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

use super::{AudioFormat, ChannelCount, Direction};

/**
 * Unspecified marker type for use everywhere
 */
pub struct Unspecified;

/**
 * The trait for direction marker types
 */
pub trait IsDirection {
    const DIRECTION: Direction;
    // type BufferType<T: IsFrameType>;
    // ^unstable feature
}

/**
 * The input direction marker
 */
pub struct Input;

impl IsDirection for Input {
    const DIRECTION: Direction = Direction::Input;
    // type BufferType<'b, T: IsFrameType> = &'b [<T as IsFrameType>::Type];
    // ^unstable feature
}

/**
 * The output direction marker
 */
pub struct Output;

impl IsDirection for Output {
    const DIRECTION: Direction = Direction::Output;
    // type BufferType<'b, T: IsFrameType> = &'b mut [<T as IsFrameType>::Type];
    // ^unstable feature
}

/**
 * The traint for format marker types
 */
pub trait IsFormat {
    const FORMAT: AudioFormat;
}

impl IsFormat for Unspecified {
    const FORMAT: AudioFormat = AudioFormat::Unspecified;
}

impl IsFormat for i16 {
    const FORMAT: AudioFormat = AudioFormat::I16;
}

impl IsFormat for f32 {
    const FORMAT: AudioFormat = AudioFormat::F32;
}

/**
 * The trait for channel count marker types
 */
pub trait IsChannelCount {
    const CHANNEL_COUNT: ChannelCount;
}

impl IsChannelCount for Unspecified {
    const CHANNEL_COUNT: ChannelCount = ChannelCount::Unspecified;
}

/**
 * The single mono channel configuration marker
 */
pub struct Mono;

impl IsChannelCount for Mono {
    const CHANNEL_COUNT: ChannelCount = ChannelCount::Mono;
}

/**
 * The dual stereo channels configuration marker
 */
pub struct Stereo;

impl IsChannelCount for Stereo {
    const CHANNEL_COUNT: ChannelCount = ChannelCount::Stereo;
}

pub enum AltFrame<T: IsFormat> {
    Mono(T),
    Stereo(T, T),
}

/**
 * The trait for frame type marker types
 */
pub trait IsFrameType {
    type Type;
    type Format: IsFormat;
    type ChannelCount: IsChannelCount;
}

impl<T: IsFormat> IsFrameType for (T, Unspecified) {
    type Type = AltFrame<T>;
    type Format = T;
    type ChannelCount = Unspecified;
}

impl<T: IsFormat> IsFrameType for (T, Mono) {
    type Type = T;
    type Format = T;
    type ChannelCount = Mono;
}

impl<T: IsFormat> IsFrameType for (T, Stereo) {
    type Type = (T, T);
    type Format = T;
    type ChannelCount = Stereo;
}