wip: optional dependency from mixer to sampler and plugin

crates/tek_plugin/src/plugin.rs

@@ -23,6 +23,18 @@ pub enum PluginKind {
 }
 
 impl Plugin {
+    pub fn new_lv2 (name: &str, path: &str) -> Usually<JackDevice> {
+        let plugin = LV2Plugin::new(path)?;
+        jack_from_lv2(name, &plugin.plugin)?
+            .run(|ports|Box::new(Self {
+                name:       name.into(),
+                path:       Some(String::from(path)),
+                plugin:     Some(PluginKind::LV2(plugin)),
+                selected:   0,
+                mapping:    false,
+                ports
+            }))
+    }
     /// Create a plugin host device.
     pub fn new (name: &str) -> Usually<Self> {
         Ok(Self {