Unpause on first beat after tap-in

Before this patch it unpaused on the fourth tap, which is counter
intuitive.

Signed-off-by: Petr Horacek <petr@zlosynth.com>

control/src/cache/interval_detector.rs

@@ -15,6 +15,7 @@ pub struct IntervalDetector {
     trigger_age: [u32; 3],
     pub tempo: Option<u32>,
     pub just_detected: bool,
+    pub first_beat_after_detection: bool,
 }
 
 impl IntervalDetector {
@@ -51,6 +52,10 @@ impl IntervalDetector {
             *x = x.saturating_add(1);
         }
         self.just_detected = false;
+
+        if let Some(tempo) = self.tempo {
+            self.first_beat_after_detection = self.trigger_age[2] == tempo;
+        }
     }
 }
 

control/src/cache/reconcile/speed.rs

@@ -39,7 +39,7 @@ impl Store {
         self.cache.requests.reset_impulse =
             just_triggered_clock || just_triggered_tap || just_triggered_position_reset;
 
-        if just_triggered_tap {
+        if self.cache.tap_detector.first_beat_after_detection() {
             self.cache.attributes.paused_delay = false;
             self.cache.display.reset_paused();
         }

control/src/cache/tap_clock_detector.rs

@@ -33,4 +33,7 @@ impl TapClockDetector {
     pub fn detected_tempo(&self) -> Option<u32> {
         self.detector.tempo
     }
+    pub fn first_beat_after_detection(&self) -> bool {
+        self.detector.first_beat_after_detection
+    }
 }