show buffer size and latency

crates/tek_api/src/api_clock.rs

@@ -47,17 +47,23 @@ pub struct ClockModel {
     pub quant:     Arc<Quantize>,
     /// Launch quantization factor
     pub sync:      Arc<LaunchSync>,
+    /// Size of buffer in samples
+    pub chunk:     Arc<AtomicUsize>,
 }
 
-impl From<&Arc<Transport>> for ClockModel {
-    fn from (transport: &Arc<Transport>) -> Self {
+impl From<&Arc<RwLock<JackClient>>> for ClockModel {
+    fn from (jack: &Arc<RwLock<JackClient>>) -> Self {
+        let jack      = jack.read().unwrap();
+        let chunk     = jack.client().buffer_size();
+        let transport = jack.client().transport();
         Self {
             playing:   RwLock::new(None).into(),
             started:   RwLock::new(None).into(),
             current:   Instant::default().into(),
             quant:     Arc::new(24.into()),
             sync:      Arc::new(384.into()),
-            transport: transport.clone(),
+            transport: Arc::new(transport),
+            chunk:     Arc::new((chunk as usize).into()),
         }
     }
 }
@@ -137,11 +143,18 @@ pub struct ClockAudio<'a, T: HasClock>(pub &'a mut T);
 impl<'a, T: HasClock> Audio for ClockAudio<'a, T> {
     #[inline] fn process (&mut self, _: &Client, scope: &ProcessScope) -> Control {
         let state = self.0.clock();
-        let times = scope.cycle_times().unwrap();
-        let CycleTimes { current_frames, current_usecs, next_usecs: _, period_usecs: _ } = times;
-        let _chunk_size = scope.n_frames() as usize;
+
+        // Update chunk size
+        state.chunk.store(scope.n_frames() as usize, Ordering::Relaxed);
+
+        // Query transport state
         let transport = state.transport.query().unwrap();
+
+        // FIXME duplicated
         state.current.sample.set(transport.pos.frame() as f64);
+
+        // Update play/pause state and starting point
+        let CycleTimes { current_frames, current_usecs, .. } = scope.cycle_times().unwrap();
         let mut playing = state.playing.write().unwrap();
         let mut started = state.started.write().unwrap();
         if *playing != Some(transport.state) {
@@ -159,10 +172,13 @@ impl<'a, T: HasClock> Audio for ClockAudio<'a, T> {
         if *playing == Some(TransportState::Stopped) {
             *started = None;
         }
+
+        // FIXME duplicated
         state.current.update_from_usec(match *started {
             Some((_, usecs)) => current_usecs as f64 - usecs as f64,
             None => 0.
         });
+
         Control::Continue
     }
 }

crates/tek_tui/src/tui_app_arranger.rs

@@ -30,7 +30,7 @@ impl TryFrom<&Arc<RwLock<JackClient>>> for ArrangerTui {
     fn try_from (jack: &Arc<RwLock<JackClient>>) -> Usually<Self> {
         Ok(Self {
             jack:       jack.clone(),
-            clock:      ClockModel::from(&Arc::new(jack.read().unwrap().transport())),
+            clock:      ClockModel::from(jack),
             phrases:    PhraseListModel::default(),
             editor:     PhraseEditorModel::default(),
             selected:   ArrangerSelection::Clip(0, 0),

crates/tek_tui/src/tui_app_sequencer.rs

@@ -20,7 +20,7 @@ pub struct SequencerTui {
 impl TryFrom<&Arc<RwLock<JackClient>>> for SequencerTui {
     type Error = Box<dyn std::error::Error>;
     fn try_from (jack: &Arc<RwLock<JackClient>>) -> Usually<Self> {
-        let clock = ClockModel::from(&Arc::new(jack.read().unwrap().transport()));
+        let clock = ClockModel::from(jack);
         Ok(Self {
             jack:     jack.clone(),
             phrases:  PhraseListModel::default(),
@@ -111,7 +111,7 @@ impl_focus!(SequencerTui SequencerFocus [
 pub struct SequencerStatusBar {
     pub(crate) cpu:  Option<String>,
     pub(crate) size: String,
-    pub(crate) sr:   String,
+    pub(crate) res:  String,
     pub(crate) mode: &'static str,
     pub(crate) help: &'static [(&'static str, &'static str, &'static str)]
 }
@@ -130,10 +130,13 @@ impl From<&SequencerTui> for SequencerStatusBar {
     fn from (state: &SequencerTui) -> Self {
         use SequencerFocus::*;
         use TransportFocus::*;
+        let samples = state.clock.chunk.load(Ordering::Relaxed);
+        let rate    = state.clock.current.timebase.sr.get() as f64;
+        let buffer  = samples as f64 / rate;
         Self {
-            cpu:  state.perf.percentage().map(|cpu|format!(" {cpu:.01}% ")),
-            size: format!(" {}x{} ", state.size.w(), state.size.h()),
-            sr:   format!(" {}Hz ",  state.clock.current.timebase.sr.get()),
+            cpu:  state.perf.percentage().map(|cpu|format!("│{cpu:.01}%")),
+            size: format!("{}x{}│", state.size.w(), state.size.h()),
+            res:  format!("│{}s│{:.1}kHz│{:.1}ms│", samples, rate / 1000., buffer * 1000.),
             mode: match state.focused() {
                 Transport(focus) => match focus {
                     PlayPause => " PLAY/PAUSE ",

crates/tek_tui/src/tui_app_transport.rs

@@ -25,7 +25,7 @@ impl TryFrom<&Arc<RwLock<JackClient>>> for TransportTui {
     fn try_from (jack: &Arc<RwLock<JackClient>>) -> Usually<Self> {
         Ok(Self {
             jack:   jack.clone(),
-            clock:  ClockModel::from(&Arc::new(jack.read().unwrap().transport())),
+            clock:  ClockModel::from(jack),
             size:   Measure::new(),
             cursor: (0, 0),
             focus:  FocusState::Entered(TransportFocus::PlayPause)

crates/tek_tui/src/tui_view_sequencer.rs

@@ -34,7 +34,7 @@ impl Content for SequencerStatusBar {
             widget(&self.mode).bg(orange).fg(black).bold(true),
             row!(
                 widget(&self.cpu).fg(orange),
-                widget(&self.sr).fg(orange),
+                widget(&self.res).fg(orange),
                 widget(&self.size).fg(orange),
             ).align_se().fill_x()
         )