submitted 4 months ago by fil@programming.dev to c/rust@programming.dev

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I've needed to detect a frequency of an audio signal a couple of times in my life, but I cannot for the love of me remember what does the FFT output actually mean. So I took this knowledge out of my latest project and packed it up in this crate.

Also this is my first potentially useful published crate, so if I missed anything, please let me know!

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[-] anton@lemmy.blahaj.zone 3 points 4 months ago

The new version seems to fix that since your comment was written, but it will stil panics if less than 2 samples are provided, unless the crate it wraps panics at an earlier point.

let peak = buf
            .iter()
            .copied()
            .enumerate()
            .take(self.sample_count / 2)
            .max_by_key(|(_, s)| (s.abs() * 1000.0) as u32)
            .expect("to have at least 1 sample");