iris-chat 0.1.48

Iris Chat command line client and shared encrypted chat core
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

//! Outgoing progress sounds. This output-only worker never opens capture devices
//! or blocks the UI while the operating system opens an audio stream.
use std::sync::{
    atomic::{AtomicU8, Ordering},
    Arc,
};

#[derive(uniffi::Object)]
pub struct DesktopCallTone {
    state: Arc<AtomicU8>,
}
#[uniffi::export]
impl DesktopCallTone {
    #[uniffi::constructor]
    pub fn new(ringing: bool) -> Arc<Self> {
        let state = Arc::new(AtomicU8::new(if ringing { 2 } else { 1 }));
        #[cfg(feature = "desktop-media")]
        {
            let state = state.clone();
            std::thread::spawn(move || play(state));
        }
        Arc::new(Self { state })
    }
    pub fn set_ringing(&self, ringing: bool) {
        // Stop is terminal: a stale UI snapshot cannot revive a retired worker.
        #[allow(
            deprecated,
            reason = "The Linux release toolchain uses Rust 1.93, before Atomic::try_update stabilized."
        )]
        let _ = self
            .state
            .fetch_update(Ordering::AcqRel, Ordering::Acquire, |old| {
                (old != 0).then_some(if ringing { 2 } else { 1 })
            });
    }
    pub fn stop(&self) {
        self.state.store(0, Ordering::Release);
    }
}
impl Drop for DesktopCallTone {
    fn drop(&mut self) {
        self.stop();
    }
}

#[cfg(feature = "desktop-media")]
fn play(state: Arc<AtomicU8>) {
    use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
    let Some(device) = cpal::default_host().default_output_device() else {
        return;
    };
    let Ok(config) = device.default_output_config() else {
        return;
    };
    if state.load(Ordering::Acquire) == 0 {
        return;
    }
    let stream = match config.sample_format() {
        cpal::SampleFormat::F32 => stream::<f32>(&device, &config.into(), state.clone()),
        cpal::SampleFormat::I16 => stream::<i16>(&device, &config.into(), state.clone()),
        cpal::SampleFormat::U16 => stream::<u16>(&device, &config.into(), state.clone()),
        _ => return,
    };
    let Ok(stream) = stream else { return };
    if stream.play().is_err() {
        return;
    }
    while state.load(Ordering::Acquire) != 0 {
        std::thread::sleep(std::time::Duration::from_millis(20));
    }
}

#[cfg(feature = "desktop-media")]
fn stream<T>(
    device: &cpal::Device,
    config: &cpal::StreamConfig,
    state: Arc<AtomicU8>,
) -> Result<cpal::Stream, cpal::BuildStreamError>
where
    T: cpal::SizedSample + cpal::FromSample<f32>,
{
    use cpal::traits::DeviceTrait;
    let rate = config.sample_rate.0 as f64;
    let channels = config.channels as usize;
    let mut position = 0.0;
    let mut last = 0;
    let failed = state.clone();
    device.build_output_stream(
        config,
        move |output: &mut [T], _| {
            let tone = state.load(Ordering::Acquire);
            if tone != last {
                position = 0.0;
                last = tone;
            }
            for frame in output.chunks_mut(channels) {
                let value = sample(tone, position as usize);
                position += 16_000.0 / rate;
                frame.fill(T::from_sample(value));
            }
        },
        move |_| {
            failed.store(0, Ordering::Release);
        },
        None,
    )
}

#[cfg(any(feature = "desktop-media", test))]
fn sample(tone: u8, position: usize) -> f32 {
    let wav: &[u8] = match tone {
        1 => include_bytes!("../../assets/call-audio/call-connecting.wav"),
        2 => include_bytes!("../../assets/call-audio/call-ringing.wav"),
        _ => return 0.0,
    };
    // Canonical mono 16-bit PCM files from scripts/generate-call-tones.py.
    let index = 44 + (position % ((wav.len() - 44) / 2)) * 2;
    let Some(&[low, high]) = wav.get(index..index + 2) else {
        return 0.0;
    };
    f32::from(i16::from_le_bytes([low, high])) / 32768.0
}

#[cfg(test)]
mod tests {
    use super::*;
    #[test]
    fn outgoing_tones_have_distinct_cadence_and_stop_is_terminal() {
        assert!((0..1_920).any(|i| sample(1, i).abs() > 0.1));
        assert!((8_000..32_000).all(|i| sample(1, i) == 0.0));
        assert!((16_000..32_000).any(|i| sample(2, i).abs() > 0.1));
        assert!((32_000..96_000).all(|i| sample(2, i) == 0.0));
        assert_eq!(sample(2, 123), sample(2, 96_123));
        let tone = DesktopCallTone {
            state: Arc::new(AtomicU8::new(1)),
        };
        tone.set_ringing(true);
        assert_eq!(tone.state.load(Ordering::Acquire), 2);
        tone.stop();
        tone.set_ringing(false);
        assert_eq!(tone.state.load(Ordering::Acquire), 0);
        assert_eq!(sample(0, 123), 0.0);
    }
}