better arg name

src/host/alsa/mod.rs

@@ -185,10 +185,10 @@ struct DeviceHandles {
 impl DeviceHandles {
     /// Create `DeviceHandles` for `name` and try to open a handle for both
     /// directions. Returns `Ok` if either direction is opened successfully.
-    fn open(name: &str) -> Result<Self, alsa::Error> {
+    fn open(pcm_id: &str) -> Result<Self, alsa::Error> {
         let mut handles = Self::default();
-        let playback_err = handles.try_open(name, alsa::Direction::Playback).err();
-        let capture_err = handles.try_open(name, alsa::Direction::Capture).err();
+        let playback_err = handles.try_open(pcm_id, alsa::Direction::Playback).err();
+        let capture_err = handles.try_open(pcm_id, alsa::Direction::Capture).err();
         if let Some(err) = capture_err.and(playback_err) {
             Err(err)
         } else {
@@ -202,7 +202,7 @@ impl DeviceHandles {
     /// `Option` is guaranteed to be `Some(..)`.
     fn try_open(
         &mut self,
-        name: &str,
+        pcm_id: &str,
         stream_type: alsa::Direction,
     ) -> Result<&mut Option<alsa::PCM>, alsa::Error> {
         let handle = match stream_type {
@@ -211,7 +211,7 @@ impl DeviceHandles {
         };
 
         if handle.is_none() {
-            *handle = Some(alsa::pcm::PCM::new(name, stream_type, true)?);
+            *handle = Some(alsa::pcm::PCM::new(pcm_id, stream_type, true)?);
         }
 
         Ok(handle)