The PR #27 refactor moved the iOS render callback to a direct-fill
path with its own peak_i16 == 0 check, dropping the !muted gate
that PR #28 added to the pre-refactor callback. Without this
gate, every muted callback fires a false-positive
increment_output_underrun() because the downmix helper writes
silence (peak_i16 = 0) by design when muted.
Re-apply PR #28's gate to the refactored iOS path so this PR does
not silently reintroduce the bug PR #28 was opened to fix.
Verified:
- cargo test -p chanora_audio --lib: 133 passed, 0 failed
- cargo build -p chanora_audio --target aarch64-apple-ios: clean
Edison Jwa
76fe8faa94