feat: usb mode, battery percentage

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/hardware/xt5.rs

@@ -1,18 +1,31 @@
-use super::Camera;
+use std::sync::atomic::{AtomicU32, Ordering};
+
+use super::{CameraId, CameraImpl};
+
+pub const FUJIFILM_XT5: CameraId = CameraId {
+    vendor: 0x04cb,
+    product: 0x02fc,
+};
 
 #[derive(Debug)]
-pub struct FujifilmXT5;
+pub struct FujifilmXT5 {
+    session_counter: AtomicU32,
+}
 
-impl Camera for FujifilmXT5 {
-    fn vendor_id(&self) -> u16 {
-        0x04cb
-    }
-
-    fn product_id(&self) -> u16 {
-        0x02fc
+impl FujifilmXT5 {
+    pub fn new() -> Self {
+        Self {
+            session_counter: AtomicU32::new(1),
+        }
     }
+}
 
+impl CameraImpl for FujifilmXT5 {
     fn name(&self) -> &'static str {
         "FUJIFILM X-T5"
     }
+
+    fn next_session_id(&self) -> u32 {
+        self.session_counter.fetch_add(1, Ordering::SeqCst)
+    }
 }