feat: add set gain

src-tauri/src/state.rs

@@ -1,14 +1,21 @@
-use std::sync::Mutex;
+use std::sync::{Mutex, Arc};
+use std::collections::HashMap;
 use dsp_thomann::dsp408::DSP408;
 
+pub struct DSPDevice {
+    pub dsp: DSP408,
+}
+
 pub struct AppState {
-    pub devices: Mutex<Vec<DSP408>>,
+    pub devices: Mutex<HashMap<u64, Arc<Mutex<DSPDevice>>>>,
+    pub next_id: Mutex<u64>,
 }
 
 impl AppState {
     pub fn new() -> Self {
         Self {
-            devices: Mutex::new(Vec::new()),
+            devices: Mutex::new(HashMap::new()),
+            next_id: Mutex::new(1),
         }
     }
 }