maolan 0.2.2

Rust DAW application for recording, editing, routing, automation, export, and plugin hosting
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
161
162

#[cfg(target_os = "windows")]
use cpal::traits::{DeviceTrait, HostTrait};
#[cfg(target_os = "windows")]
use cpal::{SampleFormat, SupportedStreamConfigRange};

#[cfg(target_os = "windows")]
enum WindowsDeviceDirection {
    Input,
    Output,
}

#[cfg(target_os = "windows")]
fn discover_windows_devices(direction: WindowsDeviceDirection) -> Vec<String> {
    let mut out = vec!["wasapi:default".to_string()];
    let Ok(host) = cpal::host_from_id(cpal::HostId::Wasapi) else {
        return out;
    };
    let devices = match direction {
        WindowsDeviceDirection::Input => host.input_devices(),
        WindowsDeviceDirection::Output => host.output_devices(),
    };
    let Ok(devices) = devices else {
        return out;
    };
    for dev in devices {
        if let Ok(desc) = dev.description() {
            out.push(format!("wasapi:{}", desc.name()));
        }
    }
    out.sort();
    out.dedup();
    out
}

#[cfg(target_os = "windows")]
pub(crate) fn discover_windows_audio_devices() -> Vec<String> {
    discover_windows_devices(WindowsDeviceDirection::Output)
}

#[cfg(target_os = "windows")]
pub(crate) fn discover_windows_input_devices() -> Vec<String> {
    discover_windows_devices(WindowsDeviceDirection::Input)
}

#[cfg(target_os = "windows")]
pub(crate) fn discover_windows_output_sample_rates(device_id: &str) -> Vec<i32> {
    let fallback_sample_rates = vec![
        8_000, 11_025, 16_000, 22_050, 32_000, 44_100, 48_000, 88_200, 96_000, 176_400, 192_000,
        384_000,
    ];
    let requested_name = if let Some(name) = device_id.strip_prefix("wasapi:") {
        name
    } else {
        return fallback_sample_rates;
    };
    let Ok(host) = cpal::host_from_id(cpal::HostId::Wasapi) else {
        return fallback_sample_rates;
    };
    let device = if requested_name == "default" {
        host.default_output_device()
    } else {
        let Ok(mut devices) = host.output_devices() else {
            return fallback_sample_rates;
        };
        devices.find(|dev| {
            dev.description()
                .is_ok_and(|desc| desc.name() == requested_name)
        })
    };
    let Some(device) = device else {
        return fallback_sample_rates;
    };
    let Ok(configs) = device.supported_output_configs() else {
        return fallback_sample_rates;
    };
    let mut rates = Vec::new();
    for cfg in configs {
        #[cfg(unix)]
        let min_hz = cfg.min_sample_rate().0 as i32;
        #[cfg(not(unix))]
        let min_hz = cfg.min_sample_rate() as i32;
        #[cfg(unix)]
        let max_hz = cfg.max_sample_rate().0 as i32;
        #[cfg(not(unix))]
        let max_hz = cfg.max_sample_rate() as i32;
        rates.extend(
            fallback_sample_rates
                .iter()
                .copied()
                .filter(|rate| *rate >= min_hz && *rate <= max_hz),
        );
    }
    rates.sort_unstable();
    rates.dedup();
    if rates.is_empty() {
        fallback_sample_rates
    } else {
        rates
    }
}

#[cfg(target_os = "windows")]
fn bit_depth_from_sample_format(format: SampleFormat) -> Option<usize> {
    match format {
        SampleFormat::I8 | SampleFormat::U8 => Some(8),
        SampleFormat::I16 | SampleFormat::U16 => Some(16),
        SampleFormat::I32
        | SampleFormat::U32
        | SampleFormat::F32
        | SampleFormat::I64
        | SampleFormat::U64
        | SampleFormat::F64 => Some(32),
        _ => None,
    }
}

#[cfg(target_os = "windows")]
fn collect_supported_output_bit_depths(
    configs: impl Iterator<Item = SupportedStreamConfigRange>,
) -> Vec<usize> {
    let mut bits = Vec::new();
    for cfg in configs {
        if let Some(depth) = bit_depth_from_sample_format(cfg.sample_format()) {
            bits.push(depth);
        }
    }
    bits.sort_by(|a, b| b.cmp(a));
    bits.dedup();
    bits
}

#[cfg(target_os = "windows")]
pub(crate) fn discover_windows_output_bit_depths(device_id: &str) -> Vec<usize> {
    let fallback_bits = vec![32, 24, 16, 8];
    let requested_name = if let Some(name) = device_id.strip_prefix("wasapi:") {
        name
    } else {
        return fallback_bits;
    };
    let Ok(host) = cpal::host_from_id(cpal::HostId::Wasapi) else {
        return fallback_bits;
    };
    let device = if requested_name == "default" {
        host.default_output_device()
    } else {
        let Ok(mut devices) = host.output_devices() else {
            return fallback_bits;
        };
        devices.find(|dev| {
            dev.description()
                .is_ok_and(|desc| desc.name() == requested_name)
        })
    };
    let Some(device) = device else {
        return fallback_bits;
    };
    let Ok(configs) = device.supported_output_configs() else {
        return fallback_bits;
    };
    let bits = collect_supported_output_bit_depths(configs);
    if bits.is_empty() { fallback_bits } else { bits }
}