- ios_voice_unit.rs:856-868: Revert iOS render callback from blocking
lock() back to try_lock() with silence-on-contention (WouldBlock
branch increments callback_xrun stat and returns the pre-zeroed
scratch buffer). Blocking lock() inside the CoreAudio HAL render
callback can stall the realtime IO thread when the decode task on
engine.rs:1309 holds the same AudioHandler Mutex, re-introducing
the underrun pattern this codebase already fixed elsewhere.
- ios_voice_unit.rs:782: Preallocate scratch_stereo to Apple's VPIO
MaximumFramesPerSlice (4096 frames * 2 channels = 8192 f32) at
setup time, so the realtime render callback never grows the Vec
via resize(). The defensive 'len() < needed' branch is kept for
the (impossible) case that the audio unit later raises max frames.
- main.dart:52-56: Gate _showAudioDebugOverlay behind kDebugMode &&
_isMacOS so the internal audio stats panel does not ship in
release builds. kDebugMode is a Dart compile-time const, so the
overlay subtree is tree-shaken out of release/profile binaries.
- Rebuilt macOS chanora_bridge.framework binary (universal arm64 +
x86_64) from the fixed source with the new CARGO_PROFILE_RELEASE_*
env vars (DWARF preserved for dsymutil). install_name patched back
to @rpath/chanora_bridge.framework/Versions/A/chanora_bridge.
Verified:
cargo test -p chanora_audio --lib: 129 passed, 0 failed
cargo check -p chanora_audio --target aarch64-apple-ios: clean
dart analyze lib/main.dart: no issues
xcrun lipo -archs: x86_64 arm64
xcrun otool -D: @rpath install_name preserved
Edison Jwa
ebae1274d6