[velociter] implement repetition

crates/velociter/src/lib.rs

@@ -13,6 +13,9 @@ baseplug::model! {
         #[model(min = 0.0, max = 127.9)]
         #[parameter(name = "max_vel")]
         max_vel: f32,
+        #[model(min = 0.0, max = 10.)]
+        #[parameter(name = "repetition")]
+        repetition: f32,
     }
 }
 
@@ -21,12 +24,15 @@ impl Default for VelociterModel {
         Self {
             min_vel: 0.0,
             max_vel: 127.9,
+            repetition: 0.0,
         }
     }
 }
 
 struct Velociter {
     notes: Vec<[u8; 3]>,
+    last_val: u8,
+    counter: u8,
 }
 
 impl Plugin for Velociter {
@@ -43,6 +49,8 @@ impl Plugin for Velociter {
     fn new(_sample_rate: f32, _model: &VelociterModel) -> Self {
         Self {
             notes: Vec::with_capacity(300),
+            last_val: 0,
+            counter: u8::MAX,
         }
     }
 
@@ -55,23 +63,32 @@ impl Plugin for Velociter {
         use rand::{thread_rng, Rng};
         let mut rng = thread_rng();
 
+        let min = model.min_vel[0];
+        let max = model.max_vel[0];
+        // make sure they're right
+        let (min, max) = (min.min(max), max.max(min));
+
+        for mut note in self.notes.drain(0..) {
+            let val = if model.repetition[0] < self.counter as f32 {
+                self.counter = 0;
+                rng.gen_range(min..max).trunc() as u8
+            } else {
+                self.counter += 1;
+                self.last_val
+            };
+            self.last_val = val;
+
+            note[2] = val;
+            let note = Event::<Velociter> {
+                frame: 0,
+                data: Data::Midi(note),
+            };
+            enqueue_midi(note);
+        }
+
         for i in 0..ctx.nframes {
             output[0][i] = input[0][i];
             output[1][i] = input[1][i];
-
-            let min = model.min_vel[i];
-            let max = model.max_vel[i];
-            // make sure they're right
-            let (min, max) = (min.min(max), max.max(min));
-
-            for mut note in self.notes.drain(0..) {
-                note[2] = rng.gen_range(min..max).trunc() as u8;
-                let note = Event::<Velociter> {
-                    frame: 0,
-                    data: Data::Midi(note),
-                };
-                enqueue_midi(note);
-            }
         }
     }
 }
@@ -81,4 +98,4 @@ impl MidiReceiver for Velociter {
     }
 }
 
-baseplug::vst2!(Velociter, b"tAnE");
+baseplug::vst2!(Velociter, b"iter");