self.filter(rate, TriodeFilter::<F, M>::y(&mut (), rate, y));
        y
    }
}