LocalAI

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Ettore Di Giacinto 4d73df4945 backend(audio-cpp): harden seconds_to_samples against NaN and overflow

seconds_to_samples is the one entry point fed by untrusted-shaped input: a
float-seconds timestamp off the wire, or a boundary from a model that diverged.
Its guard covered only the low side, so NaN and out-of-range values fell through
to an undefined double-to-int64 cast and came back as INT64_MIN. A hugely
negative sample index used later as an offset or a length is a wild pointer
rather than merely a wrong timestamp. Reject NaN with the !(x > 0) form and
saturate before the cast.

Also round instead of truncating there. These functions exist to cross the float
seconds boundary the VAD and diarize messages use, and truncation lost a sample
about half the time on the samples-to-seconds-and-back round trip, starting at
n=1.

Pin the decode scale at INT16_MIN, pin nanosecond truncation on a nonzero
fraction, and record why the clamp argument order in f32_to_s16le is
load-bearing for NaN.

Assisted-by: Claude:claude-opus-5 [Claude Code]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

2026-07-29 19:03:32 +00:00

.gitignore

backend(audio-cpp): add the native build scaffold

2026-07-29 19:03:32 +00:00

audio_units_test.cpp

backend(audio-cpp): harden seconds_to_samples against NaN and overflow

2026-07-29 19:03:32 +00:00

audio_units.cpp

backend(audio-cpp): harden seconds_to_samples against NaN and overflow

2026-07-29 19:03:32 +00:00

audio_units.h

backend(audio-cpp): convert sample, time and PCM units