sort webcam info by index

Author: kaikalii

src/sys/native.rs

@@ -1170,8 +1170,10 @@ impl SysBackend for NativeSys {
     }
     #[cfg(feature = "webcam")]
     fn webcam_list(&self) -> Result<Vec<String>, String> {
-        Ok(nokhwa::query(nokhwa::utils::ApiBackend::Auto)
-            .map_err(|e| e.to_string())?
+        let mut cam_infos =
+            nokhwa::query(nokhwa::utils::ApiBackend::Auto).map_err(|e| e.to_string())?;
+        cam_infos.sort_by_key(|info| info.index().clone());
+        Ok(cam_infos
             .into_iter()
             .map(|info| info.human_name())
             .collect())