vhost-device-sound: Add GStreamer audio backend support

Add gstreamer backend.

Signed-off-by: nicholasdezai <[email protected]>

Author: nicholasdezai

vhost-device-i2c/src/main.rs

@@ -67,7 +67,8 @@ struct I2cArgs {
     socket_count: usize,
 
     /// List of I2C bus and clients in format
-    /// `<bus-name>:<client_addr>[:<client_addr>][,<bus-name>:<client_addr>[:<client_addr>]]`.
+    /// `<bus-name>:<client_addr>[:<client_addr>][,<bus-name>:<client_addr>[:
+    /// <client_addr>]]`.
     #[clap(short = 'l', long)]
     device_list: String,
 }

vhost-device-sound/CHANGELOG.md

@@ -3,6 +3,7 @@
 
 ### Added
 
+- [[#876]](https://github.com/rust-vmm/vhost-device/pull/876) Add GStreamer audio backend support
 - [[#806]](https://github.com/rust-vmm/vhost-device/pull/806) Add controls field in VirtioSoundConfig
 - [[#746]](https://github.com/rust-vmm/vhost-device/pull/746) Add new sampling rates 12000Hz and 24000Hz
 

vhost-device-sound/src/args.rs

@@ -25,4 +25,7 @@ pub enum BackendType {
     Pipewire,
     #[cfg(all(feature = "alsa-backend", target_env = "gnu"))]
     Alsa,
+    #[cfg(all(feature = "gst-backend", target_env = "gnu"))]
+    #[value(name = "gstreamer")]
+    GStreamer,
 }

vhost-device-sound/src/audio_backends.rs

@@ -8,10 +8,15 @@ mod null;
 #[cfg(all(feature = "pw-backend", target_env = "gnu"))]
 mod pipewire;
 
+#[cfg(all(feature = "gst-backend", target_env = "gnu"))]
+mod gstreamer;
+
 use std::sync::{Arc, RwLock};
 
 #[cfg(all(feature = "alsa-backend", target_env = "gnu"))]
 use self::alsa::AlsaBackend;
+#[cfg(all(feature = "gst-backend", target_env = "gnu"))]
+use self::gstreamer::GStreamerBackend;
 use self::null::NullBackend;
 #[cfg(all(feature = "pw-backend", target_env = "gnu"))]
 use self::pipewire::PwBackend;
@@ -61,6 +66,8 @@ pub fn alloc_audio_backend(
         }
         #[cfg(all(feature = "alsa-backend", target_env = "gnu"))]
         BackendType::Alsa => Ok(Box::new(AlsaBackend::new(streams))),
+        #[cfg(all(feature = "gst-backend", target_env = "gnu"))]
+        BackendType::GStreamer => Ok(Box::new(GStreamerBackend::new(streams))),
     }
 }