feat(audio): prefer native voice backends

crates/chanora_audio/src/lib.rs

@@ -5,12 +5,13 @@
 //!
 //! ## What's wired in this Beta
 //!
-//! * Default-input capture via `cpal` (DEC-011.1)
+//! * Default-input capture via platform audio backends (Oboe on Android,
+//!   VoiceProcessingIO on Apple platforms, cpal/SDL elsewhere)
 //! * Frame-aligned 20 ms / 48 kHz mono Opus encoding via `audiopus`
 //! * Forward encoded frames to the protocol crate as `OutPacket`s
 //! * Inbound voice packets fed to `tsclientlib::audio::AudioHandler`
 //!   which owns Opus decode + per-client jitter buffer + mix
-//! * Mixed f32 PCM pulled by the cpal output callback at 48 kHz stereo
+//! * Mixed f32 PCM pulled by the platform output callback at 48 kHz stereo
 //! * Push-to-talk: capture stream is permanently open; encoding is
 //!   gated by an atomic `ptt_active` flag
 //!
@@ -19,8 +20,6 @@
 //! * AEC / AGC / NS / HPF DSP chain (DEC-007/008/009/010 — Beta+
 //!   work; the toggles in `AudioEffects` are honoured by *naming*
 //!   but the filters are no-ops)
-//! * Mobile audio paths (DEC-011.1 desktop + Android proven; this
-//!   integration is desktop-only for v0.2.0-beta.1)
 //! * Hot-plug device-change handling
 //! * Sample-rate adaptation if the device cannot do 48 kHz / mono in
 //!   the format we request (returns `AudioError::StreamConfig`)
@@ -40,7 +39,7 @@ pub mod transmit_selector;
 #[cfg(target_os = "linux")]
 mod sdl_output;
 
-#[cfg(target_os = "ios")]
+#[cfg(any(target_os = "ios", target_os = "macos"))]
 mod ios_voice_unit;
 
 #[cfg(target_os = "android")]
@@ -52,7 +51,7 @@ pub use engine::{AudioEngine, AudioEngineConfig};
 // bench harness under `crates/chanora_audio/benches/` can construct a
 // CaptureState and drive `ingest` without re-implementing the engine.
 // Not part of the supported public API.
-#[cfg(not(any(target_os = "ios", target_os = "android")))]
+#[cfg(not(any(target_os = "ios", target_os = "macos", target_os = "android")))]
 #[doc(hidden)]
 pub use engine::bench_seam;
 pub use ptt::{AudioTransmitGate, MissedKeyUpWatchdog, PttBackendDescriptor, PttCapabilityLevel};