define midi ins and audio outs in project

README.md

@@ -10,7 +10,7 @@ See `demos/project.edn` for the initial contents of the session.
 * Rust toolchain
 * JACK or Pipewire
 
-## Recommended
+### Recommended
 
 * MIDI controller
 * Samples at ~/Lab/Music/pak

demos/project.edn

@@ -1,5 +1,8 @@
 (bpm 150)
 
+(midi-in "nanoKEY Studio.*capture.*")
+(audio-out "Komplete.+:playback_FL", "Komplete.+:playback_FR")
+
 (scene { :name "Intro"  } _ 0 _ _)
 (scene { :name "Hook"   } 0 1 0 _)
 (scene { :name "Verse"  } 1 2 1 _)

src/edn.rs

@@ -59,6 +59,28 @@ impl App {
                     Some(Edn::Symbol("track")) => {
                         Track::load_edn(self, &items[1..])?;
                     },
+                    Some(Edn::Symbol("midi-in")) => {
+                        self.midi_ins = items[1..].iter().map(|x|match x {
+                            Edn::Str(n) => n.to_string(),
+                            _ => panic!("unexpected midi-in")
+                        }).collect::<Vec<_>>();
+                    },
+                    Some(Edn::Symbol("audio-out")) => {
+                        let client = self.client();
+                        self.audio_outs = items[1..].iter().map(|x|match x {
+                            Edn::Str(n) => n.to_string(),
+                            _ => panic!("unexpected midi-in")
+                        }).collect::<Vec<_>>()
+                            .iter()
+                            .map(|name|client
+                                .ports(Some(name), None, PortFlags::empty())
+                                .get(0)
+                                .map(|name|client.port_by_name(name)))
+                            .flatten()
+                            .filter_map(|x|x)
+                            .map(Arc::new)
+                            .collect();
+                    },
                     _ => panic!("unexpected edn: {:?}", items.get(0))
                 }
             },

src/main.rs

@@ -15,44 +15,40 @@ use crate::{core::*, model::*};
 
 /// Application entrypoint.
 pub fn main () -> Usually<()> {
-    let app = App::from_edn(include_str!("../demos/project.edn"))?
-        .with_midi_ins(&["nanoKEY Studio.*capture.*"])?
-        .with_audio_outs(&["Komplete.+:playback_FL", "Komplete.+:playback_FR"])?
-        .activate(Some(|app: &Arc<RwLock<App>>| {
+    run(App::from_edn(include_str!("../demos/project.edn"))?.activate(Some(|app: &Arc<RwLock<App>>| {
 
-            let (midi_in, mut midi_outs) = {
-                let app = app.read().unwrap();
-                let jack = app.jack.as_ref().unwrap();
-                let midi_in = jack.register_port("midi-in", MidiIn)?;
-                let midi_outs = app.tracks.iter()
-                    .map(|t|Some(jack.register_port(&t.name, MidiOut).unwrap()))
-                    .collect::<Vec<_>>();
-                (midi_in, midi_outs)
-            };
+        let (midi_in, mut midi_outs) = {
+            let app = app.read().unwrap();
+            let jack = app.jack.as_ref().unwrap();
+            let midi_in = jack.register_port("midi-in", MidiIn)?;
+            let midi_outs = app.tracks.iter()
+                .map(|t|Some(jack.register_port(&t.name, MidiOut).unwrap()))
+                .collect::<Vec<_>>();
+            (midi_in, midi_outs)
+        };
 
-            {
-                let mut app = app.write().unwrap();
-                let jack = app.jack.as_ref().unwrap();
-                for name in app.midi_ins.iter() {
-                    for port in jack.client().ports(Some(name), None, PortFlags::empty()).iter() {
-                        if let Some(port) = jack.client().port_by_name(port) {
-                            jack.client().connect_ports(&port, &midi_in)?;
-                        }
+        {
+            let mut app = app.write().unwrap();
+            let jack = app.jack.as_ref().unwrap();
+            for name in app.midi_ins.iter() {
+                for port in jack.client().ports(Some(name), None, PortFlags::empty()).iter() {
+                    if let Some(port) = jack.client().port_by_name(port) {
+                        jack.client().connect_ports(&port, &midi_in)?;
                     }
                 }
-                app.midi_in = Some(Arc::new(midi_in));
-                for (index, track) in app.tracks.iter_mut().enumerate() {
-                    track.midi_out = midi_outs[index].take();
-                }
-                for track in app.tracks.iter() {
-                    track.connect_first_device()?;
-                    track.connect_last_device(&app)?;
-                }
             }
+            app.midi_in = Some(Arc::new(midi_in));
+            for (index, track) in app.tracks.iter_mut().enumerate() {
+                track.midi_out = midi_outs[index].take();
+            }
+            for track in app.tracks.iter() {
+                track.connect_first_device()?;
+                track.connect_last_device(&app)?;
+            }
+        }
 
-            Ok(())
+        Ok(())
 
-        }))?;
-    run(app)?;
+    }))?)?;
     Ok(())
 }

src/model.rs

@@ -56,10 +56,10 @@ pub struct App {
     /// Paths to user directories
     xdg:               Option<Arc<XdgApp>>,
     /// Main audio outputs.
-    audio_outs:        Vec<Arc<Port<Unowned>>>,
+    pub audio_outs:    Vec<Arc<Port<Unowned>>>,
     /// Number of frames requested by process callback
     chunk_size:        usize,
-
+    /// Transport model and view.
     pub transport: TransportToolbar,
 }