impl PortList for Sampler

src/device/sampler.rs

@@ -11,61 +11,9 @@ pub struct Sampler {
     samples:         Arc<Mutex<Vec<Sample>>>,
     selected_sample: usize,
     selected_column: usize,
-}
-
-impl Sampler {
-    pub fn new (name: &str) -> Result<DynamicDevice<Self>, Box<dyn Error>> {
-        let (client, _) = Client::new(name, ClientOptions::NO_START_SERVER)?;
-        let samples = vec![
-            Sample::new("Kick", &client, 1, 35)?,
-            Sample::new("Snare", &client, 1, 38)?,
-        ];
-        let samples = Arc::new(Mutex::new(samples));
-        let input = client.register_port("trigger", ::jack::MidiIn::default())?;
-        Ok(DynamicDevice::new(render, handle, process, Self {
-            name: name.into(),
-            input,
-            selected_sample: 0,
-            selected_column: 0,
-            samples,
-        }))
-    }
-}
-
-pub fn process (
-    state:  &mut Sampler,
-    _: &Client,
-    scope:  &ProcessScope,
-) -> Control {
-    let mut samples = state.samples.lock().unwrap();
-    for event in state.input.iter(scope) {
-        let len = 3.min(event.bytes.len());
-        let mut data = [0; 3];
-        data[..len].copy_from_slice(&event.bytes[..len]);
-        if (data[0] >> 4) == 0b1001 { // note on
-            let channel  = data[0] & 0b00001111;
-            let note     = data[1];
-            let velocity = data[2];
-            for sample in samples.iter_mut() {
-                if sample.trigger.0 == channel && sample.trigger.1 == note {
-                    sample.play(velocity);
-                }
-            }
-        }
-        for sample in samples.iter_mut() {
-            if let Some(playing) = sample.playing {
-                for (index, value) in sample.port.as_mut_slice(scope).iter_mut().enumerate() {
-                    *value = *sample.data[0].get(playing + index).unwrap_or(&0f32);
-                }
-                if playing + scope.n_frames() as usize > sample.data[0].len() {
-                    sample.playing = None
-                } else {
-                    sample.playing = Some(playing + scope.n_frames() as usize)
-                }
-            }
-        }
-    }
-    Control::Continue
+    midi_ins:        Vec<Port<MidiIn>>,
+    audio_ins:       Vec<Port<AudioIn>>,
+    audio_outs:      Vec<Port<AudioOut>>,
 }
 
 pub struct Sample {
@@ -79,6 +27,86 @@ pub struct Sample {
     playing:  Option<usize>,
 }
 
+impl Sampler {
+    pub fn new (name: &str) -> Result<DynamicDevice<Self>, Box<dyn Error>> {
+        let (client, _) = Client::new(name, ClientOptions::NO_START_SERVER)?;
+        let samples = vec![
+            Sample::new("Kick", &client, 1, 35)?,
+            Sample::new("Snare", &client, 1, 38)?,
+        ];
+        let samples = Arc::new(Mutex::new(samples));
+        let input = client.register_port("trigger", ::jack::MidiIn::default())?;
+        Ok(DynamicDevice::new(render, handle, Self::process, Self {
+            name: name.into(),
+            input,
+            selected_sample: 0,
+            selected_column: 0,
+            samples,
+            midi_ins:   vec![],
+            audio_ins:  vec![],
+            audio_outs: vec![],
+        }))
+    }
+
+    pub fn process (&mut self, _: &Client, scope:  &ProcessScope) -> Control {
+        let mut samples = self.samples.lock().unwrap();
+        for event in self.input.iter(scope) {
+            let len = 3.min(event.bytes.len());
+            let mut data = [0; 3];
+            data[..len].copy_from_slice(&event.bytes[..len]);
+            if (data[0] >> 4) == 0b1001 { // note on
+                let channel  = data[0] & 0b00001111;
+                let note     = data[1];
+                let velocity = data[2];
+                for sample in samples.iter_mut() {
+                    if sample.trigger.0 == channel && sample.trigger.1 == note {
+                        sample.play(velocity);
+                    }
+                }
+            }
+            for sample in samples.iter_mut() {
+                if let Some(playing) = sample.playing {
+                    for (index, value) in sample.port.as_mut_slice(scope).iter_mut().enumerate() {
+                        *value = *sample.data[0].get(playing + index).unwrap_or(&0f32);
+                    }
+                    if playing + scope.n_frames() as usize > sample.data[0].len() {
+                        sample.playing = None
+                    } else {
+                        sample.playing = Some(playing + scope.n_frames() as usize)
+                    }
+                }
+            }
+        }
+        Control::Continue
+    }
+
+    fn load_sample (&mut self, path: &str) {}
+}
+
+impl PortList for Sampler {
+    fn audio_ins (&self) -> Usually<Vec<String>> {
+        let mut ports = vec![];
+        for port in self.audio_ins.iter() {
+            ports.push(port.name()?);
+        }
+        Ok(ports)
+    }
+    fn audio_outs (&self) -> Usually<Vec<String>> {
+        let mut ports = vec![];
+        for port in self.audio_outs.iter() {
+            ports.push(port.name()?);
+        }
+        Ok(ports)
+    }
+    fn midi_ins (&self) -> Usually<Vec<String>> {
+        let mut ports = vec![];
+        for port in self.midi_ins.iter() {
+            ports.push(port.name()?);
+        }
+        Ok(ports)
+    }
+}
+
 impl Sample {
 
     pub fn new (name: &str, client: &Client, channel: u8, note: u8) -> Result<Self, Box<dyn Error>> {