manawenuz/wz-phone
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix(bluetooth): BT SCO mode skips 48kHz + VoiceCommunication on capture

Browse Source 
Root cause: Oboe capture at 48kHz with InputPreset::VoiceCommunication
cannot open against a BT SCO device (only supports 8/16kHz). The stream
silently falls back to builtin mic, delivering zeros.

Fix: add bt_active flag to WzpOboeConfig. When set, capture skips
setSampleRate and setInputPreset, letting the system route to BT SCO
at its native rate. Oboe's SampleRateConversionQuality::Best resamples
to 48kHz for our ring buffers. Playout uses Usage::Media in BT mode.

New API: wzp_native_audio_start_bt() for BT mode, called from
set_bluetooth_sco(on=true). Normal audio_start() restores the
standard config when switching back to earpiece/speaker.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Siavash Sameni
2026-04-12 17:23:19 +04:00
parent 5dfb5b3581
commit 137fe5f084
5 changed files with 65 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
crates/wzp-native/src/lib.rs
View File

@@ -47,6 +47,10 @@ struct WzpOboeConfig {
sample_rate: i32,
frames_per_burst: i32,
channel_count: i32,
/// When nonzero, capture stream skips setSampleRate and setInputPreset
/// so the system can route to BT SCO at its native rate (8/16kHz).
/// Oboe's SampleRateConversionQuality::Best resamples to 48kHz.
bt_active: i32,
}
#[repr(C)]
@@ -204,6 +208,17 @@ fn backend() -> &'static AudioBackend {
/// Idempotent — calling while already running is a no-op that returns 0.
#[unsafe(no_mangle)]
pub extern "C" fn wzp_native_audio_start() -> i32 {
audio_start_inner(false)
}
/// Start Oboe in Bluetooth SCO mode — skips sample rate and input preset
/// on capture so the system can route to the BT SCO device natively.
#[unsafe(no_mangle)]
pub extern "C" fn wzp_native_audio_start_bt() -> i32 {
audio_start_inner(true)
}
fn audio_start_inner(bt: bool) -> i32 {
let b = backend();
let mut started = match b.started.lock() {
Ok(g) => g,
@@ -217,6 +232,7 @@ pub extern "C" fn wzp_native_audio_start() -> i32 {
sample_rate: 48_000,
frames_per_burst: FRAME_SAMPLES as i32,
channel_count: 1,
bt_active: if bt { 1 } else { 0 },
};
let rings = WzpOboeRings {
capture_buf: b.capture.buf_ptr(),