wip: optional dependency from mixer to sampler and plugin

crates/tek_sampler/src/sample.rs

@@ -11,6 +11,31 @@ pub struct Sample {
 }
 
 impl Sample {
+    pub fn from_edn <'e> (dir: &str, args: &[Edn<'e>]) -> Usually<(Option<u7>, Arc<RwLock<Self>>)> {
+        let mut name = String::new();
+        let mut file = String::new();
+        let mut midi = None;
+        let mut start = 0usize;
+        edn!(edn in args {
+            Edn::Map(map) => {
+                if let Some(Edn::Str(n)) = map.get(&Edn::Key(":name")) {
+                    name = String::from(*n);
+                }
+                if let Some(Edn::Str(f)) = map.get(&Edn::Key(":file")) {
+                    file = String::from(*f);
+                }
+                if let Some(Edn::Int(i)) = map.get(&Edn::Key(":start")) {
+                    start = *i as usize;
+                }
+                if let Some(Edn::Int(m)) = map.get(&Edn::Key(":midi")) {
+                    midi = Some(u7::from(*m as u8));
+                }
+            },
+            _ => panic!("unexpected in sample {name}"),
+        });
+        let (end, data) = read_sample_data(&format!("{dir}/{file}"))?;
+        Ok((midi, Arc::new(RwLock::new(Self::new(&name, start, end, data)))))
+    }
     pub fn new (name: &str, start: usize, end: usize, channels: Vec<Vec<f32>>) -> Self {
         Self { name: name.to_string(), start, end, channels, rate: None }
     }