p-chan 0.2.1

Multimedia (Audio, Raster) Channel Newtypes and Conversions
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

//! Signed channel newtypes

use crate::ops::Conversion;

macro_rules! midpoint {
    () => {
        /// Calculates the middle point of `self` and `rhs`.
        ///
        /// `midpoint(a, b)` is `(a + b) / 2` calculated without overflow,
        /// rounded down.
        pub const fn midpoint(self, rhs: Self) -> Self {
            use crate::math::{Signed, Unsigned};

            let this = Unsigned(self.0).reinterpret_with_offset();
            let rhs = Unsigned(rhs.0).reinterpret_with_offset();

            Self(Signed(this.midpoint(rhs)).reinterpret_with_offset())
        }
    };
}

ch_int!(
    (Ch8, i8, i16, core::convert::identity, midpoint! {}),
    doc = "8-bit signed integer (-128 to 127) channel value",
);

ch_int!(
    (Ch12, i16, i32, normalize_ch12, midpoint! {}),
    doc = "12-bit signed integer (-2\\_048 to 2\\_047) channel value",
);

ch_int!(
    (Ch16, i16, i32, core::convert::identity, midpoint! {}),
    doc = "16-bit signed integer (-32\\_768 to 32\\_767) channel value",
);

ch_int!(
    (Ch24, i32, i64, normalize_ch24, midpoint! {}),
    doc =
        "24-bit signed integer (-8\\_388\\_608 to 8\\_388\\_607) channel value",
);

ch_float!(
    (Ch32, f32, crate::math::normalize_f32, -1.0, 0.0),
    doc = "32-bit float (-1 to 1) channel value",
);

ch_float!(
    (Ch64, f64, crate::math::normalize_f64, -1.0, 0.0),
    doc = "64-bit float (-1 to 1) channel value",
);

const fn normalize_ch12(mut chan: i16) -> i16 {
    if chan > 2_i16.pow(11) - 1 {
        chan = 2_i16.pow(11) - 1;
    }

    if chan < -2_i16.pow(11) {
        chan = -2_i16.pow(11);
    }

    chan
}

const fn normalize_ch24(mut chan: i32) -> i32 {
    if chan > 2_i32.pow(23) - 1 {
        chan = 2_i32.pow(23) - 1;
    }

    if chan < -2_i32.pow(23) {
        chan = -2_i32.pow(23);
    }

    chan
}

conversion!(Ch8, Ch12);
conversion!(Ch8, Ch16);
conversion!(Ch8, Ch24);
conversion!(Ch8, Ch32);
conversion!(Ch8, Ch64);

conversion!(Ch12, Ch8);
conversion!(Ch12, Ch16);
conversion!(Ch12, Ch24);
conversion!(Ch12, Ch32);
conversion!(Ch12, Ch64);

conversion!(Ch16, Ch8);
conversion!(Ch16, Ch12);
conversion!(Ch16, Ch24);
conversion!(Ch16, Ch32);
conversion!(Ch16, Ch64);

conversion!(Ch24, Ch8);
conversion!(Ch24, Ch12);
conversion!(Ch24, Ch16);
conversion!(Ch24, Ch32);
conversion!(Ch24, Ch64);

conversion!(Ch32, Ch8);
conversion!(Ch32, Ch12);
conversion!(Ch32, Ch16);
conversion!(Ch32, Ch24);
conversion!(Ch32, Ch64);

conversion!(Ch64, Ch8);
conversion!(Ch64, Ch12);
conversion!(Ch64, Ch16);
conversion!(Ch64, Ch24);
conversion!(Ch64, Ch32);

#[cfg(feature = "unsigned")]
mod unsigned {
    use super::*;
    use crate::unsigned;

    conversion!(unsigned::Ch8, Ch12);
    conversion!(unsigned::Ch8, Ch16);
    conversion!(unsigned::Ch8, Ch24);
    conversion!(unsigned::Ch8, Ch32);
    conversion!(unsigned::Ch8, Ch64);

    conversion!(unsigned::Ch12, Ch8);
    conversion!(unsigned::Ch12, Ch16);
    conversion!(unsigned::Ch12, Ch24);
    conversion!(unsigned::Ch12, Ch32);
    conversion!(unsigned::Ch12, Ch64);

    conversion!(unsigned::Ch16, Ch8);
    conversion!(unsigned::Ch16, Ch12);
    conversion!(unsigned::Ch16, Ch24);
    conversion!(unsigned::Ch16, Ch32);
    conversion!(unsigned::Ch16, Ch64);

    conversion!(unsigned::Ch24, Ch8);
    conversion!(unsigned::Ch24, Ch12);
    conversion!(unsigned::Ch24, Ch16);
    conversion!(unsigned::Ch24, Ch32);
    conversion!(unsigned::Ch24, Ch64);

    conversion!(unsigned::Ch32, Ch8);
    conversion!(unsigned::Ch32, Ch12);
    conversion!(unsigned::Ch32, Ch16);
    conversion!(unsigned::Ch32, Ch24);
    conversion!(unsigned::Ch32, Ch64);

    conversion!(unsigned::Ch64, Ch8);
    conversion!(unsigned::Ch64, Ch12);
    conversion!(unsigned::Ch64, Ch16);
    conversion!(unsigned::Ch64, Ch24);
    conversion!(unsigned::Ch64, Ch32);

    conversion!(unsigned::Ch8, Ch8);
    conversion!(unsigned::Ch12, Ch12);
    conversion!(unsigned::Ch16, Ch16);
    conversion!(unsigned::Ch24, Ch24);
    conversion!(unsigned::Ch32, Ch32);
    conversion!(unsigned::Ch64, Ch64);
}