first commit

libmaestro/examples/maestro_write_settings.rs

@@ -0,0 +1,106 @@
+//! Simple example for changing settings on the Pixel Buds Pro via the Maestro service.
+//!
+//! Sets active nois ecancelling (ANC) state. 1: off, 2: active, 3: aware, 4.adaptive
+//!
+//! Usage:
+//!   cargo run --example maestro_write_settings -- <bluetooth-device-address> <anc-state>
+
+mod common;
+
+use std::str::FromStr;
+
+use anyhow::bail;
+use bluer::{Address, Session};
+use maestro::protocol::utils;
+use num_enum::FromPrimitive;
+
+use maestro::protocol::codec::Codec;
+use maestro::pwrpc::client::{Client, ClientHandle};
+use maestro::service::MaestroService;
+use maestro::service::settings::{AncState, SettingValue};
+
+
+#[tokio::main(flavor = "current_thread")]
+async fn main() -> Result<(), anyhow::Error> {
+    tracing_subscriber::fmt::init();
+
+    // handle command line arguments
+    let addr = std::env::args().nth(1).expect("need device address as argument");
+    let addr = Address::from_str(&addr)?;
+
+    let anc_state = std::env::args().nth(2).expect("need ANC state as argument");
+    let anc_state = i32::from_str(&anc_state)?;
+    let anc_state = AncState::from_primitive(anc_state);
+
+    if let AncState::Unknown(x) = anc_state {
+        bail!("invalid ANC state {x}");
+    }
+
+    // set up session
+    let session = Session::new().await?;
+    let adapter = session.default_adapter().await?;
+
+    println!("Using adapter '{}'", adapter.name());
+
+    // get device
+    let dev = adapter.device(addr)?;
+    let uuids = {
+        let mut uuids = Vec::from_iter(dev.uuids().await?
+            .unwrap_or_default()
+            .into_iter());
+
+        uuids.sort_unstable();
+        uuids
+    };
+
+    println!("Found device:");
+    println!("  alias:     {}", dev.alias().await?);
+    println!("  address:   {}", dev.address());
+    println!("  paired:    {}", dev.is_paired().await?);
+    println!("  connected: {}", dev.is_connected().await?);
+    println!("  UUIDs:");
+    for uuid in uuids {
+        println!("    {}", uuid);
+    }
+    println!();
+
+    println!("Connecting to Maestro profile");
+    let stream = common::connect_maestro_rfcomm(&session, &dev).await?;
+
+    println!("Profile connected");
+
+    // set up stream for RPC communication
+    let codec = Codec::new();
+    let stream = codec.wrap(stream);
+
+    // set up RPC client
+    let mut client = Client::new(stream);
+    let handle = client.handle();
+
+    // retreive the channel numer
+    let channel = utils::resolve_channel(&mut client).await?;
+
+    let exec_task = common::run_client(client);
+    let settings_task = read_settings(handle, channel, anc_state);
+
+    tokio::select! {
+        res = exec_task => {
+            match res {
+                Ok(_) => bail!("client terminated unexpectedly without error"),
+                Err(e) => Err(e),
+            }
+        },
+        res = settings_task => res,
+    }
+}
+
+async fn read_settings(handle: ClientHandle, channel: u32, anc_state: AncState) -> anyhow::Result<()> {
+    let mut service = MaestroService::new(handle.clone(), channel);
+
+    println!();
+    println!("Setting ANC status to '{}'", anc_state);
+
+    service.write_setting(SettingValue::CurrentAncrState(anc_state)).await?;
+
+    Ok(())
+}