Moar speed

src/widgets/alsaaudio.rs

@@ -0,0 +1,112 @@
+use std::{
+    thread,
+    sync::{Arc, Mutex},
+};
+
+use crate::{
+    color::Color,
+    fonts::FontMap,
+    event::{Event, Events, PointerButton},
+    widgets::bar_widget::{BarWidget, BarWidgetImpl},
+};
+
+use alsa::mixer::{
+    Mixer, Selem, SelemChannelId, SelemId,
+};
+
+#[inline]
+fn alsa_volume_to_f32(volume: i64, min: i64, max: i64) -> f32 {
+    (volume - min) as f32 / (max - min) as f32
+}
+
+#[inline]
+fn f32_to_alsa_volume(volume: f32, min: i64, max: i64) -> i64 {
+    min + ((max - min) as f32 * volume) as i64
+}
+
+fn get_master_volume(selem: &mut Selem) -> f32 {
+    let (min, max) = selem.get_playback_volume_range();
+    selem
+        .get_playback_volume(SelemChannelId::mono())
+        .map(|volume| alsa_volume_to_f32(volume, min, max))
+        .unwrap()
+}
+
+fn get_mute(selem: &mut Selem) -> bool {
+    let res = selem.get_playback_switch(SelemChannelId::FrontLeft);
+    false
+}
+
+fn set_master_volume(selem: &mut Selem, volume: f32) {
+    let (min, max) = selem.get_playback_volume_range();
+    let volume = f32_to_alsa_volume(volume, min, max);
+    selem.set_playback_volume_all(volume).unwrap();
+}
+
+fn start_monitor(inner: Arc<Mutex<Inner>>) {
+    thread::Builder::new()
+        .name("audiomon".to_string())
+        .spawn(move || {
+            let mixer = Mixer::new("default", true).unwrap();
+            let id = SelemId::new("Master", 0);
+            let mut selem = mixer.find_selem(&id).unwrap();
+
+            let mut inner = inner.lock().unwrap();
+            inner.volume = get_master_volume(&mut selem);
+            inner.mute = get_mute(&mut selem);
+        })
+        .unwrap();
+}
+
+struct Inner {
+    volume: f32,
+    mute: bool,
+}
+
+pub struct AlsaAudio {
+    inner: Arc<Mutex<Inner>>,
+}
+
+impl AlsaAudio {
+    pub fn new(fm: &mut FontMap, font: &'static str, size: f32) -> BarWidget {
+        let inner = Arc::new(Mutex::new(Inner{
+            mute: false,
+            volume: 0.,
+        }));
+        start_monitor(inner.clone());
+        let dev = AlsaAudio{ inner };
+        BarWidget::new(Box::new(dev), fm, font, size)
+    }
+}
+
+impl BarWidgetImpl for AlsaAudio {
+    fn name(&self) -> &'static str {
+        "audio"
+    }
+    fn get_dirty(&self) -> bool {
+        true
+    }
+    fn value(&mut self) -> f32 {
+        let inner = self.inner.lock().unwrap();
+        inner.volume
+    }
+    fn color(&self) -> Color {
+        let inner = self.inner.lock().unwrap();
+        if inner.mute {
+            Color::DARKORANGE
+        } else {
+            Color::WHITE
+        }
+    }
+    fn click(&mut self, pos: f32, btn: PointerButton) {
+        let inner = self.inner.lock().unwrap();
+        match btn {
+//            PointerButton::Left =>  inner.set_master_volume(pos),
+            //PointerButton::Right => Some(Change::ToggleMute),
+            //PointerButton::ScrollVertical(val) => Some(Change::VolumeInc((val / 512.) as f32)),
+            //PointerButton::ScrollHorizontal(val) => Some(Change::VolumeInc((val / 100.) as f32)),
+            _ => (),
+        };
+    }
+
+}