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fix(bluetooth): use Shared mode for Oboe + delay restart for BT route

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Two fixes for BT audio silence:

1. Switch Oboe streams from Exclusive to Shared sharing mode. Exclusive
   mode bypasses Oboe's internal resampler, so opening a 48kHz stream
   against a BT SCO device (8/16kHz only) fails at the AudioPolicy
   level. Shared mode lets Oboe's resampler bridge the gap.

2. Add 500ms post-SCO delay before Oboe restart. The audio policy needs
   time to apply the bt-sco route after setCommunicationDevice returns.
   Without the delay, Oboe opens against the old device (handset).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Siavash Sameni
2026-04-12 17:14:06 +04:00
parent fd0ccf8e99
commit 5dfb5b3581
2 changed files with 11 additions and 9 deletions
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8
desktop/src-tauri/src/lib.rs
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@@ -794,7 +794,7 @@ async fn set_bluetooth_sco(on: bool) -> Result<(), String> {
// startBluetoothSco() is async — jumping straight to Oboe restart
// would open streams against earpiece, not the BT device.
let mut connected = false;
for i in 0..30 {
for i in 0..50 {
tokio::time::sleep(std::time::Duration::from_millis(100)).await;
if android_audio::is_bluetooth_sco_on().unwrap_or(false) {
tracing::info!(polls = i + 1, "set_bluetooth_sco: SCO connected");
@@ -803,8 +803,12 @@ async fn set_bluetooth_sco(on: bool) -> Result<(), String> {
}
}
if !connected {
tracing::warn!("set_bluetooth_sco: SCO did not connect within 3s, proceeding anyway");
tracing::warn!("set_bluetooth_sco: SCO did not connect within 5s, proceeding anyway");
}
// Extra delay: even after getCommunicationDevice reports BT,
// the audio policy needs ~500ms to apply the bt-sco route.
// Without this, Oboe opens against the old device.
tokio::time::sleep(std::time::Duration::from_millis(500)).await;
} else {
android_audio::stop_bluetooth_sco()?;
}