qdl: start an Introspect helper

qemu-rdw/src/audio.rs

@@ -10,13 +10,7 @@ pub struct Handler {
 }
 
 impl Handler {
-    pub async fn new(conn: &zbus::azync::Connection) -> Result<Self, Box<dyn Error>> {
-        if !Audio::available(conn).await {
-            log::debug!("No qemu audio provided on the bus");
-            return Ok(Self::default());
-        }
-
-        let audio = Audio::new(conn).await?;
+    pub async fn new(audio: Audio) -> Result<Self, Box<dyn Error>> {
         let rx = audio.listen_out().await?;
         let mut gst = rdw::GstAudio::new()?;
 

qemu-rdw/src/main.rs

@@ -2,7 +2,7 @@ use gio::ApplicationFlags;
 use glib::{clone, MainContext};
 use gtk::{gio, glib, prelude::*};
 use once_cell::sync::OnceCell;
-use qemu_display_listener::{Chardev, Console};
+use qemu_display_listener::{Chardev, Console, Introspect};
 use std::os::unix::io::AsRawFd;
 use std::os::unix::net::UnixStream;
 use zbus::Connection;
@@ -33,13 +33,17 @@ fn main() {
         let audio_clone = audio.clone();
         let clipboard_clone = clipboard.clone();
         MainContext::default().spawn_local(clone!(@strong window => async move {
+            let intro = Introspect::new(&conn).await.unwrap();
+
             let console = Console::new(&conn, 0).await.expect("Failed to get the QEMU console");
             let display = display_qemu::DisplayQemu::new(console);
             window.set_child(Some(&display));
 
-            match audio::Handler::new(&conn).await {
-                Ok(handler) => audio_clone.set(handler).unwrap(),
-                Err(e) => log::warn!("Failed to setup audio: {}", e),
+            if let Ok(Some(audio)) = intro.audio().await {
+                match audio::Handler::new(audio).await {
+                    Ok(handler) => audio_clone.set(handler).unwrap(),
+                    Err(e) => log::warn!("Failed to setup audio: {}", e),
+                }
             }
 
             match clipboard::Handler::new(&conn).await {